CN103540378A - Methane-rich gas wet desulphurization comprehensive utilization technology - Google Patents
Methane-rich gas wet desulphurization comprehensive utilization technology Download PDFInfo
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- CN103540378A CN103540378A CN201210258917.2A CN201210258917A CN103540378A CN 103540378 A CN103540378 A CN 103540378A CN 201210258917 A CN201210258917 A CN 201210258917A CN 103540378 A CN103540378 A CN 103540378A
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- desulphurization
- methane
- rich gas
- comprehensive utilization
- gas wet
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Abstract
The invention relates to a methane-rich gas wet desulphurization comprehensive utilization technology. Based on the fine desulphurization property, zinc oxide desulphurization is always the research center of desulphurization technology, ZnO adsorbent is used for desulphurization directly in currently used zinc oxide absorption technology, the ZnO adsorbent is changed after losing effectiveness, most saturated adsorbents are abandoned due to difficulty in regeneration, such technology is effective in desulphurization, but has high adsorbent cost and small adsorption capacity. The methane-rich gas wet desulphurization comprehensive utilization technology is generalized as follows: based on Zn(NO3)2 solution as a desulfurizer, realizing efficient removal of H2S in a form of ZnS precipitate with low solubility product through reaction of Zn<2+> and S<2-> dissolved in solution; simultaneously, introducing the nano ZnS production technology in reaction, and periodically separating ZnS precipitate to prepare nano ZnS powder; preparing a new desulfurizer from the separated waste acid, and reducing the desulphurization system for recycling. Thus, desulphurization capacity is increased, operation cycle is prolonged, desulphurization cost is lowered, and circulating benefit economy is realized.
Description
Technical field:
The present invention relates to a kind of methane-rich gas desulfurization technology field.
Background technology:
China exist a large amount of that disperse, be located in that remote, the unsettled associated gas of tolerance, oil field are dropped a hint, coal-seam gas, mine gas, refuse embedded gas, biogas, Water Soluble Gas etc., we are referred to as " high methane gas " by system.Methane-rich gas can improve the relative content of methane in its composition after deep purifying, increases its calorific value.The main task of methane-rich gas purge process comprises: remove hydrogen sulfide, carbonic acid gas and water and other not combustion-supporting impurity.
Zinc oxide desulfurization is the research centre of desulfurization technology with the characteristic of its smart desulfurization always, compares with gac with dry oxidation iron, and zinc oxide desulfurization technology is looser to the requirement of processing condition, can reach the requirement of smart desulfurization in wide temperature range.The zinc oxide adsorption technology adopting is at present directly to use the desulfurization of ZnO sorbent material, changed, and saturated sorbent material has been abandoned mostly because of the difficulty of regenerating after inefficacy, and this technology desulfurization is very effective, but sorbent material cost is high, loading capacity is little.Thereby raising desulfurization capacity, extend the cycle of operation, reduce the main direction that desulphurization cost just becomes biogas desulfurization.
The direct transition type semiconductor compound of zinc sulphide (ZnS) ShiII B-VIA family, within the scope of 8～12 mum wavelengths, there is good ir transmissivity, and there is a high fusing point, can be used as material of infrared window, be widely used in and made light antireflection coating, high power infrared laser window and Infrared pod window and guided missile light shield etc.
Summary of the invention:
Be directed to this, the object of the present invention is to provide a kind of methane-rich gas wet desulphurization comprehensive utilization technique.
For achieving the above object, the present invention is achieved through the following technical solutions:
With ZnNO
3solution is made sweetening agent, passes through Zn
2+with the S dissolving in solution
2-reaction, realizes H with the form of the ZnS precipitation of low solubility product
2s efficiently removes; In reaction, introduce nanometer ZnS production technology, regularly separation of Zn S precipitation, makes nanometer ZnS powder simultaneously; Spent acid solution after separation is for the preparation of new sweetening agent, and reduction and desulfurization system, recycles.
Described Zn
2+with S
2-reaction, temperature of reaction is 80 ℃.
Described nanometer ZnS production technology is homogeneous precipitation method.
Described regular separation of Zn S precipitation, twice disengaging time is spaced apart 72 hours.
Spent acid solution after described separation is prepared new sweetening agent, and its method is, with oxide compound or the oxyhydroxide of spent acid solution solving zinc.
Owing to adopting technique scheme, the present invention has following beneficial effect:
1, the present invention is a kind of methane-rich gas wet desulphurization comprehensive utilization technique, for developing biomass energy, replaces Sweet natural gas to have positive effect;
2, the present invention adopts ZnNO
3solution is made sweetening agent, introduces nanometer ZnS production technology in reaction, makes nanometer ZnS powder, can be as wide bandgap semiconductor materials for numerous areas such as solar cell, photoelectric material, material of infrared window, chemical materialss;
3. the spent acid solution after desulphurization reaction, for the preparation of new sweetening agent, repeats to recycle, so this technology can fully reclaim desulfurization waste liquor, improved desulfurization capacity, extend the cycle of operation of sweetening agent, reduced desulphurization cost, realized circulating benefit economy.
Below,, to a kind of methane-rich gas wet desulphurization of the present invention comprehensive utilization technique, be described further in conjunction with the embodiments.
Embodiment:
Configure certain density ZnNO
3solution, adds absorption reaction still, ZnNO in reactor
3the height of solution should remain on container height more than 2/3rds.Open heating control apparatus and treat that system reaches 80 ℃, from reactor bottom, pass into the methane-rich gas that needs desulfurization, from tower top, discharge, make ZnNO
3adsorption liquid fully contacts with methane-rich gas reverse convection, to H
2s carries out deep removal reaction, reacts precipitation separation ZnS after 72 hours, makes nanometer ZnS powder.After spent acid solution dissolved oxygen zinc after separation, discharge Zn
2+, rejoining reactor, reduction and desulfurization system, carries out recycle.
Claims (5)
1. a methane-rich gas wet desulphurization comprehensive utilization technique, is characterized in that: with ZnNO
3solution is made sweetening agent, passes through Zn
2+with the S dissolving in solution
2-reaction, realizes H with the form of the ZnS precipitation of low solubility product
2s efficiently removes; In reaction, introduce nanometer ZnS production technology, regularly separation of Zn S precipitation, makes nanometer ZnS powder simultaneously; Spent acid solution after separation is for the preparation of new sweetening agent, and reduction and desulfurization system, recycles.
2. a kind of methane-rich gas wet desulphurization comprehensive utilization technique according to claim 1, is characterized in that described Zn
2+with S
2-reaction, temperature of reaction is 80 ℃.
3. a kind of methane-rich gas wet desulphurization comprehensive utilization technique according to claim 1, is characterized in that, described nanometer ZnS production technology is homogeneous precipitation method.
4. a kind of methane-rich gas wet desulphurization comprehensive utilization technique according to claim 1, is characterized in that, described regular separation of Zn S precipitation, and twice disengaging time is spaced apart 72 hours.
5. a kind of methane-rich gas wet desulphurization comprehensive utilization technique according to claim 1, is characterized in that, the spent acid solution after described separation is prepared new sweetening agent, and its method is, with oxide compound or the oxyhydroxide of spent acid solution solving zinc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210258917.2A CN103540378A (en) | 2012-07-13 | 2012-07-13 | Methane-rich gas wet desulphurization comprehensive utilization technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210258917.2A CN103540378A (en) | 2012-07-13 | 2012-07-13 | Methane-rich gas wet desulphurization comprehensive utilization technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103540378A true CN103540378A (en) | 2014-01-29 |
Family
ID=49964251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210258917.2A Pending CN103540378A (en) | 2012-07-13 | 2012-07-13 | Methane-rich gas wet desulphurization comprehensive utilization technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103540378A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02218417A (en) * | 1989-02-20 | 1990-08-31 | Nittetsu Mining Co Ltd | Method for removing hydrogen sulfide in flue gas |
| US20020018853A1 (en) * | 1999-06-30 | 2002-02-14 | Khare Gyanesh P. | Sulfur sorbent composition and sorption process |
| CN101058078A (en) * | 2006-04-18 | 2007-10-24 | 向松 | Addend preparation method and process for wet oxidation-desulfurizing catalyst |
-
2012
- 2012-07-13 CN CN201210258917.2A patent/CN103540378A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02218417A (en) * | 1989-02-20 | 1990-08-31 | Nittetsu Mining Co Ltd | Method for removing hydrogen sulfide in flue gas |
| US20020018853A1 (en) * | 1999-06-30 | 2002-02-14 | Khare Gyanesh P. | Sulfur sorbent composition and sorption process |
| CN101058078A (en) * | 2006-04-18 | 2007-10-24 | 向松 | Addend preparation method and process for wet oxidation-desulfurizing catalyst |
Non-Patent Citations (2)
| Title |
|---|
| 孙秋君 等: "沼气脱硫技术的研究进展", 《现代化工》 * |
| 李亚玲 等: "超重力法制备纳米硫化锌", 《无机材料学报》 * |
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Address after: Chengdu City, Sichuan province Jinniu District 610075 Bridge Road twelve Huashen building A, 3F Applicant after: Zou Hanping Address before: 264003, No. 1, Jin Du Road, Sheng Quan Industrial Park, Laishan District, Shandong, Yantai Applicant before: Zou Hanping |
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