1. A method for treating and recycling wastewater for textile printing and dyeing is characterized by comprising the following steps: the wastewater treatment and recycling method comprises the following specific steps:

the method comprises the following steps: introducing the textile printing and dyeing wastewater flowing out of the workshop into a regulating tank for pH regulation to make the wastewater suitable for living of organisms;

step two: introducing the regulated wastewater into a treatment tank, and treating pollutants in the wastewater by using microorganisms in the treatment tank;

step three: introducing the wastewater after the microbial treatment into a middle sedimentation tank for precipitating most of pollutants;

step four: introducing the upper part of the precipitated wastewater into an air floatation device, aerating in the air floatation device, and floating and discharging small and medium particle pollutants in the wastewater;

step five: the wastewater after aeration treatment meets the discharge requirement and can be directly discharged or recycled;

wherein, the air flotation device in the fourth step comprises an air flotation tank (1), the air flotation tank (1) is communicated with a communicating pipe (2), the bottom of the air flotation tank (1) is fixedly connected with a plurality of aeration pipes (3), the right side of the air flotation tank (1) is fixedly connected with a collection box (4), the top of the collection box (4) is lower than the top end of the air flotation tank (1), the inner side wall of the air flotation tank (1) is rotatably connected with a rotating shaft (5) close to the right position, the front end of the rotating shaft (5) penetrates through the air flotation tank (1) and is connected with a driving mechanism for driving the rotating shaft (5) to rotate, a foam penetrating plate (6) is fixedly connected on the partial outer surface of the inner part of the air flotation tank (1) of the rotating shaft (5), a foam penetrating port (7) is formed in the middle part of the foam penetrating plate (6), and the left end of the foam penetrating plate (6) is contacted with the inner left side wall of the air flotation tank (1), penetrate four first slide bars (8) of foam board (6) bottom fixedly connected with, four first slide bar (8) are connected with gasbag (9) jointly, penetrate equal fixedly connected with polished rod (10) around foam board (6) top, two common sliding connection has scraper blade (11) on polished rod (10) surface, be connected with on air supporting pond (1) the left side wall and be used for the cooperation to penetrate foam board (6) and rotate the mechanism of withdrawing with aeration foam exhaust.

2. The method for treating and recycling the wastewater for textile printing and dyeing according to claim 1, wherein the method comprises the following steps: withdraw the mechanism and include rectangle baffle (12), first spout (13), set up the right side at air supporting pond (1) top in first spout (13), rectangle baffle (12) sliding connection is in first spout (13), equal fixedly connected with U type link (14), two around on rectangle baffle (12) the right side wall the equal fixedly connected with rack (15) in U type link (14) bottom, the equal fixedly connected with first gear (16) in both ends around axis of rotation (5), two around first gear (16) mesh rather than rack (15) on right side respectively.

3. The method for treating and recycling the wastewater for textile printing and dyeing according to claim 1, wherein the method comprises the following steps: every it all through two first connecting block (17) fixedly connected with second slide bar (18) on foam mouthful (7) inside wall, every equal sliding connection has and sealed dish (19) on second slide bar (18) lateral wall, sealed dish (19) top is seted up and is supplied its top two the recess of first connecting block (17) embedding, every row adjacent two all through first connecting plate (20) fixed connection between sealed dish (19), a plurality of capable of walking together first connecting plate (20) bottom is fixedly connected with lifter plate (21) jointly, foam board (6) bottom fixedly connected with four L type backup pad (22), four equal fixedly connected with first spring (23) in L type backup pad (22) top, four equal fixedly connected with the bottom in lifter plate (21) in first spring (23) top, equal fixedly connected with two second connecting block (24) on the lateral wall around gasbag (9), every the equal sliding sleeve of second connecting block (24) is established on the surface of first slide bar (8), four first slide bar (8) is the first fender dish of equal fixedly connected with (25) in appearance, pass through two support frames (26) of foam board (6) bottom fixedly connected with, two support frame (26) are located the left and right sides of gasbag (9) respectively, two all rotate on support frame (26) inside wall and are connected with guide pulley (27), two stay cords (28) of fixedly connected with on gasbag (9) outside wall, its guide pulley (27) and the bottom of fixed connection at first connecting plate (20) with the homonymy are walked around respectively to the outer end of stay cord (28).

4. The method for treating and recycling the wastewater for textile printing and dyeing according to claim 1, wherein the method comprises the following steps: the air floatation device is characterized in that the rotating shaft (5) is located on the outer surface of the part of the rear side of the air floatation tank (1), the rotating disc (29) is fixedly connected to the outer surface of the part of the rear side of the air floatation tank (1), the guide blocks (30) distributed in a plurality of annular arrays are fixedly connected to the rear side of the rotating disc (29), the arc sliding plate (31) is slidably connected to the rear side wall of the air floatation tank (1), the front side wall of the arc sliding plate (31) is in contact with the rear side wall of the foam penetrating plate (6), the L-shaped connecting block (32) is fixedly connected to the rear side wall of the air floatation tank (1), the third sliding rod (33) is fixedly connected to the rear side wall of the arc sliding plate (31), the third sliding rod (33) is slidably connected to the inside of the L-shaped connecting block (32), the rear end of the third sliding rod (33) is fixedly connected with the guide plate (34), the guide plate (34) is used for acting with the guide blocks (30), and the part, which is located between the L-shaped connecting block (32) and the guide plate (34) on the surface of the third sliding rod (33) is sleeved with a second spring (35).

5. The method for treating and recycling the wastewater for textile printing and dyeing according to claim 4, wherein the method comprises the following steps: second spout (36) have been seted up on scraper blade (11) right side wall, sliding connection has rectangle slip strip (37) on second spout (36) inside wall, rectangle slip strip (37) front end fixedly connected with third spring (38), third spring (38) front end fixed connection is on the inside wall of second spout (36), a plurality of foam pieces (39) of scraping of fixedly connected with on rectangle slip strip (37) right side wall.

6. The method for treating and recycling the wastewater for textile printing and dyeing according to claim 1, wherein the method comprises the following steps: the driving mechanism comprises a servo motor (40), the servo motor (40) is fixedly connected to the front side wall of the air floatation tank (1), a second gear (41) is fixedly connected to the outer surface of an output shaft of the servo motor (40), a third gear (42) is fixedly connected to the outer surface of the rotating shaft (5), and the third gear (42) is in transmission connection with the second gear (41) through a toothed chain (43).

Background

With the development of society, people have higher and higher requirements on the appearance, color and the like of textiles, and the dyeing technology is also improved and developed. The printing and dyeing industry is a typical high-water-consumption industry, which needs to consume nearly hundred million tons of softened water for the process every year, a large amount of printing and dyeing wastewater can be generated in the processes of pretreatment, dyeing, printing and finishing of textile products such as cotton, wool, chemical fibers and the like, and the printing and dyeing wastewater is the main colored wastewater in industrial wastewater in China and occupies a large proportion of the wastewater. With the rapid development of the dye industry, the currently used dyes are tens of thousands, which also causes the problem of complex components of the printing and dyeing wastewater, deepens the treatment difficulty of the printing and dyeing wastewater, and the printing and dyeing wastewater becomes one of the accepted industrial wastewater which is difficult to treat at home and abroad.

In the case of the invention of a method for treating and recycling wastewater for textile printing and dyeing disclosed in the prior art, a Chinese patent with the patent application number of CN201711419987.0 is invented, and the method for treating the wastewater for textile printing and dyeing comprises the following steps: (1) filtering the wastewater, and adjusting the pH value of the wastewater; (2) controlling the temperature of the waste water to be 25-35 ℃, and adding hydrolysis-acidification bacteria; (3) carrying out aeration treatment by using a blower; (4) adding a coagulant into the wastewater, stirring, standing, and separating a supernatant; (5) adding an adsorbent into the supernatant; (6) adjusting the pH value of the solution, and then adding the modified soybean meal protein; (7) firstly, adjusting the pH value of the wastewater to 4.0-6.0, stirring, and then adjusting the pH value to be neutral; (8) and pouring the neutral wastewater into an activated carbon adsorption column, and filtering to obtain the treated printing and dyeing wastewater.

When utilizing the air supporting pond to take the pollutant that is difficult to direct sediment removal in the waste water to waste water aeration among the prior art, the aeration takes the pollutant granule in the waste water to float at the top of waste water, when the air supporting pond lasts to carry out aeration treatment to waste water, the foam that floats afterwards can lead to the foam damage that floats earlier, and the pollutant granule in the waste water that leads to taking in the foam that floats earlier drops once more in the waste water, reduces the treatment effeciency of air supporting pond to waste water.

Disclosure of Invention

The invention aims to provide a method for treating and recycling wastewater for textile printing and dyeing, which aims to solve the problems that in the prior art, when an air floatation tank is used for aerating wastewater to bring up pollutants which are difficult to directly precipitate and remove in the wastewater, pollutant particles in the wastewater brought up by aeration float on the top of the wastewater, and when the air floatation tank continuously aerates the wastewater, later floating foam can cause damage to first floating foam, so that the pollutant particles in the wastewater brought up by the first floating foam fall into the wastewater again, and the wastewater treatment efficiency of the air floatation tank is reduced.

In order to achieve the purpose, the invention provides the following technical scheme: a method for treating and recycling wastewater for textile printing and dyeing comprises the following specific steps:

the method comprises the following steps: introducing the textile printing and dyeing wastewater flowing out of the workshop into a regulating tank for pH regulation to make the wastewater suitable for living of organisms;

step two: introducing the regulated wastewater into a treatment tank, and treating pollutants in the wastewater by using microorganisms in the treatment tank;

step three: introducing the wastewater after the microbial treatment into a middle sedimentation tank for precipitating most of pollutants;

step four: introducing the upper part of the precipitated wastewater into an air floatation device, aerating in the air floatation device, and floating and discharging small and medium particle pollutants in the wastewater;

step five: the wastewater after aeration treatment meets the discharge requirement and can be directly discharged or recycled;

wherein, the air flotation device in the fourth step comprises an air flotation tank which is communicated with a communicating pipe, the bottom of the air flotation tank is fixedly connected with a plurality of aeration pipes, the right side of the air flotation tank is fixedly connected with a collecting box, the top of the collecting box is lower than the top of the air flotation tank, the inner side wall of the air flotation tank is rotatably connected with a rotating shaft by the right position, the front end of the rotating shaft penetrates through the air flotation tank and is connected with a driving mechanism for driving the rotating shaft to rotate, a foam permeating plate is fixedly connected on the partial outer surface of the rotating shaft positioned in the air flotation tank, the middle part of the foam permeating plate is provided with a foam permeating port, the left end of the foam permeating plate is contacted with the left side wall in the air flotation tank, the bottom of the foam permeating plate is fixedly connected with four first slide bars, the four first slide bars are jointly connected with an air bag, the front and back, the left side wall of the air floatation tank is connected with a withdrawing mechanism which is used for discharging aerated foam by matching with the rotation of the foam penetrating plate;

the recovery mechanism comprises a rectangular baffle and a first chute, the first chute is formed in the right side of the top of the air floatation tank, the rectangular baffle is connected in the first chute in a sliding mode, U-shaped connecting frames are fixedly connected to the right side wall of the rectangular baffle in the front and back directions, racks are fixedly connected to the bottoms of the two U-shaped connecting frames, first gears are fixedly connected to the front end and the back end of the rotating shaft, and the front first gear and the back first gear are respectively meshed with the racks on the right side of the rotating shaft;

when the device works, because pollutant particles in wastewater are carried by aeration of the air flotation tank to the wastewater and are difficult to directly precipitate and remove in the prior art, the pollutant particles in the wastewater are carried by the aeration to float on the top of the wastewater, and when the wastewater is continuously aerated by the air flotation tank, foam floating later can cause damage of foam floating first, so that the pollutant particles in the wastewater carried by the foam floating first fall into the wastewater again, thereby reducing the wastewater treatment efficiency of the air flotation tank, the invention provides a technical scheme for solving the above problems. Waste water enters the air floatation tank, at the moment, the transparent foam plate is positioned on the inner side of the air floatation tank and inclines leftwards, the scraper is positioned at the left end of the polish rod, the air bag is pressed inside the air floatation tank by the transparent foam plate, the rectangular baffle is positioned at a rising position to block the right side of the air floatation tank, the top surface of the waste water introduced into the air floatation tank is positioned at the top of the transparent foam plate, after the waste water is introduced, the communicating pipe is closed, the waste water is not introduced, the aeration pipe at the bottom of the air floatation tank starts to continuously aerate, the waste water is aerated, the foam generated by aeration floats to the top of the waste water to bring very fine particles positioned inside the waste water to float at the top of the waste water, the top surface of the waste water is higher than the transparent foam plate, at the moment, the generated foam is positioned at the top of the transparent foam plate through the transparent foam port, after a period of treatment, when the foam floating at the top of the waste water covers the top of the waste water, the servo motor is started to drive the rotating shaft to rotate, and drive the transparent foam plate to turn over, the foam penetrating plate is slowly separated from the wastewater in the air floatation tank, the foam penetrating plate drives the air bag to move upwards together through the polished rod, the air bag slowly floats out the wastewater, the top surface of the wastewater in the air floatation tank descends due to the lack of the occupied volume of the air bag, the top surface of the wastewater slowly descends below the foam penetrating plate, the foam penetrating plate brings up the foam floating on the top of the wastewater, the separation of water and the foam is realized, the phenomenon that the foam is damaged by the flow of the water to cause partial treatment failure is avoided, when the foam penetrating plate overturns, the scraper moves towards the right side along the polished rod under the action of gravity, scrapes the foam on the top of the foam penetrating plate and discharges the foam into a collecting box on the right side, the foam floating on the top of the wastewater is discharged in time, the foam floating after-up is prevented from damaging the floated foam, the treatment efficiency of the wastewater in the air floatation tank is improved, and when the rotating shaft rotates, two first gears fixedly connected with the rotating shaft are driven to rotate simultaneously, the first gear drives the rack meshed with the first gear to move downwards, the rectangular baffle is driven by the U-shaped connecting frame to slide in the first chute when the foam permeating plate overturns, the top surface of the wastewater is positioned at the bottom of the foam permeating plate at the moment, the wastewater is prevented from overflowing from the top of the rectangular baffle, the rectangular baffle slides in the first chute, the interference of the foam permeating plate in scraping the foam into the collecting box is avoided, when the scraper moves to the rightmost end of the polished rod and completely hangs the foam into the collecting box, the servo motor rotates reversely, the foam permeating plate is driven by the rotating shaft to rotate reversely, the foam permeating plate moves into the air flotation tank again, the rectangular baffle is driven by the first gear and the rack to slowly extend out, a foam discharging port on the right side of the air flotation tank is sealed, meanwhile, the foam permeating plate drives the air bag to enter the wastewater again, the air bag is pressed into the wastewater, the top surface of the wastewater rises again, the foam permeating plate is positioned in the wastewater again, and the foam permeating plate overturns to a position inclined towards the left side, the scraper slides to the left end of the polished rod again along the polished rod under the action of gravity to reset and finish primary foam discharge, when more foams float on the top of the air floatation tank again, the servo motor is started again to drive the foam penetrating plate to continuously discharge the foams floating on the top of the wastewater in time, so that when the wastewater for textile printing and dyeing is treated by aeration, the foam penetrating plate is driven by the servo motor to turn over, the foam penetrating plate is completely positioned in the wastewater, the foams floating by aeration can be completely positioned on the top of the foam penetrating plate, at the moment, the rectangular baffle is positioned at a rising position to stop the wastewater in the air floatation tank, the foam penetrating plate turns over to scrape the foams floating on the top of the wastewater, meanwhile, the air bag is arranged to enable the top surface of the wastewater to descend slowly to the bottom of the foam penetrating plate, when the foam penetrating plate turns to incline to the right, the scraper slides under the action of gravity, and hangs the foams positioned on the top of the foam penetrating plate into the collecting box to be collected, the foam at the top of the wastewater is discharged in time, so that the phenomenon that the foam is damaged due to the foam generated by the subsequent aeration or the wastewater flowing, and pollutant particles brought up in the foam fall into the wastewater again is avoided, and the efficiency of the air floatation tank on wastewater treatment is greatly improved.

As a further scheme of the invention, a second slide bar is fixedly connected on the inner side wall of each foam permeating port through two first connecting blocks, a sealing disc is slidably connected on the outer side wall of each second slide bar, a groove for embedding the two first connecting blocks at the top of the sealing disc is formed in the top of the sealing disc, every two adjacent sealing discs in each row are fixedly connected through a first connecting plate, the bottoms of a plurality of first connecting plates in the same row are fixedly connected with a lifting plate together, the bottom of the foam permeating plate is fixedly connected with four L-shaped supporting plates, the tops of the four L-shaped supporting plates are fixedly connected with first springs, the top ends of the four first springs are fixedly connected with the bottom of the lifting plate, two second connecting blocks are fixedly connected on the front side wall and the rear side wall of the air bag, and each second connecting block is slidably sleeved on the outer surface of the first slide bar, the outer surfaces of the four first sliding rods are fixedly connected with first baffle discs, the bottom of the foam permeating plate is fixedly connected with two support frames, the two support frames are respectively positioned at the left side and the right side of the air bag, guide wheels are rotatably connected on the inner side walls of the two support frames, two pull ropes are fixedly connected on the outer side wall of the air bag, and the outer ends of the pull ropes respectively bypass the guide wheels at the same side and are fixedly connected to the bottom of the first connecting plate; when the device works, the foam penetrating plate is provided with the foam penetrating port at the top, when the foam penetrating plate scrapes foams, partial foams can fall from the foam penetrating port, so that the foams collected at the top of the foam penetrating plate are reduced, the foams removed at each time are reduced, the air bag is connected to the first slide rod in a sliding manner, when the air bag is positioned in wastewater, the air bag floats upwards along the first slide rod due to the buoyancy effect in the water, the two pull ropes are pulled, the pull ropes pull the first connecting plate downwards through the action of the guide wheels, the sealing discs fixedly connected with the first connecting plates are driven to move downwards through the lifting plate, the first spring is compressed, the foam penetrating port is opened, so that foams generated by aeration can float at the top of the wastewater through the foam penetrating port, when the foams at the top of the wastewater are required to be scraped and discharged, the foam penetrating plate is driven to turn over, the air bag is driven to float out of the interior of the wastewater, at the moment, the air bag lacks the buoyancy effect of the air bag, first spring extrusion lifter plate of four compressions, make the lifter plate rebound, the lifter plate has sealed dish rebound through first connecting plate drive, make sealed dish slide in to pass through in the foam, the recess and the butt joint of first connecting block at sealed dish top, make to pass through foam top portion and form the plane, will be in the foam separation that passes through the foam top when passing through the foam top, avoid the foam to fall from passing through the foam mouth, thereby realize when passing through foam slab band and moving the foam and overturn the discharge, utilize the gasbag to break away from behind the waste water, first spring extrusion lifter plate, make the sealed foam mouth that passes through of closing plate, the phenomenon in foam mouth outflow area is followed to the foam of avoiding the area of taking up, make the foam that is passed through foam slab band can be more be in the top that passes through the foam slab band, make it more to pass through the foam slab at every turn over the foam of discharge, the efficiency of processing is improved.

As a further scheme of the invention, a rotating disc is fixedly connected to the outer surface of the part of the rotating shaft located at the rear side of the air floatation tank, a plurality of guide blocks distributed in an annular array are fixedly connected to the surface of the rear side of the rotating disc, an arc-shaped sliding plate is slidably connected to the rear side wall of the air floatation tank, the front side wall of the arc-shaped sliding plate is in contact with the rear side wall of the foam permeating plate, an L-shaped connecting block is fixedly connected to the rear side wall of the air floatation tank, a third sliding rod is fixedly connected to the rear side wall of the arc-shaped sliding plate, the third sliding rod is slidably connected to the inside of the L-shaped connecting block, a guide plate is fixedly connected to the rear end of the third sliding rod, the guide plate is used for acting with the guide blocks, and a second spring is sleeved on the part of the surface of the third sliding rod located between the L-shaped connecting block and the guide plate; when the foam collecting device works, foam can possibly stay at the top of the foam penetrating plate when the scraper scrapes the foam to the right end of the foam penetrating plate every time, the foam is not easy to directly flow into the collecting box, when the foam penetrating plate is driven to turn over by the rotating shaft, the rotating shaft drives the rotating disc to rotate, so that a plurality of guide blocks fixedly connected with the rotating disc rotate, when the guide blocks act on the guide plates, the guide blocks extrude the guide plates to enable the guide plates to move backwards, a third slide rod fixedly connected with the guide plates and an arc-shaped sliding plate are driven to move backwards together, when the guide plates are separated from the guide blocks, the guide plates move forwards under the action of a second spring and fall on the rear side wall of the rotating disc again, the arc-shaped sliding plate moves forwards to impact the foam penetrating plate, so that the foam penetrating plate in turning ceaselessly moves in cooperation with the scraper to scrape the foam, the foam can be quickly collected into the collecting box, and in the turning process of the foam penetrating plate, pass through the foam board all the time with the contact of arc sliding plate, avoid passing through foam board and arc sliding plate dislocation to when realizing passing through the foam board at every turn and scraping the foam and getting rid of, utilize the arc sliding plate around the round trip strike the foam board thoroughly, make the foam that passes through the foam board top can be quick by in the collection collecting box, make the foam that passes through the foam board top can both be got rid of totally at every turn.

As a further scheme of the invention, a second chute is formed on the right side wall of the scraping plate, a rectangular sliding strip is connected on the inner side wall of the second chute in a sliding manner, the front end of the rectangular sliding strip is fixedly connected with a third spring, the front end of the third spring is fixedly connected on the inner side wall of the second chute, and a plurality of foam scraping blocks are fixedly connected on the right side wall of the rectangular sliding strip; the during operation, because the scraper blade is when scraping out the foam, partial foam can laminate on the scraper blade right side wall, be difficult to break away from, there is rectangle sliding strip through sliding connection on the scraper blade right side wall, utilize and pass through the foam board when vibrations, drive the scraper blade vibrations, under scraper blade inertia and third spring interact, make the vibrations of making a round trip around the inside rectangle sliding strip of scraper blade of sliding connection, rectangle sliding strip drives scrapes the foam piece round trip movement around making a round trip, to laminating foam vibrations on the scraper blade right side wall, throw away, flow into in the collecting box, make the foam discharge that will pass through the foam board top that can be more thorough at every turn.

As a further scheme of the invention, the driving mechanism comprises a servo motor, the servo motor is fixedly connected to the front side wall of the air floatation tank, a second gear is fixedly connected to the outer surface of an output shaft of the servo motor, a third gear is fixedly connected to the outer surface of the rotating shaft, and the third gear is in transmission connection with the second gear through a toothed chain; during operation, because the axis of rotation needs to be driven and rotates, drive the rotation of second gear through starting servo motor, the second gear drives the rotation of third gear through the toothed chain to drive and rotate with third gear fixed connection's axis of rotation.

Compared with the prior art, the invention has the beneficial effects that:

1. when the waste water for textile printing and dyeing is treated by aeration, the servo motor is utilized to drive the foam penetrating plate to turn over, the foam penetrating plate is completely positioned in the waste water, so that the aerated and floated foam can be completely positioned at the top of the foam penetrating plate, at the moment, the rectangular baffle is positioned at the rising position to block the waste water in the air floating tank, the foam penetrating plate turns over to scrape the foam floating at the top of the waste water, meanwhile, the air bag is arranged to lower the top surface of the waste water, the rectangular baffle slowly descends to the bottom of the foam penetrating plate, when the foam penetrating plate turns over to incline rightwards, the scraper slides down under the action of gravity, the foam positioned at the top of the foam penetrating plate is hung in the collecting box to be collected, the foam positioned at the top of the waste water is discharged in time, the phenomenon that the foam or the waste water generated by the subsequent aeration flows to damage the foam and cause pollutant particles brought up in the foam to fall into the waste water again is avoided, greatly improving the efficiency of the air floatation tank for treating the wastewater.

2. According to the invention, when the foam permeating plate drives the foam to overturn and discharge, the air bag is utilized to separate from the wastewater, and then the first spring extrudes the lifting plate, so that the sealing plate seals the foam permeating opening, the phenomenon that the carried foam flows out of the foam permeating opening is avoided, more foam can be carried by the foam permeating plate to be positioned at the top of the foam permeating plate, more foam can be discharged by overturning the foam permeating plate every time, and the treatment efficiency is accelerated.

Drawings

FIG. 1 is a flow chart of the wastewater treatment and reuse method for textile printing and dyeing according to the present invention;

FIG. 2 is a first perspective view of the wastewater treatment apparatus of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

FIG. 4 is a second perspective sectional view of the wastewater treatment apparatus of the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 4;

FIG. 6 is a third perspective sectional view of the waste water treatment apparatus of the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 6 at C;

FIG. 8 is a bottom structure view of the foam permeating plate of the present invention;

FIG. 9 is a schematic top view of the foam permeable panel of the present invention;

FIG. 10 is an enlarged view of the structure of FIG. 9 at D;

FIG. 11 is an enlarged view of the structure at E in FIG. 9;

FIG. 12 is a schematic view of the bottom bladder of the foam permeable panel of the present invention;

FIG. 13 is a left side view of the foam permeable panel of the present invention;

fig. 14 is an enlarged view of the structure at F in fig. 13.

In the drawings, the components represented by the respective reference numerals are listed below:

the air flotation tank 1, the communicating pipe 2, the aeration pipe 3, the collection box 4, the rotating shaft 5, the foam permeating plate 6, the foam permeating port 7, the first sliding rod 8, the air bag 9, the polished rod 10, the scraper 11, the rectangular baffle 12, the first chute 13, the U-shaped connecting frame 14, the rack 15, the first gear 16, the first connecting block 17, the second sliding rod 18, the sealing disc 19, the first connecting plate 20, the lifting plate 21, the L-shaped supporting plate 22, the first spring 23, the second connecting block 24, the first blocking disc 25, the supporting frame 26, the guide wheel 27, the pull rope 28, the rotating disc 29, the guide block 30, the arc-shaped sliding plate 31, the L-shaped connecting block 32, the third sliding rod 33, the guide plate 34, the second spring 35, the second chute 36, the rectangular sliding bar 37, the third spring 38, the foam scraping block 39, the servo motor 40, the second gear 41, the third gear 42 and the toothed chain 43.

Detailed Description

Referring to fig. 1-14, the present invention provides a technical solution: a method for treating and recycling wastewater for textile printing and dyeing comprises the following specific steps:

the method comprises the following steps: introducing the textile printing and dyeing wastewater flowing out of the workshop into a regulating tank for pH regulation to make the wastewater suitable for living of organisms;

step two: introducing the regulated wastewater into a treatment tank, and treating pollutants in the wastewater by using microorganisms in the treatment tank;

step three: introducing the wastewater after the microbial treatment into a middle sedimentation tank for precipitating most of pollutants;

step four: introducing the upper part of the precipitated wastewater into an air floatation device, aerating in the air floatation device, and floating and discharging small and medium particle pollutants in the wastewater;

step five: the wastewater after aeration treatment meets the discharge requirement and can be directly discharged or recycled;

wherein, the air flotation device in the fourth step comprises an air flotation tank 1, the air flotation tank 1 is communicated with a communicating pipe 2, the bottom of the air flotation tank 1 is fixedly connected with a plurality of aeration pipes 3, the right side of the air flotation tank 1 is fixedly connected with a collection box 4, the top of the collection box 4 is lower than the top end of the air flotation tank 1, the inner side wall of the air flotation tank 1 is rotatably connected with a rotating shaft 5 close to the right position, the front end of the rotating shaft 5 penetrates through the air flotation tank 1 and is connected with a driving mechanism for driving the rotating shaft 5 to rotate, a foam permeating plate 6 is fixedly connected on the partial outer surface of the inner part of the air flotation tank 1 of the rotating shaft 5, a foam permeating port 7 is arranged in the middle of the foam permeating plate 6, the left end of the foam permeating plate 6 is contacted with the inner left side wall of the air flotation tank 1, the bottom of the foam permeating plate 6 is fixedly connected with four first slide bars 8, the four first slide bars 8 are commonly connected with an air bag 9, polish bars 10 are fixedly connected around the top of the foam permeating plate 6, and two polish bars 10 are commonly connected with a scraper 11 in a sliding way on the outer surface, the left side wall of the air floatation tank 1 is connected with a withdrawing mechanism which is used for discharging aerated foam by matching with the rotation of the foam permeating plate 6;

the retracting mechanism comprises a rectangular baffle plate 12 and a first chute 13, the first chute 13 is arranged on the right side of the top of the air floatation tank 1, the rectangular baffle plate 12 is connected in the first chute 13 in a sliding manner, U-shaped connecting frames 14 are fixedly connected to the right side wall of the rectangular baffle plate 12 in the front and back directions, racks 15 are fixedly connected to the bottoms of the two U-shaped connecting frames 14, first gears 16 are fixedly connected to the front and back ends of the rotating shaft 5, and the front and back first gears 16 are respectively meshed with the racks 15 on the right side of the rotating shaft;

when the wastewater aeration treatment device works, in the prior art, when the wastewater is aerated by the air floatation tank 1 to bring pollutants which are difficult to directly precipitate and remove in the wastewater, the pollutant particles in the wastewater are floated on the top of the wastewater by aeration, and when the wastewater is continuously aerated by the air floatation tank 1, the foam floated later can cause the damage of the foam floated earlier, so that the pollutant particles in the wastewater brought up by the foam floated earlier fall into the wastewater again, thereby reducing the wastewater treatment efficiency of the air floatation tank 1. Waste water enters the air flotation tank 1, at the moment, the permeable foam plate is positioned at the inner side of the air flotation tank 1 and inclines towards the left side, the scraper 11 is positioned at the left end of the polish rod 10, the air bag 9 is pressed inside the air flotation tank 1 by the permeable foam plate 6, the rectangular baffle 12 is positioned at the rising position to block the right side of the air flotation tank 1, the top surface of the waste water introduced into the air flotation tank 1 is positioned at the top of the permeable foam plate 6, after the waste water is introduced, the communicating pipe 2 is closed, the waste water is not introduced, the aeration pipe 3 at the bottom of the air flotation tank 1 starts continuous aeration to aerate the waste water, the foam generated by aeration floats to the top of the waste water to bring very fine particles inside the waste water to float at the top of the waste water, the top surface of the waste water is higher than the permeable foam plate 6, at the moment, the generated foam is positioned at the top of the permeable foam plate 6 through the foam penetrating port 7, after a period of treatment, when the foam floating at the top of the waste water covers the top of the waste water, the servo motor 40 is started, the rotating shaft 5 is driven to rotate to drive the foam penetrating plate 6 to overturn, the foam penetrating plate 6 is slowly separated from the wastewater in the air floatation tank 1, the foam penetrating plate 6 drives the air bag 9 to move upwards together through the polished rod 10, so that the air bag 9 slowly floats out the wastewater, the top surface of the wastewater in the air floatation tank 1 descends due to the lack of the occupied volume of the air bag 9, so that the top surface of the wastewater slowly descends below the foam penetrating plate 6, the foam floating on the top of the wastewater is taken up by the foam penetrating plate 6 to realize the separation of water and foam, the problem that the foam is damaged by the flow of the water to cause partial treatment failure is avoided, when the foam penetrating plate 6 overturns, the scraper 11 moves towards the right side along the polished rod 10 under the action of gravity, the foam at the top of the foam penetrating plate 6 is scraped by the scraper 11 and discharged into the collecting box 4 on the right side, the foam floating on the top of the wastewater is timely discharged, the problem that the subsequent floating foam damages the floated foam, the treatment efficiency of the wastewater in the air floatation tank 1 is improved, and, when the rotating shaft 5 rotates, two first gears 16 fixedly connected with the rotating shaft are driven to rotate simultaneously, the first gears 16 drive the racks 15 engaged with the first gears to move downwards, the rectangular baffle plate 12 is driven by the U-shaped connecting frame to slide in the first chute 13 when the foam permeating plate 6 turns over, and the top surface of the wastewater is positioned at the bottom of the foam permeating plate 6 at the moment, so that the wastewater is prevented from overflowing from the top of the rectangular baffle plate 12, the rectangular baffle plate 12 slides into the first chute 13, the foam is prevented from being scraped into the collecting box 4 by interfering the foam permeating plate 6, when the scraping plate 11 moves to the rightmost end of the polished rod 10, after the foam is completely hung into the collecting box 4, the servo motor 40 rotates reversely, the foam permeating plate 6 is driven by the rotating shaft 5 to rotate reversely, so that the foam permeating plate 6 moves into the air flotation tank 1 again, and similarly, the rectangular baffle plate 12 is driven by the first gears 16 and the racks 15 to slowly extend out, so as to seal the foam discharging port at the right side of the air flotation tank 1, meanwhile, the foam permeating plate 6 drives the air bag 9 to enter the wastewater again, the air bag 9 is pressed into the wastewater to rise the top surface of the wastewater again, the foam permeating plate 6 is located in the wastewater again, when the foam permeating plate 6 is turned to the position inclined towards the left side, the scraper 11 slides to the left end of the polished rod 10 again along the polished rod 10 under the action of gravity to reset to finish primary foam discharge, when more foams float on the top of the air flotation tank 1 again, the servo motor 40 is started again to drive the foam permeating plate 6 to continuously discharge the foams floating on the top of the wastewater in time, so that when the wastewater for textile printing and dyeing is treated by aeration, the foam permeating plate 6 is driven to turn over by the servo motor 40, the foam permeating plate 6 is firstly completely located in the wastewater, the foams floating by aeration can be completely located on the top of the foam permeating plate 6, at the moment, the rectangular baffle 12 is located at the rising position to block the wastewater in the air flotation tank 1, pass through the upset of foam board 6, will float and scrape at the foam at waste water top, and simultaneously, take gasbag 9 to make the waste water top surface descend, rectangle baffle 12 slowly descends to the bottom of passing through foam board 6, pass through when foam board 6 overturns to the right slope, scraper blade 11 landing under the action of gravity, the foam that will be located pass through foam board 6 top is hung and is collected in collecting box 4, in time will be in the foam discharge at waste water top, the foam or the waste water flow that avoid follow-up aeration to produce make the foam damaged, the phenomenon that the pollutant granule that leads to taking up in the foam falls into waste water once more appears, very big improvement air supporting pond 1 is to waste water treatment's efficiency.

As a further scheme of the invention, a second slide bar 18 is fixedly connected on the inner side wall of each foam penetrating port 7 through two first connecting blocks 17, a sealing disc 19 is slidably connected on the outer side wall of each second slide bar 18, a groove for embedding two first connecting blocks 17 at the top of the sealing disc 19 is arranged at the top of the sealing disc 19, two adjacent sealing discs 19 in each row are fixedly connected through a first connecting plate 20, the bottoms of a plurality of first connecting plates 20 in the same row are fixedly connected with a lifting plate 21 together, the bottom of the foam penetrating plate 6 is fixedly connected with four L-shaped supporting plates 22, the tops of the four L-shaped supporting plates 22 are fixedly connected with first springs 23, the top ends of the four first springs 23 are fixedly connected with the bottom of the lifting plate 21, two second connecting blocks 24 are fixedly connected on the front and rear side walls of the air bag 9, each second connecting block 24 is slidably sleeved on the outer surface of, the outer surfaces of the four first sliding rods 8 are fixedly connected with first blocking discs 25, the bottoms of the foam permeating plates 6 are fixedly connected with two supporting frames 26, the two supporting frames 26 are respectively positioned at the left side and the right side of the air bag 9, the inner side walls of the two supporting frames 26 are rotatably connected with guide wheels 27, the outer side wall of the air bag 9 is fixedly connected with two pull ropes 28, and the outer ends of the pull ropes 28 respectively bypass the guide wheels 27 at the same side and are fixedly connected to the bottoms of the first connecting plates 20; when the device works, the foam penetrating port 7 is formed in the top of the foam penetrating plate 6, when foam is scraped by the foam penetrating plate 6, partial foam can fall from the foam penetrating port 7, so that the foam collected at the top of the foam penetrating plate 6 is reduced, the foam removed at each time is reduced, the air bag 9 is connected to the first slide bar 8 in a sliding manner, when the air bag 9 is positioned in waste water, the air bag 9 floats upwards along the first slide bar 8 due to the buoyancy effect in the waste water, the two pull ropes 28 are pulled, the pull ropes 28 pull the first connecting plate 20 downwards through the action of the guide wheels, the sealing discs 19 fixedly connected with the first connecting plates 20 are driven to move downwards through the lifting plates 21, the first springs 23 are compressed, the foam penetrating port 7 is opened, so that the foam generated by aeration can float at the top of the waste water through the foam penetrating port 7, when the foam at the top of the waste water needs to be scraped and discharged, the foam penetrating plate 6 is driven to overturn, and the air bag 9 is driven to, at the moment, the air bag 9 lacks the effect of buoyancy, the four compressed first springs 23 extrude the lifting plate 21 to enable the lifting plate 21 to move upwards, the lifting plate 21 is driven by the first connecting plate 20 to enable the sealing disc 19 to move upwards, the sealing disc 19 slides into the foam penetrating port 7, the groove in the top of the sealing disc 19 is in butt joint with the first connecting block 17 to enable the top of the foam penetrating plate 6 to form a plane, foam on the top of the foam penetrating plate 6 is blocked at the top of the foam penetrating plate 6 to prevent the foam from falling down from the foam penetrating port 7, so that when the foam penetrating plate 6 drives the foam to overturn and discharge, the air bag 9 is used for separating from waste water, the first springs 23 extrude the lifting plate 21 to enable the sealing plate to seal the foam penetrating port 7 to avoid the phenomenon that the foam is discharged from the foam penetrating port 7, more foam taken by the foam penetrating plate 6 can be on the top of the foam penetrating plate 6, and more foam can be discharged by overturning the foam penetrating plate 6 each time, the efficiency of the treatment is improved.

As a further scheme of the invention, a rotating disc 29 is fixedly connected to the outer surface of a part of the rotating shaft 5 located on the rear side of the air flotation tank 1, a plurality of guide blocks 30 distributed in an annular array are fixedly connected to the surface of the rear side of the rotating disc 29, an arc-shaped sliding plate 31 is slidably connected to the rear side wall of the air flotation tank 1, the front side wall of the arc-shaped sliding plate 31 is in contact with the rear side wall of the foam permeating plate 6, an L-shaped connecting block 32 is fixedly connected to the rear side wall of the air flotation tank 1, a third sliding rod 33 is fixedly connected to the rear side wall of the arc-shaped sliding plate 31, the third sliding rod 33 is slidably connected to the inside of the L-shaped connecting block 32, a guide plate 34 is fixedly connected to the rear end of the third sliding rod 33, the guide plate 34 is used for acting with the guide; when the foam transmission device works, foam possibly stays at the top of the foam transmission plate 6 when the scraper 11 scrapes the foam to the right end of the foam transmission plate 6 and is not easy to directly flow into the collecting box 4, the rotating shaft 5 drives the rotating disc 29 to rotate when the rotating shaft 5 drives the foam transmission plate 6 to turn over, so that the guide blocks 30 fixedly connected with the rotating disc 29 rotate, when the guide blocks 30 and the guide plates 34 act, the guide blocks 30 extrude the guide plates 34 to enable the guide plates 34 to move backwards, so as to drive the third slide bars 33 fixedly connected with the guide plates 34 and the arc-shaped sliding plates 31 to move backwards together, when the guide plates 34 and the guide blocks 30 are separated, the guide plates 34 move forwards under the action of the second springs 35 and fall on the rear side wall of the rotating disc 29 again, the arc-shaped sliding plates 31 move forwards to impact the foam transmission plate 6, so that the foam transmission plate 6 in turning over shakes to scrape the foam continuously by matching with the scraper 11, make the foam can be collected in collection box 4 fast, and in the 6 upset in-process of foam board, foam board 6 contacts with arc sliding plate 31 all the time thoroughly, avoid permeating foam board 6 and arc sliding plate 31 dislocation, thereby realize at every turn that foam board 6 scrapes the foam and get rid of, utilize arc sliding plate 31 front and back round trip strike foam board 6 thoroughly, make the foam that permeates 6 tops of foam board can be quick in being collected collection box 4, make the foam that permeates 6 tops of foam board can both be got rid of completely at every turn.

As a further scheme of the invention, a second chute 36 is formed on the right side wall of the scraping plate 11, a rectangular sliding strip 37 is connected on the inner side wall of the second chute 36 in a sliding manner, a third spring 38 is fixedly connected at the front end of the rectangular sliding strip 37, the front end of the third spring 38 is fixedly connected on the inner side wall of the second chute 36, and a plurality of foam scraping blocks 39 are fixedly connected on the right side wall of the rectangular sliding strip 37; the during operation, because scraper blade 11 is when scraping out the foam, partial foam can laminate on scraper blade 11 right side wall, be difficult to break away from, there is rectangle sliding strip 37 through sliding connection on scraper blade 11 right side wall, utilize and pass through foam board 6 when vibrations, drive scraper blade 11 vibrations, under scraper blade 11 inertia and third spring 38 interact, make the vibrations of making a round trip around the inside rectangle sliding strip 37 of scraper blade of sliding connection, rectangle sliding strip 37 drives and scrapes foam piece 39 round trip movement around making a round trip, to laminating foam vibrations on scraper blade 11 right side wall, throw away, flow into in collecting box 4, make the foam discharge that will pass through foam board 6 top more thoroughly at every turn.

As a further scheme of the invention, the driving mechanism comprises a servo motor 40, the servo motor 40 is fixedly connected to the front side wall of the air flotation tank 1, a second gear 41 is fixedly connected to the outer surface of an output shaft of the servo motor 40, a third gear 42 is fixedly connected to the outer surface of the rotating shaft 5, and the third gear 42 is in transmission connection with the second gear 41 through a toothed chain 43; in operation, since the rotating shaft 5 needs to be driven to rotate, the servo motor 40 is started to drive the second gear 41 to rotate, and the second gear 41 drives the third gear 42 to rotate through the toothed chain 43, so as to drive the rotating shaft 5 fixedly connected with the third gear 42 to rotate synchronously.

The working principle is as follows: when the device is used, wastewater after textile printing and dyeing is firstly introduced into a regulating tank for PH regulation, then the wastewater is introduced into a treatment tank, the wastewater is biologically treated by microorganisms, then pollutants in the treated wastewater are statically precipitated, finally the wastewater after the static precipitation is introduced into an air floatation tank 1 for aeration treatment, the wastewater enters the air floatation tank 1, at the moment, a mold permeable foam plate is positioned at the inner side of the air floatation tank 1 and inclines towards the left side, a scraping plate 11 is positioned at the left end of a polished rod 10, an air bag 9 is pressed inside the air floatation tank 1 by the foam permeable plate 6, a rectangular baffle plate 12 is positioned at a rising position to block the right side of the air floatation tank 1, the top surface of the wastewater introduced into the air floatation tank 1 is positioned at the top of the foam permeable plate 6, after the wastewater is introduced, a communicating pipe 2 is closed, the wastewater is not introduced, aeration pipe 3 at the bottom of the air floatation tank 1 starts to continuously aerate, the wastewater is aerated, foams generated by aeration rise towards the top of the wastewater, very fine particles in the wastewater are floated on the top of the wastewater after the bubbles are brought up, the top surface of the wastewater is higher than the foam penetrating plate 6, at the moment, the generated bubbles are positioned on the top of the foam penetrating plate 6 through the foam penetrating port 7, after a period of treatment, when the bubbles floating on the top of the wastewater cover the top of the wastewater, the servo motor 40 is started to drive the rotating shaft 5 to rotate, the foam penetrating plate 6 is driven to overturn, the foam penetrating plate 6 is slowly separated from the wastewater in the air floatation tank 1, the foam penetrating plate 6 drives the air bag 9 to move upwards together through the polish rod 10, so that the air bag 9 slowly floats out of the wastewater, the top surface of the wastewater in the air floatation tank 1 descends due to the lack of the occupied volume of the air bag 9, the top surface of the wastewater slowly descends to the lower part of the foam penetrating plate 6, the foam floating on the top of the wastewater is brought up by the foam penetrating plate 6, the separation of water and the foam is realized, and the failure of partial treatment caused by the foam damage due to the flow of the water is avoided, when the foam permeating plate 6 is turned over, the scraping plate 11 moves to the right side along the polish rod 10 under the action of gravity, the scraping plate 11 scrapes foam at the top of the foam permeating plate 6 and discharges the foam into the collecting box 4 at the right side, the foam floating at the top of the wastewater is discharged in time, the foam floating later is prevented from damaging floated foam, the treatment efficiency of the air floatation tank 1 on the wastewater is improved, in addition, when the rotating shaft 5 rotates, the two first gears 16 fixedly connected with the rotating shaft are driven to rotate simultaneously, the first gears 16 drive the racks 15 meshed with the first gears 16 to move downwards, the rectangular baffle 12 is driven by the U-shaped connecting frame to slide in the first sliding groove 13 when the foam permeating plate 6 is turned over, the top surface of the wastewater is positioned at the bottom of the foam permeating plate 6 at the moment, the wastewater is prevented from overflowing from the top of the rectangular baffle 12, the rectangular baffle 12 slides in the first sliding groove 13, the interference of the foam permeating plate 6 in scraping the collecting box 4 is avoided, and when the scraping plate 11 moves to the rightmost end of the polish rod 10, after the foam is completely hung in the collection box 4, the servo motor 40 rotates reversely, the rotating shaft 5 drives the foam permeating plate 6 to rotate reversely, so that the foam permeating plate 6 moves into the air floatation tank 1 again, and similarly, the rectangular baffle 12 is driven by the first gear 16 and the rack 15 to slowly extend out to seal a foam discharging port at the right side of the air floatation tank 1, meanwhile, the foam permeating plate 6 drives the air bag 9 to enter the waste water again, the air bag 9 is pressed into the waste water, the top surface of the waste water is lifted again, the foam permeating plate 6 is positioned in the waste water again, and when the foam permeating plate 6 is turned to the left side inclined position, the scraper 11 slides to the left end of the polish rod 10 again along the polish rod 10 under the action of gravity to reset, thereby completing one-time foam discharging, when more foams float on the top of the air floatation tank 1 again, the servo motor 40 is started again to drive the foam penetrating plate 6 to continuously discharge the foams floating on the top of the wastewater in time.