CN211688567U - Fluorine-containing wastewater treatment system capable of recycling calcium fluoride - Google Patents
Fluorine-containing wastewater treatment system capable of recycling calcium fluoride Download PDFInfo
- Publication number
- CN211688567U CN211688567U CN201921652506.5U CN201921652506U CN211688567U CN 211688567 U CN211688567 U CN 211688567U CN 201921652506 U CN201921652506 U CN 201921652506U CN 211688567 U CN211688567 U CN 211688567U
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- CN
- China
- Prior art keywords
- calcium fluoride
- zone
- fluorine
- containing wastewater
- calcium
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- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 title claims abstract description 45
- 229910001634 calcium fluoride Inorganic materials 0.000 title claims abstract description 45
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 35
- 239000011737 fluorine Substances 0.000 title claims abstract description 35
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 15
- 238000004064 recycling Methods 0.000 title claims description 4
- 239000010802 sludge Substances 0.000 claims abstract description 33
- 239000002351 wastewater Substances 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 21
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 19
- 239000011575 calcium Substances 0.000 claims abstract description 19
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000012716 precipitator Substances 0.000 claims abstract description 11
- 238000002425 crystallisation Methods 0.000 claims abstract description 9
- 230000008025 crystallization Effects 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 17
- 239000008394 flocculating agent Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000005243 fluidization Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000004062 sedimentation Methods 0.000 description 9
- 239000013078 crystal Substances 0.000 description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 229910001628 calcium chloride Inorganic materials 0.000 description 4
- 239000001110 calcium chloride Substances 0.000 description 4
- 235000011148 calcium chloride Nutrition 0.000 description 4
- 239000000701 coagulant Substances 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000011362 coarse particle Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- -1 fluoride ions Chemical class 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The utility model provides a fluoride-containing wastewater treatment system capable of recovering calcium fluoride, which comprises a cylindrical fluidized bed body, wherein the fluidized bed body is sequentially provided with a solid-liquid separation zone, a fluidized crystallization zone, a mixing zone and a calcium fluoride sludge settling zone from the top to the bottom, the bottom of the calcium fluoride sludge settling zone is provided with a sludge discharge pipe, and the middle lower part of the calcium fluoride sludge settling zone is provided with an air inlet pipe; a fluorine-containing wastewater inlet pipe and a calcium-containing precipitator inlet pipe are arranged on the mixing area, and stirring blades are arranged in the mixing area; calcium fluoride sludge settling zone is the circular cone type, the cross section of solid-liquid separation district is greater than the cross section in fluidization state crystallization district, the utility model discloses the calcium fluoride recycle that produces utilizes the compression to advance the air among the sludge settling process for mud is discharged, sets up two fluid water inlet directions when setting up stirring vane, makes the fluid reaction more abundant, does benefit to the formation of coarse grain calcium fluoride.
Description
Technical Field
The utility model relates to the field of environmental protection, especially, relate to a fluoride waste water treatment system of recoverable calcium fluoride.
Background
The waste water discharged from chemical industry, nonferrous metal metallurgy, glass, electronics, electric quilt and other industries often contains high-concentration chloride, which causes fluorine pollution of water environment, and at present, the treatment methods of chlorine-containing waste water at home and abroad mainly comprise a lime neutralization precipitation method and a coagulating precipitation method.
Calcium fluoride is a very fine particulate matter, and due to small specific gravity and low settling rate, coagulants (such as polyaluminium, polyferric and the like) and coagulant aids (such as polyacrylamide and the like) are often required to be added, so that new impurities are introduced, the amount of generated sludge is large, and the content of calcium chloride in the sludge is low. In addition, the currently and generally adopted dosing sedimentation device in China is a common inclined plate sedimentation tank or a vertical flow sedimentation tank, a plate-and-frame filter press is commonly used as a mud-water separation device, and the mud-water separation device needs to be lifted from the sedimentation device to the plate-and-frame filter press through power, so that the method is high in labor operation intensity and only can be operated at intervals. The whole process device has high coagulant and coagulant aid adding cost, the content of the obtained sludge calcium fluoride is low, and effective resource utilization can not be realized.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects and deficiencies of the prior art and provide a fluorine-containing wastewater treatment system which has simple operation, low operation cost and can effectively recover fluorine resources and recover calcium fluoride.
A fluorine-containing wastewater treatment system capable of recovering calcium fluoride comprises a cylindrical fluidized bed body, wherein the fluidized bed body is sequentially provided with a solid-liquid separation zone, a fluidized crystallization zone, a mixing zone and a calcium fluoride sludge settling zone from top to bottom, the bottom of the calcium fluoride sludge settling zone is provided with a sludge discharge pipe, and the middle lower part of the calcium fluoride sludge settling zone is provided with an air inlet pipe; a fluorine-containing wastewater inlet pipe and a calcium-containing precipitator inlet pipe are arranged on the mixing area, a stirring blade is arranged in the mixing area, and a conical baffle is arranged on the stirring blade; the solid-liquid separation zone is provided with a water outlet pipe and a flocculating agent feeding port, and the solid-liquid separation zone is also provided with an inclined plate filler which is arranged at the lower part of the water outlet pipe; the fluorine-containing wastewater inlet water is connected with a fluorine-containing wastewater tank, and a fluorine ion detection device is arranged in the fluorine-containing wastewater tank; the calcium fluoride sludge settling zone is conical, and the cross section of the solid-liquid separation zone is larger than that of the fluidized crystallization zone.
Preferably, the fluorine-containing wastewater inlet pipe and the calcium-containing precipitator inlet pipe are arranged in parallel along the tangential direction of the cross section of the mixing area.
Preferably, the stirring device further comprises a motor, and the stirring blade is connected with the motor through a first-stage transmission shaft and a second-stage transmission shaft;
and the first-stage transmission shaft and the second-stage transmission shaft are in force transmission through a worm gear.
The utility model discloses owing to adopt above technical scheme, make it compare with prior art, have following advantage and positive effect:
1. the utility model provides a fluoride waste water treatment system of recoverable calcium fluoride, the calcium fluoride that produces that deposits under the existence of calcium fluoride crystal seed of fluidization is sand form, and the moisture content is low, and purity is high, can regard as fluorine resource recycle; the air inlet pipe is arranged on the calcium fluoride sludge settling area, so that when the sludge is discharged and meets resistance, compressed air can provide power to help the sludge to be discharged; the mixing of the fluorine-containing wastewater and the calcium-containing precipitator is more uniform through the stirring blades, so that the reaction is more sufficient; through setting up fluoride ion detection device can master in real time fluoride ion concentration in the fluoride waste water, adjust in real time according to this the concentration of calcium-containing precipitant and the addition of flocculating agent, do not waste chemical material under the circumstances of guaranteeing the reaction is abundant.
2. The utility model provides a but fluorine-containing wastewater treatment system of calcium fluoride, owing to detached a large amount of fluoride ions in the fluidized bed, so follow-up flocculating agent quantity of adding is less, and mud production volume is few for waste water treatment integrated cost step-down.
3. The utility model provides a fluoride waste water treatment system of recoverable calcium fluoride, fluoride waste water inlet tube with contain calcium medicament inlet tube and follow the cross section tangential direction parallel arrangement in mixed area makes fluoride waste water with containing calcium medicament forms the whirl in the fluidized bed, promotes its rapid mixing and solid-liquid contact, can restrain the homogeneous nucleation, is favorable to the formation of coarse grain calcium fluoride.
Drawings
The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
fig. 1 is a longitudinal sectional view of the present invention;
fig. 2 is a cross-sectional view of the mixing zone of the present invention.
Detailed Description
The invention will be described in more detail hereinafter with reference to the accompanying drawings showing embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.
As shown in the attached drawings 1-2, the utility model provides a fluoride-containing wastewater treatment system capable of recovering calcium fluoride, which comprises a cylindrical fluidized bed body, wherein the fluidized bed body is sequentially provided with a solid-liquid separation zone 4, a fluidized crystallization zone 3, a mixing zone 2 and a calcium fluoride sludge settling zone 1 from top to bottom, the bottom of the calcium fluoride sludge settling zone 1 is provided with a sludge discharge pipe 5, and the middle lower part of the calcium fluoride sludge settling zone is provided with an air inlet pipe 6; a fluorine-containing wastewater inlet pipe 7 and a calcium-containing precipitator inlet pipe 8 are arranged on the mixing area 2, and a stirring blade 9 is arranged in the mixing area 2; a water outlet pipe 10 is arranged on the solid-liquid separation zone 4, the water outlet pipe 10 is connected with a coagulation sedimentation tank 11, a flocculating agent feeding port 12 is arranged on the coagulation sedimentation tank 11, and a certain amount of flocculating agent is fed into effluent in the coagulation sedimentation tank 11, so that calcium fluoride sludge 17 and discharge water 18 are separated from the effluent; the solid-liquid separation zone 4 is also provided with an inclined plate filler 13, and the inclined plate filler 13 is arranged at the lower part of the water outlet pipe 10; the fluorine-containing wastewater inlet pipe 7 is connected with a fluorine-containing wastewater tank 14, and a fluorine ion detection device 15 is arranged in the fluorine-containing wastewater tank 14; the calcium fluoride sludge settling zone 1 is conical, and the cross section of the solid-liquid separation zone 4 is larger than that of the fluidized crystallization zone.
The calcium fluoride produced by the sedimentation in the presence of the fluidized calcium fluoride crystal seeds is sand-shaped, has low water content and high purity, and can be recycled as fluorine resources; the air inlet pipe 6 is arranged on the calcium fluoride sludge settling area 1, so that when the sludge is discharged and meets resistance, the compressed air can provide power to help the sludge to be discharged; the mixing of the fluorine-containing wastewater and the calcium-containing precipitator is more uniform through the stirring blades 9, so that the reaction is more complete; can grasp the fluoride ion concentration in the fluoride waste water in real time through setting up fluoride ion detection device 15, adjust the concentration that contains calcium precipitant and the addition of flocculating agent in real time in view of the above, do not waste chemical material under the abundant condition of assurance reaction, and because a large amount of fluoride ions have been got rid of in the fluidized bed, so the flocculating agent quantity of follow-up addition is less, and the mud production volume is few for waste water treatment comprehensive cost step-down.
In this embodiment, the fluorine-containing wastewater inlet pipe 7 and the calcium-containing precipitant inlet pipe 8 are arranged in parallel along the tangential direction of the cross section of the mixing zone 2, so that the fluorine-containing wastewater and the calcium-containing reagent form a rotational flow in the fluidized bed, thereby promoting rapid mixing and solid-liquid contact of the fluorine-containing wastewater, inhibiting homogeneous nucleation, and facilitating the generation of coarse calcium fluoride particles.
In this embodiment, the device further comprises a motor 16, the stirring blade 9 is connected with the motor 16 through a first-stage transmission shaft and a second-stage transmission shaft, and a conical baffle 19 is arranged on the stirring blade 9 to prevent the settled flocs from being broken up by the stirring blade 9; the first-stage transmission shaft and the second-stage transmission shaft are in force transmission through the worm gear and the worm, stability and reliability are achieved, and in other embodiments, other force transmission mechanisms can be adopted, such as a bevel gear transmission combination.
The utility model is realized by detecting the content of fluorinion through a fluorinion detection device 15 in the fluorine-containing wastewater tank 14, and setting the addition amount of calcium fluoride crystal seeds, the concentration of calcium-containing precipitator and the dosage of flocculating agent; adding calcium fluoride crystal seeds from the top of a cylindrical fluidized bed, adding fluorine-containing wastewater and a calcium-containing precipitator through a fluorine-containing wastewater inlet pipe 7 and a calcium-containing precipitator inlet pipe 8 respectively, forming rotational flow in a mixing zone 2, starting a motor 9 to drive stirring blades 7 to stir, accelerating the reaction, combining with crystal seed crystallization precipitation treatment of the fluidized bed, generating coarse particles and fine particles of calcium fluoride, enabling the coarse particles to enter a calcium fluoride sludge settling zone 1, periodically discharging and collecting for recycling, and when the discharge is not smooth, introducing air through an air inlet pipe 6 to provide power for assisting the discharge, so as to prevent blockage; the fine particles enter a solid-liquid separation zone 3, enter a coagulation sedimentation tank 11 from a water outlet after solid-liquid separation, and react with a flocculating agent to separate out flocculated sludge and discharge water, wherein the flocculating agent is preferably polyaluminium chloride, polyferric chloride and polyaluminium sulfate; the calcium-containing precipitator is preferably one or two of powdery lime and calcium chloride, and when the concentration of fluorine single ions in the wastewater is 200-300 mg/L, the mass ratio of CaCl2 or lime to F < - > is 4: 1; when the concentration of fluorine single ions in the wastewater is less than 150mg/L, the adding amount of CaCl2 or lime needs to be increased.
As those skilled in the art will appreciate, the invention may be embodied in many other specific forms without departing from the spirit or scope thereof. Although embodiments of the present invention have been described, it is to be understood that the present invention should not be limited to those precise embodiments, and that various changes and modifications can be effected therein by one skilled in the art without departing from the scope or spirit of the invention as defined by the appended claims.
Claims (3)
1. The fluoride-containing wastewater treatment system capable of recycling calcium fluoride is characterized by comprising a cylindrical fluidized bed body, wherein the fluidized bed body is sequentially provided with a solid-liquid separation zone, a fluidized crystallization zone, a mixing zone and a calcium fluoride sludge settling zone from top to bottom, the bottom of the calcium fluoride sludge settling zone is provided with a sludge discharge pipe, and the middle lower part of the calcium fluoride sludge settling zone is provided with an air inlet pipe; a fluorine-containing wastewater inlet pipe and a calcium-containing precipitator inlet pipe are arranged on the mixing area, a stirring blade is arranged in the mixing area, and a conical baffle is arranged on the stirring blade; the solid-liquid separation zone is provided with a water outlet pipe and a flocculating agent feeding port, and the solid-liquid separation zone is also provided with an inclined plate filler which is arranged at the lower part of the water outlet pipe;
the fluorine-containing wastewater inlet water is connected with a fluorine-containing wastewater tank, and a fluorine ion detection device is arranged in the fluorine-containing wastewater tank;
the calcium fluoride sludge settling zone is conical, and the cross section of the solid-liquid separation zone is larger than that of the fluidized crystallization zone.
2. The calcium fluoride-recoverable fluorine-containing wastewater treatment system according to claim 1, wherein the fluorine-containing wastewater inlet pipe and the calcium-containing precipitant inlet pipe are arranged in parallel along a tangential direction of a cross section of the mixing zone.
3. The fluoride-containing wastewater treatment system capable of recovering calcium fluoride according to claim 1, further comprising a motor, wherein the stirring blade is connected with the motor through a first-stage transmission shaft and a second-stage transmission shaft;
and the first-stage transmission shaft and the second-stage transmission shaft are in force transmission through a worm gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921652506.5U CN211688567U (en) | 2019-09-30 | 2019-09-30 | Fluorine-containing wastewater treatment system capable of recycling calcium fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921652506.5U CN211688567U (en) | 2019-09-30 | 2019-09-30 | Fluorine-containing wastewater treatment system capable of recycling calcium fluoride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211688567U true CN211688567U (en) | 2020-10-16 |
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ID=72770805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921652506.5U Expired - Fee Related CN211688567U (en) | 2019-09-30 | 2019-09-30 | Fluorine-containing wastewater treatment system capable of recycling calcium fluoride |
Country Status (1)
| Country | Link |
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| CN (1) | CN211688567U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115340204A (en) * | 2022-06-28 | 2022-11-15 | 江苏中电创新环境科技有限公司 | Continuous production type defluorination system based on fluidized bed |
-
2019
- 2019-09-30 CN CN201921652506.5U patent/CN211688567U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115340204A (en) * | 2022-06-28 | 2022-11-15 | 江苏中电创新环境科技有限公司 | Continuous production type defluorination system based on fluidized bed |
| CN115340204B (en) * | 2022-06-28 | 2023-11-17 | 江苏中电创新环境科技有限公司 | Continuous production type defluorination system based on fluidized bed |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201016 |