Industrial wastewater treatment system based on refined dosing of chemicals

Abstract

The invention relates to the field of wastewater treatment, in particular to an industrial wastewater treatment system based on refined dosing of chemicals, which comprises a flotation bin, a central bin, a water inlet assembly and a flotation assembly, the central bin is mounted in the center of the flotation bin; the water inlet assembly can circularly move around the center of the flotation bin and is used for introducing wastewater into the flotation bin; a flotation tank is installed outside the center bin, the flotation assembly comprises an ejector rod and a row brush which are both rotationally installed outside the water inlet assembly, and the ejector rod and the row brush are linked through a linkage unit to rotate in the opposite directions. Through linkage between the ejector rod and the row brush, the row brush can reversely swing to be attached to the front side of the flotation tank after crossing the flotation tank and then move along with the water inlet assembly, the back face of the row brush can be cleaned, and floating foam at the dead angle position of the front side of the flotation tank can be taken away when the water inlet assembly drives the row brush to continue to move; and the floating foam cleaning effect is further improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more specifically to an industrial wastewater treatment system based on precise dosing of reagents. Background Technology

[0002] Industrial wastewater treatment is an indispensable part of industrial production. Among the various methods, air flotation (or flotation) is widely used due to its high efficiency in separating suspended solids, oils, and some dissolved substances. The core of this technology lies in generating a large number of microbubbles through aeration. These microbubbles adhere to the "floc" (i.e., flocs) formed in the wastewater by the action of coagulants, creating a scum with a density less than water that floats to the surface. This scum is then removed by a scraping or spreading device, thus achieving solid-liquid or liquid-liquid separation and purifying the water.

[0003] The dosage of the flocculant is crucial. Insufficient dosage leads to incomplete flocculation, resulting in small, loose flocs with poor binding ability to air bubbles, resulting in poor flotation. Excessive dosage not only wastes the flocs and increases treatment costs, but can also damage floc stability, generate excess sludge, and even adversely affect subsequent treatment units. Current flocculant dosing processes rely heavily on automated control technology and advanced detection methods to achieve precise dosing, maximizing treatment effectiveness and minimizing operating costs. Furthermore, timely and effective treatment of scum is essential to prevent its decomposition and redissolution in the water. In the flotation separation stage, traditional skimming mechanisms typically use brushes to push scum onto the surface and transport it to a scum collection tank. While simple, this method creates blind spots, preventing timely collection of scum and impacting wastewater treatment efficiency. Summary of the Invention

[0004] This invention provides an industrial wastewater treatment system based on precise reagent dosing to solve the problem of poor foam removal effect in the flotation separation stage of wastewater treatment.

[0005] The industrial wastewater treatment system based on precise reagent dosing of the present invention adopts the following technical solution: it includes a flotation chamber, a central chamber, an inlet assembly, and a flotation assembly; the flotation chamber is a cylindrical chamber with a sealed bottom and an open top; the central chamber is installed at the center of the flotation chamber; the inlet assembly includes a first water pipe and a second water pipe both along the radial direction of the flotation chamber, the first water pipe being located above the liquid surface inside the flotation chamber, used to receive wastewater and capable of moving around the central circumference of the flotation chamber; the second water pipe is fixed below the first water pipe and communicates with the first water pipe, used to introduce wastewater into the flotation chamber; a flotation cell is installed outside the central chamber, the upper end of the flotation cell being open and higher than the liquid surface inside the flotation chamber but lower than the first water pipe, and the flotation cell is radially inclined relative to the flotation chamber. The flotation unit is configured with a gap between itself and the inner wall of the flotation tank. Along the rotation direction of the first water pipe, the end of the flotation cell connected to the central tank is located in front of the end furthest from the central tank. The flotation assembly includes a top rod and a brush, both rotatably mounted outside the first water pipe. Both the top rod and the brush are located below the axis of the first water pipe and are linked by a linkage unit to rotate in opposite directions. A torsion spring connects the top rod to the first water pipe, causing the top rod to be positioned in front of the brush along the rotation direction of the first water pipe. When the first water pipe rotates above the flotation cell, the top rod abuts against the flotation cell, causing the torsion spring to store force. When the first water pipe moves away from the flotation cell, the torsion spring resets the top rod, causing the rear side of the brush to adhere to the side wall of the flotation cell before moving with the first water pipe.

[0006] Optionally, the central chamber is provided with an inlet chamber, a clear water chamber, and a froth chamber that are isolated from each other; the inlet chamber is connected to the first water pipe, and the froth chamber is connected to the flotation cell; a clear water pipe is provided outside the central chamber to connect the clear water chamber and the liquid inside the flotation cell, and the clear water pipe is fixedly connected to the first water pipe or the second water pipe.

[0007] Optionally, the clean water pipe is located in front of the second water pipe along the rotation direction of the first water pipe.

[0008] Optionally, the clear water pipe extends radially along the flotation chamber; along the rotation direction of the first water pipe, an inlet is provided on the front side of the clear water pipe, and an outlet is provided on the rear side of the second water pipe.

[0009] Optionally, an annular track coaxial with the flotation chamber is provided at the upper end of the flotation chamber, and a roller is rotatably installed at the end of the first water pipe away from the center of the flotation chamber. The roller rolls along the annular track under the drive of a motor installed on the first water pipe.

[0010] Optionally, the central chamber includes an inner cylinder, a middle cylinder, and an outer cylinder arranged sequentially from the inside out. The lower end of the inner cylinder is rotatably mounted on the flotation chamber and connected to an external water inlet pipe. The upper end of the inner cylinder is connected to a first water pipe. The inner cylinder contains the water inlet chamber. The froth chamber is defined between the inner cylinder and the middle cylinder, and the clear water chamber is defined between the middle cylinder and the outer cylinder. The clear water chamber is connected to an external water outlet pipe. The outer cylinder is a split structure consisting of an upper cylinder and a lower cylinder. The upper end of the upper cylinder is fixed to the middle cylinder, and the lower cylinder is connected to the clear water pipe and can rotate relative to the upper cylinder. The flotation cell passes through the upper cylinder and the middle cylinder and then connects to the froth chamber.

[0011] Optionally, the linkage unit includes a first rotating ring, a second rotating ring, and a transmission wheel. Both the first and second rotating rings are rotatably sleeved on the outside of the first water pipe, and the first rotating ring is connected to the top rod, while the second rotating ring is connected to the brush. The torsion spring connects the first rotating ring and the first water pipe. The transmission wheel is rotatably mounted on the first water pipe, and its axis is along the radial direction of the first water pipe. The transmission wheel is located between the first and second rotating rings and abuts against the first and second rotating rings.

[0012] Optionally, there are multiple push rods and brushes, which are arranged alternately along the axial direction of the first water pipe, and there are multiple corresponding linkage units; the multiple push rods are connected by crossbars, so that the multiple push rods rotate synchronously.

[0013] Optionally, a stop bar is provided on the flotation cell. The stop bar is used to abut against the crossbar to prevent the push rod from rotating and resetting when it moves above the flotation cell, so that the push rod resets after passing the flotation cell.

[0014] Optionally, the bottom of the flotation cell is positioned so that the end furthest from the central chamber is higher than the end closest to the central chamber.

[0015] The beneficial effects of the present invention are as follows: The industrial wastewater treatment system based on precise reagent dosing of the present invention sets the flotation cell radially inclined relative to the flotation chamber, and sets the end of the flotation cell connected to the central chamber to be located in front of the end away from the central chamber. When the first water pipe rotates, the end of the first water pipe away from the central chamber will approach the flotation cell before the other end. When the brush sends the foam to the flotation cell, the amount of foam passing through the gap can be effectively reduced.

[0016] Furthermore, by utilizing the linkage between the push rod and the brush, the brush can swing in the opposite direction after passing the flotation cell until it is in contact with the front side of the flotation cell, and then move with the first water pipe. This not only cleans the back of the brush, but also removes the foam from the dead corners at the front of the flotation cell as the first water pipe moves the brush, further improving the foam cleaning effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the industrial wastewater treatment system based on precise dosing of reagents according to the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view of point B in the middle; Figure 4 for Figure 1 Top view; Figure 5 for Figure 4 Enlarged view of point C in the middle; Figure 6 This is a partial top view of an embodiment of the industrial wastewater treatment system based on precise dosing of reagents according to the present invention; Figure 7 for Figure 6 Schematic diagram of cross section along the EE direction; Figure 8 for Figure 6 Schematic diagram of cross section in the DD direction; Figure 9 for Figure 8 Enlarged view of point F in the middle; Figure 10 The states of the flotation components and flotation cells in an embodiment of the industrial wastewater treatment system based on precise reagent dosing of the present invention are shown below. Figure 2 ; Figure 11 The states of the flotation components and flotation cells in an embodiment of the industrial wastewater treatment system based on precise reagent dosing of the present invention are shown below. Figure 3 ; Figure 12 The states of the flotation components and flotation cells in an embodiment of the industrial wastewater treatment system based on precise reagent dosing of the present invention are shown below. Figure 4 ; Figure 13 The states of the flotation components and flotation cells in an embodiment of the industrial wastewater treatment system based on precise reagent dosing of the present invention are shown below. Figure 5 ; Figure 14 This is a schematic diagram of the flotation component in an embodiment of the industrial wastewater treatment system based on precise reagent dosing of the present invention.

[0019] In the diagram: 100, flotation chamber; 110, circular track; 200, central chamber; 201, inner cylinder; 202, intermediate cylinder; 203, outer cylinder; 204, inlet pipe; 205, outlet pipe; 206, collection pipe; 210, inlet chamber; 220, clear water chamber; 230, froth chamber; 240, flotation cell; 241, baffle; 250, clear water pipe; 310, first water pipe; 311, roller; 312, motor; 320, second water pipe; 400, flotation assembly; 410, top rod; 420, brush; 430, first rotating ring; 440, second rotating ring; 450, drive wheel; 460, crossbar. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Examples of the industrial wastewater treatment system based on precise dosing of reagents according to the present invention, such as... Figures 1 to 14 As shown, it includes a flotation chamber 100, a central chamber 200, an inlet water assembly, and a flotation assembly 400.

[0022] Flotation chamber 100 is a cylindrical chamber with a sealed bottom and an open top; central chamber 200 is installed in the center of flotation chamber 100. Between the inner wall and bottom of central chamber 200 and flotation chamber 100 is a flotation pool for wastewater treatment.

[0023] The water inlet assembly includes a first water pipe 310 and a second water pipe 320, both extending radially along the flotation chamber 100. The first water pipe 310 is located above the liquid surface within the flotation chamber 100, serving to receive wastewater and capable of circumferential movement around the center of the flotation chamber 100. The second water pipe 320 is fixed below the first water pipe 310 and communicates with it, for introducing wastewater into the flotation chamber 100. The second water pipe 320 introduces wastewater from below the liquid surface, minimizing disturbance to the water flow within the flotation chamber 100 and preventing disruption of any foam formed on the liquid surface. The ends of the first water pipe 310 and the second water pipe 320 furthest from the center of the flotation chamber 100 are connected and interconnected via a vertically arranged connecting pipe.

[0024] A flotation cell 240 is installed outside the central chamber 200. The upper end of the flotation cell 240 is open and is higher than the liquid level inside the flotation chamber 100 but lower than the first water pipe 310. The flotation cell 240 is radially inclined relative to the flotation chamber 100 and has a gap reserved between it and the inner wall of the flotation chamber 100 to allow the connecting pipe between the first water pipe 310 and the second water pipe 320 to pass through. Along the rotation direction of the first water pipe 310, the end of the flotation cell 240 connected to the central chamber 200 is located in front of the end away from the central chamber 200.

[0025] The flotation assembly 400 includes a push rod 410 rotatably mounted outside the first water pipe 310 and a flexible brush 420. Both the push rod 410 and the brush 420 are located below the axis of the first water pipe 310 and are linked by a linkage unit to rotate in opposite directions. A torsion spring (not shown in the figure) connects the push rod 410 and the first water pipe 310, causing the push rod 410 to be positioned in front of the brush 420 along the rotation direction of the first water pipe 310. When the first water pipe 310 rotates above the flotation cell 240, the push rod 410 abuts against the flotation cell 240, causing the torsion spring to store force. When the first water pipe 310 moves away from the flotation cell 240, the torsion spring resets the push rod 410, causing the rear side of the brush 420 to adhere to the side wall of the flotation cell 240 before moving with the first water pipe 310.

[0026] The industrial wastewater treatment system based on precise reagent dosing of the present invention further includes a tubular accumulator installed upstream of the flotation chamber 100 and an aeration device (not shown in the figures) installed on the inner wall of the flotation chamber 100. The tubular accumulator receives wastewater and coagulant, mixes them thoroughly, and then injects them into the flotation chamber 100 through the first water pipe 310 and the second water pipe 320. The tubular accumulator can adjust the injection amount of coagulant according to the amount of coagulation in the wastewater to achieve precise dosing. The aeration device can be configured as needed to introduce gas into the flotation chamber 100 to promote the rise of foam in the wastewater.

[0027] Wastewater enters the flotation tank within the flotation chamber 100 through the first water pipe 310 and the second water pipe 320. Some impurities in the wastewater mix with the coagulant and settle to the bottom of the flotation chamber 100. Gases, microorganisms, organic matter, and inorganic matter react with the coagulant and aggregate to form foam that floats on the liquid surface. The first water pipe 310 rotates, and the second water pipe 320 introduces wastewater into the flotation chamber 100. By ensuring that the flow velocity of the wastewater entering the flotation chamber 100 is the same as the rotation speed of the first water pipe 310 but in the opposite direction, the wastewater in the flotation chamber 100 can be kept still, minimizing water flow disturbance. As the flotation assembly 400 rotates with the first water pipe 310, the brush 420 pushes the foam on the liquid surface, and when it reaches the flotation cell 240, it pushes the foam into the flotation cell 240. Some foam passes through the gap between the flotation cell 240 and the inner wall of the flotation chamber 100. By setting the flotation cell 240 radially inclined relative to the flotation chamber 100, and positioning the end of the flotation cell 240 connected to the central chamber 200 in front of the end away from the central chamber 200, when the first water pipe 310 rotates, the end of the first water pipe 310 away from the central chamber 200 will approach the flotation cell 240 before the other end. When the brush 420 sends the foam to the flotation cell 240, the amount of foam passing through the gap can be effectively reduced.

[0028] Furthermore, when the first water pipe 310 rotates to above the flotation cell 240, the push rod 410 will abut against the rear side of the flotation cell 240 and be restricted from moving. The first water pipe 310 continues to move, driving the brush 420 to move past the push rod 410 to send the foam to the flotation cell 240. At the same time, the rotation of the push rod 410 relative to the first water pipe 310 can also cause the brush 420 to rotate relative to the first water pipe 310 to send the foam to the flotation cell 240, and the torsion spring stores energy. When the first water pipe 310 moves away from the flotation cell 240, the push rod 410 gradually disengages from the rear side of the flotation cell 240 and moves along the upper side of the flotation cell 240 to the front side of the flotation cell 240. Then, under the action of the torsion spring, the push rod 410 swings forward relative to the axis of the first water pipe 310, causing the brush 420 to swing backward and fit against the front side of the flotation cell 240. This not only cleans the back of the brush 420, but also removes the foam in the dead corner of the front side of the flotation cell 240 when the first water pipe 310 drives the brush 420 to continue moving, further improving the foam cleaning effect.

[0029] Because the brush 420 is made of flexible material, it is usually squeezed and deformed by the flotation cell 240 when passing through it. After passing the flotation cell 240, it will form a dead corner that cannot be swept in front of the flotation cell 240. By using the linkage between the push rod 410 and the brush 420, the brush 420 will swing backward after passing through the flotation cell 240, and come into contact with the front of the flotation cell 240, which can remove the foam in the dead corner. The front and rear sides are determined based on the rotation direction of the first water pipe 310. That is, when the first water pipe 310 rotates, the water-facing side of the brush 420 is the front side, and the water-repelling side is the rear side.

[0030] In this embodiment, the central chamber 200 is provided with mutually isolated water inlet chamber 210, clear water chamber 220, and froth chamber 230; the water inlet chamber 210 is connected to the first water pipe 310, and the froth chamber 230 is connected to the flotation cell 240; a clear water pipe 250 is provided outside the central chamber 200, connecting the clear water chamber 220 and the liquid inside the flotation cell 100, and the clear water pipe 250 is fixedly connected to the first water pipe 310 or the second water pipe 320. When the clear water pipe 250 rotates with the first water pipe 310, it delivers the clear water in the middle section of the flotation cell to the clear water chamber 220. Multiple clear water pipes 250 can be provided, each connected to an arc-shaped rod extending from the end of the first water pipe 310 away from the central chamber 200 via a vertical connecting rod. Both the vertical connecting rod and the arc-shaped rod can pass through the gap between the flotation cell 240 and the inner wall of the flotation cell 100.

[0031] In this embodiment, along the rotation direction of the first water pipe 310, the clean water pipe 250 is located in front of the second water pipe 320. In this way, when the first water pipe 310 rotates, the clean water pipe 250 first recovers the clean water in the middle section after stratification, and then the second water pipe 320 introduces new wastewater behind the clean water pipe 250. The wastewater introduced by the second water pipe 320 will not affect the recovery of the clean water pipe 250.

[0032] In this embodiment, the clear water pipe 250 extends radially along the flotation chamber 100; along the rotation direction of the first water pipe 310, the clear water pipe 250 has an inlet on its front side and the second water pipe 320 has an outlet on its rear side.

[0033] In this embodiment, an annular track 110 coaxial with the flotation chamber 100 is provided at the upper end of the flotation chamber 100, and a roller 311 is rotatably installed at the end of the first water pipe 310 away from the center of the flotation chamber 100. The roller 311 rolls along the annular track 110 under the drive of the motor 312 installed on the first water pipe 310.

[0034] In this embodiment, the central chamber 200 includes an inner cylinder 201, a middle cylinder 202, and an outer cylinder 203, which are sequentially spaced from the inside out. The lower end of the inner cylinder 201 is rotatably mounted on the flotation chamber 100 and connected to an external inlet pipe 204. The upper end of the inner cylinder 201 is connected to and communicates with a first water pipe 310. The inner cylinder 201 contains the inlet chamber 210. A water supply pump (not shown in the figure) is connected to the inlet pipe 204, which can adjust the flow rate of wastewater into the inlet chamber 210 to match the rotation speed of the first water pipe 310. In actual use, the inlet pipe 204 is usually connected to the tubular accumulator of the preceding process. The inner cylinder 201 and the intermediate cylinder 202 define the foam chamber 230, and the intermediate cylinder 202 and the outer cylinder 203 define the clear water chamber 220. The clear water chamber 220 is connected to an external water outlet pipe 205. A water pump is connected to the water outlet pipe 205, which can provide suction force for clear water to enter the clear water pipe 250 through the water outlet pipe 205 and the clear water chamber 220. The outer cylinder 203 is a split structure composed of an upper cylinder and a lower cylinder. The upper end of the upper cylinder is fixedly connected to the intermediate cylinder 202 by a cover plate that seals the upper end of the clear water chamber 220. The cover plate is fixed to the upper end of the intermediate cylinder 202 and extends inward to seal the upper end of the foam chamber 230. A rotating seal (not shown in the figure) is provided between the cover plate and the outer peripheral wall of the inner cylinder 201. The lower cylinder is connected to the clear water pipe 250, which in turn connects the clear water pipe 250 to the clear water chamber 220. The lower cylinder can rotate relative to the upper cylinder, and a rotary seal (not shown in the figure) is provided between them. The flotation cell 240 passes through the upper cylinder and the intermediate cylinder 202 and connects to the froth chamber 230. The lower end of the froth chamber 230 can be connected to an external collection pipe 206 to discharge the froth inside. The rotary seal is a rotary sealing ring as used in the prior art.

[0035] In this embodiment, the linkage unit includes a first rotating ring 430, a second rotating ring 440, and a transmission wheel 450. Both the first rotating ring 430 and the second rotating ring 440 are rotatably sleeved on the outside of the first water pipe 310. The first rotating ring 430 is connected to the top rod 410, and the second rotating ring 440 is connected to the brush 420. A torsion spring connects the first rotating ring 430 to the first water pipe 310. The transmission wheel 450 is rotatably mounted on the first water pipe 310, with its axis along the radial direction of the first water pipe 310. The transmission wheel 450 is located between the first rotating ring 430 and the second rotating ring 440 and abuts against the side walls of the first rotating ring 430 and the second rotating ring 440. The transmission wheel 450 can be made of rubber with a high coefficient of friction, and the surfaces of the first rotating ring 430 and the second rotating ring 440 that abut against the transmission wheel 450 are rough friction surfaces. Alternatively, the transmission wheel 450 may be a bevel gear, with the bevel gear ring corresponding to the first rotating ring 430 and the second rotating ring 440 on the side that abuts against the transmission wheel 450.

[0036] In this embodiment, there are multiple top rods 410 and brushes 420, which are arranged alternately along the axial direction of the first water pipe 310, and there are multiple corresponding linkage units; the multiple top rods 410 are connected by crossbars 460, so that the multiple top rods 410 rotate synchronously.

[0037] In this embodiment, a stop bar 241 is provided on the flotation cell 240. The stop bar 241 is used to abut against the cross bar 460 to prevent the top rod 410 from rotating and resetting when it moves above the flotation cell 240, so that the top rod 410 resets after completely passing the flotation cell 240.

[0038] In this embodiment, the bottom of the flotation cell 240 is further away from the central chamber 200 than the bottom of the flotation cell 240, so as to guide the froth in the flotation cell 240 to flow into the froth cavity 230.

[0039] In this embodiment, a funnel is provided at the bottom of the flotation chamber 100, and a scraper (not shown in the figure) can be connected below the second water pipe 320. When the scraper rotates with the second water pipe 320, it scrapes the sediment at the bottom of the flotation chamber 100 into the funnel. The lower end of the funnel is connected to a sludge discharge pipe.

[0040] In operation, the industrial wastewater treatment system based on precise reagent dosing of the present invention utilizes a motor 312 to drive a roller 311 to rotate, causing the first water pipe 310 to rotate around the center of the flotation chamber 100. Wastewater containing coagulant enters the inlet chamber 210 through the inlet pipe 204, passes through the first water pipe 310 and the second water pipe 320, and then flows backward from the outlet on the second water pipe 320 into the flotation chamber 100. Some impurities in the wastewater mix with the coagulant and settle to the bottom of the flotation chamber 100, while other impurities react with the coagulant and aggregate to form foam that floats on the liquid surface. As the clear water pipe 250 rotates with the first water pipe 310, it collects the clear water in the middle section of the liquid in front of the second water pipe 320 into the clear water chamber 220, and then flows out from the external outlet pipe 205.

[0041] When the flotation assembly 400 rotates with the first water pipe 310, the brush 420 pushes the foam on the liquid surface to move, and when it moves to the flotation tank 240, it pushes the foam into the flotation tank 240. Some of the foam will pass through the gap between the flotation tank 240 and the inner wall of the flotation chamber 100. By setting the flotation tank 240 radially inclined relative to the flotation chamber 100, and positioning the end of the flotation tank 240 connected to the central chamber 200 in front of the end away from the central chamber 200, when the first water pipe 310 rotates, the end of the first water pipe 310 away from the central chamber 200 will approach the flotation tank 240 before the other end. When the brush 420 delivers the foam to the flotation tank 240, the amount of foam passing through the gap can be effectively reduced.

[0042] When the first water pipe 310 rotates above the flotation cell 240, the push rod 410 will abut against the rear side of the flotation cell 240 and be restricted from moving. The first water pipe 310 continues to move, driving the brush 420 to move past the push rod 410 and send the foam to the flotation cell 240. At the same time, the push rod 410 drives the first rotating ring 430 to rotate relative to the first water pipe 310. The first rotating ring 430 drives the second rotating ring 440 to rotate in the opposite direction through the transmission wheel 450, which also causes the brush 420 to rotate forward and send the foam to the flotation cell 240. The rotation of the first rotating ring 430 causes the torsion spring to store force. When the first water pipe 310 moves away from the flotation cell 240, it drives the push rod 410 to gradually detach from the rear side of the flotation cell 240 and move along the upper side of the flotation cell 240 to the front side of the flotation cell 240. Then, under the action of the torsion spring, the push rod 410 swings forward relative to the axis of the first water pipe 310. Through the linkage unit, the brush 420 swings backward and comes into contact with the front side of the flotation cell 240. This not only cleans the back of the brush 420, but also removes the foam in the dead corner of the front side of the flotation cell 240 when the first water pipe 310 drives the brush 420 to continue moving, further improving the foam cleaning effect.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An industrial wastewater treatment system based on fine dosing of chemicals, characterized in that: The application relates to a floating device for waste water treatment. The floating device comprises a floating bin, a center bin, a water inlet assembly and a floating assembly. The floating bin is a cylindrical bin with a blocked bottom and an open top. The center bin is installed at the center of the floating bin. The water inlet assembly comprises a first water pipe and a second water pipe which are both radially arranged on the floating bin.

2. The industrial wastewater treatment system based on fine dosing of chemicals according to claim 1, characterized in that: The first water pipe is above the liquid level in the floating bin and is used to receive waste water and move around the center of the floating bin.

3. The industrial wastewater treatment system based on fine dosing of chemicals according to claim 1, characterized in that: The second water pipe is fixed below the first water pipe and is connected with the first water pipe to supply waste water into the floating bin.

4. The industrial wastewater treatment system based on fine dosing of chemicals according to claim 3, characterized in that: A floating groove is installed on the outer side of the center bin.

5. The industrial wastewater treatment system based on fine dosing of chemicals according to claim 1, characterized in that: The floating groove is open at the top and is higher than the liquid level in the floating bin and lower than the first water pipe.

6. The industrial wastewater treatment system based on fine dosing of chemicals according to claim 2, characterized in that: The floating groove is radially inclined relative to the floating bin and has a gap with the inner wall of the floating bin.

7. The pharmaceutical fine particle-based dosing-based industrial wastewater treatment system according to claim 1, characterized by: Along the rotating direction of the first water pipe, the end of the floating groove connected with the center bin is located in front of the end away from the center bin. The floating assembly comprises a top rod and a brush which are both rotatably installed on the outside of the first water pipe. The top rod and the brush are both located below the axis of the first water pipe and are connected through a linkage unit to rotate in opposite directions. A torsion spring is connected between the top rod and the first water pipe to make the top rod located in front of the brush along the rotating direction of the first water pipe. When the first water pipe rotates above the floating groove, the top rod abuts against the floating groove to store the torsion spring. When the first water pipe moves away from the floating groove, the torsion spring makes the top rod reset, and then the rear side of the brush abuts against the side wall of the floating groove and moves with the first water pipe. The center bin is provided with a water inlet cavity, a clean water cavity and a floating scum cavity which are isolated from each other. The water inlet cavity is connected with the first water pipe, and the floating scum cavity is connected with the floating groove. The center bin is provided with a clean water pipe which is connected with the clean water cavity and the liquid in the floating bin. The clean water pipe is fixedly connected with the first water pipe or the second water pipe. Along the rotating direction of the first water pipe, the clean water pipe is located in front of the second water pipe. The clean water pipe extends along the radial direction of the floating bin. Along the rotating direction of the first water pipe, the front side of the clean water pipe is provided with a water inlet, and the rear side of the second water pipe is provided with a water outlet. The upper end of the floating bin is provided with an annular track coaxial with the floating bin. The end of the first water pipe away from the center of the floating bin is rotatably installed with a roller which rolls along the annular track under the drive of a motor installed on the first water pipe. The center bin comprises an inner cylinder, an intermediate cylinder and an outer cylinder which are sequentially and spacedly sleeved from inside to outside. The lower end of the inner cylinder is rotatably installed on the floating bin and is connected with the water inlet pipe. The upper end of the inner cylinder is connected with the first water pipe. The inner cylinder is the water inlet cavity. The floating scum cavity is defined between the inner cylinder and the intermediate cylinder, and the clean water cavity is defined between the intermediate cylinder and the outer cylinder. The clean water cavity is connected with the water outlet pipe. The outer cylinder is a split structure composed of an upper cylinder and a lower cylinder. The upper end of the upper cylinder is fixed with the intermediate cylinder, and the lower cylinder is connected with the clean water pipe and can rotate relative to the upper cylinder. The floating groove passes through the upper cylinder and the intermediate cylinder and is connected with the floating scum cavity. The linkage unit comprises a first rotating ring, a second rotating ring and a transmission wheel. The first rotating ring and the second rotating ring are both rotatably sleeved on the outside of the first water pipe. The first rotating ring is connected with the top rod, and the second rotating ring is connected with the brush. The torsion spring is connected between the first rotating ring and the first water pipe. The transmission wheel is rotatably installed on the first water pipe and has an axis along the radial direction of the first water pipe. The transmission wheel is located between and abuts against the first rotating ring and the second rotating ring.

8. The pharmaceutical fine particle-based dosing-based industrial wastewater treatment system according to claim 1, characterized by: The plurality of jacks and the plurality of brushes are arranged in sequence and alternately along the first water pipe in the axial direction, and the plurality of corresponding linkage units are provided.

9. The industrial wastewater treatment system based on fine dosing of chemicals according to claim 7, characterized in that: The floatation tank is provided with a blocking rod, the blocking rod is used for abutting against the cross rod, and the blocking rod hinders the jacks from rotating back when the jacks move above the floatation tank, so that the jacks are reset after passing the floatation tank.

10. The pharmaceutical fine particle-based dosing-based industrial wastewater treatment system according to claim 1, characterized by: The bottom of the floatation tank is higher at an end far from the central chamber than at an end close to the central chamber.

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