CN1376767A - Oxygen-enriched gas generated continuously by coal - Google Patents

Oxygen-enriched gas generated continuously by coal Download PDF

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Publication number
CN1376767A
CN1376767A CN 01107290 CN01107290A CN1376767A CN 1376767 A CN1376767 A CN 1376767A CN 01107290 CN01107290 CN 01107290 CN 01107290 A CN01107290 A CN 01107290A CN 1376767 A CN1376767 A CN 1376767A
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CN
China
Prior art keywords
gas
oxygen
stove
coal
steam
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 01107290
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Chinese (zh)
Inventor
李开健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XIHUA CHEMICAL ENGINEERING INST CHENGDU
Original Assignee
XIHUA CHEMICAL ENGINEERING INST CHENGDU
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Publication date
Application filed by XIHUA CHEMICAL ENGINEERING INST CHENGDU filed Critical XIHUA CHEMICAL ENGINEERING INST CHENGDU
Priority to CN 01107290 priority Critical patent/CN1376767A/en
Publication of CN1376767A publication Critical patent/CN1376767A/en
Pending legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/16Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y02E20/18Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]

Abstract

A process for gasifying coal features that the oxygen-enriched gasifying agent is fed into gasifier alternatively from its upper and lower parts. Its advantages are low consumption of oxygen and coal (decreased by 25% and 10% respectively), low residual carbon (decreased by 50%), and low content of CO2, methane and tar oil in gas.

Description

Oxygen-enriched gas generated continuously by coal
The invention belongs to the gasification field, specially refer to the coal generating gas processing method that adopts oxygen enrichment fixed bed or moving-bed.
No matter existing oxygen enrichment fixed bed or moving-bed coal generating gas are normal pressure or pressing technology, usually adopt with oxygen, vapor mixing proportional after, add in the stove from the Gas-making Furnace bottom.Oxygen-rich mixture is realized coal gasification in the flow state from bottom to top all the time in carbon-coating.Oxygen in the gas mixture at first with stove in carbon reaction in the carbon-coating, emit a large amount of heats when generating carbonic acid gas, add the water vapor in hot bed of carbon and the gas mixture, for the reaction of steam in the gas mixture and red-hot carbon-coating provides heat.Coal for gasification adds from stove top in the stove.Carbon-coating is gasified in slowly descending under the rotation of the fire grate of furnace bottom.Slag is discharged from furnace bottom.Vaporized chemical forms relative countercurrent movement with carbon-coating.Coal gas that generates and unreacted steam go upward to the air outlet that is located at upper of furnace body and leave Gas-making Furnace.
Because the vaporized chemical of gasification and the coal gas of generation are in flow state from bottom to top all the time.Gas constantly moves to heat in the carbon-coating of top by carbon-coating, temperature was low when its result went into stove owing to vaporized chemical, cause carbon residue content height in the slag, temperature is up to 650~750 ℃ when causing wet gas to leave Gas-making Furnace, take a large amount of heat of high temperature out of, its result unit of making coal gas consumption of coal and oxygen-consumption obviously increase, and cost increases.
Purpose of the present invention can overcome above-mentioned shortcoming for society provides a kind of, adopts the oxygen enrichment coal generating gas novel process of fixed bed or moving-bed.
The present invention adopts oxygen-rich gasifying agent, takes turns from Gas-making Furnace top respectively or the bottom adding, makes oxygen-rich gasifying agent in stove, to rotate up-downgoing flow pattern system gas.In order to guarantee safety, the preceding of up-downgoing system gas shift and after certain hour in, go into stove with pure steam, preventing the oxygen in the vaporized chemical, and accumulate in stove top or bottom (furnace bottom) spatial coal gas and mix formation and explode; To prevent to leave the coal gas of gasification layer, in the space of stove top or bottom (furnace bottom), run into oxygen and explosion hazard occurs simultaneously.Promptly each time no matter vaporized chemical all are the slow fed to boiler of oxygen when beginning to make gas from last or from being lowered to stove, all be that oxygen stops in advance into stove when stopping to make gas.Each system gas start-stop stage steam is gone into the time length of stove separately, and is relevant with factors such as space, stove top and the bottom, pressure, temperature, steam flows.
Adopt the present invention to carry out oxygen-enriched gas generated continuously by coal, owing to reduced the wet gas temperature of coming out of the stove significantly, the sensible heat that wet gas is taken out of reduces significantly, thereby the oxygen depletion of the unit's of making coal gas, feed coal consumption obviously reduce.Since descending system gas to moving down heat effect, the position of gasification layer is moved down relatively, and make the temperature of interior carbon-coating bottom of stove and ash bed be controlled at higher relatively temperature, make the carbon in the granular ash slag blanket of gasification layer bottom obtain the more gasification of the degree of depth, thereby reduced the carbon residue in the lime-ash effectively.
Adopt the present invention to make the synthetic ammonia semi-water gas, the fixed bed oxygen-enriched continuous gas-made technology of comparable existing single up system gas, unit coal gas reduces oxygen enrichment and consumes 25%, reduces coal consumption 10%, and the carbon residue in the slag reduces by 50%.Adopt the present invention to make methyl alcohol with synthetic gas such as water-gas, city domestic gases, the fixed bed oxygen-enriched continuous gas-made technology of comparable existing single up system gas reduces oxygen enrichment and consumes 20%, reduces coal consumption 10%.Carbon residue in the slag reduces by 50%.Adopt the present invention's gas maked coal that pressurizes, the continuous coal generating gas technology of also comparable existing fixed bed oxygen-enriched pressurization, reduce oxygen enrichment consumption 20%, coal consumption 10%, carbon residue 50%, than existing be the atmosphere intermission coal generating gas technology of oxygenant with the air, make various could synthetic under elevated pressures the unstripped gas of product, the ton product can reduce coal consumption 10%, reduces power consumption 500kWh.

Claims (6)

1. oxygen-enriched gas generated continuously by coal is characterized in that: oxygen rich air water vapour is gone into stove from stove top or bottom respectively in turn, make vaporized chemical carry out periodic uplink and downlink system gas continuously in turn at carbon-coating.
2. method according to claim 1 is characterized in that, the oxygen level of going in the stove oxygen-rich steam during up system gas is 10%~70%; The oxygen level of going into during descending system gas in the stove oxygen-rich steam is 5%~30%.
3. according to claim 1,2 described methods, it is characterized in that it is between 2~10 minutes that the time in each cycle is directly proportional with the Gas-making Furnace volume.
4. according to claim 1,2,3 method, it is characterized in that the time scale of up gas-making process and descending gas-making process is adjustable in each cycle.
5. according to claim 1,2,3,4 described methods, it is characterized in that the starting and ending stage of each gas-making process is all gone into stove with the pure steam of oxygen-free gas, pure each time steam go into the stove time for each cycle 3%~10% between.
6. according to claim 1,2,3,4,5 described methods, it is characterized in that the vapor pressure of oxygen-enriched gas generated continuously by coal is between 0.012MPa~6Mpa.
CN 01107290 2001-03-28 2001-03-28 Oxygen-enriched gas generated continuously by coal Pending CN1376767A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 01107290 CN1376767A (en) 2001-03-28 2001-03-28 Oxygen-enriched gas generated continuously by coal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 01107290 CN1376767A (en) 2001-03-28 2001-03-28 Oxygen-enriched gas generated continuously by coal

Publications (1)

Publication Number Publication Date
CN1376767A true CN1376767A (en) 2002-10-30

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Family Applications (1)

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CN 01107290 Pending CN1376767A (en) 2001-03-28 2001-03-28 Oxygen-enriched gas generated continuously by coal

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CN (1) CN1376767A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101481629A (en) * 2008-12-09 2009-07-15 福建三钢(集团)三明化工有限责任公司 Fixed bed oxygen-enriched continuous gasification process
CN101250438B (en) * 2008-04-17 2011-06-15 中国铝业股份有限公司 Oxygen-enriched gas producing method for hybrid gas furnace
CN101392187B (en) * 2008-10-29 2012-01-11 江西昌昱实业有限公司 Bidirectional oxygen-enriched continuous gasification process for atmospheric fixed bed gas furnace

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101250438B (en) * 2008-04-17 2011-06-15 中国铝业股份有限公司 Oxygen-enriched gas producing method for hybrid gas furnace
CN101392187B (en) * 2008-10-29 2012-01-11 江西昌昱实业有限公司 Bidirectional oxygen-enriched continuous gasification process for atmospheric fixed bed gas furnace
CN101481629A (en) * 2008-12-09 2009-07-15 福建三钢(集团)三明化工有限责任公司 Fixed bed oxygen-enriched continuous gasification process

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