989 results about "Rinse water" patented technology

The invention discloses a floating type riverway water quality detector for municipal environment monitoring, and belongs to the technical field of water quality detectors, the floating type riverway water quality detector comprises a floating body floating in a riverway, the lower end of the floating body is fixedly provided with a fixing cylinder for sampling, the inner side of the floating body is fixedly provided with a partition plate, and the partition plate is provided with a detection module; a drainage pipe is rotationally connected to the center of the rotating seat, a sample tank for collecting samples and a water outlet pipe for discharging washing water are mounted on the partition plate, a water inlet groove is formed in the lower end of the fixing cylinder, a purification assembly is mounted on the inner side of the water inlet groove, and meanwhile an elastic rubber sheet is mounted at the upper end of the water inlet groove. The floating type river water quality detector for municipal environment monitoring can conveniently collect and store a water sample in the detection process, and can flush a pipeline by using a purified water body after single detection, so that the subsequent detection precision is ensured.

The invention relates to the technical field of control, in particular to a method and device for calculating the water saving amount of a demister of a wet desulfurization system, electronic equipment and a storage medium, the method is applied to a control unit in the wet desulfurization system, and a spraying area, a water collecting area and a demisting area are sequentially arranged in a desulfurization tower of the wet desulfurization system in the flue gas flowing direction. And at least one demister is arranged in the demisting area. According to the method for calculating the water-saving amount of the demister of the wet desulphurization system, the average water-saving amount is calculated by dynamically calculating the number of iterations and the single-time water-saving amount of cyclic utilization of flushing water in combination with the structural characteristics of a spraying area, a water collecting area and a demisting area in a desulphurization tower and the operation logic of a cyclic flushing water system, and the water-saving amount of the demister of the wet desulphurization system is calculated. Accurate quantification of the water saving amount and system optimization control are achieved, the water saving effect is quantified, data support is provided for system design, and meanwhile the water balance reliability of the desulfurization system is improved.

Provided herein are methods and compositions for carbonation of recycled concrete aggregates (RCA) to produce carbonated RCA. In addition, uses of the carbonated RCA, such as in building materials, and building materials containing RCA, are included. Carbonation of RCA may be used alone or may be used in combination with other carbonation processes associated with concrete manufacture, such as carbonation of wet concrete mixes and / or carbonation of concrete wash water.

The invention discloses a closestool flushing device and a flushing method thereof, the closestool flushing device comprises a closestool body, a water tank, a water suction pump, a water distribution pipe and a circuit board, and the closestool body is provided with an upper flushing port and a lower flushing port. The water distribution pipe comprises a water inlet, a first water outlet and a second water outlet, the water inlet is communicated with an outlet of the water suction pump, the first water outlet is communicated with the upper flushing port, the second water outlet is communicated with the lower flushing port, an inlet of the water suction pump is communicated with the water tank, and the minimum through-flow sectional area of the upper flushing waterway is smaller than that of the lower flushing waterway. The closestool flushing device has a brush ring flushing state and a main flushing state, and in the brush ring flushing state, the circuit board controls the power of the water suction pump to be a first preset value so as to control the flow of the upper flushing opening to be larger than that of the lower flushing opening; in the main flushing state, the circuit board controls the power of the water suction pump to be a second preset value so as to control the flow of the lower flushing opening to be larger than the flow of the upper flushing opening, and the second preset value is larger than the first preset value.

The invention provides a ship kitchen wet garbage treatment system and method. The ship kitchen wet garbage treatment system comprises a kitchen wet garbage crusher, a vacuum collection device and a storage cabinet. The kitchen wet garbage crusher, the vacuum collecting device and the storage cabinet are sequentially connected through a pipeline; the storage cabinet is connected with a plurality of discharging pipelines, each discharging pipeline is provided with a remote control gate valve, and the discharging pipelines are used for discharging crushed wet garbage to at least one of outboard facilities, shore facilities and other equipment on a ship; smashed kitchen wet garbage is stored on the storage cabinet through vacuum suction of the vacuum collecting device, so that generation of flushing water is greatly reduced, and loads of the sewage treatment device and the degreaser are reduced; and the storage cabinet is connected with a plurality of discharging pipelines, and each discharging pipeline is provided with a remote control gate valve, so that sailors can flexibly discharge the crushed wet garbage according to different sea area discharging regulations.

The application discloses a kind of plane target material cleaning car, it is related to cleaning car technical field, including cleaning pool, cleaning pool is equipped with cleaning mechanism, cleaning mechanism includes the multiple rotatable cleaning rollers of double number and parallel juxtaposition, wherein, multiple cleaning rollers are divided into the same number of two groups from middle position, the rotating direction of two groups of cleaning rollers in each group is same, and the rotating direction of group outside is opposite;When using, plane target material is placed in the middle on the two groups of cleaning rollers on the cleaning mechanism, then plane target material is washed, water flows along target material and stays on cleaning roller, and the rotating state of two groups of cleaning rollers is opposite, therefore, the position of plane target material can be kept stable, and in the process of cleaning roller rotation, frictional force is generated on the bottom of plane target material by cleaning roller, so cleaning roller can clean the bottom of target material with water flow, so as to realize the purpose that target material can be cleaned completely without turning over.

The utility model discloses a direct impact type hydraulic rock drill which comprises a machine body composed of a machine tail portion, a cylinder body portion, a gear box portion and a machine head portion, the machine tail portion and the cylinder body portion jointly form an impact assembly, and the gear box portion comprises a rotation assembly. A first cavity for accommodating an impact piston is formed in the impact assembly; the rotary assembly and the machine head part jointly form a second cavity for accommodating the bit shank, and the first cavity is communicated with the second cavity; the impact piston is provided with a center hole. The bit shank is provided with a flushing cavity. One end of the water needle is fixed to the machine tail part, a pipe body of the water needle penetrates through a center hole of the impact piston, extends into the bit shank and is communicated with the flushing cavity, a water inlet cavity isolated from the first cavity is formed in the machine tail part, and the water inlet cavity is communicated with the water needle; and a water inlet communicated with the water inlet cavity is formed in the machine tail part and used for introducing flushing water into the water inlet cavity and the water needle so as to cool the impact piston and the bit shank and flush the bit shank.

The invention discloses an offshore short-process water treatment and water injection process package based on an efficient coalescence produced water oil removal technology. The short-flow water treatment and water injection process package is structurally characterized in that an inlet of a production water basket filter is connected with a water outlet of an upstream production separator, an outlet of the production water basket filter is connected with an inlet of a production water efficient coalescence separator, and a water outlet of the production water basket filter is connected with an inlet of a water injection filter and an inlet of a water injection buffer tank; the water outlet is connected to a water injection manifold through a water injection booster pump front filter, a water injection booster pump and a water injection pump in sequence; and the other water outlet of the water injection buffer tank is respectively connected to backwashing water inlets of the production water efficient coalescence separator and the water injection filter through a backwashing water pump front filter and a backwashing water pump in sequence. Production water can be treated into qualified injection water through a short process, oil and suspended solids in water of an offshore platform are efficiently removed, and the device has the advantages of being small in occupied area and light in weight and is suitable for being applied to the sea.

To provide a washing water tank device capable of being downsized while accurately distributing washing water in a washing water tank.SOLUTION: A washing water tank device (4) of the invention comprises: an outer tank (12); an inner tank (14) disposed in the outer tank; a feed water valve (16); a first drain valve (8) to open and close a first drain port (12a); a second drain valve (10) to switch between discharge and stop of washing water from a second drain port (12b); and a water pressure drive mechanism (18) to open the first drain valve or the second drain valve by feed water pressure of the washing water fed through the feed water valve. A water feed port to feed the washing water to the feed water vale, the first drain port, and the second drain port provided on a bottom of the outer tank are disposed in a width direction of a flush toilet bowl body and are not overlapped with each other on a projection surface in a front-back direction of the flush toilet bowl body.SELECTED DRAWING: Figure 2

The invention provides a power plant sludge pump process control optimization method, and belongs to the technical field of power plant automation control. The sludge pump can at least partially solve the problems that the displacement cannot be accurately matched, the pipeline is easy to block, and the pump body is burnt out due to the fact that the control of the existing sludge pump depends on easily blocked pressure measuring points and unreliable manual flushing. The method comprises the following steps: acquiring a real-time liquid level of a clarification tank, and automatically starting sequence control when the liquid level reaches a high threshold value; in sequence control, effective flushing is ensured by monitoring the flow of flushing water; during the sludge pumping and discharging period, continuously monitoring the outlet flow of the sludge pump; and when the outlet flow is lower than an operation failure threshold value or the liquid level of the clarification tank is lower than a low threshold value, the pump stopping step is automatically executed. The automatic control system has the beneficial effects that closed-loop automatic control is realized by introducing the liquid level meter and the outlet flow meter, and a pressure measuring point which is easy to block is replaced by outlet flow monitoring, so that the problem that the pump body is burnt due to idling is fundamentally avoided.

The present invention applies to the technical field of pet caring equipment, and in particular relates to an intelligent water dispenser for a pet, including a control device, a water purifying tank, a wastewater tank, a drinking water basin, a water purifying conduit, a wastewater conduit, a water purifying flow driving device, and a wastewater flow driving device. The drinking water basin is provided with a drinking water outlet, a rinse water outlet, and a wastewater collecting port. The purified water in the water purifying tank flows to the drinking water outlet and the rinse water outlet via the water purifying conduit. The solution has the function of discharging accumulated water of the drinking water basin and rinsing the bottom of the drinking water basin at the same time, thus ensuring that the drinking water basin is clean, and improving the cleanliness of the drinking water of a pet.

The present invention provides a flush toilet apparatus (1) including a flush toilet main body (2) including a bowl (2a) and a discharge trap conduit (2b), a flush water tank main body (4), a rim discharge valve (8) that controls spouting and stop of flush water from a rim spout port (2c), a jet discharge valve (10) that controls spouting and stop of flush water from a jet spout port (2d), a rim conduit (2e) that guides flush water drained via the rim discharge valve to the rim spout port, and a jet conduit (2f) that guides flush water drained via the jet discharge valve to the jet spout port, and a cross-sectional area of the rim spout port is smaller than a cross-sectional area of the jet spout port.

The invention provides methods and compositions for treating wash water from concrete production with carbon dioxide. The treated wash water can be reused as mix water in fresh batches of concrete.

The utility model relates to the field of magnetic pumps, and provides a full-heat-preservation magnetic pump structure. Comprising a shell, an impeller installed in the shell, a rotating shaft, an input shaft and a magnetic assembly, the shell comprises a pump shell, a pump cover and an end cover, a heat exchange cavity is formed in the pump cover, the shaft end, close to the input shaft, of the rotating shaft is sleeved with an isolation sleeve, the isolation sleeve is located between a magnetic outer sleeve and a magnetic inner sleeve, and the end, close to the input shaft, of the isolation sleeve is closed; the other end of the isolation sleeve is in sealing fit with the inner wall of a heat exchange cavity in the pump cover, and the outer side wall of the isolation sleeve is in sealing fit with an isolation ring in the heat exchange cavity. The heat exchange cavity is machined in the pump shell, heat preservation of the pump body is achieved through circulating hot water introduced into the heat exchange cavity, especially heat preservation of the bearing portion, and the influence of crystallization of a conveyed medium on operation of the pump is avoided. By means of the design of the double isolation sleeves, conveyed media can be effectively prevented from entering the input section of the pump body through the inner isolation sleeve, and the input end of the pump body is prevented from being affected by washing water and heat exchange media through the outer isolation sleeve.

The invention discloses a compact water purifier and a machine body mounting frame thereof, and belongs to the field of water purifiers. A filter element mounting part extending transversely is arranged on a machine body mounting frame, a first mounting area is formed in the filter element mounting part, a second mounting area is formed at the top of the first mounting area, a booster pump and an adapter are mounted in the second mounting area, and the extension width of the second mounting area covers and exceeds the radial width of the filter element mounting part; the filter element mounting part is arranged close to one side of the mounting area II in the width direction, a mounting area III is formed below the area, exceeding the filter element mounting part, of the mounting area II, and a flushing water tank is mounted in the mounting area III. The water purification function is independently set, the internal space layout is optimized, the size of the whole machine is simplified, an external water port can be formed, the water purifier can be effectively connected with an external water use function module, the water purifier can be suitable for different installation scenes, and different use requirements of users are met.

The utility model provides a three-way structure and fabric treatment equipment, and belongs to the technical field of fabric treatment equipment. According to the three-way structure, through the design of the three-way cavity, the water inlet, the water outlet and the backwashing water opening are integrated in one structure, so that water flow can be reasonably distributed in the three-way cavity. Meanwhile, due to the arrangement of the filter screen, the cleaning effect of the water flow is improved, the utilization efficiency of the water flow is further improved through the backwashing function, and water flow waste is avoided.

The utility model discloses a coke oven flue gas desulfurization device, which relates to the technical field of coke oven flue gas desulfurization and comprises a desulfurization kettle, the desulfurization kettle is fixedly connected with an exhaust pipe and a liquid conveying pipe, and the bottom of the desulfurization kettle is fixedly connected with a blow-off pipe. The device further comprises a pre-cleaning mechanism used for removing dust particles in flue gas and a flue gas washing assembly used for increasing the contact area of the flue gas and alkali liquor. When the device is used, flue gas needing to be conveyed to the gas conveying pipe, the stirring device fully stirs and mixes the flue gas and water, solid particles in the flue gas are removed through the water, the solid particles can be gathered in the middle of the bottom of the stirring barrel under the action of rotating water flow, precipitates are formed after the solid particles are accumulated to a certain degree, and the solid particles are separated from the stirring barrel. And by inputting high-pressure water flow into the flushing water pipe, precipitated particles can be flushed away, so that the pollution discharge effect is realized, solid particles in the flue gas are cleaned, and the influence of the solid particles in the flue gas on subsequent operation is reduced.

The invention provides clothes treatment equipment and a rinsing control method thereof, and belongs to the technical field of clothes treatment equipment. According to the method, the water absorption rate of the clothes put into the washing barrel can be calculated based on the first weight of the load of the washing barrel after the clothes are detected to be put into the washing barrel but before the water is fed for washing and the second weight of the load of the washing barrel after the first dehydration after the washing is finished; therefore, the rinsing water amount can be automatically adjusted according to the first weight (namely the dry clothes weight) loaded by the washing barrel and / or the water absorption rate of the clothes, the rinsing effect of the clothes can be improved, and the user experience is improved.

The invention discloses a flushing mechanism of birch juice bag breaking and collecting equipment. According to the technical scheme, the device comprises a flushing machine frame, a flushing water tank arranged outside the flushing machine frame, a flushing water pump and a flushing spray head assembly arranged in the flushing machine frame, and two chain conveying lines for hanging collecting bags and conveying the collecting bags are arranged in the flushing machine frame; the water pump pumps water in the flushing water tank to the flushing spray head assembly, the flushing spray head assembly comprises a plurality of M-shaped water spraying pipes which are communicated, each M-shaped water spraying pipe is fixedly provided with a plurality of spray heads which can spray and wash the exterior of the collecting bag, and the water after flushing falls into a storage water tank at the bottom of the flushing rack. And a filter screen is arranged above the storage water tank. According to the scheme provided by the invention, the collecting bag filled with birch juice can be cleaned thoroughly, efficiently and continuously.

The utility model relates to the technical field of boiler sewage waste heat recovery, and discloses a boiler sewage waste heat flash recovery device which comprises a flash tank, a water inlet pipe arranged at the input end of the flash tank, a pressure gauge arranged at the top of the water inlet pipe, a steam outlet and a connecting pipe arranged at the top of the flash tank. The connecting pipe is arranged at the top of the flash tank, and the mixing box and the water pump are arranged at the input end of the connecting pipe, so that when the water pump is connected with an external water pipe, the water pump injects water into the flash tank from the connecting pipe after passing through the mixing box, the interior of the flash tank is flushed, and then flushing water can be discharged from the water outlet in the bottom; and meanwhile, cleaning liquid can be added into the mixing box to be matched with flushing water for cleaning, the effect that the flash tank is conveniently mixed with the cleaning liquid to be cleaned is achieved, manpower is saved, and operation is easy and convenient.

The application relates to the technical field of aquaculture machinery, in particular to a breeding special water pollution reduction water-saving type micro-filter capable of controlling backwashing flow by changing pressure, which comprises a rack, a filtering rotary drum, a driving motor, a backwashing water pump, a backwashing nozzle, a differential pressure sensor and a programmable controller, the filtering rotary drum is installed on the rack and is used for solid-liquid separation of water, the driving motor is in transmission cooperation with the filtering rotary drum to drive the filtering rotary drum to rotate, the differential pressure sensor is used for detecting the pressure difference between the water inlet side and the water outlet side of the filtering rotary drum and outputting a detection signal, and the backwashing water pump is in pipeline communication with the backwashing nozzle. In the breeding special water pollution reduction water-saving type micro-filter capable of controlling backwashing flow by changing pressure, the backwashing pressure and flow can be dynamically adjusted according to the filter screen blocking rate, the light blocking and the heavy blocking are distinguished to match corresponding washing intensity, and the problems of excessive washing, water resource and electric energy waste of traditional equipment are completely solved.

The utility model relates to the technical field of saline-alkali soil remediation, and discloses a saline-alkali soil environment and ecological remediation system which comprises a salt discharging pipe, a salt discharging ditch, a water treatment chamber, a first lifting conveying assembly, a water collecting tank, a first treatment box, activated carbon, a second treatment box, a flat plate ceramic membrane filtering assembly and a second lifting conveying assembly. Through the arrangement of the structure, the effects of collecting and desalting leaching water discharged after salt leaching are realized, and the desalted leaching water forms fresh water, so that the fresh water can be recycled, and the problem of shortage of fresh water resources is favorably relieved.

The invention provides an air knife drainage system and tableware cleaning equipment, and belongs to the technical field of tableware cleaning, and the air knife drainage system comprises an air knife assembly used for supplying air upwards to form an air knife; and the water tank is connected to the air knife assembly and used for collecting cleaning water entering the air knife assembly, and a drainage mechanism capable of being opened and closed is arranged at the bottom of the water tank. The water tank is arranged to be connected with the air knife assembly, after the rinsing water enters the air knife assembly, the rinsing water can be discharged into the water tank to be collected, the situation that the rinsing water is accumulated in the air knife assembly and influences air conveying is avoided, and therefore the influence that the rinsing water enters the air knife assembly can be avoided, the tableware drying effect can be guaranteed, and the drying efficiency is improved.

This invention belongs to the field of hot-dip galvanizing technology, specifically a rinsing water treatment device for hot-dip galvanizing workshops. It includes an evaporation tank for evaporating rinsing water, with a hydrocyclone separator for separating heavy metal salts installed on one side of the evaporation tank. The bottom of the evaporation tank is connected to the input end of the hydrocyclone separator. The interior of the evaporation tank contains multiple evaporation tubes that can be raised and lowered. This design replaces the original massive amount of rinsing water with a recyclable weak acid solution, not only improving the rinsing effect and ensuring the cleanliness of the raw materials after rinsing, but also reducing rinsing time and increasing production efficiency. Furthermore, the recyclability of the rinsing water significantly reduces the workload of rinsing wastewater treatment and transforms previously difficult-to-treat wastewater sediments into high-value industrial raw materials that can be recycled, thus alleviating the burden of rinsing water treatment.

The utility model relates to a kind of reverse osmosis thick water emission reduction and reuse system, belong to water treatment technical field.The system includes the thick water reverse osmosis booster pump, ultra-low pressure thick water reverse osmosis device connected in turn, reuse water tank, wherein, reverse osmosis thick water is treated by preposed reverse osmosis device, and after being added hydrochloric acid and scale inhibitor by hydrochloric acid dosing device, scale inhibitor dosing device to reverse osmosis thick water, it is entered ultra-low pressure thick water reverse osmosis device by thick water reverse osmosis booster pump after treatment;The thick water generated after ultra-low pressure thick water reverse osmosis device treatment is directly discharged, and water production enters reuse water tank, part is reused, another part is washed to ultra-low pressure thick water reverse osmosis device by flushing water pump;While ultra-low pressure thick water reverse osmosis device is connected chemical cleaning device.The utility model has the advantages of flexible system operation mode, simple operation, high degree of automation, efficient energy saving, low operating cost, stable and reliable etc..

The utility model discloses a conveyor belt cleaning device which comprises a water bucket, one side of the water bucket is fixedly connected with a protective cover, one side of the water bucket is fixedly connected with a rolling brush motor, the output end of the rolling brush motor is fixedly connected with a rolling brush through a coupler, the top of the water bucket is provided with a flexible scraping plate, and the flexible scraping plate is fixedly connected with the rolling brush motor. Scraper swing arm pressing devices are arranged at the two ends of the flexible scraper, a clean water inlet is formed in one side of the water bucket, a circulating water device is arranged on one side of the water bucket, and the circulating water device comprises a circulating water opening, a water inlet pump pipe, a circulating water pump, a water pump water outlet pipe, a water outlet pipe and a flushing water pipe. A liquid level control device is arranged on one side of the water bucket, through the arrangement of the circulating water device, the rolling brush and the multiple flexible scraping plates, cleaning of the conveying belt is facilitated, meanwhile, waste of water resources is reduced, meanwhile, through the arrangement of the liquid level control device, the water capacity in the water bucket can be controlled, and supplementing and discharging of cleaning water are facilitated.

The utility model provides a novel liquid drainage device for a liquid separation tank, which belongs to the field of production of acetylene from natural gas and related chemical industry, and comprises a liquid separation tank, a tank bottom valve, a flushing water valve and an in-situ water pipe network, a through hole is formed in the center of the bottom of the liquid separation tank, and the tank bottom valve is mounted in the through hole and hermetically connected with the through hole; the drainage pipeline connected with the lower end of the tank bottom valve is connected with an in-situ water pipe network through a flushing pipeline; and a flushing water valve is arranged on the flushing pipeline. According to the device, the tank bottom valve is arranged at the bottom of the liquid separation tank, meanwhile, the flushing pipeline is additionally arranged to flush the liquid drainage pipeline, the flushing water valve is closed in the liquid drainage process, and the tank bottom valve is opened for liquid drainage; and after liquid drainage is completed, the tank bottom valve is closed, and the flushing water valve is opened, so that the polymer remained in the liquid drainage pipeline is flushed, continuous flushing of the liquid drainage pipeline is realized, blockage of the liquid drainage pipeline is avoided, and the operation cycle of the device is prolonged.

The present application relates to the technical field of clothing processing, and provides a clothing processing device and a control method thereof. The clothing processing device includes a clothes drum, an electrolyte release device, a cleaning material generating device, and a washing aid device. The clothes drum has a clothing processing chamber; the electrolyte release device is used to release electrolytes; the cleaning material generating device is used to generate cleaning materials; and the washing aid device is used to release washing aid materials. The electrolyte release device, the cleaning material generating device, and the clothing processing chamber are connected in sequence to form a first liquid path. The electrolyte release device, the cleaning material generating device, the washing aid device, and the clothing processing chamber are connected in sequence to form a second liquid path. Different substances can be delivered into the clothing processing chamber through two different liquid paths to clean clothes. Similar or even better cleaning effects can be achieved without the use of strong cleaning agents such as detergents and washing powders, and the number of rinsing times or the amount of rinsing water can be reduced, thereby reducing costs and shortening washing time.

The invention discloses a method for efficiently recycling ammonium sulfate in electrolytic manganese residues. The method comprises the following steps that firstly, 0.5-1.5 parts of the electrolytic manganese residues and 2-4 parts of clear water are taken and put into a stirring machine to be fully and evenly stirred; 2, adding an acidic reagent into the slurry obtained in the step 1 after fully and uniformly stirring, adjusting the pH value, and then continuously stirring to obtain slurry; 3, the slurry obtained in the step 2 is pumped into a filter press for solid-liquid separation, filtrate and filter residues are obtained, and the filtrate is collected for standby application; 4, the filtrate in the step 3 is returned to the step 1 to replace 2-4 parts of clear water, and then 0.5-1.5 parts of electrolytic manganese residues are taken and put into a stirrer to be fully and evenly stirred; 5, repeating the step 2 and the step 3 on the slurry in the step 4 to obtain filtrate for later use; the invention aims to solve the problems that the electrolytic manganese residue recovery device in the prior art needs to be washed for multiple times, the water consumption is large, other impurities are always remained in water after washing, and the subsequent treatment difficulty is increased.

The utility model provides a backwashing drainage structure of a filter, and relates to the technical field of filters. Comprising a filter body, a blow-off pipe, a flow dividing pipe and a mounting cylinder, a supporting frame is arranged on the inner wall of the blow-off pipe, a bearing is arranged at the top end of the supporting frame, fan blades are arranged in the bearing in a penetrating mode, a mounting frame is arranged on the outer side of the mounting cylinder, a brush is arranged on the outer side of the mounting frame, and the brush makes contact with the inner wall of the blow-off pipe. According to the utility model, the fan blades, the brush and other components are arranged, so that water flow discharged by flushing water can push the fan blades in the blow-off pipe to rotate during backwashing drainage of the filter body, and the rotation of the fan blades can drive the brush to rotate in the blow-off pipe; the brush can be used for rotatably cleaning the inner wall of the blow-off pipe during the backwashing drainage period of the filter body, so that the residual quantity of impurities on the inner side of the blow-off pipe is reduced, and the influence on the blow-off efficiency of the filter body due to blockage or narrowing of the blow-off opening is reduced.