A construction site slurry wastewater treatment device and a method of using the same

Abstract

The application discloses a kind of construction site slurry wastewater treatment device and its using method, including sedimentation tank, centrifuge and filter tank, the output of the sedimentation tank is communicated with the filter tank feed end by the centrifuge, the top of the sedimentation tank is equipped with first water inlet, the top of the sedimentation tank one side is equipped with first water outlet, and the side far from the first water outlet is communicated with the sewage channel below, and the sewage channel is communicated with the inside of the sedimentation tank below and is equipped with sewage conveyor belt;The inside of the filter tank is divided into filter cavity and disinfection cavity by partition, and the inside of the filter cavity is equipped with filter structure.The application can realize continuous sewage treatment, shorten sewage treatment period, greatly improve the processing efficiency, save the labor of manual cleaning of staff;And the impurities in wastewater can be effectively cleaned, wastewater is completely treated, and the treatment effect is good.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a device for treating mud wastewater from construction sites and its method of use. Background Technology

[0002] Engineering mud is a type of mud mainly composed of clay, bentonite, and water. During engineering construction, it forms a semi-fluid mud cake, which can effectively prevent the collapse of the trench walls. If waste mud is not properly treated, it will cause problems after construction.

[0003] For example, a construction wastewater treatment device, patent number "CN213295068U", includes a wastewater treatment tank and an inlet hopper fixedly connected to the wastewater treatment tank. The inlet hopper is located at one end along the length of the wastewater treatment tank, and a filter screen is fixedly connected inside the inlet hopper. Adsorption blocks for adsorbing metal particles in the wastewater are provided on the inner wall of the wastewater treatment tank, and these adsorption blocks are located at the end of the wastewater treatment tank near the inlet hopper. This device improves the filtration effect of construction site wastewater and reduces the deposition of silt and sand in sewage pipes.

[0004] However, existing technologies are not comprehensive in treating mud wastewater and cannot remove as many impurities as possible. In addition, mud wastewater treatment usually involves a sedimentation step. Mud wastewater typically contains a lot of clay, bentonite, and sand, resulting in a lot of particulate matter after sedimentation. In order to store more wastewater, staff need to pause sedimentation and clean the sedimentation tank after a period of time, which not only increases the wastewater treatment cycle but is also inconvenient and time-consuming to operate. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a construction site mud wastewater treatment device and its usage method, so as to at least solve the problems mentioned in the background art.

[0006] The objective of this invention is achieved through the following technical solution: A construction site mud wastewater treatment device includes a sedimentation tank, a centrifuge, and a filter tank. The output end of the sedimentation tank is connected to the inlet end of the filter tank via the centrifuge. The sedimentation tank has a first inlet at the top and a first outlet on one side. A sewage discharge channel is connected to the lower part of the side away from the first outlet. The sewage discharge channel is connected to the lower part of the sedimentation tank and is equipped with a sewage conveyor belt. The filter tank is divided into a filtration chamber and a disinfection chamber by a partition. The filtration chamber has a filtration structure. A second inlet is connected to the side wall of the filter tank below the filtration structure. The output end of the centrifuge is connected to the second inlet via a pump. A second outlet is located on the upper part of the side wall of the filter tank away from the filtration chamber in the disinfection chamber.

[0007] Furthermore, the sewage conveyor belt is assembled and connected to the sewage channel and the inner wall of the sedimentation tank on both sides. Several push plates are provided at equal intervals on the sewage conveyor belt, and the push plates are tangential to the bottom of the sedimentation tank and the inner wall of the sewage channel.

[0008] Furthermore, multiple guide plates are provided above the sewage conveyor belt, and the guide plates are fixed to the inner wall of the sedimentation tank and are inclined downward relative to the center of the sedimentation tank.

[0009] Furthermore, both the guide plate and the sewage conveyor belt are provided with leakage holes.

[0010] Furthermore, a baffle is provided below the first outlet, and the baffle is fixedly connected to the inner wall of the sedimentation tank.

[0011] Furthermore, the filtration structure includes multiple layers of filter plates arranged sequentially from bottom to top in the filtration chamber, and a number of guide plates arranged at intervals along the water flow direction in the disinfection chamber.

[0012] Furthermore, the spacing between adjacent filter plates may be the same or different, and the pore size of each filter plate increases sequentially from top to bottom; the guide plates are arranged in an alternating pattern on the inner wall of the filter tank, and waterproof disinfection lamps are provided between adjacent guide plates; an activated carbon filter layer is provided inside the filter tank near the second outlet.

[0013] Furthermore, a backwashing mechanism is provided directly above the filter structure; the backwashing mechanism includes a top plate, a spray pipe and a nozzle, the top plate is disposed on the inner wall of the filter tank above the filter cavity, the spray pipe is spirally disposed below the top plate in a planar spiral structure, and multiple nozzles are provided and connected to the spray pipe, one end of the spray pipe is connected to an external water source, and a drain pipe is connected to the side wall of the filter tank below each layer of filter plate.

[0014] Furthermore, a uniform drug dispersing mechanism is provided at the top of the filtration tank; the uniform drug dispersing mechanism includes a feeding trough, which extends directly above the disinfection chamber. A scraper is slidably provided inside the feeding trough, and the side of the scraper near the end face of the feeding trough is connected to the feeding trough by a cylinder. A feeding port is provided at the top of the feeding trough, and multiple discharge holes communicating with the feeding trough are provided at equal intervals at the bottom.

[0015] A method for using a construction site mud wastewater treatment device, which utilizes the aforementioned construction site mud wastewater treatment device, includes the following steps: S1. Slowly introduce wastewater into the sedimentation tank at the end furthest from the first outlet until the wastewater level is level with the first outlet. S2. Let it stand for a period of time to allow impurities to settle and the upper layer to gradually become clear. At this time, continue to slowly introduce wastewater into the sedimentation tank. The flow rate of the introduced wastewater will not impact the sedimentation state of impurities near the first outlet. After adding wastewater, the liquid in the sedimentation tank increases, and the clear liquid on the upper layer is discharged from the first outlet and flows into the centrifuge. S3. By slowly driving the sewage conveyor belt, the push plate rotates slowly clockwise. The rotation speed of the sewage conveyor belt is so slow that it will not have a significant impact on the sedimentation of particulate dirt in the sedimentation tank. The movement of the sewage conveyor belt pushes the sludge and impurities that have settled to the bottom of the sedimentation tank toward the sewage discharge channel until the impurities are discharged, thus achieving the automatic cleaning effect of the sedimentation tank. S4. Wastewater entering the centrifuge undergoes solid-liquid separation through the centrifuge's drive, discharging solid particles and introducing the liquid into the second inlet of the filter tank via a pump. S5. The pump body pushes the liquid from bottom to top through multiple filter plates and over the partition to enter the disinfection chamber. S6. Add flocculant to the feed trough, drive the cylinder to move the scraper, and evenly feed the powder into the disinfection chamber in the filter tank. The wastewater combines with the flocculant to coagulate impurities into lumps, which are then filtered through the activated carbon filter layer. With the help of a waterproof disinfection lamp, the water can be sterilized and disinfected to kill microorganisms and bacteria. The purified water is discharged from the second outlet.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention drives the sewage conveyor belt to rotate, which in turn drives the push plate to rotate slowly. The rotation speed of the sewage conveyor belt is so slow that it will not have a significant impact on the sedimentation of particulate dirt in the sedimentation tank. This allows the sedimented sludge to be continuously cleaned during the sedimentation process in the sedimentation tank, thereby ensuring continuous sewage treatment, shortening the sewage treatment cycle, greatly improving treatment efficiency, and saving the labor of manual cleaning by staff.

[0017] (2) The present invention can effectively clean up impurities in wastewater by layer-by-layer sedimentation, filtration and disinfection through sedimentation tank, centrifuge and filter tank, so that the wastewater is clean and thorough and the treatment effect is good.

[0018] (3) The present invention facilitates the filtration of sewage by setting up a multi-layer filter plate. Since the impurities pass through the filter plate from top to bottom, they will not directly and completely cover the filter plate when they pass through the filter plate. The impurities will continuously rotate under the action of gravity and water flow impact but will not pass through the filter plate. This prevents the water flow from rapidly decreasing due to impurities clogging the filter plate during the filtration process.

[0019] (4) In this invention, the wastewater filtered by the filter plate enters the disinfection space, and a flocculant is sprinkled into the disinfection space to coagulate the fine impurities in the water into blocks, which are then filtered through the activated carbon filter layer. During this process, the waterproof disinfection lamp can sterilize and disinfect the microorganisms and bacteria in the water to obtain relatively pure water after disinfection.

[0020] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will now be described in further detail with reference to the accompanying drawings, wherein: Figure 1 A perspective view of a construction site mud wastewater treatment device provided by the present invention; Figure 2 A schematic diagram of the internal structure of a sedimentation tank in a construction site mud wastewater treatment device provided by the present invention. Figure 3 A schematic diagram of the hollow shell structure of a sedimentation tank in a construction site mud wastewater treatment device provided by the present invention. Figure 4 A schematic diagram of a centrifuge for a construction site mud wastewater treatment device provided by the present invention; Figure 5 A schematic diagram of the internal structure of the filter tank in a construction site mud wastewater treatment device provided by the present invention. Figure 6 A schematic diagram of the assembly of the filter tank and activated carbon filter layer in a construction site mud wastewater treatment device provided by the present invention. Figure 7 A top view of the top plate of a construction site mud wastewater treatment device provided by the present invention; Figure 8 This is a schematic diagram of the internal structure of the feeding trough of a construction site mud wastewater treatment device provided by the present invention.

[0022] Legend: 11. Sedimentation tank; 21. Centrifuge; 31. Filter tank; 111. First outlet; 112. Sewage discharge channel; 1121. Sewage conveyor belt; 1122. Push plate; 113. First inlet; 114. Guide plate; 115. Leakage hole; 116. Baffle; 211. Feed inlet; 311. Second inlet; 312. Pump body; 313. Filter plate; 3141. Top plate; 3142. Spray pipe; 3143. Nozzle; 3144. Sewage pipe; 315. Guide plate; 316. Waterproof disinfection lamp; 317. Second outlet; 318. Activated carbon filter layer; 3191. Feed trough; 3192. Scraper; 3193. Cylinder; 3194. Discharge hole; 3110. Baffle. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1 Please see Figure 1-8 The first embodiment of the present invention provides a construction site mud wastewater treatment device, including a sedimentation tank 11, a centrifuge 21 and a filter tank 31. The output end of the sedimentation tank 11 is connected to the feed end of the filter tank 31 through the centrifuge 21. A first inlet 113 is provided at the top of the sedimentation tank 11. A first outlet 111 is provided above one side of the sedimentation tank 11. A sewage discharge channel 112 is provided below the side away from the first outlet 111. The sewage discharge channel 112 is connected to the lower part of the sedimentation tank 11 and is provided with a sewage discharge conveyor belt 1121. The filter tank 31 is divided into a filtration chamber and a disinfection chamber by a partition 3110. A filtration structure is provided inside the filtration chamber. A second inlet 311 is provided on the side wall of the filter tank 31 below the filtration structure. The output end of the centrifuge 21 is connected to the second inlet 311 through a pump body 312. A second outlet 317 is provided above the side wall of the filter tank 31 away from the filtration chamber in the disinfection chamber.

[0025] In this embodiment, the sewage conveyor belt 1121 is unchanged from existing conveyor belt structures, such as commercially available electric conveyor belts. The sewage conveyor belt 1121 is connected to the sewage channel 112 and the inner wall of the sedimentation tank 11 on both sides. Several push plates 1122 are evenly spaced on the sewage conveyor belt 1121, and the push plates 1122 are tangentially positioned to the bottom of the sedimentation tank 11 and the inner wall of the sewage channel 112. The sewage channel 112 is an arc-shaped groove extending upwards along the bottom of the sedimentation tank 11. By driving the sewage conveyor belt 1121 to rotate, the push plates 1122 rotate slowly, and the sediment on the bottom inner wall of the sedimentation tank 11 is discharged along the sewage channel 112. The rotation speed of the sewage conveyor belt 1121 is so slow that it does not significantly affect the sedimentation of particulate matter in the sedimentation tank 11.

[0026] In this embodiment, multiple guide plates 114 are also provided above the sewage conveyor belt 1121. The guide plates 114 are fixed to the inner wall of the sedimentation tank 11 and are inclined downward relative to the center of the sedimentation tank 11. Specifically, at least two guide plates 114 are symmetrically arranged, with the two guide plates 114 inclined downward relative to the center of the sedimentation tank 11, forming a V-shaped drainage structure with high ends and low middle. Both the guide plates 114 and the sewage conveyor belt 1121 are provided with leakage holes 115. Through the guide plates 114, the settled impurities fall downward through the leakage holes 115 or slide directly from the guide plates 114 into the sedimentation tank 11. However, if the sewage conveyor belt 1121 rotates and causes slight agitation of the water in the sedimentation tank 11, the impurities in the water are difficult to pass through the leakage holes 115 and the guide plates 114 and float upward, thereby ensuring the quality of the effluent from the first outlet 111 of the sedimentation tank 11.

[0027] In this embodiment, a baffle 116 is provided on the inner wall of the sedimentation tank 11 below the first outlet 111. The three sides of the baffle 116 are assembled and connected to the inner wall of the sedimentation tank 11. By setting the baffle 116, the possibility of impurities after sedimentation being discharged with the water flow during the drainage process can be effectively reduced.

[0028] In this embodiment, the centrifuge 21 is a spiral centrifuge. The centrifuge 21 is provided with a feed inlet 211 at the top and a first water outlet 111 connected to the feed inlet 211. The centrifuge 21 is provided with a solid discharge outlet and a liquid discharge outlet at the bottom of both ends, respectively. The liquid discharge outlet is connected to the second water inlet 311 through the pump body 312.

[0029] In this embodiment, the filtration structure includes multiple layers of filter plates 313 arranged from bottom to top within the filtration chamber, and a plurality of guide plates 315 arranged at intervals along the water flow direction within the disinfection chamber. The intervals between adjacent layers of filter plates 313 may be the same or different, and the pore size of each layer of filter plates 313 increases sequentially from top to bottom. The multiple layers of filter plates 313 facilitate the filtration of wastewater. Because the wastewater passes through the filter plates 313 from top to bottom, impurities do not directly and completely cover the filter plates 313 when they pass through them. The impurities will continuously rotate under the action of gravity and water flow impact, but will not pass through the filter plates 313. This prevents the water flow from rapidly decreasing due to impurities clogging the filter plates 313 during the filtration process. The guide plates 315 are arranged in an alternating pattern on the inner wall of the filter tank 31. A waterproof disinfection lamp 316 is installed at the bottom of the filter tank 31 between adjacent guide plates 315. A second outlet 317 is provided at one end of the filter tank 31. An activated carbon filter layer 318 is provided inside the filter tank 31 near the second outlet 317. The sewage filtered by the filter plates 313 enters the disinfection chamber. A flocculant is sprinkled into the disinfection chamber to coagulate the fine impurities in the water into clumps, which are then filtered by the activated carbon filter layer 318. During this process, the waterproof disinfection lamp 316 can sterilize and disinfect microorganisms and bacteria in the water. The purified water is discharged from the second outlet 317.

[0030] Example 2 Based on the first embodiment, the second embodiment of the present invention provides a construction site mud wastewater treatment device, which further includes a backwashing mechanism disposed within the filter chamber. The backwashing mechanism is located directly above the filter structure and includes a top plate 3141, a spray pipe 3142, and nozzles 3143. The top plate 3141 is disposed on the inner wall of the filter tank 31 above the filter chamber. The spray pipe 3142 is spirally arranged below the top plate 3141 in a planar spiral structure. Multiple nozzles 3143 are provided and connected to the spray pipe 3142. One end of the spray pipe 3142 is connected to an external water source. A drain pipe 3144 is connected to the side wall of the filter tank 31 below each filter plate 313. During the flushing operation, by connecting the spray pipe 3142 to the external water source, the filter plates 313 are continuously flushed downwards. The wastewater after cleaning is discharged through the drain pipe 3144.

[0031] Example 3 Based on the first embodiment, the second embodiment of the present invention provides a construction site mud wastewater treatment device, which also has a uniform dispersing mechanism at the top of the filter tank 31. The uniform dispersing mechanism includes a feeding trough 3191, one end of which is connected to a top plate 3141, and the other end extends directly above the disinfection chamber. A scraper 3192 is slidably installed inside the feeding trough 3191. There may be two scrapers 3192 symmetrically arranged inside the feeding trough 3191. The side of the scraper 3192 near the end face of the feeding trough 3191 is connected to the feeding trough 3191 by a cylinder 3193. A feeding port is provided at the top of the feeding trough 3191, and multiple discharge holes 3194 connected to the feeding trough 3191 are provided at equal intervals at the bottom. When feeding flocculant, the flocculant powder can be assembled in the feeding trough 3191, and then the cylinder 3193 can be driven to move the scraper 3192. The scraper 3192 pushes the powder to move in the feeding trough 3191, so that the powder falls evenly from the discharge holes 3194, and the flocculant can be evenly sprinkled in the disinfection chamber.

[0032] The method of using the above-mentioned construction site mud wastewater treatment device specifically includes the following steps: S1. Slowly introduce wastewater into the first inlet 113 at the end of the sedimentation tank 11 away from the first outlet 111 until the wastewater level is level with the first outlet 111. S2. Let it stand for a period of time to allow impurities to settle and the upper layer to gradually become clear. At this time, continue to slowly introduce wastewater into the sedimentation tank 11. The flow rate of the introduced wastewater will not impact the sedimentation state of impurities near the first outlet 111. After adding wastewater, the liquid in the sedimentation tank 11 increases, and the clear liquid on the upper layer is discharged from the first outlet 111 and flows into the centrifuge 21. S3. By slowly driving the sewage conveyor belt 1121, the push plate 1122 is driven to rotate slowly clockwise. The rotation speed of the sewage conveyor belt 1121 is so slow that it will not have a significant impact on the sedimentation of particulate dirt in the sedimentation tank 11. The movement of the sewage conveyor belt 1121 pushes the sludge and impurities that have settled to the bottom of the sedimentation tank 11 toward the sewage discharge channel 112 until the impurities are discharged, thereby achieving the automatic cleaning effect of the sedimentation tank 11. S4. Wastewater entering the centrifuge 21 is separated into solid and liquid by the centrifuge 21, the solid particles are discharged, and the liquid is introduced into the second inlet 311 of the filter tank 31 through the pump body 312. S5, the pump body 312 pushes the liquid from bottom to top through multiple filter plates 313, and flips over the partition 3110 to enter the disinfection chamber; S6. Add flocculant to the feed trough 3191, drive cylinder 3193 to move scraper 3192, and evenly feed the powder into the disinfection chamber in filter tank 31. The wastewater combines with the flocculant to coagulate impurities into lumps, which are then filtered through activated carbon filter layer 318. With the help of waterproof disinfection lamp 316, the water can be sterilized and disinfected for microorganisms and bacteria. The purified water is discharged from the second outlet 317.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical solution of the present invention and based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A construction site mud wastewater treatment device, comprising a sedimentation tank (11), a centrifuge (21), and a filter tank (31), wherein the output end of the sedimentation tank (11) is connected to the feed end of the filter tank (31) through the centrifuge (21), characterized in that, The sedimentation tank (11) has a first inlet (113) at the top and a first outlet (111) on one side above it. A sewage discharge channel (112) is connected to the lower side away from the first outlet (111). The sewage discharge channel (112) is connected to the lower interior of the sedimentation tank (11) and is equipped with a sewage discharge conveyor belt (1121). The sewage discharge conveyor belt (1121) is assembled and connected to the sewage discharge channel (112) and the inner wall of the sedimentation tank (11) on both sides. Several push plates (1122) are evenly spaced on the sewage discharge conveyor belt (1121), and the push plates (1122) are tangential to the bottom of the sedimentation tank (11) and the inner wall of the sewage discharge channel (112). A baffle (116) is also provided below the first outlet (111), and the baffle (116) is fixed to the inner wall of the sedimentation tank (11). The filter tank (31) is divided into a filtration chamber and a disinfection chamber by a partition (3120). The filtration chamber is equipped with a filtration structure, and multiple layers of filter plates (313) are arranged from bottom to top in the filtration chamber. A second water inlet (311) is connected to the side wall of the filter tank (31) below the filtration structure. The output end of the centrifuge (21) is connected to the second water inlet (311) through a pump body (312). A second water outlet (317) is provided on the upper side wall of the filter tank (31) away from the filtration chamber in the disinfection chamber. Several guide plates (315) are arranged at intervals along the water flow direction in the disinfection chamber. The guide plates (315) are arranged in an alternating pattern on the inner wall of the filter tank (31), and a waterproof disinfection lamp (316) is provided between adjacent guide plates (315). A backwashing mechanism is also provided directly above the filter structure; the backwashing mechanism includes a top plate (3141), a spray pipe (3142) and a nozzle (3143). The top plate (3141) is located on the inner wall of the filter pool (31) above the filter chamber. The spray pipe (3142) is spirally arranged below the top plate (3141) in a planar spiral structure. Multiple nozzles (3143) are provided and connected to the spray pipe (3142). One end of the spray pipe (3142) is connected to an external water source. A drain pipe (3144) is connected to the side wall of the filter pool (31) below each layer of filter plate (313). A uniform dispersing mechanism is also provided at the top of the filter tank (31); the uniform dispersing mechanism includes a feeding trough (3191), which extends to the top of the disinfection chamber. A scraper (3192) is slidably provided inside the feeding trough (3191). The side of the scraper (3192) near the end face of the feeding trough (3191) is connected to the feeding trough (3191) by a cylinder (3193). A feeding port is provided at the top of the feeding trough (3191), and multiple discharge holes (3194) connected to the feeding trough (3191) are provided at equal intervals at the bottom.

2. The construction site mud wastewater treatment device according to claim 1, characterized in that, Above the sewage conveyor belt (1121) are also provided a plurality of guide plates (114), which are fixed to the inner wall of the sedimentation tank (11) and are inclined downward relative to the center of the sedimentation tank (11).

3. The construction site mud wastewater treatment device according to claim 2, characterized in that, Both the guide plate (114) and the sewage conveyor belt (1121) are provided with leakage holes (115).

4. The construction site mud wastewater treatment device according to claim 1, characterized in that, The spacing between two adjacent filter plates (313) may be the same or different, and the pore size of each filter plate (313) increases sequentially from top to bottom; an activated carbon filter layer (318) is provided inside the filter pool (31) near the second outlet (317).

5. A method of using a construction site mud wastewater treatment device, characterized in that, The construction site mud wastewater treatment device according to any one of claims 1-4 includes the following steps: S1. Slowly introduce wastewater into the sedimentation tank (11) at the end away from the first outlet (111) until the wastewater level is level with the first outlet (111); S2. Let it stand for a period of time to allow impurities to settle and the upper layer to gradually become clear. At this time, continue to slowly introduce wastewater into the sedimentation tank (11). The flow rate of the introduced wastewater will not impact the sedimentation state of impurities near the first outlet (111). After adding wastewater, the liquid in the sedimentation tank (11) increases, and the clear liquid in the upper layer is discharged from the first outlet (111) and flows into the centrifuge (21). S3. By slowly driving the sewage conveyor belt (1121), the push plate (1122) is driven to rotate slowly clockwise. The rotation speed of the sewage conveyor belt (1121) is so slow that it will not have a significant impact on the sedimentation of particulate dirt in the sedimentation tank (11). The movement of the sewage conveyor belt (1121) pushes the sludge and impurities that have settled to the bottom of the sedimentation tank (11) to the sewage channel (112) until the impurities are discharged, thus achieving the automatic cleaning effect of the sedimentation tank (11). S4. Wastewater entering the centrifuge (21) is separated into solid and liquid by the centrifuge (21), the solid particles are discharged, and the liquid is introduced into the second inlet (311) of the filter tank (31) through the pump body (312). S5. The pump body (312) pushes the liquid from bottom to top through multiple filter plates (313) and over the partition (3120) into the sterilization chamber. S6. Add flocculant to the feed trough (3191), drive cylinder (3193) to move scraper (3192) and evenly feed powder into the disinfection chamber in filter tank (31). Wastewater and flocculant combine to condense impurities into blocks, which are then filtered through activated carbon filter layer (318). Waterproof disinfection lamp (316) is used to sterilize and disinfect microorganisms and bacteria in the water. The pure water is discharged from the second outlet (317).

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