Air floatation inclined pipe heavy metal stripping system

Abstract

The utility model relates to sewage treatment technical field, the utility model provides a kind of air floatation inclined pipe heavy metal system, including air floatation tank is used to make sewage form supernatant, suspended solids and precipitate under the action of reagent;Dissolved air tank is used to dissolve gas supplied by gas source in water to form dissolved air water, and supply dissolved air water to air floatation tank to make dissolved air water produce bubble and adsorb suspended solids and float;Inclined tube sedimentation tank is communicated with air floatation tank, for receiving supernatant in air floatation tank, inclined tube sedimentation tank is used to make supernatant form supernatant and precipitate under the action of reagent;pH neutralization tank is communicated with inclined tube sedimentation tank, for receiving supernatant in inclined tube sedimentation tank and adjusting the pH value of supernatant to neutral. Through the above technical scheme, the treatment of sewage from preliminary condensation flocculation, air floatation separation, depth precipitation to pH adjustment is realized, heavy metal ions and other pollutants in industrial wastewater are effectively removed, and each index of treated wastewater is guaranteed to reach standard.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an air flotation inclined tube system for removing heavy metals. Background Technology

[0002] Industrial wastewater often contains large amounts of heavy metal ions such as chromium, cadmium, nickel, and lead. Direct discharge can cause significant environmental damage. Therefore, efficient treatment technologies are needed to remove heavy metals to meet environmental emission standards. Dissolved air flotation (DAF) primarily utilizes microbubbles generated by a dissolved air system to adhere to suspended flocs in the water. The suspended solids rise to the surface with the microbubbles, forming scum, thus removing the suspended flocs. Inclined tube sedimentation involves dividing the sedimentation zone into a series of shallow sedimentation layers using inclined parallel tubes. This further reduces the pollutant content of the effluent after DAF, improving the treatment capacity of the sedimentation tank. Current technologies involve adding various chemicals to the wastewater during DAF and inclined tube sedimentation, resulting in a pH level that does not meet the requirements for further processing. Therefore, there is an urgent need for a device that can effectively solve this problem to ensure that the pH of the wastewater treated by DAF and inclined tube sedimentation meets the standards. Utility Model Content

[0003] To overcome the above-mentioned defects, this utility model provides an air flotation inclined tube system for removing heavy metals, which solves the technical problem of pH not meeting the standard after sewage treatment in related technologies.

[0004] According to one aspect, at least one embodiment of the present invention provides a system for removing heavy metals using an air-floating inclined tube, comprising:

[0005] The flotation tank is equipped with a first reagent unit, which is used to form a first supernatant, suspended solids and precipitates in wastewater under the action of the first reagent.

[0006] A dissolved gas tank is used to be connected to a gas source and a water source respectively. The dissolved gas tank is used to dissolve the gas supplied by the gas source in water to form dissolved gas water. The dissolved gas tank has a liquid outlet pipe extending into the flotation tank. The liquid outlet pipe is used to supply dissolved gas water into the flotation tank so that the dissolved gas water generates bubbles and adsorbs suspended solids to float to the surface.

[0007] An inclined tube sedimentation tank is connected to the air flotation tank and is used to receive the first supernatant in the air flotation tank. The inclined tube sedimentation tank is equipped with a second reagent unit. The inclined tube sedimentation tank is used to make the first supernatant form a second supernatant and precipitate under the action of the second reagent.

[0008] A pH neutralization tank, connected to the inclined tube sedimentation tank, is used to receive the second supernatant in the inclined tube sedimentation tank. The pH neutralization tank is used to adjust the pH value of the second supernatant to neutral.

[0009] A stirring assembly, comprising several units, is respectively disposed inside the flotation tank, the inclined tube sedimentation tank, and the pH neutralization tank, for stirring wastewater, the first supernatant, or the second supernatant.

[0010] For example, at least one embodiment of this utility model provides a system for removing heavy metals using an air-floating inclined tube, comprising:

[0011] An equalization tank is used to contain and equalize wastewater, and is connected to the flotation tank via a first pipeline for supplying wastewater to the flotation tank.

[0012] A filling pump tank is installed on the first pipeline, and the filling pump tank is used to stabilize the pressure of sewage in the first pipeline.

[0013] For example, at least one embodiment of this utility model provides a system for removing heavy metals using an air flotation inclined tube. The air flotation tank has multiple overflow plates arranged sequentially, and a receiving cavity is formed between two adjacent overflow plates. The stirring assembly is provided in multiple units, and each unit is located in a corresponding position within the receiving cavity.

[0014] For example, at least one embodiment of this utility model provides a system for removing heavy metals from an inclined tube flotation tank. The flotation tank further includes a scraping assembly. The flotation tank is connected to the inclined tube sedimentation tank through a second pipe. The scraping assembly is located in a receiving cavity near the second pipe. The scraper can move horizontally to scrape off suspended solids in the flotation tank.

[0015] For example, at least one embodiment of this utility model provides a flotation inclined tube system for removing heavy metals, wherein the flotation tank is provided with a slag storage chamber located near the second pipe, and the scraper assembly includes:

[0016] A scraper belt is installed inside the flotation tank;

[0017] Several scrapers are connected to the peripheral wall of the scraping belt and spaced apart along the extension direction of the scraping belt. The scrapers are used to scrape the suspended matter in the flotation tank into the slag storage chamber.

[0018] For example, at least one embodiment of this utility model provides a system for removing heavy metals using an air flotation inclined tube, wherein the second pipe is connected to the dissolved gas tank via a return pipe, and the return pipe is used to supply the first supernatant in the second pipe to the dissolved gas tank.

[0019] For example, at least one embodiment of the present invention provides a flotation inclined tube system for removing heavy metals, which further includes a first sludge tank and a second sludge tank. The first sludge tank is connected to the flotation tank and is used to receive the sediment in the flotation tank and the sludge storage chamber. The second sludge tank is connected to the inclined tube sedimentation tank and is used to receive the sediment in the inclined tube sedimentation tank.

[0020] For example, at least one embodiment of the present invention provides an air flotation inclined tube system for removing heavy metals, wherein the overflow plate adjacent to the scraping assembly has a guide plate, and the guide plate is inclined from bottom to top toward the side closer to the second pipe.

[0021] For example, at least one embodiment of this utility model provides a system for removing heavy metals from an inclined tube flotation tank. The first reagent unit and the second reagent dosing unit each include a plurality of dosing pumps arranged in parallel. The dosing pumps are used to add a first reagent to the flotation tank or add a second reagent to the inclined tube sedimentation tank.

[0022] For example, at least one embodiment of this utility model provides a system for removing heavy metals using an air-floating inclined tube, wherein both the first pipe and the second pipe are provided with bypass pipes, both the first pipe and the second pipe are provided with water pumps, and the bypass pipe is provided with a standby water pump.

[0023] The beneficial effects of the embodiments of this utility model are as follows:

[0024] In this invention, the dissolved air flotation (DAF) tank is equipped with a first reagent unit and a stirring component. The first reagent unit adds reagents to promote the coagulation and flocculation of pollutants, while the stirring component accelerates mixing. Together, they shorten the reaction time and improve the initial removal efficiency of pollutants from wastewater. A dissolved air tank dissolves gas in water to form dissolved air water, which is then transported to the DAF tank through an outlet pipe to generate microbubbles. These microbubbles combine with suspended solids, causing them to float and achieving air flotation separation. This structure, in conjunction with the DAF tank, further enhances the removal of suspended solids. An inclined tube sedimentation tank receives the first supernatant from the DAF tank. A second reagent unit adds reagents for secondary treatment. An internal stirring component ensures uniform mixing of the reagents. The inclined tube structure increases the sedimentation area and shortens the sedimentation time, enabling the inclined tube sedimentation tank to deeply purify the first supernatant and further reduce the pollutant content. A pH neutralization tank receives the second supernatant from the inclined tube sedimentation tank. By adding neutralizing reagents and with the action of the stirring component, the pH value is precisely adjusted to neutral, solving the problem of substandard pH in treated wastewater in existing technologies and ensuring that the treated wastewater meets the requirements of subsequent processing. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0026] Figure 1 This is a schematic diagram of a heavy metal removal system using an air-floating inclined tube according to one embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of the air flotation tank in this utility model.

[0028] In the diagram: 1. Flotation tank; 101. First reagent unit; 102. Overflow plate; 1021. Receiving cavity; 1022. Guide plate; 103. Scraping assembly; 1031. Scraping belt; 1032. Scraper; 104. Slag storage cavity; 2. Dissolved air tank; 201. Discharge pipe; 3. Inclined tube sedimentation tank; 301. Second reagent unit; 4. pH neutralization tank; 5. Stirring assembly; 6. Equalization tank; 7. First pipeline; 8. Filling pump tank; 9. Second pipeline; 901. Return pipe; 10. First sludge tank; 11. Second sludge tank; 12. Dosing pump; 13. Bypass pipeline. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0030] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0031] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] like Figures 1-2As shown, this invention illustrates a heavy metal removal system using an inclined tube flotation apparatus in one embodiment. During operation, wastewater first enters the flotation tank 1. A first reagent unit 101 within the flotation tank 1 adds a first reagent to the wastewater via a dosing pump 12, causing heavy metal ions and other pollutants in the wastewater to coagulate or flocculate, forming a first supernatant, suspended solids, and precipitates. At this time, a stirring assembly 5 located inside the flotation tank 1 begins operation, accelerating the mixing of the first reagent with the wastewater through mechanical stirring, resulting in a more complete coagulation or flocculation reaction and promoting faster formation of suspended solids and precipitates. The dissolved air tank 2 is connected to both an external gas source and a water source. Under pressure, the gas supplied by the gas source dissolves in the water to form dissolved air water. The outlet pipe 201 of the dissolved air tank 2 extends into the flotation tank 1, supplying the dissolved air water to the flotation tank 1. After dissolved air water enters the flotation tank 1, the pressure decreases, and the gas in the dissolved air water is released in the form of microbubbles. The microbubbles adhere to the suspended solids in the flotation tank 1, and under the action of buoyancy, the suspended solids rise to the water surface with the microbubbles, forming scum. The first supernatant after treatment in the flotation tank 1 flows into the inclined tube sedimentation tank 3 through a pipe. The second reagent unit 301 on the inclined tube sedimentation tank 3 adds a second reagent through the dosing pump 12 to further treat the first supernatant, causing the residual pollutants in it to react again to form a second supernatant and precipitates. The stirring component 5 inside the inclined tube sedimentation tank 3 operates to accelerate the mixing of the second reagent and the first supernatant, improving the reaction efficiency. The inclined tube sedimentation tank 3 is equipped with inclined parallel tubes, which divide the tank into a series of shallow sedimentation layers. Under the action of the inclined tube sedimentation, the precipitates in the second supernatant quickly sink, and the second supernatant is purified. The purified second supernatant flows into pH neutralization tank 4. Based on the acidity or alkalinity of the second supernatant, pH neutralization tank 4 adjusts the pH value of the second supernatant to neutral by adding appropriate neutralizing agents and cooperating with the stirring action of the internal stirring component 5.

[0036] The dissolved air flotation (DAF) tank 1 is equipped with a first reagent unit 101 and a stirring component 5. The first reagent unit 101 adds reagents to promote the coagulation and flocculation of pollutants, while the stirring component 5 accelerates mixing. Together, they shorten the reaction time and improve the initial removal efficiency of pollutants from wastewater by the DAF tank 1. The dissolved air tank 2 dissolves gas in water to form dissolved air water, which is then transported to the DAF tank 1 through the outlet pipe 201 to generate microbubbles. These microbubbles combine with suspended solids, causing them to float and achieving air flotation separation. This structure, in conjunction with the DAF tank 1, further enhances the removal effect of suspended solids. The inclined tube sedimentation tank 3 receives the first supernatant from the DAF tank 1. The second reagent unit 301 adds reagents for secondary treatment. The internal stirring component 5 ensures uniform mixing of the reagents. The inclined tube structure increases the sedimentation area and shortens the sedimentation time, enabling the inclined tube sedimentation tank 3 to deeply purify the first supernatant and further reduce the pollutant content. The pH neutralization tank 4 receives the second supernatant from the inclined tube sedimentation tank 3. By adding neutralizing agents and with the action of the stirring component 5, the pH value is precisely adjusted to neutral, solving the problem of substandard pH in treated wastewater in existing technologies, and ensuring that the treated wastewater meets the requirements of subsequent processing. The dissolved air flotation tank 1, dissolved air tank 2, inclined tube sedimentation tank 3, and pH neutralization tank 4 are sequentially connected by a specific interconnection structure. The stirring components 5 in each tank work collaboratively to achieve a complete process of industrial wastewater treatment, from initial coagulation and flocculation, dissolved air flotation separation, deep sedimentation to pH adjustment. The various structures cooperate with each other and progress step by step, effectively removing pollutants such as heavy metal ions from industrial wastewater, ensuring that all indicators of the treated wastewater meet the standards, and improving the efficiency and quality of the entire system in treating industrial wastewater.

[0037] like Figure 1 As shown, the equalization tank 6 serves as a pretreatment stage and is connected to the dissolved air flotation (DAF) tank 1 via the first pipe 7. After entering the equalization tank 6 from its source, wastewater undergoes physical mixing to achieve equalization and homogenization of water quality and quantity, eliminating the impact of fluctuations in wastewater quality and quantity on subsequent treatment stages. A priming pump tank 8 is installed along the first pipe 7 between the equalization tank 6 and the DAF tank 1. When wastewater flows through the first pipe 7, the priming pump tank 8 uses an internal pressure regulating mechanism to stabilize the wastewater pressure, ensuring that the wastewater is delivered to the DAF tank 1 at a constant pressure and stable flow rate.

[0038] The combination of equalization tank 6 and pump tank 8 pre-treats sewage from the source. The equalization tank 6 equalizes the water quality and quantity, and the pump tank 8 stabilizes the delivery pressure and flow rate, providing stable influent conditions for the flotation tank 1. This stabilizes the reaction environment between the reagents and sewage in the flotation tank 1, improves the removal efficiency of heavy metal ions during the flotation stage, and reduces the problem of unstable treatment effect caused by fluctuations in influent.

[0039] like Figure 2As shown, inside the flotation tank 1, multiple overflow plates 102 are arranged in a stepped manner, forming independent receiving chambers 1021 between adjacent overflow plates 102. Each receiving chamber 1021 is equipped with a stirring assembly 5. After the wastewater enters the flotation tank 1, it flows through each receiving chamber 1021 in sequence under the guidance of the overflow plates 102. The stirring assemblies 5 in each chamber operate synchronously. Through the water flow disturbance generated by the rotation of the blades, the first reagent and the wastewater can be fully mixed and reacted in each chamber, gradually enhancing the coagulation or flocculation effect.

[0040] like Figure 2 As shown, a scraping assembly 103 is installed near the second pipe 9, which connects to the inclined tube sedimentation tank 3. The scraping belt 1031 of this assembly surrounds a specific area of ​​the flotation tank 1, and scraper blades 1032 are vertically fixed to the periphery of the scraping belt 1031 and evenly distributed along its extension direction. The scraping belt 1031 circulates under the drive of the drive device, and the scraper blades 1032 move accordingly on the water surface of the flotation tank 1, scraping the floating suspended matter toward the sludge storage chamber 104 located near the second pipe 9.

[0041] like Figure 1 As shown, the second pipeline 9 is connected to the dissolved gas tank 2 through the return pipe 901. Under the control of the pipeline valve, part of the first supernatant is transported to the dissolved gas tank 2 through the return pipe 901. After being mixed with the external water source, dissolved gas water is prepared again, realizing the recycling of water resources.

[0042] In the dissolved air flotation (DAF) tank 1, the overflow plate 102, stirring assembly 5, scraper assembly 103, and guide plate 1022 work together. The multiple receiving chambers 1021 divided by the overflow plate 102 form a graded treatment space. The stirring assembly 5 enhances the mixing of reagents and wastewater at each stage. The scraper assembly 103 and guide plate 1022 promptly remove suspended solids from the water surface, preventing them from redispersing in the water body. This ensures the DAF treatment effect while reducing the treatment load on the inclined tube sedimentation tank 3, thus improving the overall system treatment efficiency. The second pipe 9 is connected to the dissolved air tank 2 via a return pipe 901, enabling the recycling of the first supernatant, reducing external water consumption, lowering the cost of dissolved air water preparation, and alleviating the burden on subsequent wastewater treatment stages.

[0043] like Figure 1 As shown, the inclined tube sedimentation tank 3 is equipped with a sludge discharge pipe at the bottom, which is connected to the second sludge tank 11. The settled sludge is discharged into the second sludge tank 11 through the sludge discharge pipe under the action of gravity. The sludge discharge pipe at the bottom of the dissolved air flotation tank 1 and the discharge pipe of the sludge storage chamber 104 are both connected to the first sludge tank 10. The sediment in the dissolved air flotation tank 1 and the suspended solids in the sludge storage chamber 104 are discharged into the first sludge tank 10 through the pipes, completing the classified collection of sludge after solid-liquid separation. The first sludge tank 10 and the second sludge tank 11 classify and collect sludge generated at different treatment stages, which facilitates the selection of appropriate treatment processes according to the characteristics of the sludge, improves sludge treatment efficiency, and reduces sludge disposal costs.

[0044] like Figure 2 As shown, the top of the overflow plate 102 adjacent to the scraper assembly 103 is provided with a guide plate 1022. The guide plate 1022 is arranged at an angle, and its angle is matched with the running direction of the scraper belt 1031, so as to guide the suspended matter scraped by the scraper 1032 to slide into the slag storage chamber 104.

[0045] like Figure 1 As shown, the parallel dosing pumps 12 of the first chemical dosing unit 101 and the second dosing unit are connected to the dissolved air flotation tank 1 and the inclined tube sedimentation tank 3 via pipelines and control valves. Each dosing pump 12 is equipped with an independent flow regulating device. The control system controls the start-up, shutdown, and flow rate of different dosing pumps 12 based on water quality parameters monitored online, such as heavy metal ion concentration and pH, flexibly adjusting the amount of chemical added. The parallel dosing pumps 12 precisely control the amount of chemical added based on water quality monitoring data, ensuring that the chemical reacts fully with the wastewater to achieve the best treatment effect, while avoiding waste and secondary pollution risks caused by excessive chemical addition.

[0046] like Figure 1 As shown, the bypass pipes 13 installed on the first pipe 7 and the second pipe 9 are connected in parallel with the main pipe. The water pump equipped on the main pipe and the standby water pump on the bypass pipe 13 are linked by the control system. When the main water pump has insufficient flow or malfunction, the control system automatically switches, the standby water pump starts and maintains the transportation of sewage in the system through the bypass pipe 13, ensuring uninterrupted operation of the system.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A system for removing heavy metals using an air-floating inclined tube, characterized in that, include: The flotation tank (1) is equipped with a first reagent unit (101), which is used to make wastewater form a first supernatant, suspended solids and precipitates under the action of the first reagent; Dissolved gas tank (2), the dissolved gas tank (2) is used to be connected to the gas source and the water source respectively, the dissolved gas tank (2) is used to dissolve the gas supplied by the gas source in the water to form dissolved gas water, the dissolved gas tank (2) has an outlet pipe (201) extending into the flotation tank (1), the outlet pipe (201) is used to supply dissolved gas water into the flotation tank (1) so that the dissolved gas water generates bubbles and adsorbs suspended matter to float; Inclined tube sedimentation tank (3) is connected to the flotation tank (1) and is used to receive the first supernatant in the flotation tank (1). The inclined tube sedimentation tank (3) is provided with a second reagent unit (301). The inclined tube sedimentation tank (3) is used to make the first supernatant form a second supernatant and precipitate under the action of the second reagent. pH neutralization tank (4) is connected to the inclined tube sedimentation tank (3) and is used to receive the second supernatant in the inclined tube sedimentation tank (3). The pH neutralization tank (4) is used to adjust the pH value of the second supernatant to neutral. A stirring assembly (5) is provided in several units, which are respectively installed inside the flotation tank (1), the inclined tube sedimentation tank (3) and the pH neutralization tank (4) for stirring sewage, the first supernatant or the second supernatant.

2. The air-floating inclined tube system for removing heavy metals according to claim 1, characterized in that, include: The equalization tank (6) is used to contain and equalize sewage, and is connected to the flotation tank (1) through a first pipe (7) for supplying sewage to the flotation tank (1); A filling pump tank (8) is installed on the first pipeline (7) and is used to stabilize the pressure of the sewage in the first pipeline (7).

3. The air-floating inclined tube system for removing heavy metals according to claim 1, characterized in that, The air flotation tank (1) has multiple overflow plates (102) arranged in sequence, and a receiving cavity (1021) is formed between two adjacent overflow plates (102). The stirring assembly (5) has multiple components, which are located in the receiving cavity (1021) in a one-to-one correspondence.

4. The air-floating inclined tube system for removing heavy metals according to claim 2, characterized in that, The flotation tank (1) also includes a scraping assembly (103). The flotation tank (1) is connected to the inclined tube sedimentation tank (3) through a second pipe (9). The scraping assembly (103) is located in a receiving cavity (1021) near the second pipe (9). The scraping assembly (103) can move horizontally to scrape off suspended matter in the flotation tank (1).

5. The air-floating inclined tube system for removing heavy metals according to claim 4, characterized in that, The flotation tank (1) is provided with a slag storage chamber (104) located near the second pipe (9), and the scraping assembly (103) includes: The scraper belt (1031) is installed inside the flotation tank (1); A plurality of scrapers (1032) are connected to the peripheral wall of the scraping belt (1031) and are spaced apart along the extension direction of the scraping belt (1031). The scrapers (1032) are used to scrape the suspended matter in the flotation tank (1) into the slag storage chamber (104).

6. The air-floating inclined tube system for removing heavy metals according to claim 4, characterized in that, The second pipe (9) is connected to the dissolved gas tank (2) through a return pipe (901), and the return pipe (901) is used to supply the first supernatant in the second pipe (9) to the dissolved gas tank (2).

7. The air-floating inclined tube system for removing heavy metals according to claim 5, characterized in that, It also includes a first sludge tank (10) and a second sludge tank (11). The first sludge tank (10) is connected to the flotation tank (1) and is used to receive the sediment in the flotation tank (1) and the sludge storage chamber (104). The second sludge tank (11) is connected to the inclined tube sedimentation tank (3) and is used to receive the sediment in the inclined tube sedimentation tank (3).

8. The air-floating inclined tube system for removing heavy metals according to claim 1, characterized in that, The overflow plate (102) adjacent to the scraper assembly (103) has a guide plate (1022) that is inclined from bottom to top toward the side closer to the second pipe (9).

9. The air-floating inclined tube system for removing heavy metals according to claim 1, characterized in that, Both the first reagent unit (101) and the second reagent unit (301) include several parallel dosing pumps (12), which are used to add the first reagent to the flotation tank (1) or add the second reagent to the inclined tube sedimentation tank (3).

10. A system for removing heavy metals using an air-floating inclined tube according to claim 4, characterized in that, Both the first pipe (7) and the second pipe (9) are equipped with bypass pipes (13), and both the first pipe (7) and the second pipe (9) are equipped with water pumps. The bypass pipe (13) is equipped with a standby water pump.

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