Sewage treatment device and use method thereof

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device and a use method thereof. The device comprises a sewage tank and a sealing plate sewage tank, the sealing plate sewage tank comprises a water containing part and a precipitation part, a water inlet and a water outlet are formed in the two sides of the sealing plate water containing part respectively, a filter sieve is arranged in the water outlet of the sealing plate, a sealing assembly is arranged at the end of the water outlet of the sealing plate, and a decontamination assembly is arranged in the water containing part of the sealing plate. When the screw rod rotates, the movable plate is driven to horizontally move on the surface, and when the movable plate moves, reagent boxes arranged on the two sides of the surface of the movable plate feed a coagulant into the sewage, so that impurities in the sewage are uniformly mixed with the coagulant, and the sewage treatment effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sewage treatment device and a method for using the same. Background Art

[0002] When treating sewage, it is difficult to remove impurities (colloidal particles, fine suspended matter) in the sewage through natural sedimentation.

[0003] There are many existing technologies for sewage treatment equipment, such as: Chinese patent publication number CN112062349A discloses a sewage treatment tank, including a tank body and a filter plate, wherein the bottom end of the tank body is fixedly connected to a first motor, the output end of the first motor is fixedly connected to a stirring shaft, the top end of the stirring shaft passes through and extends to the interior of the tank body, the stirring shaft is rotatably connected to the tank body, a plurality of stirring rods are evenly fixedly connected to the outside of the stirring shaft, a fixing ring is fixedly connected to the inside of the tank body, the fixing ring is arranged above the stirring shaft, a conical bucket is arranged inside the fixing ring, the bottom end of the conical bucket is connected to a water outlet pipe, a first solenoid valve is arranged on the water outlet pipe, a first isolation net is fixedly connected to the bottom side of the inside of the conical bucket, and activated carbon is placed inside the conical bucket; the tank body can fully treat sewage, prevent the filter plate from being blocked, improve the filtering effect, facilitate disassembly and cleaning, and improve the practicality of its use.

[0004] However, there are still some problems in actual use: 1. During the forging process of traditional automotive parts, impurities are adsorbed and precipitated by adding coagulants to the water. However, the mixing efficiency of the coagulant and sewage is low, and workers are required to stir the sewage with coagulants, which increases the labor intensity of the operation. 2. When the purified sewage is discharged, the water convection can easily impact the impurities that have settled to the bottom, causing some of the precipitated impurities to be mixed again in the purified water, affecting the sewage treatment effect.

[0005] In view of this, we propose a sewage treatment device and a method for using the same. Summary of the Invention

[0006] The object of the present invention is to provide a sewage treatment device and a method of using the same to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention aims to provide a sewage treatment device, including a sewage tank, the sewage tank including a water filling part and a sedimentation part, a water inlet and a water outlet are respectively provided on both sides of the water filling part, a filter screen is provided inside the water outlet, a sealing component is provided at the end of the water outlet, the sealing component is used to reduce the contamination of the filter screen by impurities, a decontamination component is provided inside the water filling part, the decontamination component is used to add coagulant to the sewage to purify the sewage, the coagulant adsorbs impurities in the water and falls into the bottom of the sedimentation part, isolation components are provided on both sides of the water filling part, the isolation components are used to isolate impurities in the sewage, and at the same time, when the sewage is purified and flows out, the convection of the water body between the water filling part and the sedimentation part is reduced, so that the impurities settled in the sedimentation part are in a stable state.

[0008] As a further improvement of this technical solution, the sealing assembly includes a sliding rail arranged at the end of the water outlet, and a sealing plate is slidingly provided on the inner wall of the sliding rail. When the sealing plate moves to the end of the water outlet, it seals it, and a compression spring is provided between the sliding rail and the sealing plate.

[0009] As a further improvement of the present technical solution, a rotating motor is provided above the water outlet, the output shaft of the rotating motor passes through the water outlet and an eccentric wheel is provided at the end thereof, and the eccentric wheel squeezes the top of the sealing plate when it rotates.

[0010] As a further improvement of the present technical solution, the dirt removal component includes a servo motor arranged on one side of the water filling part, a screw rod is provided at the end of the output shaft of the servo motor, a movable plate is provided on the surface of the screw rod, and a medicine box is provided on both sides of the surface of the movable plate, and the medicine box is used to add coagulant into the sewage.

[0011] As a further improvement of the present technical solution, a connecting rod is provided at the bottom of the movable plate, a frame is fixed at the bottom of the connecting rod, a friction roller is provided inside the frame, the bottom of the friction roller is in contact with the sedimentation part, and the friction roller rotates on the surface of the sedimentation part when it moves. Gear rods are provided on both sides of the friction roller, and the gear rods rotate coaxially with the friction roller.

[0012] As a further improvement of this technical solution, a pinion is provided on one side of the friction roller, the gear ratio of the gear rod and the pinion is 2:1, and a stirring fan is provided on the top of the pinion. When the stirring fan rotates, the sewage is stirred to accelerate the mixing of the coagulant and the sewage.

[0013] As a further improvement of this technical solution, the isolation assembly includes support rods arranged on both sides of the inner wall of the water filling part, a baffle is provided on the surface of the support rod, the baffle is in contact with the inner wall of the water filling part, and rotating gears are provided on both sides of the support rod.

[0014] As a further improvement of the present technical solution, a cylinder is provided above the baffle, and a rack is provided on the piston rod at the end of the cylinder. When the rack moves in the vertical direction, it drives the support rod to engage and rotate.

[0015] As a further improvement of the present technical solution, a cleaning assembly is provided on the surface of the connecting rod, and the cleaning assembly includes a substrate provided on both sides of the surface of the connecting rod, a column tube is provided at the bottom of the substrate, a sliding rod is provided for sliding on the inner wall of the column tube, the sliding rod passes through the substrate and a scraper is provided at the end, an elastic member is provided between the substrate and the column tube, and the scraper moves in contact with the surface of the baffle.

[0016] A second object of the present invention is to provide a sewage treatment method, comprising any one of the above-mentioned sewage treatment devices, comprising the following steps: S1. Control the output end of the servo motor to drive the screw to rotate. When the screw rotates, the movable plate moves horizontally on its surface. When the movable plate moves, the reagent boxes on both sides of its surface inject coagulant into the sewage. S2. The piston rod at the end of the control cylinder drives the rack to move downward in the vertical direction. During the movement of the rack, the rotating gear is engaged and rotated. When the baffle rotates to a position perpendicular to the water filling part, impurities attached to the surface of the baffle are moved away from the water filling part. S3. Control the output shaft of the rotating motor to drive the eccentric wheel to rotate, so that the eccentric end of the eccentric wheel rotates to fit with the top of the sealing plate. During the rotation of the eccentric wheel, the sealing plate slides on the inner wall of the sliding rail due to the squeezing force of the eccentric wheel. During the sliding process of the sealing plate, the compression spring is squeezed at the same time. When the eccentric end of the eccentric wheel fits with the top of the sealing plate, the sealing plate seals the end of the water outlet.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In the sewage treatment device and its use method, the output end of the servo motor is controlled to drive the screw to rotate. When the screw rotates, the movable plate is driven to move horizontally on its surface. When the movable plate moves, the reagent boxes provided on both sides of its surface add coagulant into the sewage, so that the impurities in the sewage are evenly mixed with the coagulant, thereby improving the sewage treatment effect.

[0018] 2. In the sewage treatment device and its use method, the rack is driven to move downward in the vertical direction by controlling the piston rod at the end of the cylinder. During the movement of the rack, the rotating gear is driven to engage and rotate. When the baffle rotates to a vertical position with the water filling part, the impurities attached to the surface of the baffle are kept away from the water filling part, that is, the impurities attached to the surface of the baffle are kept away from the purified water inside the water filling part. When the purified sewage is output, the service life of the filter screen is improved. At the same time, when the purified water is output, the baffle reduces the water convection between the water filling part and the sedimentation part, so that the impurities settled to the bottom of the sedimentation part are in a stable state. When the purified water is output, the piston rod at the end of the cylinder is controlled to drive the rack to descend in the vertical direction. When the rack moves, it drives the rotating gear to rotate in the opposite direction until the baffle on the surface of the support rod rotates to fit the inner wall of the water filling part.

[0019] 3. In the sewage treatment device and the method of using the same, the movable plate is controlled to move horizontally, and the movable plate drives the connecting rod to move during the movement, and the base plates provided on both sides of the surface of the connecting rod move. During the movement of the base plates, the scraper scrapes the surface of the baffle. When the scraper is squeezed, the slide rod slides on the inner wall of the cylinder and squeezes the elastic member at the same time, so that the scraper fits tightly to the surface of the baffle when scraping impurities attached to the surface of the baffle, thereby improving the cleaning effect of impurities attached to the surface of the baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the expansion of the isolation assembly of the present invention; Figure 4 This is a schematic structural diagram of the sealing assembly of the present invention; Figure 5 This is a schematic structural diagram of the decontamination assembly of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of point A; Figure 7 A partial schematic diagram of a dirt removal assembly of the present invention; Figure 8 Schematic diagram of the isolation assembly structure of the present invention.

[0021] The meaning of each number in the figure is: 100, sewage tank; 101, water filling unit; 102, sedimentation unit; 103, water inlet; 104, water outlet; 200, sliding rail; 201, sealing plate; 202, compression spring; 203, rotating motor; 204, eccentric wheel; 300, dirt removal assembly; 301, servo motor; 302, lead screw; 303, moving plate; 304, medicine box; 305, connecting rod; 306, frame; 307, friction roller; 308, gear rod; 309, sub-gear; 310, stirring fan; 400, isolation assembly; 401, support rod; 402, baffle; 403, rotating gear; 404, cylinder; 405, rack; 500, cleaning assembly; 501, substrate; 502, column; 503, slide rod; 504, elastic member; 505, scraper. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0024] The purpose of this embodiment is to provide a sewage treatment device, see Figures 1-8 As shown, it includes a sewage tank 100, which includes a water filling part 101 and a sedimentation part 102. A water inlet 103 and a water outlet 104 are respectively provided on both sides of the water filling part 101. A filter screen is provided inside the water outlet 104, and a sealing component is provided at the end of the water outlet 104. The sealing component is used to reduce the contamination of the filter screen by impurities. A decontamination component 300 is provided inside the water filling part 101. The decontamination component 300 is used to add a coagulant to the sewage to purify the sewage. The coagulant absorbs impurities in the water and drops them into the bottom of the sedimentation part 102. Isolation components 400 are provided on both sides of the water filling part 101. The isolation components 400 are used to isolate impurities in the sewage. At the same time, when the sewage is purified and flows out, the convection of the water body between the water filling part 101 and the sedimentation part 102 is reduced, so that the impurities settled in the sedimentation part 102 are in a stable state.

[0025] Taking into account that the sewage in the sewage tank 100 can easily contaminate the filter screen provided inside the water outlet 104, thereby reducing the service life of the filter screen, the sealing assembly includes a sliding rail 200 provided at the end of the water outlet 104, and a sealing plate 201 is slidingly provided on the inner wall of the sliding rail 200. When the sealing plate 201 moves to the end of the water outlet 104, it is sealed. A compression spring 202 is provided between the sliding rail 200 and the sealing plate 201, and a rotating motor 203 is provided above the water outlet 104. The output shaft of the rotating motor 203 passes through the water outlet 104 and an eccentric wheel 204 is provided at the end. When the eccentric wheel 204 rotates, it squeezes the top of the sealing plate 201. By arranging the sealing plate 201 above the water outlet 104, when the sewage is processed, the output shaft of the rotating motor 203 is controlled to drive the eccentric wheel 204 to rotate, so that the eccentric end of the eccentric wheel 204 rotates to the point where it is aligned with the top of the sealing plate 201 When the eccentric wheel 204 rotates, the sealing plate 201 is squeezed by the eccentric wheel 204 and slides on the inner wall of the sliding rail 200. The sealing plate 201 squeezes the compression spring 202 during the sliding process. When the eccentric end of the eccentric wheel 204 fits with the top of the sealing plate 201, the sealing plate 201 seals the end of the water outlet 104 to prevent sewage from contaminating the filter screen inside the water outlet 104. When the sewage inside the sewage tank 100 is purified, the output end of the rotating motor 203 is controlled to drive the eccentric wheel 204 to rotate, so that the eccentric end of the eccentric wheel 204 is away from the surface of the sealing plate 201. The sealing plate 201 is subjected to the restoring force of the compression spring 202, so that the sealing plate 201 is away from the end of the water outlet 104, and the purified sewage is filtered twice through the filter screen inside the water outlet 104, thereby ensuring the cleanliness of the water body and improving the service life of the filter screen.

[0026] When treating sewage, since the sewage is mixed with impurities (colloidal particles, fine suspended matter), it is difficult to remove them by natural sedimentation. In order to quickly clean the impurities and settle them, the decontamination component 300 includes a servo motor 301 arranged on one side of the water filling part 101, and a screw rod 302 is provided at the end of the output shaft of the servo motor 301. A movable plate 303 is provided on the surface of the screw rod 302, and a medicine box 304 is provided on both sides of the surface of the movable plate 303. The medicine box 304 is used to add coagulant into the sewage. The output end of the servo motor 301 is controlled to drive the screw rod 302 to rotate. When the screw rod 302 rotates, it drives the movable plate 303 to move horizontally on its surface. When the movable plate 303 moves, the medicine boxes 304 on both sides of its surface add coagulant into the sewage, so that the impurities in the sewage are evenly mixed with the coagulant, thereby improving the sewage treatment effect.

[0027] In order to improve the mixing effect of the coagulant and the sewage and improve the purification efficiency, a connecting rod 305 is provided at the bottom of the movable plate 303, a frame 306 is fixed at the bottom of the connecting rod 305, a friction roller 307 is provided inside the frame 306, the bottom of the friction roller 307 is in contact with the sedimentation part 102, and the friction roller 307 rotates on the surface of the sedimentation part 102 when it moves, and gear rods 308 are provided on both sides of the friction roller 307. The gear rod 308 rotates coaxially with the friction roller 307, and a sub-gear 309 is provided on one side of the friction roller 307. The gear ratio of the gear rod 308 to the sub-gear 309 is 2:1. A stirring fan 310 is provided on the top of the sub-gear 309. When the stirring fan 310 rotates, the sewage is stirred to accelerate The coagulant is mixed with the sewage. When the movable plate 303 moves horizontally on the surface of the screw rod 302, the movable plate 303 drives the connecting rod 305 to move horizontally. When the connecting rod 305 moves, it drives the friction roller 307 to move in contact with the bottom of the sedimentation part 102. The friction roller 307 rotates at the bottom of the sedimentation part 102 due to the friction force. When the friction roller 307 rotates, it drives the gear rod 308 to rotate coaxially. When the gear rod 308 rotates, it drives the sub-gear 309 to engage and rotate. Since the gear ratio of the gear rod 308 and the sub-gear 309 is 2:1, the stirring fan 310 provided on the top of the sub-gear 309 quickly stirs the sewage, accelerates the mixing of the coagulant and impurities in the sewage, thereby improving the sewage purification efficiency.

[0028] Taking into account that impurities in sewage are easily attached to the inner wall of the water filling part 101, when the sewage purification is completed and the water is discharged through the water outlet 104, the impurities attached to the inner wall of the water filling part 101 enter the filter screen inside the water outlet 104, resulting in a reduction in the service life of the filter screen. Therefore, the isolation component 400 includes a support rod 401 provided on both sides of the inner wall of the water filling part 101, a baffle 402 is provided on the surface of the support rod 401, and the baffle 402 is in contact with the inner wall of the water filling part 101. A rotating gear 403 is provided on both sides of the support rod 401, and a cylinder 404 is provided above the baffle 402. The piston rod at the end of the cylinder 404 is provided with a rack 405. When the rack 405 moves in the vertical direction, it drives the support rod 401 to engage and rotate. When the sewage is treated, the baffle 402 provided on the surface of the support rod 401 is in contact with the inner wall of the water filling part 101, so that the impurities in the sewage adhere to the surface of the baffle 402. When the sewage purification is completed, the control cylinder 40 4, when the purified sewage is discharged, the service life of the filter screen is improved. At the same time, when the purified water is discharged, the baffle 402 reduces the water convection between the water filling part 101 and the sedimentation part 102, so that the impurities settled to the bottom of the sedimentation part 102 are in a stable state. When the purified water is discharged, the piston rod at the end of the control cylinder 404 drives the rack 405 to rise in the vertical direction. When the rack 405 moves, it drives the rotating gear 403 to rotate in the opposite direction until the baffle 402 on the surface of the support rod 401 rotates to fit the inner wall of the water filling part 101.

[0029] Considering that impurities attached to the surface of the baffle 402 are not easy to clean, a cleaning assembly 500 is provided on the surface of the connecting rod 305. The cleaning assembly 500 includes a base plate 501 provided on both sides of the surface of the connecting rod 305. A column 502 is provided at the bottom of the base plate 501. A sliding rod 503 is provided on the inner wall of the column 502. The sliding rod 503 passes through the base plate 501 and a scraper 505 is provided at the end. An elastic member 504 is provided between the base plate 501 and the column 502. The scraper 505 moves along the surface of the baffle 402. When the sewage treatment is completed, the scraper 505 is moved by controlling the movement. The plate 303 moves horizontally, and the movable plate 303 drives the connecting rod 305 to move during the movement. The base plates 501 provided on both sides of the surface of the connecting rod 305 move. During the movement of the base plates 501, the scraper 505 scrapes the surface of the baffle 402. When the scraper 505 is squeezed, the slide bar 503 slides on the inner wall of the cylinder 502 and squeezes the elastic member 504 at the same time, so that the scraper 505 is tightly attached to the surface of the baffle 402 when scraping the impurities attached to the surface of the baffle 402, thereby improving the cleaning effect of the impurities attached to the surface of the baffle 402.

[0030] In specific use, sewage is injected into the sewage tank 100 through the water inlet 103, and the output end of the servo motor 301 is controlled to drive the screw 302 to rotate. When the screw 302 rotates, the movable plate 303 moves horizontally on its surface. When the movable plate 303 moves, the reagent boxes 304 on both sides of its surface inject coagulant into the sewage, so that impurities in the sewage are evenly mixed with the coagulant, thereby improving the sewage treatment effect; When the movable plate 303 moves horizontally on the surface of the screw rod 302, the movable plate 303 drives the connecting rod 305 to move horizontally. When the connecting rod 305 moves, it drives the friction roller 307 to move in contact with the bottom of the sedimentation portion 102. The friction roller 307 rotates at the bottom of the sedimentation portion 102 due to the friction force. When the friction roller 307 rotates, it drives the gear rod 308 to rotate coaxially. When the gear rod 308 rotates, it drives the pinion 309 to engage and rotate. Since the gear ratio of the gear rod 308 and the pinion 309 is 2:1, the stirring fan 310 provided on the top of the pinion 309 quickly stirs the sewage, accelerates the mixing of the coagulant and impurities in the sewage, thereby improving the sewage purification efficiency. When the sewage purification is completed, the piston rod at the end of the control cylinder 404 drives the rack 405 to move downward in the vertical direction. During the movement of the rack 405, the rotating gear 403 is engaged and rotated. When the baffle 402 rotates to a vertical position with the water filling part 101, the impurities attached to the surface of the baffle 402 are moved away from the water filling part 101, that is, the impurities attached to the surface of the baffle 402 are moved away from the purified water inside the water filling part 101. When the purified sewage is output, the service life of the filter screen is improved. At the same time, when the purified water is output, the baffle 402 reduces the water convection between the water filling part 101 and the sedimentation part 102, so that the impurities settled to the bottom of the sedimentation part 102 are in a stable state. When the purified water is output, the piston rod at the end of the control cylinder 404 drives the rack 405 to descend in the vertical direction. When the rack 405 moves, it drives the rotating gear 403 to rotate in the opposite direction until the baffle 402 on the surface of the support rod 401 rotates to fit the inner wall of the water filling part 101. The output shaft of the control rotating motor 203 drives the eccentric wheel 204 to rotate, so that the eccentric end of the eccentric wheel 204 rotates to fit with the top of the sealing plate 201. During the rotation of the eccentric wheel 204, the sealing plate 201 is squeezed by the eccentric wheel 204 and slides on the inner wall of the sliding rail 200. During the sliding process of the sealing plate 201, the compression spring 202 is squeezed at the same time. When the eccentric end of the eccentric wheel 204 fits with the top of the sealing plate 201, the sealing plate 201 seals the end of the water outlet 104 to prevent sewage from reaching the water outlet 104. 04 is polluted. When the sewage inside the sewage tank 100 is purified, the output end of the rotating motor 203 is controlled to drive the eccentric wheel 204 to rotate, so that the eccentric end of the eccentric wheel 204 is away from the surface of the sealing plate 201. The sealing plate 201 is acted upon by the restoring force of the compression spring 202, so that the sealing plate 201 is away from the end of the water outlet 104. The purified sewage is filtered twice through the filter screen inside the water outlet 104, thereby ensuring the cleanliness of the water body and improving the service life of the filter screen. By controlling the horizontal movement of the movable plate 303, the movable plate 303 drives the connecting rod 305 to move during the movement, and the base plates 501 provided on both sides of the surface of the connecting rod 305 move. During the movement of the base plates 501, the scraper 505 scrapes the surface of the baffle 402. When the scraper 505 is squeezed, the slide bar 503 slides on the inner wall of the cylinder 502 and squeezes the elastic member 504 at the same time, so that the scraper 505 is tightly attached to the surface of the baffle 402 when scraping the impurities attached to the surface of the baffle 402, thereby improving the cleaning effect of the impurities attached to the surface of the baffle 402.

[0031] A second object of the present invention is to provide a sewage treatment method, comprising any one of the above-mentioned sewage treatment devices, comprising the following steps: S1. Control the output end of the servo motor 301 to drive the screw 302 to rotate. When the screw 302 rotates, it drives the movable plate 303 to move horizontally on its surface. When the movable plate 303 moves, the reagent boxes 304 on both sides of its surface inject coagulant into the sewage. S2. The piston rod at the end of the control cylinder 404 drives the rack 405 to move downward in the vertical direction. During the movement of the rack 405, the rotating gear 403 is engaged and rotated. When the baffle 402 rotates to a position perpendicular to the water filling part 101, impurities attached to the surface of the baffle 402 are moved away from the water filling part 101. S3. Control the output shaft of the rotating motor 203 to drive the eccentric wheel 204 to rotate, so that the eccentric end of the eccentric wheel 204 rotates to fit with the top of the sealing plate 201. During the rotation of the eccentric wheel 204, the sealing plate 201 slides on the inner wall of the sliding rail 200 due to the squeezing force of the eccentric wheel 204. During the sliding process of the sealing plate 201, the compression spring 202 is squeezed at the same time. When the eccentric end of the eccentric wheel 204 fits with the top of the sealing plate 201, the sealing plate 201 seals the end of the water outlet 104.

[0032] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A sewage treatment device, characterized in that: The invention comprises a sewage tank (100), wherein the sewage tank (100) comprises a water filling portion (101) and a sedimentation portion (102), wherein a water inlet (103) and a water outlet (104) are respectively provided on both sides of the water filling portion (101), wherein a filter screen is provided inside the water outlet (104), and a sealing component is provided at the end of the water outlet (104), wherein the sealing component is used to reduce contamination of the filter screen by impurities, wherein a decontamination component (300) is provided inside the water filling portion (101), wherein the decontamination component (300) is used to add a coagulant to the sewage to purify the sewage, wherein the coagulant adsorbs impurities in the water and causes the impurities to fall into the bottom of the sedimentation portion (102), wherein isolation components (400) are provided on both sides of the water filling portion (101), wherein the isolation components (400) are used to isolate impurities in the sewage, and simultaneously reduce convection of water between the water filling portion (101) and the sedimentation portion (102) when the sewage is purified and flows out, so that the impurities settled in the sedimentation portion (102) are in a stable state.

2. The sewage treatment device according to claim 1, characterized in that: The sealing assembly comprises a sliding rail (200) provided at the end of the water outlet (104); a sealing plate (201) is provided on the inner wall of the sliding rail (200) for sliding movement; the sealing plate (201) seals the end of the water outlet (104) when it moves to the end; a compression spring (202) is provided between the sliding rail (200) and the sealing plate (201).

3. The sewage treatment device according to claim 2, characterized in that: A rotating motor (203) is provided above the water outlet (104). An output shaft of the rotating motor (203) passes through the water outlet (104) and an eccentric wheel (204) is provided at the end thereof. When the eccentric wheel (204) rotates, it squeezes the top of the sealing plate (201).

4. The sewage treatment device according to claim 1, characterized in that: The decontamination assembly (300) comprises a servo motor (301) provided on one side of the water filling portion (101); a screw rod (302) is provided at the end of the output shaft of the servo motor (301); a movable plate (303) is provided on the surface of the screw rod (302); and a medicine box (304) is provided on both sides of the surface of the movable plate (303); the medicine box (304) is used for adding a coagulant into the sewage.

5. The sewage treatment device according to claim 4, characterized in that: A connecting rod (305) is provided at the bottom of the movable plate (303), a frame (306) is fixed at the bottom of the connecting rod (305), a friction roller (307) is provided inside the frame (306), the bottom of the friction roller (307) is in contact with the sedimentation portion (102), and the friction roller (307) rotates on the surface of the sedimentation portion (102) when moving. Gear rods (308) are provided on both sides of the friction roller (307), and the gear rods (308) rotate coaxially with the friction roller (307).

6. The sewage treatment device according to claim 5, characterized in that: A pinion gear (309) is provided on one side of the friction roller (307), and the gear ratio between the gear rod (308) and the pinion gear (309) is 2:

1. A stirring fan (310) is provided on the top of the pinion gear (309). When the stirring fan (310) rotates, the sewage is stirred to accelerate the mixing of the coagulant and the sewage.

7. The sewage treatment device according to claim 1, characterized in that: The isolation assembly (400) comprises support rods (401) provided on both sides of the inner wall of the water filling portion (101); baffles (402) are provided on the surface of the support rods (401); the baffles (402) are in contact with the inner wall of the water filling portion (101); and rotating gears (403) are provided on both sides of the support rods (401).

8. The sewage treatment device according to claim 7, characterized in that: A cylinder (404) is provided above the baffle (402), and a piston rod at the end of the cylinder (404) is provided with a rack (405). When the rack (405) moves in a vertical direction, it drives the support rod (401) to engage and rotate.

9. The sewage treatment device according to claim 5, characterized in that: A cleaning assembly (500) is provided on the surface of the connecting rod (305), and the cleaning assembly (500) includes substrates (501) provided on both sides of the surface of the connecting rod (305), a column (502) is provided at the bottom of each substrate (501), a sliding rod (503) is provided on the inner wall of the column (502), the sliding rod (503) passes through the substrate (501) and a scraper (505) is provided at the end thereof, an elastic member (504) is provided between the substrate (501) and the column (502), and the scraper (505) moves in contact with the surface of the baffle (402).

10. A sewage treatment method, implemented by the sewage treatment device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, controlling the output end of the servo motor (301) to drive the screw (302) to rotate, and when the screw (302) rotates, the movable plate (303) is driven to move horizontally on its surface, and when the movable plate (303) moves, the reagent boxes (304) provided on both sides of the surface thereof inject a coagulant into the sewage; S2, the piston rod at the end of the control cylinder (404) drives the rack (405) to move downward in the vertical direction, and the rack (405) drives the rotating gear (403) to engage and rotate during the movement. When the baffle (402) rotates to a state perpendicular to the water filling part (101), impurities attached to the surface of the baffle (402) are moved away from the water filling part (101); S3. Control the output shaft of the rotating motor (203) to drive the eccentric wheel (204) to rotate, so that the eccentric end of the eccentric wheel (204) rotates until it fits with the top of the sealing plate (201). During the rotation of the eccentric wheel (204), the sealing plate (201) slides on the inner wall of the sliding rail (200) under the squeezing force of the eccentric wheel (204). During the sliding process of the sealing plate (201), the compression spring (202) is squeezed. When the eccentric end of the eccentric wheel (204) fits with the top of the sealing plate (201), the sealing plate (201) seals the end of the water outlet (104).

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