CN214327416U - Fluorine-containing wastewater treatment device - Google Patents

Abstract

The utility model provides a fluorine-containing wastewater treatment device, which comprises a reaction sedimentation tank, a flocculation sedimentation tank, a mechanical stirring clarification tank, a standing sedimentation clarification tank, a filter tank, a fluorine-removing resin tank and a water collecting tank which are connected in sequence; the reaction sedimentation tank, the flocculation sedimentation tank, the mechanical stirring clarification tank and the standing sedimentation clarification tank are arranged in a sequential fall manner, so that the wastewater is automatically and sequentially treated in the reaction sedimentation tank, the flocculation sedimentation tank, the mechanical stirring clarification tank and the standing sedimentation clarification tank; the standing sedimentation clarification tank is connected with the filtering tank through a water pump, the filtering tank is connected with the defluorination resin tank through the water pump, and the defluorination resin tank is connected with the water collecting tank through the water pump; the reaction sedimentation tank, the flocculation sedimentation tank, the mechanical stirring clarification tank and the standing sedimentation clarification tank are also connected with the sludge sedimentation tank through a sludge pump. The fluorine-containing wastewater treatment device has reasonable structure, can reduce suspended matters in water and reduce the operation cost.

Description

Fluorine-containing wastewater treatment device

Technical Field

The utility model relates to an industrial waste water removes fluorine technical field, especially relates to a fluoride waste water treatment device.

Background

The wastewater generally includes domestic wastewater and industrial wastewater, and the wastewater must be treated before being discharged because the wastewater pollutes the environment and is harmful to human life, wherein the wastewater discharge standard is specified for the industrial wastewater in countries and places because the industrial wastewater contains various harmful substances and has high toxicity, and thus, the wastewater treatment system is very important in industrial production.

At present, the main treatment method of the fluorine-containing wastewater is a chemical precipitation method, the equipment structure for the chemical precipitation method is not reasonable enough, the treated effluent is difficult to reach the standard, the content of suspended matters in the water is high, and the operation cost is high.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a rational in infrastructure, can reduce the fluoride waste water treatment facilities of aquatic suspended solid and reduction running cost.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a fluorine-containing wastewater treatment device comprises a reaction sedimentation tank, a flocculation sedimentation tank, a mechanical stirring clarification tank, a standing sedimentation clarification tank, a filter tank, a fluorine-removing resin tank and a water collection tank which are connected in sequence;

the reaction sedimentation tank, the flocculation sedimentation tank, the mechanical stirring clarification tank and the standing sedimentation clarification tank are arranged in a sequential fall manner, so that the wastewater is automatically and sequentially treated in the reaction sedimentation tank, the flocculation sedimentation tank, the mechanical stirring clarification tank and the standing sedimentation clarification tank; the standing sedimentation clarification tank is connected with the filtering tank through a water pump, the filtering tank is connected with the defluorination resin tank through the water pump, and the defluorination resin tank is connected with the water collecting tank through the water pump; the reaction sedimentation tank, the flocculation sedimentation tank, the mechanical stirring clarification tank and the standing sedimentation clarification tank are also connected with the sludge sedimentation tank through a sludge pump.

Further, be equipped with the folded plate of 2 vertical settings in the reaction sedimentation tank, the folded plate will react sedimentation tank inside and fall into aeration tank, agitator tank and the triplex box structure of static caisson that communicates from a left side to the right side in proper order, and form S type flow path between aeration tank to the static caisson, aeration tank bottom is equipped with the aeration pipe, is equipped with first stirring rake in the agitator tank.

Furthermore, a partition board is arranged in the flocculation sedimentation tank, the partition board divides the inner part of the flocculation sedimentation tank into an upper part and a lower part, the upper part is a stirring area, the lower part is a sedimentation area, and the middle part of the partition board is provided with a through hole to form a blanking channel; the stirring area is provided with a second stirring paddle, and the bottom of the settling area is provided with a flow guide column with a thin upper part and a thick lower part opposite to the blanking channel; the bottom of the settling area is provided with a drain outlet, and the upper part of the settling area is provided with a liquid outlet.

Furthermore, the middle part of the clapboard is sunken downwards to form an inverted cone-shaped structure.

Further, the standing sedimentation clarification tank comprises a first sedimentation cavity, a second sedimentation cavity and a third sedimentation cavity which are sequentially communicated from left to right, and the first sedimentation cavity, the second sedimentation cavity and the third sedimentation cavity are arranged in a sequential fall manner, so that wastewater automatically flows through the first sedimentation cavity, the second sedimentation cavity and the third sedimentation cavity in sequence; the lower parts of the right sides of the interiors of the first sedimentation cavity, the second sedimentation cavity and the third sedimentation cavity are provided with guide plates which are arranged in a downward inclining mode, and gaps are reserved between the guide plates and the left side wall of the sedimentation cavity; the lateral wall above the guide plate is provided with a water outlet, and the bottoms of the first sedimentation cavity, the second sedimentation cavity and the third sedimentation cavity are provided with sewage outlets.

Furthermore, N separation nets are arranged in the tank body of the fluorine removal resin tank from top to bottom, the separation nets divide the interior of the tank body into N +1 fluorine removal cavities from top to bottom, spiral blade-shaped drainage plates are arranged between every two adjacent separation nets, and a material capable of adsorbing and removing fluorine is filled between every two adjacent separation nets; the tank body above the uppermost layer of the separation net is provided with a water inlet pipe, and the tank body below the lowermost layer of the separation net is provided with a water outlet pipe.

Furthermore, a water distributor is arranged above the uppermost separation net, the water inlet pipe is L-shaped, the horizontal section of the water inlet pipe is positioned below the water distributor, and the vertical section of the water inlet pipe upwards penetrates through the water distributor so that the water outlet end of the water inlet pipe is upwards positioned above the water distributor.

Furthermore, the number of the separation nets is 5, and special defluorination resin, rare earth filter materials, iron sand filter materials and activated carbon adsorbent particles are sequentially filled between every 2 adjacent separation nets from top to bottom.

Further, the filling thicknesses of the activated carbon adsorbent particles, the iron sand filter material, the rare earth filter material and the special defluorination resin are 80-100 mm, 180-200 mm and 650-700 mm in sequence.

Further, the particle size of the iron-carbon particles is 3-5 mm, the particle size of the iron sand filter material is 2.0-3.0 mm, the particle size of the rare earth filter material is 1.0-0.5 mm, and the particle size of the special defluorination resin layer is 0.4-0.6 mm.

Compared with the prior art, the fluorine-containing wastewater treatment device and the treatment method thereof have the following advantages:

1. the fluorine-containing wastewater treatment device of the utility model is provided with a reaction sedimentation tank, a flocculation sedimentation tank, a mechanical stirring clarification tank, a standing sedimentation clarification tank, a filtering tank, a defluorination resin tank and a water collection tank which are connected in sequence; the reaction sedimentation tank is used for adding calcium salt to form calcium fluoride sediment, the flocculation sedimentation tank is used for adding a flocculating agent to form sediment, the reaction sedimentation tank and the flocculation sedimentation tank can effectively ensure that most of fluoride ions are removed, the sediment in water can be effectively removed through the mechanical stirring clarification tank and the standing sedimentation clarification tank, the filtering tank can remove suspended matters in water, and the defluorination resin tank is used as the last layer to ensure that the fluoride ions and the suspended matters in the water are removed again. Through the device, the concentration of fluorine ions in water can be effectively reduced, suspended matters in water can be removed, the discharge requirements of various places can be met, and the treated wastewater can be recycled and also can be directly discharged.

2. The reaction sedimentation tank of the utility model adopts a three-header structure of an aeration tank, a stirring tank and a static caisson, water is fed into the aeration tank and an aeration stirring method is adopted, the aeration stirring is carried out to ensure the bottom reaction to be thorough, an aeration head is arranged at the bottom of the reaction tank, bottom sediments and unreacted medicaments can be stirred to be fully reflected, the bottom sediment cannot be utilized due to high specific gravity, and the stirring is promoted; the stirring box adopts the stirring paddle for stirring, the stirring speed can be controlled by the stirring paddle, most of the reaction has occurred at the moment, the stirring with large strength is not needed, and the sediment is needed to be slowly generated, so that the stirring speed can be reduced, and the slow mixing can be carried out. Two kinds of stirring are one fast and one slow, the aeration is upwards more thorough from the bottom, and the stirring rake is for coagulating the formation that promotes the flowers floc at a slow speed, for better flocculation and precipitation of next step prepares, has aeration and two kinds of stirring modes simultaneously, and the disturbance of reinforcing water and medicament mix fully, improve the fluorine removal effect. And finally, a static settling tank is arranged, the disturbance of water flow is slowed down, the sedimentation of sludge is facilitated, and the sludge is discharged discontinuously at the bottom.

3. The flocculation sedimentation tank in be divided into about stirring region and the sedimentation region of two parts, form to deposit in the stirring region and fall into the sedimentation region and stew, baffle and water conservancy diversion post can reduce the influence that upper portion rivers mix and deposit the lower part.

4. The sedimentation clarification tank that stews including first sedimentation chamber, second sedimentation chamber and the third sedimentation that the order drop set up, be equipped with the guide plate in the sedimentation chamber, the precipitate can fall in the region of guide plate below along the guide plate, the guide plate separates the precipitate with the water of top delivery port department, reduces the probability that the precipitate flows away along with the rivers.

5. Defluorination resin jar in be equipped with the multilayer and separate the net, separate to pack between the net and have the material that can adsorb the defluorination, and separate and be equipped with the drainage plate of spiral lobate between the net. Waste water flows through the defluorination material along the drainage plate, and the drainage plate prolongs the flow path of the waste water, increases the contact time with the defluorination material and is more favorable for defluorination. The defluorination resin tank upper portion is equipped with the water-locator, and the inlet tube passes the water-locator and sprays water upwards, and the water is turned back downwards by the tank deck after spraying the tank deck, has played the effect of dispersed rivers, and the water-locator makes water distribution more even, slows down the velocity of water on the one hand, and on the other hand increases the area of contact of water and defluorination material, improves the defluorination effect.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic structural view of a fluorine-containing wastewater treatment device according to an embodiment of the present invention;

FIG. 2 is a top view of the internal structure of a primary coagulation-precipitation reaction tank according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a defluorinating resin tank according to an embodiment of the present invention;

FIG. 4 is a sectional view of a defluorinating resin tank according to an embodiment of the present invention.

Description of reference numerals:

1-a reaction sedimentation tank; 11-an aeration tank; 12-a stirring box; 13-a static caisson; 14-a communication port; 2-a flocculation sedimentation tank; 21-a separator; 22-a second stirring paddle; 23-a flow guide column; 3-mechanically stirring the clarification tank; 4-standing a sedimentation clarification tank; 41-a first sedimentation chamber; 42-a second settling chamber; 43-a third settling chamber; 44-a baffle; 45-water outlet; 46-a sewage draining outlet; 5-a filtering tank; 6-defluorination resin tank; 61-tank body; 62-separation net; 63-a drainage plate; 64-a water distributor; 65-a water inlet pipe; 66-a water outlet pipe; 7-a water collecting tank; 8-sludge settling tank.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

FIG. 1 is a schematic structural view of a fluorine-containing wastewater treatment device according to an embodiment of the present invention.

As shown in fig. 1, a fluorine-containing wastewater treatment device comprises a reaction sedimentation tank 1, a flocculation sedimentation tank 2, a mechanical stirring clarification tank 3, a standing sedimentation clarification tank 4, a filter tank 5, a fluorine removal resin tank 6 and a water collection tank 7 which are connected in sequence;

the reaction sedimentation tank 1, the flocculation sedimentation tank 2, the mechanical stirring clarification tank 3 and the standing sedimentation clarification tank 4 are arranged in a sequential fall manner, so that the wastewater is automatically and sequentially treated in the reaction sedimentation tank 1, the flocculation sedimentation tank 2, the mechanical stirring clarification tank 3 and the standing sedimentation clarification tank 4; the standing sedimentation clarification tank 4 is connected with a filter tank 5 through a water pump, the filter tank 5 is connected with a defluorination resin tank 6 through the water pump, and the defluorination resin tank 6 is connected with a water collecting tank 7 through the water pump; the reaction sedimentation tank 1, the flocculation sedimentation tank 2, the mechanical stirring clarification tank 3 and the standing sedimentation clarification tank 4 are also connected with a sludge sedimentation tank 8 through a sludge pump.

The fluorine-containing wastewater treatment device is provided with a reaction sedimentation tank 1, a flocculation sedimentation tank 2, a mechanical stirring clarification tank 3, a standing sedimentation clarification tank 4, a filter tank 5, a defluorination resin tank 6 and a water collection tank 7 which are connected in sequence; the reaction sedimentation tank 1 is used for adding calcium salt to form calcium fluoride sediment, the flocculation sedimentation tank 2 is used for adding flocculating agent to form sediment, the reaction sedimentation tank 1 and the flocculation sedimentation tank 2 can effectively ensure to remove most of fluoride ions, the sediment in the water can be effectively removed through the mechanical stirring clarification tank 3 and the standing sedimentation clarification tank 4, the filtering tank 5 can remove suspended matters in the water, and the defluorination resin tank 6 is used as the last layer to ensure to remove fluoride ions and suspended matters in the water again. Through the device, the concentration of fluorine ions in water can be effectively reduced, suspended matters in water can be removed, the discharge requirements of various places can be met, and the treated wastewater can be recycled and also can be directly discharged.

Illustratively, 2 vertically-arranged folded plates 14 are arranged in the reaction sedimentation tank 1, the folded plates 14 divide the interior of the reaction sedimentation tank 1 into a triple box structure of an aeration tank 11, a stirring tank 12 and a static sedimentation tank 13 which are sequentially communicated from left to right, an S-shaped flow path is formed between the aeration tank 11 and the static sedimentation tank 13, an aeration pipe is arranged at the bottom of the aeration tank 11, and a first stirring paddle is arranged in the stirring tank 12.

Specifically, as shown in fig. 2, a gap is left between the front side of the flap 14 between the aeration tank 11 and the stirring tank 12 and the side wall of the reaction sedimentation tank 1 to facilitate circulation, a gap is left between the rear side of the flap 14 between the stirring tank 12 and the static sedimentation tank 13 and the side wall of the reaction sedimentation tank 1 to facilitate circulation, and 2 flaps 14 and the side wall of the reaction sedimentation tank 1 together form an S-shaped flow path.

The reaction sedimentation tank 1 adopts a triple box structure of an aeration box 11, a stirring box 12 and a static settling tank 13, and has two stirring modes of aeration and stirring simultaneously, so that the disturbance of water and the mixing of medicaments are enhanced fully, and the defluorination effect is improved.

Illustratively, a partition plate 21 is arranged in the flocculation sedimentation tank 2, the partition plate 21 divides the interior of the flocculation sedimentation tank 2 into an upper part and a lower part, the upper part is a stirring area, the lower part is a sedimentation area, and a through hole is formed in the middle of the partition plate 21 to form a blanking channel; the stirring area is provided with a second stirring paddle 22, and the bottom of the settling area is provided with a flow guide column 23 with a thin upper part and a thick lower part opposite to the blanking channel; the bottom of the settling area is provided with a drain outlet, and the upper part of the settling area is provided with a liquid outlet.

Specifically, the middle part of the partition 21 is recessed downward to form an inverted cone-shaped structure.

The flocculation sedimentation tank 2 is divided into an upper stirring area and a lower sedimentation area, sediment formed in the stirring area falls into the sedimentation area, and the sedimentation area is kept still and sinks, and the partition plate 21 and the flow guide column 23 can reduce the influence of the stirring of the water flow at the upper part on the sediment at the lower part.

Illustratively, the standing sedimentation clarification tank 4 comprises a first sedimentation chamber 41, a second sedimentation chamber 42 and a third sedimentation chamber 43 which are communicated from left to right, and the first sedimentation chamber 41, the second sedimentation chamber 42 and the third sedimentation chamber 43 adopt a sequential fall arrangement, so that the wastewater automatically flows through the first sedimentation chamber 41, the second sedimentation chamber 42 and the third sedimentation chamber 43 in sequence; the lower parts of the right sides of the first settling cavity 41, the second settling cavity 42 and the third settling cavity 43 are provided with guide plates 44 which are arranged in a downward inclination mode, and gaps are reserved between the guide plates 44 and the left side wall of the settling cavity; a water outlet 45 is arranged on the side wall above the guide plate 44, and sewage outlets 46 are arranged at the bottoms of the first settling cavity 41, the second settling cavity 42 and the third settling cavity 43.

The standing sedimentation clarification tank 4 comprises a first sedimentation cavity 41, a second sedimentation cavity 42 and a third sedimentation cavity 43 which are arranged in sequence through fall, a guide plate 44 is arranged in each sedimentation cavity, sediments can fall on an area below the guide plate along the guide plate 44, the guide plate 44 separates the sediments from water at a water outlet above the sediments, the probability that the sediments flow away along with the water is reduced, and the water quality is improved.

Illustratively, N separation nets 62 are arranged in a tank body 61 of the fluorine removal resin tank 6 from top to bottom, the separation nets 62 divide the interior of the tank body 61 into N +1 fluorine removal cavities from top to bottom, a spiral-blade-shaped drainage plate 63 is arranged between every two adjacent separation nets 62, and a material capable of adsorbing and removing fluorine is filled between every two adjacent separation nets 62; a water inlet pipe 65 is arranged on the tank body 61 above the uppermost layer of the separation net 62, and a water outlet pipe 65 is arranged on the tank body 61 below the lowermost layer of the separation net 62.

Specifically, a water distributor 64 is arranged above the uppermost partition net 62, the water inlet pipe 65 is L-shaped, the horizontal section of the water inlet pipe 65 is positioned below the water distributor 64, and the vertical section of the water inlet pipe 65 passes through the water distributor 64 upward so that the water outlet end of the water inlet pipe 65 faces upward and is positioned above the water distributor 64.

Specifically, the number of the separation nets 62 is 5, and special defluorination resin, rare earth filter materials, iron sand filter materials and activated carbon adsorbent particles are sequentially filled between every 2 adjacent separation nets 62 from top to bottom.

More specifically, the filling thicknesses of the activated carbon adsorbent particles, the iron sand filter material, the rare earth filter material and the special defluorination resin are 80 mm-100 mm, 180 mm-200 mm and 650 mm-700 mm in sequence.

More specifically, the particle size of the iron-carbon particles is 3-5 mm, the particle size of the iron sand filter material is 2.0-3.0 mm, the particle size of the rare earth filter material is 1.0-0.5 mm, and the particle size of the special defluorination resin layer is 0.4-0.6 mm.

The defluorination resin tank 6 is internally provided with a plurality of layers of separation nets 62, materials capable of adsorbing defluorination are filled between the separation nets 62, and spiral-leaf-shaped drainage plates 63 are arranged between the separation nets 62. Waste water flows through the defluorinating material along the drainage plate 63, and the drainage plate 63 prolongs the flow path of the waste water, increases the contact time with the defluorinating material, and is more beneficial to defluorinating. The upper part of the defluorination resin tank 6 is provided with a water distributor 64, a water inlet pipe 65 penetrates through the water distributor 64 and sprays water upwards, the water is sprayed to the tank top and then is turned back downwards by the tank top, the effect of dispersing water flow is achieved, the water distributor 64 enables the water to be distributed more evenly, on one hand, the water flow speed is slowed down, on the other hand, the contact area of the water and the defluorination material is increased, and the defluorination effect is improved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a fluoride waste water treatment facilities which characterized in that: comprises a reaction sedimentation tank (1), a flocculation sedimentation tank (2), a mechanical stirring clarification tank (3), a standing sedimentation clarification tank (4), a filter tank (5), a defluorination resin tank (6) and a water collection tank (7) which are connected in sequence;

the reaction sedimentation tank (1), the flocculation sedimentation tank (2), the mechanical stirring clarification tank (3) and the standing sedimentation clarification tank (4) are arranged in a sequential fall manner, so that the wastewater is automatically and sequentially treated in the reaction sedimentation tank (1), the flocculation sedimentation tank (2), the mechanical stirring clarification tank (3) and the standing sedimentation clarification tank (4); the standing sedimentation clarification tank (4) is connected with the filtering tank (5) through a water pump, the filtering tank (5) is connected with the defluorination resin tank (6) through the water pump, and the defluorination resin tank (6) is connected with the water collecting tank (7) through the water pump; the reaction sedimentation tank (1), the flocculation sedimentation tank (2), the mechanical stirring clarification tank (3) and the standing sedimentation clarification tank (4) are also connected with a sludge sedimentation tank (8) through a sludge pump.

2. The fluorine-containing wastewater treatment apparatus according to claim 1, characterized in that: the reaction sedimentation tank is characterized in that 2 vertically-arranged folded plates (14) are arranged in the reaction sedimentation tank (1), the folded plates (14) divide the interior of the reaction sedimentation tank (1) into a triple box structure comprising an aeration box (11), a stirring box (12) and a static caisson (13) which are sequentially communicated from left to right, an S-shaped flow path is formed between the aeration box (11) and the static caisson (13), an aeration pipe is arranged at the bottom of the aeration box (11), and a first stirring paddle is arranged in the stirring box (12).

3. The fluorine-containing wastewater treatment apparatus according to claim 1, characterized in that: a partition plate (21) is arranged in the flocculation sedimentation tank (2), the inside of the flocculation sedimentation tank (2) is divided into an upper part and a lower part by the partition plate (21), the upper part is a stirring area, the lower part is a sedimentation area, and a through hole is formed in the middle of the partition plate (21) to form a blanking channel; the stirring area is provided with a second stirring paddle (22), and the bottom of the settling area is provided with a flow guide column (23) which is thin at the top and thick at the bottom and is opposite to the blanking channel; the bottom of the settling area is provided with a drain outlet, and the upper part of the settling area is provided with a liquid outlet.

4. The fluorine-containing wastewater treatment apparatus according to claim 3, characterized in that: the middle part of the clapboard (21) is sunken downwards to form an inverted cone-shaped structure.

5. The fluorine-containing wastewater treatment apparatus according to claim 1, characterized in that: the standing sedimentation clarification tank (4) comprises a first sedimentation chamber (41), a second sedimentation chamber (42) and a third sedimentation chamber (43) which are sequentially communicated from left to right, and the first sedimentation chamber (41), the second sedimentation chamber (42) and the third sedimentation chamber (43) are arranged in a sequential fall manner, so that wastewater automatically and sequentially flows through the first sedimentation chamber (41), the second sedimentation chamber (42) and the third sedimentation chamber (43); the lower parts of the right sides of the interiors of the first settling cavity (41), the second settling cavity (42) and the third settling cavity (43) are provided with guide plates (44) which are arranged in a downward inclining mode, and gaps are reserved between the guide plates (44) and the left side wall of the settling cavity; a water outlet (45) is arranged on the side wall above the guide plate (44), and drain outlets (46) are arranged at the bottoms of the first precipitation cavity (41), the second precipitation cavity (42) and the third precipitation cavity (43).

6. The fluorine-containing wastewater treatment apparatus according to claim 1, characterized in that: n separation nets (62) are arranged in a tank body (61) of the fluorine removal resin tank (6) from top to bottom, the separation nets (62) divide the interior of the tank body (61) into N +1 fluorine removal cavities from top to bottom, spiral leaf-shaped drainage plates (63) are arranged between every two adjacent separation nets (62), and a material capable of adsorbing and removing fluorine is filled between every two adjacent separation nets (62); a water inlet pipe (65) is arranged on the tank body (61) above the uppermost layer of the separation net (62), and a water outlet pipe (66) is arranged on the tank body (61) below the lowermost layer of the separation net (62).

7. The fluorine-containing wastewater treatment apparatus according to claim 6, characterized in that: a water distributor (64) is arranged above the separation net (62) at the uppermost layer, the water inlet pipe (65) is L-shaped, the horizontal section of the water inlet pipe (65) is positioned below the water distributor (64), and the vertical section of the water inlet pipe upwards penetrates through the water distributor (64) so that the water outlet end of the water inlet pipe (65) faces upwards and is positioned above the water distributor (64).

8. The fluorine-containing wastewater treatment apparatus according to claim 6, characterized in that: the number of the separation nets (62) is 5, and special defluorination resin, rare earth filter materials, iron sand filter materials and activated carbon adsorbent particles are sequentially filled between every 2 adjacent separation nets (62) from top to bottom.

9. The fluorine-containing wastewater treatment apparatus according to claim 8, characterized in that: the filling thicknesses of the activated carbon adsorbent particles, the iron sand filter material, the rare earth filter material and the special defluorination resin are 80-100 mm, 180-200 mm and 650-700 mm in sequence.

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