A cleaning device and cleaning method for sewage treatment filtration system

Abstract

The present invention provides a cleaning device for a sewage treatment filter system applied in the technical field of sewage treatment. The blower (3) of the cleaning device for the sewage treatment filter system is connected to one end of a connecting pipe I (4), the other end of the connecting pipe I (4) extends into a filter system housing (1), the other end of the connecting pipe I (4) is connected to an aeration pipe (5) located below an impurity filter layer (2), the part of the filter system housing (1) located below a multi-media impurity filter layer (2) is connected to a clean water storage tank (7) through a connecting pipe II (6), and a backwashing water pump (8) is arranged on the connecting pipe II (6). The cleaning device for the sewage treatment filter system of the present invention performs joint backwashing on the filter system when the sewage treatment filter system is blocked and the filtering efficiency and filtering quality are affected, thereby effectively improving the backwashing efficiency and reducing the backwashing cost, and returning the backwashed sewage to the sewage source without secondary pollution.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and more specifically, relates to a cleaning device for a sewage treatment filter system. The present invention also relates to a cleaning method for a sewage treatment filter system. Background Art

[0002] In the process of sewage treatment, sewage treatment equipment is needed. The filter layer in the sewage treatment equipment is often composed of activated carbon, quartz sand and other materials to filter large particles of organic matter or flocs in the sewage. The long-term use of colloids, flocs and other sediments in the filter layer will clog the pores of the filter layer, or make the filter medium compacted, and the filtration speed and water purification effect will decrease. At present, water washing is mainly done by water pump water washing, which can only wash some large-particle sediments. It has limited effect on colloidal flocs with strong adhesion, and uses tap water, which takes a long time to wash, and seriously wastes water resources. The general air washing process is easy to disrupt other filter media layers such as quartz sand of different particle sizes, and the effect of layered filtration becomes worse. At the same time, when manually observing the water quality and cleaning it manually, there are not only large errors in water quality judgment, but also human safety hazards such as improper operation. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a cleaning device for a sewage treatment filtration system with a simple structure, which can perform joint backwashing on the filtration system when the filtration system for sewage treatment is blocked and affects the filtration efficiency and filtration quality, thereby effectively improving the backwashing efficiency, reducing the backwashing cost, and returning the backwashed sewage to the sewage source without the problem of secondary pollution.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0005] The present invention is a cleaning device for a sewage treatment filter system. The sewage treatment filter system comprises a filter system shell, an impurity filter layer is arranged in the filter system shell, and the cleaning device for the sewage treatment filter system comprises a blower and an aeration pipe. The blower is connected with one end of a connecting pipe I, the other end of the connecting pipe I extends into the filter system shell, the other end of the connecting pipe I is connected with the aeration pipe located below the impurity filter layer, the filter system shell portion located below the multi-media impurity filter layer is connected with a clean water storage tank through a connecting pipe II, and a backwash water pump is arranged on the connecting pipe II.

[0006] The blower, backwash water pump, inlet turbidity meter I and inlet turbidity meter II are respectively connected to the control component. The control component is connected to the alarm light.

[0007] The filter system shell portion located above the impurity filter layer is connected to one end of the sewage inlet pipe, the other end of the sewage inlet pipe is connected to the sewage source, a sewage inlet pipe solenoid valve is arranged on the sewage inlet pipe, and the sewage inlet pipe solenoid valve is connected to the control component.

[0008] A water quality monitoring pipeline I is arranged at the portion of the filtration system shell located above the impurity filtration layer, on which an inlet turbidity meter I is installed; a water quality monitoring pipeline II is arranged at the portion of the filtration system shell located below the impurity filtration layer, on which an inlet turbidity meter II is installed.

[0009] The aeration pipe is arranged as a circular pipe structure, each end of the aeration pipe is a closed structure, and a plurality of explosion holes are arranged on the aeration pipe at intervals.

[0010] A solenoid valve I is installed at the position of the connecting pipeline I between the blower and the filter system housing, and the solenoid valve I is connected to the control component.

[0011] A solenoid valve II is arranged on the connecting pipeline II between the reverse water pump and the filter system housing, and the solenoid valve II is connected to the control component.

[0012] The cleaning device for the sewage treatment filtration system also includes a cleaning and recovery cylinder, an external threaded portion is arranged on the upper part of the filtration system shell, the cleaning and recovery cylinder includes a cylinder body, the cylinder body is arranged to have an arc-shaped structure, a trumpet-shaped connecting inlet is arranged at one end of the cylinder body, an internal threaded portion is arranged on the inner surface of the lower end of the connecting inlet, and a receiving cylinder is arranged at the other end of the cylinder body.

[0013] The impurity filtering layer includes a first filter layer, a second filter layer, a third filter layer, and a fourth filter layer. The first filter layer, the second filter layer, the third filter layer, and the fourth filter layer are arranged in gaps from top to bottom, and the filter holes of each layer of the first filter layer, the second filter layer, the third filter layer, and the fourth filter layer decrease in sequence from top to bottom.

[0014] The present invention also relates to a method for cleaning a filter system for sewage treatment, and the cleaning steps of the method for cleaning a filter system for sewage treatment are as follows: 1) an inlet turbidity meter II monitors the water quality of water filtered by a filter system housing in real time, and when the actual value of the filtered water measured by the inlet turbidity meter II exceeds the standard value stored in a control component, the control component alarms, and the control component controls the sewage inlet pipeline solenoid valve on the sewage inlet pipeline to close, and stops inputting sewage into the filter system housing; 2) the control component controls the blower to turn on, and the gas is released through the aeration pipe, so that the adhered dirt falls off and is scattered from the impurity filter layer; 3) after the blower works for 15min-20min, the control component will control the backwash water pump to start again, and the backwash water pump pumps the clean water storage tank into the filter system housing, and then flushes the impurity filter layer from the bottom of the impurity filter layer upward, so that the adhered dirt is separated from the impurity filter layer under the high-pressure water flushing and enters the cleaning recovery cylinder.

[0015] By adopting the technical solution of the present invention, the following beneficial effects can be obtained:

[0016] The cleaning device for the sewage treatment filter system of the present invention starts the cleaning device for the sewage treatment filter system when the impurity filter layer in the filter system housing is clogged due to dirt adhesion. The cleaning device for the sewage treatment filter system first controls the blower to start, and the wind generated by the blower enters the filter system housing and is ejected from the aeration holes of the aeration pipe located below the impurity filter layer, applying high-pressure impact gas below the impurity filter layer. The high-pressure impact gas causes the dirt adhered to the impurity filter layer to fall off. For example, the colloids and flocculants attached to the filter layer fall off, and at the same time, the high-pressure gas causes the compacted dirt to become loose, and the flocculants or colloids rub and collide with each other, and the large particles or clumping blockages are broken up and decomposed, and the blockages and loose dirt are broken up and decomposed. After the blower has been working for a period of time, the cleaning device for the sewage treatment filter system will control the backwater pump to start again. The backwater pump pumps the clean water in the clean water storage tank storing the filtered clean water to impact the impurity filter layer in a high-pressure manner, and the decomposed blockages and loose dirt are impacted by high-pressure water, leaving the impurity filter layer (filter layer), and are impacted to leave the filter layer, and then various dirt returns to the sewage water source for precipitation, which is convenient for later cleaning. In this way, the cleaning effect of the filter layer is effectively improved. And clean water will not be wasted, saving water resources. The cleaning device for the sewage treatment filter system described in the present invention has a simple structure. When the sewage treatment filter system is blocked and affects the filtration efficiency and filtration quality, the filter system can be combined with backwashing, thereby effectively improving the backwashing efficiency, reducing the backwashing cost, and returning the backwashed sewage to the sewage water source. There is no secondary pollution problem, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents and symbols in the drawings of this specification:

[0018] Figure 1 It is a structural schematic diagram of the cleaning device for the sewage treatment and filtration system according to the present invention;

[0019] Figure 2 This is a schematic diagram of the aeration pipe structure of the cleaning device for the sewage treatment filtration system according to the present invention;

[0020] Figure 3 It is a structural schematic diagram of another embodiment of the cleaning device for the sewage treatment and filtering system according to the present invention;

[0021] The markings in the attached drawings are as follows: 1. filtration system housing; 2. impurity filter layer; 3. blower; 4. connecting pipeline Ⅰ; 5. aeration pipe; 6. connecting pipeline Ⅱ; 7. clean water storage tank; 8. backwash water pump; 9. water quality monitoring pipeline Ⅰ; 10. inlet turbidity meter Ⅰ; 11. water quality monitoring pipeline Ⅱ; 12. inlet turbidity meter Ⅱ; 13. control component; 14. explosion hole; 15. solenoid valve Ⅰ; 16. solenoid valve Ⅱ; 17. sewage inlet pipeline; 18. sewage water source; 19. sewage inlet pipeline solenoid valve; 20. cleaning recovery cylinder; 21. cylinder body; 22. connecting inlet; 23. receiving cylinder; 24. first filter layer; 25. second filter layer; 26. third filter layer; 27. fourth filter layer; 28. clean water storage tank level gauge; 29. ​​on-off solenoid valve of turbidity meter Ⅰ; 30. on-off solenoid valve of turbidity meter Ⅱ. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the specific implementation of the present invention, such as the shape, structure, mutual position and connection relationship between the various components involved, the function and working principle of each part, etc., through the description of the embodiments with reference to the accompanying drawings:

[0023] As attached Figure 1 , Attachment Figure 2As shown, the present invention is a cleaning device for a sewage treatment filter system, the sewage treatment filter system comprises a filter system housing 1, an impurity filter layer 2 is arranged in the filter system housing 1, the cleaning device for the sewage treatment filter system comprises a blower 3 and an aeration pipe 5, the blower 3 is connected with one end of the connecting pipe Ⅰ4, the other end of the connecting pipe Ⅰ4 extends into the filter system housing 1, the other end of the connecting pipe Ⅰ4 is connected with the aeration pipe 5 located below the impurity filter layer 2, the part of the filter system housing 1 located below the multi-media impurity filter layer 2 is connected with the clean water storage tank 7 through the connecting pipe Ⅱ6, and a backwash water pump 8 is arranged on the connecting pipe Ⅱ6. With the above structure, when the impurity filter layer in the filter system housing is blocked due to the adhesion of dirt, the cleaning device for the sewage treatment filter system is started, and the cleaning device for the sewage treatment filter system will first control the blower to start, and the wind generated by the blower enters the filter system housing, and is ejected from the aeration hole of the aeration pipe located below the impurity filter layer, applying high-pressure impact gas below the impurity filter layer, and the high-pressure impact gas causes the dirt adhered to the impurity filter layer to fall off. For example, the colloids and flocculants attached to the filter layer fall off, and the high-pressure gas loosens the compacted dirt, rubs and collides with the flocculants or colloids, and the large particles or agglomerated blockages are broken up and decomposed. The blockages and loose dirt are broken up and decomposed. After the blower has been working for a period of time, the sewage treatment filtration system will control the start of the backwater pump with a cleaning device. The backwater pump pumps the clean water in the clean water storage tank where the filtered clean water is stored to impact the impurity filter layer with high pressure, and the broken up and decomposed blockages and loose dirt are impacted by the high-pressure water, leaving the impurity filter layer (filter layer), and are impacted to leave the filter layer, and then various dirt returns to the sewage source (sewage placement pool) for precipitation, which is convenient for later cleaning. In this way, the cleaning effect of the filter layer is effectively improved. And clean water will not be wasted, saving water resources. The cleaning device for the sewage treatment filtration system described in the present invention has a simple structure. When the sewage treatment filtration system is blocked and affects the filtration efficiency and filtration quality, the filtration system can be jointly backwashed, thereby effectively improving the backwashing efficiency and reducing the backwashing cost. The backwashed sewage can be returned to the sewage source without secondary pollution problems, thus saving costs.

[0024] The blower 3, backwash water pump 8, inlet turbidity meter I 10, and inlet turbidity meter II 12 are respectively connected to the control component 13. The above structure, through the control component, enables the blower 3, backwash water pump 8, inlet turbidity meter I 10, and inlet turbidity meter II 12 to be connected to the control component 13 respectively, thereby facilitating the completion of each step and effectively meeting the cleaning requirements of the filter layer.

[0025] The part of the filter system housing 1 located above the impurity filter layer 2 is connected to one end of the sewage inlet pipe 17, and the other end of the sewage inlet pipe 17 is connected to the sewage water source 18. The sewage inlet pipe solenoid valve 19 is arranged on the sewage inlet pipe 17, and the sewage inlet pipe solenoid valve 19 is connected to the control component 13. With the above structure, when the cleaning device for the sewage treatment filter system works normally, the sewage is pumped from the sewage water source into the filter system housing by the water pump in the sewage water source, and then falls, is filtered through the impurity filter layer, and then enters the clean water storage tank 7 from the connecting pipe II6 to be collected and stored. The clean water stored in the clean water storage tank 7 is convenient for secondary use.

[0026] A water quality monitoring pipeline Ⅰ9 is arranged at the part of the filter system housing 1 located above the impurity filter layer 2, and an inlet turbidity meter Ⅰ10 is installed on the water quality monitoring pipeline Ⅰ9. A water quality monitoring pipeline Ⅱ11 is arranged at the part of the filter system housing 1 located below the impurity filter layer 2, and an inlet turbidity meter Ⅱ12 is installed on the water quality monitoring pipeline Ⅱ11. In the above structure, the inlet turbidity meter Ⅰ10 and the inlet turbidity meter Ⅱ12 respectively monitor the water quality turbidity of different parts in the filter system in real time, and feed back the data to the control component in real time to achieve reliable monitoring. When the water quality of the effluent from the filter layer deteriorates, the real-time value detected by the inlet turbidity meter Ⅱ12 will be higher than the standard value stored in the control component, that is, the value of the online turbidity detector exceeds the standard, which means that there are too many impurities in the filter layer (filter), affecting normal filtration and needing to be cleaned. When cleaning the filter layer in the filter system housing, it is necessary to first close the sewage inlet pipeline solenoid valve 19 so that the water level of the filter layer is kept below the filter layer before flushing. In this way, even when the blower is blowing, the filter layer is in the water.

[0027] The aeration pipe 5 is configured as a circular pipe structure, each end of the aeration pipe 5 is a closed structure, and a plurality of explosion holes 14 are provided at intervals on the aeration pipe 5. In the above structure, the plurality of aeration holes are located below the filter layer, effectively covering the filter layer below, and realizing reliable high-pressure impact of dirt.

[0028] The on-off solenoid valve 29 of the turbidity meter I and the on-off solenoid valve 30 of the turbidity meter II are respectively connected to the control component. The above structure realizes the on-off of each turbidity meter and the filter system housing.

[0029] The connecting pipe Ⅰ4 between the blower 3 and the filter system housing 1 is provided with a solenoid valve Ⅰ15, which is connected to the control component 13. The above structure can adjust the on-off and air volume of the air blown by the blower by controlling the solenoid valve Ⅰ15 through the control component.

[0030] The connecting pipe II6 between the reverse water pump 8 and the filter system housing 1 is provided with a solenoid valve II16, which is connected to the control component 13. The above structure can adjust the on-off of the reverse water pump and the water volume and pressure by controlling the solenoid valve II16 through the control component.

[0031] As attached Figure 3 As shown, it is another embodiment. The cleaning device for the sewage treatment filtration system also includes a cleaning and recovery cylinder 20, an external thread portion is arranged on the upper part of the filtration system housing 1, and the cleaning and recovery cylinder 20 includes a cylinder body 21, and the cylinder body 21 is arranged in an arc-shaped structure. A bell-shaped connecting inlet 22 is arranged at one end of the cylinder body 21, and an internal thread portion is arranged on the inner surface of the lower end of the connecting inlet 22, and a receiving cylinder 23 is arranged at the other end of the cylinder body 21. The above structure is to avoid the upward dirt from the filter layer being washed away and entering the sewage source, and to recover it. According to the trajectory of the dirt moving upward after being impacted, a cleaning and recovery cylinder is arranged on the upper part of the filtration system, so that the dirt moves upward at a higher speed under the combined action of high-pressure water and high-pressure wind, and then enters the connecting inlet. The bell-shaped connecting inlet is convenient for the dirt to enter without forming an obstacle, and then the dirt passes through the cylinder body of the pipeline structure and then falls into the receiving cylinder. The receiving cylinder is connected to the main body by threaded screwing, which is convenient for disassembling and pouring out the collected dirt. In this way, dirt will not enter the sewage source, and dirt will not be pumped into the filter system housing again, and then adhere to the filter layer again, effectively reducing the frequency of filter layer blockage. After each cleaning, the filter layer can be used for a longer time, reducing the labor intensity of cleaning.

[0032] The impurity filter layer 2 comprises a first filter layer 24, a second filter layer 25, a third filter layer 26, and a fourth filter layer 27. The first filter layer 24, the second filter layer 25, the third filter layer 26, and the fourth filter layer 27 are arranged from top to bottom according to the gap. The filter holes of each filter layer 24, the second filter layer 25, the third filter layer 26, and the fourth filter layer 27 are reduced in sequence from top to bottom. In the above structure, the filter holes of each filter layer are different in size, and the dirt of different particle sizes are filtered. During cleaning, the dirt washed on each filter layer is washed and moved to the top of the filter layer by the filter holes of the filter layer above the filter layer, so that the dirt of each layer can be washed and moved to the top of the filter layer for easy recovery. The filter holes on each filter layer are all set to a trumpet-shaped structure with an eight-shaped cross section, so that the dirt adhering to the lower filter layer can be impacted and then pass through the upper filter layer upward, thereby improving the cleaning efficiency.

[0033] The present invention also relates to a method for cleaning a filter system for sewage treatment, and the cleaning steps of the method for cleaning a filter system for sewage treatment are as follows: 1) the water quality of the water after being filtered by the filter system housing 1 is monitored in real time by the water inlet turbidity meter II 12. When the actual value of the filtered water measured by the water inlet turbidity meter II 12 exceeds the standard value stored in the control component 13, the control component 13 alarms, and the control component 13 controls the sewage inlet pipeline solenoid valve 19 on the sewage inlet pipeline 17 to close, and stops inputting sewage into the filter system housing 1; 2) the control component 13 controls the blower 3 to open, and the gas is released through the aeration pipe 5, so that the adhered dirt falls off and is scattered from the impurity filter layer 2; 3) after the blower 3 works for 15min-20min, the control component 13 will control the backwash water pump 8 to start again, and the backwash water pump 8 pumps the clean water storage tank 7 into the filter system housing 1, and then washes the impurity filter layer 2 from the bottom of the impurity filter layer 2 upward, so that the adhered dirt is separated from the impurity filter layer 2 under the high-pressure water washing and enters the cleaning recovery cylinder 20. The above method can effectively clean the filter layer without disassembly, and has high efficiency and cleanliness.

[0034] The cleaning device for the sewage treatment filter system of the present invention starts the cleaning device for the sewage treatment filter system when the impurity filter layer in the filter system housing is clogged due to dirt adhesion. The cleaning device for the sewage treatment filter system first controls the blower to start, and the wind generated by the blower enters the filter system housing and is ejected from the aeration holes of the aeration pipe located below the impurity filter layer, applying high-pressure impact gas below the impurity filter layer. The high-pressure impact gas causes the dirt adhered to the impurity filter layer to fall off. For example, the colloids and flocculants attached to the filter layer fall off, and at the same time, the high-pressure gas causes the compacted dirt to become loose, and the flocculants or colloids rub and collide with each other, and the large particles or clumping blockages are broken up and decomposed, and the blockages and loose dirt are broken up and decomposed. After the blower has been working for a period of time, the cleaning device for the sewage treatment filter system will control the backwater pump to start again. The backwater pump pumps the clean water in the clean water storage tank storing the filtered clean water to impact the impurity filter layer in a high-pressure manner, and the decomposed blockages and loose dirt are impacted by high-pressure water, leaving the impurity filter layer (filter layer), and are impacted to leave the filter layer, and then various dirt returns to the sewage water source for precipitation, which is convenient for later cleaning. In this way, the cleaning effect of the filter layer is effectively improved. And clean water will not be wasted, saving water resources. The cleaning device for the sewage treatment filter system described in the present invention has a simple structure. When the sewage treatment filter system is blocked and affects the filtration efficiency and filtration quality, the filter system can be combined with backwashing, thereby effectively improving the backwashing efficiency, reducing the backwashing cost, and returning the backwashed sewage to the sewage water source. There is no secondary pollution problem, saving costs.

[0035] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A cleaning device for a sewage treatment filter system, the sewage treatment filter system comprising a filter system housing (1), an impurity filter layer (2) being arranged in the filter system housing (1), characterized in that: The cleaning device for the sewage treatment filtration system comprises a blower (3) and an aeration pipe (5); the blower (3) is connected to one end of a connecting pipe I (4); the other end of the connecting pipe I (4) extends into a filtration system housing (1); the other end of the connecting pipe I (4) is connected to the aeration pipe (5) located below the impurity filtration layer (2); the portion of the filtration system housing (1) located below the multi-media impurity filtration layer (2) is connected to a clean water storage tank (7) via a connecting pipe II (6); a backwash water pump (8) is provided on the connecting pipe II (6); The cleaning device for the sewage treatment filtration system further comprises a cleaning recovery cylinder (20), an external threaded portion is arranged on the upper portion of the filtration system housing (1), the cleaning recovery cylinder (20) comprises a cylinder body (21), the cylinder body (21) is arranged to have an arc-shaped structure, a bell-shaped connecting inlet (22) is arranged at one end of the cylinder body (21), an internal threaded portion is arranged on the inner surface of the lower end portion of the connecting inlet (22), and a receiving cylinder (23) is arranged at the other end of the cylinder body (21); The impurity filtering layer (2) comprises a first filter layer (24), a second filter layer (25), a third filter layer (26), and a fourth filter layer (27); the first filter layer (24), the second filter layer (25), the third filter layer (26), and the fourth filter layer (27) are arranged with gaps from top to bottom; and the filter pores of each filter layer of the first filter layer (24), the second filter layer (25), the third filter layer (26), and the fourth filter layer (27) decrease in order from top to bottom; The blower (3), backwash water pump (8), inlet turbidity meter I (10), and inlet turbidity meter II (12) are respectively connected to the control component (13); The portion of the filter system housing (1) located above the impurity filter layer (2) is connected to one end of a sewage inlet pipe (17), the other end of the sewage inlet pipe (17) is connected to a sewage source (18), a sewage inlet pipe solenoid valve (19) is provided on the sewage inlet pipe (17), and the sewage inlet pipe solenoid valve (19) is connected to the control component (13); A water quality monitoring pipeline I (9) is provided at a portion of the filter system housing (1) located above the impurity filter layer (2), and an inlet turbidity meter I (10) is installed on the water quality monitoring pipeline I (9). A water quality monitoring pipeline II (11) is provided at a portion of the filter system housing (1) located below the impurity filter layer (2), and an inlet turbidity meter II (12) is installed on the water quality monitoring pipeline II (11).

2. The cleaning device for a sewage treatment filtration system according to claim 1, characterized in that: The aeration pipe (5) is configured as a circular pipe structure, each end of the aeration pipe (5) is a closed structure, and a plurality of explosion holes (14) are provided on the aeration pipe (5) at intervals.

3. The cleaning device for a sewage treatment filtration system according to claim 1 or 2, characterized in that: A solenoid valve I (15) is installed at the position of the connecting pipeline I (4) between the blower (3) and the filter system housing (1), and the solenoid valve I (15) is connected to the control component (13).

4. The cleaning device for a sewage treatment filtration system according to claim 1 or 2, characterized in that: A solenoid valve II (16) is provided on the connecting pipeline II (6) between the reverse water pump (8) and the filter system housing (1), and the solenoid valve II (16) is connected to the control component (13).

5. A cleaning method using the cleaning device for a sewage treatment filtration system according to any one of claims 1 to 4, characterized in that: The cleaning method comprises the following steps: 1) the water inlet turbidity meter II (12) monitors the quality of the water after filtering by the filter system housing (1) in real time; when the actual value of the filtered water measured by the water inlet turbidity meter II (12) exceeds the standard value stored in the control component (13), the control component (13) gives an alarm, and the control component (13) controls the sewage inlet pipeline solenoid valve (19) on the sewage inlet pipeline (17) to close, thereby stopping the input of sewage into the filter system housing (1); 2) the control component (13) controls the blower (3) When the air is opened, the gas is released through the aeration pipe (5), causing the adhered dirt to fall off and be scattered from the impurity filter layer (2); 3) after the blower (3) has been working for 15-20 minutes, the control component (13) will control the backwash water pump (8) to start, and the backwash water pump (8) will pump the clean water from the storage tank (7) into the filter system housing (1), and then flush the impurity filter layer (2) from the bottom upward, so that the adhered dirt will be separated from the impurity filter layer (2) under the high-pressure water flushing and enter the cleaning recovery cylinder (20).

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