CN101054167A - Technique for extracting high-purity hydrogen sulfide - Google Patents
Technique for extracting high-purity hydrogen sulfide Download PDFInfo
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- CN101054167A CN101054167A CN 200710015806 CN200710015806A CN101054167A CN 101054167 A CN101054167 A CN 101054167A CN 200710015806 CN200710015806 CN 200710015806 CN 200710015806 A CN200710015806 A CN 200710015806A CN 101054167 A CN101054167 A CN 101054167A
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Abstract
The invention discloses a process for producing high-pure sulfureted hydrogen, which solved the problems of improving the complex present process for producing high-pure sulfureted hydrogen, low yield and big pollution to the environment etc. The process in the invention has the advantages of simple processing, high purity of produced sulfureted hydrogen gas, high yield of the product and small pollution to the environment. The method is to improve the purity of sulfureted hydrogen to be equal to or higher than 90% by reproduction step by step after absorption under certain pressure by using NHD as the absorbent.
Description
Technical field
The present invention relates to a kind of hydrogen sulfide novel technology for extracting, relate in particular to a kind of with hydrogen sulfide containing mixed gas by its concentration be 10～50% carry dense to 〉=90% technique for extracting high-purity hydrogen sulfide.
Background technology
Present many chemical industries need be used high purity hydrogen sulfide, be mainly used to produce mercaptan, thioether, methionine(Met), heavy water, high-purity zinc sulphide, high purity sodium sulfide and other downstream fine chemical products, being used for the manufacturing of large-scale integrated circuit and the production of the glorious powder of colour picture tube in electronic industry, also is the important source material of synthetic thioxine dyes.And traditional high-pure hydrogen sulfide production technique mainly is three kinds, and a kind of is to adopt pure liquid sulfur and high-purity hydrogen reaction; A kind of is to adopt barium sulphide and acid-respons to generate; Another kind utilizes that hydrogen sulfide containing partial pressure difference is compressed step by step, rectifying.These several technologies have their own characteristics each, but in requisition for hydrogen manufacturing, system sulphur, high-tension apparatus and supplementary unit are more.
Summary of the invention
Problems such as purpose of the present invention is exactly in order to solve present preparation high-pure hydrogen sulfide complex process, and yield rate is low, and environmental pollution is bigger, provide that a kind of to have technology simple, hydrogen sulfide purity height, the yield rate height of product, the technique for extracting high-purity hydrogen sulfide of advantage such as environmental pollution is little.
For achieving the above object, the present invention adopts following technology:
A kind of technique for extracting high-purity hydrogen sulfide, its method be,
1) with the sour gas of sulfide hydrogen 10～50% after separator separates, the absorption tower is sent in pressurization;
2) after hydrogen sulfide entered the absorption tower, with the regeneration degree＜10mg/l normal temperature NHD solvent counter current contact of top spray, gained NHD rich solution sent next procedure; Gained exhaust emissions up to standard;
3) the NHD rich solution is carried out the multi-step pressure reduction flash distillation, carry out gas-liquid separation then, rich solution enters regenerator column after heating;
4) hydrogen sulfide that contains a large amount of saturated steams on regenerator column top is made product gas, concentration 〉=90% after water-cooled, separation; Isolating phlegma is sent regeneration overhead back to as phegma; Outlet NHD rich solution is cooled to normal temperature more step by step and sends into the absorption tower; NHD lean solution after the regeneration after pressurization is cooled to normal temperature successively, is sent into absorption tower circulation absorbing hydrogen sulphide after the interchanger heat exchange.
In the described step 1), the sour gas of sulfide hydrogen 10～50% is pressurized to the 0.6-0.9MPA gauge pressure; The absorption tower temperature is a normal temperature.
In the described step 3), the multi-step pressure reduction flash vaporization process is, absorbed the NHD rich solution of hydrogen sulfide and amounts of carbon dioxide gas, sends into flash drum I at normal temperatures, and its working pressure is 0.1～0.5MPA gauge pressure, carries out the flash distillation first time; Continuing temperature raising to 50～100 ℃, enter flash drum II, is to carry out the flash distillation second time under 0～0.2MPA gauge pressure at pressure; Gained gas is sent into step 1) as unstripped gas by compressor after the gas-liquid separation, and the gained rich solution is heated to 80～130 ℃ and enters regenerator column.
In the described step 4), regenerator column adopts hot regeneration, 110～140 ℃ of column bottom temperatures, regenerator column pressure≤30KPA gauge pressure.
The present invention is directed to the lower gas of present sulfide hydrogen concentration, adopt NHD, after under certain pressure, absorbing,, concentration of hydrogen sulfide is carried to 〉=90% by step-down temperature raising regeneration step by step as absorption agent.
The invention has the beneficial effects as follows: utilize the NHD solvent to select the characteristic of absorbing hydrogen sulphide and carbonic acid gas, technical process is feasible, and pressure is low, and energy consumption is little, and flow process is brief, hydrogen sulfide purity height, and environmental pollution is few.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Wherein, 1. absorption tower, 2. flash drum I, 3. flash drum II, 4. regenerator column, 5. reboiler, 6. backflow tank, 7. product gas separating device, 8. water cooler, 9. compressor, 10. interchanger, 11. impeller pumps.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
Among Fig. 1, with the sour gas of sulfide hydrogen 10～50% behind separator, be pressurized to the 0.6-0.9MPA gauge pressure through feed gas compressor, enter absorption tower 1 and regeneration degree＜10mg/l normal temperature NHD solvent counter current contact that top sprays, absorb most of hydrogen sulfide and a spot of carbon dioxide gas in the gas mixture.Absorption tower 1 is a normal temperature, absorbs back exhaust emissions up to standard.
Absorbed the NHD rich solution of hydrogen sulfide and amounts of carbon dioxide gas, through interchanger 10 heating, sent into flash drum I2 at normal temperatures, its working pressure is 0.1～0.5MPA gauge pressure, carries out the flash distillation first time; Continuing temperature raising to 50～100 ℃, enter flash drum II3, is to carry out the flash distillation second time under 0～0.2MPA gauge pressure at pressure; Gained gas is sent into step 1) as unstripped gas by compressor 9 after the gas-liquid separation, and the gained rich solution is heated to 80～130 ℃ and enters regenerator column 4.
In regenerator column 4,110～140 ℃ of control regeneration column bottom temperatures, regenerator column pressure≤30KPA gauge pressure, the hydrogen sulfide that contains a large amount of saturated steams on its top through water cooler 8 coolings with after product gas separating device 7 separates, obtain the product gas of concentration 〉=90%, send into next procedure.Product gas separating device 7 isolating phlegmas are sent into backflow tank 6, send regenerator column 4 tops back to as phegma by impeller pump 11.
NHD after regeneration outlet rich solution is cooled to normal temperature step by step and sends into the absorption tower, and lean solution then after heater via 10 heat exchange, is sent into absorption tower 1 circulation absorbing hydrogen sulphide through impeller pump 11 pressurizations, interchanger 10, water cooler 8, impeller pump 11 after pressurizeing successively.
Claims (4)
1, a kind of technique for extracting high-purity hydrogen sulfide is characterized in that: its method is,
1) with the sour gas of sulfide hydrogen 10～50% after separator separates, the absorption tower is sent in pressurization;
2) after hydrogen sulfide entered the absorption tower, with the regeneration degree＜10mg/l normal temperature NHD solvent counter current contact of top spray, gained NHD rich solution sent next procedure; Gained exhaust emissions up to standard;
3) the NHD rich solution is carried out the multi-step pressure reduction flash distillation, carry out gas-liquid separation then, rich solution enters regenerator column after heating;
4) hydrogen sulfide that contains a large amount of saturated steams on regenerator column top is made product gas, its concentration 〉=90% after water-cooled, separation; Isolating phlegma is sent regeneration overhead back to as phegma; Outlet NHD rich solution is cooled to normal temperature more step by step and sends into the absorption tower; NHD lean solution after the regeneration after pressurization is cooled to normal temperature successively, is sent into absorption tower circulation absorbing hydrogen sulphide after the interchanger heat exchange.
2, technique for extracting high-purity hydrogen sulfide according to claim 1 is characterized in that: in the described step 1), the sour gas of sulfide hydrogen 10～50% is pressurized to the 0.6-0.9MPA gauge pressure; The absorption tower temperature is a normal temperature.
3, technique for extracting high-purity hydrogen sulfide according to claim 1, it is characterized in that: in the described step 3), the multi-step pressure reduction flash vaporization process is, absorbed the NHD rich solution of hydrogen sulfide and amounts of carbon dioxide gas, send into flash drum I at normal temperatures, its working pressure is 0.1～0.5MPA gauge pressure, carries out the flash distillation first time; Continuing temperature raising to 50～100 ℃, enter flash drum II, is to carry out the flash distillation second time under 0～0.2MPA gauge pressure at pressure; Gained gas is sent into step 1) as unstripped gas by compressor after the gas-liquid separation, and the gained rich solution is heated to 80～130 ℃ and enters regenerator column.
4, technique for extracting high-purity hydrogen sulfide according to claim 1 is characterized in that: in the described step 4), regenerator column adopts hot regeneration, 110～140 ℃ of column bottom temperatures, regenerator column pressure≤30KPA gauge pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710015806 CN101054167A (en) | 2007-05-30 | 2007-05-30 | Technique for extracting high-purity hydrogen sulfide |
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| CN 200710015806 CN101054167A (en) | 2007-05-30 | 2007-05-30 | Technique for extracting high-purity hydrogen sulfide |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537174A (en) * | 2013-11-07 | 2014-01-29 | 中国海洋石油总公司 | Gas purification system capable of recycling raw material gas |
| CN104016310A (en) * | 2014-06-05 | 2014-09-03 | 鲁西化工集团股份有限公司 | Method for selectively producing sodium sulfide or sodium hydrosulfide by utilizing industrial waste gas of ammonia synthesis |
| CN106823691A (en) * | 2017-02-21 | 2017-06-13 | 西南化工研究设计院有限公司 | A kind of method of hydrogen sulfide gas concentrate |
| CN107754558A (en) * | 2016-08-19 | 2018-03-06 | 中国石油化工股份有限公司 | A kind of NHD desulfurization concentrating method |
| CN109943375A (en) * | 2019-03-07 | 2019-06-28 | 四川迅升油气工程技术有限公司 | A kind of device and its technique for sulfur-containing gas individual well desulfurization relieving haperacidity |
-
2007
- 2007-05-30 CN CN 200710015806 patent/CN101054167A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537174A (en) * | 2013-11-07 | 2014-01-29 | 中国海洋石油总公司 | Gas purification system capable of recycling raw material gas |
| CN103537174B (en) * | 2013-11-07 | 2016-07-13 | 中国海洋石油总公司 | The gas purge system that a kind of unstripped gas can be recycled |
| CN104016310A (en) * | 2014-06-05 | 2014-09-03 | 鲁西化工集团股份有限公司 | Method for selectively producing sodium sulfide or sodium hydrosulfide by utilizing industrial waste gas of ammonia synthesis |
| CN104016310B (en) * | 2014-06-05 | 2015-10-21 | 鲁西化工集团股份有限公司 | A kind of ammonia synthesizing industry waste gas selectivity produces the method for sodium sulphite or Sodium sulfhydrate |
| CN107754558A (en) * | 2016-08-19 | 2018-03-06 | 中国石油化工股份有限公司 | A kind of NHD desulfurization concentrating method |
| CN107754558B (en) * | 2016-08-19 | 2020-10-20 | 中国石油化工股份有限公司 | Desulfurization and concentration method of polyethylene glycol dimethyl ether |
| CN106823691A (en) * | 2017-02-21 | 2017-06-13 | 西南化工研究设计院有限公司 | A kind of method of hydrogen sulfide gas concentrate |
| CN106823691B (en) * | 2017-02-21 | 2019-07-16 | 西南化工研究设计院有限公司 | A kind of method of hydrogen sulfide gas concentrate |
| CN109943375A (en) * | 2019-03-07 | 2019-06-28 | 四川迅升油气工程技术有限公司 | A kind of device and its technique for sulfur-containing gas individual well desulfurization relieving haperacidity |
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