CN103496701B - Coke-stove gas is produced device and the preparation method of carbon monoxide - Google Patents
Coke-stove gas is produced device and the preparation method of carbon monoxide Download PDFInfo
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- CN103496701B CN103496701B CN201310427309.4A CN201310427309A CN103496701B CN 103496701 B CN103496701 B CN 103496701B CN 201310427309 A CN201310427309 A CN 201310427309A CN 103496701 B CN103496701 B CN 103496701B
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Abstract
<b>The present invention relates to a kind of coke-stove gas and produce device and the preparation method of carbon monoxide. Coke-stove gas claims again coke-oven gas, and its main component is content</b><b>55%</b><b>The hydrogen, content of left and right are approximately</b><b>25%</b><b>The methane of left and right</b><b>(CH4)</b><b>, carbon monoxide</b><b>(CO)</b><b>, carbon dioxide</b><b>(CO2)</b><b>And nitrogen (</b><b>N2</b><b>) content approximately</b><b>20%</b><b>. Due to China's methyl alcohol production capacity surplus, produce with coke-stove gas at present</b><b>LNG</b><b>The method of coproduction ethylene glycol and synthetic ammonia gradually becomes main flow. Conventional method is that in ice chest, unstripped gas is produced</b><b>LNG</b><b>After, hydrogen rich gas is made into according to a certain percentage synthesis gas as synthetic ammonia feedstock with nitrogen outside ice chest. The present invention's composition comprises</b><b>: PSA</b><b>Dehydrogenation unit (</b><b>1</b><b>), described</b><b>PSA</b><b>Dehydrogenation unit (</b><b>1</b><b>) and molecular sieve decarbonization device (</b><b>5</b><b>), described molecular sieve decarbonization device (</b><b>5</b><b>) and ice chest (</b><b>3</b><b>) be connected, described ice chest (</b><b>3</b><b>) outside is provided with nitrogen circulation compressor. The present invention produces carbon monoxide for oven gas.</b>
Description
Technical field:
The present invention relates to a kind of coke-stove gas and produce device and the preparation method of carbon monoxide.
Background technology:
Coke-stove gas claims again coke-oven gas, and its main component is the hydrogen of content 55% left and right, the first of content approximately 25% left and rightThe content approximately 20% of alkane (CH4), carbon monoxide (CO), carbon dioxide (CO2) and nitrogen (N2). Because oven gas is rich in hydrogen, firstAlkane and carbon monoxide, oven gas comprehensive utilization has two kinds of methods, the first: can improve calorific value by methanation reaction, make absolutelyMost of carbon monoxide, carbon dioxide conversion become methane, can obtain synthetic natural gas more than methane volume fraction 40-50%,Obtain liquefied natural gas (LNG) through liquefaction again, more unnecessary hydrogen is equipped with to nitrogen production synthetic ammonia; It two is: by coke-stove gasAfter middle methane extracts, coproduction CO gas, then by hydrogen and carbon monoxide synthesizing methanol, or utilize carbon monoxide production secondGlycol. Due to China's methyl alcohol production capacity surplus, at present gradually become main by the method that coke-stove gas is produced LNG coproduction ethylene glycol and synthetic ammoniaStream. Conventional method is that in ice chest, unstripped gas is produced after LNG, and hydrogen rich gas is made into according to a certain percentage synthesis gas with nitrogen outside ice chestAs synthetic ammonia feedstock. The existing method of extracting carbon monoxide from oven gas is to adopt pressure-swing absorption apparatus to extract an oxidationCarbon, obviously, system yield is low in this scheme outlet pressure fluctuation, and the poor utilization of capacity that causes of device operation stability is low, and operating cost is high.
Summary of the invention:
The object of the present invention is to provide a kind of coke-stove gas to produce device and the preparation method of carbon monoxide.
The object of the present invention is achieved like this:
Coke-stove gas is produced a device for carbon monoxide, and its composition comprises: PSA dehydrogenation unit, described PSA dehydrogenation dressPut and molecular sieve decarbonization device, described molecular sieve decarbonization device is connected with ice chest, and described ice chest outside is provided with nitrogen and followsRing compressor.
Described coke-stove gas is produced the device of carbon monoxide, and described molecule ice chest inside is provided with main heat exchanger, de-Hydrogen rectifying column, dehydrogenation overhead condenser, domethanizing column phegma knockout drum, subcooler A, subcooler B, denitrogenation rectifying column, denitrogenationTower phegma knockout drum, denitrogenation rectifying column, demethanation rectifying column, demethanation phegma knockout drum, demethanation tower top condenser, instituteThe ice chest outside of stating is provided with supercharger, 1 grade of cyclic nitrogen press, 2 grades of cyclic nitrogen press, decompressor.
Described coke-stove gas is produced the device of carbon monoxide, described PSA dehydrogenation unit and molecular sieve decarbonization device itBetween connect by unstripped gas supercharger.
Described coke-stove gas is produced the preparation method that the device of carbon monoxide carries out, and its manufacturing process is: described PSADevice for producing hydrogen is accepted unstripped gas, and the major part of institute's hydrogen is proposed, and the hydrogen of proposition is drawn out-of-bounds; Through PSA dehydrogenation unitResolution gas enter molecular sieve decarbonization device after by feed gas compressor supercharging, enter afterwards ice chest.
Described coke-stove gas is produced the preparation method that the device of carbon monoxide carries out, and described resolution gas is pressed through superchargerAfter contracting, enter decarbonization device, it is sour gas that described unstripped gas contains a small amount of carbon dioxide, after PSA device for producing hydrogen, separatesIn gassing, carbon dioxide can be further concentrated, and first described unstripped gas passes through decarbonization device by contained carbon dioxide eliminating,Decarbonization device adopts the de-carbon removing device of molecular sieve adsorption; Purified gas enters ice chest and first after heat exchanger cooling, sends into dehydrogenation essenceHeat up in a steamer tower and carry out rectifying, the hydrogen rich gas of extracting out from dehydrogenation rectifier is sent into decompressor swell refrigeration after heat exchanger re-heat, willEnergy reclaims and provides after cold with from the rich nitrogen of denitrogenation rectifying column top extraction converges, after heat exchanger re-heat for deviceSend into the supercharging of decompressor supercharger, as the regeneration gas of molecular sieve decarbonization device; The liquid warp of extracting out from dehydrogenation rectifying column bottomSubcooler is crossed after cold and is sent into the rectifying of denitrogenation rectifying column, extracts gas phase part out from denitrogenation rectifying column middle part, sends into demethanation rectifying columnCarry out rectifying, extract liquid phase part from demethanation rectifying column bottom out, after heat exchanger re-heat, send out-of-bounds as high methane gas; FromGas phase part is extracted at demethanation rectifying column top out, as product send after sending into the supercharging of carbon monoxide supercharger after heat exchanger re-heatOutside out-of-bounds; Nitrogen cycle device in ice chest is closed cycle, is the main provider of device cold; Nitrogen is pressed through 1 grade of cyclic nitrogenMachine supercharging rear portion directly enters ice chest, enters the reboiler of denitrogenation rectifier bottoms after heat exchanger cooling, is rectifying columnExcessively cold through subcooler B after providing heat also to lower the temperature, after throttling liquefaction, send into denitrogenation overhead condenser and dehydrogenation tower top respectivelyCondenser converging, sends into 1 after heat exchange vaporization with the boil-off gas of extracting out from demethanation tower top condenser after heat exchanger re-heatThe supercharging of level cyclic nitrogen press; Another strand of nitrogen from the supercharging of 1 grade of cyclic nitrogen press, after the supercharging of 2 grades of cyclic nitrogen pressSend into ice chest, after heat exchanger cooling, enter the reboiler of demethanation rectifier bottoms, for rectifying column provides after heat cooling,After throttling liquefaction, send into demethanation tower top condenser.
Beneficial effect:
1. the gas product yield that the present invention extracts is high, and pressure stability can meet the requirement of lower procedure stable yields.
2. the good continuous operating time of device reliability using in the present invention is long, and security is good.
3. method energy-saving and emission-reduction provided by the invention, have considerable social efficiency and business efficiency.
4. the invention provides a kind of new coke-stove gas that utilizes and produce the device of carbon monoxide.
5. the present invention carries out dehydrogenation by PSA dehydrogenation unit, carries out supercharging by unstripped gas supercharger, is undertaken by ice chestCooling, carry out carbonization treatment by molecular sieve decarbonization device, complete whole working cycles.
6. the energy consumption of producing in process of the present invention is low, and outlet pressure is stable, and system yield is high.
Brief description of the drawings:
Accompanying drawing 1 is structural representation of the present invention. In figure, 1 is PSA dehydrogenation unit, and 2 is unstripped gas supercharger, and 3 is coldCase, 4 is decompressor, 5 is molecular sieve decarbonization device.
Accompanying drawing 2 is process charts of the present invention. In figure, 6 is dehydrogenation flow process, and 7 is cooling process, and 8 is decarburization flow process.
Accompanying drawing 3 is process charts of dehydrogenation flow process in accompanying drawing 2.
Accompanying drawing 4 is process charts of decarburization flow process in accompanying drawing 2.
Accompanying drawing 5 is process charts of ice chest flow process in accompanying drawing 2.
Detailed description of the invention:
Embodiment 1:
Coke-stove gas is produced a device for carbon monoxide, and its composition comprises: PSA dehydrogenation unit 1, described PSA dehydrogenationDevice 1 and molecular sieve decarbonization device 5, described molecular sieve decarbonization device 5 is connected with ice chest 3, and described ice chest 3 outsides are provided withNitrogen circulation compressor.
Embodiment 2:
Produce the device of carbon monoxide according to the coke-stove gas described in embodiment 1, described molecule ice chest 3 inside are provided withMain heat exchanger, dehydrogenation rectifying column, dehydrogenation overhead condenser, domethanizing column phegma knockout drum, subcooler A, subcooler B, denitrogenationRectifying column, denitrification column phegma knockout drum, denitrogenation rectifying column, demethanation rectifying column, demethanation phegma knockout drum, domethanizing columnTop condenser, described ice chest outside is provided with supercharger, 1 grade of cyclic nitrogen press, 2 grades of cyclic nitrogen press, decompressor 4.
Embodiment 3:
Produce the device of carbon monoxide according to the coke-stove gas described in embodiment 1, described PSA dehydrogenation unit 1 and moleculeBetween sieve decarbonization device 5, connect by unstripped gas supercharger 2.
Embodiment 4:
The described coke-stove gas of one of embodiment 1-3 is produced the preparation method that the device of carbon monoxide carries out, its systemAs process be: described PSA device for producing hydrogen 1 is accepted unstripped gas, the major part of institute's hydrogen is proposed, the hydrogen of proposition is drawn boundaryOutward; Enter molecular sieve decarbonization device 5 through the resolution gas of PSA dehydrogenation unit 1 after by feed gas compressor 2 superchargings, enter afterwardsIce chest 3.
Embodiment 5:
Produce the preparation method that the device of carbon monoxide carries out, described solution according to the coke-stove gas described in embodiment 1 or 4Gassing enters decarbonization device after supercharger compression, and it is sour gas that described unstripped gas contains a small amount of carbon dioxide, processAfter PSA device for producing hydrogen, in resolution gas, carbon dioxide can be further concentrated, and first described unstripped gas passes through decarbonization device by containedCarbon dioxide eliminating, decarbonization device adopts the de-carbon removing device of molecular sieve adsorption; Purified gas enters ice chest first through heat exchangerAfter cooling, send into dehydrogenation rectifying column and carry out rectifying, the hydrogen rich gas of extracting out from dehydrogenation rectifier is sent into swollen after heat exchanger re-heatSwollen machine swell refrigeration, reclaims energy and converges for device provides after cold with from the rich nitrogen of denitrogenation rectifying column top extractionAfter, after heat exchanger re-heat, send into the supercharging of decompressor supercharger, as the regeneration gas of molecular sieve decarbonization device; From dehydrogenation rectifying columnThe liquid that extract out bottom is crossed after cold and is sent into the rectifying of denitrogenation rectifying column through subcooler, extracts gas phase part out from denitrogenation rectifying column middle part,Send into demethanation rectifying column and carry out rectifying, extract liquid phase part from demethanation rectifying column bottom out, after heat exchanger re-heat, conduct is richMethane gas is sent out-of-bounds; Extract gas phase part from demethanation rectifying column top out, after heat exchanger re-heat, send into carbon monoxide superchargingAfter machine supercharging, send out-of-bounds as product; Nitrogen cycle device in ice chest is closed cycle, is the main provider of device cold;Nitrogen directly enters ice chest through 1 grade of cyclic nitrogen press supercharging rear portion, after heat exchanger cooling, enters denitrogenation rectifier bottomsReboiler, for rectifying column provides excessively cold through subcooler B after heat cooling, after throttling liquefaction, send into denitrogenation tower top respectivelyCondenser and dehydrogenation overhead condenser, converging with the boil-off gas of extracting out from demethanation tower top condenser after heat exchange vaporization, warpAfter heat exchanger re-heat, send into the supercharging of 1 grade of cyclic nitrogen press; Another strand of nitrogen from the supercharging of 1 grade of cyclic nitrogen press, through 2 gradesAfter the supercharging of cyclic nitrogen press, sending into ice chest, enter the reboiler of demethanation rectifier bottoms after heat exchanger cooling, is rectifying columnProvide after heat cooling, after throttling liquefaction, send into demethanation tower top condenser.
Embodiment 6:
Produce according to the described coke-stove gas described in above-described embodiment the preparation method that the device of carbon monoxide carries out, formerMaterial gas enters PSA hydrogen generating system, and the major part of institute's hydrogen is proposed, and the hydrogen of proposition is drawn out-of-bounds. Through PSA dehydrogenation systemResolution gas enter molecular sieve decarbonization system after by feed gas compressor supercharging, enter afterwards ice chest. Adopt PSA system to raw materialGas carries out thick out-of-phase can effectively reduce system energy consumption for whole employing low-temperature deep methods. Resolution gas enters after supercharger compressionDecarbonization system.
It is sour gas that unstripped gas contains a small amount of CO2, and after PSA hydrogen generating system, in resolution gas, carbon dioxide can enter oneStep is concentrated, and its existence can cause metal erosion contaminated environment. In addition, CO2 can become solid in cryogenic system, causes to beSystem stops up, so must remove. First this programme Raw gas remove contained CO2 through decarbonization system, the decarburization of this deviceSystem adopts molecular sieve adsorption to remove CO2 system.
Purified gas enters ice chest and first after heat exchanger cooling, sends into dehydrogenation rectifying column and carry out rectifying, from dehydrogenation rectifying columnThe hydrogen rich gas that portion extracts out is sent into decompressor swell refrigeration after heat exchanger re-heat, energy is reclaimed and for system provide after cold withThe rich nitrogen of extracting out from denitrogenation rectifying column top converges, after heat exchanger re-heat, send into the supercharging of decompressor supercharger, as dividingThe regeneration gas of son sieve decarbonization system. The liquid of extracting out from dehydrogenation rectifying column bottom is crossed after cold and is sent into denitrogenation rectifying column essence through subcoolerHeat up in a steamer, extract gas phase part out from denitrogenation rectifying column middle part, send into demethanation rectifying column and carry out rectifying, take out from demethanation rectifying column bottomGo out liquid phase part, after heat exchanger re-heat, send out-of-bounds as high methane gas. Extract gas phase part out from demethanation rectifying column top,Send into the supercharging of CO supercharger after heat exchanger re-heat after, send out-of-bounds as product. Nitrogen cycle system in ice chest is that enclosed is followedRing is the main provider of system cold. Nitrogen directly enters ice chest through 1 grade of cyclic nitrogen press supercharging rear portion, through heat exchangeAfter device cooling, enter the reboiler of denitrogenation rectifier bottoms, for rectifying column provides excessively cold through subcooler II after heat cooling,After throttling liquefaction, send into denitrogenation overhead condenser and dehydrogenation overhead condenser respectively, after heat exchange vaporization and from demethanation tower topAfter the boil-off gas that condenser is extracted out converges, after heat exchanger re-heat, send into the supercharging of 1 grade of cyclic nitrogen press. From 1 grade of cyclic nitrogen pressAnother after supercharging strand nitrogen is being sent into ice chest after the supercharging of 2 grades of cyclic nitrogen press, after heat exchanger cooling, enters demethanationThe reboiler of rectifier bottoms for rectifying column provides after heat cooling, is sent into demethanation tower top condenser after throttling liquefaction.
Claims (3)
1. coke-stove gas is produced a device for carbon monoxide, and its composition comprises: PSA dehydrogenation unit, is characterized in that: describedPSA dehydrogenation unit is connected with molecular sieve decarbonization device, and described molecular sieve decarbonization device is connected with ice chest, outside described ice chestPortion is provided with nitrogen circulation compressor, passes through unstripped gas supercharger between described PSA dehydrogenation unit and molecular sieve decarbonization deviceConnect.
2. coke-stove gas claimed in claim 1 is produced the preparation method that the device of carbon monoxide carries out, and it is characterized in that: instituteThe PSA dehydrogenation unit of stating is accepted unstripped gas, and the major part of institute's hydrogen is proposed, and the hydrogen of proposition is drawn out-of-bounds; Through PSAThe resolution gas of dehydrogenation unit enters molecular sieve decarbonization device after by feed gas compressor supercharging, enters afterwards ice chest.
3. coke-stove gas according to claim 2 is produced the preparation method that the device of carbon monoxide carries out, and it is characterized in that:Described resolution gas enters decarbonization device after supercharger compression, and it is sour gas that described unstripped gas contains a small amount of carbon dioxideBody, after PSA dehydrogenation unit, in resolution gas, carbon dioxide can be further concentrated, and described unstripped gas is first through decarburization dressPut contained carbon dioxide eliminating, decarbonization device adopts the de-carbon removing device of molecular sieve adsorption; First purified gas enters ice chestAfter heat exchanger cooling, send into dehydrogenation rectifying column and carry out rectifying, the hydrogen rich gas of extracting out from dehydrogenation rectifier is through heat exchanger re-heatAfter send into decompressor swell refrigeration, energy is reclaimed and provides after cold and rich nitrogen from the extraction of denitrogenation rectifying column top for deviceAfter gas converges, after heat exchanger re-heat, send into the supercharging of decompressor supercharger, as the regeneration gas of molecular sieve decarbonization device; From dehydrogenationThe liquid that extract out rectifying column bottom is crossed after cold and is sent into the rectifying of denitrogenation rectifying column through subcooler, extracts gas phase out from denitrogenation rectifying column middle partPart, sends into demethanation rectifying column and carries out rectifying, extracts liquid phase part from demethanation rectifying column bottom out, after heat exchanger re-heat, doesFor high methane gas is sent out-of-bounds; Extract gas phase part from demethanation rectifying column top out, after heat exchanger re-heat, send into carbon monoxideAfter supercharger supercharging, send out-of-bounds as product; Nitrogen cycle device in ice chest is closed cycle, is mainly carrying of device coldDonor; Nitrogen directly enters ice chest through 1 grade of cyclic nitrogen press supercharging rear portion, after heat exchanger cooling, enters denitrogenation rectifyingThe reboiler of tower bottom for rectifying column provides excessively cold through subcooler B after heat cooling, is sent into respectively after throttling liquefactionDenitrogenation overhead condenser and dehydrogenation overhead condenser converge with the boil-off gas of extracting out from demethanation tower top condenser after heat exchange vaporizationAfter closing, after heat exchanger re-heat, send into the supercharging of 1 grade of cyclic nitrogen press; Another strand of nitrogen from the supercharging of 1 grade of cyclic nitrogen press,After the supercharging of 2 grades of cyclic nitrogen press, send into ice chest, after heat exchanger cooling, entering boiling again of demethanation rectifier bottomsDevice for rectifying column provides after heat cooling, is sent into demethanation tower top condenser after throttling liquefaction.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103983086B (en) * | 2014-05-19 | 2016-03-30 | 杭州杭氧股份有限公司 | A kind of method being applicable to synthesis gas piece-rate system in ammonia from coal device and cryogenic separation LNG |
| CN104528647B (en) * | 2015-01-12 | 2017-05-31 | 上海启元空分技术发展股份有限公司 | The method and apparatus that a kind of synthesis gas separates hydrogen making and high-purity CO |
| CN106853969A (en) * | 2015-12-09 | 2017-06-16 | 上海华林工业气体有限公司 | A kind of method of CO product purities in raising HyCO factories |
| CN106276795A (en) * | 2016-08-03 | 2017-01-04 | 西南化工研究设计院有限公司 | A kind of group technology utilizing coke-stove gas extraction metallurgy reducing gases |
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| CN101343580A (en) * | 2008-08-22 | 2009-01-14 | 四川天一科技股份有限公司 | Method for preparing methanol synthesis gas with oven gas and blast furnace gas |
| CN102374754A (en) * | 2011-09-24 | 2012-03-14 | 辽宁哈深冷气体液化设备有限公司 | Equipment and method for preparing liquid natural gas and carbon oxide from coke oven gas |
| CN102838116A (en) * | 2012-09-10 | 2012-12-26 | 太原理工大学 | Method for preparing carbon monoxide from coke oven gas and carbon dioxide |
| CN203513285U (en) * | 2013-09-18 | 2014-04-02 | 辽宁哈深冷气体液化设备有限公司 | Device for producing carbon monoxide by coke oven gas |
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Patent Citations (4)
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| CN101343580A (en) * | 2008-08-22 | 2009-01-14 | 四川天一科技股份有限公司 | Method for preparing methanol synthesis gas with oven gas and blast furnace gas |
| CN102374754A (en) * | 2011-09-24 | 2012-03-14 | 辽宁哈深冷气体液化设备有限公司 | Equipment and method for preparing liquid natural gas and carbon oxide from coke oven gas |
| CN102838116A (en) * | 2012-09-10 | 2012-12-26 | 太原理工大学 | Method for preparing carbon monoxide from coke oven gas and carbon dioxide |
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Address after: 112300 Liaoning city of Tieling province Kaiyuan city Kaiyuan Economic Development Zone No. 1 North Street, a scientific research Patentee after: LIAONING CIMC HASHENLENG GAS LIQUEFACTION EQUIPMENT CO., LTD. Address before: 112300 North Zone, Kaiyuan Industrial Park, Liaoning, Tieling Patentee before: Liaoning Harbin Shenleng Gas Liquefaction Equipment Co., Ltd. |