CN103537174A - Gas purification system capable of recycling raw material gas - Google Patents
Gas purification system capable of recycling raw material gas Download PDFInfo
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- CN103537174A CN103537174A CN201310551598.9A CN201310551598A CN103537174A CN 103537174 A CN103537174 A CN 103537174A CN 201310551598 A CN201310551598 A CN 201310551598A CN 103537174 A CN103537174 A CN 103537174A
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Abstract
The invention discloses a gas purification system capable of recycling a raw material gas. The gas purification system comprises a raw material gas mixing tank, an absorption tower, a regeneration tower and a rich solution flash evaporation tank, wherein the purified gas outlet at the tower top of the absorption tower is sequentially communicated with a purified gas cooler and a purifier and separator, and the gas outlet of the purifier and separator is communicated with the raw material gas mixing tank; the tower top of the regeneration tower and the acid gas outlet of the rich solution flash evaporation tank are communicated with the raw material gas mixing tank; the rich solution outlet at the tower bottom of the absorption tower is sequentially communicated with a throttle valve, the rich solution flash evaporation tank, a filter and a lean/rich solution heat exchanger, and the outlet of the lean/rich solution heat exchanger is communicated with the top of the regeneration tower; the raw material gas outlet of the raw material gas mixing tank passes through a raw material gas compressor and then is communicated with the bottom of the absorption tower. The gas purification system disclosed by the invention can solve the defects in the prior art; by regulating the pressure of purified gas and enabling the purified gas and an acid gas to enter the raw material gas mixing tank for mixing, the acid gas after mixing enters a pressure increasing device in a unified manner for increasing the pressure, so that the recycling of all the raw material gas can be realized to the greatest extent, and the emission of waste gas can be further reduced.
Description
Technical field
The present invention relates to the gas purge system that a kind of unstripped gas can be recycled.
Background technology
In actual industrial production, have many fields all to relate to gas cleaning and process, most of technological process all will be carried out experimental study before putting into production, by experiment for actual production provides reference.There are at present many patents for gaseous deacidification treatment process experimental study, but the unstripped gas that uses is all disposable in experimentation, after experiment finishes, process or discharge, can not realize recycling of unstripped gas, causing the waste of unstripped gas and the pollution of environment.Therefore, realize recycling of experimentation Raw gas and can save to a great extent experimental cost, reduce the pollution of environment etc.
Summary of the invention
The object of this invention is to provide the gas purge system that a kind of unstripped gas can be recycled, the present invention can realize and absorb recycling of tower top purified gas and regeneration overhead acid gas, saves the energy and experimental cost, guarantees the recycling of gas.
The gas purge system that a kind of unstripped gas provided by the present invention can be recycled, comprises unstripped gas blending tank, absorption tower, regenerator and rich solution flash tank;
The clean gas outlet of described absorption tower tower top is connected with purified gas cooler and clarifier separator successively, and the gas vent of described clarifier separator is connected with described unstripped gas blending tank;
The acid gas outlet of described regenerator tower top and described rich solution flash tank is all connected with described unstripped gas blending tank;
Rich solution outlet at the bottom of described absorbing tower is connected with choke valve, described rich solution flash tank, filter and lean/rich liquid heat exchanger successively, and the outlet of described lean/rich liquid heat exchanger is connected with the top of described regenerator;
Lean solution outlet at the bottom of described regenerator tower is connected with described lean/rich liquid heat exchanger, lean solution cooler, amine liquid storage tank and lean pump successively, and described lean solution delivery side of pump is connected with the tower top on described absorption tower;
The unstripped gas outlet of described unstripped gas blending tank is by being connected with the bottom on described absorption tower after feed gas compressor.
In above-mentioned gas purge system, between described feed gas compressor and described absorption tower, be connected with feed gas chiller and unstripped gas surge tank in turn.
In above-mentioned gas purge system, described unstripped gas surge tank is also connected with unstripped gas air distribution system, and described unstripped gas air distribution system comprises CH
4gas cylinder, CO
2gas cylinder, H
2the pure gas gas cylinders such as S gas cylinder and COS gas cylinder, according to different experimental study objects, pass into different gas in described unstripped gas blending tank by unstripped gas proportion requirement.
In above-mentioned gas purge system, described former glassware blending tank is provided with sample tap, pressure instrumentation and temperature instrument; In unstripped gas cyclic process, sample by described sample tap, analyze unstripped gas and form, suitably adjust the gas supply of gas cylinder, to supplement the gas loss in experimentation, realize stablizing, recycling of unstripped gas.
In above-mentioned gas purge system, the clean gas outlet of described absorption tower tower top is connected with a control valve, between described control valve and described purified gas cooler, is connected with pressure instrumentation.
In above-mentioned gas purge system, on the pipeline of the acid gas of described regenerator tower top and described rich solution flash tank outlet, be connected with pressure instrumentation.
In above-mentioned gas purge system, described filter can be active carbon filter and mechanical filter.
In above-mentioned gas purge system, the acid gas of described regenerator tower top and described rich solution flash tank outlet also with a H
2s tourie is connected, and when not needing to carry out unstripped gas circulation time, can carry out H
2the absorption of S, remaining gas is diffused processing.
In prior art, the acid gas of regeneration overhead is high CO
2or H
2the low-pressure low flow gas of S content, it is very large that difficulty is reclaimed in the supercharging of gas, if supercharging equipment supercharging is set separately in acid gas cyclic process, can greatly raise the cost.Gas purge system of the present invention has solved above-mentioned technical problem, by by after purified gas pressure regulation, entering unstripped gas blending tank together with acid gas mixes, mixed acid gas unification enters supercharging equipment and carries out supercharging, and then can realize the whole of unstripped gas as far as possible and recycle, thereby reduce the discharge of waste gas.
Accompanying drawing explanation
Fig. 1 is the flow chart of the gas purge system that can be recycled of unstripped gas of the present invention.
In figure, each mark is as follows:
V-01 unstripped gas blending tank, V-02 purge gas separator, V-03 unstripped gas surge tank, V-04 rich solution flash tank, V-05 amine liquid storage tank, V-06 return tank, V-07H2S tourie, C-01 feed gas compressor, E-01 feed gas chiller, E-02 purified gas cooler, E-03 lean solution cooler, E-04 poor rich liquid heat exchanger, E-05 reflux condenser, E-06 reboiler, T-01, T-02 absorption tower, P-01 lean pump, P-02 overhead reflux pump, F-01 active carbon filter, F-02 mechanical filter.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, but the present invention is not limited to following examples.
As shown in Figure 1, the gas purge system that unstripped gas of the present invention can be recycled comprises unstripped gas blending tank V-01, absorption tower T-01 and T-02, regenerator T-03 and rich solution flash tank V-04.
On former glassware blending tank V-01, be provided with sample tap (not marking in figure), pressure instrumentation (not marking in figure) and temperature instrument (not marking in figure); In unstripped gas cyclic process, sample by sample tap, analyze unstripped gas and form, suitably adjust the gas supply of gas cylinder, to supplement the gas loss in experimentation, realize stablizing, recycling of unstripped gas.The clean gas outlet of absorption tower T-01 tower top is connected with control valve, purified gas cooler E-02 and clarifier separator V-02 successively, between control valve and purified gas cooler E-02, be connected with pressure instrumentation (not marking in figure), the gas vent of clarifier separator V-02 is connected with unstripped gas blending tank V-01.The acid gas outlet of regenerator T-03 tower top and rich solution flash tank V-04 is all connected with unstripped gas blending tank V-01, and is provided with pressure instrumentation on the pipeline being connected at this.Rich solution outlet at the bottom of the T-01 tower of absorption tower is connected with choke valve, rich solution flash tank V-04, active carbon filter F-01, mechanical filter F-02 and lean/rich liquid heat exchanger E-04 successively, and the outlet of this lean/rich liquid heat exchanger E-04 is connected with the top of regenerator T-03.And the outlet of the lean solution at the bottom of regenerator T-03 tower is connected with lean/rich liquid heat exchanger E-04, lean solution cooler E-03, amine liquid storage tank V-05 and lean pump P-01 successively, and the outlet of this lean pump P-01 is connected with the tower top of absorption tower T-01.
In gas purge system of the present invention, unstripped gas surge tank V-01 is also connected with unstripped gas air distribution system, and this unstripped gas air distribution system comprises CH
4gas cylinder, CO
2gas cylinder, H
2the pure gas gas cylinders such as S gas cylinder and COS gas cylinder, according to different experimental study objects, pass into different gas in unstripped gas blending tank V-01 by unstripped gas proportion requirement.
In gas purge system of the present invention, the acid gas of regenerator T-03 tower top and rich solution flash tank V-04 outlet also with a H
2s tourie V-07 is connected, and when not needing to carry out unstripped gas circulation time, can carry out H
2the absorption of S, remaining gas is diffused processing.
At present, most of gas purifying technique all needs to carry out by experiment the research of operating parameter and treatment effect before putting into production, and describes use procedure of the present invention below in detail.
When the present invention carries out the research of natural gas Pretreatment Test, mainly comprise following process:
When experiment has just started, first by each pure gas bottle, in unstripped gas blending tank V-01, pass into gas, make the inlet gas of absorption tower T-01 and T-02 meet traffic requirement, along with the increase of gas yield, cut off the supply of gas cylinder gas.In unstripped gas cyclic process, sample by sample tap, analyze unstripped gas and form, suitably adjust the gas supply of gas cylinder, to supplement the gas loss in experimentation, realize stablizing, recycling of unstripped gas.
After unstripped gas stable circulation, from the purified gas of absorption tower T-01 and T-02 tower top because pressure is higher, first need by control valve by Pressure Drop near raw gas pressure.Though unstripped gas has certain temperature-fall period after pressure regulation, but still higher than unstripped gas temperature, need to enter purified gas cooler E-02 and carry out further cooling processing.Gas may be with the impurity such as some water vapour or absorbent in purification process, and therefore after condensation, passing into purge gas separator V-02 removes the impurity in purified gas.Purified gas after above-mentioned processing can pass into unstripped gas surge tank V-01 and recycle as unstripped gas.
After gathering from the acid gas of regenerator T-03 tower top and acid gas from rich solution flash tank V-04, focus on.Mix acid gas because pressure is lower, supercharging equipment is set cost is increased.Therefore mixed acid gas being passed into together with tower top purified gas to unstripped gas blending tank V-01 mixes.Mixed acid gas enters feed gas compressor C-01 and carries out supercharging, realizes the circulation of unstripped gas.
The sample tap arranging on unstripped gas blending tank, gas in cyclic process is carried out to sample analysis, when if variety classes gas ratio is undesirable, the pure gas gas cylinder by variety classes gas supplements in good time, to guarantee component and the traffic requirement of unstripped gas.
The circular regeneration of absorbent: enter the regenerative process that regenerator T-03 top of tower carries out absorbent successively after choke valve, rich solution flash tank V-04, active carbon filter F-01, mechanical filter F-02, lean/rich liquid heat exchanger E-04 from the rich solution at the bottom of absorbing tower.Lean solution from regenerator T-03 bottom enters absorption tower tower top through lean/rich liquid heat exchanger E-04, amine liquid storage tank V-05, lean solution cooler E-03, lean pump P-01 successively.
The processing of tail gas: top, absorption tower purified gas, regenerator and rich solution flash drum overhead acid gas are all connected with gas diffusion system, are first connected with H for acid gas
2s tourie, carries out H
2the absorption of S, remaining gas is diffused processing.
Claims (8)
1. the gas purge system that unstripped gas can be recycled, is characterized in that: described gas purge system comprises unstripped gas blending tank, absorption tower, regenerator and rich solution flash tank;
The clean gas outlet of described absorption tower tower top is connected with purified gas cooler and clarifier separator successively, and the gas vent of described clarifier separator is connected with described unstripped gas blending tank;
The acid gas outlet of described regenerator tower top and described rich solution flash tank is all connected with described unstripped gas blending tank;
Rich solution outlet at the bottom of described absorbing tower is connected with choke valve, described rich solution flash tank, filter and lean/rich liquid heat exchanger successively, and the outlet of described lean/rich liquid heat exchanger is connected with the top of described regenerator;
Lean solution outlet at the bottom of described regenerator tower is connected with described lean/rich liquid heat exchanger, lean solution cooler, amine liquid storage tank and lean pump successively, and described lean solution delivery side of pump is connected with the tower top on described absorption tower;
The unstripped gas outlet of described unstripped gas blending tank is by being connected with the bottom on described absorption tower after feed gas compressor.
2. gas purge system according to claim 1, is characterized in that: between described feed gas compressor and described absorption tower, be connected with feed gas chiller and unstripped gas surge tank in turn.
3. gas purge system according to claim 1 and 2, is characterized in that: described unstripped gas surge tank is also connected with unstripped gas air distribution system, and described unstripped gas air distribution system comprises CH
4gas cylinder, CO
2gas cylinder, H
2s gas cylinder and COS gas cylinder.
4. according to the gas purge system described in any one in claim 1-3, it is characterized in that: described former glassware blending tank is provided with sample tap, pressure instrumentation and temperature instrument.
5. according to the gas purge system described in any one in claim 1-4, it is characterized in that: the clean gas outlet of described absorption tower tower top is connected with a control valve, between described control valve and described purified gas cooler, be connected with pressure instrumentation.
6. according to the gas purge system described in any one in claim 1-5, it is characterized in that: on the pipeline of the acid gas outlet of described regenerator tower top and described rich solution flash tank, be connected with pressure instrumentation.
7. according to the gas purge system described in any one in claim 1-6, it is characterized in that: described filter is active carbon filter and mechanical filter.
8. according to the gas purge system described in any one in claim 1-7, it is characterized in that: the outlet of the acid gas of described regenerator tower top and described rich solution flash tank also with a H
2s tourie is connected.
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|---|---|---|---|
| CN201310551598.9A CN103537174B (en) | 2013-11-07 | 2013-11-07 | The gas purge system that a kind of unstripped gas can be recycled |
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| CN201310551598.9A CN103537174B (en) | 2013-11-07 | 2013-11-07 | The gas purge system that a kind of unstripped gas can be recycled |
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| CN103537174A true CN103537174A (en) | 2014-01-29 |
| CN103537174B CN103537174B (en) | 2016-07-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110420543A (en) * | 2019-08-20 | 2019-11-08 | 华中科技大学 | One kind is for reacting phase transformation trapping CO2Device |
| CN112645330A (en) * | 2020-12-17 | 2021-04-13 | 浙江省天正设计工程有限公司 | Device and process for recovering carbonyl sulfide in chlorination process tail gas |
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| CN101830462A (en) * | 2010-06-03 | 2010-09-15 | 清华大学 | CO2 trapping method combining dimethyl carbonate absorption and membrane desorption |
| US20120160101A1 (en) * | 2008-12-17 | 2012-06-28 | Johannes Menzel | Method for purifying gases and obtaining acid gases |
| CN103285712A (en) * | 2012-03-02 | 2013-09-11 | 克莱斯克(北京)环境工程有限公司 | Method for circularly absorbing SO2 in RFCC (Residue Fluid Catalytic Cracking) regenerative flue gas by utilizing ionic liquid |
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Patent Citations (5)
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| CN1546207A (en) * | 2003-12-09 | 2004-11-17 | 南化集团研究院 | Method for separating carbon dioxide dissolvent from gas mixture |
| CN101054167A (en) * | 2007-05-30 | 2007-10-17 | 兖矿鲁南化肥厂 | Technique for extracting high-purity hydrogen sulfide |
| US20120160101A1 (en) * | 2008-12-17 | 2012-06-28 | Johannes Menzel | Method for purifying gases and obtaining acid gases |
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| CN103285712A (en) * | 2012-03-02 | 2013-09-11 | 克莱斯克(北京)环境工程有限公司 | Method for circularly absorbing SO2 in RFCC (Residue Fluid Catalytic Cracking) regenerative flue gas by utilizing ionic liquid |
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| CN110420543A (en) * | 2019-08-20 | 2019-11-08 | 华中科技大学 | One kind is for reacting phase transformation trapping CO2Device |
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| CN112645330A (en) * | 2020-12-17 | 2021-04-13 | 浙江省天正设计工程有限公司 | Device and process for recovering carbonyl sulfide in chlorination process tail gas |
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|---|---|
| CN103537174B (en) | 2016-07-13 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC Gas & Power Group Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CNOOC Gas & Power Group Patentee before: China National Offshore Oil Corporation |