CN210048587U - System for treating high-fluoride wastewater - Google Patents
System for treating high-fluoride wastewater Download PDFInfo
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- CN210048587U CN210048587U CN201920594852.6U CN201920594852U CN210048587U CN 210048587 U CN210048587 U CN 210048587U CN 201920594852 U CN201920594852 U CN 201920594852U CN 210048587 U CN210048587 U CN 210048587U
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Abstract
The utility model discloses a handle high fluoride waste water system, the system is according to high fluoride waste water treatment direction, including the medicine system that communicates in proper order, thoughtlessly congeal adsorption system and flocculation and precipitation system. The utility model discloses an in the charge system, successively added the higher CaCl of solubility
2And Na
3PO
4And (4) removing fluorine. Then in a coagulating sedimentation system, activated carbon and Al (OH)
3The mixed coagulant of (1) can remove residual F
‑And meanwhile, most of organic fluorine-containing compounds can be removed through adsorption. Compared with the conventional single additionThe system has high removal rate of fluorine-containing compounds, obviously reduces the dosage of medicaments and the yield of sludge, does not obviously improve the overall cost, and achieves the aim of deeply treating the high-fluoride wastewater.
Description
Technical Field
The utility model relates to a pollutant processing technology field, concretely relates to handle high fluoride effluent system.
Background
At the present stage, the content of F in the discharged wastewater of various fluorine chemical enterprises seriously exceeds the standard. The reason is that such waste water contains F in high concentration
-In addition, the compound also contains a large number of different kinds of organic aromatic fluorine-containing compounds, including fluorotoluene, trifluorotoluene, fluorobenzaldehyde, fluorobenzoic acid, fluoropyridine and the like. Due to F
-Are stable and difficult to be utilized by microorganisms, and therefore, for the treatment of such wastewater, physical adsorption is generally employed. However, due to the conventional physical adsorption method, the used adsorption material is usually activated carbon, the adsorption efficiency is effective, and the regeneration is difficult. Therefore, frequent replacement of the adsorbent is often required, which also results in a significant increase in the cost of disposal. Therefore, in order to reduce the treatment cost, it is necessary to develop a novel method for treating fluorine-containing wastewater.
At present, the following methods are mainly used for removing the F-containing pollutants in the wastewater:
(1) adsorption method. The method is to transfer the F-containing contaminants to the pores of a macroporous material (mainly activated carbon) to achieve the purpose of removing the contaminants. The technology is simple, the cost is low, and the wastewater with complex pollutant components can be treated. However, because the pores of the adsorbent are limited, the adsorbent is not adsorbed any more after saturation of adsorption, so that the removal efficiency is limited. Furthermore, since such materials are difficult to regenerate after adsorption of F-containing contaminants, they are usually fed continuously, which in turn leads to a simultaneous increase in costs.
(2) Precipitation method. The method is characterized in that slaked lime (Ca (OH) is added into the wastewater
2) Or quicklime (CaO), to F
-With Ca
2+Combining to form calcium fluoride (CaF) insoluble in water
2) Thereby achieving removal of F
-The purpose of (1). The method uses cheap agent, but has low lime solubility, and the generated CaF
2The lime particles are easy to coat, so that the reaction efficiency is low, the lime consumption is large, and the sludge production is large. In addition, if Cl is present in the wastewater
-、SO
4 2-Plasma, due to the presence of salt effects, can cause CaF
2Increased solubility, resulting in F
-The removal rate decreases.
A coagulation method. The method is similar to precipitation method, and mainly comprises adding aluminum salt or polyaluminium, PAC or PAM into wastewater, and generating AlF through complexation-adsorption
X(OH)
3-XCoagulating and precipitating to remove F
-The purpose of (1). Compared with the precipitation method, the method has high efficiency and small sludge amount, but the medicament cost is correspondingly improved. The aluminum salt added at the same time can cause the Al of the effluent
3+And (4) exceeding the standard.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the shortcomings of the prior art and provide a system for treating high fluoride wastewater.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a system for treating high fluoride wastewater comprises a dosing system, a coagulation adsorption system and a flocculation precipitation system, wherein a calcium-containing medicament and a precipitator medicament are sequentially added; according to the high fluoride wastewater treatment direction, the dosing system, the coagulation adsorption system and the flocculation precipitation system are communicated in sequence.
The system of the utility model is used for treating the high fluoride wastewater, F
-The concentration is 50mg/L, and the COD concentration is 500 mg/L. The wastewater first enters a dosing system for treatment, and most of F in the wastewater is removed by adding a calcium-containing medicament
-. The reactions that occur are as follows:
Ca
2++2F
-CaF
2↓；
since the reaction is actually reversible and salt effects due to other ions present in the water are present, the reaction will move in the reverse direction, which in turn leads to F
-The removal rate of (2) is reduced from the actual removal rate. Therefore, to eliminate this effect while further increasing F
-The removal rate of (2) requires the addition of other agents. In fact, the utility model discloses a charge system adds the precipitant, it can with remaining F
-And Ca
2+Interact to form a compound with lower solubilityThe precipitate is formed by the precipitation of the mixture,
the utility model discloses a medicine system adds calcium-containing medicament because of adding earlier, after waiting to react, adds the precipitant again, can not add both simultaneously, prevents PO
4 3-Directly with Ca
2+Reaction precipitation to result in F
-Cannot be sufficiently removed. After the wastewater is treated by a dosing system, about 66-75 percent of F in the wastewater
-Is removed by precipitation, and the remaining F is removed completely
-And residual fluorine-containing organic matters need to be treated by a coagulation and adsorption system for further precipitation treatment. The effluent after the treatment has the F-concentration of 7.5mg/L and the COD concentration of 80 mg/L. Because excessive precipitator is added in the treatment process of dosing treatment, in order to thoroughly remove the excessive precipitator and ensure that the P of the effluent reaches the standard, a flocculation precipitation system is added behind the coagulation adsorption system, and the system removes the precipitator by a flocculation-precipitation method through adding a flocculating agent.
Preferably, the dosing system comprises a first dosing device, a reaction tank and a second dosing device; the first dosing device comprises a first medicine box, a first medicine feeding pipe and a first dosing pump, the first medicine box is a calcium-containing medicine box, and the first medicine feeding pipe is connected with the first medicine box and the reaction tank; the second medicine adding device comprises a second medicine box, a second medicine feeding pipe and a second medicine adding pump, and the second medicine box comprises Na
3PO
4A medicine chest; na (Na)
3PO
4The medicine chest is communicated with the reaction tank through a second medicine feeding pipe.
The utility model discloses in high fluoride waste water gets into to the retort, the calcium chloride in the calcium chloride medical kit is carried to the retort reaction stirring 20min, after waiting to react, closes first valve, first dosing pump and opens, opens and connects Na
3PO
4And a second dosing pump and a second valve of the medicine box are stirred and react for 30min, after the reaction is finished, the precipitate is discharged into a sludge tank through a drain pipe at the bottom, and the treated wastewater enters the flocculation precipitation system through a water outlet to be purified again.
In practice, the added agent is sodium phosphate (Na)
3PO
4) Which may be reacted with the remainder of F-and Ca
2+Interact to form a compound with lower solubilityCalcium fluorophosphate (Ca)
10(PO
4)
6F
2) The reaction that takes place is as follows:
10Ca
2++2F
-+6PO
4 3-＝Ca
10(PO
4)
6F
2↓；
further, Ca
2+Can also be combined with PO
4 3-Act to form insoluble calcium phosphate (Ca)
3(PO
4)
2) Precipitation, the reaction taking place is as follows:
3Ca
2++2PO
4 3-＝Ca
3(PO
4)
2↓；
preferably, the second medicine box further comprises a PAC medicine box, a PAM medicine box; and the PAC medicine box and the PAM medicine box are communicated with the reaction tank through a second medicine feeding pipe. In a preferred scheme, in order to accelerate the precipitation speed, a precipitator Na is added
3PO
4Meanwhile, a PAC medicine box or a PAM medicine box can also be arranged;
preferably, the coagulation adsorption system comprises a coagulation adsorption tank, a stirring device and a coagulant dosing box, wherein a water inlet of the coagulation adsorption tank is communicated with a water outlet of the dosing system, the stirring device is arranged in the coagulation adsorption tank, the coagulant dosing box is communicated with a medicine inlet of the coagulation adsorption tank, and the coagulant dosing box is activated carbon and Al (OH) in a mass ratio of 3:1-4:1
3The mix kit of (1). The coagulant in the coagulation adsorption system of the utility model is active carbon and Al (OH)
3Wherein the activated carbon acts primarily to adsorb F
-And fluorine-containing organic substance, Al (OH)
3The function of (1) is mainly used for accelerating the sedimentation speed, and simultaneously, can also be used for F
-A complex reaction occurs to increase F
-The following reactions occur:
Al(OH)
3+xF
-＝AlF
x(OH)
3-x↓+xOH
-；
preferably, the flocculation and precipitation system comprises a flocculation and precipitation tank, a stirring device and a flocculating agent dosing box, wherein a water inlet of the flocculation and precipitation tank is communicated with a water outlet of the coagulation and adsorption system, and the stirring device is arranged in the flocculation and precipitation tankAnd the flocculant dosing tank is communicated with a drug inlet of the flocculation precipitation tank and is a polymeric ferric sulfate dosing tank. The system adds polymeric ferric sulfate to prepare PO
4 3-Removed by flocculation-precipitation.
Preferably, the reaction tank comprises a tank body, a stirring device and a sewage discharge pipe, wherein the top end of the tank body is respectively provided with a water inlet and a medicine inlet, the tank body is also provided with a water outlet, and the bottom end of the tank body is provided with a sewage discharge outlet; the first medicine feeding pipe and the second medicine feeding pipe are respectively connected with a medicine inlet of the first medicine feeding pipe.
Preferably, the system is still including producing water pitcher, sludge impoundment, flocculation and precipitation system delivery port and producing water pitcher intercommunication, medicine system, coagulation and adsorption system, flocculation and precipitation system's bottom is connected with the sludge pipe, and the blow off pipe is connected with the sludge impoundment.
The utility model discloses produced mud in medicine system, coagulation adsorption system and flocculation and precipitation system all concentrates the collection, and outward transport is handled afterwards, and conventional single-stage medicine system is compared to its production, has reduced 40% -50%.
Preferably, the first medicine feeding pipe is provided with a first valve and a first medicine adding pump; the second medicine feeding pipe is respectively provided with a second medicine feeding pump and a second valve.
Preferably, agitating unit includes stirring rake, (mixing) shaft, motor and vibration damping mount, and the vibration damping mount is fixed to be set up on jar body top, the (mixing) shaft passes vibration damping mount and stretches into jar internal portion, sets up the motor on the vibration damping mount, the output shaft and the (mixing) shaft fixed connection of motor, the stirring rake sets up along (mixing) shaft length direction interval.
The beneficial effects of the utility model reside in that: the utility model discloses an in the charge system, successively added the higher CaCl of solubility
2And Na
3PO
4And the fluorine removal avoids the problems of low removal rate and large medicament dosage caused by adding lime with low solubility. Then in a coagulating sedimentation system, activated carbon and Al (OH)
3The mixed coagulant of (1) can remove residual F
-And simultaneously can remove most of organic fluorine-containing compounds through adsorptionA compound (I) is provided. Compared with the conventional single-dosing or coagulation fluorine removal system, the multi-stage fluorine removal system has higher removal rate of fluorine-containing compounds, and the dosage of chemicals and the sludge yield are obviously reduced. Without a significant increase in overall cost. The system replaces a single system with a multi-level dosing system, deeply removes fluorine-containing compounds in the wastewater, simultaneously reduces the dosage of medicaments and the yield of sludge as much as possible, saves the cost and achieves the aim of deeply treating the high-fluoride wastewater.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a drug administration system according to embodiment 2 of the present invention;
FIG. 3 is a schematic structural diagram of a coagulation adsorption system and a flocculation precipitation system in example 2 of the present invention.
In the figure: 1. a dosing system; 10. the system comprises a pipeline 11, a first medicine adding device 111, a first medicine box 112, a first medicine conveying pipe 113, a first valve 114 and a first medicine adding pump; 12. the reaction tank comprises a reaction tank body 121, a tank body 122, a water inlet 123, a medicine inlet 124, a water outlet 125, a sewage outlet 126, a three-way pipe 127, a stirring paddle 128, a stirring shaft 129, a motor 120 and a damping base; 13. a second dosing device, 131, a second medicine box, 1311, Na3PO4, 1312, PAC, 1313, PAM; 132. a second medicine delivery pipe 133, a second medicine adding pump, and a second valve 134; 2. a coagulation adsorption system 21, coagulation adsorption tanks 21 and 22, a coagulant dosing tank 211, a coagulation adsorption system water inlet 212, a coagulant inlet 213, a coagulation adsorption system water outlet 23, a coagulation adsorption system sewage outlet 221, a coagulant pipe 222, a coagulant dosing pump 223 and a third valve; 3. a flocculation precipitation system 31, a flocculation precipitation tank 311, a flocculation precipitation system water inlet 312, a flocculant medicine inlet 313, a flocculation precipitation system water outlet 314 and a flocculation precipitation system sewage outlet; 32. a flocculant dosing tank 321, flocculant pipes 322, a flocculant dosing pump 323 and a fourth valve; 4. a water production tank 5 and a sludge pipe; 6. a sludge tank; 7. and (4) controlling the valve.
Detailed Description
For better illustrating the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following embodiments.
Example 1
The utility model discloses an embodiment of a system for handle high fluoride waste water, as shown in figure 1, the utility model discloses a system for handling high fluoride waste water is according to high fluoride waste water treatment direction, including the medicine system 1 that loops through pipeline 10 intercommunication, the adsorption system 2 that thoughtlessly congeals, flocculation and precipitation system 3, product water jar 4, high fluoride waste water is through medicine system 1, the adsorption system 2 that thoughtlessly congeals, flocculation and precipitation system 3 handles the back, and product water gets into in the product water jar 4, medicine system 1, and the adsorption system 2 that thoughtlessly congeals, the mud that flocculation and precipitation system 3 produced passes through sludge pipe 5 and gets into sludge impoundment 6, transports outward again and handles, accomplishes the purification treatment of high fluoride waste water. And a control valve 7 is arranged on a connecting pipeline between the adjacent devices.
The medicaments added in the dosing system 1 in the embodiment are calcium-containing medicaments of calcium chloride and sodium phosphate, and PAC or PAM is added while the sodium phosphate is added; the coagulating sedimentation agent of the coagulating adsorption system 2 is active carbon and Al (OH)
3The mass ratio of the two is 3:1-4: 1; the flocculating agent added into the flocculation precipitation system 3 is polymeric ferric sulfate; the medicine system 1 that this embodiment relates to, thoughtlessly congeal adsorption system 2, flocculation and precipitation system 3's structure adopts prior art to realize.
When the system for treating high fluoride waste water described in the embodiment is used, the high fluoride waste water to be treated, F thereof
-The concentration is 50mg/L, and the COD concentration is 500 mg/L. The wastewater firstly enters a dosing system 1 and reacts for 30min by adding a calcium-containing medicament, CaCl
2The addition amount of (a) is 1.2 times of the calculated theoretical amount; removing most of F
-. In order to improve the reaction efficiency and reduce the dosage of the medicament and the generation amount of the sludge, the calcium-containing medicament added into the system is calcium chloride (CaCl) with higher solubility and relatively low price
2) And not quicklime or slaked lime, which is commonly used at present. The reactions that occur are as follows:
Ca
2++2F
-□CaF
2↓
the reaction is actually reversible, and due to the salt effect caused by other ions in water, the reaction can move to the reverse reaction direction, and CaCl is reduced
2In turn leads to F
-The removal rate of (2) is reduced from the actual removal rate. Therefore, to eliminate this effect while further increasing F
-The removal rate of (2) requires the addition of other agents. In practice, the added agent is sodium phosphate (Na)
3PO
4) Reaction for 30min, Na
3PO
4The addition amount of (a) is 1.4 times of the calculated theoretical amount; which may be associated with the remainder of F
-And Ca
2+Interact to form calcium fluorophosphate (Ca) with lower solubility
10(PO
4)
6F
2) The reaction that takes place is as follows:
10Ca
2++2F
-+6PO
4 3-＝Ca
10(PO
4)
6F
2↓；
further, Ca
2+Can also be combined with PO
4 3-Act to form insoluble calcium phosphate (Ca)
3(PO
4)
2) Precipitation, the reaction taking place is as follows:
3Ca
2++2PO
4 3-＝Ca
3(PO
4)
2↓；
for the above reasons, the CaCl is added into the dosing system 1 during operation
2After the reaction is finished, adding Na
3PO
4Both can not be added simultaneously to prevent PO
4 3-Directly with Ca
2+Reaction precipitation to result in F
-Cannot be sufficiently removed. In addition, in order to accelerate the precipitation speed, PAC or PAM is added at the same time when the precipitant is added.
After the wastewater is treated by the chemical adding system 1, about 66-75 percent of F in the wastewater
-Is removed by precipitation, and the remaining F is removed completely
-And residual fluorine-containing organic matters need to be subjected to further precipitation treatment through a coagulation and adsorption system 2. In the embodiment of the utility model, the added coagulant is used for coagulationAdsorbing for 45min, wherein the consumption of the coagulant is about 1.5 times of the theoretical calculation amount; the coagulant is active carbon and Al (OH)
3The mass ratio of the two is 3:1-4: 1. Wherein the active carbon is mainly used for adsorbing F
-And fluorine-containing organic substance, Al (OH)
3The function of (1) is mainly used for accelerating the sedimentation speed, and simultaneously, can also be used for F
-A complex reaction occurs to increase F
-The following reactions occur:
Al(OH)
3+xF
-＝AlF
x(OH)
3-x↓+xOH
-；
the effluent treated by the device is F
-The concentration was 7.5mg/L and the COD concentration was 80 mg/L. Because excessive Na is added in the treatment process of the dosing system
3PO
4In order to thoroughly remove the polymeric ferric sulfate and ensure that the P of the effluent reaches the standard, the utility model adds a flocculation precipitation system 3 behind the coagulation adsorption system 2, the system adds polymeric ferric sulfate, and the amount of the flocculation-precipitator polymeric ferric sulfate is 1.2-1.3 times of the theoretical calculation amount; flocculating and precipitating for 45 min; to PO
4 3-Removed by flocculation-precipitation.
In addition, the sludge generated in the dosing system 1, the coagulation adsorption system 2 and the flocculation precipitation system 3 is collected in a centralized way and then transported out for treatment, and the generated amount is reduced by 40-50% compared with the conventional single-stage dosing system.
Example 2
The system for treating high fluoride wastewater of the present embodiment is different from embodiment 1 only in that the chemical adding system 1, the coagulation and adsorption system 2, and the flocculation and precipitation system 3 are implemented by the following structures, and the method for treating wastewater by the system is the same as that of embodiment 1; as shown in fig. 1 ~ 3, the utility model discloses a system of handling high fluoride waste water is according to high fluoride waste water treatment direction, including the charge system 1 that loops through pipeline 10 intercommunication, thoughtlessly congeal adsorption system 2, flocculation and precipitation system 3, product water jar 4, high fluoride waste water is through charge system 1, thoughtlessly congeal adsorption system 2, flocculation and precipitation system 3 handles the back, in product water gets into product water jar 4, charge system 1, thoughtlessly congeals adsorption system 2, the mud that flocculation and precipitation system 3 produced passes through sludge pipe 5 and gets into sludge impoundment 6, carry out outward transport again and handle, accomplish the purification treatment of high fluoride waste water. And a control valve 7 is arranged on a connecting pipeline between the adjacent devices.
The dosing system 1 comprises a first dosing device 11, a reaction tank 12 and a second dosing device 13; the first medicine adding device 11 includes a first medicine box 111 and a first medicine feeding pipe 112, the first medicine box 111 is a medicine box containing calcium, in this embodiment, a calcium chloride medicine box, the first medicine feeding pipe 112 connects the first medicine box 111 with the reaction tank 12, and a first valve 113 and a first medicine adding pump 114 are provided on the first medicine feeding pipe 112 connecting the first medicine box 111 with the reaction tank 12; the second medicine adding device 13 comprises a second medicine box 131, a second medicine feeding pipe 132 and a second medicine adding pump 133, wherein the second medicine box 131 comprises Na
3PO
4Medicine boxes 1311, PAC medicine boxes 1312, PAM medicine boxes 1313. Na (Na)
3PO
4The medicine boxes 1311, the PAC medicine boxes 1312, and the PAM medicine boxes 1313 are connected to the reaction tank 12 through the second medicine feed pipe 132, and one second medicine feed pump 133 and one second valve 134 are provided on the second medicine feed pipe 132 connecting each second medicine box to the reaction tank 12.
The reaction tank 12 comprises a tank body 121 and a stirring device, wherein the top end of the tank body 121 is respectively provided with a water inlet 122 and a medicine inlet 123, the middle part of the tank body 121 is provided with a water outlet 124, and the bottom end of the tank body 121 is provided with a sewage outlet 125; the high fluorine compound wastewater enters the tank body 121 through the water inlet 122 and is respectively connected with the first medicine feeding pipe 112 and the second medicine feeding pipe 132 through the medicine inlet 123 through a three-way pipe 126; the sewage outlet 125 is communicated with a sludge pipe 5, and the sludge enters a sludge tank 6 and is subjected to outsourcing treatment.
The stirring device comprises a stirring paddle 127, a stirring shaft 128, a motor 129 and a damping base 120, wherein the damping base 120 is fixedly arranged at a middle through hole at the top end of the tank body 121, the middle part of the damping base 120 is provided with a through hole, the stirring shaft 128 penetrates through the through hole of the damping base 120, most of load is borne by the damping base 120, and abrasion of gears is greatly reduced; the motor 129 drives the stirring shaft 128 to rotate, and the stirring shaft 128 drives the stirring paddle to rotate, so that the materials are stirred and mixed uniformly.
When the high fluoride-containing wastewater enters the reaction tank 12, the first valve and the first dosing pump are opened, the second dosing pump and the second valve are closed, calcium chloride in the calcium chloride medicine box is conveyed to the reaction tank 12 to be reacted and stirred for 20min, and CaCl of the calcium chloride
2The addition amount of (a) is 1.2 times of the calculated theoretical amount; after the reaction is finished, closing the first valve, opening the first dosing pump, and opening the connection Na
3PO
4Stirring and reacting for 30min by a second medicine adding pump and a second valve of the medicine box 1311, and reacting for Na
3PO
4The addition amount of (a) is 1.4 times of the calculated theoretical amount; in a preferred scheme, in order to accelerate the precipitation speed, a precipitator Na is added
3PO
4Meanwhile, a second medicine adding pump and a second valve of the PAC medicine box 1312 or the PAM medicine box 1313 can be opened; after the reaction is finished, the sediment is discharged into a sludge tank through a drain pipe at the bottom, and the treated wastewater enters a flocculation precipitation system 3 through a water outlet to be purified again.
The coagulation and adsorption system 2 comprises a coagulation and adsorption tank 21, a stirring device and a coagulant dosing box 22, wherein the top end of the coagulation and adsorption tank 21 is respectively provided with a coagulation and adsorption system water inlet 211 and a coagulant drug inlet 212, the side surface of the coagulation and adsorption tank 21 is provided with a coagulation and adsorption system water outlet 213, and the bottom end of the coagulation and adsorption tank 21 is provided with a coagulation and adsorption system sewage outlet 23; the water inlet 211 of the coagulation adsorption system is communicated with the dosing system 2; the stirring device has the same structure as the stirring device of the dosing system at the set position, and will not be described in detail, and the chemicals in the coagulant dosing tank 22 are activated carbon and Al (OH)
3The mass ratio of the two is 3:1-4: 1; the dosage of the coagulant is about 1.5 times of the theoretical calculation amount; the coagulant adding box 22 is communicated with the medicine inlet of the coagulation adsorption tank 21 through a coagulant pipe 221, and a coagulant adding pump 222 and a third valve 223 are arranged on the coagulant pipe 221; the sewage outlet of the coagulation adsorption tank 21 is communicated with a sludge pipe 5, and the sludge enters a sludge tank 6 and is subjected to outsourcing treatment. The wastewater treated by the dosing system enters the coagulation adsorption system 2 for coagulation adsorption for 45min, and the effluent treated by the deviceOf which F
-The concentration was 7.5mg/L and the COD concentration was 80 mg/L. Because excessive Na is added in the treatment process of the dosing system
3PO
4And in order to thoroughly remove the wastewater and ensure that the P of the effluent reaches the standard, the wastewater enters the flocculation precipitation system 3 again for treatment.
The flocculation sedimentation system 3 comprises a flocculation sedimentation tank 31, a stirring device and a flocculating agent dosing tank 32, wherein the top end of the flocculation sedimentation tank 31 is respectively provided with a flocculation sedimentation system water inlet 311 and a flocculating agent medicine inlet 312, the side surface of the flocculation sedimentation tank 31 is provided with a flocculation sedimentation system water outlet 313, and the bottom end of the flocculation sedimentation tank 31 is provided with a flocculation sedimentation system sewage outlet 314; the water inlet 311 of the flocculation precipitation system is communicated with the water outlet 213 of the coagulation adsorption system; the structure and the set position of the stirring device are the same as those of the stirring device of the dosing system, and the detailed description is omitted, wherein the medicament of the flocculating agent dosing box 32 is polymeric ferric sulfate which is 1.2-1.3 times of the theoretical calculated amount; the flocculant dosing tank 32 is communicated with a dosing inlet of the flocculation settling tank 31 through a flocculant pipe 321, and a flocculant dosing pump 322 and a fourth valve 323 are arranged on the flocculant pipe 321; the sewage outlet of the flocculation precipitation tank 31 is communicated with a sludge pipe 5, and the sludge enters a sludge tank 6 and is subjected to outsourcing treatment. The wastewater treated by the coagulation and adsorption system 2 enters a flocculation and precipitation system 3 for flocculation and precipitation for 45min, and excessive PO is added
4 3-The water is removed by a flocculation-sedimentation method, and the effluent treated by the device enters a water production tank 4.
The dosing system 1, the coagulation adsorption system 2 and the flocculation precipitation system 3 of the embodiment are also applicable to the embodiment 1.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. A system for treating high fluoride wastewater is characterized by comprising a dosing system, a coagulation adsorption system and a flocculation precipitation system, wherein a calcium-containing medicament and a precipitator medicament are sequentially added; according to the high fluoride wastewater treatment direction, the dosing system, the coagulation adsorption system and the flocculation precipitation system are communicated in sequence.
2. The system for treating high fluoride wastewater according to claim 1, wherein the chemical feeding system comprises a first chemical feeding device, a reaction tank and a second chemical feeding device; the first dosing device comprises a first medicine box, a first medicine feeding pipe and a first dosing pump, the first medicine box is a calcium-containing medicine box, and the first medicine feeding pipe is connected with the first medicine box and the reaction tank; the second medicine adding device comprises a second medicine box, a second medicine feeding pipe and a second medicine adding pump, and the second medicine box comprises Na
3PO
4A medicine chest; na (Na)
3PO
4The medicine chest is communicated with the reaction tank through a second medicine feeding pipe.
3. The system for treating high fluoride wastewater of claim 2, wherein said second tank further comprises a PAC tank, a PAM tank; and the PAC medicine box and the PAM medicine box are communicated with the reaction tank through a second medicine feeding pipe.
4. The system for treating high fluoride wastewater according to claim 1, wherein the coagulation adsorption system comprises a coagulation adsorption tank, a stirring device and a coagulant dosing tank, a water inlet of the coagulation adsorption tank is communicated with a water outlet of the dosing system, the stirring device is arranged in the coagulation adsorption tank, the coagulant dosing tank is communicated with a drug inlet of the coagulation adsorption tank, and the coagulant dosing tank is activated carbon and Al (OH) in a mass ratio of 3:1-4:1
3The mix kit of (1).
5. The system for treating high fluoride wastewater according to claim 1, wherein the flocculation system comprises a flocculation precipitation tank, a stirring device and a flocculant dosing tank, a water inlet of the flocculation precipitation tank is communicated with a water outlet of the coagulation adsorption system, the stirring device is arranged in the flocculation precipitation tank, the flocculant dosing tank is communicated with a drug inlet of the flocculation precipitation tank, and the flocculant dosing tank is a polymeric ferric sulfate dosing tank.
6. The system for treating high fluoride wastewater according to claim 2, wherein the reaction tank comprises a tank body, a stirring device and a sewage discharge pipe, the top end of the tank body is respectively provided with a water inlet and a medicine inlet, the tank body is also provided with a water outlet, and the bottom end of the tank body is provided with a sewage discharge outlet; the first medicine feeding pipe and the second medicine feeding pipe are respectively connected with a medicine inlet of the first medicine feeding pipe.
7. The system for treating high fluoride wastewater according to claim 1, further comprising a water production tank and a sludge tank, wherein the water outlet of the flocculation precipitation system is communicated with the water production tank, the bottom ends of the dosing system, the coagulation adsorption system and the flocculation precipitation system are connected with sludge pipes, and the sewage discharge pipe is connected with the sludge tank.
8. The system for treating high fluoride wastewater according to claim 2, wherein the first chemical delivery pipe is provided with a first valve and a first chemical feeding pump; the second medicine feeding pipe is respectively provided with a second medicine feeding pump and a second valve.
9. The system for treating high fluoride wastewater according to any one of claims 4 to 6, wherein the stirring device comprises a stirring paddle, a stirring shaft, a motor and a shock absorption base, the shock absorption base is fixedly arranged at the top end of the tank body, the stirring shaft penetrates through the shock absorption base and extends into the tank body, the motor is arranged on the shock absorption base, an output shaft of the motor is fixedly connected with the stirring shaft, and the stirring paddle is arranged at intervals along the length direction of the stirring shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920594852.6U CN210048587U (en) | 2019-04-26 | 2019-04-26 | System for treating high-fluoride wastewater |
Applications Claiming Priority (1)
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| CN113262805A (en) * | 2021-04-20 | 2021-08-17 | 煤炭科学技术研究院有限公司 | Defluorination catalyst, preparation method thereof and defluorination method |
| CN113262805B (en) * | 2021-04-20 | 2023-09-29 | 煤炭科学技术研究院有限公司 | Defluorination catalyst, preparation method thereof and defluorination method |
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