CN102755815A - Titanium dioxide acidolysis tail gas treatment method - Google Patents
Titanium dioxide acidolysis tail gas treatment method Download PDFInfo
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- CN102755815A CN102755815A CN2012102350072A CN201210235007A CN102755815A CN 102755815 A CN102755815 A CN 102755815A CN 2012102350072 A CN2012102350072 A CN 2012102350072A CN 201210235007 A CN201210235007 A CN 201210235007A CN 102755815 A CN102755815 A CN 102755815A
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- Prior art keywords
- tail gas
- titanium dioxide
- sulfuric acid
- circulatory pool
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 24
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 30
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000003595 mist Substances 0.000 claims abstract description 12
- 238000005406 washing Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000002699 waste material Substances 0.000 claims abstract description 6
- 238000005201 scrubbing Methods 0.000 claims description 16
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 238000005516 engineering process Methods 0.000 claims description 13
- 238000005903 acid hydrolysis reaction Methods 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000003513 alkali Substances 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 38
- 235000010215 titanium dioxide Nutrition 0.000 description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000010532 solid phase synthesis reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
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- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention belongs to the technical field of environmental protection, and particularly provides a titanium dioxide acidolysis tail gas treatment method. The titanium dioxide acidolysis tail gas treatment method comprises the following steps of: absorbing and cooling high temperature acidolysis tail gas generated by a titanium dioxide process adopting a sulfuric acid method through a washing tower, and processing the tail gas, the volume of which is reduced, through a venturi, so as to realize the tail gas treatment discharge standard, and realize clean production. According to the invention, a Ph value of a liquid in a circulating pool is kept more than or equal to 4.5, and the temperature of the tail gas is ensured to drop to be below 90 DEG C when a main reaction is generated; the tail gas which is greatly reduced in volume after cooling is processed through the venturi, the venturi adopts alkali waste generated by the titanium dioxide process adopting a sulfuric acid method, so as to realize the tail gas treatment discharge standard and realize the clean production; and most of sulfuric acid mist and sulfur dioxide gas of the tail gas are absorbed in the washing tower because of washing of a great quantity of circulating liquid, and the consumption of thin alkali in a follow-up venturi scrubber is less.
Description
Technical field
The invention belongs to environmental technology field, especially a kind of titanium dioxide acid hydrolysis exhaust gas treating method.
Background technology
Titanium white production has sulfuric acid process and two kinds of titanium white production technologies of chloridising; Though chloridising is by the consistent development main flow of thinking titanium white technology of insider; But present stage is that the master is the objective reality that industry faces with the sulfuric acid process in China; Sulfuric acid method titanium pigment is low because of cost, technology is prone to grasp, product type occupies very big market proportion more; And energy-saving and emission-reduction are problems the most scabrous of sulfate process titanium dioxide technology always, and wherein smoke gas treatment, UTILIZATION OF VESIDUAL HEAT IN, spent acid comprehensive utilization are keys.
Sulfate process titanium dioxide is produced hydrolysis procedure has solid phase method, liquid phase method and two phase process, and domestic main titanium white production enterprise all adopts the solid phase method acidolysis process.Solid phase method has following characteristics: 1. reaction temperature is high, and is high to equipment heatproof and requirement for anticorrosion, comprises agitated reactor and exhaust pipe; 2. the breeze appropriateness there is requirement; 3. reaction is violent, and moment produces a large amount of tail gas, and the vent gas treatment difficulty is big.
Former titanium dioxide acid hydrolysis exhaust gas treating method, as shown in Figure 1, acidolysis tail gas directly enters in the air after the scrubbing tower washing, and when main reaction took place, flue gas can not cool off moment, and a large amount of sulfuric acid droplets emptyings of flue gas band cause the chimney surrounding environment to pollute; Owing to be the nature exhaust, when main reaction was instead given birth to, because flue gas has little time discharge, and partial fume had polluted operating environment in indoor discharge, and it is healthy to influence the employee.
Summary of the invention
The technical problem that the present invention will solve is: based on the problems referred to above, the present invention provides a kind of aborning salkali waste of sulfate process titanium dioxide technology that utilizes, and realizes the vent gas treatment qualified discharge, realizes the titanium dioxide acid hydrolysis exhaust gas treating method of cleaner production simultaneously.
The technical solution adopted for the present invention to solve the technical problems is: a kind of titanium dioxide acid hydrolysis exhaust gas treating method is provided, comprises the steps:
(1) the high temperature acidolysis tail gas that sulfate process titanium dioxide technology is produced feeds scrubbing tower, and tail gas flows from bottom to top, simultaneously; Absorption liquid is retracted to the top spray system in the scrubbing tower by pump in circulatory pool; Tail gas produces atomizing with the absorption liquid that flows that sprays from spray system from top to bottom and contacts, absorption portion sulfur dioxide and most of sulfuric acid mist, and the temperature of the acidolysis tail gas after the scrubbing tower washing is 0～90 ℃; The temperature of absorption liquid is 0～45 ℃, and liquid-gas ratio is 1:1～1.5L/m in the scrubbing tower
3
(2) tail gas after will washing feeds the secondary Venturi tube, and simultaneously, extracting concentration by pump from the diluted alkaline jar is that 2～10% diluted alkaline absorbs sulfur dioxide and small amount of sulfur acid mist remaining the tail gas to Venturi tube, makes the tail gas sulfuric acid mist concentration after the absorption reach 0～45mg/m
3, particle concentration arrives 0～120mg/m
3, the tail gas after will purifying is at last discharged through blower fan cooling back, and the diluted alkaline temperature that has absorbed absorbent is 0～35 ℃, and a part flows into circulatory pool, and with the circulation fluid generation neutralization reaction in the circulatory pool, another part decontaminated water is handled.
The temperature of the acidolysis tail gas in the step (1) after the scrubbing tower washing reduces, and then volume can dwindle, and the tail gas that volume dwindles greatly after will cooling off in the step (2) is handled through Venturi tube again, realizes the vent gas treatment qualified discharge, has also realized cleaner production.In scrubbing tower, because a large amount of circulation fluid washing, most of sulfuric acid mist and sulfur dioxide gas have been absorbed the liquid absorption in the tail gas, and the diluted alkaline consumption seldom in the follow-up Venturi tube.
Constantly there is supplementing water to add in the described step (1) in the circulatory pool, keeps pH value >=4.5 of liquid in the circulatory pool.PH value >=4.5 of liquid in the circulatory pool in the time of just can guaranteeing that main reaction takes place, are reduced to exhaust temperature below 90 ℃.
Diluted alkaline in the described step (2) is the aborning salkali waste of sulfate process titanium dioxide technology, and salkali waste rationally utilizes, and really realizes energy-conserving and environment-protective.
The throat gas speed of the Venturi tube in the described step (2) is that 40～60m/s, trunnion resistance are 1200～1500Pa.
The invention has the beneficial effects as follows: 1, keep pH value >=4.5 of liquid in the circulatory pool, when guaranteeing that main reaction takes place, exhaust temperature is reduced to below 90 ℃; 2, will cool off the back tail gas that dwindles greatly of volume and handle through Venturi tube, Venturi tube adopts the aborning salkali waste of sulfate process titanium dioxide technology, realizes the vent gas treatment qualified discharge, has also realized cleaner production; 3, in scrubbing tower, because a large amount of circulation fluid washing, most of sulfuric acid mist and sulfur dioxide gas are absorbed by water in the tail gas, and the diluted alkaline consumption seldom in the follow-up Venturi Scrubber.
Description of drawings
Embodiment further specifies the present invention below in conjunction with accompanying drawing.
Fig. 1 is the process chart of the titanium dioxide acid hydrolysis exhaust gas treating method of prior art.
Fig. 2 is a process chart of the present invention.
The specific embodiment
Combine now specific embodiment that the present invention is described further, following examples are intended to explain the present invention rather than to further qualification of the present invention.
Process chart as shown in Figure 2; The high temperature acidolysis tail gas that sulfate process titanium dioxide technology produces gets into scrubbing tower; Absorption liquid is retracted in the circulatory pool by pump and produces atomizing with tail gas in the scrubbing tower and contact, absorption portion sulfur dioxide and most of sulfuric acid mist, and the temperature of the acidolysis tail gas after scrubbing tower washs is 0～90 ℃; The temperature of absorption liquid is 0～45 ℃, and liquid-gas ratio is 1:1～1.5L/m in the scrubbing tower
3Tail gas after washing feeds the secondary Venturi tube, and simultaneously, extracting concentration by pump from the diluted alkaline jar is that 2～10% diluted alkaline absorbs sulfur dioxide and small amount of sulfur acid mist remaining the tail gas to Venturi tube, makes the tail gas sulfuric acid mist concentration after the absorption reach 0～45mg/m
3, particle concentration arrives 0～120mg/m
3, the tail gas after will purifying is at last discharged through blower fan cooling back, and the diluted alkaline temperature that has absorbed absorbent is 0～35 ℃, and a part flows into circulatory pool, and with the circulation fluid generation neutralization reaction in the circulatory pool, another part decontaminated water is handled.Constantly there is supplementing water to add in the circulatory pool, keeps pH value >=4.5 of liquid in the circulatory pool.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification, must confirm its technical scope according to the claim scope.
Claims (4)
1. a titanium dioxide acid hydrolysis exhaust gas treating method is characterized in that: comprise the steps:
(1) the high temperature acidolysis tail gas that sulfate process titanium dioxide technology is produced feeds scrubbing tower, and tail gas flows from bottom to top, simultaneously; Absorption liquid is retracted to the top spray system in the scrubbing tower by pump in circulatory pool; Tail gas produces atomizing with the absorption liquid that flows that sprays from spray system from top to bottom and contacts, absorption portion sulfur dioxide and most of sulfuric acid mist, and the temperature of the acidolysis tail gas after the scrubbing tower washing is 0～90 ℃; The temperature of absorption liquid is 0～45 ℃, and liquid-gas ratio is 1:1～1.5L/m in the scrubbing tower
3
(2) tail gas after will washing feeds the secondary Venturi tube, and simultaneously, extracting concentration by pump from the diluted alkaline jar is that 2～10% diluted alkaline absorbs sulfur dioxide and small amount of sulfur acid mist remaining the tail gas to Venturi tube, makes the tail gas sulfuric acid mist concentration after the absorption reach 0～45mg/m
3, particle concentration arrives 0～120mg/m
3, the tail gas after will purifying is at last discharged through blower fan cooling back, and the diluted alkaline temperature that has absorbed absorbent is 0～35 ℃, and a part flows into circulatory pool, and with the circulation fluid generation neutralization reaction in the circulatory pool, another part decontaminated water is handled.
2. titanium dioxide acid hydrolysis exhaust gas treating method according to claim 1 is characterized in that: constantly have supplementing water to add in the described step (1) in the circulatory pool, keep pH value >=4.5 of liquid in the circulatory pool.
3. titanium dioxide acid hydrolysis exhaust gas treating method according to claim 1 is characterized in that: the diluted alkaline in the described step (2) is the aborning salkali waste of sulfate process titanium dioxide technology.
4. titanium dioxide acid hydrolysis exhaust gas treating method according to claim 1 is characterized in that: the throat gas speed of the Venturi tube in the described step (2) is 40～60m/s, and the trunnion resistance is 1200～1500Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102350072A CN102755815A (en) | 2012-07-06 | 2012-07-06 | Titanium dioxide acidolysis tail gas treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102350072A CN102755815A (en) | 2012-07-06 | 2012-07-06 | Titanium dioxide acidolysis tail gas treatment method |
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| CN102755815A true CN102755815A (en) | 2012-10-31 |
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| CN2012102350072A Pending CN102755815A (en) | 2012-07-06 | 2012-07-06 | Titanium dioxide acidolysis tail gas treatment method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708540A (en) * | 2013-12-27 | 2014-04-09 | 攀枝花东方钛业有限公司 | Method for recycling alkali liquor in production process of titanium dioxide |
| CN105016308A (en) * | 2015-08-05 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Device and method for recycling sulfur in acidolysis exhaust gas |
| CN106390722A (en) * | 2016-11-04 | 2017-02-15 | 四川龙蟒钛业股份有限公司 | Method for applying dilute waste alkali to treating tail gas from sulfuric acid plants |
| CN109621670A (en) * | 2018-12-14 | 2019-04-16 | 四川龙蟒钛业股份有限公司 | A kind of method of promotor aid in treatment sulfuric acid titanium white calcining tail gas |
| CN110479058A (en) * | 2019-09-03 | 2019-11-22 | 攀枝花攀钢集团设计研究院有限公司 | Sulfuric acid method titanium pigment acid hydrolysis tail gas purification device and method |
| CN110642230A (en) * | 2019-10-31 | 2020-01-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving concentration of titanium white waste acid |
| CN113509831A (en) * | 2021-06-16 | 2021-10-19 | 宁波新福钛白粉有限公司 | Sulfuric acid method titanium dioxide acidolysis tail gas treatment system and treatment method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3250059A (en) * | 1963-05-15 | 1966-05-10 | Nat Lead Co | Method and means for conditioning gases |
| CN1883762A (en) * | 2006-05-31 | 2006-12-27 | 武汉方圆钛白粉有限责任公司 | Method for treating tail gas in acidolysis main reaction in sulfuric acid method titanium pigment production |
| CN201949789U (en) * | 2011-01-27 | 2011-08-31 | 安徽省化工设计院 | Absorption treatment device for acidolysis tail gas of titanium white |
-
2012
- 2012-07-06 CN CN2012102350072A patent/CN102755815A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3250059A (en) * | 1963-05-15 | 1966-05-10 | Nat Lead Co | Method and means for conditioning gases |
| CN1883762A (en) * | 2006-05-31 | 2006-12-27 | 武汉方圆钛白粉有限责任公司 | Method for treating tail gas in acidolysis main reaction in sulfuric acid method titanium pigment production |
| CN201949789U (en) * | 2011-01-27 | 2011-08-31 | 安徽省化工设计院 | Absorption treatment device for acidolysis tail gas of titanium white |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708540A (en) * | 2013-12-27 | 2014-04-09 | 攀枝花东方钛业有限公司 | Method for recycling alkali liquor in production process of titanium dioxide |
| CN105016308A (en) * | 2015-08-05 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Device and method for recycling sulfur in acidolysis exhaust gas |
| CN105016308B (en) * | 2015-08-05 | 2017-03-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Reclaim the device and method of sulfur in acid hydrolysis tail gas |
| CN106390722A (en) * | 2016-11-04 | 2017-02-15 | 四川龙蟒钛业股份有限公司 | Method for applying dilute waste alkali to treating tail gas from sulfuric acid plants |
| CN109621670A (en) * | 2018-12-14 | 2019-04-16 | 四川龙蟒钛业股份有限公司 | A kind of method of promotor aid in treatment sulfuric acid titanium white calcining tail gas |
| CN110479058A (en) * | 2019-09-03 | 2019-11-22 | 攀枝花攀钢集团设计研究院有限公司 | Sulfuric acid method titanium pigment acid hydrolysis tail gas purification device and method |
| CN110642230A (en) * | 2019-10-31 | 2020-01-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving concentration of titanium white waste acid |
| CN113509831A (en) * | 2021-06-16 | 2021-10-19 | 宁波新福钛白粉有限公司 | Sulfuric acid method titanium dioxide acidolysis tail gas treatment system and treatment method |
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Application publication date: 20121031 |