Self-cleaning type wastewater pretreatment device

Abstract

The utility model discloses a self-cleaning type wastewater pretreatment device which comprises a filter main body and a filter cavity arranged on the inner side of the middle of the filter main body, bottom plates are respectively arranged on the upper side and the lower side of the filter cavity, a plurality of filter bags are connected outside the upper side of the bottom plate on the lower side, and a motor is arranged on the upper side of the top of the filter main body. An inlet is formed in the left lower side of the filter main body, an outlet is formed in the right upper side of the filter main body, a pressure difference controller is arranged on the lower side of the outlet, and a traditional backwashing filter mostly adopts water flow in a single direction to wash, so that the cleaning effect on dead angles of a filter screen or a filter bag is poor. When the roller in the device rotates, the angle of the high-pressure nozzle is dynamically adjusted along with the roller, the interior of the filter bag can be impacted by multi-angle and all-directional high-pressure gas, stubborn impurities can be effectively removed especially for the positions, where impurities are prone to accumulation, of wrinkles, corners and the like of the filter bag, and compared with a static flushing mode, the cleaning efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of wastewater pretreatment devices, specifically relating to a self-cleaning wastewater pretreatment device. Background Technology

[0002] This wastewater pretreatment device is specifically a self-cleaning backwash filter. It removes impurities trapped in the filter screen through automatic backwashing, achieving continuous filtration and self-cleaning. Its core advantage lies in the fact that filter screen regeneration can be completed without stopping the machine or disassembling it, making it particularly suitable for industrial wastewater with high suspended solids, oil, or fiber content.

[0003] Existing backwash filters often use unidirectional water flow or static flushing methods, which makes it difficult to effectively clean the dead corners, folds, and edges of the filter screen or filter bag, easily leading to the problem of impurity residue. Utility Model Content

[0004] The purpose of this utility model is to provide a self-cleaning wastewater pretreatment device to solve the problem that existing backwash filters in the background art often use unidirectional water flow or static rinsing methods, which make it difficult to effectively clean the dead corners, folds and edges of the filter screen or filter bag, and easily lead to the problem of impurity residue.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-cleaning wastewater pretreatment device, comprising a filter body and a filter chamber disposed on the inner side of the middle of the filter body;

[0006] The filter chamber has a base plate on its upper and lower sides respectively. Multiple filter bags are connected to the upper side of the lower base plate. A motor is installed on the top of the filter body. An inlet is installed on the lower left side of the filter body. An outlet is installed on the upper right side of the filter body. A differential pressure controller is installed below the outlet.

[0007] The space below the bottom plate is a sludge collection chamber, and a drain valve is connected to the lower right side of the sludge collection chamber;

[0008] A control box is located on the outer left side of the filter body;

[0009] The motor has an output rod connected to its lower side, a compressed air pump is installed on the lower front side of the motor, a flushing arm is installed on the lower outer side of the output rod, a roller is installed inside the front side of the flushing arm, high-pressure nozzles are connected to the outer triangle of the roller, a rotating shaft is sleeved on one side of the roller and the flushing arm, the output port of the compressed air pump is connected to the output rod and the inside of the flushing arm, and a connecting pipe is connected to the connection of the roller.

[0010] The motor, differential pressure controller, drain valve, and compressed air pump are electrically connected to the control box, which is powered by an external power source.

[0011] Preferably, the output rod is movably connected to the bottom of the filter body, and the output rod can rotate inside the filter body.

[0012] Preferably, the flushing arm and the output rod are fixedly connected, the compressed air pump is externally connected to the motor output rod by bolt connection, and a mounting base is provided at the upper connection between the motor and the filter body.

[0013] Preferably, the roller is a cylindrical shape with equidistant concave and convex surfaces on the outside and hollow inside, and the connection between the concave and convex outer surface of the roller and the lower bottom plate is provided with interlocking concave and convex grooves.

[0014] Preferably, the roller can rotate on the base plate via grooves, and the position of the high-pressure nozzle on the outside of the roller corresponds to the position of the filter bag on the upper side of the base plate;

[0015] When the drum rotates, at least one of the high-pressure nozzles is located inside the corresponding filter bag.

[0016] Preferably, a pressure gauge fixing connection seat is provided on the upper right side of the filter body, an exhaust port is provided on the upper left side of the filter body, and fixing seats for fixing and supporting are respectively provided on the four outer corners of the lower side of the filter body.

[0017] Compared with the prior art, this utility model provides a self-cleaning wastewater pretreatment device, which has the following beneficial effects:

[0018] 1. Traditional backwash filters typically use a single-direction water flow for rinsing, which is ineffective at cleaning dead corners of the filter screen or filter bag. In contrast, in this device, as the drum rotates, the high-pressure nozzles dynamically adjust their angles, delivering high-pressure gas impacts into the filter bag from multiple angles and all directions. This effectively removes stubborn impurities, especially in areas prone to accumulating dirt, such as folds and corners of the filter bag. Compared to static rinsing methods, this significantly improves cleaning efficiency.

[0019] 2. For contaminants with strong adhesion such as grease and colloids, the instantaneous explosive force of high-pressure gas combined with the mechanical disturbance generated by the rotation of the drum can break the adhesion between impurities and filter media. Compared with traditional water flushing, the removal rate of sticky impurities is increased by more than 40%, solving the problem of incomplete filter media cleaning in the industry.

[0020] 3. The linkage design between the drum and the rinsing arm allows the high-pressure nozzles to automatically switch cleaning zones according to the drum's rotation trajectory, eliminating the need for complex positioning mechanisms. When the system detects severe impurity buildup in a certain area (based on differential pressure data feedback), it can automatically extend the cleaning time for that area or increase the jet pressure, achieving intelligent targeted cleaning and reducing ineffective rinsing energy consumption. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main body of the filter in this utility model.

[0022] Figure 2 In this utility model Figure 1 A schematic diagram of the right front section view.

[0023] Figure 3 This is a schematic diagram of the structure of the motor, output rod, and flushing arm in this utility model.

[0024] Figure 4 In this utility model Figure 1 A magnified structural diagram of the central circular region.

[0025] Figure 5 This is a schematic diagram of the front view of the roller structure in this utility model.

[0026] Figure 6 This is a structural schematic diagram of the roller from the left side view in this utility model.

[0027] In the diagram: 1. Motor; 2. Control box; 3. Pressure gauge mounting bracket; 4. Exhaust port; 5. Filter body; 6. Outlet; 7. Differential pressure controller; 8. Drain valve; 9. Inlet; 10. Mounting base; 11. Filter chamber; 12. Output rod; 13. Compressed air pump; 14. Filter bag; 15. Sludge collection chamber; 16. Flushing arm; 17. Base plate; 18. Mounting base; 19. Connecting pipe; 20. Roller; 21. High-pressure nozzle; 22. Shaft. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] This utility model provides, for example Figure 1-6 The self-cleaning wastewater pretreatment device shown includes a filter body 5 and a filter chamber 11 disposed on the inner side of the middle of the filter body 5.

[0030] The filter chamber 11 is provided with a base plate 17 on the upper and lower sides respectively. Multiple filter bags 14 are connected to the upper side of the lower base plate 17. A motor 1 is provided on the top of the filter body 5. An inlet 9 is provided on the lower left side of the filter body 5. An outlet 6 is provided on the upper right side of the filter body 5. A differential pressure controller 7 is provided on the lower side of the outlet 6.

[0031] Optionally, outlet 6 is used to connect to an external water outlet pipe, and inlet 9 is used to connect to an external wastewater pipe.

[0032] The space below the bottom plate 17 is a sludge collection chamber 15, and a drain valve 8 is connected to the lower right side of the sludge collection chamber 15.

[0033] Optionally, the sludge filtered and intercepted in the filter bag 14 will accumulate in the filter bag 14 and the sludge collection chamber 15. Because it is intercepted, it will not pass through the filter bag 14 and enter the filter chamber 11, thus completing the filtration effect.

[0034] A control box 2 is located on the left side of the filter body 5. An output rod 12 is connected to the lower side of the motor 1. A compressed air pump 13 is located on the lower front side of the motor 1. A flushing arm 16 is located on the lower side of the output rod 12. A roller 20 is located inside the front side of the flushing arm 16. A high-pressure nozzle 21 is connected to the outside of the triangular part of the roller 20. A rotating shaft 22 is connected to one side of the roller 20 and the flushing arm 16. The output port 6 of the compressed air pump 13 is connected to the output rod 12 and the inside of the flushing arm 16, and a connecting pipe 19 is connected to the connection between the roller 20 and the roller 20.

[0035] Motor 1, differential pressure controller 7, drain valve 8, and compressed air pump 13 are electrically connected to control box 2. Control box 2 is powered by an external power source. Control box 2 serves as the core control unit for the entire device, enabling coordinated control of all components through electrical connections to motor 1, differential pressure controller 7, drain valve 8, and compressed air pump 13. Based on the signal from differential pressure controller 7, control box 2 automatically starts or stops motor 1 and compressed air pump 13, and controls the opening and closing of drain valve 8, ensuring the device can automatically and efficiently complete filtration and self-cleaning operations.

[0036] In this embodiment, when using the device, the user first connects the control box 2 to an external power source, and the electrical equipment such as the motor 1, differential pressure controller 7, drain valve 8, and compressed air pump 13 are all powered by connecting to the control box 2.

[0037] Then, the valve at inlet 9 is opened to allow external wastewater to enter the filter chamber 11 of the filter body 5. At this time, the wastewater is filtered through the filter bag 14, and impurities are intercepted inside the filter bag 14. The purified water flows out from outlet 6.

[0038] During this process, the differential pressure controller 7 monitors the pressure difference between the inlet and outlet in real time. Under normal circumstances, the pressure difference fluctuates within a certain range. When the differential pressure controller 7 detects that the pressure difference between the inlet and outlet exceeds the set value, it indicates that the filter bag 14 is blocked by impurities. At this time, after receiving the signal from the differential pressure controller 7, the control box 2 starts the motor 1 and the compressed air pump 13. The motor 1 drives the output rod 12 to rotate. Since the flushing arm 16 is fixedly connected to the output rod 12, the flushing arm 16 rotates accordingly.

[0039] While the flushing arm 16 rotates, the drum 20 rotates with the flushing arm 16. Since the drum 20 has interlocking grooves at the connection between its outer surface and the bottom plate 17, the drum 20 rotates on the bottom plate 17 through the grooves. The compressed air pump 13 delivers compressed air to the inside of the drum 20 through the connecting pipe 19, and then sprays it outward from the three high-pressure nozzles 21 outside the drum 20. When the drum 20 rotates, the rotation angle of the high-pressure nozzles 21 changes, and high-pressure gas is sprayed into the filter bag 14 that is turning, blowing off the impurities in the filter bag 14. The blown-off impurities fall into the collection chamber 15. The control box 2 opens the drain valve 8 to discharge the impurities in the collection chamber 15.

[0040] After the self-cleaning operation is completed, the control box 2 stops the operation of the motor 1 and the compressed air pump 13, and closes the drain valve 8. The device returns to normal filtration status and continues to treat wastewater.

[0041] like Figure 1-6 As shown, the output rod 12 is movably connected to the bottom of the filter body 5, and the output rod 12 can rotate inside the filter body 5. The flushing arm 16 is fixedly connected to the output rod 12. The compressed air pump 13 is connected to the output rod 12 of the motor 1 by bolts. A mounting seat 18 is provided at the upper connection between the motor 1 and the filter body 5. The roller 20 is a cylindrical shape with equidistant concave and convex shapes on the outside and hollow inside. The concave and convex outer surfaces of the roller 20 and the lower bottom plate 17 are provided with interlocking concave and convex grooves. The roller 20 can rotate on the bottom plate 17 through the concave and convex grooves. The position of the high pressure nozzle 21 on the outside of the roller 20 corresponds to the position of the filter bag 14 on the upper side of the bottom plate 17. When the roller 20 rotates, at least one high pressure nozzle 21 is located inside the corresponding filter bag 14. A pressure gauge fixing connection seat 3 is provided on the upper right side of the filter body 5. An exhaust port 4 is opened on the upper left side of the filter body 5. Fixing seats 10 for fixing and supporting are provided on the four lower corners of the filter body 5.

[0042] Preferably, in this device, when wastewater enters the filter chamber 11 from the inlet 9, it passes through the filter bag 14 under pressure. The filter bag 14 has a certain filtration accuracy and can intercept solid impurities in the wastewater, allowing the purified water to flow out from the outlet 6, thus achieving preliminary pretreatment of the wastewater.

[0043] The differential pressure controller 7 monitors the pressure difference between outlet 6 and inlet 9 in real time. As the filtration process proceeds, impurities gradually accumulate on the filter bag 14, leading to increased filtration resistance and a rise in the inlet-outlet pressure difference. When the pressure difference exceeds the set threshold, it indicates that the filter bag 14 is severely clogged and requires a self-cleaning operation. During the self-cleaning operation, the motor 1 acts as the power source, driving the flushing arm 16 to rotate via the output rod 12. Simultaneously, because the roller 20 and the flushing arm 16 are connected by a rotating shaft 22, and the roller 20 and the lower base plate 17 have a groove fit, the roller 20 can also rotate on the base plate 17 when the flushing arm 16 rotates.

[0044] During the rotation of the drum 20, the compressed air pump 13 generates compressed air, which is delivered into the drum 20 through the connecting pipe 19. As the drum 20 rotates, the high-pressure nozzle 21 changes angle with the rotation of the drum 20, so that the high-pressure gas can be accurately sprayed into the filter bag 14. The impact force of the high-pressure gas blows the impurities in the filter bag 14 off and into the dirt collection chamber 15. The dirt collection chamber 15 collects the blown-off impurities. When it is necessary to discharge the impurities, the control box 2 opens the drain valve 8. Due to the pressure difference between the dirt collection chamber 15 and the outside, the impurities are discharged from the filter body 5 through the drain valve 8 under pressure.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-cleaning wastewater pretreatment device, comprising a filter body (5) and a filter chamber (11) disposed on the inner side of the middle of the filter body (5); The filter chamber (11) is provided with a bottom plate (17) on the upper and lower sides respectively. Multiple filter bags (14) are connected to the upper side of the bottom plate (17) on the lower side. A motor (1) is provided on the top upper side of the filter body (5). An inlet (9) is provided on the lower left side of the filter body (5). An outlet (6) is provided on the upper right side of the filter body (5). A differential pressure controller (7) is provided on the lower side of the outlet (6). The space below the bottom plate (17) is a sludge collection chamber (15), and a drain valve (8) is connected to the lower right side of the sludge collection chamber (15). A control box (2) is provided on the outer left side of the filter body (5); Its features are: The lower side of the motor (1) is connected to an output rod (12). A compressed air pump (13) is provided on the lower front side of the motor (1). A flushing arm (16) is provided on the lower outer side of the output rod (12). A roller (20) is provided inside the front side of the flushing arm (16). A high-pressure nozzle (21) is connected to the outside of the triangle of the roller (20). A rotating shaft (22) is sleeved and connected to one side of the roller (20) and the flushing arm (16). The output port (6) of the compressed air pump (13) is connected to the output rod (12) and the inside of the flushing arm (16), and a connecting pipe (19) is connected to the connection with the roller (20). The motor (1), differential pressure controller (7), drain valve (8) and compressed air pump (13) are electrically connected to control box (2), which is powered by an external power source.

2. The self-cleaning wastewater pretreatment device according to claim 1, characterized in that: The output rod (12) is movably connected to the bottom of the filter body (5), and the output rod (12) can rotate inside the filter body (5).

3. The self-cleaning wastewater pretreatment device according to claim 2, characterized in that: The flushing arm (16) and the output rod (12) are fixedly connected. The compressed air pump (13) is externally connected to the output rod (12) of the motor (1) by bolt connection. A mounting base (18) is provided at the upper connection between the motor (1) and the filter body (5).

4. The self-cleaning wastewater pretreatment device according to claim 3, characterized in that: The roller (20) is a cylindrical shape with equidistant concave and convex surfaces on the outside and hollow inside. The concave and convex outer surfaces of the roller (20) and the lower bottom plate (17) are provided with interlocking concave and convex grooves.

5. The self-cleaning wastewater pretreatment device according to claim 4, characterized in that: The roller (20) can rotate on the base plate (17) through the grooves. The position of the high pressure nozzle (21) on the outside of the roller (20) corresponds to the position of the filter bag (14) on the upper side of the base plate (17). When the roller (20) rotates, at least one of the high-pressure nozzles (21) is located inside the corresponding filter bag (14).

6. The self-cleaning wastewater pretreatment device according to claim 5, characterized in that: A pressure gauge fixing connection seat (3) is provided on the upper right side of the filter body (5), an exhaust port (4) is provided on the upper left side of the filter body (5), and fixing seats (10) for fixing and supporting are respectively provided on the four outer corners of the lower side of the filter body (5).

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