CN114835328A - Rare earth extraction separation wastewater treatment method - Google Patents
Rare earth extraction separation wastewater treatment method Download PDFInfo
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- CN114835328A CN114835328A CN202210629315.7A CN202210629315A CN114835328A CN 114835328 A CN114835328 A CN 114835328A CN 202210629315 A CN202210629315 A CN 202210629315A CN 114835328 A CN114835328 A CN 114835328A
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- 238000000926 separation method Methods 0.000 title claims abstract description 40
- 238000000605 extraction Methods 0.000 title claims abstract description 27
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 27
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 27
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 19
- 239000002351 wastewater Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 17
- 238000011084 recovery Methods 0.000 claims abstract description 12
- 150000003839 salts Chemical class 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000013078 crystal Substances 0.000 claims abstract description 8
- 239000010802 sludge Substances 0.000 claims description 43
- 238000006243 chemical reaction Methods 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 25
- 238000004062 sedimentation Methods 0.000 claims description 21
- 238000005189 flocculation Methods 0.000 claims description 18
- 230000016615 flocculation Effects 0.000 claims description 18
- 230000010355 oscillation Effects 0.000 claims description 14
- 238000005345 coagulation Methods 0.000 claims description 13
- 230000015271 coagulation Effects 0.000 claims description 13
- 239000002244 precipitate Substances 0.000 claims description 12
- 238000001704 evaporation Methods 0.000 claims description 11
- 230000008020 evaporation Effects 0.000 claims description 11
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 229940037003 alum Drugs 0.000 claims description 9
- 238000009300 dissolved air flotation Methods 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 9
- 238000005188 flotation Methods 0.000 claims description 9
- 229910052731 fluorine Inorganic materials 0.000 claims description 9
- 239000011737 fluorine Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 238000006115 defluorination reaction Methods 0.000 claims description 7
- 239000000047 product Substances 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000000701 coagulant Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 150000002500 ions Chemical class 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 239000012452 mother liquor Substances 0.000 claims description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims 2
- 238000010979 pH adjustment Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 48
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000004912 1,5-cyclooctadiene Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/583—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing fluoride or fluorine compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a rare earth extraction separation wastewater treatment method, which relates to the field of rare earth extraction separation and aims to solve the problem that oil, water quality reaching the emission standard and salt generated in the treatment process cannot be recycled after oil and heavy metal are removed in sequence in the use process of the conventional rare earth extraction separation equipment, so that resource waste is caused. This rare earth extraction separation waste water treatment method not only can get rid of the oils in the waste water through deoiling mechanism to the accessible is retrieved to the recovery oil drum, and the inside heavy device that removes that sets up of the device simultaneously can get rid of the heavy metal, and through solid-liquid separator output crystal salt.
Description
Technical Field
The invention relates to the field of rare earth extraction separation, in particular to a rare earth extraction separation wastewater treatment method.
Background
Waste water is generated in the process of extracting and separating the rare earth. The waste water contains a large amount of impurity ions, such as oil, COD, calcium, magnesium, nickel, cobalt, manganese, fluorine and the like, and after the oil and heavy metals are removed in sequence in the use process of the conventional rare earth extraction separation equipment, oils, water quality reaching the emission standard and salts generated in the treatment process cannot be recycled, so that the waste of resources is caused, and the use cost of the rare earth extraction separation waste water treatment equipment is increased.
Aiming at the problem that oils, water quality meeting the emission standard and salts generated in the treatment process can not be recycled after oil and heavy metals are removed in sequence in the use process of the conventional rare earth extraction separation equipment, so that the waste of resources is caused, a rare earth extraction separation wastewater treatment method is provided.
Disclosure of Invention
The invention provides a rare earth extraction separation wastewater treatment method, which solves the problem that the waste of resources is caused by the fact that oils, water quality meeting the emission standard and salts generated in the treatment process cannot be recycled after oil and heavy metals are sequentially removed in the use process of the conventional rare earth extraction separation equipment.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a rare earth extraction separation effluent treatment plant, includes first pH equalizing basin, one side of first pH equalizing basin is provided with the pipe connection and has the deoiling mechanism that is used for carrying out the deoiling, just one side pipe connection of deoiling mechanism has the heavy mechanism of removing, the one side of removing heavy mechanism pipe connection has evaporimeter and solid-liquid separator in proper order.
Preferably, a pipeline on one side of the first pH adjusting tank is connected with a dissolved air flotation tower, the dissolved air flotation tower extends to form two paths, one path is provided with a first recycling barrel, the other path is provided with an inclined plate oil separation tank, the inclined plate oil separation tank extends to form two paths, the other path is provided with a second recycling oil barrel, and the other path is provided with a high-efficiency oil removal reactor.
Preferably, the efficient oil removal reactor extends to form two paths, one path is connected with the second recovery oil barrel, the other path is provided with the differential oscillation demulsification device, the other side of the differential oscillation demulsification device is provided with the compact air flotation device, the compact air flotation device extends to form two paths, one path is connected with the second recovery oil barrel, and the other path is provided with the fiber ball filter tank.
Preferably, remove heavy mechanism including removing heavy reaction tank, remove heavy reaction tank and fibre ball filter-tank tube coupling, just the opposite side tube coupling who removes heavy reaction tank has first coagulating basin, the opposite side tube coupling who hangs down the coagulating basin has first flocculation basin, the opposite side of first flocculation basin is provided with first sludge sedimentation tank.
Preferably, the first sludge sedimentation tank is extended with a sludge pipeline and a clear liquid pipeline, one side of the clear liquid pipeline is connected with a second pH adjusting tank, one side of the sludge pipeline is connected with a sludge concentration tank, the other side of the sludge concentration tank is provided with a compressor, the compressor is extended to form two paths, one path is connected with the de-weighting reaction tank, and the other path is provided with heavy metal sludge recovery.
Preferably, one side of the second pH adjusting tank is provided with a defluorination reaction tank, the other side of the defluorination reaction tank is sequentially connected with a second coagulation tank and a second flocculation tank in a management manner, and the other side of the second flocculation tank is provided with a second sludge sedimentation tank.
Preferably, the second sludge sedimentation tank extends to have clear liquid pipeline and mud pipeline, the mud pipeline is connected with the mud concentration tank, one side of clear liquid pipeline is connected with MVR buffer pool.
Preferably, one side of the MVR buffer pool is connected with a filter, the other side of the filter is connected with an evaporator through a pipeline, the evaporator extends out of two paths, one path is connected with a condensed water treatment system, and the other path is connected with a solid-liquid separator.
Preferably, two groups of pipelines extend out of the solid-liquid separator, one group of pipelines is connected with a drying and packaging system, and the other group of pipelines is connected with a mother liquor drying system.
A rare earth extraction separation wastewater treatment method comprises the following steps;
s1: the wastewater is transported to the inside of the first pH adjusting tank through a pipeline, and is uniformly lifted into the vertical cylindrical dissolved air flotation tower by the wastewater lifting pump after being homogenized and equalized in the first pH adjusting tank;
s2: the wastewater after primary oil removal through air floatation sequentially flows into the inclined plate oil separation tank and the high-efficiency oil removal reactor, and the floating stroke of oil particles in the inclined plate filler is smaller, so that the treatment efficiency of the oil particles is improved; the water outlet end of the high-efficiency oil removal reactor automatically flows to a differential oscillation demulsification device;
s3: carrying out high-frequency high-intensity oscillation on the wastewater through a differential oscillation demulsification device, destroying the stability of emulsified oil, forming floating oil with large particle size, and removing the part of floating oil through a compact air flotation device connected with a pipeline on one side of the floating oil;
s4: the treated wastewater is further deoiled in a fiber ball filter tank and is transported to the interior of a weight removal reaction tank through a pipeline;
s5: adding caustic soda into the weight removal reaction tank, and adjusting the pH value of the reaction tank to a designed value to enable heavy metal ions in the material to generate hydroxide precipitate;
s6: the precipitated materials enter a first coagulation tank and a first flocculation tank in sequence, and the precipitates are formed into alum flocs by adding a coagulant and a flocculant;
s7: at the moment, the materials are transported to a first sludge sedimentation tank, firstly enter a water distribution area at the bottom of the tank, water is uniformly distributed, the water flow speed is reduced, heavy metal wastewater flows upwards along the inclined pipe inclination direction under the diversion effect of the inclined pipe diversion area, enters a sedimentation area, deposited sludge slides downwards along the inclined pipe inclination direction under the action of gravity, meanwhile, the sliding alum blossom is pushed into a sludge concentration tank under the hydraulic effect of the diversion inclined pipe, and the water clarified by the inclined pipe enters a second pH adjusting tank from the upper part of a water purification device.
S8: after the pH value of the material in the second pH adjusting tank is adjusted to a design value, the wastewater enters a defluorination reaction tank; adding a fluorine removal agent into the fluorine removal reaction tank, and forming a fluoride precipitate after full reaction;
s9: the materials are sequentially conveyed to the inside of a second coagulation tank and the inside of a second flocculation tank, and the precipitates are formed into alum flocs by adding a coagulant and a flocculant;
s10: then the material enters a second sludge sedimentation tank, and the material clarified by the inclined tube enters an MVR buffer tank;
s11: the material after handling through MVR buffer pool gets into the filter to handle through the filter, the filter handles and finishes the back and gets into inside and the evaporation of going into the evaporimeter, and the evaporation back magma gets into inside the solid-liquid separator, and separation output crystal salt, and the crystal gets into the finished product temporary storage area chemical examination after carrying out dry packaging, goes into the finished product storehouse after the chemical examination is qualified.
The invention has the beneficial effects that:
1. the inside deoiling device that sets up of the device carries out twice deoiling to waste water to cooperate the recovery oil drum, fully carry out recovery processing to the oils in the waste water.
2. The inside heavy mechanism that removes that sets up of the device is convenient for fully get rid of the heavy metal in the waste water to the cooperation solid-liquid separator separation department salt of crystallizing reduces the device's cost through producing the accessory substance.
In conclusion, the device not only can be through removing oil mechanism with the oils in the waste water and detach to the accessible is retrieved to the recovery oil drum, and the inside heavy device that removes that sets up of the device simultaneously can get rid of the heavy metal to through solid-liquid separator output crystal salt.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
Referring to fig. 1, a rare earth extraction separation wastewater treatment device, wherein one side of a first pH adjusting tank is provided with a deoiling mechanism connected with a pipeline for deoiling, one side of the deoiling mechanism is connected with a de-weighting mechanism connected with a pipeline, one side of the de-weighting mechanism is sequentially connected with an evaporator and a solid-liquid separator by pipelines, one side of the first pH adjusting tank is connected with a dissolved air flotation tower by a pipeline, the dissolved air flotation tower extends out of two paths, one path is provided with a first recycling barrel, the other path is provided with an inclined plate oil separation tank, the inclined plate oil separation tank extends out of two paths, one path is provided with a second recycling barrel, the other path is provided with a high-efficiency oil removal reactor, the high-efficiency oil removal reactor extends out of two paths, one path is connected with the second recycling barrel, the other path is provided with a differential demulsification device, and the other side of the differential oscillation demulsification device is provided with a tight air flotation device, the tight air flotation device extends out of two paths, one path is connected with the second recovery oil barrel, and the other path is provided with a fiber ball filter tank;
the weight removing mechanism comprises a weight removing reaction tank, the weight removing reaction tank is connected with a fiber ball filter tank through a pipeline, the other side of the weight removing reaction tank is connected with a first coagulation tank through a pipeline, the other side of the low coagulation tank is connected with a first flocculation tank through a pipeline, the other side of the first flocculation tank is provided with a first sludge sedimentation tank, the first sludge sedimentation tank extends to form a sludge pipeline and a clear liquid pipeline, one side of the clear liquid pipeline is connected with a second pH adjusting tank, one side of the sludge pipeline is connected with a sludge concentration tank, the other side of the sludge concentration tank is provided with a compressor, the compressor extends to form two paths, one path is connected with the weight removing reaction tank, the other path is provided with heavy metal sludge recovery, one side of a second pH adjusting tank is provided with a fluorine removing reaction tank, the other side of the fluorine removing reaction tank is sequentially connected with a second coagulation tank and a second flocculation tank through management, and the other side of the second flocculation tank is provided with a second sludge sedimentation tank, the second sludge sedimentation tank extends to have clear liquid pipeline and mud pipeline, the mud pipeline is connected with the sludge concentration pond, one side of clear liquid pipeline is connected with the MVR buffer pool, one side of MVR buffer pool is connected with the filter, and the opposite side tube coupling of filter has the evaporimeter, the evaporimeter extends two tunnel, be connected with condensate water processing system all the way, another way is connected with solid-liquid separator, solid-liquid separator extends two sets of pipelines, a set of tube coupling has dry packaging system, another set of tube coupling has mother liquor mummification system.
Example two
A treatment method of the rare earth extraction separation wastewater treatment device based on the embodiment comprises the following steps;
s1: the wastewater is transported to the inside of the first pH adjusting tank through a pipeline, and is uniformly lifted into the vertical cylindrical dissolved air flotation tower by the wastewater lifting pump after being homogenized and equalized in the first pH adjusting tank;
s2: the wastewater after primary oil removal through air floatation sequentially flows into the inclined plate oil separation tank and the high-efficiency oil removal reactor, and the floating stroke of oil particles in the inclined plate filler is smaller, so that the treatment efficiency of the oil particles is improved; the water outlet end of the high-efficiency oil removal reactor automatically flows to a differential oscillation demulsification device;
s3: carrying out high-frequency high-intensity oscillation on the wastewater through a differential oscillation demulsification device, destroying the stability of emulsified oil, forming floating oil with large particle size, and removing the part of floating oil through a compact air flotation device connected with a pipeline on one side of the floating oil;
s4: the treated wastewater is further deoiled in a fiber ball filter tank and is transported to the interior of a weight removal reaction tank through a pipeline;
s5: adding caustic soda into the weight removal reaction tank, and adjusting the pH value of the reaction tank to a designed value to enable heavy metal ions in the material to generate hydroxide precipitate;
s6: the precipitated materials enter a first coagulation tank and a first flocculation tank in sequence, and the precipitates are formed into alum flocs by adding a coagulant and a flocculant;
s7: at the moment, the materials are transported to a first sludge sedimentation tank, firstly enter a water distribution area at the bottom of the tank, water is uniformly distributed, the water flow speed is reduced, heavy metal wastewater flows upwards along the inclined pipe inclination direction under the diversion effect of the inclined pipe diversion area, enters a sedimentation area, deposited sludge slides downwards along the inclined pipe inclination direction under the action of gravity, meanwhile, the sliding alum blossom is pushed into a sludge concentration tank under the hydraulic effect of the diversion inclined pipe, and the water clarified by the inclined pipe enters a second pH adjusting tank from the upper part of a water purification device.
S8: after the pH of the materials in the second pH adjusting tank is adjusted to a design value, the wastewater enters a defluorination reaction tank; adding a fluorine removal agent into the fluorine removal reaction tank, and forming a fluoride precipitate after full reaction;
s9: the materials are sequentially conveyed to the interior of a second coagulation tank and the interior of a second flocculation tank, and the precipitates are formed into alum flocs by adding a coagulant and a flocculant;
s10: then the material enters a second sludge sedimentation tank, and the material clarified by the inclined tube enters an MVR buffer tank;
s11: the material after handling through MVR buffer pool gets into the filter to handle through the filter, the filter handles and finishes the back and gets into inside and the evaporation of going into the evaporimeter, and the evaporation back magma gets into inside the solid-liquid separator, and separation output crystal salt, and the crystal gets into the finished product temporary storage area chemical examination after carrying out dry packaging, goes into the finished product storehouse after the chemical examination is qualified.
The concentrated material of system evaporation, COD, heavy metal ion, calcium magnesium ion, fluorinion can form the enrichment, after the enrichment concentration has been high, can influence the quality of product salt, reduce evaporation efficiency and corrosion apparatus, so the centrifugation mother liquor after the evaporation, need some to be beaten back to the front end and carry out the edulcoration once more, and partial discharge is to single-effect evaporation system, carries out the mummification and handles, thoroughly discharges the system with the impurity that the front end can't get rid of. The impurity concentration of the system is maintained at a stable state, so that the conditions that the quality of salt production is influenced by enrichment, the evaporation efficiency is reduced and equipment is corroded are avoided.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a tombarthite extraction separation effluent treatment plant, includes first pH equalizing basin, its characterized in that, one side of first pH equalizing basin is provided with the pipe connection and has the deoiling mechanism that is used for carrying out the deoiling, just one side pipe connection of deoiling mechanism has the heavy mechanism of removing, the one side of removing heavy mechanism pipe connection has evaporimeter and solid-liquid separator in proper order.
2. The rare earth extraction separation wastewater treatment device according to claim 1, wherein a pipeline on one side of the first pH adjustment tank is connected with a dissolved air flotation tower, the dissolved air flotation tower extends out of two ways, one way is provided with a first recycling barrel, the other way is provided with an inclined plate oil separation tank, the inclined plate oil separation tank extends out of two ways, one way is provided with a second recycling barrel, and the other way is provided with a high-efficiency oil removal reactor.
3. The rare earth extraction separation wastewater treatment device as claimed in claim 2, wherein the high-efficiency oil removal reactor extends to form two paths, one path is connected with the second recovery oil barrel, the other path is provided with a differential oscillation demulsification device, the other side of the differential oscillation demulsification device is provided with a compact air flotation device, the compact air flotation device extends to form two paths, one path is connected with the second recovery oil barrel, and the other path is provided with a fiber ball filter tank.
4. The rare earth extraction separation wastewater treatment device according to claim 3, wherein the weight removal mechanism comprises a weight removal reaction tank, the weight removal reaction tank is connected with a fiber ball filter tank through a pipeline, the other side of the weight removal reaction tank is connected with a first coagulation tank through a pipeline, the other side of the low coagulation tank is connected with a first flocculation tank through a pipeline, and the other side of the first flocculation tank is provided with a first sludge sedimentation tank.
5. The rare earth extraction separation wastewater treatment device according to claim 4, wherein the first sludge sedimentation tank is extended with a sludge pipeline and a clear liquid pipeline, one side of the clear liquid pipeline is connected with the second pH adjusting tank, one side of the sludge pipeline is connected with a sludge concentration tank, the other side of the sludge concentration tank is provided with a compressor, the compressor is extended with two paths, one path is connected with the de-heavy reaction tank, and the other path is provided with heavy metal sludge recovery.
6. The rare earth extraction separation wastewater treatment device according to claim 5, wherein a defluorination reaction tank is arranged on one side of the second pH adjusting tank, a second coagulation tank and a second flocculation tank are sequentially connected to the other side of the defluorination reaction tank in a management manner, and a second sludge sedimentation tank is arranged on the other side of the second flocculation tank.
7. The wastewater treatment device for rare earth extraction and separation as claimed in claim 6, wherein a clear liquid pipeline and a sludge pipeline extend from the second sludge sedimentation tank, the sludge pipeline is connected with a sludge concentration tank, and an MVR buffer tank is connected to one side of the clear liquid pipeline.
8. The wastewater treatment device for rare earth extraction separation according to claim 7, wherein one side of the MVR buffer tank is connected with a filter, the other side of the filter is connected with an evaporator through a pipeline, the evaporator extends out of two paths, one path is connected with a condensed water treatment system, and the other path is connected with a solid-liquid separator.
9. The apparatus of claim 8, wherein the solid-liquid separator extends two sets of pipes, one set of pipes is connected with a drying and packing system, and the other set of pipes is connected with a mother liquor drying system.
10. A method for applying to a rare earth extraction separation wastewater treatment apparatus according to any one of claims 1 to 9, characterized by comprising the steps of;
s1: the wastewater is transported to the inside of the first pH adjusting tank through a pipeline, and is uniformly lifted into the vertical cylindrical dissolved air flotation tower by the wastewater lifting pump after being homogenized and equalized in the first pH adjusting tank;
s2: the wastewater subjected to primary oil removal by air floatation sequentially flows into the inclined plate oil separation tank and the efficient oil removal reactor, and the floating stroke of oil particles in inclined plate packing is smaller, so that the treatment efficiency of the oil particles is improved; the water outlet end of the high-efficiency oil removal reactor automatically flows to a differential oscillation demulsification device;
s3: carrying out high-frequency high-intensity oscillation on the wastewater through a differential oscillation demulsification device, destroying the stability of emulsified oil, forming floating oil with large particle size, and removing the part of floating oil through a compact air flotation device connected with a pipeline on one side of the floating oil;
s4: the treated wastewater is further deoiled in a fiber ball filter tank and is transported to the interior of a weight removal reaction tank through a pipeline;
s5: adding caustic soda into the weight removal reaction tank, and adjusting the pH value of the reaction tank to a designed value to enable heavy metal ions in the material to generate hydroxide precipitate;
s6: the precipitated materials enter a first coagulation tank and a first flocculation tank in sequence, and the precipitates are formed into alum flocs by adding a coagulant and a flocculant;
s7: at the moment, the materials are transported to a first sludge sedimentation tank, firstly enter a water distribution area at the bottom of the tank, water is uniformly distributed, the water flow speed is reduced, heavy metal wastewater flows upwards along the inclined pipe inclination direction under the diversion effect of the inclined pipe diversion area, enters a sedimentation area, deposited sludge slides downwards along the inclined pipe inclination direction under the action of gravity, meanwhile, the sliding alum blossom is pushed into a sludge concentration tank under the hydraulic effect of the diversion inclined pipe, and the water clarified by the inclined pipe enters a second pH adjusting tank from the upper part of a water purification device.
S8: after the pH value of the material in the second pH adjusting tank is adjusted to a design value, the wastewater enters a defluorination reaction tank; adding a fluorine removal agent into the fluorine removal reaction tank, and forming a fluoride precipitate after full reaction;
s9: the materials are sequentially conveyed to the inside of a second coagulation tank and the inside of a second flocculation tank, and the precipitates are formed into alum flocs by adding a coagulant and a flocculant;
s10: then the material enters a second sludge sedimentation tank, and the material clarified by the inclined tube enters an MVR buffer tank;
s11: the material after handling through MVR buffer pool gets into the filter to handle through the filter, the filter handles and finishes the back and gets into inside and the evaporation of going into the evaporimeter, and the evaporation back magma gets into inside the solid-liquid separator, and separation output crystal salt, and the crystal gets into the finished product temporary storage area chemical examination after carrying out dry packaging, goes into the finished product storehouse after the chemical examination is qualified.
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