CN1883762A - Method for treating tail gas in acidolysis main reaction in sulfuric acid method titanium pigment production - Google Patents
Method for treating tail gas in acidolysis main reaction in sulfuric acid method titanium pigment production Download PDFInfo
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- CN1883762A CN1883762A CN 200610019227 CN200610019227A CN1883762A CN 1883762 A CN1883762 A CN 1883762A CN 200610019227 CN200610019227 CN 200610019227 CN 200610019227 A CN200610019227 A CN 200610019227A CN 1883762 A CN1883762 A CN 1883762A
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Abstract
A process for processing tail gas from acidolysis main reaction in production of titanium dioxide by sulfuric acid method, wherein the device for the process comprises acidolysis tank (1), flue (2), Venturi tube (5-1), circulating cistern (6-1), and water scrubber (9), characterized in that there are Venturi tube (5-2) and air chamber (6-2) between the water scrubber (9) and end fan (7), the top end of water scrubber (9) communicates with the top end of Venturi tube (5-2) via pipe, and the lower end of Venturi tube (5-2) lies in the air chamber (6-2), whose top end communicates with end fan (7). In above process, the environmental pollution from conventional process can be reduced with effluent concentration much lower than national standard, and the discharge temperature of tail gas is lower, and tail air output is less.
Description
Technical field
The present invention relates to the technology in the sulfuric acid method titanium pigment production process tail gas handled, more particularly it is the method for vent gas treatment during the acidolysis main reaction during a kind of sulfuric acid method titanium pigment is produced.
Background technology
The production process of acidolysis tail gas: in the titanium white production producer, except that climbing Jinzhou titanium industry company of steel group, all the other nearly 70 families are Production By Sulfuric Acid Process technology at home.In the sulfate process titanium dioxide production process, acidolysis is with rare spent acid (concentration is about 20%) or the running water dilution concentrated sulfuric acid (concentration 93-98%), the decomposition ilmenite (FeTiO that its sulfuric acid concentration is reached use behind the 85-89%
3), its chemical equation is:
Ilmenite has also produced some high price iron compound (Fe after weathering
2O
3) also participated in following reaction:
From reaction equation 1., 2., can find out that above-mentioned reaction all is exothermic reaction 3., and main reaction speed fast (3-5 minute), temperature height (180-200 ℃), instantaneous gas (vapour) amount is big.The overwhelming majority also has a spot of dust, SO for water vapour in the tail gas that is produced
2Discharging with pollutants such as sulfuric acid mists.Acidolysis tail gas must carry out the comprehensive regulation in order to reach the discharge standard of national environmental protection department regulation before the discharging, and qualified discharge satisfies the requirement of law, rules.
Handle the discharge standard of back tail gas: when existing aiutage height is 30m, GB GB16297-1996 " discharge standard of air pollutants) " three class district discharge standards: sulfuric acid mist concentration of emission :≤70mg/Nm
3, sulfur dioxide emissioning concentration :≤700mg/Nm
3
Domestic most of Producing Titanium Dioxide producer, generally adopt secondary water spray absorption pattern to handle to acidolysis tail gas, handling the back sulfuric acid mist by the two-stage spray compares with the emission limit that national environmental protection department stipulates with sulfur dioxide emissioning concentration, though concentration value meets the environmental regulations requirement, but still it is higher, careless slightly, the time have the phenomenon of exceeding standard to take place.Disposed tail gas is because delivery temperature higher (about 60 ℃) in addition, and chimney breast tolerance is bigger, and mist vapour is soaring, and is full of smoke, especially winter more outstanding, visual pollution is obvious.
Since main reaction speed fast (3-5 minute), temperature height (180-200 ℃), and instantaneous gas (vapour) amount is big.All think in the industry: wanting to reduce exhaust emission can not increase the spray absorption plant again, will influence the mass rate of emission of flue gas because of increasing the spray absorption plant again, increase SR, accidentally great accident will take place, therefore only may adopt other method if handle.
Summary of the invention
The objective of the invention is to overcome above-mentioned existing disadvantages of background technology part, and provide a kind of sulfuric acid method titanium pigment produce in the method for vent gas treatment during the acidolysis main reaction.It can be controlled at discharging pollutants of tail gas in the main reaction in the national tolerance band, and is significantly less than national standard.
The objective of the invention is to reach: the method for vent gas treatment during the acidolysis main reaction during a kind of sulfuric acid method titanium pigment is produced by following measure, it comprises acid hydrolysis tank 1, the chimney 2 of band stack cover 3, chimney 2 feeds venturi 5-1 by stovepipe and dish valve 4, the bottom of venturi 5-1 connects circulating water pool 6-1, and by communicating pipe 10 connecting water scrubber 9, the lower end of water scrubber 9 is positioned on the circulating water pool 6-1, and tail blower fan 7 connects the upper end of outer smoke evacuation chimney 8 and water scrubber 9; Circulating water pool 6-1 connects venturi 5-1 middle part by water circulating pump 11, and sensible spray pump 12 connects venturi 5-1 end; It is characterized in that between described water scrubber 9 and tail blower fan 7, also having venturi 5-2 and air chamber 6-2, the upper end of described water scrubber 9 feeds the upper end of venturi 5-2 by pipeline, the lower end of 5-2 is positioned on the air chamber 6-2 in zhang mound, and the mouth of pipe of air chamber 6-2 upper end is connected with tail blower fan 7.
In a kind of sulfuric acid method titanium pigment production of the present invention during the acidolysis main reaction method of vent gas treatment have following advantage: the 1. acidolysis tail gas treatment process of our company's independent research, be to have increased one-level spray absorption plant on the basis of conventional processes again, this device has demist, cooling function concurrently.2. after device drops into trial run, repeatedly monitor through environmental administration, sulfuric acid mist can be from the average 421.9mg/Nm before handling
3Be reduced to average 38.7mg/Nm
3SO
2Concentration is from handling preceding average 76mg/Nm
3Be reduced to average 29mg/Nm
3, the concentration of emission of pollutant is significantly less than the limit value standard of national regulation.3. after simultaneously tail gas further being lowered the temperature, delivery temperature is lower, and tolerance is littler, and effluxing chimney breast only has low smoke to emerge, thereby has fundamentally eliminated visual pollution, and the environment looks are greatly improved.
Description of drawings
Fig. 1 for existing sulfuric acid method titanium pigment produce in the schematic diagram of the method for vent gas treatment during the acidolysis main reaction.
Fig. 2 for a kind of sulfuric acid method titanium pigment of the present invention produce in the schematic diagram of the method for vent gas treatment during the acidolysis main reaction.
1. acid hydrolysis tanks among the figure, 2. chimney, 3. stack cover, 4. stovepipe and dish valve, 5-1. venturi, 5-2. venturi, 6-1. circulating water pool, 6-2. air chamber, 7. tail blower fan, 8. outer smoke evacuation chimney, 9. water scrubber, 10. communicating pipe, 11. water circulating pumps, 12. spray pumps.
The specific embodiment
The performance of the method for vent gas treatment during the acidolysis main reaction in describing existing sulfuric acid method titanium pigment in detail the method for vent gas treatment and a kind of sulfuric acid method titanium pigment of the present invention are produced during the acidolysis main reaction in producing below in conjunction with accompanying drawing, advantage of the present invention like this will become apparent and understands easily.
Consult Fig. 1, Fig. 2 as can be known: the method for vent gas treatment during the acidolysis main reaction during a kind of sulfuric acid method titanium pigment is produced, it comprises acid hydrolysis tank 1, the chimney 2 of band stack cover 3, chimney 2 feeds venturi 5-1 by stovepipe and dish valve 4, the bottom of venturi 5-1 connects circulating water pool 6-1, and by communicating pipe 10 connecting water scrubber 9, the lower end of water scrubber 9 is positioned on the circulating water pool 6-1, and tail blower fan 7 connects the upper end of outer smoke evacuation chimney 8 and water scrubber 9; Circulating water pool 6-1 connects 5-1 middle part in zhang mound by water circulating pump 11, and sensible spray pump 12 connects venturi 5-1 upper end; It is characterized in that between described water scrubber 9 and tail blower fan 7, also having venturi 5-2 and air chamber 6-2, the upper end of described water scrubber 9 feeds the upper end of Venturi tube (5-2) by pipeline, the lower end of Venturi tube 5-2 is positioned on the air chamber 6-2, and the mouth of pipe of air chamber 6-2 upper end is connected with tail blower fan 7.
As shown in Figure 1: in the existing sulfuric acid method titanium pigment production during acidolysis main reaction method operating process of vent gas treatment be: before acid hydrolysis tank 1 carries out main reaction, build the cover plate 3 on the chimney 2, drive stovepipe dish valve 4, drive venturi 5-1 and water scrubber water circulating pump 11, treat to start when main reaction is about to begin tail blower fan 7, tail gas cools off behind venturi 5-1 water spray, dedusting and cooling, tail gas tolerance reduces, temperature reduces, pass through further washing, dedusting and the temperature-fall period of water scrubber 9 again, the tail gas after the purification is by outer smoke evacuation chimney 8 emptyings.
As shown in Figure 2: in a kind of sulfuric acid method titanium pigment production of the present invention during the acidolysis main reaction method of vent gas treatment be on the basis of conventional processes, to have increased one-level spray absorption plant again, promptly between water scrubber 9 and tail blower fan 7, also have Venturi tube 5-2 and air chamber 6-2, the upper end of water scrubber 9 feeds the upper end of Venturi tube 5-2 by pipeline, the lower end of Venturi tube 5-2 is positioned on the air chamber 6-2, and the mouth of pipe of air chamber 6-2 upper end is connected with tail blower fan 7.This device has demist, cooling function concurrently, and after device put into operation, the concentration of emission of pollutant was significantly less than the limit value standard of national regulation.
Need to prove that for these professional those skilled in the art under the situation that does not change the principle of the invention, can also make suitable change and distortion to the present invention, this belongs to protection scope of the present invention equally.
Claims (1)
1, the method for vent gas treatment during the acidolysis main reaction during a kind of sulfuric acid method titanium pigment is produced, it comprises acid hydrolysis tank (1), the chimney (2) of band stack cover (3), chimney (2) feeds Venturi tube (5-1) by stovepipe and dish valve (4), the bottom of Venturi tube (5-1) connects circulating water pool (6-1), and by communicating pipe (10) connecting water scrubber (9), the lower end of water scrubber (9) is positioned on the circulating water pool (6-1), and tail blower fan (7) connects the upper end of outer smoke evacuation chimney (8) and water scrubber (9); Circulating water pool (6-1) connects Venturi tube (5-1) middle part by water circulating pump (11), and sensible spray pump (12) connects Venturi tube (5-1) upper end; It is characterized in that between described water scrubber (9) and tail blower fan (7), also having Venturi tube (5-2) and air chamber (6-2), the upper end of described water scrubber (9) feeds the upper end of Venturi tube (5-2) by pipeline, the lower end of Venturi tube (5-2) is positioned on the air chamber (6-2), and the mouth of pipe of air chamber (6-2) upper end is connected with tail blower fan (7).
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|---|---|---|---|
| CNB2006100192276A CN100369655C (en) | 2006-05-31 | 2006-05-31 | Method for treating tail gas in acidolysis main reaction in sulfuric acid method titanium pigment production |
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|---|---|---|---|
| CNB2006100192276A CN100369655C (en) | 2006-05-31 | 2006-05-31 | Method for treating tail gas in acidolysis main reaction in sulfuric acid method titanium pigment production |
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| CN1883762A true CN1883762A (en) | 2006-12-27 |
| CN100369655C CN100369655C (en) | 2008-02-20 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102631819A (en) * | 2012-05-08 | 2012-08-15 | 江西六国化工有限责任公司 | Tail gas washing method for reducing ammonia consumption |
| CN102755815A (en) * | 2012-07-06 | 2012-10-31 | 江苏恒丰伟业科技工程有限公司 | Titanium dioxide acidolysis tail gas treatment method |
| CN104001407A (en) * | 2014-05-21 | 2014-08-27 | 淮南市明月环保科技有限责任公司 | Acidolysis waste gas recycling system |
| CN104667637A (en) * | 2015-03-04 | 2015-06-03 | 安徽池州博源非金属矿研发中心有限公司 | Rotary kiln flue gas purification device |
| CN109276980A (en) * | 2018-10-18 | 2019-01-29 | 成都先进金属材料产业技术研究院有限公司 | The processing method of acid hydrolysis 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 |
| 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107694299A (en) * | 2017-10-20 | 2018-02-16 | 南京钛白化工有限责任公司 | A kind of exhaust gas processing device for sulfate process titanium dioxide acidolysis |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2277296Y (en) * | 1997-01-30 | 1998-04-01 | 北京市市政工程机械公司 | High-efficiency wet-desulfurizing dust remover |
| CN2367613Y (en) * | 1999-05-13 | 2000-03-08 | 关振民 | Tar processing device of straw gas |
| CN2635186Y (en) * | 2003-08-22 | 2004-08-25 | 长沙贝尔环保节能设备有限公司 | Stack gas decontamination dust collector |
-
2006
- 2006-05-31 CN CNB2006100192276A patent/CN100369655C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102631819A (en) * | 2012-05-08 | 2012-08-15 | 江西六国化工有限责任公司 | Tail gas washing method for reducing ammonia consumption |
| CN102755815A (en) * | 2012-07-06 | 2012-10-31 | 江苏恒丰伟业科技工程有限公司 | Titanium dioxide acidolysis tail gas treatment method |
| CN104001407A (en) * | 2014-05-21 | 2014-08-27 | 淮南市明月环保科技有限责任公司 | Acidolysis waste gas recycling system |
| CN104667637A (en) * | 2015-03-04 | 2015-06-03 | 安徽池州博源非金属矿研发中心有限公司 | Rotary kiln flue gas purification device |
| CN109276980A (en) * | 2018-10-18 | 2019-01-29 | 成都先进金属材料产业技术研究院有限公司 | The processing method of acid hydrolysis 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 |
| 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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|---|---|
| CN100369655C (en) | 2008-02-20 |
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Effective date of registration: 20160422 Address after: 433100 Hubei city in Qianjiang Province Economic Development Zone No. 99 North Road, Zhang Hua Patentee after: Qianjiang Fangyuan Titanium Co., Ltd. Address before: Wuhan City, Hubei province 430035 Gongnong Road, Qiaokou District No. 8 Patentee before: Fangyuan Titanium White Co., Ltd., Wuhan |