CN106115634B - A kind of method for concentrating titanium white waste acid - Google Patents
A kind of method for concentrating titanium white waste acid Download PDFInfo
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- CN106115634B CN106115634B CN201610526752.0A CN201610526752A CN106115634B CN 106115634 B CN106115634 B CN 106115634B CN 201610526752 A CN201610526752 A CN 201610526752A CN 106115634 B CN106115634 B CN 106115634B
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- spent acid
- smoke
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- 239000002253 acid Substances 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 50
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 235000010215 titanium dioxide Nutrition 0.000 title claims abstract description 37
- 239000002699 waste material Substances 0.000 title claims abstract description 35
- 239000007789 gas Substances 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 16
- 239000003546 flue gas Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 239000010962 carbon steel Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 claims description 2
- 239000000295 fuel oil Substances 0.000 claims description 2
- 239000003345 natural gas Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- 239000007788 liquid Substances 0.000 abstract description 10
- 238000009835 boiling Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000007701 flash-distillation Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 4
- 239000003517 fume Substances 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 239000008258 liquid foam Substances 0.000 description 6
- 239000002918 waste heat Substances 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007738 vacuum evaporation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000001038 titanium pigment Substances 0.000 description 2
- 208000003251 Pruritus Diseases 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XBDUTCVQJHJTQZ-UHFFFAOYSA-L iron(2+) sulfate monohydrate Chemical compound O.[Fe+2].[O-]S([O-])(=O)=O XBDUTCVQJHJTQZ-UHFFFAOYSA-L 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Inorganic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The present invention relates to chemical industrial field liquid concentration operating process, specifically a kind of method for concentrating titanium white waste acid, the equipment that this method uses includes：Dilute spent acid pump, air-introduced machine, heat pipe smoke-gas preheater, heat-pipe furnace, blower fan, circulation acid-proof pump, flash tank, water-jet pump.It is will to be pressed into heat pipe smoke-gas preheater containing the titanium white waste acid that acid concentration is 20% or so, heat exchange is carried out with the adopting heat pipes for heat transfer section of fume afterheat heating, dilute spent acid is heated, hot spent acid outlet through heat pipe smoke-gas preheater is sent into heat-pipe furnace, it is heated to more than boiling point in heat-pipe furnace, subsequently into flash tank, happen suddenly " flash distillation ", large quantity of moisture evaporates to form water vapour in dilute spent acid, titanium white waste acid is concentrated to normal concentration, water vapour enters water-jet pump, and water vapour is condensed, and the titanium white waste acid being concentrated is discharged from flash tank concentrated acid outlet.It has the advantages that technical process energy consumption is low, technique is simple and direct, effective, equipment is not easily blocked, is safe and reliable to operation.
Description
Technical field
The present invention relates to chemical industrial field liquid concentration operating process, specifically a kind of method for concentrating titanium white waste acid.
Background technology
In chemical industrial field, there are many liquid charging stocks, semi-finished product to need to concentrate, be processed into product；There are many liquid
Waste material, to the concentration of spent acid, waste liquid, typically all uses the operation of steam heating evaporation to meet the requirement of environmental protection
Journey.
For example, sulfuric acid method titanium pigment production in, most it is scabrous be spent acid effective reuse because being containing acid concentration
20% or so spent acid to account for processing waste 70%, the concentrating and impurity removing treatment for reuse of spent acid or again with always waved in industry no
The serious problems gone and do not received.
The method for making a general survey of domestic and international sulfuric acid method titanium pigment business processes spent acid, it is most important method using waste acid concentration,
Some external Large sulfuric acid method titanium dioxide enterprises are all using concentration method processing spent acid.Waste acid concentration method is exactly to heat spent acid, makes sulphur
Acid concentration increase, is then back to hydrolysis procedure.Concentration method can use submerged combustion and vacuum concentrate methool.Submerged combustion is
The concentration technology of early stage, technical process are caused high-temperature gas (1200 DEG C or so) in a combustion chamber, are injected directly into spent acid,
Make the moisture evaporation of spent acid and play a part of concentrating waste acid, make to be dissolved in the sulfuric acid Asia in spent acid due to the raising of sulfuric acid concentration
Iron is separated out in the form of ferrous sulfate monohydrate, and the sulfuric acid concentration after method concentration is not high, and equipment corrosion is severe, and the former Soviet Union has
Sell after Waste Sulfuric Acid is concentrated into 55% with this method or used for production phosphate fertilizer.Vacuum evaporation, according to its evaporation intensity, dense
Contracting series, 20% or so Waste Sulfuric Acid is concentrated into 40%, 50%, 70% or even more than 90% respectively, the method is state in recent years
The method for concentration that inside and outside titanium dioxide enterprise generally uses.But asked using heating to concentrate titanium white waste acid in the presence of be difficult to overcome
Topic：（1）High energy consumption；（2）Evaporation tubes easily block, fluctuation of service；（3）Equipment material requires high, and investment is big；（4）Operation is multiple
It is miscellaneous, maintenance difficult.So be not suitable for some middle-size and small-size titanium dioxide enterprises of China.
Relevant open source literature reports the new method of some concentration titanium white waste acids.Such as：Sending out in inventor Liu Qian another name for Sichuan Province et al.
The method using solar energy heating concentration titanium white waste acid is disclosed in bright patent ZL201210365019.7, i.e., is added using solar energy
Thermal preheats to titanium white waste acid, titanium white waste acid temperature is reached 50~90 DEG C, and then the titanium white after preheating gives up
Acid is sent into be concentrated equipped with electrically heated vacuum evaporation groove, the method reduce the consumption of traditional energy in waste acid concentration,
Titanium white waste acid concentration production cost is reduced, but solar energy is not 365 days all usable, so caused by solar heat collector
Heat is intended only as being evaporated in vacuo the auxiliary thermal source of groove.
But above-mentioned document still could not be found that a kind of energy consumption is low, processing method is simple and be applied to middle-size and small-size sulfuric acid process
The method of the concentration titanium white waste acid of titanium dioxide enterprise.
The content of the invention
It is an object of the invention to provide a kind of small investment, processing method is simple, floor space is small, concentrates titanium white waste acid
Method.
To achieve the above object, the present invention is will to be pressed into heat pipe smoke pre-heating containing the titanium white waste acid that acid concentration is 20% or so
Device, heat exchange is carried out with the adopting heat pipes for heat transfer section of flue gas waste-heat, dilute spent acid is heated, through heat pipe smoke-gas preheater
Hot spent acid outlet is sent into heat-pipe furnace, is heated to more than boiling point in heat-pipe furnace, subsequently into flash tank, burst
" flash distillation ", large quantity of moisture evaporates to form water vapour in dilute spent acid, and titanium white waste acid is concentrated to normal concentration, and water vapour sprays into water
Vavuum pump, water vapour are condensed, and the titanium white waste acid being concentrated is discharged from flash tank concentrated acid outlet.
The equipment that a kind of above-mentioned method for concentrating titanium white waste acid uses includes：Dilute spent acid pump, air-introduced machine, heat pipe smoke pre-heating
Device, heat-pipe furnace, blower fan, circulation acid-proof pump, flash tank, water-jet pump, it is characterized in that：The outlet of dilute spent acid pump with
Dilute spent acid inlet tube connection of heat pipe smoke-gas preheater；The heat of hot the spent acid outlet and heat-pipe furnace of heat pipe smoke-gas preheater
Spent acid inlet tube connects；The hot spent acid inlet tube connection of hot the spent acid outlet and flash tank of heat-pipe furnace；The steaming of flash tank
The steam inlet pipe of vapor outlet pipe and water-jet pump connects；The inlet tube of the loop exit pipe of flash tank and circulation acid-proof pump
Connection；The circulation inlet tube of the outlet and heat-pipe furnace that circulate acid-proof pump connects；The dense spent acid discharge pipe of flash tank with it is dense
Spent acid pipe connects；The outlet of blower fan and the blast pipe of heat-pipe furnace connect；The smoke outlet tube and heat pipe of heat-pipe furnace
The flue gas inlet tube connection of smoke-gas preheater；The flue gas evacuated tube of heat pipe smoke-gas preheater and the inlet tube of air-introduced machine connect.
The heat-pipe furnace that a kind of above-mentioned method for concentrating titanium white waste acid uses is the stove for making fuel using coal, can also be used
Fuel oil makees the stove of fuel, can also use the stove of fuelled with natural gas；Heat pipe is divided to two sections to be made, and its heat transfer segment uses corrosion-resistant special type
Steel is made, and its bringing-up section is made of the boiler special-purpose steel of anti-itching.
The heat transfer element for the heat pipe smoke-gas preheater that a kind of above-mentioned method for concentrating titanium white waste acid uses is heat pipe, and heat pipe divides
Two sections are made, and its heat transfer segment is made of corrosion-resistant special steel, and bringing-up section is made of ordinary carbon steel.
The technique that a kind of above-mentioned method for concentrating titanium white waste acid is applied to sulfuric acid process preparing titanium dioxide.
Compared with prior art, its substantive distinguishing features protruded and significant progress are the present invention：
(1) technical process energy consumption is low：It is high using heat-pipe furnace, the efficiency of heating surface；It is low using vacuum evaporation, energy consumption；Using
Fume afterheat heats spent acid, good energy-conserving effect, and the technique makes the increased method of sulfuric acid concentration save than generally heating spent acid
It is more.
(2) technique is simple and direct, effective：The technical process is simple and direct and effective, and equipment is not easily blocked, safe and reliable to operation, is useless
Acid is recycled and laid the first stone.
(3) remarkable in economical benefits：The technology investment is few, reclaims and utilize substantial amounts of spent acid, remarkable in economical benefits.
(4) obvious environment benefit：The technical process does not produce any new environmentally hazardous harmful substance, meets " decrement
Change, recycling " principle, obvious environment benefit.
Brief description of the drawings
Fig. 1 is a kind of process chart of the method for concentration titanium white waste acid of the present invention.
Embodiment
As shown in figure 1, the equipment that a kind of method for concentrating titanium white waste acid uses includes：Dilute spent acid pump 1, air-introduced machine 2, heat pipe
Smoke-gas preheater 3, heat-pipe furnace 4, blower fan 5, circulation acid-proof pump 6, flash tank 7, water-jet pump 8, it is characterized in that：It is dilute useless
The outlet of sour pump 1 is connected with dilute spent acid inlet tube of heat pipe smoke-gas preheater 3；The hot spent acid outlet of heat pipe smoke-gas preheater 3
Pipe is connected with the hot spent acid inlet tube of heat-pipe furnace 4；The hot spent acid outlet of heat-pipe furnace 4 and the hot spent acid of flash tank 7
Inlet tube connects；The steam outlet pipe of flash tank 7 is connected with the steam inlet pipe of water-jet pump 8；Flash tank 7 recycles
Mouth pipe is connected with circulating the inlet tube of acid-proof pump 6；The circulation inlet tube of the outlet and heat-pipe furnace 4 that circulate acid-proof pump 6 connects
Connect；The dense spent acid discharge pipe of flash tank 7 is connected with dense spent acid pipe；The outlet of blower fan 5 connects with the blast pipe of heat-pipe furnace 4
Connect；The smoke outlet tube of heat-pipe furnace 4 is connected with the flue gas inlet tube of heat pipe smoke-gas preheater 3；Heat pipe smoke-gas preheater 3
Flue gas evacuated tube is connected with the inlet tube of air-introduced machine 2.
Idiographic flow is as follows：The dilute spent acid of titanium white is pressed into heat pipe smoke-gas preheater 3 using dilute spent acid pump 1, more than flue gas
The adopting heat pipes for heat transfer section of heat heating carries out heat exchange, and dilute spent acid is heated, and the hot spent acid outlet through heat pipe smoke-gas preheater 3 is sent
Enter heat-pipe furnace 4, more than boiling point is heated in heat-pipe furnace 4, it is dilute subsequently into the vacuum environment of flash tank 7
Spent acid is nebulized by shower nozzle injection, is happened suddenly " flash distillation ", and large quantity of moisture evaporates to form water vapour in dilute spent acid, water vapour entrainment of
Liquid foam is separated the tiny liquid foam of water vapour entrainment, it is true then to enter water injection by steam outlet pipe by wire mesh demister
Empty pump 8, water vapour is condensed, and due to the swabbing action of water-jet pump 8, flash tank 7 is in vacuum negative pressure condition.In tank
Dilute spent acid large quantity of moisture evaporated, acid-spending strength increases, downwards sedimentation, and the spent acid of low concentration rolls upwards, and liquid layer is in tank
Form circulation；On the other hand, cool because of evaporation, and the upper strata spent acid circulation acid-proof pump 6 of not up to concentration is sent into heat pipe and added
Continue to heat in hot stove 4, the dense spent acid that concentration requirement is reached in liquid base layer is discharged from the dense spent acid discharge pipe in bottom.With blower fan 5
Air feeding heat-pipe furnace 4 is combustion-supporting, heat pipe smoke-gas preheater 3 is entered after stack gas cleaning dedusting, utilizes flue gas waste heat
Heat pipe is heated, then extracts row out to air from the blow-down pipe of heat pipe smoke-gas preheater 3 with air-introduced machine 2.
Embodiment 1
Dilute spent acid pump 1 is used to contain acid concentration for 20% or so, the dilute spent acid of titanium white that temperature is 50 DEG C is pressed into heat pipe flue gas
In preheater 3, heat exchange is carried out with the adopting heat pipes for heat transfer section of flue gas waste-heat, dilute spent acid is heated, and temperature lifting is arrived
80 degree or so, the hot spent acid outlet through heat pipe smoke-gas preheater 3 is sent into heat-pipe furnace 4, is heated in heat-pipe furnace 4
To more than boiling point, subsequently into the vacuum environment of flash tank 7, dilute spent acid is nebulized by shower nozzle injection, is happened suddenly " flash distillation ", dilute
Large quantity of moisture is evaporated to form water vapour in spent acid, and water vapour, by wire mesh demister, water vapour is carried secretly thin entrainment of liquid foam
Small liquid foam separation, then enters water-jet pump 8, water vapour is condensed, due to water-jet pump 8 by steam outlet pipe
Swabbing action, flash tank 7 is in vacuum negative pressure condition.Dilute spent acid large quantity of moisture in tank is evaporated, and acid-spending strength increases,
Sedimentation, the spent acid of low concentration roll upwards downwards, and liquid layer forms circulation in tank；On the other hand, cool because of evaporation, and do not reach
Continue to heat into the upper strata spent acid circulation feeding heat-pipe furnace 4 of acid-proof pump 6 of concentration, reaching concentration in liquid base layer is
55% or so dense spent acid is discharged from the dense spent acid discharge pipe in bottom.With blower fan 5 by air be sent into heat-pipe furnace 4 it is combustion-supporting, flue gas
Enter heat pipe smoke-gas preheater 3 after purifying and dedusting, using flue gas waste-heat heat pipe, then with air-introduced machine 2 from heat pipe flue gas
The blow-down pipe of preheater 3 extracts row out to air.
Embodiment 2
Dilute spent acid pump 1 is used to contain acid concentration for 30% or so, the dilute spent acid of titanium white that temperature is 70 DEG C is pressed into heat pipe flue gas
In preheater 3, heat exchange is carried out with the adopting heat pipes for heat transfer section of flue gas waste-heat, dilute spent acid is heated, and temperature lifting is arrived
100 degree or so, the hot spent acid outlet through heat pipe smoke-gas preheater 3 is sent into heat-pipe furnace 4, is added in heat-pipe furnace 4
Heat is to more than boiling point, and subsequently into the vacuum environment of flash tank 7, dilute spent acid is nebulized by shower nozzle injection, is happened suddenly " flash distillation ",
Large quantity of moisture is evaporated to form water vapour in dilute spent acid, and water vapour, by wire mesh demister, water vapour is carried secretly entrainment of liquid foam
Tiny liquid foam separation, then enters water-jet pump 8 by steam outlet pipe, and water vapour is condensed, because water sprays vacuum
The swabbing action of pump 8, flash tank 7 is set to be in vacuum negative pressure condition.Dilute spent acid large quantity of moisture in tank is evaporated, and acid-spending strength increases
Height, settle downwards, the spent acid of low concentration rolls upwards, and liquid layer forms circulation in tank；On the other hand, cool because of evaporation, and
The upper strata spent acid circulation acid-proof pump 6 of not up to concentration, which is sent into heat-pipe furnace 4, to be continued to heat, and reaches concentration in liquid base layer
Discharged for 60% or so dense spent acid from the dense spent acid discharge pipe in bottom.With blower fan 5 by air be sent into heat-pipe furnace 4 it is combustion-supporting, flue
Enter heat pipe smoke-gas preheater 3 after gas purifying and dedusting, using flue gas waste-heat heat pipe, then with air-introduced machine 2 from heat pipe cigarette
The blow-down pipe of air preheater 3 extracts row out to air.
Claims (3)
1. a kind of method for concentrating titanium white waste acid, the concentration technology of caused spent acid suitable for sulfuric acid process preparing titanium dioxide, its
It is characterised by that the equipment that this method uses includes：Dilute spent acid pump (1), air-introduced machine (2), heat pipe smoke-gas preheater (3), heat pipes heat
Stove (4), blower fan (5), circulation acid-proof pump (6), flash tank (7), water-jet pump (8), it is characterized in that：Dilute spent acid pump (1)
Outlet is connected with dilute spent acid inlet tube of heat pipe smoke-gas preheater (3)；The hot spent acid outlet of heat pipe smoke-gas preheater (3) with
The hot spent acid inlet tube connection of heat-pipe furnace (4)；The heat of the hot spent acid outlet and flash tank (7) of heat-pipe furnace (4) is given up
Sour inlet tube connection；The steam outlet pipe of flash tank (7) is connected with the steam inlet pipe of water-jet pump (8)；Flash tank (7)
Loop exit pipe with circulation acid-proof pump (6) inlet tube be connected；Circulate the outlet and heat-pipe furnace (4) of acid-proof pump (6)
Circulation inlet tube connection；The dense spent acid discharge pipe of flash tank (7) is connected with dense spent acid pipe；The outlet and heat pipe of blower fan (5)
The blast pipe connection of heating furnace (4)；The smoke outlet tube of heat-pipe furnace (4) and the gas approach of heat pipe smoke-gas preheater (3)
Pipe connects；The flue gas evacuated tube of heat pipe smoke-gas preheater (3) is connected with the inlet tube of air-introduced machine (2).
A kind of 2. method for concentrating titanium white waste acid according to claim 1, it is characterised in that：The heat-pipe furnace of use
（4）It is the stove for making fuel using coal, can also uses fuel oil to make the stove of fuel, can also uses the stove of fuelled with natural gas；Heat pipe point
Two sections are made, and its heat transfer segment is made of corrosion-resistant special steel, and its bringing-up section is made of oxidation resistant boiler special-purpose steel.
A kind of 3. method for concentrating titanium white waste acid according to claim 1, it is characterised in that：The heat pipe smoke pre-heating of use
Device（3) heat transfer element is heat pipe, and heat pipe is divided to two sections to be made, and its heat transfer segment is made of corrosion-resistant special steel, and bringing-up section is adopted
It is made of ordinary carbon steel.
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| CN201610526752.0A CN106115634B (en) | 2016-07-06 | 2016-07-06 | A kind of method for concentrating titanium white waste acid |
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| CN201610526752.0A CN106115634B (en) | 2016-07-06 | 2016-07-06 | A kind of method for concentrating titanium white waste acid |
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| CN108726490A (en) * | 2017-04-20 | 2018-11-02 | 何庆勇 | A kind of Waste Sulfuric Acid extracting and concentrating technology using fume afterheat |
| CN109941970A (en) * | 2019-04-24 | 2019-06-28 | 成都先进金属材料产业技术研究院有限公司 | Utilize the method for aluminum aluminum sulfate concentration titanium white waste acid |
| CN113387334B (en) * | 2021-06-16 | 2022-10-28 | 龙佰四川钛业有限公司 | Concentration and purification method of titanium dioxide waste acid by sulfuric acid process |
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| EP0476172B1 (en) * | 1990-09-20 | 1993-10-20 | KRONOS TITAN-Gesellschaft mbH | Process for preconcentrating diluted acid obtained during titanium dioxide preparation according to the sulphate process and use of apparatus for this process |
| CN202220087U (en) * | 2011-07-27 | 2012-05-16 | 杨德林 | Regeneration processing device for waste acid through evaporation method |
| CN104176714B (en) * | 2014-08-21 | 2016-02-10 | 钮德明 | A kind of method adopting reverse osmosis method to concentrate titanium white waste acid |
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Effective date of registration: 20190725 Address after: 532312 Leiping Town, Daxin County, Chongzuo City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Detian chemical recycling Limited by Share Ltd Address before: 530003 the Guangxi Zhuang Autonomous Region, Nanning, ASEAN Economic Development Zone (Wuming built) education road, No. 2 Patentee before: Niu Deming |