A device and method for treating high-salt, high-concentration organic wastewater

Abstract

This invention discloses a wastewater treatment technology field, specifically a device and method for treating high-salt, high-concentration organic wastewater. The device includes: a filter frame, a box structure with an internal rectangular chamber; a wastewater filtration assembly, including a drive assembly, a scooping assembly, and an auxiliary discharge assembly. The drive assembly is installed inside the filter frame, and its three movable parts are connected to three scooping assemblies. The auxiliary discharge assembly is installed on one side of the filter frame; a pulverizing assembly is installed on the outside of the filter frame, with its pulverizing part located inside the filter frame; and a wastewater pump connected to the outside of the filter frame. This high-salt, high-concentration organic wastewater treatment device and method not only enables automatic filtration via hydraulic power but also allows impurities on the filter to fall off during filtration, possessing a certain degree of self-cleaning function.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a device and method for treating high-salt, high-concentration organic wastewater. Background Technology

[0002] With my country's industrialization, various industrial enterprises generate large amounts of high-salt, high-concentration organic wastewater every year. High-salt organic wastewater typically contains large amounts of inorganic salts and organic matter, specifically organic matter content (CODcr > 10000 mg / L) and at least 3.5% dissolved solids. The salt content is expressed as sodium chloride concentration, with a salt mass fraction of at least 1%. High-salt organic wastewater is characterized by high salinity, high COD concentration, and complex composition. Furthermore, due to its high concentration of soluble inorganic salts and recalcitrant organic matter, direct discharge without treatment will severely impact soil and natural water bodies, causing irreversible harm to the natural environment and human health.

[0003] In existing wastewater treatment methods, it is often necessary to filter out impurities before electrochemical treatment of inorganic salts and organic matter. However, the treatment of wastewater impurities often consumes a lot of energy, and the filtration equipment is relatively fixed and does not have a self-cleaning function. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0006] A device for treating high-salt, high-concentration organic wastewater, comprising:

[0007] The filter frame is a box structure with a rectangular chamber inside;

[0008] A wastewater filtration assembly includes a drive assembly, a retrieval assembly, and an auxiliary discharge assembly. The drive assembly is installed inside the filter frame, and three movable parts of the drive assembly are connected to three retrieval assemblies. The auxiliary discharge assembly is installed on one side of the inside of the filter frame.

[0009] A pulverizing component is installed on the outer side of the filter frame, and the pulverizing part of the pulverizing component is located inside the filter frame;

[0010] A sewage pump connected to the outer side of a filter frame;

[0011] Wastewater treatment equipment, connected to a wastewater pump;

[0012] Waste processing equipment, connected to the other side of the filter frame.

[0013] As a preferred embodiment of the high-salt, high-concentration organic wastewater treatment device of the present invention, wherein: a feed inlet is provided at the top of the filter frame, a guide frame is installed at the top inside the filter frame, a sludge discharge trough is provided at the bottom of one side of the filter frame, an inclined first filter screen is provided inside the sludge discharge trough, an inclined surface opposite to the inclined direction of the first filter screen is provided at the bottom of the sludge discharge trough, a crushing part of a crushing component is provided inside the sludge discharge trough, and a return port is provided at the end of the inclined surface at the bottom of the sludge discharge trough.

[0014] In a preferred embodiment of the high-salt, high-concentration organic wastewater treatment device of the present invention, the driving assembly includes a first driving wheel, driving blades, a first transmission wheel, a first transmission belt, a second transmission wheel, a second driving wheel, rotating rods, and connecting shafts. The first driving wheel is movably connected to a connecting frame. Six driving blades are equidistantly and annularly mounted on the first driving wheel. A first transmission wheel is mounted at the center of the front wall of the first driving wheel. The first transmission wheel is connected to a second transmission wheel via a first transmission belt. The second transmission wheel is movably connected to the center of the connecting frame. A second driving wheel is mounted at the center of the rear wall of the second transmission wheel. Three rotating rods are equidistantly and annularly mounted on the second driving wheel. Three connecting shafts are vertically and forward-facing mounted at the ends of the three rotating rods. Three retrieval components are movably connected to the three connecting shafts respectively.

[0015] In a preferred embodiment of the high-salt, high-concentration organic wastewater treatment device of the present invention, the retrieval assembly includes a rotating sleeve, a second transmission belt, a third transmission wheel, a rotating wheel, a retrieval frame, and a second filter screen. The rotating sleeve is movably connected to the connecting shaft of the drive assembly. The front end of the side wall of the rotating sleeve is connected to the third transmission wheel via the second transmission belt. The rotating wheel is installed on the rear wall of the third transmission wheel. The rotating wheel rotates 360° when passing the auxiliary discharge assembly. The retrieval frame is installed at the bottom end of the side wall of the rotating sleeve. The second filter screen is installed in the through groove opened in the middle of the retrieval frame. The third transmission wheel is movably connected to the connecting shaft via a connecting frame.

[0016] As a preferred embodiment of the high-salt, high-concentration organic wastewater treatment device of the present invention, the auxiliary discharge assembly includes a plate, a friction layer, a clamping rod, a clamping spring, and a fixing rod. The friction layer is installed on the side wall of the plate near the retrieval assembly. The plate is matched with the rotating wheel. Clamping rods are installed at the four corners of the other side wall of the plate. The clamping rod is connected to a sliding groove opened inside the fixing rod through the clamping spring, and the clamping rod is movably connected in the sliding groove inside the fixing rod.

[0017] As a preferred embodiment of the high-salt, high-concentration organic wastewater treatment device of the present invention, the pulverizing component includes a rotary motor, a first bevel gear, a second bevel gear, a drive shaft, a pulverizing roller, a third bevel gear, a rotary joint, a fourth bevel gear, and a fifth bevel gear. The rotary motor is installed on the outer side wall of the filter frame. The first bevel gear is installed at the output end of the rotary motor. The first bevel gear is vertically and movably connected to the second bevel gear. The second bevel gear is vertically and movably connected to the third bevel gear. The third bevel gear is coaxially and in opposite directions connected to the fourth bevel gear through the rotary joint. The fourth bevel gear is vertically and movably connected to the fifth bevel gear. Drive shafts are vertically installed at the center of one side wall of the second bevel gear and the center of one side wall of the fifth bevel gear. The two drive shafts penetrate into the interior of the connecting frame and are movably connected to the inner wall of the sewage discharge tank. Two pulverizing rollers that cooperate with each other are installed on the two drive shafts.

[0018] A method for treating high-salt, high-concentration organic wastewater includes the following steps;

[0019] S1: Sewage is introduced into the filter frame. As the sewage falls, it drives the drive component to work. The drive component drives the retrieval component on its three connecting shafts to rotate, continuously retrieval the sewage and remove impurities from the sewage.

[0020] S2: After the retrieval component retrieves impurities from the sewage, it continues to rotate and moves to the vicinity of the auxiliary discharge component. The rotating wheel of the retrieval component is in contact with the plate of the auxiliary discharge component, and the rotating wheel rotates on the plate, thereby causing the retrieval frame to rotate and pour the retrieved impurities into the sewage trough.

[0021] S3: Impurities fall into the sewage discharge tank, are crushed by the crushing components in the sewage discharge tank, and fall onto the first filter screen after being crushed. The inclined first filter screen causes the impurities to roll into the waste treatment equipment, and the wastewater in the impurities flows back into the filter frame through the return port.

[0022] S4: Continuously remove impurities from the sewage until the impurities are almost completely removed. Then, use a sewage pump to discharge the filtered sewage into the sewage treatment equipment for further treatment.

[0023] Compared with existing technologies, this high-salt, high-concentration organic wastewater treatment device and method not only automatically filters the filtration equipment through hydraulic power, but also allows impurities on the filtration equipment to fall off during filtration, thus completing the filtration of wastewater and cleaning of the retrieval equipment itself. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0025] Figure 1 This is an internal view of the present invention;

[0026] Figure 2 This is a front view of the driving component of the present invention;

[0027] Figure 3 This is a front view of the salvage component of the present invention;

[0028] Figure 4 This is an isometric view of the salvage component of the present invention;

[0029] Figure 5 This is a cross-sectional view of the auxiliary material feeding component of the present invention;

[0030] Figure 6 This is a front view of the pulverizing component of the present invention.

[0031] In the diagram: 100 Filter frame, 110 Inlet, 120 Guide frame, 130 Sewage discharge trough, 140 First filter screen, 150 Return port, 200 Sewage filtration assembly, 210 Drive assembly, 211 First drive wheel, 212 Drive blade, 213 First transmission wheel, 214 First transmission belt, 215 Second transmission wheel, 216 Second drive wheel, 217 Rotating rod, 218 Connecting shaft, 220 Retrieval assembly, 221 Rotating sleeve, 222 Second transmission belt, 223 Third transmission wheel, 224 Rotating wheel, 22 5. Salvage frame, 226. Second filter screen, 227. Connecting frame, 230. Auxiliary discharge assembly, 231. Flat plate, 232. Friction layer, 233. Tightening rod, 234. Tightening spring, 235. Fixing rod, 300. Crushing assembly, 310. Rotary motor, 320. First bevel gear, 330. Second bevel gear, 340. Drive shaft, 350. Crushing roller, 360. Third bevel gear, 370. Rotating joint, 380. Fourth bevel gear, 390. Fifth bevel gear, 400. Sewage pump, 500. Sewage treatment equipment, 600. Waste treatment equipment. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include the three-dimensional spatial dimensions of length, width, and depth.

[0035] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0036] This invention provides a device and method for treating high-salt, high-concentration organic wastewater. It can not only automatically filter water by driving the filtration equipment with hydraulic power, but also remove impurities from the filtration equipment during the filtration process, thus having a certain self-cleaning function.

[0037] Figure 1 The diagram shown is a structural schematic of a first embodiment of a high-salt, high-concentration organic wastewater treatment device according to the present invention. Please refer to [link / reference]. Figures 1-3 The main body of the high-salt, high-concentration organic wastewater treatment device and method of this embodiment includes:

[0038] The filter frame 100 is a box structure with a rectangular chamber inside; the filter frame 100 is used to provide a place for filtration.

[0039] The wastewater filtration assembly 200 includes a drive assembly 210, a retrieval assembly 220, and an auxiliary discharge assembly 230. The drive assembly 210 is installed inside the filter frame 100, and three movable parts of the drive assembly 210 are connected to three retrieval assemblies 220. The auxiliary discharge assembly 230 is installed on one side of the inside of the filter frame 100. The drive assembly 210 is used to drive the retrieval assembly 220 to rotate by hydraulic power. The retrieval assembly 220 is used to retrieve impurities in the wastewater. The auxiliary discharge assembly 230 is used to drive the retrieval frame 225 on the retrieval assembly 220 to rotate when the retrieval assembly 220 passes by.

[0040] The pulverizing component 300 is installed on the outer side of the filter frame 100, and the pulverizing part of the pulverizing component 300 is located inside the filter frame 100; the pulverizing component 300 is used to pulverize the collected impurities.

[0041] Wastewater pump 400 is connected to the outside of filter frame 100; wastewater pump 400 is used to pump wastewater into wastewater treatment equipment 500;

[0042] Wastewater treatment equipment 500 is connected to wastewater pump 400; wastewater treatment equipment 500 is used to treat wastewater.

[0043] Waste processing equipment 600 is connected to the other side of the filter frame 100; waste processing equipment 600 is used to process waste.

[0044] Combination Figure 1 The usage process of this invention is as follows: Wastewater is introduced into the filter frame 100. As the wastewater falls, it drives the drive assembly 210 to work. The drive assembly 210 drives the retrieval assembly 220 on its three connecting shafts 218 to rotate, continuously retrieval the wastewater and removing impurities. After the retrieval assembly 220 retrieves the impurities from the wastewater, it continues to rotate and moves to the vicinity of the auxiliary discharge assembly 230. The rotating wheel 224 of the retrieval assembly 220 is in contact with the flat plate 231 of the auxiliary discharge assembly 230, and the rotating wheel 224 rotates on the flat plate 231, thereby causing the retrieval frame to... Rotate 225 degrees to pour the retrieved impurities into the sewage trough 130. The impurities fall into the sewage trough 130 and are crushed by the crushing component 300 inside the sewage trough 130. After being crushed, the impurities fall onto the first filter screen 140. The inclined first filter screen 140 causes the impurities to roll into the waste treatment equipment 600, and the wastewater in the impurities flows back into the filter frame 100 through the return port 150. The impurities in the wastewater are continuously retrieved until they are almost completely removed. Then, the wastewater is pumped by the wastewater pump 400 to discharge the filtered wastewater into the wastewater treatment equipment 500 for treatment.

[0045] Figure 2 The diagram shown is a structural schematic of a second embodiment of a high-salt, high-concentration organic wastewater treatment device according to the present invention. Please refer to [link / reference]. Figure 2Unlike the above embodiments, the driving assembly 210 includes a first driving wheel 211, driving blades 212, a first transmission wheel 213, a first transmission belt 214, a second transmission wheel 215, a second driving wheel 216, rotating rods 217, and connecting shafts 218. The first driving wheel 211 is rotatably connected to a connecting frame. Six driving blades 212 are equidistantly annularly welded on the first driving wheel 211. The first transmission wheel 213 is welded to the center of the front wall of the first driving wheel 211. The first transmission wheel 213 is rotatably connected to the second transmission wheel 215 via the first transmission belt 214. The second transmission wheel 215 is rotatably connected to the center of the connecting frame. The second driving wheel 216 is welded to the center of the rear wall of the second transmission wheel 215. Three rotating rods 217 are equidistantly annularly welded on the second driving wheel 216. Three connecting shafts 218 are vertically forward welded to the ends of the three rotating rods 217. The three connecting shafts 218 are rotatably connected to three salvage assemblies 220 respectively.

[0046] Therefore, in this embodiment, the water flow drives the drive blade 212 to rotate, the drive blade 212 drives the first drive wheel 211 to rotate, the first drive wheel 211 drives the first transmission wheel 213 to rotate, the first transmission wheel 213 drives the second transmission wheel 215 to rotate via the first transmission belt 214, the second transmission wheel 215 drives the second drive wheel 216 to rotate, the second drive wheel 216 drives the rotating rod 217 to rotate, the rotating rod 217 drives the connecting shaft 218 to rotate, and the connecting shaft 218 causes the rotating sleeve 221 to rotate on the connecting shaft 218.

[0047] Figures 3-4 The diagram shown is a structural schematic of a third embodiment of a high-salt, high-concentration organic wastewater treatment device according to the present invention. Please refer to [link / reference]. Figures 3-4 Unlike the above embodiments, the salvage assembly 220 includes a rotating sleeve 221, a second transmission belt 222, a third transmission wheel 223, a rotating wheel 224, a salvage frame 225, and a second filter screen 226. The rotating sleeve 221 is rotatably connected to the connecting shaft 218 of the drive assembly 210. The front end of the side wall of the rotating sleeve 221 is rotatably connected to the third transmission wheel 223 via the second transmission belt 222. The rear wall of the third transmission wheel 223 is welded to the rotating wheel 224. The rotating wheel 224 rotates 360° when passing through the auxiliary discharge assembly 230. The bottom end of the side wall of the rotating sleeve 221 is welded to the salvage frame 225. The second filter screen 226 is embedded in the through groove in the middle of the salvage frame 225. The third transmission wheel 223 is rotatably connected to the connecting shaft 218 via a connecting frame 227.

[0048] Therefore, in this embodiment, the retrieval frame 225 is fixed by the rotating sleeve 221. The retrieval frame 225 and the second filter screen 226 retrieve wastewater. When the rotating wheel 224 passes the plate 231, the rotating wheel 224 moves on the plate 231, driving the third transmission wheel 223 to rotate. The third transmission wheel 223 drives the rotating sleeve 221 to rotate through the second transmission belt 222. The rotating sleeve 221 drives the retrieval frame 225 to rotate, causing impurities to fall into the sewage trough 130.

[0049] Figure 5 The diagram shown is a structural schematic of a fourth embodiment of a high-salt, high-concentration organic wastewater treatment device according to the present invention. Please refer to [link / reference]. Figure 5 Unlike the above embodiments, the auxiliary discharge assembly 230 includes a plate 231, a friction layer 232, a clamping rod 233, a clamping spring 234, and a fixing rod 235. The friction layer 232 is installed on the side wall of the plate 231 near the retrieval assembly 220. The plate 231 is matched with the rotating wheel 224. The clamping rods 233 are installed at the four corners of the other side wall of the plate 231. The clamping rods 233 are connected to the sliding grooves opened inside the fixing rod 235 through the clamping springs 234, and the clamping rods 233 are movably connected in the sliding grooves inside the fixing rod 235.

[0050] Therefore, in this embodiment, the friction layer 232 enables the rotating wheel 224 to move on the plate 231, and as the rotating wheel 224 extends, the clamping rod 233 moves along the groove in the fixed rod 235, and through the cooperation of the clamping spring 234, the plate 231 is always kept in contact with the rotating wheel 224.

[0051] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A device for treating high-salt, high-concentration organic wastewater, characterized in that, include: The filter frame (100) is a box structure with a rectangular chamber inside; The wastewater filtration assembly (200) includes a drive assembly (210), a retrieval assembly (220), and an auxiliary discharge assembly (230). The drive assembly (210) is installed inside the filter frame (100), and three movable parts of the drive assembly (210) are connected to three retrieval assemblies (220). The auxiliary discharge assembly (230) is installed on one side inside the filter frame (100). A pulverizing component (300) is installed on the outer side of the filter frame (100), and the pulverizing part of the pulverizing component (300) is located inside the filter frame (100); A sewage pump (400) is connected to the outer side of a filter frame (100); Wastewater treatment equipment (500) is connected to a wastewater pump (400); Waste treatment equipment (600) is connected to the other side of the outside of the filter frame (100); The salvage assembly (220) includes a rotating sleeve (221), a second transmission belt (222), a third transmission wheel (223), a rotating wheel (224), a salvage frame (225), and a second filter screen (226). The rotating sleeve (221) is movably connected to the connecting shaft (218) of the drive assembly (210). The front end of the side wall of the rotating sleeve (221) is connected to the third transmission wheel (223) via the second transmission belt (222). The rear wall of the third transmission wheel (223) is equipped with a rotating wheel (224). The rotating wheel (224) rotates 360° when passing through the auxiliary discharge assembly (230). The bottom end of the side wall of the rotating sleeve (221) is equipped with a salvage frame (225). The second filter screen (226) is installed in the through groove opened in the middle of the salvage frame (225). The third transmission wheel (223) is movably connected to the connecting shaft (218) via a connecting frame (227). The auxiliary discharge assembly (230) includes a plate (231), a friction layer (232), a clamping rod (233), a clamping spring (234), and a fixing rod (235). The friction layer (232) is installed on the side wall of the plate (231) near the retrieval assembly (220). The plate (231) is matched with the rotating wheel (224). The clamping rod (233) is installed at each of the four corners of the other side wall of the plate (231). The clamping rod (233) is connected to the sliding groove opened inside the fixing rod (235) through the clamping spring (234), and the clamping rod (233) is movably connected in the sliding groove inside the fixing rod (235).

2. The high-salt, high-concentration organic wastewater treatment device according to claim 1, characterized in that, The filter frame (100) has a feed inlet (110) at the top and a guide frame (120) installed at the top inside the filter frame (100). A drain trough (130) is provided at the bottom of one side of the filter frame (100). An inclined first filter screen (140) is provided inside the drain trough (130). An inclined surface opposite to the inclined direction of the first filter screen (140) is provided at the bottom of the drain trough (130). A crushing part of a crushing component (300) is provided inside the drain trough (130). A return port (150) is provided at the end of the inclined surface at the bottom of the drain trough (130).

3. The high-salt, high-concentration organic wastewater treatment device according to claim 1, characterized in that, The drive assembly (210) includes a first drive wheel (211), drive blades (212), a first transmission wheel (213), a first transmission belt (214), a second transmission wheel (215), a second drive wheel (216), a rotating rod (217), and a connecting shaft (218). The first drive wheel (211) is movably connected to a connecting frame. Six drive blades (212) are equidistantly and annularly mounted on the first drive wheel (211). The first transmission wheel (213) is mounted at the center of the front wall of the first drive wheel (211). The transmission wheel (213) is connected to the second transmission wheel (215) via the first transmission belt (214). The second transmission wheel (215) is movably connected to the center of the connecting frame. The second drive wheel (216) is installed at the center of the rear wall of the second transmission wheel (215). Three rotating rods (217) are equidistantly and annularly installed on the second drive wheel (216). The ends of the three rotating rods (217) are vertically and forwardly installed with three connecting shafts (218). The three connecting shafts (218) are movably connected to three salvage components (220).

4. The high-salt, high-concentration organic wastewater treatment device according to claim 2, characterized in that, The pulverizing assembly (300) includes a rotary motor (310), a first bevel gear (320), a second bevel gear (330), a drive shaft (340), a pulverizing roller (350), a third bevel gear (360), a rotary joint (370), a fourth bevel gear (380), and a fifth bevel gear (390). The rotary motor (310) is mounted on the outer side wall of the filter frame (100). The first bevel gear (320) is mounted on the output end of the rotary motor (310). The first bevel gear (320) is vertically and movably connected to the second bevel gear (330). The second bevel gear (330) is vertically... A third bevel gear (360) is directly connected to the second bevel gear (330). The third bevel gear (360) is coaxially and in opposite directions connected to a fourth bevel gear (380) via a rotary joint (370). The fourth bevel gear (380) is vertically connected to a fifth bevel gear (390). A drive shaft (340) is vertically installed at the center of one side wall of the second bevel gear (330) and the center of one side wall of the fifth bevel gear (390). The two drive shafts (340) penetrate into the connecting frame and are movably connected to the inner wall of the sewage tank (130). Two cooperating crushing rollers (350) are installed on the two drive shafts (340).

5. A method for treating high-salt, high-concentration organic wastewater, characterized in that, Includes the following steps; S1: The sewage is introduced into the filter frame (100). During the process of the sewage falling, the drive component (210) is driven to work. The drive component (210) drives the retrieval component (220) on its three connecting shafts (218) to rotate, continuously retrieval the sewage and remove impurities from the sewage. S2: After the retrieval component (220) retrieves the impurities in the sewage, it continues to rotate and moves to the vicinity of the auxiliary discharge component (230). The rotating wheel (224) of the retrieval component (220) is in contact with the plate (231) of the auxiliary discharge component (230), and the rotating wheel (224) rotates on the plate (231), thereby causing the retrieval frame (225) to rotate and pour the retrieved impurities into the sewage trough (130). S3: Impurities fall into the drain tank (130), are crushed by the crushing component (300) in the drain tank (130), and fall onto the first filter screen (140) after being crushed. The impurities are rolled into the waste treatment equipment (600) by the inclined first filter screen (140), and the wastewater in the impurities flows back into the filter frame (100) through the return port (150). S4: Continuously remove impurities from the sewage until the impurities are almost completely removed, then use a sewage pump (400) to discharge the filtered sewage into a sewage treatment device (500) for treatment.

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