Percolate defluorination device

Abstract

The utility model relates to the field of hazardous waste treatment equipment, in particular to a percolate defluorination device, which comprises a defluorination unit, a water liquid collecting component and a pollution discharge component, an inclined wall and a conical funnel are arranged at the bottom of a tank body of a defluorination tank of the defluorination unit, a water inlet hole and a water outlet hole are arranged on the left side wall and the right side wall of the tank body, and the water inlet hole is higher than the water outlet hole. A buffer pipe, a stirrer and an anti-disturbance plate of the defluorination unit are arranged above the inclined wall at the bottom of the tank body; a buffer plate and a dispersion conical block are respectively arranged inside and at the bottom of a pipe body of the buffer pipe; an anti-disturbance plate is arranged below the stirrer; a plurality of groups of fluorine removal units are arranged side by side, and the fluorine removal tanks of two adjacent groups of fluorine removal units are communicated with each other; the percolate injected into the first group automatically flows to the last group by utilizing a plurality of groups of fluorine removal units which are communicated in a gradient manner, and multi-stage reaction precipitation is performed to realize continuous fluorine removal; the buffer pipe is used for reducing water flow impact, and the anti-disturbance plate below the stirrer is used for reducing disturbance to sediments at the bottom of the defluorination tank, so that the defluorination operation efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hazardous waste treatment equipment, and particularly relates to a leachate fluorine removal device. BACKGROUND

[0002] Industrial leachate often contains hydrofluoric acid or other fluorides, and if fluorine ions are not removed before leachate evaporation and crystallization treatment, they will combine with calcium ions to form calcium fluoride deposits in the evaporation equipment. The deposited scale is easy to block the evaporation equipment, affecting the normal operation of the equipment. At present, the precipitation method is a relatively economical and practical fluorine removal method before treating leachate. By adding calcium hydroxide or calcium chloride reagent and other flocculants into the fluorine-containing leachate to react and precipitate for a long time, and then filtering the fluorine-containing precipitate and treating it as solid waste, fluorine can be removed. However, most of the current fluorine removal devices use a batch of reaction tanks one by one. Due to the limited capacity of each batch of reaction tanks and the long reaction and precipitation time, the operation efficiency is low. Especially when the amount of leachate is large and needs to be continuously treated, it is difficult to meet the requirements of efficient treatment by using reaction tanks for batch operation. Therefore, it is necessary to improve the leachate fluorine removal device. If multiple fluorine removal tanks with gradient communication can be set for multi-stage reaction and precipitation, and the disturbance to the precipitate at the bottom of the fluorine removal tank during water flow can be reduced, continuous fluorine removal treatment can be realized, and the operation efficiency of fluorine removal can be improved, which is the problem to be solved by the utility model. SUMMARY

[0003] The utility model discloses a leachate defluorination device, including defluorination unit, water liquid collection subassembly and blowdown subassembly, defluorination unit is equipped with defluorination pool, buffer tube, agitator and anti-disturbance board, and the pool body bottom of defluorination pool is equipped with inclined wall and is placed in the conical hopper of inclined wall low side, and the left and right side wall of pool body is equipped with water inlet and water outlet and water inlet is higher than water outlet, and buffer tube, agitator and anti-disturbance board are all placed on the inclined wall top of pool body bottom, the inside and bottom of pipe body of buffer tube are equipped with buffer board and dispersion cone piece respectively, and anti-disturbance board is placed below agitator, and defluorination unit is several groups and is side by side arrangement, and the defluorination pool of two adjacent groups of defluorination unit is connected, and water liquid collection subassembly is connected with last group defluorination unit, and blowdown subassembly is connected with the blowdown mouth of several groups of defluorination unit.

[0004] To achieve the above object, the technical scheme adopted by the utility model is as follows:

[0005] The application relates to a leachate fluorine removal device which comprises a water liquid collecting assembly and a pollution discharge assembly, characterized in that the device further comprises a fluorine removal unit which is provided with a fluorine removal pool, a buffer pipe, a stirrer and an anti-disturbance plate, the fluorine removal pool comprises a pool body and a pollution discharge port, the bottom of the pool body is provided with an inclined wall which is arranged in an inclined manner and a conical funnel which is arranged at the low side of the inclined wall, the pollution discharge port is connected to the lower opening of the conical funnel at the bottom of the pool body, the buffer pipe, the stirrer and the anti-disturbance plate are arranged in the pool body and above the inclined wall at the bottom of the pool body, the pool body is provided with water inlets and water outlets on the left and right two side walls respectively, and the height of the water inlets is higher than that of the water outlets, the buffer pipe comprises a pipe body, a buffer plate and a dispersion cone block, the buffer plate and the dispersion cone block are arranged in the pipe body and at the bottom of the pipe body respectively, liquid injected from the upper part of the buffer pipe can flow through the buffer plate and the dispersion cone block and can be buffered and diffused by the buffer plate and the dispersion cone block so as to reduce the impact of the liquid on the precipitate at the bottom of the fluorine removal pool when the liquid falls, the anti-disturbance plate is arranged below the stirrer so as to reduce the disturbance of the stirrer to the precipitate at the bottom of the fluorine removal pool when the stirrer works, the fluorine removal unit is provided with a plurality of groups, the plurality of groups of fluorine removal units are arranged side by side, the water outlets and the water inlets of the pool bodies of the fluorine removal pools of the adjacent two groups of fluorine removal units are communicated, and the water liquid in the fluorine removal pool of the former group of fluorine removal units can flow to the fluorine removal pool of the latter group of fluorine removal units, the water liquid collecting assembly is arranged on one side of the last group of fluorine removal units and is communicated with the last group of fluorine removal units, and the pollution discharge assembly is arranged below the plurality of groups of fluorine removal units and is communicated with the plurality of groups of fluorine removal units.

[0006] The fluorine removal pool further comprises a pool cover which is detachably fixed to the upper opening part of the pool body.

[0007] The buffer pipe and the stirrer respectively pass through the through holes of the pool cover of the fluorine removal pool and are inserted into the pool body, and the buffer pipe and the stirrer are fixed to the pool cover.

[0008] The fluorine removal unit is further provided with a water delivery pipe, the water delivery pipe is arranged horizontally, one end of the water delivery pipe is bent downwardly and is inserted into the pipe body of the buffer pipe, the other end of the water delivery pipe passes through the water inlet of the pool body and extends to the outside of the pool body, the end of the water delivery pipe of the latter group of fluorine removal units of the adjacent two groups of fluorine removal units which extends to the outside of the pool body is connected to and fixed to the water outlet of the pool body of the former group of fluorine removal units.

[0009] The pipe body of the buffer pipe is a hollow circular pipe which is provided with a top wall at the top, the buffer plate is a tongue-shaped plate, and the buffer plate is fixed to the inner wall of the pipe body in an inclined manner and is arranged below the downwardly bent end of the water delivery pipe.

[0010] The buffer pipe further comprises a hanger rod, the hanger rod is a Γ-shaped hanger, the hanger rod is provided with a plurality of pieces, the dispersion cone block is a conical body, the dispersion cone block is arranged below the pipe body, the tip of the dispersion cone block is inserted into the pipe body, a drainable gap is arranged between the dispersion cone block and the lower opening of the pipe body, and the dispersion cone block is hung below the pipe body by the plurality of pieces of hanger rod.

[0011] The defluorination unit is further provided with a medicament feeding pipe, the medicament feeding pipe penetrates through the through hole arranged on the top wall of the pipe body of the buffer pipe and is inserted into the pipe body, and the medicament feeding pipe is fixedly connected with the top wall of the pipe body.

[0012] The anti-disturbance plate is a bent plate with a herringbone-shaped cross section, the anti-disturbance plate is arranged below the stirrer, and the two ends of the anti-disturbance plate are fixedly connected with the front and rear side walls of the defluorination pool.

[0013] The water liquid collecting assembly comprises a collecting pool and a water outlet pipe, one end of the water outlet pipe is connected with the water outlet hole of the pool body of the last group of defluorination units, the other end of the water outlet pipe is inserted into the collecting pool, and the water liquid in the pool body of the last group of defluorination units can flow into the collecting pool.

[0014] The pollution discharge assembly comprises a sludge conveying pipe and a conveying pump, the conveying pump is connected with the sludge conveying pipe, the sludge conveying pipe is arranged below the defluorination pools of the plurality of groups of defluorination units and is connected with the pollution discharge openings, and a valve that can be opened and closed is arranged on each pollution discharge opening.

[0015] As can be seen from the above description, the leachate defluorination device has the following advantages: 1. The plurality of groups of defluorination units are arranged side by side, the water outlet hole of the front group of the adjacent two groups of defluorination units is connected with the water inlet hole of the rear group by means of the horizontally arranged water conveying pipe, the water inlet hole on the pool body of each group of defluorination units is higher than the water outlet hole, the leachate can flow from the first group of the plurality of groups of defluorination units to the last group in a gradient connection mode to realize multi-stage reaction and precipitation and continuous defluorination; 2. The pool body of the defluorination unit is provided with an inclined wall and a conical funnel arranged on the low side of the inclined wall, the precipitates in the pool body can slide slowly from the inclined wall to the conical funnel to be gathered, the precipitates are prevented from gathering on the inclined wall, the buffer pipe can prevent the precipitates from being disturbed when liquid is injected and the stirrer can prevent the precipitates from being disturbed when the stirrer is stirred, so that the precipitates and the defluorinated ion water can be better separated; 3. The buffer pipe, the stirrer and the anti-disturbance plate are arranged above the inclined wall at the bottom of the pool body, the liquid injected from the upper part of the buffer pipe can be buffered and diffused by means of the buffer plate and the dispersion cone block on the buffer pipe, so that the precipitates on the bottom of the defluorination pool can be reduced when the liquid falls, the anti-disturbance plate below the stirrer can reduce the disturbance of the precipitates on the bottom of the defluorination pool when the stirrer works, and then the precipitates and the defluorinated ion water can be separated to realize continuous defluorination. The leachate defluorination device is improved, and the operation efficiency of defluorination can be improved. The leachate defluorination device has the advantages of reasonable design, simple structure, low cost and convenience in popularization. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is overall schematic view of the leachate defluorination device;

[0017] Figure 2 It is enlarged schematic view of the defluorination unit;

[0018] Figure 3 It is enlarged schematic view of the defluorination pool;

[0019] Figure 4 It is enlarged schematic view of the buffer pipe;

[0020] Figure 5 It is Figure 4 A-A enlarged schematic view in it;

[0021] Figure 6 It is enlarged schematic view of the anti-disturbance plate.

[0022] Reference signs:

[0023] 1 defluorination unit; 11 defluorination pool; 111 pool body; 112 pool cover; 113 blowdown opening; 12 buffer pipe; 121 pipe body; 122 buffer plate; 123 dispersing cone block; 124 suspender; 13 agitator; 14 anti-disturbance plate; 15 water delivery pipe; 16 reagent feeding pipe; 2 water collection assembly; 21 collection pool; 22 water outlet pipe; 3 blowdown assembly; 31 sludge delivery pipe; 32 delivery pump. DETAILED DESCRIPTION

[0024] The utility model will be further described below through specific implementation.

[0025] As Figure 1 shown, the utility model relates to a kind of leachate defluorination device, including defluorination unit 1, water collection assembly 2 and blowdown assembly 3, the defluorination unit 1 is equipped with several groups, several groups of defluorination unit 1 are arranged side by side, adjacent two groups of defluorination unit 1 are communicated, water liquid in previous group of defluorination unit 1 can be self-flowing to the next group of defluorination unit 1, the water collection assembly 2 is placed in the side of last group of defluorination unit 1 and is communicated with last group of defluorination unit 1, the blowdown assembly 3 is placed in the below of several groups of defluorination unit 1 and is communicated with several groups of defluorination unit 1.

[0026] As Figures 1 to 3As shown in the utility model discloses the defluorination unit 1 is equipped with defluorination pool 11, buffer pipe 12, agitator 13, anti-disturbance board 14, water delivery pipe 15 and reagent feeding pipe 16, defluorination pool 11 includes pool body 111, pool cover 112 and sewage outlet 113, the bottom of pool body 111 is equipped with the inclined wall of inclined arrangement and is placed in the conical hopper of the low side of inclined wall, and pool body 111 is equipped with water inlet hole and water outlet hole on its left and right two side walls respectively and the height of water inlet hole is higher than the height of water outlet hole, the sewage outlet 113 is connected on the lower mouth of the conical hopper of the bottom of pool body 111, and the valve that can open and close is equipped on the sewage outlet 113, the pool cover 112 is covered and detachably fixedly connected on the upper mouth portion of pool body 111, the buffer pipe 12, agitator 13 and anti-disturbance board 14 are all placed in pool body 111 and are placed above the inclined wall of its bottom. The buffer pipe 12 and agitator 13 respectively pass through the through hole of the pool cover 112 of defluorination pool 11 and are inserted into pool body 111, and the buffer pipe 12 and agitator 13 are fixedly connected on the pool cover 112. Water delivery pipe 15 is flat, one end of which is obliquely downwardly bent and inserted into buffer pipe 12, and the other end thereof passes through the water inlet hole of pool body 111 and extends outside pool body 111, and the end of water delivery pipe 15 of the rear group of defluorination units 1 of the adjacent two groups of defluorination units 1 extends outside pool body 111 and is connected to the water outlet hole of the pool body 111 of the front group of defluorination units 1 and is fixedly connected thereto. The anti-disturbance board 14 is a bent plate with a herringbone-shaped cross section, which is placed below the agitator 13, and the two ends of the anti-disturbance board 14 are fixedly connected to the front and rear side walls of the defluorination pool 11, and the anti-disturbance board 14 is used to reduce disturbance of the precipitate at the bottom of the defluorination pool 11 when the agitator 13 is working.

[0027] As Figures 1 to 6 As shown in the utility model discloses the buffer pipe 12 includes pipe body 121, buffer plate 122, dispersion cone block 123 and boom 124, the pipe body 121 of buffer pipe 12 is hollow circular tube and is equipped with top wall at top, the buffer plate 122 is tongue-shaped plate, and the buffer plate 122 is fixedly connected on the inner wall of pipe body 121 and is placed below the obliquely downwardly bent end of water delivery pipe 15. The boom 124 is Γ-shaped hanger, and the boom 124 is provided with several pieces, the dispersion cone block 123 is a cone, and the dispersion cone block 123 is placed below the pipe body 121, and the cone tip is inserted into the pipe body 121, and the dispersion cone block 123 and the lower mouth portion of pipe body 121 are provided with a drainable gap, and the dispersion cone block 123 is hung and fixed below the pipe body 121 by the boom 124. The reagent feeding pipe 16 passes through the through hole provided on the top wall of the pipe body 121 of buffer pipe 12 and is inserted into the pipe body 121, and the reagent feeding pipe 16 is fixedly connected with the top wall of the pipe body 121. The liquid injected from the upper part of buffer pipe 12 can flow through the buffer plate 122 and the dispersion cone block 123 and can be buffered and diffused by the buffer plate 122 and the dispersion cone block 123 for reducing the impact of the liquid falling on the precipitate at the bottom of the defluorination pool 11.

[0028] As Figures 1 to 3 shown, the water collection assembly 2 includes a collection pool 21 and a water outlet pipe 22, one end of the water outlet pipe 22 is connected to the water outlet hole of the pool body 111 of the last group of fluoride removal units 1, and the other end is inserted into the collection pool 21, and the water in the pool body 111 of the last group of fluoride removal units 1 can flow into the collection pool 21. The sewage discharge assembly 3 includes a sludge conveying pipe 31 and a conveying pump 32, the conveying pump 32 is connected to the sludge conveying pipe 31, and the sludge conveying pipe 31 is arranged below the fluoride removal pool 11 of the several groups of fluoride removal units 1 and is connected with the sewage discharge port 113.

[0029] The percolate fluoride removal device of the utility model in use, can send the percolate to be removed fluoride from the water conveying pipe 15 of the first group of fluoride removal units 1 into the fluoride removal pool 11 of the first group of fluoride removal units 1 continuously slowly, and through the buffer pipe 12 buffering and diffusion send into the lower part of pool body 111, the fluoride removal and flocculation reagent is put in the reagent feeding pipe 16 of the first group of fluoride removal units 1, so that the percolate reacts to form precipitate and fluoride ion water, the precipitate sinks to the bottom and is gathered by the conical hopper, the fluoride ion water overflow through the water outlet of pool body 111 and flows into the adjacent second group of fluoride removal units 1, the fluoride removal and flocculation reagent is also put in the reagent feeding pipe 16 of the second group of fluoride removal units 1, so that the residual fluoride ion in the inflowing fluoride ion water reacts again to form precipitate and fluoride ion water, and so on, through continuous multiple reactions and precipitations, until the fluoride ion water formed by the last group of fluoride removal units 1 is collected by the collection pool 21 of the water collection assembly 2, the collected fluoride ion water can be treated by the external wastewater treatment device. The fluoride removal unit 1 can also open the stirrer 13 to homogenize the reagent and promote the fluoride removal reaction during the fluoride removal reaction. The precipitate in the fluoride removal pool 11 can be regularly pumped out by the sewage discharge assembly 3 and sent to the external solid-liquid separation device for separation and collection and treatment of fluoride-containing solid waste.

[0030] The utility model discloses an improved leachate defluorination device, which comprises several groups of defluorination units 1 arranged side by side. The water outlet hole of the front defluorination unit 1 and the water inlet hole of the rear defluorination unit 1 are connected by a horizontal water delivery pipe 15. The water inlet hole on the pool body 111 of each defluorination unit 1 is higher than the water outlet hole, so that the leachate can flow from the first group to the last group of the several groups of defluorination units 1 connected in gradient to realize continuous defluorination through multi-stage reaction and precipitation. An inclined wall is arranged at the bottom of the pool body 111 of the defluorination unit 1, and a conical funnel is arranged on the low side of the inclined wall. The buffer pipe 12, the stirrer 13 and the anti-disturbance plate 14 are arranged above the inclined wall at the bottom of the pool body 111. The buffer plate 122 and the dispersion cone block 123 on the buffer pipe 12 can buffer and diffuse the liquid injected from the upper part of the buffer pipe 12 to reduce the impact on the precipitate at the bottom of the defluorination pool 11 when the liquid falls. The anti-disturbance plate 14 below the stirrer 13 can reduce the disturbance to the precipitate at the bottom of the defluorination pool 11 when the stirrer 13 works, which is conducive to the separation of the precipitate and the defluorination water to realize continuous defluorination, thereby improving the operation efficiency of defluorination.

[0031] The above is only one specific embodiment of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model made by using this concept should be considered as an infringement of the protection scope of the utility model.

Claims

1. A device for removing fluorine from leachate, comprising a water liquid collection assembly (2) and a pollution discharge assembly (3), characterized in that: The device further comprises fluoride removal units (1), each of which is provided with a fluoride removal tank (11), a buffer tube (12), a stirrer (13) and a disturbance prevention plate (14), the fluoride removal tank (11) comprises a tank body (111) and a sewage outlet (113), the bottom of the tank body (111) is provided with an inclined wall and a conical funnel arranged at the low side of the inclined wall, the sewage outlet (113) is connected to the lower opening of the conical funnel at the bottom of the tank body (111), the buffer tube (12), the stirrer (13) and the disturbance prevention plate (14) are arranged in the tank body (111) and above the inclined wall at the bottom of the tank body (111), the tank body (111) is provided with a water inlet hole and a water outlet hole on the left and right two side walls respectively, and the height of the water inlet hole is higher than that of the water outlet hole, the buffer tube (12) comprises a tube body (121), a buffer plate (122) and a dispersion cone block (123), the buffer plate (122) and the dispersion cone block (123) are arranged in the tube body (121) and at the bottom of the tube body (121) respectively, the liquid injected from the upper part of the buffer tube (12) can flow through the buffer plate (122) and the dispersion cone block (123) and be buffered and diffused by the buffer plate (122) and the dispersion cone block (123), the disturbance prevention plate (14) is arranged below the stirrer (13), the fluoride removal units (1) are provided in several groups, the fluoride removal units (1) are arranged side by side, the water outlet hole and the water inlet hole of the tank body (111) of the fluoride removal tank (11) of the adjacent two groups of fluoride removal units (1) are communicated, and the water in the fluoride removal tank (11) of the former group of fluoride removal units (1) can flow into the fluoride removal tank (11) of the latter group of fluoride removal units (1) by itself, the water collecting assembly (2) is arranged on one side of the last group of fluoride removal units (1) and is communicated with the last group of fluoride removal units (1), and the sewage discharge assembly (3) is arranged below the several groups of fluoride removal units (1) and is communicated with the several groups of fluoride removal units (1).

2. The device for removing fluorine from leachate according to claim 1, characterized in that: The fluoride removal tank (11) further comprises a tank cover (112), and the tank cover (112) is covered and fixed to the upper opening of the tank body (111).

3. The device for removing fluorine from leachate according to claim 2, characterized in that: The buffer tube (12) and the stirrer (13) each pass through the through hole of the tank cover (112) of the fluoride removal tank (11) and are inserted into the tank body (111), and the buffer tube (12) and the stirrer (13) are fixed to the tank cover (112).

4. The device for removing fluorine from leachate according to claim 3, characterized in that: The fluoride removal unit (1) is further provided with a water delivery pipe (15), the water delivery pipe (15) is horizontally arranged, one end of the water delivery pipe (15) is obliquely and downwardly bent and is inserted into the tube body (121) of the buffer tube (12), the other end of the water delivery pipe (15) passes through the water inlet hole of the tank body (111) and extends to the outside of the tank body (111), the end of the water delivery pipe (15) of the latter group of fluoride removal units (1) extending to the outside of the tank body (111) of the adjacent two groups of fluoride removal units (1) is connected to the water outlet hole of the tank body (111) of the former group of fluoride removal units (1) and is fixed to the water outlet hole.

5. The device for removing fluorine from leachate according to claim 4, characterized in that: The pipe body (121) of the buffer pipe (12) is a hollow circular pipe with a top wall, and the buffer plate (122) is a tongue-shaped plate member, which is fixedly connected to the inner wall of the pipe body (121) and is arranged below the downwardly and obliquely bent end of the water delivery pipe (15).

6. The device for removing fluorine from leachate according to claim 5, characterized in that: The buffer pipe (12) further comprises a plurality of hangers (124), and the dispersion cone block (123) is a conical body, which is arranged below the pipe body (121) and has a tapered tip inserted into the pipe body (121). A gap is formed between the dispersion cone block (123) and the lower opening of the pipe body (121), and the dispersion cone block (123) is hung below the pipe body (121) by the plurality of hangers (124).

7. The device according to claim 6, characterized in that: The defluorination unit (1) further comprises a medicament feeding pipe (16) which penetrates through the through hole provided on the top wall of the pipe body (121) of the buffer pipe (12) and is inserted into the pipe body (121).

8. The device according to claim 7, characterized in that: The anti-disturbance plate (14) is a bent plate with a herringbone-shaped cross section, which is arranged below the stirrer (13) and is fixedly connected to the side wall of the defluorination tank (11) at both ends.

9. The device according to claim 8, characterized in that: The water collecting assembly (2) comprises a collecting tank (21) and a water outlet pipe (22), one end of the water outlet pipe (22) is connected to the water outlet hole of the tank body (111) of the last defluorination unit (1), and the other end is inserted into the collecting tank (21), so that the water in the tank body (111) of the last defluorination unit (1) can flow into the collecting tank (21) by itself.

10. The device for removing fluorine from leachate according to claim 9, characterized in that: The sewage discharge assembly (3) comprises a sludge conveying pipe (31) and a conveying pump (32), the conveying pump (32) is connected to the sludge conveying pipe (31), the sludge conveying pipe (31) is arranged below the defluorination tank (11) of each defluorination unit (1) and is connected to the sewage discharge port (113), and a valve capable of being opened and closed is arranged on each sewage discharge port (113).

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