Sludge dewatering device

Abstract

The utility model provides a sludge dewatering device which comprises a shell, a first filter belt and a second filter belt are arranged in the shell, a first moving mechanism is arranged in the surrounding middle of the first filter belt, the bottom of the first moving mechanism is connected with a first electric push rod, the telescopic end of the first electric push rod is connected with a first U-shaped plate, and first rotating shafts are arranged at the two ends of the first U-shaped plate; the second filter belt is located below the first filter belt, a second moving mechanism is arranged in the surrounding middle of the second filter belt, the top of the second moving mechanism is connected with a second electric push rod, the telescopic end of the second electric push rod is connected with a second U-shaped plate, and second rotating shafts are arranged at the two ends of the second U-shaped plate; under the driving of the moving mechanism, the first roller and the second roller extrude the sludge and then slide towards one side of the sludge discharge groove, so that the extrusion force of the filter belt on the sludge is increased, the space for accommodating the sludge in the middle of the filter belt is reduced, and the sludge dewatering effect is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to a sludge dewatering device. Background Art

[0002] A large amount of sludge is often deposited at the bottom of some rivers, pools and sewage treatment plants. The sludge contains a large amount of water. In order to facilitate environmental protection treatment of the sludge, it is necessary to dehydrate the sludge to reduce the volume and weight of the sludge. In the prior art, sludge dehydration generally adopts a mechanical equipment dehydration process. The moisture content of the sludge treated by mechanical equipment can generally be reduced from about 95% to about 50%, and the interstitial water and capillary water in the sludge are removed. Its volume can be reduced to about 15% of the original volume, which is conducive to movement and environmental protection treatment. The working principle of a general sludge dehydration device is to use the pressure difference on both sides of the filter medium of a porous material as a driving force, forcing the water in the sludge to pass through the filter medium, and the solid particles are retained on one side of the medium, thereby achieving the purpose of dehydration. With the continuous development of environmental protection technology, the sludge dewatering process now not only relies on mechanical equipment for dehydration, but also adds chemical methods, such as adding sludge dehydrating agent to the sludge. Sludge dehydrating agent is a kind of agent that can change the surface structure of sludge, reduce the solid surface load of sludge, and reduce the specific surface area of ​​sludge, so as to achieve rapid and deep sludge dehydration. In the prior art, the problems existing in the sludge dewatering device are as follows: the belt-type sludge dewatering device relies on the tension of the filter belt itself to form the squeezing and shearing force on the sludge layer to filter out the water in the sludge layer. When the belt-type sludge dewatering device performs filter pressing and dehydration on sludge with different water contents, the required filter belt pressure is different, and the sludge needs to pass through multiple arranged pressure rollers in the filter belt, and the filter belt tension becomes smaller, and the filter belt dehydration effect of the sludge cannot be guaranteed. Utility Model Content

[0003] In view of this, the utility model proposes a sludge dewatering device. To this end, we propose a sludge dewatering device to solve the above-mentioned problems.

[0004] The technical solution of the utility model is achieved in this way:

[0005] A sludge dewatering device comprises a shell, wherein a first filter belt and a second filter belt are arranged in the shell, the first filter belt is sleeved with a plurality of rotating rollers, the plurality of rotating rollers are relatively horizontally opposed in the vertical direction, squeezing rollers are sleeved on both sides of the first filter belt, a first moving mechanism is arranged in the middle surrounded by the first filter belt, a first electric push rod is connected to the bottom of the first moving mechanism, a first U-shaped plate is connected to the telescopic end of the first electric push rod, a first rotating shaft is arranged at both ends of the first U-shaped plate, a first roller is rotatably sleeved on the first rotating shaft, the second filter belt is located below the first filter belt, the second filter belt is sleeved with a plurality of rotating rollers, the plurality of rotating rollers are relatively horizontally opposed in the vertical direction, and the second filter belt has two sides. The sides are both sleeved with squeezing rollers, and the second filter belt is surrounded by a second moving mechanism in the middle, the top of the second moving mechanism is connected to a second electric push rod, the telescopic end of the second electric push rod is connected to a second U-shaped plate, second rotating shafts are provided at both ends of the second U-shaped plate, and a second roller is rotatably sleeved on the second rotating shaft, a feed hopper is provided above the second filter belt and on one side of the first filter belt, a feed pipe and a ventilation pipe are provided on the top of the feed hopper, the feed hopper is provided at the top of the shell, and a through hole is provided on the side wall of the shell away from the feed hopper, a mud discharge groove is slidably provided in the through hole, the side of the mud discharge groove abuts against the side of the second filter belt, and the bottom of the mud discharge groove is connected to a fourth electric push rod, and the fourth electric push rod is provided on the side wall of the shell.

[0006] Preferably, the first moving mechanism includes a first bracket, a first screw rod, a first motor and a first moving block, the first bracket is located in the middle of the first filter belt, the first screw rod is arranged on the first bracket, one end of the first screw rod is rotatably connected to the first bracket, and the other end passes through the first bracket and is driven to the output shaft of the first motor, the first motor is arranged on the side of the first bracket, the first moving block is arranged on the first screw rod, and the bottom of the first moving block is connected to a first electric push rod.

[0007] Preferably, the second moving mechanism includes a second bracket, a second screw rod, a second motor and a second moving block, the second bracket is located in the middle of the second filter belt, the second screw rod is arranged on the second bracket, one end of the second screw rod is rotatably connected to the second bracket, and the other end passes through the second bracket and is driven to the output shaft of the second motor, the second motor is arranged on the side of the second bracket, the second moving block is arranged on the second screw rod, and the top of the second moving block is connected to a second electric push rod.

[0008] Preferably, it also includes a scraper plate, which is in an arc shape with the arc facing downward, the side of the scraper plate abuts against the side of the first filter belt, the top of the scraper plate is connected to the telescopic end of the third electric push rod, and the third electric push rod is arranged on the side wall of the shell.

[0009] Preferably, the water collecting tank further comprises a water collecting tank, the water collecting tank is located below the second filter belt, and a filter net is provided at the bottom of the water collecting tank.

[0010] Preferably, it also includes a drain pipe, which is arranged on the side wall of the shell and passes through the shell to communicate with the bottom of the water collection tank.

[0011] Preferably, it further comprises side plates, wherein two side plates are disposed longitudinally opposite to each other in the shell, and the bottom of the first filter belt and the top of the second filter belt are disposed in the middle of the two side plates.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] ① Driven by the moving mechanism, the first roller and the second roller squeeze the sludge and then slide to one side of the sludge discharge trough, which not only increases the squeezing force of the filter belt on the sludge but also reduces the space in the middle of the filter belt to accommodate the sludge, greatly improving the effect of sludge dehydration;

[0014] ② The fourth electric push rod is used to drive the arc-shaped scraper plate to abut against the side of the first filter belt, so that the sludge stuck on the first filter belt can be scraped off, and under the action of the arc-shaped surface, the sludge falls into the sludge discharge trough, reducing the sludge from contaminating the first filter belt, keeping the first filter belt clean, thereby improving the sludge dewatering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a sludge dewatering device of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of a sludge dewatering device of the utility model;

[0018] In the figure, 1. shell; 2. feed hopper; 3. feed pipe; 4. ventilation pipe; 5. drain pipe; 6. water collecting box; 7. mud discharge trough; 8. first bracket; 9. second bracket; 10. first screw rod; 11. second screw rod; 12. first motor; 13. second motor; 14. first moving block; 15. second moving block; 16. first electric push rod; 17. second electric push rod; 18. first U-shaped plate; 19. second U-shaped plate; 20. first roller; 21. second roller; 22. first rotating shaft; 23. second rotating shaft; 24. first filter belt; 25. second filter belt; 26. mud scraper; 27. third electric push rod; 28. fourth electric push rod; 29. ​​side plate; 30. rotating roller; 31. filter screen; 32. squeezing roller. DETAILED DESCRIPTION

[0019] In order to better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0020] See also Figure 1 to Figure 2 The utility model provides a sludge dewatering device, including a shell 1, which provides structural support to prevent sludge from splashing and dirtying the ground. A first filter belt 24 and a second filter belt 25 are arranged in the shell 1. The first filter belt 24 and the second filter belt 25 both have good air permeability and interception performance for sludge particles. The first filter belt 24 is sleeved with a plurality of rotating rollers 30, and the rotating rollers 30 are all arranged on the side wall of the shell 1. The plurality of rotating rollers 30 are relatively horizontally opposed in the vertical direction. Extrusion rollers 32 are sleeved on both sides of the first filter belt 24. The function of the extrusion rollers 32 is to increase the first filter belt 24 and the second filter belt 25 and The contact angle between the rotating rollers 30 increases the friction force and thus the transmission reliability, and avoids the slipping between the filter belt and the rotating roller 30. The first filter belt 24 is surrounded by a first moving mechanism, and the bottom of the first moving mechanism is connected to a first electric push rod 16, and the telescopic end of the first electric push rod 16 is connected to a first U-shaped plate 18. The first U-shaped plate 18 has a first rotating shaft 22 at both ends, and the first rotating shaft 22 is rotatably sleeved with a first roller 20. The second filter belt 25 is located below the first filter belt 24, and the second filter belt 25 is sleeved with a plurality of rotating rollers 30. The plurality of rotating rollers 30 are vertically relative to the water. The second filter belt 25 is arranged horizontally opposite to each other, and both sides of the second filter belt 25 are sleeved with squeezing rollers 32. A second moving mechanism is arranged in the middle of the second filter belt 25. The movement directions of the first moving mechanism and the second moving mechanism are parallel to each other. A second electric push rod 17 is connected to the top of the second moving mechanism. The telescopic end of the second electric push rod 17 is connected to a second U-shaped plate 19. Second rotating shafts 23 are arranged at both ends of the second U-shaped plate 19. A second roller 21 is rotatably sleeved on the second rotating shaft 23. A feed hopper 2 is arranged above the second filter belt 25 and on one side of the first filter belt 24. A feed pipe 3 and a ventilation pipe 4 are arranged on the top of the feed hopper 2. The ventilation pipe 4 is used to discharge the gas inside the feed hopper 2, which is conducive to the smooth discharge of sludge from the bottom of the feed hopper 2. The feed hopper 2 is arranged at the top of the shell 1, and the side wall of the shell 1 away from the feed hopper 2 is provided with a through hole. A mud discharge groove 7 is slidably provided in the through hole. The side of the mud discharge groove 7 abuts against the side of the second filter belt 25. The bottom of the mud discharge groove 7 is connected with a fourth electric push rod 28, and the fourth electric push rod 28 is arranged on the side wall of the shell 1. The function of the fourth electric push rod 28 is to abut the side of the mud discharge groove 7 against the side of the second filter belt 25, so that the dehydrated sludge falls into the mud discharge groove 7, and at the same time, the sludge can be scraped clean to prevent the sludge from sticking to the second filter belt 25.

[0021] When the sludge dehydration operation is performed, the sludge transmission pipe and the feed pipe 3 are first connected, and the sludge enters the feed hopper 2 from the feed pipe 3. At this time, the air in the feed hopper 2 is discharged from the ventilation pipe 4, and the sludge falls onto the second filter belt 25 through the bottom discharge port of the feed hopper 2. The second filter belt 25 moves under the drive of the rotating roller 30, and the sludge moves to the right with the second filter belt 25. When the sludge moves to the middle of the first filter belt 24 and the second filter belt 25, the first electric push rod 16 is started, and the telescopic end of the first electric push rod 16 extends and drives the first U-shaped plate 18 to descend, and the first U-shaped plate 18 drives the first rotating shaft 22 to descend, thereby driving the first roller 20 mounted on the first rotating shaft 22 to descend, and at the same time, the second electric push rod 17 is started, and the telescopic end of the second electric push rod 17 extends and drives the second U-shaped plate 19 to rise, and the second U-shaped plate 19 drives the second rotating shaft 23 to rise, thereby driving the second roller 21 mounted on the second rotating shaft 23 to rise, and the first roller 20 and The second roller 21 jointly pressurizes the sludge in the middle of the first filter belt 24 and the second filter belt 25, increasing the squeezing force of the first filter belt 24 and the second filter on the sludge, and then starts the first moving mechanism and the second moving mechanism at the same time, the first moving mechanism drives the first electric push rod 16 to move to the right, the movement of the first electric push rod 16 drives the first U-shaped plate 18 to move to the right, the movement of the first U-shaped plate 18 drives the first rotating shaft 22 to move to the right, the movement of the first rotating shaft 22 drives the first roller 20 to move, similarly, the second moving mechanism moves to the right and drives the second roller 21 to move to the right, the first roller 20 and the second roller 21 move synchronously, squeezing the sludge in the first filter belt 24 and the second filter belt 25 to the right, reducing the space for sludge accommodation, squeezing out the gap moisture inside the sludge and discharging it through the gap between the filter belts, and the sludge discharged of moisture will fall into the discharge trough driven by the first filter belt 24 and the second filter belt 25, thereby completing the sludge dehydration operation.

[0022] Preferably, the first moving mechanism includes a first bracket 8, a first screw rod 10, a first motor 12 and a first moving block 14. The first bracket 8 is located in the middle surrounded by the first filter belt 24. The first screw rod 10 is arranged on the first bracket 8. One end of the first screw rod 10 is rotatably connected to the first bracket 8, and the other end passes through the first bracket 8 and is driven to the output shaft of the first motor 12. The first motor 12 is arranged on the side of the first bracket 8. The first moving block 14 is arranged on the first screw rod 10. The bottom of the first moving block 14 is connected to a first electric push rod 16.

[0023] When the first moving mechanism is started, the first motor 12 is started first. The rotation of the first motor 12 drives the first screw rod 10 to rotate. The first screw rod 10 and the first moving block 14 are screwed together, thereby driving the first moving block 14 to move on the first screw rod 10. The movement of the first moving block 14 drives the first electric push rod 16 to move, thereby realizing the reciprocating motion of the first electric push rod 16 on the first screw rod 10.

[0024] Preferably, the second moving mechanism includes a second bracket 9, a second screw rod 11, a second motor 13 and a second moving block 15. The second bracket 9 is located in the middle surrounded by the second filter belt 25. The second screw rod 11 is arranged on the second bracket 9. One end of the second screw rod 11 is rotatably connected to the second bracket 9, and the other end passes through the second bracket 9 and is driven to the output shaft of the second motor 13. The second motor 13 is arranged on the side of the second bracket 9. The second moving block 15 is arranged on the second screw rod 11. The top of the second moving block 15 is connected to a second electric push rod 17.

[0025] When the second moving mechanism is started, the second motor 13 is started first. The rotation of the second motor 13 drives the second screw rod 11 to rotate. The second screw rod 11 and the second moving block 15 are screwed together, thereby driving the second moving block 15 to move on the second screw rod 11. The movement of the second moving block 15 drives the second electric push rod 17 to move, thereby realizing the reciprocating motion of the second electric push rod 17 on the first screw rod 10.

[0026] Preferably, it also includes a scraper plate 26, which is in an arc shape and the arc faces downward. The side of the scraper plate 26 abuts against the side of the first filter belt 24. The top of the scraper plate 26 is connected to the telescopic end of the third electric push rod 27, and the third electric push rod 27 is arranged on the side wall of the shell 1.

[0027] When the sludge dewatering device is working, the third electric push rod 27 is first started, and the telescopic end of the third electric push rod 27 is extended to move the scraper plate 26 toward the side of the first filter belt 24 and finally the side of the scraper plate 26 and the side of the first filter belt 24 are abutted against each other. When the first filter belt 24 moves, the scraper plate 26 can scrape off the sludge adhered to the first filter belt 24, and the scraped sludge will move along the arc surface of the scraper plate 26. The arc plate is set downward, and the sludge finally falls into the mud discharge trough 7 below and is discharged from the shell 1 along the mud discharge trough 7.

[0028] Preferably, it further comprises a water collecting tank 6 , which is located below the second filter belt 25 , and a filter screen 31 is provided at the bottom of the water collecting tank 6 .

[0029] When the sludge dewatering device is working, the first filter belt 24 and the second filter belt 25 continuously squeeze the sludge, and the water in the sludge will flow out through the gap between the first filter belt 24 and the second filter belt 25. Under the action of gravity, the outflowing water will flow downward into the water collecting tank 6. The filter net 31 in the water collecting tank 6 can filter out some gravel and impurities, which is beneficial to the cleaning of the water. The water collecting tank 6 can store a certain amount of water to play the role of recycling water.

[0030] Preferably, it also includes a drain pipe 5, which is arranged on the side wall of the shell 1 and passes through the shell 1 to be connected with the bottom of the water collection tank 6.

[0031] The drain pipe 5 is connected to the water collecting tank 6. The water in the water collecting tank 6 can be reused after being filtered. The water in the water collecting tank 6 can be conveniently discharged to the outside through the drain pipe 5, which is convenient for the subsequent reuse of the water.

[0032] Preferably, it further comprises a side plate 29 , wherein two side plates 29 are disposed longitudinally opposite to each other in the housing 1 , and the bottom of the first filter belt 24 and the top of the second filter belt 25 are disposed between the two side plates 29 .

[0033] When the sludge dewatering device is working, the sludge moves to the bottom of the first filter belt 24 along with the second filter belt 25. At this time, the first electric push rod 16 is started, and the telescopic end of the first electric push rod 16 is extended to drive the first roller 20 to move downward. At the same time, the second electric push rod 17 is started, and the telescopic end of the second electric push rod 17 is extended to drive the second roller 21 to move upward. When the first roller 20 and the second roller 21 jointly press the first filter belt 24 and the second filter belt 25, the bottom of the first filter belt 24 and the top of the second filter belt 25 are arranged in the middle of the two side plates 29. The two side plates 29 play a role in preventing the sludge from overflowing. When the first moving mechanism and the second moving mechanism are driven synchronously, the first roller 20 and the second roller 21 roll to the right, squeezing the sludge in the first filter belt 24 and the second filter belt 25 to the right, reducing the space for sludge accommodation, and squeezing out the gap water inside the sludge and discharging it through the gap between the filter belts.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge dewatering device, characterized in that: The invention comprises a shell, wherein a first filter belt and a second filter belt are arranged in the shell, the first filter belt is sleeved with a plurality of rotating rollers, the plurality of rotating rollers are relatively horizontally opposed in the vertical direction, squeezing rollers are sleeved on both sides of the first filter belt, a first moving mechanism is arranged in the middle surrounded by the first filter belt, a first electric push rod is connected to the bottom of the first moving mechanism, a first U-shaped plate is connected to the telescopic end of the first electric push rod, a first rotating shaft is arranged at both ends of the first U-shaped plate, a first roller is rotatably sleeved on the first rotating shaft, the second filter belt is located below the first filter belt, the second filter belt is sleeved with a plurality of rotating rollers, the plurality of rotating rollers are relatively horizontally opposed in the vertical direction, the second filter belt is sleeved with squeezing rollers on both sides, a first moving mechanism is arranged in the middle surrounded by the first filter belt, a first electric push rod is connected to the bottom of the first moving mechanism, a first U-shaped plate is connected to the telescopic end of the first electric push rod, a first rotating shaft is arranged at both ends of the first U-shaped plate, a first roller is rotatably sleeved on the first rotating shaft, the second filter belt is located below the first filter belt, the second filter belt is sleeved with a plurality of rotating rollers, the plurality of rotating rollers are relatively horizontally opposed in the vertical direction, There is an extrusion roller, and a second moving mechanism is provided in the middle of the second filter belt. A second electric push rod is connected to the top of the second moving mechanism, and a second U-shaped plate is connected to the telescopic end of the second electric push rod. Second rotating shafts are provided at both ends of the second U-shaped plate, and a second roller is rotatably sleeved on the second rotating shaft. A feed hopper is provided above the second filter belt and on one side of the first filter belt, a feed pipe and a ventilation pipe are provided on the top of the feed hopper, and the feed hopper is provided at the top of the shell, and a through hole is provided on the side wall of the shell away from the feed hopper, and a mud discharge groove is slidably provided in the through hole, and the side of the mud discharge groove abuts against the side of the second filter belt, and the bottom of the mud discharge groove is connected to a fourth electric push rod, and the fourth electric push rod is provided on the side wall of the shell.

2. A sludge dewatering device according to claim 1, characterized in that: The first moving mechanism includes a first bracket, a first screw rod, a first motor and a first moving block. The first bracket is located in the middle of the first filter belt. The first screw rod is arranged on the first bracket. One end of the first screw rod is rotatably connected to the first bracket, and the other end passes through the first bracket and is driven to the output shaft of the first motor. The first motor is arranged on the side of the first bracket. The first moving block is arranged on the first screw rod. The bottom of the first moving block is connected to a first electric push rod.

3. A sludge dewatering device according to claim 1, characterized in that: The second moving mechanism includes a second bracket, a second screw rod, a second motor and a second moving block. The second bracket is located in the middle of the second filter belt. The second screw rod is arranged on the second bracket. One end of the second screw rod is rotatably connected to the second bracket, and the other end passes through the second bracket and is driven to the output shaft of the second motor. The second motor is arranged on the side of the second bracket. The second moving block is arranged on the second screw rod. A second electric push rod is connected to the top of the second moving block.

4. A sludge dewatering device according to claim 1, characterized in that: It also includes a scraper plate, which is in an arc shape with the arc facing downward. The side of the scraper plate abuts against the side of the first filter belt. The top of the scraper plate is connected to the telescopic end of the third electric push rod, and the third electric push rod is arranged on the side wall of the shell.

5. A sludge dewatering device according to claim 1, characterized in that: It also includes a water collection tank, which is located below the second filter belt and has a filter screen at the bottom.

6. A sludge dewatering device according to claim 1, characterized in that: It also includes a drain pipe, which is arranged on the side wall of the shell and passes through the shell to communicate with the bottom of the water collection tank.

7. A sludge dewatering device according to claim 1, characterized in that: It also includes side plates, wherein two side plates are longitudinally arranged opposite to each other in the shell, and the bottom of the first filter belt and the top of the second filter belt are arranged in the middle of the two side plates.

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