Self-cleaning filter for sewage treatment

Abstract

The application relates to the technical field of sewage treatment, in particular to a self-cleaning filter for sewage treatment. The filter cylinder is convenient for sewage to enter a containing cavity for corresponding filtration. The filter assembly is used for intercepting and filtering suspended matters and particulate matters in the sewage entering the containing cavity from a water inlet pipe. The scraper is used for shoveling the suspended matters and particulate matters intercepted on the inner wall surface of the filter assembly. The suction member is used for timely sucking and discharging the suspended matters and particulate matters shoveling in the filter assembly under the cooperation of the internal and external pressure differences. The driving assembly is convenient for the internal cleaning assembly of the filter cylinder to rotate and scrape the particulate matters and suspended matters filtered and intercepted on the inner wall surface of the filter assembly. When the internal pressure of the intercepting net cylinder and the external pressure of the middle cabin in the filter cylinder reach a set pressure difference, the electromagnetic valve controls the opening of the residue discharging pipe, the scraper scrapes the inner wall surface of the intercepting net cylinder, and the suction hopper is used for sucking and discharging the suspended matters and particulate matters scraped, so that self-cleaning is realized without stopping filtration.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, specifically a self-cleaning filter for wastewater treatment. Background Technology

[0002] During the raw water pretreatment process at municipal wastewater treatment plants, it is necessary to intercept suspended solids and particulate matter in the water, reduce turbidity of the effluent, improve the efficiency of subsequent treatment, reduce equipment wear, and achieve automated continuous operation. However, during long-term operation, sludge, suspended solids, and flocculated impurities easily accumulate on the surface of the filter components in integrated wastewater treatment equipment. This not only causes filter pore blockage and reduces water purification efficiency, but also leads to increased turbidity in the effluent and a significant decrease in the removal of suspended solids and particulate matter from the water. Most existing wastewater treatment equipment requires manual disassembly to remove the filter screen for cleaning, which is not only cumbersome and costly to maintain, but also prone to incomplete cleaning. Some equipment has insufficient water pressure in its built-in flushing structure, which cannot achieve a comprehensive flushing of the inner and outer sides of the filter components. After long-term use, impurities may still remain and clump together, affecting the continuous and stable operation of the equipment. Shutting down the machine to clean the filter screen delays wastewater treatment and increases the time required for wastewater treatment. Summary of the Invention

[0003] The purpose of this application is to provide a self-cleaning filter for wastewater treatment to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the following technical solution is provided in this application: A self-cleaning filter for wastewater treatment includes a filter cartridge, wherein the filter cartridge has a receiving cavity inside, which facilitates wastewater to enter the receiving cavity for corresponding filtration. The inlet pipe is located at the top of the outer wall of the filter cylinder and communicates with the receiving cavity, and is used to guide the sewage to be filtered from the inlet pipe into the receiving cavity; The water outlet pipe is located in the middle of the outer wall of the filter cylinder and is connected to the receiving cavity, so that the wastewater containing suspended solids and particulate matter filtered inside the receiving cavity can be guided out of the water outlet pipe. The slag discharge pipe is located at the bottom of the outer wall of the filter cylinder and communicates with the receiving cavity, so that the suspended solids and particulate matter filtered inside the receiving cavity can be concentrated and discharged from the slag discharge pipe. The filter assembly is installed inside the filter cylinder and has an opening at the top. The filter assembly is used to intercept and filter suspended solids and particulate matter in the sewage that enters the containment chamber from the inlet pipe. The cleaning component is installed inside the filter cartridge and is rotatably connected to the filter cartridge. The cleaning component has a scraper and an adsorption component. The scraper scrapes up the suspended solids and particulate matter intercepted on the inner wall of the filter cartridge. The adsorption component extracts and discharges the suspended solids and particulate matter scraped up inside the filter cartridge in a timely manner under the pressure difference between the inside and outside. The adsorption component is equipped with a discharge port. The drive assembly is located above the filter cartridge. The drive assembly is used to drive the cleaning assembly to rotate, so that the cleaning assembly inside the filter cartridge can rotate and scrape the particles and suspended matter filtered and intercepted on the inner wall of the filter assembly.

[0005] Furthermore, a first limiting ring is provided at the top of the outer wall of the filter cylinder, and a plurality of first through holes are provided on the first limiting ring. A first arc-shaped groove is provided on the upper surface of the first limiting ring near the inner side.

[0006] In this application, the first limiting ring provides a point of leverage, which helps the upper drive component to be inserted and installed. In addition, the first arc-shaped groove, in conjunction with the corresponding sealing element, increases the sealing performance of the combination between the drive component and the filter cartridge.

[0007] Secondly, the inner wall of the filter cartridge is symmetrically provided with baffles, which divide the internal cavity of the filter cartridge into three compartments.

[0008] In this application, with the cooperation of baffles, the internal space of the filter cartridge is divided. The upper chamber guides the sewage to be filtered into the interior, the middle chamber separates the filtered sewage, the center of the middle chamber filters and intercepts suspended solids and particulate matter in the sewage, the outer layer guides the filtered sewage into the outlet pipe, and the lower chamber is used for the corresponding sludge discharge pipe to pass through and guides the corresponding filtered suspended solids and particulate matter to be discharged.

[0009] The filter cartridge has a control box on its outer wall. The control box contains a processor, a power module, an input signal acquisition circuit, an output drive execution circuit, a human-machine interface, and a terminal block. The power module is electrically connected to an external power source through wires to continuously supply power to the whole system. The filter cartridge also has two sets of pressure sensors. One set of pressure sensors extends into the middle chamber, and the other set extends into the upper chamber.

[0010] It should be noted that the drive assembly includes a sealing cover and a drive motor. The drive motor is fixedly connected to the top of the sealing cover by bolts. The output shaft of the drive motor is connected to a drive shaft through a coupling. The drive shaft extends into the filter cartridge.

[0011] In this application, the drive motor is electrically connected to the processor in the control box via wires. The processor monitors the pressure difference between two pressure sensors. When the pressure difference reaches a set threshold, the processor controls the corresponding drive motor to start, thereby enabling the output shaft to drive the drive shaft to rotate.

[0012] Specifically, a second limiting ring is provided on the outer wall of the sealing cover at a position corresponding to the first limiting ring. The second limiting ring has several second through holes, and fastening bolts are provided in the second through holes. A second arc-shaped groove is provided on the lower surface of the second limiting ring, and a sealing gasket is provided in the second arc-shaped groove. An insert ring is provided at the bottom of the sealing cover.

[0013] In this application, the insert ring and the sealing cover are integrally formed. The insert ring is inserted into the inner wall of the filter cylinder, and the second limiting ring corresponds to the first limiting ring. The sealing gasket is the corresponding sealing element. The sealing gasket is respectively engaged with the first arc groove and the second arc groove to achieve a tight combination between the sealing cover and the filter cylinder, thereby increasing airtightness. The fastening bolts pass through the first through hole and the second through hole respectively, thereby increasing the stability of the combination between the sealing cover and the filter cylinder.

[0014] Furthermore, the filter assembly includes an intercepting mesh cylinder that passes through the upper baffle, and the bottom of the intercepting mesh cylinder is inserted and fixed to the lower baffle. The intercepting mesh cylinder is fixed to the upper baffle by bolts.

[0015] In this application, the filtration accuracy of the intercepting net cylinder is 4000μm-50μm. The top of the intercepting net cylinder is inserted into the upper baffle and fixed with bolts, and is plugged into the lower baffle. This allows the water in the upper chamber of the filter cylinder to be intercepted and filtered by the intercepting net cylinder and enter the middle chamber, thereby achieving the interception and filtration of suspended solids and particulate matter in the sewage.

[0016] It is worth noting that the cleaning component includes a drive rod and a connecting shaft. The connecting shaft and the drive rod are integrally formed. The top of the connecting shaft has a slot. The top of the outer wall of the drive rod has a limiting frame. The drive rod and the limiting frame are rotatably connected. The end of the limiting frame is fixedly connected to the filter cartridge. The drive rod has a flow guide chamber inside. The bottom of the outer wall of the drive rod has a positioning ring.

[0017] In this application, the slot is prismatic and matches the outer diameter of the drive shaft end. The drive shaft end is inserted into the slot, realizing the corresponding insertion and installation of the drive shaft and the connecting shaft. The drive rod is rotatably connected to the interception net cylinder. With the cooperation of the limit frame, the stability of the drive rod in the vertical direction is increased. With the cooperation of the positioning ring, the bottom of the drive rod is inserted and rotated correspondingly with the top of the interception net cylinder, preventing the drive rod from sliding down the interception net cylinder and affecting the cleaning process.

[0018] Secondly, the scraper component includes a support plate, which is connected to the drive rod via a connecting rod. The end of the support plate is provided with a scraper that fits against the inner wall of the interception net cylinder. The adsorption component includes a suction hopper, which has a suction port at its end, and the suction port communicates with the interior of the guide chamber.

[0019] In this application, the support plates are arranged in an alternating pattern, and with the help of the connecting rod, the stability of the combination with the drive rod is increased. The scraper is fixedly connected to the support plate by bolts, and the scraper is in the shape of an arc plate. The tip of the scraper is in close contact with the inner wall of the interception net cylinder. The scraper scrapes the suspended solids and particulate matter filtered and intercepted by the inner wall of the interception net cylinder. With the help of the suction hopper, the internal space of the suction hopper is connected to the inside of the guide chamber. The suspended solids and particulate matter intercepted inside the interception net cylinder block the inner wall, resulting in an increase in internal pressure. Under the action of the pressure difference between the inside and outside, the suspended solids and particulate matter scraped by the scraper enter the inside of the guide chamber from the suction port for adsorption and discharge.

[0020] In addition, the inlet pipe and outlet pipe are welded and fixed to the filter cylinder, the slag discharge pipe is equipped with a solenoid valve, the top of the slag discharge pipe extends into the inside of the filter cylinder, the bottom of the drive rod is inserted into the top of the slag discharge pipe, and the flow guide chamber is connected to the inside of the slag discharge pipe.

[0021] In this application, the inlet pipe is connected to an external sewage delivery pipe to guide the sewage to be filtered and intercepted into the filter cartridge. The outlet pipe is connected to an external discharge pipe to guide the filtered sewage to be discharged. The solenoid valve is electrically connected to the processor inside the control box through a wire. The processor receives the values ​​monitored by two pressure sensors. When the set threshold difference is reached, it controls the solenoid valve to open, so that the slag discharge pipe is connected to the outside, thereby guiding the corresponding flow chamber to connect with the outside. Under the pressure difference, the suspended solids and particulate matter adsorbed by the internal scraper are discharged.

[0022] Compared with the prior art, the beneficial effects of this application are: 1. In this application, the intercepting screen cylinder and the filter cylinder are installed by inserting two baffles. The drive rod with support plate and suction hopper is rotatably inserted into the intercepting screen cylinder, and the limit frame limits the top position of the drive rod. The sealing cover is matched with the drive motor. The sealing cover is inserted into the filter cylinder by the insertion ring and the sealing gasket. It is fixed by a combination of fastening bolts and nuts. The drive shaft on the output shaft of the drive motor is inserted into the top slot of the connecting shaft, so that the drive shaft drives the drive rod to rotate. When the pressure inside the intercepting screen cylinder and the pressure outside the middle chamber of the filter cylinder reach the set pressure difference, the solenoid valve controls the slag discharge pipe to open. The scraper scrapes the inner wall of the intercepting screen cylinder and works with the suction hopper to extract and discharge the suspended solids and particulate matter from the scraper, so as to achieve self-cleaning without stopping filtration.

[0023] 2. In this application, the water inlet pipe helps guide the sewage that needs to be filtered from the outside into the filter cartridge. The water inlet pipe is connected to the upper chamber of the filter cartridge, the water outlet pipe is connected to the middle chamber of the filter cartridge, the slag discharge pipe is connected to the lower chamber of the filter cartridge, the flow guide chamber is connected to the inside of the sludge suction hopper, and the inside of the flow guide chamber is connected to the inside of the slag discharge pipe. The solenoid valve controls the opening of the slag discharge pipe, so as to realize the connection between the flow guide chamber and the outside space, and realize the discharge and collection of suspended solids and particulate matter. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure in this application; Figure 2 This is an overall side view schematic diagram of this application; Figure 3 This is a schematic diagram of the filter cartridge structure in this application; Figure 4 This is a schematic diagram of the combined structure of the sealing cover and the drive motor in this application; Figure 5 This is a schematic cross-sectional view of the filter cartridge and cleaning component assembly in this application. Figure 6 This is a schematic diagram of the cleaning component structure in this application; Figure 7 This is a cross-sectional schematic diagram of the cleaning component in this application.

[0025] The meanings of the labels in the diagram are as follows: 1. Filter cartridge; 10. First limiting ring; 100. First arc-shaped groove; 101. First perforation; 11. Baffle; 12. Limiting frame; 2. Sealing cap; 20. Pressure gauge; 21. Second limiting ring; 210. Second through hole; 211. Fastening bolt; 212. Second arc groove; 22. Insert ring; 23. Sealing gasket; 3. Drive motor; 30. Drive shaft; 4. Water inlet pipe; 5. Water outlet pipe; 6. Slag discharge pipe; 60. Solenoid valve; 7. Drive rod; 70. Connecting shaft; 700. Slot; 71. Support plate; 710. Scraper; 72. Suction hopper; 720. Suction port; 73. Flow guide chamber; 74. Positioning ring; 8. Interception netting. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] Please see Figures 1-7 This embodiment provides a technical solution: A self-cleaning filter for wastewater treatment includes a filter cartridge 1, with a receiving cavity inside the filter cartridge 1 to facilitate wastewater entering the receiving cavity for corresponding filtration. Furthermore, a first limiting ring 10 is provided on the top of the outer wall of the filter cylinder 1. The first limiting ring 10 has several first through holes 101 and a first arc-shaped groove 100 is provided on the upper surface of the first limiting ring 10 near the inner side.

[0028] In this application, the first limiting ring 10 provides a point of leverage, which helps the upper drive component to be inserted and installed. In addition, with the cooperation of the first arc groove 100 and the corresponding seal, the sealing performance between the drive component and the filter cartridge 1 is increased.

[0029] Secondly, the inner wall of the filter cartridge 1 is symmetrically provided with baffles 11, which divide the internal cavity of the filter cartridge 1 into three compartments.

[0030] In this application, with the cooperation of baffle 11, the internal space of filter cylinder 1 is divided. The upper chamber guides the sewage to be filtered into the interior, the middle chamber distinguishes the sewage to be filtered, the center of the middle chamber filters and intercepts suspended solids and particulate matter in the sewage, the outer layer guides the filtered sewage into the outlet pipe 5, and the lower chamber is used for the corresponding sludge discharge pipe 6 to pass through, and guides the corresponding filtered and intercepted suspended solids and particulate matter to be discharged.

[0031] The filter cartridge 1 has a control box on its outer wall. The control box contains a processor, a power module, an input signal acquisition circuit, an output drive execution circuit, a human-machine interface, and a terminal block. The power module is electrically connected to an external power source through wires to continuously supply power to the whole system. The filter cartridge 1 also has two sets of pressure sensors. One set of pressure sensors extends to the middle chamber, and the other set of pressure sensors extends to the upper chamber.

[0032] Specifically, the drive assembly includes a sealing cover 2 and a drive motor 3. The drive motor 3 is fixedly connected to the top of the sealing cover 2 by bolts. The output shaft of the drive motor 3 is connected to a drive shaft 30 by a coupling. The drive shaft 30 extends into the filter cartridge 1.

[0033] Secondly, the inlet pipe 4 is located on the top of the outer wall of the filter cylinder 1 and is connected to the receiving cavity. It is used to guide the sewage to be filtered from the inlet pipe 4 into the receiving cavity. Next, the water outlet pipe 5 is located in the middle of the outer wall of the filter cylinder 1 and is connected to the receiving cavity, so that the wastewater containing suspended solids and particulate matter inside the receiving cavity can be guided out of the water outlet pipe 5. Furthermore, the slag discharge pipe 6 is located at the bottom of the outer wall of the filter cylinder 1 and communicates with the receiving cavity, so that the suspended solids and particulate matter filtered inside the receiving cavity can be concentrated and discharged from the slag discharge pipe 6. Specifically, the filter assembly is installed inside the filter cylinder 1. The top of the filter assembly has an opening. The filter assembly is used to intercept and filter suspended solids and particulate matter in the sewage that enters the containment chamber from the inlet pipe 4. Furthermore, the filter assembly includes a filter cylinder 8 that passes through the upper baffle 11 and is fixedly inserted into the lower baffle 11 at its bottom. The filter cylinder 8 is also fixed to the upper baffle 11 by bolts.

[0034] In this application, the filtration accuracy of the intercepting net cylinder 8 is 4000μm-50μm. The top of the intercepting net cylinder 8 is inserted into the upper baffle 11 and fixed with bolts, and is plugged into the lower baffle 11 to achieve the interception and filtration of water in the upper chamber of the filter cylinder 1 into the middle chamber through the intercepting net cylinder 8, thereby achieving the interception and filtration of suspended solids and particulate matter in the sewage.

[0035] It should be noted that the cleaning component is set inside the filter cylinder 1 and is rotatably connected to the filter component. The cleaning component has a scraper and an adsorption component. The scraper scrapes up the suspended matter and particulate matter intercepted on the inner wall of the filter component. The adsorption component extracts and discharges the suspended matter and particulate matter scraped up inside the filter component in a timely manner under the pressure difference between the inside and outside. The adsorption component is equipped with a discharge port. Furthermore, the cleaning component includes a drive rod 7 and a connecting shaft 70. The connecting shaft 70 and the drive rod 7 are integrally formed. The top of the connecting shaft 70 is provided with a slot 700. The top of the outer wall of the drive rod 7 is provided with a limiting frame 12. The drive rod 7 and the limiting frame 12 are rotatably connected. The end of the limiting frame 12 is fixedly connected to the filter cartridge 1. The drive rod 7 is provided with a flow guide chamber 73 inside. The bottom of the outer wall of the drive rod 7 is provided with a positioning ring 74.

[0036] In this application, the slot 700 is prismatic and matches the outer diameter of the end of the drive shaft 30. The end of the drive shaft 30 is inserted into the slot 700, so that the drive shaft 30 and the connecting shaft 70 are inserted and installed accordingly. The drive rod 7 is rotatably connected to the interception net cylinder 8. With the cooperation of the limit frame 12, the stability of the drive rod 7 in the vertical direction is increased. With the cooperation of the positioning ring 74, the bottom of the drive rod 7 is inserted and rotated with the top of the interception net cylinder 8, so as to avoid the drive rod 7 sliding down the interception net cylinder 8 and affecting the cleaning cooperation.

[0037] Secondly, the scraper includes a support plate 71, which is connected to the drive rod 7 via a connecting rod. The end of the support plate 71 is provided with a scraper 710 that fits against the inner wall of the interception net cylinder 8. The adsorption component includes a suction hopper 72, which has a suction port 720 at its end. The suction port 720 is connected to the interior of the guide chamber 73.

[0038] In this application, the support plates 71 are arranged in an alternating pattern, and with the cooperation of the connecting rod, the stability of the combination with the drive rod 7 is increased. The scraper 710 is fixedly connected to the support plates 71 by bolts, and the scraper 710 is in the shape of an arc plate. The tip of the scraper 710 is in close contact with the inner wall of the interception net cylinder 8, and scrapes the suspended solids and particulate matter filtered and intercepted by the inner wall of the interception net cylinder 8. With the cooperation of the suction hopper 72, the internal space of the suction hopper 72 is connected to the inside of the guide chamber 73. The suspended solids and particulate matter intercepted inside the interception net cylinder 8 block the inner wall, resulting in an increase in internal pressure. Under the action of the pressure difference between the inside and outside, the suspended solids and particulate matter scraped by the scraper enter the inside of the guide chamber 73 from the suction port 720 for adsorption and discharge.

[0039] It is worth adding that the drive component is located above the filter cartridge 1. The drive component is used to drive the cleaning component to rotate, so that the cleaning component inside the filter cartridge 1 can rotate and scrape the particles and suspended cleaning material filtered and intercepted on the inner wall of the filter component.

[0040] In this application, the drive motor 3 is electrically connected to the processor in the control box via a wire. The processor monitors the pressure difference between two pressure sensors. When the pressure difference reaches a set threshold, the processor controls the corresponding drive motor 3 to start, so that the output shaft drives the drive shaft 30 to rotate.

[0041] Specifically, a second limiting ring 21 is provided on the outer wall of the sealing cover 2 at a position corresponding to the first limiting ring 10. Several second through holes 210 are provided on the second limiting ring 210, and fastening bolts 211 are provided in the second through holes 210. A second arc-shaped groove 212 is provided on the lower surface of the second limiting ring 212, and a sealing gasket 23 is provided in the second arc-shaped groove 212. An insert ring 22 is provided at the bottom of the sealing cover 2.

[0042] In this application, the insert ring 22 and the sealing cover 2 are integrally formed. The insert ring 22 is inserted into the inner wall of the filter cylinder 1, and the second limiting ring 21 corresponds to the first limiting ring 10. The sealing gasket 23 is the corresponding sealing element. The sealing gasket 23 is respectively engaged with the first arc groove 100 and the second arc groove 212 to achieve a tight combination between the sealing cover 2 and the filter cylinder 1, thereby increasing airtightness. The fastening bolts 211 pass through the first through hole 101 and the second through hole 210 respectively, thereby increasing the stability of the combination between the sealing cover 2 and the filter cylinder 1.

[0043] Secondly, a pressure gauge 20 is also provided on the top of the sealing cover 2. One end of the pressure gauge 20 extends into the filter cartridge 1, so as to display the pressure value change inside the filter cartridge 1 in the upper chamber in real time.

[0044] In addition, the inlet pipe 4 and outlet pipe 5 are welded and fixed to the filter cylinder 1 respectively. The slag discharge pipe 6 is equipped with a solenoid valve 60. The top of the slag discharge pipe 6 extends into the inside of the filter cylinder 1. The bottom of the drive rod 7 is inserted into the top of the slag discharge pipe 6, and the flow guide chamber 73 is connected to the inside of the slag discharge pipe 6.

[0045] In this application, the inlet pipe 4 is connected to an external sewage delivery pipe to guide the sewage to be filtered and intercepted into the filter cartridge 1. The outlet pipe 5 is connected to an external discharge pipe to guide the filtered sewage to be discharged. The solenoid valve 60 is electrically connected to the processor inside the control box through a wire. The processor receives the values ​​monitored by the two pressure sensors. After the set threshold difference is reached, it controls the solenoid valve 60 to open, so that the slag discharge pipe 6 is connected to the outside, thereby guiding the corresponding flow guide chamber 73 to be connected to the outside. Under the pressure difference, the suspended solids and particulate matter adsorbed by the internal scraper are discharged.

[0046] In this embodiment, the self-cleaning filter for wastewater treatment is used by first assembling and fixing the two baffles 11 with the filter cylinder 1, then inserting the intercepting mesh cylinder 8 into the filter cylinder 1. The intercepting mesh cylinder 8 passes through the upper baffle 11 and is inserted into the lower baffle 11. The sludge discharge pipe 6 with a solenoid valve 60 is fixedly connected to the bottom of the filter cylinder 1. The drive rod 7 with a support plate 71 and a suction hopper 72 is inserted into the inside of the intercepting mesh cylinder 8, and the top of the drive rod 7 is rotatably connected to the limiting frame 12. The bottom of the drive rod 7 passes through the intercepting mesh cylinder 8 and extends into the inside of the sludge discharge pipe 6. The positioning ring 74 at the bottom of the drive rod 7 limits... The sealing cover 2 is inserted into the top of the filter cylinder 1 via the insertion ring 22, and the sealing gasket 23 connects the first arc groove 100 and the second arc groove 212. The drive motor 3 is fixed on the top of the sealing cover 2, and the bottom of the drive shaft 30 on the drive motor 3 is inserted into the corresponding slot 700 on the top of the drive rod 7 via the locking pin. The fastening bolt 211 passes through the second through hole 210 and the first through hole 101 in sequence, and with the cooperation of the nut, the fastening bolt 211 fixes the sealing cover 2 and the filter cylinder 1. The control box with the control button is fixed to the outer wall of the filter cylinder 1. The inlet pipe 4 is connected to the external sewage discharge pipe that needs to intercept and filter suspended solids and particulate matter. The sewage enters the upper chamber at the top of the filter cylinder 1, and then, with the cooperation of the interception net cylinder 8, it intercepts and filters suspended solids and particulate matter. After filtration, the sewage passes through the interception net cylinder 8 and enters the middle chamber between the inner wall of the filter cylinder 1 and the interception net cylinder 8. Then, with the cooperation of the outlet pipe 5, it is connected to the external discharge pipe to centrally guide the filtered sewage. A pressure gauge 20 is installed on the top of the sealing cover 2, working in conjunction with a pressure sensor to monitor the water pressure in the filter chamber inside the intercepting net cylinder 8 in real time. A pressure sensor is also installed on the outer wall of the filter cylinder 1 to monitor the water pressure in the middle chamber between the outer wall of the intercepting net cylinder 8 and the inner wall of the filter cylinder 1. When the pressure difference between the filter chamber and the middle chamber reaches a set threshold, the values ​​monitored by the two pressure sensors are transmitted to the processor inside the control box. The processor then starts the drive motor 3, and the overall sewage filtration and interception operation continues. The drive shaft 30 drives the drive rod 7 to rotate, and the scraper 710 on the end of the support plate 71 scrapes against the inner wall of the intercepting net cylinder 8. Simultaneously, the control box... The internal processor controls the opening of the solenoid valve 60, enabling the slag discharge pipe 6 to connect with the inside of the guide chamber 73. The pressure inside the filter chamber of the intercepting net cylinder 8 is greater than that of the external environment. With the connection between the guide chamber 73 and the slag discharge pipe 6, and in conjunction with atmospheric pressure, the suction port 720 can promptly absorb and discharge the sludge scraped from the inner wall of the intercepting net cylinder 8, avoiding blockage of the inner wall surface of the intercepting net cylinder 8 and affecting continuous filtration and interception. The inner wall of the intercepting net cylinder 8 is cleaned by scraping without opening the sealing cover 2. At the same time, multiple equally spaced support plates 71 and suction hoppers 72 thoroughly scrape the inner wall of the intercepting net cylinder 8, and the whole system continuously filters and intercepts sewage without stopping the machine, reducing the cleaning time.

Claims

1. A self-cleaning filter for wastewater treatment, characterized in that, include: The filter cylinder (1) has an internal cavity for facilitating the entry of wastewater into the cavity for filtration. Water inlet pipe (4) is installed on the top of the outer wall of the filter cylinder (1) and communicates with the receiving cavity to guide the sewage to be filtered from the water inlet pipe (4) into the receiving cavity; The outlet pipe (5) is located in the middle of the outer wall of the filter cylinder (1) and is connected to the receiving cavity, so that the sewage containing suspended solids and particulate matter inside the receiving cavity can be guided out of the outlet pipe (5); The slag discharge pipe (6) is located at the bottom of the outer wall of the filter cylinder (1) and communicates with the receiving cavity, so that the suspended solids and particulate matter filtered inside the receiving cavity can be concentrated and discharged from the slag discharge pipe (6). The filter assembly is installed inside the filter cylinder (1). The top of the filter assembly has an opening. The filter assembly is used to intercept and filter suspended solids and particulate matter in the sewage that enters the containment chamber from the inlet pipe (4). The cleaning component is set inside the filter cylinder (1) and is rotatably connected to the filter component. The cleaning component has a scraper and an adsorption component. The scraper scrapes up the suspended matter and particulate matter intercepted on the inner wall of the filter component. The adsorption component extracts and discharges the suspended matter and particulate matter scraped up in the filter component in a timely manner under the pressure difference between the inside and outside. The adsorption component is equipped with a discharge port. The drive assembly is located above the filter cylinder (1). The drive assembly is used to drive the cleaning assembly to rotate, so that the cleaning assembly inside the filter cylinder (1) can rotate and scrape the particles and suspended cleaning intercepted by the filter assembly on the inner wall surface.

2. The self-cleaning filter for wastewater treatment according to claim 1, characterized in that: The filter cylinder (1) has a first limiting ring (10) at the top of its outer wall. The first limiting ring (10) has several first through holes (101) and a first arc groove (100) is provided on the upper surface of the first limiting ring (10) near the inner side.

3. The self-cleaning filter for wastewater treatment according to claim 1, characterized in that: The filter cylinder (1) has baffles (11) symmetrically arranged on the inner wall, and the baffles (11) divide the internal cavity of the filter cylinder (1) into three compartments.

4. The self-cleaning filter for wastewater treatment according to claim 1, characterized in that: The drive assembly includes a sealing cover (2) and a drive motor (3). The drive motor (3) is fixedly connected to the top of the sealing cover (2) by bolts. The output shaft of the drive motor (3) is connected to a drive shaft (30) by a coupling. The drive shaft (30) extends into the filter cartridge (1).

5. The self-cleaning filter for wastewater treatment according to claim 4, characterized in that: The sealing cover (2) has a second limiting ring (21) on its outer wall surface corresponding to the first limiting ring (10). The second limiting ring (21) has several second through holes (210). The second through holes (210) have fastening bolts (211). The lower surface of the second limiting ring (21) has a second arc groove (212). The second arc groove (212) has a sealing gasket (23). The bottom of the sealing cover (2) has a plug ring (22).

6. The self-cleaning filter for wastewater treatment according to claim 3, characterized in that: The filter assembly includes an intercepting mesh cylinder (8) that passes through the upper baffle (11) and is fixedly inserted to the lower baffle (11) at its bottom. The intercepting mesh cylinder (8) is fixed to the upper baffle (11) by bolts.

7. The self-cleaning filter for wastewater treatment according to claim 6, characterized in that: The cleaning component includes a drive rod (7) and a connecting shaft (70). The connecting shaft (70) and the drive rod (7) are integrally formed. The top of the connecting shaft (70) is provided with a slot (700). The top of the outer wall of the drive rod (7) is provided with a limiting frame (12). The drive rod (7) and the limiting frame (12) are rotatably connected. The end of the limiting frame (12) is fixedly connected to the filter cartridge (1). The drive rod (7) is provided with a flow guide chamber (73) inside. The bottom of the outer wall of the drive rod (7) is provided with a positioning ring (74).

8. The self-cleaning filter for wastewater treatment according to claim 7, characterized in that: The scraper includes a support plate (71), which is connected to the drive rod (7) via a connecting rod. The end of the support plate (71) is provided with a scraper (710) that fits against the inner wall of the interception net cylinder (8). The adsorption component includes a suction hopper (72), which has a suction port (720) at its end. The suction port (720) is connected to the interior of the flow guide chamber (73).

9. The self-cleaning filter for wastewater treatment according to claim 7, characterized in that: The inlet pipe (4) and outlet pipe (5) are welded and fixed to the filter cylinder (1) respectively. The slag discharge pipe (6) is equipped with a solenoid valve (60). The top end of the slag discharge pipe (6) extends into the filter cylinder (1). The bottom of the drive rod (7) is inserted into the top of the slag discharge pipe (6), and the flow guide chamber (73) is connected to the inside of the slag discharge pipe (6).

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