1. A sludge dewatering system is characterized in that: comprises a sludge concentration tank (1), a secondary sedimentation tank (2) for receiving supernatant of the sludge concentration tank (1), a medicament tank (3) connected with the secondary sedimentation tank (2), a clear water tank (4) for receiving supernatant of the secondary sedimentation tank (2), a sludge collection tank (5) for receiving precipitates in the sludge concentration tank (1) and the secondary sedimentation tank (2) respectively and a sludge dewatering device (6) connected with the sludge collection tank (5); the sludge dewatering device (6) comprises a rack (61), an upper conveying roller set (63) and a lower conveying roller set (64) which are arranged on the rack (61), a filter cloth conveyor belt (65) which is annularly arranged on the lower conveying roller set (64) and used for conveying sludge, and a pressing conveyor belt (66) which is annularly arranged on the upper conveying roller set (63) and used for pressing sludge on the filter cloth conveyor belt (65); the pressing conveyor belt (66) and the filter cloth conveyor belt (65) are provided with conveying overlapping areas (67), the conveying overlapping areas (67) are arranged in a bent shape, one end of each conveying overlapping area (67) is provided with an inlet end (68), and the other end of each conveying overlapping area is provided with an outlet end (69); the conveying overlapping area (67) is sequentially divided into a pre-pressing dewatering area (671), a low-pressure dewatering area (672) and a high-pressure dewatering area (673); the shape enclosed by the pressing conveyor belt (66) and the filter cloth conveyor belt (65) in the pre-pressing dewatering area (671) is open, and the enclosed area is gradually reduced towards the conveying direction of the filter cloth conveyor belt (65); the clearance between the upper conveying roller group (63) and the lower conveying roller group (64) in the low-pressure dewatering zone (672) is larger than the clearance between the upper conveying roller group (63) and the lower conveying roller group (64) in the high-pressure dewatering zone (673); the surface of an upper conveying roller (641) positioned in the pre-pressing dewatering area (671) in the upper conveying roller group (63) is provided with a double-thread groove (642), and the spiral directions of the double-thread groove (642) respectively extend towards two ends of the upper conveying roller (641).

2. The sludge dewatering system of claim 1, wherein: be provided with mounting bracket (91) on frame (61) be equipped with slide bar (92) on mounting bracket (91) mounting panel (93) are installed to a tail end of slide bar (92) install gyro wheel (94) on mounting panel (93), another end of slide bar (92) slides and wears to locate outside mounting bracket (91) the cover is equipped with compression spring (95) on slide bar (92), compression spring (95) act on between mounting panel (93) and mounting bracket (91), gyro wheel (94) act on through compression spring's (95) effort on the pressing conveyer belt (66) surface of pre-compaction dehydration district (671).

3. The sludge dewatering system of claim 1, wherein: a kickoff plate (7) is arranged at an inlet end (68) of the frame (61) in the conveying overlapping area (67), and the kickoff plate (7) is arranged above the conveying surface of the filter cloth conveying belt (65).

4. The sludge dewatering system of claim 1, wherein: a plurality of groups of brush plates (10) are arranged at an outlet end (69) of the frame (61) in a conveying overlapping area (67), and the brush plates (10) are respectively positioned above the conveying surfaces of the filter cloth conveying belt (65) and the pressing conveying belt (66).

5. The sludge dewatering system of claim 1, wherein: and a cleaning device (12) which is respectively used for cleaning the pressing conveyor belt (66) and the filter cloth conveyor belt (65) is arranged on the frame (61).

6. The sludge dewatering system of claim 5, wherein: cleaning device (12) all including setting up washing pond (121) on frame (61), rotate and install brush rod (122) in washing pond (121) and install in washing pond (121) and be used for driving brush rod (122) pivoted motor outward, clean water basin (4) are connected with washing pond (121) and are used for supplying water to cleaning device (12).

7. The sludge dewatering system of claim 1, wherein: a dryer (8) is arranged on the frame (61), and the dryer (8) is positioned in the low-pressure dewatering zone (672) and the high-pressure dewatering zone (673).

8. The sludge dewatering system of claim 1, wherein: a mud cake collection frame (11) is provided at an outlet end (69) of the conveying overlap region (67).

9. The sludge dewatering system of claim 1, wherein: a filtrate collecting tank (62) is arranged below the sludge dewatering device (6), and the filtrate collecting tank (62) is connected with the sludge concentration tank (1).

10. The sludge dewatering system of claim 1, wherein: and stirring paddles are arranged in the sludge concentration tank (1) and the secondary sedimentation tank (2).

Background

With the rapid development of economy in China, the discharge amount of industrial wastewater and domestic sewage is increasing day by day, the sludge yield is rapidly increased, a large amount of sludge needs to be further treated, and secondary pollution can be caused if the sludge cannot be reasonably treated. The dehydration of the sludge is very critical, and the dehydration directly affects the treatment and resource utilization of the sludge.

Traditional sludge dewatering generally adopts plate and frame filter press to operate, and plate and frame filter press can't realize the continuous dehydration of mud, and plate and frame filter press single squeezes the cycle longer, and the process of unloading is loaded down with trivial details, and later stage clearance is wasted time and energy with the maintenance, and the running efficiency is low.

Disclosure of Invention

The application provides a sludge dewatering system has dehydration and presses the effectual, simple, the convenient effect of clearing up and the treatment effeciency is high of mud.

The application provides a sludge dewatering system adopts following technical scheme:

a sludge dewatering system comprises a sludge concentration tank, a secondary sedimentation tank for receiving supernatant of the sludge concentration tank, a medicament tank connected with the secondary sedimentation tank, a clear water tank for receiving supernatant of the secondary sedimentation tank, a sludge collection tank for receiving precipitates in the sludge concentration tank and the secondary sedimentation tank respectively, and a sludge dewatering device connected with the sludge collection tank; the sludge dewatering device comprises a rack, an upper conveying roller set and a lower conveying roller set which are arranged on the rack, a filter cloth conveying belt which is annularly arranged on the lower conveying roller set and used for conveying sludge, and a pressing conveying belt which is annularly arranged on the upper conveying roller set and used for pressing sludge on the filter cloth conveying belt; the pressing conveyor belt and the filter cloth conveyor belt are provided with conveying overlapping areas, the conveying overlapping areas are arranged in a bent shape, one end of each conveying overlapping area is an inlet end, and the other end of each conveying overlapping area is an outlet end; the conveying overlapping area is sequentially divided into a pre-pressing dehydration area, a low-pressure dehydration area and a high-pressure dehydration area; the shape enclosed by the pressing conveyor belt and the filter cloth conveyor belt in the pre-pressing dehydration area is in an opening shape, and the enclosed area is gradually reduced towards the conveying direction of the filter cloth conveyor belt; the clearance between the upper conveying roller set and the lower conveying roller set in the low-pressure dewatering area is larger than the clearance between the upper conveying roller set and the lower conveying roller set in the high-pressure dewatering area; the surface of an upper conveying roller positioned in the pre-pressing and dewatering area in the upper conveying roller set is provided with a double-thread groove, and the spiral direction of the double-thread groove extends towards the two ends of the upper conveying roller respectively.

Preferably, be provided with the mounting bracket in the frame be equipped with the slide bar on the mounting bracket the mounting panel is installed to a terminal of slide bar install the gyro wheel on the mounting panel, another terminal of slide bar slides and wears to locate outside the mounting bracket the cover is equipped with compression spring on the slide bar, compression spring acts on between mounting panel and the mounting bracket, the gyro wheel acts on through compression spring's effort on the conveyer belt surface that presses of pre-compaction dehydration district.

Preferably, a kickoff plate is arranged at an inlet end of the frame located in the conveying overlapping area, and the kickoff plate is arranged above the conveying surface of the filter cloth conveying belt.

Preferably, a plurality of groups of brush plates are arranged at the outlet end of the frame in the conveying overlapping area, and the brush plates are respectively positioned above the conveying surfaces of the filter cloth conveying belt and the pressing conveying belt.

Preferably, a cleaning device for cleaning the pressing conveyor belt and the filter cloth conveyor belt is arranged on the frame.

Preferably, belt cleaning device all including set up in the frame wash the pond, rotate the brush rod of installing in the washing pond and install and be used for driving brush rod pivoted motor outside wasing the pond, the clean water pond is connected with the washing pond and is used for supplying water to belt cleaning device.

Preferably, a dryer is arranged on the frame, and the dryer is located in the low-pressure dewatering zone and the high-pressure dewatering zone.

Preferably, a cake collecting frame is provided at the outlet end of the conveying overlap zone.

Preferably, a filtrate collecting tank is arranged below the sludge dewatering device, and the filtrate collecting tank is connected with the sludge concentrating tank.

Preferably, the sludge concentration tank and the secondary sedimentation tank are both provided with stirring paddles.

In summary, the present application includes at least one of the following beneficial technical effects:

1. sludge is concentrated and precipitated through a sludge concentration tank, supernatant is discharged into a secondary sedimentation tank and is precipitated again after chemical dosing reaction through a medicament tank, precipitates in the sludge concentration tank and the secondary sedimentation tank are gathered and then discharged into a sludge collection tank, the sludge collection tank discharges the sludge into a filter cloth conveyor belt in a sludge dewatering device, the upper conveying roller set drives a pressing conveyor belt to convey, the pressing conveyor belt covers the filter cloth conveyor belt to form a conveying overlapped area in a curved arrangement so as to squeeze and dewater the sludge, and the sludge sequentially passes through a pre-pressing dewatering area, a low-pressure dewatering area and a high-pressure dewatering area to be dewatered in a staged manner; the sludge is compressed and dewatered by utilizing the opening shape surrounded by the pressing conveyor belt and the filter cloth conveyor belt, the area surrounded by the opening shape is gradually reduced towards the conveying direction of the filter cloth conveyor belt, and then the clearance between the upper conveying roller set and the lower conveying roller set in the low-pressure dewatering area is larger than the clearance between the upper conveying roller set and the lower conveying roller set in the high-pressure dewatering area, so that the sludge is compressed and dewatered again, and the sludge press-dewatering device has the effects of good dewatering and sludge pressing effects, simplicity in discharging, convenience in cleaning and high treatment efficiency;

2. the stirring plate is arranged at the inlet end of the frame, which is positioned in the conveying overlapping area, and is arranged above the conveying surface of the filter cloth conveying belt, so that the sludge is smoothed before prepressing, the smoothness of the sludge discharged on the filter cloth conveying belt by the sludge collecting tank is improved, and the sludge is enabled to move towards two ends during prepressing and dewatering through the double-thread groove arranged on the upper conveying roller, so that the dewatering quality and the dewatering efficiency of the sludge are improved;

3. the roller acts on the outer surface of the pressing conveyor belt of the pre-pressing dehydration area through the acting force of the compression spring, and synchronously compresses and dehydrates the sludge in the conveying overlapping area, so that the shrinking efficiency and the dehydration quality of the sludge are improved;

4. sludge is dewatered and then is provided with a plurality of groups of brush plates through the outlet end arranged in the conveying overlapping area, so that sludge residues on the filter cloth conveying belt and the pressing conveying belt can be further removed conveniently;

5. the filtrate collecting tank is connected with the sludge concentration tank, the sewage in the cleaning tank is connected with the sludge concentration tank to realize the discharge of the cleaned sewage, the sludge dewatering quality and the circulation are improved, and a sludge cake collecting frame is arranged at the outlet end of the conveying overlapping area so as to collect the sludge of the dewatered sludge in the conveying overlapping area;

6. the cleaning devices respectively used for cleaning the pressing conveyor belt and the filter cloth conveyor belt are arranged on the machine frame, and after sludge is dewatered by the filter cloth conveyor belt and the pressing conveyor belt, the sludge passes through the cleaning pool, so that the surfaces of the sludge are cleaned by rotating the brush rods, and the sludge dewatering efficiency is improved;

7. through be provided with the drying-machine in the frame, the drying-machine is located low pressure dehydration district and high pressure dehydration district, is convenient for heat the evaporation moisture of drying during the sludge dewatering.

Drawings

FIG. 1 is a block flow diagram of a sludge dewatering system;

FIG. 2 is a schematic view showing the construction of a sludge dehydrating apparatus in the sludge dehydrating system;

FIG. 3 is a partial structural view of a transfer overlap region in the sludge dehydrating apparatus;

FIG. 4 is a schematic view of the structure of the inlet of the lower transfer roller group in the sludge dewatering device;

fig. 5 is a schematic view of the structure at the pre-press dewatering zone in the sludge dewatering device.

Description of reference numerals: 1. a sludge concentration tank; 2. a secondary sedimentation tank; 3. a medicament pool; 4. a clean water tank; 5. a sludge collection tank; 6. a sludge dewatering device; 61. a frame; 62. a filtrate collection tank; 63. an upper transfer roller group; 64. a lower set of transfer rollers; 641. an upper transfer roller; 642. a double-threaded groove; 65. a filter cloth conveyor belt; 66. pressing the conveyor belt; 67. transmitting the overlapping area; 671. a pre-pressing dehydration zone; 672. a low pressure dewatering zone; 673. a high pressure dewatering zone; 68. an inlet end; 69. an outlet end; 7. a kick-out plate; 8. a dryer; 91. a mounting frame; 92. a slide bar; 93. mounting a plate; 94. a roller; 95. a compression spring; 10. a brush plate; 11. a mud cake collecting frame; 12. a cleaning device; 121. a cleaning tank; 122. a hairbrush stick.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses a sludge dewatering system.

Referring to fig. 1, the sludge dewatering system includes a sludge concentration tank 1, a secondary sedimentation tank 2 for receiving supernatant of the sludge concentration tank 1, a chemical tank 3 connected to the secondary sedimentation tank 2, a clear water tank 4 for receiving supernatant of the secondary sedimentation tank 2, a sludge collection tank 5 for receiving precipitates in the sludge concentration tank 1 and the secondary sedimentation tank 2, respectively, and a sludge dewatering device 6 connected to the sludge collection tank 5, which are connected through a pipe.

Referring to fig. 2, the sludge dewatering device 6 includes a frame 61, a filtrate collecting tank 62 disposed below the frame 61, an upper transfer roller group 63 and a lower transfer roller group 64 provided on the frame 61, a filter cloth conveyor belt 65 disposed annularly on the lower transfer roller group 64 for conveying sludge, and a pressing conveyor belt 66 disposed annularly on the upper transfer roller group 63 for pressing sludge on the filter cloth conveyor belt 65. The press conveyor 66 and the filter cloth conveyor 65 are provided with a transfer overlap area 67, which transfer overlap area 67 is arranged in a curved shape, with one end being provided as an inlet end 68 and the other end being an outlet end 69.

Referring to fig. 2 and 3, the conveying overlap zone 67 is sequentially divided into a pre-pressing dewatering zone 671, a low-pressure dewatering zone 672 and a high-pressure dewatering zone 673; the shape enclosed by the pressing conveyor belt 66 and the filter cloth conveyor belt 65 in the pre-pressing and dewatering zone 671 is open, and the enclosed area is gradually reduced towards the conveying direction of the filter cloth conveyor belt 65; the gap between the upper set of conveying rollers 63 and the lower set of conveying rollers 64 in the low pressure dewatering zone 672 is larger than the gap between the upper set of conveying rollers 63 and the lower set of conveying rollers 64 in the high pressure dewatering zone 673.

Referring to fig. 2 and 4, a kickoff plate 7 is arranged at an inlet end 68 of the frame 61 in the conveying overlapping area 67, the kickoff plate 7 being arranged above the conveying surface of the filter cloth conveyor belt 65; the kick-out plate 7 is V-shaped, and the tip portion is opposite to the conveying direction of the filter cloth conveyor belt 65.

Referring to fig. 2 and 4, in order to improve the smoothness of the sludge discharged from the sludge collecting tank 5 on the filter cloth conveyor belt 65, a double-thread groove 642 is formed on the surface of an upper conveying roller 641 positioned in the pre-pressing dewatering zone 671 and the low-pressure dewatering zone 672 in the upper conveying roller set 63, and the spiral directions of the double-thread groove 642 extend to two ends of the upper conveying roller 641 respectively; so that the sludge in the pre-pressing dehydration area 671 is gradually smoothed and conveyed along with the conveying dehydration period.

Referring to fig. 2 and 5, in order to further improve the sludge dewatering quality, an installation frame 91 is arranged on the frame 61, a sliding rod 92 is arranged on the installation frame 91, an installation plate 93 is arranged at one end of the sliding rod 92, a roller 94 is arranged on the installation plate 93, the other end of the sliding rod 92 is slidably arranged outside the installation frame 91 in a penetrating manner, a compression spring 95 is sleeved on the sliding rod 92, the compression spring 95 acts between the installation plate 93 and the installation frame 91, and the roller 94 acts on the outer surface of the pressing conveyor belt 66 of the pre-pressing dewatering area 671 through the acting force of the compression spring 95; the mounting bracket 91, the slide rod and the roller 94 can be provided in multiple sets.

Referring to fig. 2 and 3, a dryer 8 is disposed on the frame 61, and the dryer 8 is located in the low-pressure dewatering zone 672 and the high-pressure dewatering zone 673, so as to facilitate heating, drying and evaporating moisture during sludge dewatering.

Referring to fig. 2 and 3, a cake collecting frame 11 is provided at the outlet end 69 of the transfer overlap region 67 to facilitate collection of sludge from the dewatered sludge in the transfer overlap region 67.

Referring to fig. 2 and 3, a plurality of sets of brush plates 10 are arranged at an outlet end 69 of the frame 61 in the conveying overlapping area 67, and the brush plates 10 are respectively positioned above the conveying surfaces of the filter cloth conveyor belt 65 and the pressing conveyor belt 66; the sludge residues on the filter cloth conveyor belt 65 and the pressing conveyor belt 66 are further removed conveniently by a plurality of groups of brush plates 10.

Referring to fig. 2, in order to improve sludge dewatering quality, a cleaning device 12 for cleaning a press conveyor 66 and a filter cloth conveyor 65, respectively, is provided on a frame 61.

Referring to fig. 2, the cleaning devices 12 each include a cleaning tank 121 disposed on the frame 61, a brush roller 122 rotatably mounted in the cleaning tank 121, and a motor mounted outside the cleaning tank 121 for driving the brush roller 122 to rotate, and the clean water tank 4 is connected to the cleaning tank 121 for supplying water to the cleaning devices 12. After the sludge is dewatered, the filter cloth conveying belt 65 and the pressing conveying belt pass through the cleaning tank 121, so that the brush roller 122 rotates to clean the surface of the sludge, and the sludge dewatering efficiency is improved.

Referring to fig. 2, in order to improve the sludge dewatering quality and the sludge circulation, the filtrate collecting tank 62 is connected to the sludge concentration tank 1, and the sewage in the cleaning tank 121 is connected to the sludge concentration tank 1 to realize the discharge of the cleaned sewage; and the sludge concentration tank 1 and the secondary sedimentation tank 2 are both provided with stirring paddles so as to improve the uniform mixing and sedimentation in the sludge concentration tank 1 and the secondary sedimentation tank 2.

The implementation principle is as follows: firstly, sludge is concentrated and precipitated through a sludge concentration tank 1, supernatant is discharged into a secondary sedimentation tank 2 and is precipitated again after chemical adding reaction through a medicament tank 3, precipitates in the sludge concentration tank 1 and the secondary sedimentation tank 2 are converged and then discharged into a sludge collection tank 5, and supernatant in the secondary sedimentation tank 2 is discharged into a clean water tank 4 for later use.

Secondly, the sludge is discharged into a filter cloth conveyor belt 65 in the sludge dewatering device 6 by the sludge collection tank 5, the filter cloth conveyor belt 65 is used for conveying the sludge through a lower conveyor roller group 64, the upper conveyor roller group 63 drives a pressing conveyor belt 66 to convey, the pressing conveyor belt 66 covers the filter cloth conveyor belt 65 to form a conveying overlapping area 67 which is arranged in a bent shape to squeeze and dewater the sludge, and the sludge sequentially passes through a pre-pressing dewatering area 671, a low-pressure dewatering area 672 and a high-pressure dewatering area 673 to be dewatered in a staged manner; when the sludge is located in the pre-pressing dehydration zone 671, the shape enclosed by the pressing conveyor belt 66 and the filter cloth conveyor belt 65 is in an open shape, the enclosed area is gradually reduced towards the conveying direction of the filter cloth conveyor belt 65, the sludge is compressed and dehydrated, and meanwhile, the sludge is displaced towards two ends through the double-thread groove 642 arranged on the upper conveying roller 641; furthermore, the roller 94 on the slide rod acts on the outer surface of the pressing conveyor belt 66 of the pre-pressing dewatering area 671 through the acting force of the compression spring 95, so that the sludge conveyed to the overlapping area 67 is synchronously compressed and dewatered, and the shrinking efficiency and dewatering quality are improved.

Finally, the sludge passes through the low-pressure dehydration zone 672, the gap between the upper conveying roller group 63 and the lower conveying roller group 64 is larger than the gap between the upper conveying roller group 63 and the lower conveying roller group 64 in the high-pressure dehydration zone 673, the sludge is compressed and dehydrated again, and finally a sludge cake collecting frame 11 is arranged at the outlet end 69 of the conveying overlapping zone 67 so as to be convenient for collecting the sludge of the sludge dehydrated in the conveying overlapping zone 67; the filtrate collecting tank 62 is connected with the sludge concentration tank 1, and the sewage in the cleaning tank 121 is connected with the sludge concentration tank 1 to realize the discharge of the cleaned sewage, thereby improving the sludge dewatering quality and the sludge cyclicity.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.