CN202542982U - Vanadium pentoxide waste water treating and resource recycling device - Google Patents
Vanadium pentoxide waste water treating and resource recycling device Download PDFInfo
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- CN202542982U CN202542982U CN 201220166958 CN201220166958U CN202542982U CN 202542982 U CN202542982 U CN 202542982U CN 201220166958 CN201220166958 CN 201220166958 CN 201220166958 U CN201220166958 U CN 201220166958U CN 202542982 U CN202542982 U CN 202542982U
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Abstract
The utility model discloses a vanadium pentoxide waste water treating and resource recycling device, which relates to industrial waste water treatment and resource recycling. The utility model provides a device for treating and recycling waste water produced in production of vanadium pentoxide by combining a reverse osmosis technology with an electro-osmosis technology, which is used for fundamentally solving the problem of pollution of vanadium pentoxide, saving tape water using amount and lowering the water consumption of unit product by recycling waste water, lowering the consumption of sodium chloride serving as a raw material for producing vanadium pentoxide by recovering high-concentration sodium salt waste water, and finally realizing zero discharge of waste water pollutants. The device is provided with an adjusting pond, a reduction reaction pond, a neutralization reaction pond, a precipitating pond, a filtering device, an active carbon adsorption device, a middle pond, a low-pressure reverse osmosis system, a high-pressure reverse osmosis system, an electro-osmosis system, a sludge pond and a sludge dehydration device.
Description
Technical field
The utility model relates to a kind of Industrial Wastewater Treatment and resource circulation utilization, especially relates to a kind of wastewater treatment and resource circulation utilization device of Vanadium Pentoxide in FLAKES.
Background technology
Vanadium Pentoxide (V
2O
5) of many uses, can be used to make the ferro-vanadium steel, in ammonia synthesizing industry, play decarburization, desulfurization and catalyst action, be the coloured material of printing and dyeing, pottery, the inhibiter of equipment anticorrosion in the petrochemical unit also is the raw material of preparation vanadium compound.The traditional technology of producing Vanadium Pentoxide in FLAKES is:
Mining → ore dressing → fragmentation, pulverizing → batch mixing → system ball → roasting → water logging → clearly heavy → IX → heavy thick vanadium → filtration → ammonium sink-calcining → product
The waste water of producing Vanadium Pentoxide in FLAKES mainly is vanadium wastewater, derives from roasting grog leaching process.The leaching method that adopts in the production process is blanket sodium salt roasting clinker water logging.Except the soluble compound dissolving of vanadium, some soluble impurity ions that generate in the sodium roasting process are like Fe in leaching process
2+, Fe
3+, Cr
3+, Mn
2+, A1
3+, SiO
3 2-And PO
4 3-Dissolved Deng also.Yet these foreign ions under the pH of leach liquor value (being 7.5～9.0 under the normal circumstances), or after adjustment pH value, most of hydrolytic reactions and precipitating in the entering slag.SiO
3 2-And PO
4 3-Generate soluble compound after the hydrolysis, continue to stay in the leach liquor.The vanadium solution that contains through repeatedly washing after soaking has been assembled the higher Na of concentration
+, SS and toxic heavy metal ion, V particularly
5+, Cr
6+Cr
6+The insoluble chromic salts of inhaling the people through respiratory tract rests in the lung tissue for a long time, is one of principal element that causes lung cancer; V can stimulate breathing, digestion and neural system, also can damage skin, heart and kidney, makes skin inflammation occur and causes the abnormalism disease.The vanadium wastewater of sodium method roasting simultaneously contains the ammonia nitrogen of high density; Has the dissolved oxygen that consumes water body; Quicken nutritive substance in the bed mud release, influence water supply source, increase the cost that feeds water, nitrogen compound to human body and biological toxic effect, harm such as body eutrophication appears.It is thus clear that vanadium wastewater is very harmful to environment and human body.Therefore, promote that the Vanadium Pentoxide in FLAKES waste water high-efficiency is handled, the innoxious research and development with the comprehensive utilization gordian technique has great practical significance.
Chinese patent 201010147663.8 discloses the water circulation use method in a kind of Vanadium Pentoxide in FLAKES extraction process, the steps include: a, enters sewage reservoir to the sewage after extracting; B, sewage is carried out reverse osmosis concentration, distill with vaporizer then; Water purification after c, the processing is drained into the water purification water reservoir; D, be used further to the immersion after the roasting to the water purification water reservoir; E, the sewage recycling after extraction enter sewage reservoir.Because the sewage that in leaching process, produces has been carried out recycle, realized sewage zero-discharge, having avoided is environmental pollution caused by discharge, has reduced the water consumption of soaking, water consumption has only original about 2/3.
Chinese patent 200610032557.9 discloses the processing and the full circulation technology thereof of waste water in the Vanadium Pentoxide in FLAKES production.With the tail water of resin absorption vanadium extraction workshop section as leaching workshop section soak the vanadium water, and, in the time of setting, directly recycle ammonium salt vanadium wastewater vanadic salts desorb water as desorb workshop section after replenishing sodium-chlor; In tail water, add iron sulphide breeze and sodium sulphite then, in vanadium wastewater, add lime and sodium sulphite, stirring, quiescent setting will continue to recycle by last method the stillness of night; With above processing and circulation through repeatedly, cause having accumulated the high density sodium salt and fly waste water and be drained into in the salt system ball workshop section brine tank, use as salt solution with salt system ball workshop section.This technology had both solved is the pollution problem of tail water and vanadium wastewater during Vanadium Pentoxide in FLAKES is produced, and the sodium salt in the waste water is fully used.
Summary of the invention
The purpose of the utility model is to existing Vanadium Pentoxide in FLAKES waste water complicated component, problems such as difficulty of governance is big, qualified discharge is difficult, recycling difficulty; A kind of improvement and recycling utilization device of the Vanadium Pentoxide in FLAKES factory effluent that reverse osmosis technology and electrodialytic technique are combined are provided; Not only fundamentally solve the pollution problem of Vanadium Pentoxide in FLAKES waste water, and pass through the renewable resource utilization of waste water, practice thrift the tap water water consumption; Reduce the water consumption of unit product; And through recovery high density sodium salt waste water, thereby the consumption of minimizing Vanadium Pentoxide in FLAKES raw materials for production sodium-chlor finally realizes the zero release of contaminated wastewater thing.
The utility model is provided with equalizing tank, reduction reaction pond, neutralization reaction pond, settling tank, filtration unit, absorbent charcoal adsorber, middle pond, low pressure reverse osmosis system, high pressure reverse osmosis system, electrodialysis system, sludge sump and sludge dehydration device.
The water-in of said equalizing tank is connected with the Vanadium Pentoxide in FLAKES wastewater outlet; The water outlet of equalizing tank is connected with the water-in in reduction reaction pond; The water outlet in reduction reaction pond is connected with the water-in in neutralization reaction pond; The water outlet in neutralization reaction pond is connected with the water-in of settling tank; The water outlet of settling tank is connected with the water-in of filtration unit, and the sludge outlet of settling tank is connected with sludge sump, is provided with sludge pump between sludge sump and the sludge dehydration device; The water outlet of filtration unit is connected with the water-in of absorbent charcoal adsorber; The water outlet of absorbent charcoal adsorber is connected with the water-in in middle pond, and the water outlet in middle pond is connected with the water-in of low pressure reverse osmosis system, and the water outlet of the dialyzate of low pressure reverse osmosis system is connected with the water-in of regeneration water tank; The water outlet of the liquid concentrator of low pressure reverse osmosis system is connected with the water-in of high pressure reverse osmosis system; The water outlet of the dialyzate of high pressure reverse osmosis system is connected with the water-in of regeneration water tank, and the water outlet of regeneration water tank is connected with the fermentation vat of lixiviate workshop section in the Vanadium Pentoxide in FLAKES production through pipeline, and the water outlet of the liquid concentrator of high pressure reverse osmosis system is connected with the water-in of electrodialysis system; The water outlet of the dialyzate of electrodialysis system is connected through the water-in of water pump with the high pressure reverse osmosis system, and the water outlet of the liquid concentrator of electrodialysis system brine tank with salt system ball workshop section in pipeline and Vanadium Pentoxide in FLAKES production is connected.
The method that adopts the utility model to carry out Vanadium Pentoxide in FLAKES wastewater treatment and resource circulation utilization may further comprise the steps:
Step (1): reduction
Waste water at first gets into equalizing tank; Regulating pondage, balanced water quality are squeezed into the reduction reaction pond by pump then, and in the reduction reaction pond, adding pH regulator agent adjusting pH value is 2～3; After thorough mixing is even; Under acidic conditions, adding reductive agent, is trivalent chromium with the hexavalent chrome reduction in the waste water, through fully flowing into the neutralization reaction pond after the reaction.Said reduction reaction pond is provided with pH regulator agent chemicals dosing plant and reductive agent chemicals dosing plant, and the neutralization reaction pond is provided with the alkali chemicals dosing plant; Said pH regulator agent is a kind of of sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, carbonic acid or acetate, and pH regulator agent the best is a sulfuric acid; Said reductive agent is a kind of of ferrous sulfate, sodium sulfite anhy 96, S-WAT, sodium sulphite or Sulfothiorine.
Step (2): deposition
In the neutralization reaction pond, add alkali; Make the most of heavy metal ion in the waste water generate precipitation of hydroxide; The back inflow settling tank that reacts completely carries out mud-water separation; Sludge settling is sent in the sludge sump through pump and pipeline, in sludge dehydration device, carries out filtering separation at last, and supernatant gets into filtration unit through pipeline.Said alkali is a kind of of lime, sodium hydroxide, sodium hydrogencarbonate, yellow soda ash, Pottasium Hydroxide, hydrated barta or ammoniacal liquor, and alkali the best is a lime.
Step (3): filter
The supernatant of precipitate and separate gained separates through filtration unit, removes the macrobead suspended solid in the waste water.Said filtration unit is a kind of of sand filtering device or multi-medium filtering device; The filtrate of said multi-medium filtering device is silica sand, hard coal and cobble, and filtration velocity is 7.5～20m/h.Multi-medium filtering device WP≤0.6MPa, 0.04MPa≤water feeding pressure≤0.4MPa, back flushing water feeding pressure>=0.15MPa; Inlet outlet pressure differential is 0.01～0.015MPa; Back washing strength is 4～25L/ (sm), and back flushing lasts 3～7min, and the backwash expansion rate is 40%～50%.
Step (4): charcoal absorption
The waste water that filters gained through absorbent charcoal adsorber, is further removed and remained in suspended solid and the heavy metal ion in the waste water, be purified waste water, and pond in the middle of flowing into.
Step (5): low pressure reverse osmosis desalination
Purifying liquid waste in the middle pond pumped into the desalination of low pressure reverse osmosis system get dialyzate A and liquid concentrator B, dialyzate A collects the regeneration water tank, and liquid concentrator B then gets into the high pressure reverse osmosis system.Said low pressure reverse osmosis system is with the purifying liquid waste through the low pressure reverse osmosis desalting treatment of sodium chloride-containing 0.5～2.0%, separates into the liquid concentrator B of dialyzate E and saliferous 1.5～4.0%; In the said low pressure reverse osmosis system reverse osmosis membrane be to the sodium-chlor rejection greater than 96% reverse osmosis membrane, the membrane module rolled membrane module, WP is 15～45bar, working temperature is 20～45 ℃.
Step (6): high pressure reverse osmosis desalination
The liquid concentrator B of low pressure reverse osmosis system desalination gained is pumped into the desalination of high pressure reverse osmosis system get dialyzate C and liquid concentrator D; Dialyzate C and dialyzate A merging enter into the regeneration water tank; Obtain reuse water, and as lixiviate workshop section in producing soak the vanadium water, liquid concentrator D then gets into electrodialysis system.Said high pressure reverse osmosis system is that the low pressure reverse osmosis liquid concentrator B process high pressure reverse osmosis desalination of sodium chloride-containing 1.5%～4.0% is handled, and separates into dialyzate F and the liquid concentrator D that contains sodium salt 4.5%～8.5%; In the said high pressure reverse osmosis system reverse osmosis membrane be to the sodium-chlor rejection greater than 98% reverse osmosis composite membrane, the membrane module rolled membrane module, WP is 15～65bar, working temperature is 20～45 ℃.
Step (7): electrodialysis concentrates
The liquid concentrator D of high pressure reverse osmosis desalination gained gets into electrodialysis system through water pump and concentrates; The dialyzate 3 that produces gets in the high pressure reverse osmosis system of step (6); Continue circular treatment; The liquid concentrator 3 that contains the high density sodium salt then be drained in the Vanadium Pentoxide in FLAKES production with in the salt system ball workshop section brine tank, use as salt solution with salt system ball workshop section, reduce the sodium-chlor add-on.Said electrodialysis system is that the liquid concentrator D that contains sodium salt 4.5%～8.5% with high pressure reverse osmosis system gained separates into dialyzate 3 and the electrodialysis liquid concentrator 3 that contains sodium salt 8.0%～15.5% through electrodialysis; Electrodialytic WV is 50～250V, and strength of current is 1～3A.
The Vanadium Pentoxide in FLAKES production process is: 1. broken, pulverize, 2. make ball, and 3. roasting, 4. lixiviate, 5. heavy clear, 6. IX, 8. 7. precipitation filters, and 9. washs, dries, 10. a plurality of workshop sections such as calcining.
The utility model is that Vanadium Pentoxide in FLAKES waste water is carried out advanced treatment, turns waste into wealth, and when handling Vanadium Pentoxide in FLAKES waste water, makes full use of the sodium salt of waste water middle and high concentration, the device that makes the waste water reclamation recycle.This utility model equipment is simple, and running cost is low, does not produce secondary pollution; And the waste water that contains the high density sodium salt that reclaims can be drained into the system ball with in the brine tank, utilize again as salt solution with salt system ball, regenerated recycle-water can be used as lixiviate workshop section soak vanadium with water circulation use in production technique; Not only can improve resource utilization; Can also thoroughly solve the problem of environmental pollution that discharge of wastewater produces, accomplish the zero release of contaminated wastewater thing, increase economic efficiency.Particularly adopt this device can valuable sodium salt in the Vanadium Pentoxide in FLAKES waste water be reclaimed and utilization again, not only can reduce, can also guarantee the quality product of Vanadium Pentoxide in FLAKES consumption of raw materials.
Description of drawings
Fig. 1 is that the structure of the utility model embodiment is formed synoptic diagram.
Embodiment
The utility model is the design of after the comparative study of composition, character and the existing processing scheme of existing Vanadium Pentoxide in FLAKES factory effluent being goed deep into system, accomplishing to Vanadium Pentoxide in FLAKES wastewater treatment and recycling utilization technology; Through the combination utilization of technologies such as reduction reaction pond, filtration unit, reverse osmosis system, electrodialysis system, thereby form a kind of Vanadium Pentoxide in FLAKES wastewater treatment and resource circulation utilization device and method.
Following embodiment will combine accompanying drawing that the utility model is further described.
Referring to Fig. 1, the utility model embodiment is provided with equalizing tank 1, reduction reaction pond 2, neutralization reaction pond 3, settling tank 4, filtration unit 5, absorbent charcoal adsorber 6, middle pond 7, low pressure reverse osmosis system 8, high pressure reverse osmosis system 9, electrodialysis system 10, sludge sump 11 and sludge dehydration device 12.
The water-in of said equalizing tank is connected with the Vanadium Pentoxide in FLAKES wastewater outlet; The water outlet of equalizing tank 1 is connected with the water-in in reduction reaction pond 2; The water outlet in reduction reaction pond 2 is connected with the import in neutralization reaction pond 3; The water outlet in neutralization reaction pond 3 is connected with the water-in of settling tank 4; The water outlet of settling tank 4 is connected with the water-in of filtration unit 5, and the sludge outlet of settling tank 4 is connected with sludge sump 11, is provided with sludge pump 13 between sludge sump 11 and the sludge dehydration device 12; The water outlet of filtration unit 5 is connected with the water-in of absorbent charcoal adsorber 6; The water outlet of absorbent charcoal adsorber 6 is connected with the water-in in middle pond 7, and the water outlet in middle pond 7 is connected with the water-in of low pressure reverse osmosis system 8, and the water outlet of the dialyzate A of low pressure reverse osmosis system 8 is connected with the water-in of regeneration water tank 14; The water outlet of the 8 liquid concentrator B of low pressure reverse osmosis system is connected with the water-in of high pressure reverse osmosis system 9; The water outlet of high pressure reverse osmosis system 9 dialyzate C is connected with the water-in of regeneration water tank 14, and the water outlet of regeneration water tank 14 is connected with the fermentation vat of lixiviate workshop section in the Vanadium Pentoxide in FLAKES production through pipeline, and the water outlet of high pressure reverse osmosis system 9 liquid concentrator D is connected with the water-in of electrodialysis system 10; The water outlet of electrodialysis system 10 dialyzates 3 is connected through the water-in of water pump 15 with high pressure reverse osmosis system 9, and the water outlet of electrodialysis system 10 liquid concentrators 3 brine tank with salt system ball workshop section in pipeline and Vanadium Pentoxide in FLAKES production is connected.
Below in conjunction with shown in Figure 1, provide the specific embodiment of Vanadium Pentoxide in FLAKES wastewater treatment and resource circulation utilization method.
Embodiment 1
1200 ton per day Vanadium Pentoxide in FLAKES wastewater treatments and resource circulation utilization engineering.
The water quality situation of said Vanadium Pentoxide in FLAKES waste water is as shown in table 1.
The water quality situation of table 1 Vanadium Pentoxide in FLAKES waste water
| Sequence number | Project | Measured value | Sequence number | Project | Measured value |
| 1 | Cr 6+(mg/L) | 2.4 | 5 | The pH value | 7.5 |
| 2 | Cd 2+(mg/L) | 0.3 | 6 | Ammonia nitrogen (mg/L) | 20.4 |
| 3 | V 5+(mg/L) | 5.4 | 7 | As 3+(mg/L) | 0.6 |
| 4 | Muriate (mg/L) | 901 | 8 | SS(mg/L) | 100 |
Step (1): reduction
Waste water is pressed 60m
3The flow velocity of/h gets into equalizing tank 1; Regulating pondage, balanced water quality are squeezed into reduction reaction pond 2 by pump then, and in reduction reaction pond 2, adding the sulphur acid for adjusting pH value is 2～3; After thorough mixing is even; Under acidic conditions, adding the reductive agent ferrous sulfate, is trivalent chromium with the hexavalent chrome reduction in the waste water, through fully flowing into neutralization reaction pond 3 after the reaction.
Step (2): deposition
In neutralization reaction pond 3, add lime; Make the most of heavy metal ion in the waste water produce precipitation of hydroxide; The back inflow settling tank 4 that reacts completely carries out mud-water separation; Sludge settling is sent in the sludge sump 11 through sludge pump 13 and pipeline, in sludge dehydration device 12, carries out filtering separation at last, and supernatant gets into filtration unit 5 through pipeline.
Step (3): filter
The supernatant of precipitate and separate gained separates through filtration unit 5, removes the macrobead suspended matter in the waste water.
Said filtration unit 5 is the multi-medium filtering device, and the filtrate of multi-medium filtering device is silica sand, hard coal and cobble, and filtration velocity is 8～10m/h.Multi-medium filtering device WP is 0.3MPa, and water feeding pressure is 0.1MPa, and the back flushing water feeding pressure is 0.2MPa, and back washing strength is 6～15L/ (sm), and back flushing lasts 5min, and the backwash expansion rate is 45%.
Step (4): charcoal absorption
The waste water that filters gained through absorbent charcoal adsorber 6, is further removed and remained in solid suspension material and the heavy metal ion in the waste water, be purified waste water, and pond 7 in the middle of flowing into.
Step (5): low pressure reverse osmosis desalination
Purifying liquid waste in the middle pond 7 pumped into 8 desalinations of low pressure reverse osmosis system get dialyzate A and liquid concentrator B, dialyzate A collects regeneration water tank 14, and liquid concentrator B then gets into high pressure reverse osmosis system 9.
Step (6): high pressure reverse osmosis desalination
The liquid concentrator B of low pressure reverse osmosis system 8 desalination gained is pumped into 9 desalinations of high pressure reverse osmosis system get dialyzate C and liquid concentrator D; Dialyzate C and dialyzate A merging enter into regeneration water tank 14; Obtain reuse water; And as lixiviate workshop section in producing soak the vanadium water, liquid concentrator D then gets into electrodialysis system 10.The water quality situation of reuse water is seen table 2.
Step (7): electrodialysis concentrates
The liquid concentrator D of high pressure reverse osmosis system 9 desalination gained gets into electrodialysis system 10 through water pump and concentrates; WV is 200V, and strength of current is 2A, and the dialyzate 3 of generation gets in the high pressure reverse osmosis system 9 of step (6) through water pump 15; Continue circular treatment; The liquid concentrator 3 that contains the high density sodium salt then be drained in the Vanadium Pentoxide in FLAKES production with in the salt system ball workshop section brine tank, use as salt solution with salt system ball workshop section, reduce the sodium-chlor add-on.
Table 2 regenerated water quality situation
| Sequence number | Project | Measured value | Sequence number | Project | Measured value |
| 1 | Cr 6+(mg/L) | 0.1 | 5 | The pH value | 7.7 |
| 2 | Cd 2+(mg/L) | 0.02 | 6 | Ammonia nitrogen (mg/L) | 10 |
| 3 | V 5+(mg/L) | 0.5 | 7 | As 3+(mg/L) | 0.02 |
| 4 | Muriate (mg/L) | 5 | 8 | SS(mg/L) | 5 |
Claims (1)
1. Vanadium Pentoxide in FLAKES wastewater treatment and resource circulation utilization device is characterized in that being provided with equalizing tank, reduction reaction pond, neutralization reaction pond, settling tank, filtration unit, absorbent charcoal adsorber, middle pond, low pressure reverse osmosis system, high pressure reverse osmosis system, electrodialysis system, sludge sump and sludge dehydration device;
The water-in of said equalizing tank is connected with the Vanadium Pentoxide in FLAKES wastewater outlet; The water outlet of equalizing tank is connected with the water-in in reduction reaction pond; The water outlet in reduction reaction pond is connected with the water-in in neutralization reaction pond; The water outlet in neutralization reaction pond is connected with the water-in of settling tank; The water outlet of settling tank is connected with the water-in of filtration unit, and the sludge outlet of settling tank is connected with sludge sump, is provided with sludge pump between sludge sump and the sludge dehydration device; The water outlet of filtration unit is connected with the water-in of absorbent charcoal adsorber; The water outlet of absorbent charcoal adsorber is connected with the water-in in middle pond, and the water outlet in middle pond is connected with the water-in of low pressure reverse osmosis system, and the water outlet of the dialyzate of low pressure reverse osmosis system is connected with the water-in of regeneration water tank; The water outlet of the liquid concentrator of low pressure reverse osmosis system is connected with the water-in of high pressure reverse osmosis system; The water outlet of the dialyzate of high pressure reverse osmosis system is connected with the water-in of regeneration water tank, and the water outlet of regeneration water tank is connected with the fermentation vat of lixiviate workshop section in the Vanadium Pentoxide in FLAKES production through pipeline, and the water outlet of the liquid concentrator of high pressure reverse osmosis system is connected with the water-in of electrodialysis system; The water outlet of the dialyzate of electrodialysis system is connected through the water-in of water pump with the high pressure reverse osmosis system, and the water outlet of the liquid concentrator of electrodialysis system brine tank with salt system ball workshop section in pipeline and Vanadium Pentoxide in FLAKES production is connected.
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| CN 201220166958 CN202542982U (en) | 2012-04-19 | 2012-04-19 | Vanadium pentoxide waste water treating and resource recycling device |
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| CN 201220166958 CN202542982U (en) | 2012-04-19 | 2012-04-19 | Vanadium pentoxide waste water treating and resource recycling device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332841A (en) * | 2013-07-05 | 2013-10-02 | 浙江科力尔环保设备有限公司 | Electroosmosis sludge dewatering equipment |
| CN103332844A (en) * | 2013-07-05 | 2013-10-02 | 浙江科力尔环保设备有限公司 | Electroosmosis sludge dewatering equipment |
| CN103880218A (en) * | 2014-03-27 | 2014-06-25 | 湖南大学 | Complete cycle technology of vanadium smelting wastewater |
| CN109112300A (en) * | 2018-11-14 | 2019-01-01 | 攀钢集团钒钛资源股份有限公司 | Improve the method and device of precipitation APV heap density |
| CN111592042A (en) * | 2020-06-12 | 2020-08-28 | 攀钢集团研究院有限公司 | Method for preparing high-purity vanadium pentoxide by ammonium-free vanadium precipitation of vanadium liquid |
| CN112340878A (en) * | 2020-10-23 | 2021-02-09 | 西南石油大学 | Treatment method for standard-reaching discharge of shale gas fracturing flowback fluid |
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2012
- 2012-04-19 CN CN 201220166958 patent/CN202542982U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332841A (en) * | 2013-07-05 | 2013-10-02 | 浙江科力尔环保设备有限公司 | Electroosmosis sludge dewatering equipment |
| CN103332844A (en) * | 2013-07-05 | 2013-10-02 | 浙江科力尔环保设备有限公司 | Electroosmosis sludge dewatering equipment |
| CN103880218A (en) * | 2014-03-27 | 2014-06-25 | 湖南大学 | Complete cycle technology of vanadium smelting wastewater |
| CN109112300A (en) * | 2018-11-14 | 2019-01-01 | 攀钢集团钒钛资源股份有限公司 | Improve the method and device of precipitation APV heap density |
| CN111592042A (en) * | 2020-06-12 | 2020-08-28 | 攀钢集团研究院有限公司 | Method for preparing high-purity vanadium pentoxide by ammonium-free vanadium precipitation of vanadium liquid |
| CN112340878A (en) * | 2020-10-23 | 2021-02-09 | 西南石油大学 | Treatment method for standard-reaching discharge of shale gas fracturing flowback fluid |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20160419 |