CN102040195B - Technology for recycling cold quantity in stripping gas by NHD (Polyethylene Glycol Dimethyl Ether) synthesis gas decarbonisation and equipment thereof - Google Patents
Technology for recycling cold quantity in stripping gas by NHD (Polyethylene Glycol Dimethyl Ether) synthesis gas decarbonisation and equipment thereof Download PDFInfo
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- CN102040195B CN102040195B CN201010549344XA CN201010549344A CN102040195B CN 102040195 B CN102040195 B CN 102040195B CN 201010549344X A CN201010549344X A CN 201010549344XA CN 201010549344 A CN201010549344 A CN 201010549344A CN 102040195 B CN102040195 B CN 102040195B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a technology for recycling cold quantity in stripping gas by a NHD (Polyethylene Glycol Dimethyl Ether) decarbonisation technology and equipment thereof. A fan is adopted to introduce low-temperature stripping nitrogen into a heat exchanger from the top of a stripping column; the low-temperature stripping nitrogen exchanges heat with refined gas subjected to water cooling in a methanation water cooler, and then is emptied; and the temperature of the refined gas is further lowered, and then the refined gas is delivered into a synthesis gas compressor. After nitrogen separated by the gas separator exchanges heat with the refined gas by a heat exchanger, on one hand the NHD solution drops carried in nitrogen entrainment can be separated to lower the NHD solution loss, and on the other hand, after the refined gas the temperature of which is further lowered enters the compressor, the power consumption of the compressor is also greatly lowered, and the purposes of energy saving, environment protection and synergy can be realized.
Description
Technical field
The present invention relates to a kind of cold recovery and utilize technology, the cold recovery that is specifically related in a kind of NHD method decarburization technique gas stripping gas is utilized technology and equipment thereof.
Background technology
In using NHD (polyethylene glycol ether Yue) desulfurization, decarbonization, methanation reaction technique ammonia plant, NHD synthesis gas decarbonization process uses low-temperature absorption, flash desorption, nitrogen gas stripping processes, since nitrogen gas stripping Gas tower from the bottom to the rich liquid NHD vented after stripping, the nitrogen stripper comes down from the high-pressure nitrogen, together with the overall operation of decarbonization technology in low-temperature environment, the low temperature nitrogen gas stripping, gas larger and the presence of NHD solution gas gas entrainment phenomenon, this phenomenon is caused by the loss of the NHD and low temperature nitrogen gas stripping is not a reasonable use, NHD synthesis gas decarbonization process after purification by methanation process gas temperature than high, subject methanation water cooler cooling down, but the effect of heat transfer methanation water coolers are directly affected by the ambient temperature constraints, the ambient temperature is high, the synthesis gas compressor power consumption is large, of course, can also take the ammonia cooler cooling to reduce the power consumption of the compressor, but the high cost of cooling capacity available, and the ice machine system nor wealthy cold available.
Summary of the invention
To the problem that exists in the above-mentioned prior art; The object of the present invention is to provide the cold recovery in a kind of NHD method synthetic gas decarburization gas stripping gas to utilize technology; Cold recovery utilization through NHD method synthetic gas decarburization gas stripping gas; Processed gas temperature behind the reduction methanation process, thereby the power consumption of minimizing synthesic gas compressor.
The technical scheme that the present invention is taked for its purpose of realization: the cold recovery in a kind of NHD method synthetic gas decarburization gas stripping gas is utilized technology, and this technology comprises the steps:
A), carry nitrogen from gas stripping column top airbleed and get into the gas separator, separate gas and carry the NHD drop in the nitrogen mist;
B), the industrial gasses after the decarburization are handled with methanation furnace, the air intake that goes out of methanation furnace is inserted the methanation interchanger, with the gas after handling with handle before gas carry out heat exchange;
C), will in the access of the gas after the heat exchange of methane interchanger methanation water cooler, lower the temperature;
D), low temperature nitrogen that will be after gas separator separates through behind the interchanger with through methanation water cooler cooling processed gas heat exchange later; Extract emptying out with the nitrogen of nitrogen blower fan after with heat exchange, the processed gas of further being lowered the temperature after the heat exchange directly inserts synthesic gas compressor import separator.
Another object of the present invention is to provide the cold recovery of implementing in the NHD method synthetic gas decarburization gas stripping gas to utilize the equipment of technology.
The apparatus comprises including stripper, methanation furnace, methanation heat exchanger, synthesis gas compressor and Yue alkylation water cooler, and out of the methanation furnace gas port access methanation heat exchanger for the methanation heat through line and Yue alkylation water cooler connected to said stripper and syngas compressor cascade through the line between the gas separator and heat exchanger, said Yue alkylation water via pipelines and heat exchangers connected, said heat exchanger connected to the fan.Said interchanger is a plate-type heat exchanger.
Beneficial effect of the present invention: after the nitrogen that gas separator is separated passes through interchanger and fine gas heat exchange; Can separate the NHD solution droplets of carrying secretly in the nitrogen mist on the one hand; Reduce the NHD solution losses; After the fine gas that further reduces temperature gets into compressor, consumption of compressor is also greatly reduced on the other hand, realized energy-conserving and environment-protective synergic purpose.
Description of drawings
Below in conjunction with accompanying drawing and embodiment to further explain of the present invention.
Fig. 1 processing unit schema of the present invention.
Among the figure 1, gas stripping column, 2, the methanation water cooler, 3, gas separator, 4, interchanger, 5, blower fan, 6, synthesic gas compressor, 7, methanation furnace, 8, the methanation interchanger.
Embodiment
Shown in Figure 1, the present invention include stripper 1, synthesis gas compressor 6 and Yue alkylation water cooler 2, in the stripping column 1 and the synthesis gas compressor 6 is connected in series between the gas separator through line 3 and heat exchangers 4, Yue alkylation water cooler 2 through line 4 is connected with the heat exchanger, the heat exchanger 4 Connect the fan 5.Interchanger 4 can adopt plate-type heat exchanger.Methanation furnace 7 is connected with methanation interchanger 8 through the entry and exit pipeline, and methanation interchanger 8 links to each other with methanation water cooler 2 through pipeline.
Cold recovery in the NHD method synthetic gas decarburization gas stripping gas of the present invention is utilized technology; To hang down wet with blower fan carries nitrogen and introduces interchanger from stripper overhead; Low wet is proposed nitrogen and emptying after the fine gas heat exchange after the water-cooled from the methanation water cooler, sends into the synthetic gas compression set again after the fine gas temperature is further reduced.Concrete steps are following:
A), carry nitrogen from gas stripping column 1 top airbleed and get into the gas separator 3, separate gas and carry the NHD drop in the nitrogen mist;
B), the industrial gasses after the decarburization are handled with methanation furnace 7, with methanation furnace 7 go out air intake insert after methanation interchanger 8 will be handled gas with handle preceding gas and carry out heat exchange;
C), will in the access of the gas after 8 heat exchange of methane interchanger methanation water cooler 2, lower the temperature;
D), low temperature nitrogen that will be after gas separator separates through behind the interchanger with through methanation water cooler cooling processed gas heat exchange later; Extract emptying out with the nitrogen of nitrogen blower fan after with heat exchange, the processed gas of further being lowered the temperature after the heat exchange directly inserts the compressor inlet separator.
The present invention adopts blower fan will hang down wet and carries nitrogen and introduce interchanger from stripper overhead; Low wet is proposed nitrogen and emptying after the fine gas heat exchange after the water-cooled from the methanation water cooler; Send into the synthetic gas compression set after the fine gas temperature is further reduced again, thereby realize the purpose of the power consumption of minimizing synthesic gas compressor.
Claims (3)
1. the cold recovery carried in the nitrogen of a NHD method synthetic gas decarbonization gas is utilized technology, it is characterized in that this technology comprises the steps:
A), carry nitrogen from gas stripping column top airbleed and get into the gas separator, separate gas and carry the NHD drop in the nitrogen mist;
B), the industrial gasses after the decarburization are handled with methanation furnace, the air intake that goes out of methanation furnace is inserted the methanation interchanger, with the gas after handling with handle before gas carry out heat exchange;
C), will in the access of the gas after the heat exchange of methane interchanger methanation water cooler, lower the temperature;
D), low temperature nitrogen that will be after gas separator separates through behind the interchanger with through methanation water cooler cooling processed gas heat exchange later; Extract emptying out with the nitrogen of nitrogen blower fan after with heat exchange, the processed gas of further being lowered the temperature after the heat exchange directly inserts synthesic gas compressor import separator.
2. implement the described NHD method of claim 1 synthetic gas decarbonization gas and carry the equipment that cold recovery in the nitrogen is utilized technology; Comprise gas stripping column (1), methanation furnace (7), methanation interchanger (8), synthesic gas compressor (6) and methanation water cooler (2); The air intake that goes out of said methanation furnace (7) inserts methanation interchanger (8); Said methanation interchanger (8) is connected with methanation water cooler (2) through pipeline; It is characterized in that: between said gas stripping column (1) and synthesic gas compressor (6), be connected in series gas separator (3) and interchanger (4) through pipeline; Said methanation water cooler (2) is connected with interchanger (4) through pipeline, and said interchanger (4) connects blower fan (5).
3. NHD method synthetic gas decarbonization gas according to claim 2 is carried the equipment that cold recovery in the nitrogen is utilized technology, and it is characterized in that: said interchanger (4) is a plate-type heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010549344XA CN102040195B (en) | 2010-11-18 | 2010-11-18 | Technology for recycling cold quantity in stripping gas by NHD (Polyethylene Glycol Dimethyl Ether) synthesis gas decarbonisation and equipment thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010549344XA CN102040195B (en) | 2010-11-18 | 2010-11-18 | Technology for recycling cold quantity in stripping gas by NHD (Polyethylene Glycol Dimethyl Ether) synthesis gas decarbonisation and equipment thereof |
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| CN102040195A CN102040195A (en) | 2011-05-04 |
| CN102040195B true CN102040195B (en) | 2012-10-31 |
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| CN102703109A (en) * | 2012-05-30 | 2012-10-03 | 中国石油集团工程设计有限责任公司北京分公司 | Method for removing sulfur from crude oil by gas stripping method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621763A (en) * | 2003-11-26 | 2005-06-01 | 吉林长山化肥集团长达有限公司机械厂 | Application of ammonia absorption refrigeration in polyethylene glycol dimethyl ether decarburization process |
| CN201168539Y (en) * | 2008-03-31 | 2008-12-24 | 郑州大学 | Carbon dioxide gas separating and gathering apparatus |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621763A (en) * | 2003-11-26 | 2005-06-01 | 吉林长山化肥集团长达有限公司机械厂 | Application of ammonia absorption refrigeration in polyethylene glycol dimethyl ether decarburization process |
| CN201168539Y (en) * | 2008-03-31 | 2008-12-24 | 郑州大学 | Carbon dioxide gas separating and gathering apparatus |
Non-Patent Citations (3)
| Title |
|---|
| 何杰等.NHD脱碳系统节能改进.《化肥工业》.2003,第30卷(第6期),第51-52,62页. * |
| 刘国胜.NHD脱碳工艺节能改进.《山西化工》.2005,第25卷(第2期),第68-69,87页. * |
| 姜淮等.NHD脱硫脱碳工艺在合成氨装置的应用.《化肥设计》.2008,第46卷(第6期),第30-32,47页. * |
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