CN1091389C - Waste gas treating method for viscose fiber production - Google Patents
Waste gas treating method for viscose fiber production Download PDFInfo
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- CN1091389C CN1091389C CN98111064A CN98111064A CN1091389C CN 1091389 C CN1091389 C CN 1091389C CN 98111064 A CN98111064 A CN 98111064A CN 98111064 A CN98111064 A CN 98111064A CN 1091389 C CN1091389 C CN 1091389C
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- gas
- waste gas
- processing method
- gas processing
- acid bath
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Abstract
The present invention relates to a method for treating waste gas in the production of viscose fibers. The present invention is designed for simplifying a technology, reducing investments and increasing the treatment rate. The treatment method is characterized in that the method orderly comprises the procedures: vacuum analysis is carried out to an adhesive spinning acid bath in a degassing tower, analyzed acidic gas is conveyed to a combustor to be directly combusted into gas containing SO2 by compounding oxygen or air, gas containing SO2 is treated into Na2SO3 and H2SO4, and finally, tail gas is exhausted. The present invention has the advantages of simple technology, safety, reliability, large waste gas treatment rate, low investment of devices, low operation cost and high economic benefit.
Description
The present invention relates to contain H in the viscose rayon production
2S, CS
2Technical field of waste gas treatment.
Need drop into CS during the viscose staple fibre yellow
2Preparation viscose glue stoste, when the acid bath spinning, most CS in the viscose glue stoste
2Be gaseous state and discharge, will cause environmental pollution, so engineers and technicians adopt certain technical measures to handle the waste gas that produces in the production process of viscose fiber.As application number is that 92105374.6 Chinese patent " viscose rayon produce in waste gas processing method and device " disclose a kind of process and complexes thereof that are used for viscose rayon production waste gas pollution control and treatment, and it is by acid bath degas system, H
2S is converted into sulfur system and CS
2The absorption recovery system constitutes, and adopts base catalysis desulfurization and circulation catalysis behind the acid bath degas system, at CS
2The absorption recovery system reclaims with the cylindricality adsorbents adsorb.Its shortcoming is with H
2S is converted into sulphur and CS
2Absorption is reclaimed, and technological process is complicated, and equipment investment is big, the running expense height, and also byproduct sulphur is not the industrial chemicals that Viscose Fiber Plant needs, at H
2S is converted into sulfur system with base catalysis doctor solution circulation catalysis, so need to adopt special catalyst and doctor solution production cost height.And CS
2Be good molten sulphur agent, unfavorable sulphur is separated out, and adopts this method acid bath degassing, and power requirement is sent acid bath into degassing tower, we can say H
2S, CS
2Major part is not escaped before advancing degassing tower, and effect is on duty mutually.United States Patent (USP) Us5543122 proposes technical scheme will contain H
2S gas is divided into high concentration stage and low concentration stage, and the high concentration stage contains H
2S gas is oxidized to SO under hot environment
2, absorb generation HSO with alkaline solution again
3 -And SO
3 2-Salting liquid, H
2The low mist of S content generates sulphur with ferric complex catalysis, and this invention stresses the polyvalent metal complex compound and form, high-temperature oxydation is not specifically described, so this process be applied to viscose rayon produce in waste gas pollution control and treatment, also can run into CS equally
2Molten sulphur agent problem, and whole process flow is long, equipment is complicated, running expense and producing cost height.U.S. Pat 5514351 proposes technical scheme H
2The on-condensible gas that S content is high is not taked combustion method, earlier with 1/3rd H
2S generates SO at high-temperature oxydation
2, again at solid catalysis bed and remaining 1/3rd H
2S reaction generates sulphur, and tail gas send incinerator calcination discharging, and this method exists also that technological process is long, equipment is complicated and sulphur and CS
2Molten problem can not finely solve altogether, and sulphur is not again to produce the needed industrial chemicals of viscose rayon.
Therefore the object of the present invention is to provide that a kind of technology is simple, equipment investment is little, running expense is low, waste gas convert to viscose rayon produce in required industrial chemicals, thereby the viscose rayon that reduces producing cost produce in waste gas processing method.
Technical scheme of the present invention is to realize like this.Waste gas processing method during this viscose rayon is produced is characterized in that steps in sequence is: the CS after the viscose rayon spinning
2And H
2The acid bath liquid that S is saturated carries out vacuum analysis at degassing tower; The sour gas that parses is delivered to burner to be equipped with oxygen or air and directly to burn and become to contain SO
2Gas; To contain SO
2Gas treatment becomes useful chemical products, last exhaust emissions.
The above-mentioned SO that contains
2Gas can absorb preparation Na at the absorption tower spray with NaOH liquid
2SO
3Liquid or Catalytic Oxygen change into SO
3Produce H
2SQ
4Also can earlier sour gas be delivered to burner combustion through condenser condenses again except that after anhydrating, more than the 600mmHg, combustion temperature in hearth is more fortunately more than 600 ℃ more fortunately for vacuum analysis vacuum.
Waste gas processing method of the present invention adopts vacuum outgas, direct Ran Shao method, and technology is very simple, equipment investment is little, operating cost is low, and contains SO
2Gas can prepare Na
2SO
3Or/and H
2SO
4Liquid uses as the Viscose Fiber Plant raw material, turns waste into wealth, and reduces production costs, and reduces environmental pollution.
Description of drawings:
Fig. 1. waste gas processing method process chart during viscose rayon is produced.
Below in conjunction with accompanying drawing embodiments of the invention are described further.
At first the acid bath liquid after the spinning of viscose glue stoste carries out vacuum analysis at degassing tower, also cries vacuum outgas on the engineering, because most imitative silk machines outlet absolute altitude 6.5m, so better vacuum remains on more than the 600mmHg, and degassing efficiency height like this.The gas that parses is with H
2S, CS
2Be main.O wherein
2With H
2S, CS
2Component ratio makes sour gas belong to the outer fuel gas of explosive range.
The sour gas that to deviate from is delivered to burner and is equipped with oxygen or air and directly burns and become to contain SO then
2Gas, and control combustion temperature in hearth more than 600 ℃, be preferably in 600～800 ℃, each comhustible component is fully burnt, do not need catalyst.
To contain SO after the heat exchange
2Gas treatment becomes useful chemical products, last exhaust emissions.This contains SO
2Gas can absorb preparation Na at the absorption tower spray with NaOH liquid
2SO
3Liquid, but also Catalytic Oxygen changes into SO
3Absorb system H with the acid bath after the concentrated sulfuric acid or the degassing
2SO
4, the both is the raw material that Viscose Fiber Plant needs, Na
2SO
3Take off residual sulphur for the viscose rayon post processing and use H
2SO
4Can use for spinning acid bath.
The SO that contains that the degassing is burnt and produced
2Gas, after the heat exchange if all remove to convert to Na
2SO
3Liquid takes off residual sulphur usefulness, Na at that time for the viscose rayon post processing
2SO
3The liquid excess quantity is very big.And be further to enlarge the waste gas rate of recovery, can collect the part low concentration gas and the CS of spinning-drawing machine return tank and spinning-drawing machine
2The tail gas of condensation retracting device enters the catalysis firing device, containing SO in the exhaustless combustion furnace
2High-temperature gas elder generation preheating low concentration gas feeds the catalysis firing device again and keeps reaction temperature, low concentration gas is changed into contain SO
2Gas, common again Catalytic Oxygen changes into SO
3, produce H
2SO
4
Claims (7)
1. waste gas processing method during a viscose rayon is produced is characterized in that steps in sequence is:
A viscose rayon spinning acid bath liquid carries out vacuum analysis at degassing tower;
B delivers to burner with the sour gas that parses and is equipped with oxygen or air and directly burns and become to contain SO
2Gas;
C will contain SO
2Gas treatment becomes useful chemical products, last exhaust emissions.
2. waste gas processing method as claimed in claim 1 is characterized in that the described SO of containing
2Gas absorbs at the absorption tower spray with NaOH liquid produces Na
2SO
3Liquid.
3. waste gas processing method as claimed in claim 1 is characterized in that the described SO of containing
2Gas catalysis is oxidized to SO
3After produce H
2SO
4
4. waste gas processing method as claimed in claim 1 is characterized in that described sour gas removes through condenser condenses earlier to deliver to burner combustion again after anhydrating.
5. waste gas processing method as claimed in claim 1 is characterized in that described vacuum analysis vacuum is more than 600mmHg.
6. waste gas processing method as claimed in claim 1 is characterized in that described ignition temperature is more than 600 ℃.
7. waste gas processing method as claimed in claim 1 is characterized in that the described SO of containing
2Gas, part makes the CS that contains outside the acid bath degassing at the condition of high temperature heatable catalytic calcination bed that goes down
2And H
2S low concentration gas catalysis calcination becomes SO
2Gas enters catalytic oxidizing equipment more jointly and makes SO
3Gas is produced H
2SO
4
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111064A CN1091389C (en) | 1998-09-05 | 1998-09-05 | Waste gas treating method for viscose fiber production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111064A CN1091389C (en) | 1998-09-05 | 1998-09-05 | Waste gas treating method for viscose fiber production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1214274A CN1214274A (en) | 1999-04-21 |
| CN1091389C true CN1091389C (en) | 2002-09-25 |
Family
ID=5221072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98111064A Expired - Fee Related CN1091389C (en) | 1998-09-05 | 1998-09-05 | Waste gas treating method for viscose fiber production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1091389C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101732955A (en) * | 2008-11-04 | 2010-06-16 | 南京化纤股份有限公司 | Waste gas treatment device |
| CN105194974B (en) * | 2015-09-25 | 2017-07-07 | 杭州奥通环保科技有限公司 | A kind of carbon disulfide waste gas vacuum desorption processing unit and processing method |
| CN106587114B (en) * | 2016-12-07 | 2018-03-16 | 锦西化工研究院有限公司 | The method for preparing sodium sulfite solution using polysulfide rubber polymeric mother liquid acidifying gas |
| CN110155957B (en) * | 2019-06-18 | 2022-08-09 | 赛得利（福建）纤维有限公司 | Method for preparing sulfuric acid by using zinc-containing wastewater and NaHS waste liquid in viscose fiber factory |
| CN113058424A (en) * | 2021-03-26 | 2021-07-02 | 新疆中泰创新技术研究院有限责任公司 | Method and system for treating waste gas generated in production of viscose fibers containing hydrogen sulfide and carbon disulfide |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070129A (en) * | 1992-07-15 | 1993-03-24 | 江西省纺织工业科研设计院 | Exhaust gas treatment method and device during viscose rayon is produced |
| US5514351A (en) * | 1992-04-15 | 1996-05-07 | Mobil Oil Corporation | Desulfurizing tailgas from sulfur recovery unit |
| US5543122A (en) * | 1994-11-09 | 1996-08-06 | The Dow Chemical Company | Process for the removal of h2 S from non-condensible gas streams and from steam |
-
1998
- 1998-09-05 CN CN98111064A patent/CN1091389C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5514351A (en) * | 1992-04-15 | 1996-05-07 | Mobil Oil Corporation | Desulfurizing tailgas from sulfur recovery unit |
| CN1070129A (en) * | 1992-07-15 | 1993-03-24 | 江西省纺织工业科研设计院 | Exhaust gas treatment method and device during viscose rayon is produced |
| US5543122A (en) * | 1994-11-09 | 1996-08-06 | The Dow Chemical Company | Process for the removal of h2 S from non-condensible gas streams and from steam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1214274A (en) | 1999-04-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| IP01 | Partial invalidation of patent right |
Decision date of declaring invalidation: 20060530 Decision number of declaring invalidation: 8342 Case number: 4W01200 4W01201 4W01202 Conclusion of examination: Claims declared invalid claim 7 1-6, maintain effective. Decision date: 20060530 Denomination of invention: Waste gas treating method for viscose fiber production Granted publication date: 20020925 Patentee: Huang Yilin Review decision number: 8342 |
|
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG FULIDA FIBER CO., LTD. Free format text: FORMER OWNER: HUANG YILIN Effective date: 20070706 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 311228 Linjiang Industrial Park, Hangzhou, Zhejiang, Xiaoshan Patentee after: Zhejiang Fulida Fiber Co., Ltd. Address before: 311228 Linjiang Industrial Park, Hangzhou, Zhejiang, Xiaoshan Patentee before: Zhejiang Fulida Fabric Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020925 Termination date: 20130905 |