Sewage treatment device with filtering function

Abstract

The invention discloses a sewage treatment device with a filtering function, the sewage treatment device comprises a sewage tank and a clear water tank, a PH adjusting tank, a first particle filter, a membrane biofilter, a second particle filter and a membrane separation unit are sequentially connected between the sewage tank and the clear water tank, a water outlet of the sewage tank is connected to the PH adjusting tank through a pipeline, and a water outlet of the sewage tank is connected to the membrane separation unit through a pipeline. A water outlet of the PH adjusting tank is connected to the first particle filter through a pipeline, a water outlet of the first particle filter is connected to a water inlet of the membrane biofilter through a pipeline, and a water outlet of the membrane biofilter is connected to the second particle filter. A water outlet of the second particle filter is connected with a membrane separation unit; a water disinfection device is arranged between the membrane separation unit and the clear water tank; according to the sewage treatment device, sewage can be further treated, the sewage treatment standard can be greatly improved through the structure, and safe and healthy drinking water can be obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, and in particular to a sewage treatment device with a filtering function. Background Art

[0002] Rural domestic sewage refers to the sewage generated by rural residents' lives, mainly including low-concentration domestic sewage generated by rural residents' washing, cleaning, and bathing, and high-concentration domestic sewage generated by rural residents' flushing of feces. The former is also called gray water, and the latter is also called black water. Rural domestic sewage contains a large amount of pollutants such as ammonia nitrogen, total nitrogen, total phosphorus, and animal and vegetable oils. As many as 63.06% of rural areas in my country have not treated domestic sewage. The discharge of rural domestic sewage has become a serious problem that needs to be solved urgently.

[0003] The treatment methods of rural domestic sewage mainly include centralized and decentralized treatment. Among them, centralized treatment is suitable for rural areas with large populations, densely populated areas and simple terrains, and the technology is relatively mature at present. Decentralized treatment is suitable for rural areas with sparse populations, scattered populations and complex terrains, and there is a lack of relatively mature technology at present.

[0004] Patent No. CN202410233337.0 discloses a decentralized rural domestic sewage resource utilization system based on membrane separation technology, including a sewage treatment unit, an agricultural irrigation unit and a real-time monitoring unit. The sewage treatment unit includes a system water inlet tank, an activated carbon filter, a multi-media filter, a softener, a pressure pump, an ultrafiltration membrane assembly, a high-pressure pump, a reverse osmosis membrane assembly, a system water outlet tank, an ultraviolet light lamp and connecting pipes. Although the above technical scheme can treat sewage and convert it into agricultural irrigation water, the above equipment has the following disadvantages when the sewage treatment equipment is in use: the treated sewage can only be used for agricultural irrigation, and the sewage is discharged after being treated into a unified non-drinking standard. The treatment standard for sewage is low, and the above sewage treatment equipment cannot be cleaned during use, resulting in a large amount of impurities in the sewage treatment device that clog the pipe, affecting the further use of the sewage treatment device.

[0005] In order to solve the above technical problems, a sewage treatment device with filtering function is urgently needed to be disclosed. Summary of the invention

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a sewage treatment device with a filtering function, comprising a sewage tank and a clean water tank, wherein a pH regulating tank, a first particle filter, a membrane biofilter, a second particle filter and a membrane separation unit are sequentially connected between the sewage tank and the clean water tank, the water outlet of the sewage tank is connected to the pH regulating tank through a pipeline, the water outlet of the pH regulating tank is connected to the first particle filter through a pipeline, the water outlet of the first particle filter is connected to the water inlet of the membrane biofilter through a pipeline, the water outlet of the membrane biofilter is connected to the second particle filter, the water outlet of the second particle filter is connected to the membrane separation unit, and a water disinfection device is arranged between the membrane separation unit and the clean water tank;

[0007] The membrane biofilter is connected to a cleaning medicine box, a metering pump is installed on the top of the cleaning medicine box, and the medicine in the cleaning medicine box is quantitatively delivered to the membrane biofilter through the metering pump. The first particle filter and the second particle filter are connected to a backwashing component;

[0008] The sewage tank is connected to a cleaning water tank via a connecting water pump, and an upper water outlet of the cleaning water tank is connected to the membrane biofilter via a pipeline.

[0009] Furthermore, the first particle filter and the second particle filter are both security filters, a first one-way control valve is installed on the outlet pipe of the first particle filter, and a second one-way control valve 5-1 is installed on the outlet pipe of the second particle filter, so as to intercept impurities in the water, including but not limited to suspended matter, colloids, microorganisms, and algae in the fluid.

[0010] Furthermore, a pH meter is provided inside the pH regulating tank, and a water outlet of the pH regulating tank is connected to a lifting pump, and the lifting pump is connected to the water inlet of the first particle filter through a water pipe. The water outlet of the first particle filter sends water to the membrane biological filter through the water pump, and the water outlet of the membrane biological filter is connected to a delivery water pump, and the water outlet of the delivery water pump is connected to the second particle filter through a pipeline, and the sewage treated by the membrane biological filter is sent to the second particle filter through the delivery water pump.

[0011] The advantages of the invention compared with the prior art are:

[0012] The present invention adopts multiple structures such as a pH adjustment tank, a first particle filter, a membrane biofilter, a second particle filter and a membrane separation unit to treat sewage. The pH value of the sewage is adjusted by the pH adjustment tank, and large particle impurities in the sewage are filtered by the first particle filter and the second particle filter to remove impurities such as suspended matter, colloids, microorganisms, algae, etc. in the sewage. The membrane biofilter can efficiently achieve solid-liquid separation, wherein the membrane separation unit can further treat the sewage. The above structure can greatly improve the treatment standard of sewage and obtain safe and healthy drinking water.

[0013] The present invention uses structures such as a cleaning medicine box, a metering pump and a cleaning water tank to clean the membrane biofilter, thereby avoiding pipe blockage during sewage treatment, thereby ensuring that the sewage treatment device can be used more efficiently and reducing the maintenance cost of the sewage treatment device.

[0014] The membrane separation unit of the present invention comprises an external shell, a first filter element, a second water quality filter element and a plurality of filter membranes arranged in a stacked manner. The above structure can further treat sewage, wherein the first filter element can remove rust, red worms, floating matter and particulate matter in the water, the second water quality filter element can remove foreign color and odor, some organic and inorganic impurities, and residual chlorine in the water, and the filter membrane can remove impurities with a diameter exceeding 0.45-0.48 μm in the water, thereby solving the problem of low water treatment standards in the prior art. The above structure can retain minerals and trace elements beneficial to the human body during the water treatment process, and obtain safe and healthy drinking water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a sewage treatment device with filtering function according to the present invention;

[0016] Figure 2 A top view of a sewage treatment device with filtering function according to the present invention;

[0017] Figure 3 Schematic diagram of the three-dimensional structure of the membrane separation unit Figure 1 ;

[0018] Figure 4 Schematic diagram of the three-dimensional structure of the membrane separation unit Figure 2 ;

[0019] Figure 5 Schematic diagram of the internal structure of the membrane separation unit;

[0020] Figure 6 for Figure 5 A partial enlarged view of point A in the middle.

[0021] Among them, 1. sewage tank, 2. clean water tank, 3. first particle filter, 3-1. first one-way control valve, 4. membrane biofilter, 5. second particle filter, 5-1. first one-way control valve, 6. membrane separation unit, 6-1. external shell, 6-2. first filter element, 6-3. second water filter element, 6-4. filter membrane, 7. cleaning medicine box, 8. metering pump, 9. cleaning water tank, 10. lifting pump, 11. water delivery pump, 12. water inlet, 13. water outlet, 14. PLC control cabinet, 15. sewage inlet, 16. ultraviolet disinfector, 17. circulating water pump, 18. installation tank. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0023] The present invention is described in detail with reference to the accompanying drawings.

[0024] The present invention provides a sewage treatment device with a filtering function in a specific implementation, including a sewage tank 1 and a clean water tank 2, wherein a pH regulating tank, a first particle filter 3, a membrane biological filter 4, a second particle filter 5 and a membrane separation unit 6 are connected in sequence between the sewage tank 1 and the clean water tank 2, the water outlet of the sewage tank 1 is connected to the pH regulating tank through a pipeline, the water outlet of the pH regulating tank is connected to the first particle filter 3 through a pipeline, the water outlet of the first particle filter 3 is connected to the water inlet of the membrane biological filter 4 through a pipeline, the water outlet of the membrane biological filter 4 is connected to the second particle filter 5, the water outlet of the second particle filter 5 is connected to the membrane separation unit 6, and a water disinfection device is arranged between the membrane separation unit 6 and the clean water tank 2; wherein the water disinfection device is an ultraviolet disinfector 16, the sewage treated by the membrane separation unit can be irradiated by an ultraviolet lamp to remove bacteria and microorganisms in the water, and the water disinfected by ultraviolet rays enters the clean water tank 2, and the above structure has a higher standard for water treatment than that in the prior art, so that the treated water can meet the reference requirements.

[0025] The first particle filter 3 and the second particle filter 5 are connected to a cleaning medicine box 7, and a metering pump 8 is installed on the top of the cleaning medicine box 7. The medicine in the cleaning medicine box 7 is quantitatively delivered to the first particle filter 3 and the second particle filter 5 through the metering pump 8. The first particle filter 3 and the second particle filter 5 are connected to a backwashing component;

[0026] The sewage tank 1 is connected to a cleaning water tank 9 via a water pump, and a water outlet on the cleaning water tank 9 is connected to the membrane biofilter 4 via a pipeline.

[0027] Embodiment 1:

[0028] In this embodiment, the security filter model used for the first particle filter 3 and the second particle filter 5 is CBF-M2-304-F50P1.0.

[0029] The model of the membrane biofilter 4 is BW56-DW-28. The membrane biofilter of the above model can withstand high temperature sterilization.

[0030] The water delivery pump 11 can be made of IHF fluoroplastic corrosion-resistant centrifugal pump.

[0031] The metering pump 8 adopts a TCK series metering pump.

[0032] By using this embodiment, domestic sewage is treated and the sewage treatment device is cleaned to prevent impurities from clogging the sewage treatment device and affecting the normal use of the sewage treatment device.

[0033] When treating sewage, the sewage inlet at the top of the sewage tank 1 can be connected to domestic sewage through a pipe, and the domestic sewage enters the interior of the sewage tank 1, and the sewage inside the sewage tank 1 enters the PH adjusting tank. The staff adjusts the PH value of the sewage inside the PH adjusting tank according to the treatment requirements. If it needs to be used as drinking water, the staff can control the PH value inside the sewage adjusting tank between 7.0 and 8.0, so that the pH value of the water can be neutral or weakly alkaline.

[0034] The sewage in the PH adjustment tank enters the first particle filter 3 after the PH value is adjusted. The first particle filter 3 can remove impurities such as suspended matter, colloids, microorganisms, algae, etc. in the sewage, and the first particle filter 3 can achieve pre-filtration of the sewage.

[0035] The sewage treated by the first particle filter 3 enters the membrane biofilter 4, the model of which is BW56-DW-28. The membrane biofilter 4 adsorbs pollutants in the sewage through a filter medium containing microorganisms. The microorganisms decompose the pollutants into harmless substances such as carbon dioxide, water and organic acids by secreting enzymes and other catalysts.

[0036] After being treated by the membrane biofilter 4, the sewage enters the second particle filter 5, which can further treat the water and further intercept suspended matter, colloids, microorganisms, and algae in the sewage. For impurities that are not completely filtered out by the first particle filter 3, the second particle filter 5 and the first particle filter 3 can achieve double interception of impurities in the water, making the removal of suspended matter, colloids, microorganisms, algae and other impurities in the sewage more thorough.

[0037] The sewage treated by the second particle filter 5 enters the membrane separation unit 6, and is further treated by the membrane separation unit 6. Healthy and safe drinking water can be obtained through the membrane separation unit 6.

[0038] The specific use process of the cleaning medicine box 7 is as follows: when the sewage treatment device needs to be cleaned, start the metering pump 8 at the top of the cleaning medicine box 7. The metering pump 8 is controlled by the PLC, and the cleaning medicine in the cleaning medicine box 7 can be quantitatively delivered to the corresponding first particle filter 3 and the second particle filter 5 connected to the cleaning medicine box 7. The first particle filter 3 and the second particle filter 5 are connected to the circulating water pump 17, and the circulating water pump 17 is used to provide backwashing water to the first particle filter 3 and the second particle filter 5, and the cleaned water is delivered to the inside of the waterless tank 1. The structure of the cleaning medicine box and the metering pump can quantitatively control the input medicine to ensure the cleaning effect.

[0039] Since the sewage tank 1 is connected to the cleaning water tank 9 through the lifting pump 10, the water outlet on the cleaning water tank 9 is connected to the membrane biofilter 4 through a pipeline. The first one-way control valve and the second one-way control valve can be closed before cleaning. The cleaned water can enter the interior of the sewage tank 1 from the cleaning water tank 9 to realize circulating filtration treatment. The above structure can further improve the utilization rate of sewage and avoid water waste.

[0040] This embodiment can be used to clean the sewage treatment device. At the same time, the sewage treated in the first embodiment can be used for irrigation, and can effectively reduce the concentration of particulate matter in the fluid, which helps to maintain the stability of water quality.

[0041] The membrane bioreactor 4 may be an MBR with a backwashing structure. In order to ensure the biological activity inside the membrane bioreactor 4, an aerator for supplying oxygen is connected to the membrane bioreactor 4. The above structure is common knowledge and the applicant will not elaborate on it.

[0042] In order to facilitate the filtration of suspended matter, colloids, microorganisms and algae in the water, the first particle filter 3 and the second particle filter 5 both use security filters, and the security filter model used for the first particle filter 3 and the second particle filter 5 is CBF-M2-304-F50P1.0. A first one-way control valve 3-1 is installed on the outlet pipe of the first particle filter 3, and a second one-way control valve 5-1 is installed on the outlet pipe of the second particle filter 5. It is used to intercept impurities in the water, including but not limited to suspended matter, colloids, microorganisms and algae in the fluid. The above security filter has a simple structure and is easy to replace the filter element.

[0043] In order to facilitate visual observation of the pH value in the pH regulating tank and to facilitate sending the water in the pH regulating tank to the first particle filter, a pH meter is arranged inside the pH regulating tank, and a lift pump 10 is connected to the water outlet of the pH regulating tank, and the lift pump 10 is connected to the water inlet of the first particle filter 3 through a water pipe. The water outlet of the first particle filter 3 sends water to the membrane biological filter 4 through a water pump, and the water outlet of the membrane biological filter 4 is connected to a delivery water pump 11, and the water outlet of the delivery water pump 11 is connected to the second particle filter 5 through a pipeline, and the sewage treated by the membrane biological filter 4 is sent to the second particle filter 5 through the delivery water pump 11. The structural setting of the delivery water pump 11 facilitates sending the sewage treated by the membrane biological filter 4 to the second particle filter 5.

[0044] Embodiment 2:

[0045] The membrane separation unit 6 includes an external housing 6-1, a first filter cartridge 6-2, a second water filter cartridge 6-3 and a plurality of superimposed filter membranes 6-4. The first filter cartridge 6-2, the second water filter cartridge 6-3 and a plurality of superimposed filter membranes 6-4 are detachably installed in the membrane separation unit 6. In order to facilitate the installation of the filter membrane and the filter cartridge inside the membrane separation unit, a plurality of installation slots 18 are arranged inside the external housing 6-1. The structural arrangement of the installation slots facilitates the replacement of the filter membrane and the filter cartridge. The installation slots 18 adopt an inwardly concave rectangular slot structure. A silicone sealing component is installed at the connection between the first filter cartridge 6-2, the second water filter cartridge 6-3 and the filter membrane 6-4 to increase the tightness of the connection between the rectangular slot and the filter cartridge and the filter membrane.

[0046] The outer shell 6-1 is provided with a water inlet 12 and a water outlet 13, the water inlet 12 is connected to the water pump 11 through a pipeline, the first filter element 6-2 is arranged near the water inlet 12, the second water quality filter element 6-3 is arranged between the first filter element 6-2 and the filter membrane 6-4, the filter membrane 6-4 is arranged near the water outlet 13, and the water outlet on the outer shell 6-1 delivers the filtered water into the clean water tank 2 through a water pump.

[0047] Among them, the filter diameter of the first filter element 6-2 is a 4-5μm activated carbon filter element, which is used to remove foreign colors and odors, some organic and inorganic impurities, and residual chlorine in the water. Specifically, it removes the following substances in the water by physical adsorption, among which some organic substances include pesticides, herbicides, fungicides and other industrial organic chemicals in the water, as well as dissolved organic matter (DOM), adsorbing and removing residual chlorine in the water and toxic byproducts formed by the reaction of chlorine with organic matter, such as chloroform and other halogenated hydrocarbons. Activated carbon can effectively remove unpleasant tastes and odors in water, such as earthy, musty and chemical odors.

[0048] Among them, the filter diameter of the second water quality filter element 6-3 is 0.48-0.5μmCF all-diatom microporous ceramic filter element, which is used to remove rust, red worms, floating matter and particulate matter in the water.

[0049] The filter membrane 6-4 has a filter diameter of 0.45-0.48 μm. The filter membrane is made of nylon to achieve the filtering effect.

[0050] By treating sewage in this embodiment, the water quality can meet the corresponding quotation requirements. First, the sewage inside the sewage tank 1 enters the PH adjustment tank. The staff adjusts the PH value of the sewage inside the PH adjustment tank according to the treatment requirements. If it needs to be used as drinking water, the staff can control the PH value inside the sewage adjustment tank between 7.0 and 8.0, so that the pH value of the water can be neutral or weakly alkaline.

[0051] After being treated by the membrane biofilter 4, the sewage enters the second particle filter 5. The second particle filter 5 can further treat the water and further intercept the suspended matter, colloids, microorganisms and algae in the sewage. The second particle filter 5 and the first particle filter 3 can achieve double interception of impurities in the water, making the removal of suspended matter, colloids, microorganisms, algae and other impurities in the sewage more thorough.

[0052] The sewage treated by the second particle filter 5 enters the membrane separation unit 6, and is further treated by the membrane separation unit 6. Healthy and safe drinking water can be obtained through the membrane separation unit 6.

[0053] The water treated by the second particle filter 5 enters the membrane separation unit from the water inlet 12 on the outer shell 6-1. The water passes through the first filter element 6-2 to remove foreign colors and odors, some organic and inorganic impurities, and residual chlorine in the water. The second water filter element 6-3 removes rust, red worms, floating matter and particulate matter in the water. The filter membrane 6-4 removes impurities with a diameter greater than 0.45 μm.

[0054] Two groups of membrane separation units 6 are provided. When the two groups of membrane separation units 6 start working at the same time, the efficiency of sewage treatment can be improved. A parallel connection structure is adopted between the two groups of membrane separation units 6. When one group of membrane separation units 6 is damaged, the other group of membrane separation units 6 can continue to work normally, thereby reducing the use cost of the sewage treatment device.

[0055] In order to facilitate the control of the metering pump, the metering pump 8 at the top of the cleaning medicine box 7 is electrically connected to the PLC control cabinet 14 through a cable, and the control of the metering pump 8 is achieved through the PLC control cabinet 14.

[0056] In order to facilitate the collection of sewage, the backwash component is a circulating water pump 17, and two groups of circulating water pumps 17 are provided. The water inlet of the circulating water pump 17 is used to connect to the cleaning water tank 9, and the water outlets of the first particle filter 3 and the second particle filter 5 are used to connect to the circulating pump. The water outlets of the two groups of circulating water pumps 17 are used to connect to the sewage tank 1. The cleaning water in the cleaning water tank 9 is circulated to the inside of the first particle filter 3 through the circulating water pump 17, and the cleaning sewage in the first particle filter 3 is circulated to the sewage tank 9.

[0057] As a further elaboration of the present invention, the structural arrangement of the first one-way control valve and the second one-way control valve can effectively prevent the backflow of impurities.

[0058] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A sewage treatment device with filtering function, characterized in that: The invention comprises a sewage tank (1) and a clean water tank (2), wherein a pH regulating tank, a first particle filter (3), a membrane biofilter (4), a second particle filter (5) and a membrane separation unit (6) are sequentially connected between the sewage tank (1) and the clean water tank (2); the water outlet of the sewage tank (1) is connected to the pH regulating tank via a pipeline, the water outlet of the pH regulating tank is connected to the first particle filter (3) via a pipeline, the water outlet of the first particle filter (3) is connected to the water inlet of the membrane biofilter (4) via a pipeline, the water outlet of the membrane biofilter (4) is connected to the second particle filter (5), the water outlet of the second particle filter (5) is connected to the membrane separation unit (6), and a water disinfection device is arranged between the membrane separation unit (6) and the clean water tank (2); The first particle filter (3) and the second particle filter (5) are connected to a cleaning medicine box (7), a metering pump (8) is installed on the top of the cleaning medicine box (7), and the medicine in the cleaning medicine box (7) is quantitatively delivered to the first particle filter (3) and the second particle filter (5) through the metering pump (8), and the first particle filter (3) and the second particle filter (5) are connected to a backwashing component; The sewage tank (1) is connected to a cleaning water tank (9) via a water pump, and the water outlet of the cleaning water tank (9) is connected to the membrane biofilter (4) via a pipeline.

2. A sewage treatment device with filtering function according to claim 1, characterized in that: The first particle filter (3) and the second particle filter (5) are both security filters, and a first one-way control valve (3-1) is installed on the outlet pipe of the first particle filter (3), and a second one-way control valve (5-1) is installed on the outlet pipe of the second particle filter (5) to intercept impurities in the water, including but not limited to suspended matter, colloids, microorganisms, and algae in the fluid.

3. A sewage treatment device with filtering function according to claim 1, characterized in that: A pH meter is arranged inside the pH regulating tank. The water outlet of the pH regulating tank is connected to a lifting pump (10). The lifting pump (10) is connected to the water inlet of the first particle filter (3) through a water pipe. The water outlet of the first particle filter (3) sends water to the membrane biological filter (4) through a water pump. The water outlet of the membrane biological filter (4) is connected to a delivery water pump (11). The water outlet of the delivery water pump (11) is connected to the second particle filter (5) through a pipeline. The sewage treated by the membrane biological filter (4) is sent to the second particle filter (5) through the delivery water pump (11).

4. The sewage treatment device with filtering function according to claim 1, characterized in that: The membrane separation unit (6) comprises an external shell (6-1), a first filter element (6-2), a second water filter element (6-3) and a plurality of superimposed filter membranes (6-4); the first filter element (6-2), the second water filter element (6-3) and the plurality of superimposed filter membranes (6-4) are detachably installed in the membrane separation unit (6); a water inlet (12) and a water outlet (13) are provided on the external shell (6-1); the water inlet (12) is connected to a water delivery pump via a pipeline; the first filter element (6-2) is arranged near the water inlet (12); the second water filter element (6-3) is arranged between the first filter element (6-2) and the filter membrane (6-4); the filter membrane (6-4) is arranged near the water outlet (13); and the water outlet on the external shell (6-1) delivers filtered water into a clean water tank (2) via a water pump.

5. A sewage treatment device with filtering function according to claim 4, characterized in that: The first filter element (6-2) has a filter diameter of 4-5 μm activated carbon filter element, which is used to remove discoloration and odor, some organic and inorganic impurities, and residual chlorine in the water. The second water quality filter element (6-3) has a filter diameter of 0.48-0.5 μm CF all-diatom microporous ceramic filter element, which is used to remove rust, red worms, floating matter and particulate matter in the water.

6. A sewage treatment device with filtering function according to claim 4, characterized in that: The filter membrane (6-4) has a filter diameter of 0.45-0.48 μm.

7. The sewage treatment device with filtering function according to claim 1, characterized in that: The metering pump (8) at the top of the cleaning medicine box (7) is electrically connected to a PLC control cabinet (14) via a cable, and the metering pump (8) is controlled by the PLC control cabinet (14).

8. The sewage treatment device with filtering function according to claim 1, characterized in that: The water disinfection device is an ultraviolet disinfector (16).

9. The sewage treatment device with filtering function according to claim 1, characterized in that: The top of the sewage tank (1) is provided with a sewage inlet (15) for connecting to a sewage pipe.

10. The sewage treatment device with filtering function according to claim 1, characterized in that: The backwash component is a circulating water pump (17). Two groups of the circulating water pump (17) are provided. The water inlet of the circulating water pump (17) is used to connect to a cleaning water tank (9). The water outlets of the first particle filter (3) and the second particle filter (5) are used to connect to the circulating pump. The water outlets of the two groups of circulating water pumps (17) are used to connect to a sewage tank (1). The cleaning water in the cleaning water tank (9) is circulated to the inside of the first particle filter (3) through the circulating water pump (17), and the cleaning sewage in the first particle filter (3) is circulated to the sewage tank (9).

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