1. The magnetic coagulation sludge treatment process is characterized by comprising the following steps of:

s1, pumping the sludge in the sludge tank into a coagulation tank through a water pump;

step S2, adding PAM and a magnetic medium into the coagulation basin, and then stirring the PAM, the magnetic medium and sludge to generate flocculation reaction so as to realize sludge-water separation;

s3, enabling the mixture after mud-water separation to enter a sludge thickener, intercepting floccules by a filter screen of the sludge thickener, enabling the floccules to enter a mud bucket of the sludge thickener, and discharging filtrate through the filter screen of the sludge thickener;

s4, conveying the mixture dehydrated in the sludge concentrator into a deflocculating machine, and separating the magnetic medium in the mixture from the mud under the action of the deflocculating machine;

s5, conveying the mixture in the deflocculating machine to a magnetic separator, separating the magnetic medium from the sludge through the magnetic separator, and recovering the magnetic medium for a coagulation tank through the magnetic separator;

and step S6, the magnetic separator conveys the separated sludge into a sludge press, and the sludge is pressed and dried to be used as organic fertilizer or power generation raw materials.

2. The magnetic coagulation sludge treatment process according to claim 1, characterized in that: the step S3 further includes: and the mixture after mud-water separation enters a sludge thickener, the floccules are intercepted by a filter screen of the sludge thickener and enter a mud bucket of the sludge thickener, and the filtrate is discharged through the filter screen of the sludge thickener, discharged into an adjusting tank of a sewage treatment system and then enters the sewage treatment system for treatment through the adjusting tank.

3. The magnetic coagulation sludge treatment process according to claim 1, characterized in that: the deflocculating machine in the step S4 comprises two supporting feet arranged left and right, deflocculating machine bodies are erected on the two supporting feet, mounting flanges are arranged at the left end and the right end of each deflocculating machine body, a deflocculating main shaft is arranged in each deflocculating machine body through the mounting flanges, the left end and the right end of each deflocculating main shaft penetrate through the mounting flanges and extend to the outer sides of the mounting flanges, sealing rubber is connected to the outer sides of the mounting flanges, the left end of each deflocculating main shaft is connected with a connecting flange, and the right side of the connecting flange is connected with a driving motor for driving the deflocculating main shaft; the right end of the cotton fluffing main shaft is connected with a bearing with a seat.

4. The magnetic coagulation sludge treatment process according to claim 3, characterized in that: the main shaft of separating wadding includes the main shaft, both ends all are provided with the flywheel about on the main shaft, are provided with the shunt on the main shaft, just the shunt sets up between two flywheels about.

5. The magnetic coagulation sludge treatment process according to claim 4, characterized in that: the flywheel comprises a flying disc, and blades are arranged on the flying disc in an annular array by taking the circle center of the flying disc as the center.

6. The magnetic coagulation sludge treatment process according to claim 3, characterized in that: discharging pipes are arranged at the left end and the right end of the floc removing machine body, and a feeding pipe is arranged in the middle of the lower surface of the floc removing machine body.

7. The magnetic coagulation sludge treatment process according to claim 1, characterized in that: the coagulation tank in the step S1 comprises a feeding tank and a stirring reaction tank, a partition plate is arranged in the feeding tank, the feeding tank is divided into a PAM feeding tank and a magnetic medium feeding tank through the partition plate, the stirring reaction tank is communicated with the magnetic medium feeding tank, the upper end of the partition plate is provided with an overflow port for overflowing liquid in the PAM feeding tank to the magnetic medium feeding tank, the lower surface of the PAM feeding tank is provided with a sludge feed port, a stirrer is arranged on the stirring reaction tank, and the right side surface of the stirring reaction tank is provided with a liquid outlet pipe connected with a sludge concentrator.

8. The magnetic coagulation sludge treatment process according to claim 1, characterized in that: the magnetic separator in step S5 includes a support, be provided with the magnetic separator organism on the support, the magnetic separator organism with both ends are connected through the connecting plate around the machine of separating out, the both ends discharging pipe is through the ring flange with the inlet pipe of magnetic separator organism is connected around the machine of separating out, be provided with the magnetic drum on the magnetic separator organism, support left surface upper end be provided with the magnetic medium export matched with magnetic medium recovery fill of magnetic drum, the support lower surface is provided with mud recovery fill, seted up on the support with mud recovery fill' S entry matched with discharge gate, the magnetic drum lower extreme passes the discharge gate embedding in the mud recovery fill, magnetic separator organism side is provided with and is used for driving the magnetic separation speed reducer of magnetic drum pivoted.

9. The magnetic coagulation sludge treatment process according to claim 1, characterized in that: the sludge thickener in the step S3 comprises a frame and a rotary drum body, wherein a support frame is arranged at the right end of the frame, a filtrate hopper is arranged on the support frame, the rotary drum body is erected on the support frame, the rotary drum body is arranged on the rotary drum body, a filter opening of the rotary drum is matched with an inlet of the filtrate hopper, an inlet of the rotary drum body is connected with an outlet of the coagulation tank through a conveying pipe, a scraping mechanism is arranged at an outlet of the rotary drum, and a sludge hopper matched with the scraping mechanism is arranged at an outlet of the rotary drum.

10. The magnetic coagulation sludge treatment process according to claim 9, characterized in that: the scraping mechanism comprises a fixed seat, the fixed seat is fixedly arranged on the outlet of the rotary drum, a fixed rod is connected onto the fixed seat, a telescopic cylinder is arranged at the tail end of the fixed rod, a moving block is arranged at the tail end of a telescopic rod of the telescopic cylinder, the moving block is erected on the edge of the sludge bucket, and a sludge scraping plate used for scraping sludge on the rotary drum into the sludge bucket is hinged to the moving block.

Background

The process of sewage treatment mainly decomposes the polluted sewage in the sewage into settleable sludge, and the sludge is disposed, thereby purifying the water quality. Therefore, any sewage treatment has a large amount of sludge generated. Sludge treatment is a key link of sewage treatment. Commonly used sludge treatment facilities include: centrifuge, belt filter press, plate and frame filter press, stack spiral shell machine, etc. The sludge treatment equipment is more, but has advantages and disadvantages. The centrifuge is used for separating the sludge from the water through high-speed spin-drying. The noise generated by the device is large, the water content of the sludge is high, and the failure rate of the device is high. The belt filter press realizes mud-water separation by the extrusion of a filter belt. The phenomena of filter belt deviation, mud leakage and the like are common and are difficult to accept. The automatic degree of the screw stacking machine is higher, automatic continuous production can be realized, and the failure rate is low. But the water content of the discharged mud is higher, the treatment efficiency is low, and the equipment investment is also large. The plate-and-frame filter press can be roughly divided into two types of normal pressure and high pressure, the water content of the sludge discharged at the normal pressure is unstable and is related to the property of the sludge, and the viscosity and the oily sludge are not easy to treat. The high-pressure plate-and-frame filter press has low sludge water content and high automation degree, but the equipment has higher power, high energy consumption and complex process. The investment cost is high. Therefore, the sludge treatment becomes a difficult point in the industry, and mainly lies in the treatment process.

Disclosure of Invention

In view of the above, the present invention provides a magnetic coagulation sludge treatment process capable of treating sludge by magnetic coagulation technology.

The invention is realized by adopting the following method: a magnetic coagulation sludge treatment process comprises the following steps:

s1, pumping the sludge in the sludge tank into a coagulation tank through a water pump;

step S2, adding PAM and a magnetic medium into the coagulation basin, and then stirring the PAM, the magnetic medium and sludge to generate flocculation reaction so as to realize sludge-water separation;

s3, enabling the mixture after mud-water separation to enter a sludge thickener, intercepting floccules by a filter screen of the sludge thickener, enabling the floccules to enter a mud bucket of the sludge thickener, and discharging filtrate through the filter screen of the sludge thickener;

s4, conveying the mixture dehydrated in the sludge concentrator into a deflocculating machine, and separating the magnetic medium in the mixture from the mud under the action of the deflocculating machine;

s5, conveying the mixture in the deflocculating machine to a magnetic separator, separating the magnetic medium from the sludge through the magnetic separator, and recovering the magnetic medium for a coagulation tank through the magnetic separator;

and step S6, the magnetic separator conveys the separated sludge into a sludge press, and the sludge is pressed and dried to be used as organic fertilizer or power generation raw materials.

Further, the step S3 is further specifically: and the mixture after mud-water separation enters a sludge thickener, the floccules are intercepted by a filter screen of the sludge thickener and enter a mud bucket of the sludge thickener, and the filtrate is discharged through the filter screen of the sludge thickener, discharged into an adjusting tank of a sewage treatment system and then enters the sewage treatment system for treatment through the adjusting tank.

Further, the deflocculating machine in the step S4 comprises two support legs arranged left and right, a deflocculating machine body is erected on the two support legs, mounting flanges are arranged at the left end and the right end of the deflocculating machine body, a deflocculating main shaft is arranged in the deflocculating machine body through the mounting flanges, the left end and the right end of the deflocculating main shaft penetrate through the mounting flanges and extend to the outside of the mounting flanges, sealing rubber is connected to the outside of the mounting flanges, the left end of the deflocculating main shaft is connected with a connecting flange, and the right side of the connecting flange is connected with a driving motor for driving the deflocculating main shaft; the right end of the cotton fluffing main shaft is connected with a bearing with a seat.

Further, the main shaft of separating wadding includes the main shaft, both ends all are provided with the flywheel about on the main shaft, are provided with the shunt on the main shaft, just the shunt sets up between two flywheels about.

Furthermore, the flywheel comprises a flying disc, and blades are arranged on the flying disc in an annular array by taking the circle center of the flying disc as the center.

Furthermore, discharge pipes are arranged at the left end and the right end of the floc removing machine body, and a feed pipe is arranged in the middle of the lower surface of the floc removing machine body.

Further, the coagulation tank in the step S1 includes throwing a pond and a stirring reaction tank, be provided with a baffle in the throwing pond, it is separated into PAM through the baffle to throw the pond and throw the pond with the magnetic medium, the stirring reaction tank with the magnetic medium is thrown the pond and is linked together, the baffle upper end is offered and is used for throwing the liquid overflow in the pond with PAM to the overflow mouth in the magnetic medium is thrown the pond, PAM is thrown the pond lower surface and is provided with the mud feed inlet, be provided with the agitator on the stirring reaction tank, stirring reaction tank right flank is provided with the drain pipe of being connected with the sludge concentrator.

Further, the magnetic separator in step S5 includes a support, be provided with the magnetic separator organism on the support, the magnetic separator organism with both ends are connected through the connecting plate around the machine of separating out, both ends discharging pipe is through the ring flange with the inlet pipe of magnetic separator organism is connected around the machine of separating out, be provided with the magnetic drum on the magnetic separator organism, support left surface upper end be provided with the magnetic medium export matched with magnetic medium recovery fill of magnetic drum, the support lower surface is provided with mud recovery fill, seted up on the support with mud recovery fill' S entry matched with discharge gate, the magnetic drum lower extreme passes the discharge gate embedding in the mud recovery fill, magnetic separator organism side is provided with and is used for driving magnetic drum pivoted magnetic separation speed reducer.

Further, the sludge concentrator in the step S3 includes a frame and a drum body, a support frame is arranged at the right end of the frame, a filtrate hopper is arranged on the support frame, the drum body is erected on the support frame, a drum is arranged on the drum body, a filter opening of the drum is matched with an inlet of the filtrate hopper, an inlet of the drum body is connected with an outlet of the coagulation tank through a conveying pipe, a scraping mechanism is arranged at an outlet of the drum, and a sludge hopper matched with the scraping mechanism is arranged at an outlet of the drum.

Further, the scraping mechanism comprises a fixed seat, the fixed seat is fixedly arranged on the outlet of the rotary drum, a fixed rod is connected to the fixed seat, a telescopic cylinder is arranged at the tail end of the fixed rod, a moving block is arranged at the tail end of a telescopic rod of the telescopic cylinder, the moving block is erected on the edge of the sludge hopper, and a sludge scraping plate used for scraping sludge on the rotary drum into the sludge hopper is hinged to the moving block.

The invention has the beneficial effects that: the invention is used for sludge treatment through magnetic coagulation, quickly generates sludge and water separation, has large floc and good effect, and creates conditions for solid-liquid separation; the sludge thickener is used for sludge treatment, has high efficiency and clear filtrate. Sludge is quickly concentrated, and the amount of sludge needing to be squeezed is reduced; the magnetic medium is recycled, so that the treatment cost is reduced; the low-energy consumption and rapid treatment of the sludge are realized; the system realizes automatic operation; the failure rate of the equipment is low, and the service life is long.

Drawings

FIG. 1 is a schematic process flow diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

FIG. 3 is a schematic structural diagram of the deflaker.

FIG. 4 is a cross-sectional view of the deflaker.

Fig. 5 is a schematic structural view of the deflocculating main shaft.

Fig. 6 is a schematic structural diagram of the flywheel.

Fig. 7 is a schematic structural diagram of the coagulation tank.

FIG. 8 is a schematic view of the magnetic separator.

Fig. 9 is a schematic structural view of the sludge thickener.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Referring to fig. 1 and 2, the present invention provides a magnetic coagulation sludge treatment process, including the following steps:

s1, pumping the sludge in the sludge tank into the coagulation tank 1 through a water pump;

step S2, adding PAM and a magnetic medium into the coagulation tank 1, and then stirring the PAM, the magnetic medium and sludge to generate flocculation reaction so as to realize sludge-water separation;

s3, enabling the mixture after mud-water separation to enter the sludge thickener 2, intercepting floccules by a filter screen of the sludge thickener 2, enabling the floccules to enter a mud bucket of the sludge thickener 2, and discharging filtrate through the filter screen of the sludge thickener 2;

s4, conveying the mixture dehydrated in the sludge concentrator 2 into a deflocculating machine 3, and separating the magnetic medium in the mixture from the sludge under the action of the deflocculating machine 3;

step S5, conveying the mixture in the deflocculating machine 3 into a magnetic separator 4, separating the magnetic medium from the sludge through the magnetic separator 4, and recovering the magnetic medium for the coagulation tank 1 through the magnetic separator 4;

and S6, conveying the separated sludge into a sludge presser 5 by the magnetic separator 4, and pressing and drying the sludge to be used as an organic fertilizer or a power generation raw material.

The step S3 further includes: and the mixture after mud-water separation enters a sludge thickener, the floccules are intercepted by a filter screen of the sludge thickener and enter a mud bucket of the sludge thickener, and the filtrate is discharged through the filter screen of the sludge thickener, discharged into an adjusting tank of a sewage treatment system and then enters the sewage treatment system for treatment through the adjusting tank.

The magnetic coagulation is to add a flocculating agent into the sewage and simultaneously add a magnetic medium to generate rapid precipitation, thereby realizing sludge-water separation. A commonly used flocculant is Polyacrylamide (PAM), which has the main function of agglomerating sludge to produce sludge-water separation. Magnetic media generally refers to soft magnetic micron-sized metal particles with stable chemistry. The effect of the flocculant is to accelerate flocculation and precipitation and ensure better precipitation effect. The magnetic coagulation technology is widely applied to the treatment of the black and odorous water body, and has ideal effect. The main technological processes include coagulation, flocculation, precipitation, deflocculation, magnetic powder recovery and reuse, etc. The magnetic coagulation has the characteristics of rapid precipitation, large floc and the like, and can be used in the sludge treatment process.

The sludge treatment in the invention is mainly to pump out the precipitated sludge generated in the sewage treatment process by a pump and treat the sludge by equipment. However, the sludge content of the sludge pumped by the water pump is low, and is usually between 1% and 5%. The conventional method is that the pumped sludge directly enters sludge treatment equipment for treatment. It is not desirable from the viewpoint of processing efficiency, processing cost, etc. The scheme utilizes the characteristics of magnetic coagulation to firstly concentrate sludge, then separate sludge from water, squeeze and squeeze, recycle magnetic powder and other technological processes. The sludge treatment effect is achieved by using simple equipment. Improves the sludge treatment efficiency and saves the treatment cost.

Referring to fig. 3 and fig. 6, in an embodiment of the present invention, the deflocculating machine 3 in step S4 includes two supporting legs 31 disposed on the left and right sides, a deflocculating machine body 32 is erected on the two supporting legs 31, mounting flanges 33 are disposed at the left and right ends of the deflocculating machine body 32, a deflocculating main shaft 34 is mounted in the deflocculating machine body 32 via the mounting flanges 33, the left and right ends of the deflocculating main shaft 34 pass through the mounting flanges 33 and extend to the outside of the mounting flanges 33, a sealing member 6 is connected to the outside of the mounting flanges 33, a connecting flange 35 is connected to the left end of the deflocculating main shaft 34, and a driving motor 36 for driving the deflocculating main shaft 34 is connected to the right side of the connecting flange 35; the right end of the flocculation-removing main shaft 34 is connected with a bearing with a seat 37. So that the driving motor 36 can drive the flocculation-removing main shaft 34 to rotate by turning on the driving motor 36, and the materials in the flocculation-removing machine body 32 are cut and crushed, thereby realizing the separation of the magnetic medium and the sludge.

Referring to fig. 4 and 5, in an embodiment of the present invention, the main deflocculating shaft 34 includes a main shaft 38, flywheels 39 are disposed on both left and right ends of the main shaft 38, a flow divider 30 is disposed on the main shaft 38, and the flow divider 30 is disposed between the left and right flywheels 39. The flywheel 39 can be driven to rotate through rotation of the main shaft 38, so that materials can be cut, and the materials can be left and right shunted through the action of the shunt 30, so that the materials can be better cut.

With continued reference to fig. 6, in one embodiment of the present invention, the flywheel 39 includes a flying disc 391, and the flying disc 391 is provided with blades 392 in an annular array centered on the center of the flying disc 391. So that the material can be cut and pulverized by the action of the blades 392.

Referring to fig. 3, in an embodiment of the present invention, the sealing element 6 is a sealing rubber. For sealing mounting flange 33 and deflocculating main shaft 34.

Referring to fig. 3 and 4, in an embodiment of the present invention, the discharging pipes 7 are disposed on both left and right ends of the deflocculating machine body 32, and the feeding pipe 71 is disposed in the middle of the lower surface of the deflocculating machine body 32. So that the deflocculated material can be discharged by the action of the discharge pipe 7 and the flocculent mixture is conveyed into the deflocculating machine body 32 through the feed pipe 71.

Referring to fig. 7, in an embodiment of the present invention, the coagulation tank 1 in step S1 includes a feeding tank 11 and a stirring reaction tank 12, a partition plate 13 is disposed in the feeding tank 11, the feeding tank 11 is divided into a PAM feeding tank 14 and a magnetic medium feeding tank 15 by the partition plate 13, the stirring reaction tank 12 is communicated with the magnetic medium feeding tank 15, an overflow port 16 for overflowing liquid in the PAM feeding tank 14 into the magnetic medium feeding tank 15 is disposed at an upper end of the partition plate 13, a sludge feeding port 17 is disposed on a lower surface of the PAM feeding tank 14, a stirrer 18 is disposed on the stirring reaction tank 12, and a liquid outlet pipe 19 connected to the sludge concentrator 2 is disposed on a right side surface of the stirring reaction tank 12. Coagulant (PAM) and magnetic medium are added into the adding tank 11, and flocculation reaction is generated under the condition of full stirring in the stirring reaction tank 12, so that sludge-water separation is realized.

Referring to fig. 8, in an embodiment of the present invention, the magnetic separator 4 in step S5 includes a support 41, the bracket 41 is provided with a magnetic separator body 42, the magnetic separator body 42 is connected with the front end and the rear end of the floc remover 3 through connecting plates 43, discharge pipes at the front end and the rear end of the deflocculating machine 3 are connected with a feed pipe of the magnetic separator body 42 through a flange plate 44, a magnetic drum 45 is arranged on the magnetic separator body 42, a magnetic medium recovery bucket 46 matched with a magnetic medium outlet of the magnetic drum 45 is arranged at the upper end of the left side surface of the bracket 41, a sludge recovery hopper 47 is arranged on the lower surface of the bracket 41, a discharge hole (not shown) matched with an inlet of the sludge recovery hopper 47 is arranged on the bracket 41, the lower end of the magnetic drum 45 penetrates through the discharge hole and is embedded into the sludge recovery hopper 47, and a magnetic separation speed reducer 48 for driving the magnetic drum 45 to rotate is arranged on the side face of the magnetic separator body 42. The sludge and the magnetic medium are separated by conveying the mixed flocculate of the magnetic medium and the sludge into the flocculation separator 3, the flocculated mixture enters the magnetic separator body 42, then the magnetic separation is realized under the action of the magnetic drum 45, the magnetic drum 45 conveys the magnetic medium to the magnetic medium recovery hopper 46, and then the sludge is conveyed to the sludge recovery hopper 47, so that the recovery effect of the magnetic medium is realized.

Referring to fig. 9, in an embodiment of the present invention, the sludge thickener 2 in step S3 includes a frame 21 and a drum body 22, a support frame 23 is disposed at the right end of the frame 21, a filtrate hopper 24 is disposed on the support frame 23, the drum body 22 is erected on the support frame 23, a drum 25 is disposed on the drum body 22, a filter opening of the drum 25 is matched with an inlet of the filtrate hopper 24, an inlet of the drum body 22 is connected with an outlet of the coagulation basin 1 through a delivery pipe 26, a scraping mechanism 8 is disposed at an outlet of the drum 25, and a sludge hopper 27 matched with the scraping mechanism 8 is disposed at an outlet of the drum 25. So that the worker conveys the mixture stirred in the coagulation tank 1 into the rotary drum body 22 through the conveying pipe 26, filters the mixture through the rotary drum body 22, and scrapes the sludge on the rotary drum 25 into the sludge hopper 27 through the scraping mechanism 8.

Referring to fig. 9, in an embodiment of the present invention, the scraping mechanism 8 includes a fixing seat 81, the fixing seat 81 is fixedly disposed at an outlet of the rotating drum 25, the fixing seat 81 is connected with a fixing rod 82, a telescopic cylinder 83 is disposed at a tail end of the fixing rod 82, a moving block 84 is disposed at a tail end of a telescopic rod of the telescopic cylinder 83, the moving block 84 is erected at an edge of the sludge bucket 27, and a sludge scraping plate 85 for scraping sludge on the rotating drum 25 into the sludge bucket 27 is hinged to the moving block 84. The effect through telescopic cylinder 83 is made to make, can drive the movable block 84 and stretch out and draw back to make the mud scraping plate 85 can suit with rotary drum 25, be convenient for scrape the mud on the rotary drum 25 to the sludge bucket 27 in through the effect of mud scraping plate 85.

The flow divider, the driving motor, the stirrer, the sludge concentrator, the magnetic separator and the sludge press in the present invention are all the prior art, and those skilled in the art can clearly understand that the detailed description is not provided herein.

In a word, the mud in sludge impoundment is through the water pump, with mud pump to thoughtlessly congeal the pond, PAM passes through the measuring pump and goes into thoughtlessly congeals the pond, and magnetic medium adds the whitewashed device through automatic and adds and thoughtlessly congeals the pond, is equipped with agitating unit on the thoughtlessly congeals PAM, magnetic medium thing and mud fully stirs, makes it produce flocculation reaction, realizes mud-water separation, and the mixture after mud-water separation gets into sludge thickening machine, and the floccule is intercepted by the filter screen, gets into the mud fill, and filtrating is then through the filter screen, discharges to sewage treatment system's equalizing basin from the outlet. The filtrate after magnetic coagulation treatment is clear and has low mud content, and the filtrate enters the regulating tank and then enters the sewage treatment system for treatment. Floccules filtered out by the fine grid are a mixture of mud and a magnetic medium, the magnetic medium is a useful substance in the treatment process and needs to be recycled, the mud is a substance to be treated, in order to recycle the magnetic medium, firstly, flocculation is decomposed, the magnetic medium is separated from the mud by a flocculation decomposing machine, the magnetic medium of a magnetic separating machine is separated from the mud, the magnetic medium is recycled in a treatment system, and the mud is squeezed and dried to be used as an organic fertilizer raw material or a power generation raw material to be transported outside.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.