CN108103313B - Oily acid mist treatment system and method in hydrometallurgy - Google Patents
Oily acid mist treatment system and method in hydrometallurgy Download PDFInfo
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- CN108103313B CN108103313B CN201810091845.4A CN201810091845A CN108103313B CN 108103313 B CN108103313 B CN 108103313B CN 201810091845 A CN201810091845 A CN 201810091845A CN 108103313 B CN108103313 B CN 108103313B
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- 239000002253 acid Substances 0.000 title claims abstract description 218
- 239000003595 mist Substances 0.000 title claims abstract description 76
- 238000009854 hydrometallurgy Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 22
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000010941 cobalt Substances 0.000 claims abstract description 10
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 164
- 239000012528 membrane Substances 0.000 claims description 134
- 238000000926 separation method Methods 0.000 claims description 129
- 239000007788 liquid Substances 0.000 claims description 104
- 150000003839 salts Chemical class 0.000 claims description 104
- 239000000243 solution Substances 0.000 claims description 75
- 235000019198 oils Nutrition 0.000 claims description 65
- 239000012266 salt solution Substances 0.000 claims description 59
- 150000001868 cobalt Chemical class 0.000 claims description 25
- 238000005406 washing Methods 0.000 claims description 23
- 239000011259 mixed solution Substances 0.000 claims description 22
- 238000011084 recovery Methods 0.000 claims description 21
- 239000000047 product Substances 0.000 claims description 18
- 238000001728 nano-filtration Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 9
- 235000019476 oil-water mixture Nutrition 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 239000012141 concentrate Substances 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 31
- 239000002699 waste material Substances 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 56
- 239000012071 phase Substances 0.000 description 39
- 239000008346 aqueous phase Substances 0.000 description 16
- 230000009286 beneficial effect Effects 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000012946 outsourcing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 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
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/08—Thickening liquid suspensions by filtration
- B01D17/085—Thickening liquid suspensions by filtration with membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/025—Other waste gases from metallurgy plants
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to an oily acid mist treatment system and method in hydrometallurgy, wherein the oily acid mist treatment system in hydrometallurgy comprises: the invention effectively improves the recycling rate of oily acid mist in hydrometallurgy and reduces the waste of cobalt resources.
Description
Technical Field
The invention relates to the field of waste gas treatment, in particular to an oily acid mist treatment system and method in hydrometallurgy.
Background
At present, particles with small part particle size and large viscosity are generated after outsourcing cobalt raw materials are leached, and a large amount of oily acid mist is generated after iron-removing liquid returns into an extraction system in the filtering process of the particles by a workshop filtering process. The following problems mainly exist in the production of the solution from outsourcing of cobalt raw materials to iron removal: waste gas containing oily acid mist is generated in the extraction process, and waste water is formed after alkali is used for neutralization, so that cobalt resource waste and water resource waste are caused, and the waste water treatment difficulty is high, and the cost is high.
Disclosure of Invention
The invention aims to solve the technical problems and provides an oily acid mist treatment system and method in hydrometallurgy for solving at least one of the technical problems.
The technical scheme includes that the oil-containing acid mist treatment system in hydrometallurgy comprises a water washing tower, an oil-water separation tank, a first pump, a first switch valve, a salt and acid separation membrane device, a second pump, a second switch valve, a membrane concentration device and a product storage tank, wherein a water washing liquid outlet of the water washing tower is communicated with an oil-water mixed liquid inlet of the oil-water separation tank through a pipeline, an aqueous liquid outlet of the oil-water separation tank is communicated with a first pump inlet through a pipeline, a first pump outlet is communicated with a salt and acid mixed liquid inlet of the salt and acid separation membrane device through a pipeline, a salt solution outlet of the salt and acid separation membrane device is communicated with a second pump inlet through a pipeline, a concentrated solution outlet of the membrane concentration device is communicated with a product storage tank through a pipeline, a first switch valve is arranged on the pipeline between the salt and acid mixed liquid inlet of the salt and acid separation membrane device and the first pump inlet, and a second switch valve is arranged on the pipeline between the dilute solution inlet of the membrane concentration device and the second pump inlet.
The beneficial effects of the invention are as follows: the method comprises the steps of liquefying oily acid mist to form oil-water mixed liquid through a water washing tower, connecting the water washing tower with an oil-water separation tank, conveying the oil-water mixture to the oil-water separation tank to finish the separation of aqueous phase liquid and oil phase liquid of the oil-water mixture, effectively realizing the recycling of extractant in the oil phase liquid, connecting the oil-water separation tank with a first pump, providing flow power for the aqueous phase liquid in the oil-water separation tank to a salt and acid separation membrane device connected with the first pump, providing required pressure for the separation of salt and acid in the salt and acid separation membrane device of mixed solution of salt and acid, improving the separation efficiency of salt and acid, obtaining higher separation degree, connecting the salt and acid separation membrane device with a second pump, providing required power for the flow of the separated salt solution to the membrane concentration device connected with the second pump, simultaneously, improving the concentration efficiency, helping to obtain higher concentration degree, providing a product storage tank, better concentrating the salt solution, controlling a switch valve after the first pump and a switch, and a wet-on/off valve, and a wet-off valve, realizing the production of the wet-process of the metallurgical oil mist, and the wet-process oil-containing wet-process treatment of the metallurgical mist-containing liquid-containing device.
On the basis of the technical scheme, the invention can be improved as follows.
Further, still include first recycling bin and third ooff valve, first recycling bin is linked together through pipeline and oil phase liquid outlet of oil water separating jar, is provided with the third ooff valve between the pipeline between the oil phase liquid outlet of first recycling bin and oil water separating jar.
The beneficial effect of adopting the further scheme is that: through setting up first recycling bin, the effectual extractant that contains oil in the oily acid mist in the hydrometallurgy is retrieved, is provided with the third ooff valve simultaneously on first recycling bin and oil water separator, has effectually controlled the separation of oil phase liquid and aqueous phase liquid after the oil-water mixed solution separation, has effectively avoided the doping phenomenon with the aqueous phase liquid and the oil phase liquid that produce in the oil phase liquid output process.
Further, an oil-water mixed liquid inlet and a water phase liquid outlet are arranged at the bottom of the oil-water separation tank, and an oil phase liquid outlet is arranged at the upper ends of the oil-water mixed liquid inlet and the water phase liquid outlet.
The beneficial effect of adopting the further scheme is that: through setting up the entry of profit mixed liquor and the export of aqueous phase liquid in the bottom of oil water separating jar, improved the drainage degree of aqueous phase liquid from the oil water separating jar, set up the oil phase liquid export in the upper end of profit mixed liquor entry and aqueous phase liquid export, the effectual principle that has utilized the oil density to be lower than water carries out the separation with the oil phase liquid and discharges, avoids the doping of oil phase liquid and aqueous phase liquid.
Further, the acid recycling device further comprises a second recycling bin and a fourth switching valve, the second recycling bin is communicated with an acid solution outlet of the salt and acid separation membrane device through a pipeline, and the fourth switching valve is arranged between the second recycling bin and the pipeline between the salt and acid solution outlet of the acid separation membrane device.
The beneficial effect of adopting the further scheme is that: through setting up the second recycling bin, the effectual salt that produces oil-containing acid mist separation in the hydrometallurgy is handled and acid solution in the acid separation solution is retrieved, has improved the cyclic utilization number of times of acid solution in the hydrometallurgy, has reduced the waste of acid solution resource, through setting up the fourth ooff valve between second recycling bin and salt and acid separation membrane device, has improved the control of carrying out acid solution discharge again after the salt solution in salt and the acid solution is precipitated completely, avoids salt and acid not separating the emergence of the condition of discharging salt and acid solution after completely.
Further, the membrane concentration device further comprises a third recycling bin and a fifth switch valve, the third recycling bin is communicated with the water outlet of the membrane concentration device through a pipeline, and the fifth switch valve is arranged on the pipeline between the third recycling bin and the water outlet of the membrane concentration device.
The beneficial effect of adopting the further scheme is that: through setting up the third recycling bin, the effectual water that produces in the oily acid mist treatment process of producing in the hydrometallurgy is retrieved and is recycled, has improved the cycle number of times of producing water in the hydrometallurgy, has reduced the waste of the water resource in the hydrometallurgy, through setting up the fifth ooff valve between third recycling bin and membrane enrichment facility, has realized the control of producing water discharge after the salt solution is concentrated.
Further, the membrane concentration device further comprises a concentration sensor and a sixth switch valve, wherein the concentration sensor and the sixth switch valve are sequentially arranged on a pipeline between a concentrated solution outlet of the membrane concentration device and a product storage tank.
The beneficial effect of adopting the further scheme is that: through set up concentration sensor between membrane enrichment facility and produce the water storage tank, can realize the detection to the concentration of the concentrate that membrane enrichment facility handled and obtain, improved the control to concentrate solution concentration, through set up the sixth ooff valve between concentration sensor and produce the water storage tank, can discharge the concentrate solution of concentration as required.
Further, the salt and acid separation membrane device comprises a tank body and a nanofiltration membrane arranged in the tank body, wherein the nanofiltration membrane divides a cavity in the tank body into a mixed liquid cavity and an acid solution cavity, a salt and acid mixed liquid inlet and a salt solution outlet are both arranged on the tank body and are communicated with the mixed liquid cavity, and the acid solution outlet is arranged on the tank body and is communicated with the acid solution cavity.
The beneficial effect of adopting the further scheme is that: through set up the nanofiltration membrane in salt and acid separation membrane device, the nanofiltration membrane has realized effectively intercepting to salt, has realized the passage of acid solution in salt and the acid mixed solution, through setting up the entry and the salt solution export of salt and acid mixed solution on the jar body, has realized that salt does not permeate the nanofiltration membrane and remains in the mixed solution chamber and discharge.
Further, the membrane concentration device comprises a shell and a concentration membrane arranged inside the shell, wherein the concentration membrane divides the cavity inside the shell into a concentration cavity and a filtrate cavity, the dilute solution inlet and the concentrated solution outlet are both arranged on the shell and are communicated with the concentration cavity, and the water outlet is arranged on the shell and is communicated with the filtrate cavity.
The beneficial effect of adopting the further scheme is that: by arranging the concentration membrane in the membrane concentration device, the concentration of the salt solution discharged through the salt and acid separation membrane device can be realized, the salt solution before concentration and the salt solution after concentration are both positioned in the concentration cavity, and the water production is positioned in the filtrate cavity.
Further, the water washing device also comprises a seventh switch valve, and the seventh switch valve is arranged on a pipeline between a water washing liquid outlet of the water washing tower and an oil-water mixed liquid inlet of the oil-water separation tank.
The beneficial effect of adopting the further scheme is that: by arranging the seventh switch valve between the water washing tower and the oil-water separation tank, the control of discharging the oily acid mist after complete hydration is realized, and incomplete liquefaction of the oily acid mist is avoided.
The invention provides a method for treating oily acid mist in hydrometallurgy, which uses an oily acid mist treatment system in hydrometallurgy and specifically comprises the following steps:
1) Hydrated oily acid mist: closing a first switch valve, conveying oily acid mist generated by preparing cobalt-containing solution through hydrometallurgy to a flue gas inlet of a water scrubber, and treating the oily acid mist through the water scrubber to obtain mixed liquid containing an extractant, cobalt salt solution and acid;
2) Separating the mixed solution: conveying the mixed liquid obtained in the step 1) into an oil-water separation tank through a pipeline, standing the mixed liquid until the extractant and the mixed solution containing cobalt salt and acid are in a completely layered state, and sucking the extractant at the upper layer and then keeping the solution in the oil-water separation tank as an aqueous solution containing cobalt salt and acid;
3) Separating the salt solution and the acid solution: opening a first switch valve, closing a second switch valve, starting a first pump to control the pressure in the salt and acid separation membrane device within the range of 2-5MPa, conveying the aqueous solution containing cobalt salt and acid obtained in the step 2) into the salt and acid separation membrane device through a pipeline, and completely discharging the separated acid solution, wherein the solution remaining in the salt and acid separation membrane device is cobalt salt solution;
4) Concentrating a salt solution: closing the first switch valve, opening the second switch valve, starting the second pump to adjust the pressure in the membrane concentration device to 15Mpa, concentrating the cobalt salt solution obtained in the step 3) in the membrane concentration device, discharging the filtered produced water, and conveying the concentrated cobalt salt solution to a product storage tank.
The beneficial effect of adopting above-mentioned scheme: the mixed liquid containing the extractant, the cobalt salt solution and the acid is obtained by liquefying the oily acid mist through the water washing tower, the environmental pollution caused by directly discharging the oily acid mist into the air is effectively reduced, the recycling of the extractant in the oil phase liquid is effectively realized by conveying the mixed liquid into the oil-water separation tank, meanwhile, the mixed aqueous solution containing the cobalt salt and the acid is separated, the mixed solution containing the salt and the acid is conveyed into the salt and acid separation membrane device by opening the first switch valve and closing the second switch valve and starting the first pump, meanwhile, the salt and the acid are separated under the required working pressure by the salt and acid separation membrane device, the salt and acid separation efficiency is improved, the salt solution obtained by the salt and acid separation membrane device is conveyed into the membrane concentration device by closing the first switch valve and opening the second switch valve and starting the second pump, meanwhile, the salt solution concentration is carried out under the required working pressure of the membrane concentration device, the concentration efficiency is improved, the higher concentration degree is facilitated, and the concentrated salt solution is conveyed into the product after the cobalt is stored better.
Drawings
Fig. 1 is a schematic diagram of a system for treating oily acid mist in hydrometallurgy according to the invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. the device comprises a water washing tower, 2, an oil-water separation tank, 3, a salt and acid separation membrane device, 4, a membrane concentration device, 5, a product storage tank, 6, a first recycling bin, 7, a second recycling bin, 8, a third recycling bin, 9, a first pump, 10, a second pump, 11, a third switching valve, 12, a fourth switching valve, 13, a fifth switching valve, 14, a concentration sensor, 15, a mixed liquid cavity, 16, an acid solution cavity, 17, a nanofiltration membrane, 18, a concentration cavity, 19, a filtrate cavity, 20, a concentration membrane, 21, a seventh switching valve, 22, a first switching valve, 23, a second switching valve, 24, a sixth switching valve, 25 and an oily acid mist input device.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Example 1:
as shown in fig. 1, an oily acid mist treatment system in hydrometallurgy in this embodiment includes a water scrubber 1, an oil-water separation tank 2, a first pump 9, a first switch valve 22, a salt and acid separation membrane device 3, a second pump 10, a second switch valve 23, a membrane concentration device 4 and a product storage tank 5, wherein the water scrubber outlet of the water scrubber 1 is communicated with the oil-water mixture inlet of the oil-water separation tank 2 through a pipeline, the water phase liquid outlet of the oil-water separation tank 2 is communicated with the inlet of the first pump 9 through a pipeline, the outlet of the first pump 9 is communicated with the salt and acid mixture inlet of the salt and acid separation membrane device 3 through a pipeline, the salt solution outlet of the salt and acid separation membrane device 3 is communicated with the inlet of the second pump 10 through a pipeline, the concentrate outlet of the second pump 10 is communicated with the dilute solution inlet of the membrane concentration device 4 through a pipeline and the product storage tank 5, a first switch valve 22 is arranged on the pipeline between the salt and acid mixture inlet of the salt and acid separation membrane device 3 and the inlet of the first pump 9, and a dilute solution inlet of the second pump 23 is arranged between the membrane device and the dilute solution inlet of the second pump 23; specifically, the oily acid mist input device 25 is communicated with the water scrubber 1 through a pipeline and is used for conveying the oily acid mist generated by wet cobalt smelting to the water scrubber 1.
The beneficial effects of this embodiment are: the oil-containing acid mist is liquefied through the water washing tower 1 to form oil-water mixed liquid, the water washing tower 1 is connected with the oil-water separation tank 2, the oil-water mixture is conveyed into the oil-water separation tank 2 to finish the separation of water phase liquid and oil phase liquid of the oil-water mixture, the recycling of extractant in the oil phase liquid is effectively realized, the oil-water separation tank 2 is connected with the first pump 9 to provide flowing power for the water phase liquid in the oil-water separation tank 2 to the salt and acid separation membrane device 3 connected with the first pump 9, the required pressure is provided for the separation of salt and acid in the salt and acid separation membrane device 3 by the mixed solution of salt and acid, the separation efficiency of salt and acid is improved, the higher separation degree is obtained, the salt and acid separation membrane device 3 is connected with the second pump 10, the method provides power required by flowing for the separated salt solution to the membrane concentration device 4 connected with the second pump 10, provides necessary pressure required by concentrating the separated salt solution in the membrane concentration device 4, improves concentration efficiency, is beneficial to obtaining higher concentration degree, and effectively controls the circulation of pipelines by arranging the product storage tank 5 for better storing the concentrated salt solution, so that the sectional controllable liquid circulation is realized, and the oily acid mist generated by hydrometallurgy is effectively liquefied and separated, so that environmental pollution is reduced, and recycling of the oily acid mist generated by hydrometallurgy is realized.
Example 2:
as shown in fig. 1, an oily acid mist treatment system in hydrometallurgy in this embodiment includes a water scrubber 1, an oil-water separation tank 2, a first pump 9, a first switch valve 22, a salt and acid separation membrane device 3, a second pump 10, a second switch valve 23, a membrane concentration device 4 and a product storage tank 5, wherein the water scrubber outlet of the water scrubber 1 is communicated with the oil-water mixture inlet of the oil-water separation tank 2 through a pipeline, the water phase liquid outlet of the oil-water separation tank 2 is communicated with the inlet of the first pump 9 through a pipeline, the outlet of the first pump 9 is communicated with the salt and acid mixture inlet of the salt and acid separation membrane device 3 through a pipeline, the salt solution outlet of the salt and acid separation membrane device 3 is communicated with the inlet of the second pump 10 through a pipeline, the concentrate outlet of the second pump 10 is communicated with the dilute solution inlet of the membrane concentration device 4 through a pipeline and the product storage tank 5, a first switch valve 22 is arranged on the pipeline between the salt and acid mixture inlet of the salt and acid separation membrane device 3 and the inlet of the first pump 9, and a dilute solution inlet of the second pump 23 is arranged between the membrane device and the dilute solution inlet of the second pump 23; specifically, the oily acid mist input device 25 is communicated with the water scrubber 1 through a pipeline and is used for conveying oily acid mist generated by wet cobalt smelting to the water scrubber 1; the oil-containing acid mist is liquefied through the water washing tower 1 to form oil-water mixed liquid, the water washing tower 1 is adjacent to the oil-water separation tank 2, the oil-water mixture is conveyed into the oil-water separation tank 2 to finish the separation of the water phase liquid and the oil phase liquid of the oil-water mixture, the recycling of the extractant in the oil phase liquid is effectively realized, the oil-water separation tank 2 is connected with the first pump 9, the water phase liquid in the oil-water separation tank 2 provides flowing power for the salt and acid separation membrane device 3 connected with the first pump 9, the required pressure is provided for the separation of the salt and acid mixed solution of the salt and the acid in the salt and acid separation membrane device 3, the separation efficiency of the salt and the acid is improved, the higher separation degree is obtained, the salt and acid separation membrane device 3 is connected with the second pump 10, the power required by the flowing is provided for the separated salt solution to the membrane concentration device 4, the necessary pressure is provided for the concentration of the separated salt solution in the membrane concentration device 4, the concentration efficiency is improved, the concentration solution is better, the concentration solution is provided with the necessary pressure for the concentration solution, the salt and the acid mist is better in the concentration device, the water-phase mist is recovered through the valve, the open and the water-phase separation valve is controlled, the water mist is opened, the circulating through the water-containing oil mist is reduced, the circulating through the water-containing valve is realized, the circulating through the water-containing oil is well, the circulating the oil is realized, the circulating the oil is recovered through the water-containing oil through the valve is separated through the valve, and the circulating through the water-containing oil, and the oil is separated through the water, and the oil is separated through the oil, and the oil is recovered through the oil and through the oil.
As shown in fig. 1, the oily acid mist treatment system in hydrometallurgy in the embodiment further comprises a first recovery barrel 6 and a third switch valve 11, wherein the first recovery barrel 6 is communicated with an oil phase liquid outlet of the oil-water separation tank 2 through a pipeline, and the third switch valve 11 is arranged between the first recovery barrel 6 and the pipeline between the oil phase liquid outlets of the oil-water separation tank 2; through setting up first recovery bucket 6, the effectual extractant that contains oil in the oily acid mist in the hydrometallurgy is retrieved, is provided with third ooff valve 11 simultaneously on first recovery bucket 6 and oil water separator, the effectual separation of oil phase liquid and aqueous phase liquid after having controlled oil-water mixed solution separation, has effectively avoided the doping phenomenon with the aqueous phase liquid and the oil phase liquid that produce in the oil phase liquid output process.
As shown in fig. 1, in the hydrometallurgy oily acid mist treatment system in the embodiment, an oil-water mixed liquid inlet and an aqueous phase liquid outlet are arranged at the bottom of an oil-water separation tank 2, and an oil phase liquid outlet is arranged at the upper ends of the oil-water mixed liquid inlet and the aqueous phase liquid outlet; through setting up the entry of profit mixed liquor and the export of aqueous phase liquid in the bottom of water oil separating jar 2, improved the row's clarity of aqueous phase liquid from in the water oil separating jar 2, set up the oil phase liquid export in the upper end of profit mixed liquor entry and aqueous phase liquid export, the effectual principle that has utilized the density of oil to be lower than water carries out separation discharge with the oil phase liquid, avoids the doping of oil phase liquid and aqueous phase liquid.
As shown in fig. 1, the oily acid mist treatment system in hydrometallurgy in the embodiment further comprises a second recovery barrel 7 and a fourth switch valve 12, wherein the second recovery barrel 7 is communicated with an acid solution outlet of the salt and acid separation membrane device 3 through a pipeline, and the fourth switch valve 12 is arranged between the second recovery barrel 7 and the pipeline between the acid solution outlets of the salt and acid separation membrane device 3; through setting up second recycling bin 7, effectually retrieve the acid solution in the salt and the sour separation solution that oily acid mist separation treatment produced in the hydrometallurgy, improved the cyclic utilization number of times of acid solution in the hydrometallurgy, reduced the waste of acid solution resource, through setting up fourth switch valve 12 between second recycling bin 7 and salt and sour separation membrane device 3, improved the control of carrying out the acid solution discharge again after the salt solution in salt and the acid solution is precipitated completely, avoid salt and acid not separating the emergence of the condition of discharging salt and acid solution completely after.
As shown in fig. 1, the oily acid mist treatment system in hydrometallurgy in the embodiment further comprises a third recovery barrel 8 and a fifth switch valve 13, wherein the third recovery barrel 8 is communicated with a water outlet of the membrane concentration device 4 through a pipeline, and the fifth switch valve 13 is arranged on the pipeline between the third recovery barrel 8 and the water outlet of the membrane concentration device 4; through setting up third recycling bin 8, the effectual water that produces in the oily acid mist treatment process of producing in the hydrometallurgy is retrieved and is recycled, has improved the cycle number of times of producing water in the hydrometallurgy, has reduced the waste of the water resource in the hydrometallurgy, through setting up fifth ooff valve 13 between third recycling bin 8 and membrane enrichment facility 4, has realized the control of producing water discharge after the salt solution is concentrated.
As shown in fig. 1, the oily acid mist treatment system in hydrometallurgy in the embodiment further comprises a concentration sensor 14 and a sixth switch valve 24, wherein the concentration sensor 14 and the sixth switch valve 24 are sequentially arranged on a pipeline between a concentrated solution outlet of the membrane concentration device 4 and the product storage tank 5; by providing the concentration sensor 14 between the membrane concentration device 4 and the water production tank, the concentration of the concentrated solution processed by the membrane concentration device 4 can be detected, the control of the concentration of the concentrated solution is improved, and the concentrated solution of the concentration can be discharged as required by providing the sixth switch valve 24 between the concentration sensor 14 and the water production tank.
As shown in fig. 1, in the oily acid mist treatment system in hydrometallurgy in this embodiment, the salt and acid separation membrane device 3 includes a tank body and a nanofiltration membrane 17 arranged in the tank body, the nanofiltration membrane 17 divides a cavity in the tank body into a mixed liquor cavity 15 and an acid solution cavity 16, a salt and acid mixed liquor inlet and a salt solution outlet are both arranged on the tank body and are communicated with the mixed liquor cavity 15, and an acid solution outlet is arranged on the tank body and is communicated with the acid solution cavity 16; the nanofiltration membrane 17 is arranged in the salt and acid separation membrane device 3, the nanofiltration membrane 17 effectively intercepts salt, the acid solution in the salt and acid mixed solution passes through, and the salt is discharged without penetrating through the nanofiltration membrane 17 while remaining in the mixed solution cavity by arranging the inlet and the salt solution outlet of the salt and acid mixed solution on the tank body.
As shown in fig. 1, in the hydrometallurgy oil-containing acid mist treatment system in this embodiment, the membrane concentration device 4 includes a housing and a concentration membrane 20 disposed inside the housing, the concentration membrane 20 divides the cavity inside the housing into a concentration chamber 18 and a filtrate chamber 19, a dilute solution inlet and a concentrate outlet are both disposed on the housing and are communicated with the concentration chamber 18, and a produced water outlet is disposed on the housing and is communicated with the filtrate chamber 19; by providing the concentration membrane 20 in the membrane concentration device 4, concentration of the salt solution discharged through the salt and acid separation membrane device 3 can be achieved, both the salt solution before concentration and the salt solution after concentration are located in the concentration chamber 18, and the produced water is located in the filtrate chamber 19.
As shown in fig. 1, the oily acid mist treatment system in hydrometallurgy in the embodiment further comprises a seventh switch valve 21, wherein the seventh switch valve 21 is arranged on a pipeline between a water washing liquid outlet of the water washing tower 1 and an oil-water mixed liquid inlet of the oil-water separation tank 2; by arranging the seventh switch valve 21 between the water washing tower 1 and the oil-water separation tank 2, the control of discharging the oily acid mist after complete hydration is realized, and incomplete liquefaction of the oily acid mist is avoided.
The working process of the embodiment is as follows: opening a switch at the outlet of an oily acid mist input device 25, closing a seventh switch valve 21, spraying water to liquefy oily acid mist generated by hydrometallurgy, opening the seventh switch valve 21 when the oily acid mist is completely generated into oil-water mixed liquid, simultaneously closing a first switch valve 22 and a third switch valve 11, enabling the oil-water mixed liquid to flow into an oil-water separation tank 2 through a pipeline, and when the oil-water mixed liquid is left to stand until oil-phase liquid and water-phase liquid in the oil-water mixed liquid are completely separated, opening the third switch valve 11 to discharge the oil-phase liquid at the upper layer into a first recovery barrel 6, opening the first switch valve 22 and the fourth switch valve 12, closing a second switch valve 23, opening a first pump 9 to convey the water-phase liquid in the oil-water separation device into a mixed liquid cavity 15 of a salt and acid separation membrane device 3, the first pump 9 is used for pressurizing to the working pressure of the salt and acid separation membrane device 3, the acid in the salt and acid mixed solution in the mixed solution cavity 15 completely enters the acid solution cavity 16 and is discharged into the second recycling bin 7, the second switch valve 23 and the fifth switch valve 13 are opened, the sixth switch valve 24 is closed, the second pump 10 is started to convey the salt solution in the mixed solution cavity 15 in the salt and acid separation membrane device 3 into the concentration cavity 18 of the membrane concentration device 4, the working pressure of the membrane concentration device 4 is pressurized by the second pump 10 for concentrating the salt solution, the concentration sensor 14 is used for measuring the concentration of the salt solution in the concentration cavity 18, and when the salt solution reaches the required concentration, the sixth switch valve 24 is opened, and the concentrated solution is discharged into the product storage tank 5.
Example 3:
the method for treating the oily acid mist in the hydrometallurgy in the embodiment uses the oily acid mist treatment system in the hydrometallurgy in the embodiment 1, and specifically comprises the following steps of:
1) Hydrated oily acid mist: the first switch valve 22 is closed, oily acid mist generated by preparing cobalt-containing solution through hydrometallurgy is conveyed to a flue gas inlet of the water scrubber 1, and the oily acid mist is treated by the water scrubber 1 to obtain mixed liquid containing extractant, cobalt salt solution and acid;
2) Separating the mixed solution: conveying the mixed liquid obtained in the step 1) into an oil-water separation tank 2 through a pipeline, standing the mixed liquid until the extractant and the mixed solution containing cobalt salt and acid are in a completely layered state, and sucking the extractant at the upper layer and then keeping the solution in the oil-water separation tank 2 as an aqueous solution containing cobalt salt and acid;
3) Separating the salt solution and the acid solution: opening a first switch valve 22, closing a second switch valve 23, starting a first pump 9 to control the pressure in the salt and acid separation membrane device 3 within a range of 2-5MPa, conveying the aqueous solution containing cobalt salt and acid obtained in the step 2) into the salt and acid separation membrane device 3 through a pipeline, and completely discharging the separated acid solution, wherein the solution remained in the salt and acid separation membrane device 3 is cobalt salt solution;
4) Concentrating a salt solution: closing the first switch valve 22, opening the second switch valve 23, starting the second pump 10 to adjust the pressure in the membrane concentration device 4 to 15Mpa, concentrating the cobalt salt solution obtained in the step 3) in the membrane concentration device 4, discharging the filtered produced water, and conveying the concentrated cobalt salt solution to the product storage tank 5.
The beneficial effects of this embodiment are: the mixed liquid containing the extractant, the cobalt salt solution and the acid is obtained by liquefying the oily acid mist through the water washing tower 1, the environmental pollution caused by directly discharging the oily acid mist into the air is effectively reduced, the recycling of the extractant in the oil phase liquid is effectively realized by conveying the mixed liquid into the oil-water separation tank 2, meanwhile, the mixed aqueous solution containing the cobalt salt and the acid is separated, the mixed solution containing the salt and the acid is conveyed into the salt and acid separation membrane device 3 by opening the first switch valve 22 and closing the second switch valve 23 and starting the first pump 9, meanwhile, the salt and the acid separation membrane device 3 is ensured to separate the salt and the acid under the required working pressure, the efficiency of salt and acid separation is improved, the salt solution obtained by conveying the salt and acid separation membrane device 3 into the membrane concentration device 4 is realized by closing the first switch valve 22 and opening the second switch valve 23, the salt solution obtained by starting the second pump 10 is ensured to concentrate the salt solution under the required working pressure of the membrane concentration device 4, the concentration efficiency is improved, and the concentrated salt solution is facilitated to be obtained by better concentrated into the concentrated salt solution after being conveyed into the cobalt salt solution 5 through the storage tank.
In the description of the present specification, a description referring to terms "embodiment one", "embodiment two", "example", "specific example", or "some examples", etc., means that a specific method, apparatus, or feature described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, methods, apparatus, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (8)
1. The oily acid mist treatment system in hydrometallurgy is characterized by comprising a water washing tower (1), an oil-water separation tank (2), a first pump (9), a first switch valve (22), a salt and acid separation membrane device (3), a second pump (10), a second switch valve (23), a membrane concentration device (4) and a product storage tank (5), wherein a water washing liquid outlet of the water washing tower (1) is communicated with an oil-water mixed liquid inlet of the oil-water separation tank (2) through a pipeline, a water phase liquid outlet of the oil-water separation tank (2) is communicated with an inlet of the first pump (9) through a pipeline, a salt and acid mixed liquid outlet of the first pump (9) is communicated with a salt and acid mixed liquid inlet of the salt and acid separation membrane device (3) through a pipeline, a salt solution outlet of the salt and acid separation membrane device (3) is communicated with an inlet of the second pump (10) through a pipeline, a water washing liquid outlet of the second pump (10) is communicated with a dilute solution inlet of the membrane concentration device (4) through a pipeline, a water phase liquid outlet of the membrane device (4) is communicated with a salt and an acid mixed liquid inlet of the first pump (9) through a salt and an inlet of the first pump (22), a second switch valve (23) is arranged on a pipeline between the dilute solution inlet of the membrane concentration device (4) and the inlet of the second pump (10);
the membrane concentration device further comprises a third recovery barrel (8) and a fifth switch valve (13), wherein the third recovery barrel (8) is communicated with a water outlet of the membrane concentration device (4) through a pipeline, and the fifth switch valve (13) is arranged on the pipeline between the third recovery barrel (8) and the water outlet of the membrane concentration device (4);
the membrane concentration device (4) comprises a shell and a concentration membrane (20) arranged in the shell, wherein the cavity in the shell is divided into a concentration cavity (18) and a filtrate cavity (19) by the concentration membrane (20), the dilute solution inlet and the concentrated solution outlet are both arranged on the shell and are communicated with the concentration cavity (18), and the water outlet is arranged on the shell and is communicated with the filtrate cavity (19).
2. The acid mist treatment system for oil-containing in hydrometallurgy according to claim 1, further comprising a first recovery tank (6) and a third switch valve (11), wherein the first recovery tank (6) is communicated with an oil phase liquid outlet of the oil-water separation tank (2) through a pipeline, and the third switch valve (11) is arranged between the first recovery tank (6) and the pipeline between the oil phase liquid outlets of the oil-water separation tank (2).
3. The acid mist treatment system for oil-containing in hydrometallurgy according to claim 2, wherein the oil-water mixed liquor inlet and the water phase liquid outlet are arranged at the bottom of the oil-water separation tank (2), and the oil phase liquid outlet is arranged at the upper ends of the oil-water mixed liquor inlet and the water phase liquid outlet.
4. An oil-containing acid mist treatment system in hydrometallurgy according to claim 1, further comprising a second recovery tank (7) and a fourth switching valve (12), wherein the second recovery tank (7) is communicated with the acid solution outlet of the salt and acid separation membrane device (3) through a pipe, and the fourth switching valve (12) is provided between the second recovery tank (7) and the pipe between the acid solution outlet of the salt and acid separation membrane device (3).
5. An oil-containing acid mist treatment system in hydrometallurgy according to claim 1, further comprising a concentration sensor (14) and a sixth switching valve (24), the concentration sensor (14) and the sixth switching valve (24) being arranged in sequence on a pipe between a concentrate outlet of the membrane concentration device (4) and the product tank (5).
6. An oil-containing acid mist treatment system in hydrometallurgy according to claim 4, characterized in that the salt and acid separation membrane device (3) comprises a tank body and a nanofiltration membrane (17) arranged in the tank body, the nanofiltration membrane (17) divides a cavity in the tank body into a mixed liquor cavity (15) and an acid solution cavity (16), the salt and acid mixed liquor inlet and the salt solution outlet are both arranged on the tank body and are communicated with the mixed liquor cavity (15), and the acid solution outlet is arranged on the tank body and is communicated with the acid solution cavity (16).
7. An oil-containing acid mist treatment system in hydrometallurgy according to claim 1, further comprising a seventh switch valve (21), the seventh switch valve (21) being arranged on a pipe between a water wash outlet of the water wash column (1) and an oil-water mixture inlet of the oil-water separation tank (2).
8. A method for treating oily acid mist in hydrometallurgy, characterized in that the method uses the oily acid mist treatment system in hydrometallurgy according to any one of claims 1 to 7, and specifically comprises the following steps:
1) Hydrated oily acid mist: closing a first switch valve (22), conveying oily acid mist generated by preparing cobalt-containing solution by hydrometallurgy to a flue gas inlet of the water scrubber (1), and treating the oily acid mist by the water scrubber (1) to obtain mixed liquid containing an extractant, cobalt salt solution and acid;
2) Separating the mixed solution: conveying the mixed liquid obtained in the step 1) into the oil-water separation tank (2) through a pipeline, standing the mixed liquid until the extractant and the mixed solution containing cobalt salt and acid are in a completely layered state, and sucking the extractant at the upper layer and then keeping the solution in the oil-water separation tank (2) as an aqueous solution containing cobalt salt and acid;
3) Separating the salt solution and the acid solution: opening a first switch valve (22), closing a second switch valve (23), starting the first pump (9) to control the pressure in the salt and acid separation membrane device (3) within the range of 2-5MPa, conveying the aqueous solution containing cobalt salt and acid obtained in the step 2) into the salt and acid separation membrane device (3) through a pipeline, and completely discharging the separated acid solution, wherein the solution remained in the salt and acid separation membrane device (3) is cobalt salt solution;
4) Concentrating a salt solution: closing a first switch valve (22), opening a second switch valve (23), starting a second pump (10) to adjust the pressure in the membrane concentration device (4) to 15Mpa, concentrating the cobalt salt solution obtained in the step 3) in the membrane concentration device (4), discharging filtered produced water, and conveying the concentrated cobalt salt solution into the product storage tank (5).
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