A device for cleaning a drum filter

Abstract

The utility model discloses a kind of for drum filter's deslagging device, it is related to sewage treatment technical field, including filter tank, filter tank inside is provided with filter drum, filter tank left side wall is fixedly connected with speed reducer, the output end of speed reducer passes through filter tank left side wall and is fixedly connected with filter drum left side, spray pipe is fixedly connected with several high-pressure nozzles in filter tank inside above filter drum, spray pipe bottom is fixedly connected with several high-pressure nozzles, filter tank right side wall top is fixedly connected with blow-off tank, blow-off tank left end extends to filter drum inside and is located just below high-pressure nozzle, blow-off tank right end extends to filter tank right end outside.Advantage is that: by setting high-pressure nozzle continuous spraying operation, cooperate filter drum rotation, realize dynamic deslagging, without interrupting filtration process, equipment continuous operation efficiency has been improved, the problem of shutdown caused by traditional manual deslagging has been solved, guarantee the continuity of sewage treatment system.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a sludge removal device for a rotary drum filter. Background Technology

[0002] In recent years, with the emergence of new water treatment processes, integrated rotary drum filters have become a commonly used wastewater treatment equipment. They are a type of continuous filter and their main structure consists of a drive mechanism, a rotating drum, a filter screen, and a housing. The drive mechanism drives the rotating drum to rotate, and the filter screen on the drum filters out impurities from the water.

[0003] For example, Chinese Patent (CN217220492U) discloses a slag removal device for a rotary drum filter, including a reducer and a brush shaft. The brush shaft is arranged parallel to the screen shaft of the rotary drum filter. The reducer is installed on the outside of the drum wall of the rotary drum filter and its working end is connected to the brush shaft. Bristles are arranged around the brush shaft, and the bristles mesh with the screen of the rotary drum filter in a gear-like manner. The brush shaft and the screen shaft rotate in opposite directions. This slag removal device for a rotary drum filter can perform slag removal in real time during the operation of the rotary drum filter, ensuring long-term stable operation of the equipment and improving work efficiency.

[0004] The aforementioned devices use scrapers for cleaning. However, since the filter screen is composed of grid bars, screenings easily accumulate in the grid gaps after prolonged operation, reducing the throughput. This can only be addressed by periodically shutting down the equipment and manually removing the screenings that clog the gaps. Periodic shutdowns for cleaning directly cause short-term shutdowns of the equipment or the entire processing system, affecting the continuity of the process. Some filter screen devices are installed in underground pools or enclosed spaces, requiring manual cleaning into confined spaces, which may pose safety hazards such as lack of oxygen, harmful gases, and slippery conditions. Additional protective equipment and strict safety procedures are required, further increasing the complexity of the operation. To address these issues, a cleaning device for rotary drum filters is proposed. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a slag removal device for a rotary drum filter. This solves the problem that, in current systems, the filter screen is composed of grid bars, which easily accumulates slag in the grid gaps after prolonged operation, reducing throughput. This can only be addressed by periodically shutting down the equipment and manually removing the slag clogging the gaps. However, periodic shutdowns for slag removal directly cause short-term interruptions to the equipment or the entire processing system, affecting the continuity of the process. Furthermore, some filter screens are installed in underground tanks or enclosed spaces, requiring manual slag removal into confined spaces, potentially posing safety hazards such as oxygen deficiency, harmful gases, and slippery conditions. Additional protective equipment and strict safety procedures are required, further increasing operational complexity.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a slag removal device for a rotary drum filter, comprising a filter tank, a rotary drum being installed inside the filter tank, a speed reducer being fixedly connected to the left side wall of the filter tank, the output end of the speed reducer passing through the left side wall of the filter tank and being fixedly connected to the left side of the rotary drum, a spray pipe being fixedly connected above the rotary drum inside the filter tank, a plurality of high-pressure nozzles being fixedly connected to the bottom of the spray pipe, a sludge discharge trough being fixedly connected above the right side wall of the filter tank, the left end of the sludge discharge trough extending into the interior of the rotary drum and located directly below the high-pressure nozzles, and the right end of the sludge discharge trough extending to the outer side of the right end of the filter tank.

[0007] Preferably, a fixing plate is fixedly connected to the left rear side of the filter tank, and a booster pump is fixedly connected above the fixing plate. The output end of the booster pump is fixedly connected to an inlet pipe through a flange. The inlet pipe communicates with the inside of the filter tank. The output end of the booster pump is fixedly connected to a connecting pipe, and the end of the connecting pipe is fixedly connected to the left end of the spray pipe.

[0008] Preferably, four sets of rotating shafts are rotatably connected to the inner wall of the right side of the filter tank, and guide wheels are fixedly connected to the ends of the four rotating shafts. A limit ring is fixedly connected to the outer side of the right end of the filter drum, and the outer side of the limit ring abuts against the inner side of the four sets of guide wheels.

[0009] Preferably, a water baffle ring is fixedly connected to the inner side of the right end of the filter drum, a sludge inlet pipe is fixedly connected to the lower side of the right side wall of the filter tank, the left end of the sludge inlet pipe extends into the interior of the filter drum, and several diversion pipes are fixedly connected to the bottom of the sludge inlet pipe.

[0010] Preferably, a guide channel is fixedly connected to the right side of the filter tank and the end of the sewage discharge tank. The guide channel is inclined with an inclination angle of 30 to 45 degrees.

[0011] Preferably, a purified water drain pipe is fixedly connected to the rear right end of the filter tank, and the height of the purified water drain pipe from the ground is higher than the height of the inlet pipe from the ground.

[0012] Preferably, a reinforcing rib is fixedly connected to the bottom of the sewage discharge trough, and the right side of the reinforcing rib is fixedly connected to the inner wall of the right side of the filter tank.

[0013] Compared with existing technologies, the advantages of this utility model are as follows: This utility model achieves dynamic sludge removal by setting up high-pressure nozzles for continuous spraying, combined with the rotation of the filter drum, without interrupting the filtration process. This improves the continuous operation efficiency of the equipment, solves the downtime problem caused by traditional manual sludge removal, and ensures the continuity of the sewage treatment system. The booster pump provides high-pressure water flow, and the high-pressure nozzles form a fan-shaped spray surface that covers the entire circumference of the filter drum, which can remove impurities in the grid gaps. The sludge removal rate is greatly improved, far exceeding the efficiency of manual sludge removal. The sewage discharge tank and the guide tank use gravity to guide the sludge-water mixture to be discharged quickly, avoiding backflow pollution. The diversion pipe evenly distributes water, improving filtration efficiency. Through the above settings, no personnel need to enter the confined space. Non-contact sludge removal can completely avoid personnel exposure to dangerous environments, eliminating potential safety hazards at the source. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the present invention from another perspective; Figure 3 This is a schematic diagram of the structure of the filter tank of this utility model; Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0015] The numbers on the map are: 1. Filter tank; 2. Reducer; 3. Filter drum; 4. Limit ring; 5. Water baffle ring; 6. Rotating shaft; 7. Guide wheel; 8. Sewage discharge trough; 9. Reinforcing rib; 10. Flow guide trough; 11. Sewage inlet pipe; 12. Diversion pipe; 13. Spray pipe; 14. High-pressure nozzle; 15. Fixing plate; 16. Booster pump; 17. Connecting pipe; 18. Water inlet pipe; 19. Clean water discharge pipe. Detailed Implementation

[0016] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0017] Reference Figures 1-4As shown, a slag removal device for a rotary drum filter includes a filter tank 1, a rotary drum 3 inside the filter tank 1, a reducer 2 fixedly connected to the left side wall of the filter tank 1, the output end of the reducer 2 passing through the left side wall of the filter tank 1 and fixedly connected to the left side of the rotary drum 3, a spray pipe 13 fixedly connected above the rotary drum 3 inside the filter tank 1, several high-pressure nozzles 14 fixedly connected to the bottom of the spray pipe 13, a sludge discharge trough 8 fixedly connected above the right side wall of the filter tank 1, the left end of the sludge discharge trough 8 extending into the interior of the rotary drum 3 and located directly below the high-pressure nozzles 14, and the right end of the sludge discharge trough 8 extending to the outside of the right end of the filter tank 1. The device can set the slag removal cycle through a PLC, and the booster pump 16 is linked to the reducer 2 to start and stop, avoiding ineffective energy consumption. When the rotary drum 3 rotates at low speed, the kinetic energy of the high-pressure water is mainly used for slag removal rather than driving the drum, thus reducing energy consumption compared to traditional mechanical scraping methods.

[0018] Furthermore, a fixing plate 15 is fixedly connected to the left rear side of the filter tank 1, and a booster pump 16 is fixedly connected above the fixing plate 15. The output end of the booster pump 16 is fixedly connected to an inlet pipe 18 through a flange. The inlet pipe 18 communicates with the inside of the filter tank 1. The output end of the booster pump 16 is fixedly connected to a connecting pipe 17. The end of the connecting pipe 17 is fixedly connected to the left end of the spray pipe 13. The booster pump 16 can draw clean water from the filter tank 1, pressurize it, and then deliver the high-pressure water to the spray pipe 13 to provide sufficient water pressure for the sludge removal process and ensure the sludge removal effect.

[0019] Furthermore, four sets of rotating shafts 6 are rotatably connected to the inner wall of the right side of the filter tank 1. Guide wheels 7 are fixedly connected to the ends of the four rotating shafts 6. A limit ring 4 is fixedly connected to the outer side of the right end of the filter drum 3. The outer side of the limit ring 4 abuts against the inner side of the four sets of guide wheels 7. The four sets of guide wheels 7 abut against the limit ring 4, supporting the right end of the filter drum 3 and limiting axial displacement to ensure smooth rotation.

[0020] Furthermore, a water-blocking ring 5 is fixedly connected to the inner side of the right end of the filter drum 3, and a sewage inlet pipe 11 is fixedly connected to the lower side of the right side wall of the filter tank 1. The left end of the sewage inlet pipe 11 extends into the interior of the filter drum 3, and several diversion pipes 12 are fixedly connected to the bottom of the sewage inlet pipe 11. The water-blocking ring 5 prevents the spray water from leaking to the right side of the filter drum 3, prevents sewage from flowing into the interior of the filter tank 1 and mixing with the filtered clean water, and maintains the stability of the internal environment of the filter tank 1. The diversion pipes 12 can evenly distribute the sewage introduced by the sewage inlet pipe 11 to different positions inside the filter drum 3, so that the sewage can fully contact the filter screen and improve the filtration effect.

[0021] Furthermore, a guide channel 10 is fixedly connected to the right side of the filter tank 1 and the end of the sewage discharge tank 8. The guide channel 10 is set at an inclination angle of 30 to 45 degrees. The guide channel 10 can smoothly guide the sludge-water mixture discharged from the sewage discharge tank 8 to the designated position for subsequent treatment. At the same time, the inclination design is conducive to the rapid discharge of the sludge-water mixture and reduces the possibility of blockage.

[0022] Furthermore, a clean water drain pipe 19 is fixedly connected to the right rear side of the filter tank 1. The height of the clean water drain pipe 19 from the ground is higher than that of the inlet pipe 18 from the ground. The high position of the clean water drain pipe 19 can ensure that the booster pump 16 can draw clean water into the spray pipe 13 without water level issues.

[0023] Furthermore, a reinforcing rib 9 is fixedly connected to the bottom of the sewage discharge tank 8. The right side of the reinforcing rib 9 is fixedly connected to the inner wall of the right side of the filter tank 1. The reinforcing rib 9 enhances the structural strength of the sewage discharge tank 8, enabling it to withstand the weight and impact of the sludge-water mixture, thereby improving the stability and durability of the sewage discharge tank 8.

[0024] Working principle: First, the inlet pipe 11 is connected to the external sewage supply mechanism. Sewage enters the filter drum 3 through the inlet pipe 11 and the diversion pipe 12. The filter drum 3 rotates at low speed under the drive of the reducer 2. The filter screen traps impurities. The clean water passes through the filter screen of the filter drum 3 and falls into the filter tank 1. Then it is discharged through the clean water drain pipe 19. The booster pump 16 draws water from the filter tank 1. After being pressurized through the water inlet pipe 18 and the connecting pipe 17, it is delivered to the spray pipe 13. The high-pressure nozzle 14 sprays water downward. When the filter drum 3 rotates, the high-pressure water jet vertically impacts the outer surface of the filter screen, peeling off the trapped screenings (such as fibers and debris) from the screen gaps. The peeled sludge-water mixture rotates with the drum to the position of the sewage discharge trough 8. Under the action of gravity, it falls into the sewage discharge trough 8 and is discharged from the filter tank 1 through the guide channel 10.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A slag removal device for a rotary drum filter, characterized in that: The filter includes a filter tank (1), inside which a filter drum (3) is installed. A speed reducer (2) is fixedly connected to the left side wall of the filter tank (1). The output end of the speed reducer (2) passes through the left side wall of the filter tank (1) and is fixedly connected to the left side of the filter drum (3). A spray pipe (13) is fixedly connected above the filter drum (3) inside the filter tank (1). Several high-pressure nozzles (14) are fixedly connected to the bottom of the spray pipe (13). A sewage trough (8) is fixedly connected above the right side wall of the filter tank (1). The left end of the sewage trough (8) extends into the filter drum (3) and is located directly below the high-pressure nozzles (14). The right end of the sewage trough (8) extends to the outside of the right end of the filter tank (1).

2. The slag removal device for a rotary drum filter according to claim 1, characterized in that: A fixing plate (15) is fixedly connected to the left rear side of the filter tank (1). A booster pump (16) is fixedly connected above the fixing plate (15). The output end of the booster pump (16) is fixedly connected to an inlet pipe (18) through a flange. The inlet pipe (18) is connected to the inside of the filter tank (1). The output end of the booster pump (16) is fixedly connected to a connecting pipe (17). The end of the connecting pipe (17) is fixedly connected to the left end of the spray pipe (13).

3. The slag removal device for a rotary drum filter according to claim 1, characterized in that: The filter tank (1) has four sets of rotating shafts (6) rotatably connected to the inner wall on the right side. The ends of the four rotating shafts (6) are all fixedly connected to guide wheels (7). The outer side of the right end of the filter drum (3) is fixedly connected to a limiting ring (4). The outer side of the limiting ring (4) abuts against the inner side of the four sets of guide wheels (7).

4. A slag removal device for a rotary drum filter according to claim 1, characterized in that: A water baffle ring (5) is fixedly connected to the inner side of the right end of the filter drum (3), and a sewage inlet pipe (11) is fixedly connected to the lower side of the right side wall of the filter tank (1). The left end of the sewage inlet pipe (11) extends into the filter drum (3), and several diversion pipes (12) are fixedly connected to the bottom of the sewage inlet pipe (11).

5. A slag removal device for a rotary drum filter according to claim 1, characterized in that: The filter pool (1) is fixedly connected to the end of the sewage trough (8) on the right side, and the guide channel (10) is inclined with an inclination angle of 30 to 45 degrees.

6. A slag removal device for a rotary drum filter according to claim 1, characterized in that: A water purification pipe (19) is fixedly connected to the right rear side of the filter tank (1). The height of the water purification pipe (19) from the ground is higher than that of the water inlet pipe (18) from the ground.

7. A slag removal device for a rotary drum filter according to claim 1, characterized in that: The bottom of the sewage trough (8) is fixedly connected with a reinforcing rib (9), and the right side of the reinforcing rib (9) is fixedly connected to the inner wall of the right side of the filter tank (1).

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