Sodium saccharin wastewater treatment tank

Abstract

The utility model relates to the field of sodium saccharin production, in particular to a sodium saccharin wastewater treatment pond which comprises a reaction assembly, a precipitation assembly is arranged on one side of the reaction assembly, the reaction assembly comprises a reaction pond, a wastewater connector is formed in the top of one end of the reaction pond, and one side of the wastewater connector communicates with a hydrogen peroxide connector. Flow meters are arranged at the tops of the wastewater connector and the hydrogen peroxide connector, electromagnetic valves are arranged in the wastewater connector and the hydrogen peroxide connector, a first cross beam is fixedly mounted at the top end of the reaction tank, a quantitative feeder is fixedly mounted at the top of one end of the first cross beam, and a hopper is arranged at the top of the quantitative feeder; an aeration pipe is fixedly mounted at the bottom of the inner side of the reaction tank, and an aeration disc is fixedly mounted at the top of the aeration pipe, so that the effects of efficiently treating wastewater generated in the saccharin sodium production process and reducing environmental pollution are achieved.

Description

Technical Field

[0001] The present application relates to the field of sodium saccharin production, and in particular to a sodium saccharin wastewater treatment pool. Background Art

[0002] Saccharin sodium is an artificial sweetener, chemically known as sodium o-sulfonylbenzoylmide. It is approximately 300-500 times sweeter than sucrose but contains no calories. Therefore, it is widely used in the food and beverage industry as a low- or no-calorie sweetener substitute. However, the production of saccharin sodium generates significant amounts of wastewater containing recalcitrant organic matter, which requires treatment before release into the environment.

[0003] The wastewater generated during the existing sodium saccharin production process contains a large amount of organic pollutants. Traditional wastewater pools have low treatment efficiency, are prone to environmental pollution, and are inconvenient to use. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the present application provides a sodium saccharin wastewater treatment pool.

[0005] The above technical objectives of this application are achieved through the following technical solutions:

[0006] A sodium saccharin wastewater treatment tank comprises a reaction component, a precipitation component is provided on one side of the reaction component, the reaction component comprises a reaction tank, a wastewater interface is provided on the top of one end of the reaction tank, a hydrogen peroxide interface is connected to one side of the wastewater interface, flow meters are provided on the top of the wastewater interface and the hydrogen peroxide interface, solenoid valves are provided inside the wastewater interface and the hydrogen peroxide interface, a first crossbeam is fixedly installed on the top of the reaction tank, a quantitative feeder is fixedly installed on the top of one end of the first crossbeam, a hopper is provided on the top of the quantitative feeder, an aeration pipe is fixedly installed on the bottom inside the reaction tank, and an aeration disk is fixedly installed on the top of the aeration pipe.

[0007] By adopting the above scheme, a precipitation component is provided on one side of the reaction component to facilitate the wastewater after chemical reaction treatment to enter the precipitation component for precipitation, a flow meter is provided on the top of the wastewater interface and the hydrogen peroxide interface, and a solenoid valve is provided inside the wastewater interface and the hydrogen peroxide interface to facilitate the connection of external pipes, facilitate the external wastewater and hydrogen peroxide to enter the reaction tank, and can measure and control the wastewater and hydrogen peroxide entering the reaction tank, a quantitative feeder is fixedly installed on the top of one end of the first crossbeam, a hopper is provided on the top of the quantitative feeder to facilitate the storage of ferrous ions inside the hopper, and the quantitative feeder feeds a certain amount of ferrous ions into the reaction tank according to the input amount of wastewater and hydrogen peroxide, an aeration pipe is fixedly installed on the bottom inside the reaction tank, and an aeration disk is fixedly installed on the top of the aeration pipe to facilitate the aeration disk to emit a large number of bubbles to stir the wastewater inside the reaction tank, so that the wastewater can be fully mixed with the hydrogen peroxide and ferrous ions, and increase the oxygen supply to promote the oxidation reaction, thereby efficiently separating the organic pollutants in the wastewater.

[0008] Furthermore, an aeration interface is provided at one end of the aeration pipe, and the aeration interface is arranged outside the reaction tank.

[0009] By adopting the above solution, an aeration interface is provided at one end of the aeration pipe, and the aeration interface is arranged outside the reaction tank, which is convenient for connecting an external air pump and allowing the aeration disk to expose a large amount of air to the inside of the reaction tank.

[0010] Furthermore, a first gear box is fixedly installed at the middle part of the top end of the first beam, and a first motor is fixedly installed inside the first gear box.

[0011] By adopting the above solution, the first motor is fixedly installed inside the first gear box, so that the first gear box can protect the first motor.

[0012] Furthermore, a first worm is fixedly mounted on the output end of the first motor, the first worm is meshedly connected to a first worm wheel, a stirring paddle is fixedly mounted on the bottom of the first worm wheel, and the stirring paddle is arranged inside the reaction tank.

[0013] By adopting the above scheme, a stirring paddle is fixedly installed at the bottom of the first worm gear, and the stirring paddle is arranged inside the reaction tank, so that the first motor works to make the first worm drive the first worm gear to rotate, so that the stirring paddle stirs the wastewater inside the reaction tank, and further fully mixes the wastewater with hydrogen peroxide and ferrous ions.

[0014] Furthermore, the precipitation component includes a precipitation tank, an overflow port is opened on the top of one end of the precipitation tank facing the reaction tank, and a baffle is fixedly installed inside the end of the precipitation tank facing the reaction tank.

[0015] By adopting the above scheme, the overflow port and the baffle are set to facilitate the overflow of the fully stirred wastewater into the sedimentation tank for sedimentation, and the baffle prevents the wastewater entering the sedimentation tank from disturbing the wastewater inside the sedimentation tank.

[0016] Furthermore, an overflow trough is provided at the top of one end of the sedimentation tank away from the reaction tank, and a clear liquid interface is opened at one end of the overflow trough.

[0017] By adopting the above solution, an overflow trough is provided at the top of the sedimentation tank away from the reaction tank, and a clear liquid interface is opened at one end of the overflow trough to facilitate connection to an external pipeline, thereby collecting the supernatant at the top of the sedimentation tank.

[0018] Furthermore, a mud guide slope is provided at the inner bottom of the sedimentation tank, a sewage hole is opened in the middle of the bottom end of the sedimentation tank, and a sewage interface is opened at one end of the bottom of the sedimentation tank, and the sewage interface is connected to the sewage hole.

[0019] By adopting the above scheme, a sewage discharge interface is opened at one end of the bottom of the sedimentation tank, and the sewage discharge interface is connected to the sewage discharge hole, so that the bottom of the sedimentation tank can be circular in structure, which makes it convenient for the scraper to scrape the sediment into the sewage discharge hole, and makes it convenient for external equipment to connect to the sewage discharge interface to extract the sediment sludge inside the sewage discharge hole.

[0020] Furthermore, a second beam is fixedly installed in the middle of the top of the sedimentation tank, a second gear box is fixedly installed in the middle of the second beam, a second motor is fixedly installed inside the second gear box, a second worm is fixedly installed at the output end of the second motor, and the second worm is meshed and connected to the second worm wheel.

[0021] By adopting the above solution, a second worm is fixedly installed at the output end of the second motor, and the meshing connection of the second worm facilitates the second worm wheel, which facilitates the second gear box to protect the internal structure and facilitates the operation of the second motor so that the second worm drives the second worm wheel to rotate.

[0022] Furthermore, a rotating shaft is fixedly installed on the bottom of the second worm gear, a scraper is fixedly installed on the bottom of the rotating shaft, and the bottom of the scraper is in contact with the bottom of the sedimentation tank.

[0023] By adopting the above solution, a scraper is fixedly installed at the bottom of the rotating shaft, and the bottom of the scraper fits with the bottom of the sedimentation tank, so that the second worm gear rotates to drive the scraper to rotate, scraping the precipitated sludge at the bottom of the sedimentation tank into the sewage hole for easy discharge.

[0024] In summary, this application has the following technical effects:

[0025] A precipitation component is provided on one side of the reaction component to facilitate the wastewater after chemical reaction treatment to enter the precipitation component for precipitation. Flow meters are provided on the tops of the wastewater interface and the hydrogen peroxide interface. Solenoid valves are provided inside the wastewater interface and the hydrogen peroxide interface to facilitate the connection of external pipes, facilitate the entry of external wastewater and hydrogen peroxide into the reaction tank, and can measure and control the wastewater and hydrogen peroxide entering the reaction tank. A quantitative feeder is fixedly installed on the top of one end of the first crossbeam. A hopper is provided on the top of the quantitative feeder to facilitate the storage of ferrous ions inside the hopper. The quantitative feeder feeds a certain amount of ferrous ions into the reaction tank according to the input amount of wastewater and hydrogen peroxide. An aeration pipe is fixedly installed on the bottom inside the reaction tank, and an aeration disk is fixedly installed on the top of the aeration pipe to facilitate the aeration disk to emit a large number of bubbles to stir the wastewater inside the reaction tank, so that the wastewater can be fully mixed with the hydrogen peroxide and ferrous ions, and increase the oxygen supply to promote the oxidation reaction, thereby efficiently separating the organic pollutants in the wastewater, achieving the effect of efficiently treating the wastewater generated in the sodium saccharin production process and reducing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the appearance structure diagram of this application;

[0027] Figure 2 is a cross-sectional view of the present application;

[0028] Figure 3 This is a three-dimensional structural diagram of the stirring paddle of the present application;

[0029] Figure 4 It is a three-dimensional structural diagram of the aeration tube of this application;

[0030] Figure 5 It is a structural diagram of the scraper of this application.

[0031] In the figure, 101, reaction component; 10101, reaction tank; 10102, wastewater interface; 10103, hydrogen peroxide interface; 10104, flow meter; 10105, first crossbeam; 10106, quantitative feeder; 10107, hopper; 10108, first gearbox; 10109, first motor; 10110, first worm; 10111, first worm gear; 10112, stirring paddle; 10113, aeration interface; 10114, aeration pipe; 10115, Aeration plate; 102, sedimentation assembly; 10201, sedimentation tank; 10202, overflow trough; 10203, clear liquid interface; 10204, second crossbeam; 10205, second gearbox; 10206, overflow port; 10207, baffle; 10208, mud guide slope; 10209, sewage hole; 10210, sewage interface; 10211, second motor; 10212, second worm; 10213, second worm wheel; 10214, rotating shaft; 10215, scraper. DETAILED DESCRIPTION

[0032] The present application is further described in detail below with reference to the accompanying drawings.

[0033] Example:

[0034] As attached Figure 1 To the attached Figure 5 As shown:

[0035] The utility model provides a sodium saccharin wastewater treatment pool, including a reaction component 101, a precipitation component 102 is provided on one side of the reaction component 101, and the precipitation component 102 is provided on one side of the reaction component 101, so that wastewater after chemical reaction treatment can enter the precipitation component 102 for precipitation. The reaction component 101 includes a reaction tank 10101, a wastewater interface 10102 is provided on the top of one end of the reaction tank 10101, and a hydrogen peroxide interface 10103 is connected to the wastewater interface 10102. A flow meter 10104 is provided on the top, and a solenoid valve is provided inside the wastewater interface 10102 and the hydrogen peroxide interface 10103. The flow meter 10104 is provided on the top of the wastewater interface 10102 and the hydrogen peroxide interface 10103, and a solenoid valve is provided inside the wastewater interface 10102 and the hydrogen peroxide interface 10103, which is convenient for connecting external pipes, facilitating external wastewater and hydrogen peroxide to enter the reaction tank 10101, and can measure and control the wastewater and hydrogen peroxide entering the reaction tank 10101. The first horizontal Beam 10105, a quantitative feeder 10106 is fixedly installed on the top of one end of the first crossbeam 10105, and a hopper 10107 is provided on the top of the quantitative feeder 10106. A quantitative feeder 10106 is fixedly installed on the top of one end of the first crossbeam 10105, and a hopper 10107 is provided on the top of the quantitative feeder 10106, so that ferrous ions can be stored inside the hopper 10107. The quantitative feeder 10106 feeds a certain amount of ferrous ions into the reaction tank 10101 according to the amount of wastewater and hydrogen peroxide input. The inside of the reaction tank 10101 An aeration pipe 10114 is fixedly installed at the bottom, and an aeration plate 10115 is fixedly installed on the top of the aeration pipe 10114. The aeration pipe 10114 is fixedly installed at the bottom of the inner side of the reaction tank 10101, and the aeration plate 10115 is fixedly installed on the top of the aeration pipe 10114. The aeration plate 10115 can emit a large number of bubbles to stir the wastewater inside the reaction tank 10101, so that the wastewater can be fully mixed with hydrogen peroxide and ferrous ions, and the increased oxygen supply can promote the oxidation reaction, thereby efficiently decomposing organic pollutants in the wastewater.

[0036] Among them, an aeration interface 10113 is provided at one end of the aeration pipe 10114, and the aeration interface 10113 is arranged on the outside of the reaction tank 10101. The aeration interface 10113 is provided at one end of the aeration pipe 10114, and the aeration interface 10113 is arranged on the outside of the reaction tank 10101, which is convenient for connecting an external air pump and allowing the aeration plate 10115 to expose a large amount of air to the inside of the reaction tank 10101.

[0037] Among them, a first gear box 10108 is fixedly installed in the middle of the top of the first beam 10105, and a first motor 10109 is fixedly installed inside the first gear box 10108. The first motor 10109 is fixedly installed inside the first gear box 10108, so that the first gear box 10108 can protect the first motor 10109.

[0038] Among them, the output end of the first motor 10109 is fixedly installed with a first worm 10110, the first worm 10110 is meshedly connected with the first worm gear 10111, and a stirring paddle 10112 is fixedly installed at the bottom of the first worm gear 10111. The stirring paddle 10112 is arranged inside the reaction tank 10101. The stirring paddle 10112 is fixedly installed at the bottom of the first worm gear 10111, and the stirring paddle 10112 is arranged inside the reaction tank 10101, so that the first motor 10109 works to make the first worm 10110 drive the first worm gear 10111 to rotate, so that the stirring paddle 10112 stirs the wastewater inside the reaction tank 10101, and further fully mixes the wastewater with hydrogen peroxide and ferrous ions.

[0039] Among them, the sedimentation component 102 includes a sedimentation tank 10201, and an overflow port 10206 is opened at the top of one end of the sedimentation tank 10201 facing the reaction tank 10101. A baffle 10207 is fixedly installed inside the one end of the sedimentation tank 10201 facing the reaction tank 10101. The setting of the overflow port 10206 and the baffle 10207 facilitates the overflow of the wastewater that has been fully stirred and evenly mixed into the sedimentation tank 10201 for sedimentation. The baffle 10207 prevents the wastewater entering the sedimentation tank 10201 from disturbing the wastewater inside the sedimentation tank 10201.

[0040] Among them, an overflow trough 10202 is provided at the top of the sedimentation tank 10201 away from the reaction tank 10101, and a clear liquid interface 10203 is opened at one end of the overflow trough 10202. The overflow trough 10202 is provided at the top of the sedimentation tank 10201 away from the reaction tank 10101, and a clear liquid interface 10203 is opened at one end of the overflow trough 10202, which is convenient for connecting external pipelines to collect the supernatant at the top of the sedimentation tank 10201.

[0041] Among them, a mud guide slope 10208 is provided at the bottom inner side of the sedimentation tank 10201, a sewage hole 10209 is opened in the middle of the bottom end of the sedimentation tank 10201, and a sewage interface 10210 is opened at one end of the bottom of the sedimentation tank 10201, and the sewage interface 10210 is connected with the sewage hole 10209. The sewage interface 10210 is opened at one end of the bottom of the sedimentation tank 10201, and the sewage interface 10210 is connected with the sewage hole 10209, so that the bottom of the sedimentation tank 10201 can be circular in structure, which is convenient for the scraper 10215 to scrape the sediment into the sewage hole 10209, and it is convenient for external equipment to connect the sewage interface 10210 to extract the settled sludge inside the sewage hole 10209.

[0042] Among them, a second crossbeam 10204 is fixedly installed in the middle of the top of the sedimentation tank 10201, a second gear box 10205 is fixedly installed in the middle of the second crossbeam 10204, a second motor 10211 is fixedly installed inside the second gear box 10205, a second worm 10212 is fixedly installed at the output end of the second motor 10211, and the second worm 10212 is meshed and connected to facilitate the second worm wheel 10213. The second worm 10212 is fixedly installed through the output end of the second motor 10211, and the second worm 10212 is meshed and connected to facilitate the second worm wheel 10213, which is convenient for the second gear box 10205 to protect the internal structure and facilitate the operation of the second motor 10211 to make the second worm 10212 drive the second worm wheel 10213 to rotate.

[0043] Among them, a rotating shaft 10214 is fixedly installed at the bottom of the second worm gear 10213, and a scraper 10215 is fixedly installed at the bottom of the rotating shaft 10214. The bottom of the scraper 10215 is in contact with the bottom of the sedimentation tank 10201. The scraper 10215 is fixedly installed at the bottom of the rotating shaft 10214, and the bottom of the scraper 10215 is in contact with the bottom of the sedimentation tank 10201, so that the second worm gear 10213 can rotate to make the rotating shaft 10214 drive the scraper 10215 to rotate, and scrape the settled sludge at the bottom of the sedimentation tank 10201 into the sewage hole 10209 for easy discharge.

[0044] Specifically, a precipitation component 102 is provided on one side of the reaction component 101, so that the wastewater after chemical reaction treatment can enter the precipitation component 102 for precipitation. A flow meter 10104 is provided on the top of the wastewater interface 10102 and the hydrogen peroxide interface 10103. Solenoid valves are provided inside the wastewater interface 10102 and the hydrogen peroxide interface 10103 to facilitate the connection of external pipes, so that external wastewater and hydrogen peroxide can enter the reaction tank 10101, and the wastewater and hydrogen peroxide entering the reaction tank 10101 can be measured and controlled. A quantitative feeder 10106 is fixedly installed on the top of one end of the first crossbeam 10105, and a hopper 10107 is provided on the top of the quantitative feeder 10106 to facilitate the storage of the hopper 10107. Ferrous ions, a quantitative feeder 10106 feeds a certain amount of ferrous ions into the reaction tank 10101 according to the input amount of wastewater and hydrogen peroxide, an aeration interface 10113 is provided at one end of the aeration pipe 10114, and the aeration interface 10113 is arranged on the outside of the reaction tank 10101, which is convenient for connecting an external air pump, so that the aeration plate 10115 can expose a large amount of air to the inside of the reaction tank 10101, and an aeration pipe 10114 is fixedly installed at the bottom of the inner side of the reaction tank 10101, and an aeration plate 10115 is fixedly installed on the top of the aeration pipe 10114, so that the aeration plate 10115 can expose a large amount of bubbles to stir the wastewater in the reaction tank 10101, so that the wastewater can be fully mixed with the hydrogen peroxide and ferrous ions, and Increasing the oxygen supply can promote the oxidation reaction, thereby being able to efficiently separate the organic pollutants in the wastewater. A first motor 10109 is fixedly installed inside the first gear box 10108, so that the first gear box 10108 can protect the first motor 10109. A stirring paddle 10112 is fixedly installed at the bottom of the first worm gear 10111. The stirring paddle 10112 is arranged inside the reaction tank 10101, so that the first motor 10109 can work to make the first worm 10110 drive the first worm gear 10111 to rotate, so that the stirring paddle 10112 stirs the wastewater inside the reaction tank 10101, further making the wastewater fully mixed with hydrogen peroxide and ferrous ions, and the wastewater is discharged through the overflow port 10206 and the flow barrier. The setting of plate 10207 facilitates the overflow of the fully stirred wastewater into the sedimentation tank 10201 for sedimentation. The baffle 10207 prevents the wastewater entering the sedimentation tank 10201 from disturbing the wastewater inside the sedimentation tank 10201. A second worm 10212 is fixedly installed on the output end of the second motor 10211. The meshing connection of the second worm 10212 facilitates the second worm gear 10213, which facilitates the second gear box 10205 to protect the internal structure and facilitates the operation of the second motor 10211 to drive the second worm gear 10213 to rotate. A scraper 10215 is fixedly installed on the bottom of the rotating shaft 10214, and the bottom of the scraper 10215 is in contact with the bottom of the sedimentation tank 10201.The second worm gear 10213 rotates to make the rotating shaft 10214 drive the scraper 10215 to rotate, scraping the precipitated sludge at the bottom of the sedimentation tank 10201 into the drain hole 10209 for easy discharge. A drain interface 10210 is provided at one end of the bottom of the sedimentation tank 10201. The drain interface 10210 is connected to the drain hole 10209, making it convenient for the bottom of the sedimentation tank 10201 to have a circular structure, making it convenient for the scraper 10215 to scrape the sediment into the drain hole 10209, and convenient for external equipment to connect the drain interface 10210 to extract the precipitated sludge inside the drain hole 10209. An overflow trough 10202 is provided at the top of the end of the sedimentation tank 10201 away from the reaction tank 10101. A clear liquid interface 10203 is provided at one end of the overflow trough 10202 for easy connection to an external pipeline, thereby collecting the supernatant at the top of the sedimentation tank 10201.

[0045] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A sodium saccharin wastewater treatment pool, characterized in that: The invention comprises a reaction component (101), wherein a precipitation component (102) is provided on one side of the reaction component (101), wherein the reaction component (101) comprises a reaction tank (10101), wherein a wastewater interface (10102) is provided on the top of one end of the reaction tank (10101), wherein one side of the wastewater interface (10102) is connected to a hydrogen peroxide interface (10103), wherein flow meters (10104) are provided on the tops of the wastewater interface (10102) and the hydrogen peroxide interface (10103), wherein the wastewater interface (10102) is connected to ... A solenoid valve is provided inside the hydrogen peroxide interface (10103), a first crossbeam (10105) is fixedly installed on the top of the reaction tank (10101), a quantitative feeder (10106) is fixedly installed on the top of one end of the first crossbeam (10105), a hopper (10107) is provided on the top of the quantitative feeder (10106), an aeration pipe (10114) is fixedly installed on the bottom inside the reaction tank (10101), and an aeration disk (10115) is fixedly installed on the top of the aeration pipe (10114).

2. A saccharin sodium wastewater treatment pool according to claim 1, characterized in that: An aeration interface (10113) is provided at one end of the aeration pipe (10114), and the aeration interface (10113) is arranged outside the reaction tank (10101).

3. A saccharin sodium wastewater treatment pool according to claim 1, characterized in that: A first gear box (10108) is fixedly mounted on the middle portion of the top end of the first crossbeam (10105), and a first motor (10109) is fixedly mounted inside the first gear box (10108).

4. A saccharin sodium wastewater treatment pool according to claim 3, characterized in that: A first worm (10110) is fixedly mounted on the output end of the first motor (10109), the first worm (10110) is meshingly connected to a first worm gear (10111), a stirring paddle (10112) is fixedly mounted on the bottom of the first worm gear (10111), and the stirring paddle (10112) is arranged inside the reaction tank (10101).

5. A saccharin sodium wastewater treatment pool according to claim 1, characterized in that: The precipitation assembly (102) comprises a precipitation tank (10201), an overflow port (10206) is provided on the top of one end of the precipitation tank (10201) facing the reaction tank (10101), and a baffle (10207) is fixedly installed inside the end of the precipitation tank (10201) facing the reaction tank (10101).

6. A saccharin sodium wastewater treatment pool according to claim 5, characterized in that: An overflow trough (10202) is provided at the top of one end of the sedimentation tank (10201) away from the reaction tank (10101), and a clear liquid interface (10203) is provided at one end of the overflow trough (10202).

7. A saccharin sodium wastewater treatment pool according to claim 6, characterized in that: A mud guide slope (10208) is provided at the inner bottom of the sedimentation tank (10201), a sewage discharge hole (10209) is provided in the middle of the bottom end of the sedimentation tank (10201), and a sewage discharge interface (10210) is provided at one end of the bottom end of the sedimentation tank (10201), and the sewage discharge interface (10210) is connected to the sewage discharge hole (10209).

8. A saccharin sodium wastewater treatment pool according to claim 7, characterized in that: A second crossbeam (10204) is fixedly mounted in the middle of the top of the sedimentation tank (10201), a second gearbox (10205) is fixedly mounted in the middle of the second crossbeam (10204), a second motor (10211) is fixedly mounted inside the second gearbox (10205), a second worm (10212) is fixedly mounted at the output end of the second motor (10211), and the second worm (10212) is meshedly connected to the second worm wheel (10213).

9. A saccharin sodium wastewater treatment pool according to claim 8, characterized in that: A rotating shaft (10214) is fixedly mounted on the bottom of the second worm gear (10213), a scraper (10215) is fixedly mounted on the bottom of the rotating shaft (10214), and the bottom of the scraper (10215) is in contact with the bottom of the sedimentation tank (10201).

Images