Fluorine-containing wastewater adsorption device

Abstract

The utility model discloses a fluorine-containing wastewater adsorption device which comprises an adsorption tank body, a water inlet pipe is arranged at the lower part of one side of the adsorption tank body, a water outlet pipe is arranged at the upper part of the other side of the adsorption tank body, a central rotating shaft is arranged inside the adsorption tank body, a motor is arranged outside the adsorption tank body, and an output shaft of the motor extends into the adsorption tank body. The output shaft is connected with the central rotating shaft; a filler bin is arranged in the adsorption tank body and is rotationally connected with the central rotating shaft; a water distribution pipe and a gas distribution pipe which are annularly arranged are arranged in the bottom of the adsorption tank body; the water distribution pipe is higher than the gas distribution pipe. According to the fluorine-containing wastewater adsorption device disclosed by the utility model, the water distribution pipe and the gas distribution pipe are designed at the bottom of the adsorption tank body, during backwashing, double washing is carried out through gas washing and water washing, generated bubbles can be better utilized by adsorption particles, the shearing force and friction force of the bubbles and the adsorption particles can be improved, and the regeneration efficiency of the adsorption particles is improved.

Description

Technical Field

[0001] The utility model belongs to the field of industrial wastewater treatment equipment, and in particular relates to a fluorine-containing wastewater adsorption device. Background Art

[0002] Fluoride-containing wastewater mainly comes from industrial production processes such as metallurgy, glass, plastics, cement, steel, aluminum electrolysis, phosphate fertilizer, semiconductors, and photovoltaics. Existing high-efficiency adsorption devices for fluoride-containing wastewater mainly include activated carbon adsorbers, offline adsorption devices, fixed-bed adsorption towers, and fluidized bed adsorption reactors. Activated carbon adsorbers are usually composed of one or more adsorption tanks and activated carbon fillers. They are simple in structure and easy to operate, and can effectively remove fluoride ions from water. However, their treatment capacity is limited by the saturation of carbon, and the carbon needs to be replaced regularly, resulting in high operating costs. Offline adsorption devices generally use mobile adsorption columns, which can be used in multiple locations and have strong flexibility, but have high technical requirements for operators, and the relatively complex operation process may lead to reduced efficiency. The structure of fixed-bed adsorption towers is relatively stable, and the adsorbent is loaded in the tower, which can achieve continuous flow treatment and high treatment efficiency. However, particle accumulation and blind spots may occur during large flow operation, resulting in uneven flow rate distribution. Fluidized bed adsorption reactors use gas or liquid flow to suspend solid particles. This method enhances the mass transfer rate of substances and can improve removal efficiency, but has high requirements for controlling flow rate and temperature, and has high equipment investment and maintenance costs. Therefore, it is necessary to develop efficient adsorption devices to improve adsorption efficiency, reduce costs, reduce floor space, and realize the regeneration and recycling of adsorbents, so as to improve the economy and sustainability of fluoride-containing wastewater treatment. Utility Model Content

[0003] The utility model aims to provide a fluorine-containing wastewater adsorption device, which solves the problem of low adsorption efficiency of the existing adsorption device.

[0004] The technical solution adopted by the utility model is that the fluorine-containing wastewater adsorption device comprises an adsorption tank body, a water inlet pipe is arranged at the lower part of one side of the adsorption tank body, a water outlet pipe is arranged at the upper part of the other side of the adsorption tank body, a central rotating shaft is arranged inside the adsorption tank body, a motor is arranged outside the adsorption tank body, the output shaft of the motor extends into the adsorption tank body, and the output shaft is connected to the central rotating shaft through a coupling; a stuffing bin is arranged inside the adsorption tank body, and the stuffing bin is rotatably connected to the central rotating shaft; a water distribution pipe and an air distribution pipe arranged in an annular manner are arranged at the bottom of the adsorption tank body, the height of the water distribution pipe is higher than the height of the air distribution pipe, and the water distribution pipe and the air distribution pipe are arranged in a staggered manner.

[0005] The utility model is also characterized in that:

[0006] The filling bin comprises a cylindrical outer cylinder body arranged inside the adsorption tank body, a cylindrical inner cylinder body is arranged inside the cylindrical outer cylinder body, the cylindrical outer cylinder body and the cylindrical inner cylinder body are arranged coaxially and are both rotatably connected to the central rotating shaft; a plurality of adsorption holes are arranged on the outer wall of the cylindrical outer cylinder body; adsorption particles are filled between the inner wall of the cylindrical outer cylinder body and the outer wall of the cylindrical inner cylinder body.

[0007] A number of support rods are horizontally arranged between the inner wall of the cylindrical outer cylinder and the outer wall of the cylindrical inner cylinder, and the support rods are located at the upper and lower parts of the cylindrical outer cylinder; a number of connecting rods are arranged between the inner wall of the cylindrical inner cylinder and the central rotating shaft, and the connecting rods are located at the upper and lower parts of the central rotating shaft.

[0008] A feed hole is arranged at the top of the cylindrical outer cylinder body, and the feed hole extends out of the inner wall of the adsorption tank body; a waste discharge pipe is arranged at the bottom of the cylindrical outer cylinder body, and the waste discharge pipe extends out of the inner wall of the adsorption tank body.

[0009] The water distribution pipe is fixed to the bottom of the adsorption tank body through the first saddle seat, a plurality of aeration plates are arranged on the water distribution pipe, and a liquid inlet pipe is connected to the pipe mouth of the water distribution pipe.

[0010] The air distribution pipe is fixed to the bottom of the adsorption tank body through the second saddle seat, a plurality of air distribution holes are arranged on the air distribution pipe, and an air inlet pipe is connected to the pipe opening of the air distribution pipe.

[0011] A pressure gauge is provided on the intake pipe.

[0012] A sewage pipe is arranged at the bottom of the adsorption tank body, and a sewage valve is arranged on the sewage pipe; an exhaust valve is also arranged on the upper part of the adsorption tank body.

[0013] The beneficial effects of the utility model are:

[0014] (1) The fluorine-containing wastewater adsorption device of the utility model provides conditions for the fluorine-containing wastewater to fully contact with the high-efficiency defluorination adsorption material through a surrounding filling bin. The adsorption material is fully in contact with the fluorine-containing wastewater through the gentle driving effect of rotation. The three adsorption mechanisms of the adsorption material, namely, electrostatic adsorption, ion exchange and coordination, are used to efficiently adsorb the fluorine-containing wastewater, thereby reducing the amount of secondary pollution generated during the treatment process. The treatment efficiency is high, the effluent water quality is good, the use is convenient and the filler is evenly distributed;

[0015] (2) The fluorine-containing wastewater adsorption device of the utility model is designed with a water distribution pipe and an air distribution pipe at the bottom of the adsorption tank body. During backwashing, double washing is performed through air washing and water washing, and the generated bubbles can be better utilized by the high-efficiency adsorption particles, which can increase the shear force and friction between the bubbles and the adsorption particles, thereby improving the regeneration efficiency of the adsorption particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the fluorine-containing wastewater adsorption device of the utility model;

[0017] Figure 2 It is a structural schematic diagram of a packing bin in the fluorine-containing wastewater adsorption device of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the water distribution pipe in the fluorine-containing wastewater adsorption device of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the air distribution pipe in the fluorine-containing wastewater adsorption device of the utility model;

[0020] Figure 5 The utility model is a schematic diagram of the connection between the air distribution pipe, the water distribution pipe and the adsorption tank body in the fluorine-containing wastewater adsorption device.

[0021] In the figure, 1. adsorption tank, 2. water inlet pipe, 3. water outlet pipe, 4. water distribution pipe, 401. aeration plate, 402. first saddle seat, 5. air distribution pipe, 501. air distribution hole, 502. second saddle seat, 6. motor, 7. stuffing bin, 701. cylindrical outer cylinder, 702. cylindrical inner cylinder, 703. adsorption hole, 8. sewage pipe, 9. sewage valve, 10. feed hole, 11. waste discharge pipe, 12. pressure gauge, 13. exhaust valve, 14. central rotating shaft, 15. liquid inlet pipe, 16. air inlet pipe. DETAILED DESCRIPTION

[0022] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0023] Example 1

[0024] The utility model fluorine-containing wastewater adsorption device is as follows Figure 1 As shown, it comprises an adsorption tank body 1, a water inlet pipe 2 is arranged at the lower part of one side of the adsorption tank body 1, and a water outlet pipe 3 is arranged at the upper part of the other side of the adsorption tank body 1, and the water inlet pipe 2 and the water outlet pipe 3 are both made of stainless steel; a sewage pipe 8 is arranged at the bottom of the adsorption tank body 1, and a sewage valve 9 is arranged on the sewage pipe 8; an exhaust valve 13 is also arranged at the upper part of the adsorption tank body 1;

[0025] A central rotating shaft 14 is arranged inside the adsorption tank body 1, and a motor 6 is arranged outside the adsorption tank body 1. The output shaft of the motor 6 extends into the adsorption tank body 1, and the output shaft is connected to the central rotating shaft 14 through a coupling; a stuffing bin 7 is arranged inside the adsorption tank body 1, and the stuffing bin 7 is rotatably connected to the central rotating shaft 14;

[0026] Example 2

[0027] Further, if Figure 2As shown, the filling bin 7 includes a cylindrical outer cylinder 701 arranged inside the adsorption tank body 1, a cylindrical inner cylinder 702 is arranged inside the cylindrical outer cylinder 701, the cylindrical outer cylinder 701 and the cylindrical inner cylinder 702 are coaxially arranged, and both are rotatably connected to the central rotating shaft 14; a plurality of adsorption holes 703 are arranged on the outer wall of the cylindrical outer cylinder 701; a plurality of support rods are horizontally arranged between the inner wall of the cylindrical outer cylinder 701 and the outer wall of the cylindrical inner cylinder 702, and the support rods are located at the upper and lower parts of the cylindrical outer cylinder 701; a plurality of connecting rods are arranged between the inner wall of the cylindrical inner cylinder 702 and the central rotating shaft 14, and the connecting rods are located at the upper and lower parts of the central rotating shaft 14;

[0028] Adsorption particles are filled between the inner wall of the cylindrical outer cylinder 701 and the outer wall of the cylindrical inner cylinder 702. The diameter of the adsorption particles is larger than the diameter of the adsorption holes. The adsorption particles are specifically activated carbon, activated alumina, metal composites, etc.

[0029] A feed hole 10 is provided at the top of the cylindrical outer body 701, and the feed hole 10 extends out of the inner wall of the adsorption tank body 1; a waste discharge pipe 11 is provided at the bottom of the cylindrical outer body 701, and the waste discharge pipe 11 extends out of the inner wall of the adsorption tank body 1;

[0030] Example 3

[0031] Further, if Figure 3-5 As shown, a water distribution pipe 4 and an air distribution pipe 5 arranged in an annular manner are arranged in the bottom of the adsorption tank body 1, the height of the water distribution pipe 4 is higher than the height of the air distribution pipe 5, and the water distribution pipe 4 and the air distribution pipe 5 are arranged in a staggered manner; the water distribution pipe 4 is fixed to the bottom of the adsorption tank body 1 through a first saddle seat 402, a plurality of aeration plates 401 are arranged on the water distribution pipe 4, and a liquid inlet pipe 15 is connected to the pipe mouth of the water distribution pipe 4;

[0032] Example 4

[0033] The regeneration liquid is introduced into the water distribution pipe 4 through the liquid inlet pipe 15, and the regeneration liquid is sprayed into the cylindrical outer cylinder 701 through the aeration plate 401. The regeneration liquid has a shear force generated by a certain flow rate and generates friction with the adsorption material. The regeneration liquid flows in from bottom to top, so that the adsorption particles are fully in contact with the regeneration liquid, thereby improving the regeneration efficiency and the adsorption efficiency of the adsorption particles after regeneration, which greatly reduces the cost of subsequent operation and maintenance.

[0034] The air distribution pipe 5 is fixed to the bottom of the adsorption tank body 1 through the second saddle seat 502. A plurality of air distribution holes 501 are provided on the air distribution pipe 5. The pipe opening of the air distribution pipe 5 is connected to an air intake pipe 16. The air intake pipe 16 is provided with a pressure gauge 12. The water distribution pipe 4 and the air distribution pipe 5 are both made of stainless steel.

[0035] Example 5

[0036] Use an air compressor to introduce air into the air inlet pipe 16, and the gas is ejected through the air distribution hole 501. When the gas meets the regeneration liquid, floating bubbles are generated. The density of the gas in the bubbles is less than the density of water. During the rising process, the bubbles will absorb the surrounding water gas and continue to grow, so that the buoyancy will be further enhanced. The bubbles gradually float up. During the floating process from bottom to top, the bubbles are in full contact with the adsorption particles. The shear force generated and the friction force of the adsorption particles can greatly improve the regeneration efficiency of the adsorption material and the adsorption efficiency of the adsorption particles after regeneration, greatly reducing the cost of later operation and maintenance. After the adsorption particles are flushed using the water distribution pipe 4 and the air distribution pipe 5, open the sewage pipe 8 to discharge the sewage.

[0037] Example 6

[0038] The specific working principle of the utility model fluorine-containing wastewater adsorption device is as follows:

[0039] Fluorine-containing wastewater is introduced into the adsorption tank 1 through the water inlet pipe 2, and the fluorine-containing wastewater enters between the cylindrical outer cylinder 701 and the cylindrical inner cylinder 702, and the motor 6 is started. The motor 6 rotates to drive the central rotating shaft to rotate, and then drives the cylindrical outer cylinder 701 and the cylindrical inner cylinder 702 to rotate. During the rotation process, the wastewater is fully in contact with the adsorption particles, and the three adsorption mechanisms of the adsorption particles, namely, electrostatic adsorption, ion exchange and coordination, are used to efficiently adsorb the fluorine-containing wastewater, reduce the amount of secondary pollution generated during the treatment process, and improve the adsorption efficiency. After the adsorption is completed, the wastewater is discharged through the outlet pipe 3, and the wastewater treatment is completed.

[0040] The fluorine-containing wastewater adsorption device of the utility model regenerates and backwashes the filler of the filler bin 7, utilizes the shear force and friction force generated by the liquid and bubbles, and contacts with the adsorption particles, thereby improving the adsorption efficiency after the adsorption particles are regenerated. A central rotating shaft 14 is arranged in the adsorption tank body 1, and the central rotating shaft 14 is driven to rotate by the motor 6, thereby rotating the filler bin 7, so that the wastewater and the adsorption particles are more fully contacted.

Claims

1. Fluorine-containing wastewater adsorption device, characterized in that: The invention comprises an adsorption tank body (1), wherein a water inlet pipe (2) is arranged at the lower part of one side of the adsorption tank body (1), and a water outlet pipe (3) is arranged at the upper part of the other side of the adsorption tank body (1); a central rotating shaft (14) is arranged inside the adsorption tank body (1); a motor (6) is arranged outside the adsorption tank body (1), and an output shaft of the motor (6) extends into the adsorption tank body (1), and the output shaft is connected to the central rotating shaft (14) through a coupling; a stuffing bin (7) is arranged inside the adsorption tank body (1), and the stuffing bin (7) is rotatably connected to the central rotating shaft (14); and a water distribution pipe (4) and an air distribution pipe (5) arranged in an annular manner are arranged at the bottom of the adsorption tank body (1), the height of the water distribution pipe (4) is higher than the height of the air distribution pipe (5), and the water distribution pipe (4) and the air distribution pipe (5) are arranged in a staggered manner.

2. The fluorine-containing wastewater adsorption device according to claim 1, characterized in that: The filling bin (7) comprises a cylindrical outer body (701) arranged inside the adsorption tank body (1), a cylindrical inner body (702) being arranged inside the cylindrical outer body (701), the cylindrical outer body (701) and the cylindrical inner body (702) being arranged coaxially and both being rotatably connected to the central rotation axis (14); a plurality of adsorption holes (703) are arranged on the outer wall of the cylindrical outer body (701); and adsorption particles are filled between the inner wall of the cylindrical outer body (701) and the outer wall of the cylindrical inner body (702).

3. The fluorine-containing wastewater adsorption device according to claim 2, characterized in that: A plurality of support rods are horizontally arranged between the inner wall of the cylindrical outer cylinder (701) and the outer wall of the cylindrical inner cylinder (702), and the support rods are located at the upper part and the lower part of the cylindrical outer cylinder (701); and a plurality of connecting rods are arranged between the inner wall of the cylindrical inner cylinder (702) and the central rotating shaft (14), and the connecting rods are located at the upper part and the lower part of the central rotating shaft (14).

4. The fluorine-containing wastewater adsorption device according to claim 2, characterized in that: A feed hole (10) is provided at the top of the cylindrical outer body (701), and the feed hole (10) extends out of the inner wall of the adsorption tank body (1); a waste discharge pipe (11) is provided at the bottom of the cylindrical outer body (701), and the waste discharge pipe (11) extends out of the inner wall of the adsorption tank body (1).

5. The fluorine-containing wastewater adsorption device according to claim 1, characterized in that: The water distribution pipe (4) is fixed to the bottom of the adsorption tank body (1) via a first saddle seat (402); a plurality of aeration plates (401) are provided on the water distribution pipe (4); and a liquid inlet pipe (15) is connected to the pipe opening of the water distribution pipe (4).

6. The fluorine-containing wastewater adsorption device according to claim 1, characterized in that: The air distribution pipe (5) is fixed to the bottom of the adsorption tank body (1) via a second saddle seat (502); a plurality of air distribution holes (501) are provided on the air distribution pipe (5); and an air inlet pipe (16) is connected to the pipe opening of the air distribution pipe (5).

7. The fluorine-containing wastewater adsorption device according to claim 6, characterized in that: The air inlet pipe (16) is provided with a pressure gauge (12).

8. The fluorine-containing wastewater adsorption device according to claim 1, characterized in that: A sewage discharge pipe (8) is provided at the bottom of the adsorption tank body (1), and a sewage discharge valve (9) is provided on the sewage discharge pipe (8); an exhaust valve (13) is also provided at the top of the adsorption tank body (1).

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