CN1092799A - Coal (Jiao) process for atmospheric continuous oxygen-enriched air gasification of coal (coke) - Google Patents
Coal (Jiao) process for atmospheric continuous oxygen-enriched air gasification of coal (coke) Download PDFInfo
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- CN1092799A CN1092799A CN 93110917 CN93110917A CN1092799A CN 1092799 A CN1092799 A CN 1092799A CN 93110917 CN93110917 CN 93110917 CN 93110917 A CN93110917 A CN 93110917A CN 1092799 A CN1092799 A CN 1092799A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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Abstract
The present invention is to be raw material with hard coal, coke, utilizes former U.G.I type intermittent type fixed level gas cooker through improving, and adopts continous way oxygen-enriched air gasification of coal (coke) technology; Provide oxygen with non-Deep Cooling Method air separation facility, the semi-water gas of being produced uses for synthetic ammonia.The present invention have improve throughput, energy-conservation, consumption reduction, realize centralized Control, cost is low, utilize characteristics such as original equipment investment for trnasforming urban land is few, is specially adapted to the energy saving technical reconstruction of China middle-size and small-size nitrogenous fertilizer factory, increase economic efficiency.
Description
The present invention utilizes coal (hard coal), Jiao to be raw material, adopts cheap oxygen-rich air, produces semi-water gas (water-gas) in a continuous manner.
China's small and medium chemical fertilizer Ammonia Production is continued to use fixedly intermittent type gasifying process of normal pressure for a long time always.Nineteen ninety, output reached 4,680,000 tons, 8,900,000 tons (in N) respectively.Hard coal, coke are the main raw materials that the present small and medium ammonia synthesis plant of China is produced, and the gas making operation is the primary link of Ammonia Production, and this process all was to adopt U.S. U.G.I immovable bed intermittent type vapourizing furnace over 40 years.This type vapourizing furnace is existing thousands of more than of China (discarded already abroad), and there is following main drawback in it:
1) gasification operation adopts intermittent mode, and throughput is low, consumes high.
2) flow velocity of vaporized chemical by vapourizing furnace is higher, and the upper and lower system gas that hockets that blows is arranged again, therefore, and to raw material granularity (the coke 25-75m/m that has relatively high expectations; Hard coal 50～100m/m).
3) long flow path, the device structure complexity, each furnace system all has hydraulic control valve Controlling System separately, can not realize centralized Control.
Current synthetic ammonia (gasification) production has not both at home and abroad had the anthracitic immovable bed gasification technology of the pressurization of employing (normal pressure) continuous gasification, have only pressurization continuous gasification bituminous coal to make the immovable bed gasification technology of synthesis gas, as strange (Lurge) stove in German Shandong, Britain's slag (Slagging) stove etc., but all there is to bituminous coal specification of quality height the gas purification technical sophistication in these gasification technologies, investment and production cost height, environment is polluted etc., be not suitable for China's national situation, and be difficult to widespread use.It is higher to the purpose of this invention is to provide a kind of thermo-efficiency, energy-saving and cost-reducing, improves throughput, is easy to realize centralized Control, and production cost is low, utilizes original equipment to transform a little, less investment, can improve the continous way gasifying process of crude fuel utilization ratio again.
The present invention realizes as follows:
The present invention utilizes charging machine that raw material is added the top (can use the burnt pellet of 8～25m/m) of vapourizing furnace, enters drying layer, destructive distillation layer, reducing zone, zone of oxidation successively, discharges lime-ash then; The air and the steam that contain oxygen enrichment feed from the vapourizing furnace bottom continuously as vaporized chemical in proportion, at first carry out following chemical reaction in zone of oxidation:
Above hot gas enters also, and layer carries out following reaction again:
The used oxygen-rich air of the present invention system is from non-Deep Cooling Method air separation facility (for example pressure swing adsorption process, membrane separation process or additive method).Therefore cost is comparatively cheap.
In the oxygen-rich air, the concentration of oxygen is to be controlled at 40-60%; The semi-water gas of producing has following composition:
V% CO
2O
2CO H
2CH
4N
2
11～13??0.05～0.2??40～42??24～28??0.1～0.3??20.5～23
Synthetic ammonia coke per ton (rolling over 84% fixed carbon) consumption～1250kg
Synthetic ammonia pure oxygen per ton (rolling over 100% oxygen) consumes～490 mark rice
3
The semi-water gas temperature that the present invention produces from vapourizing furnace is about 650～700 ℃, directly enters waste heat boiler and pays the superheated vapour (about 380 ℃ of temperature) that produces 1.5～4.0 MPa pressure, can realize that the native system steam self-support has a surplus.From about 220 ℃ of the gas temperature of waste heat boiler outlet, after the washing tower purifying and cooling, directly be sent to shift conversion step.The present invention is because gasification efficiency improves, and furnace bottom discharges that carbon content can be reduced in the lime-ash＜and 6%.Utilize the present invention to being that the small and medium ammonia synthesis plant of raw material is when undergoing technological transformation with coal (Jiao), only need to keep former U.G.I gas furnace, waste heat boiler, washing tower, all the other are as the combustion chamber, the water seal post, T-valve, hydrauliccontrol valves etc. all can be cancelled, and simplify flow process greatly, even can realize not having gas-holder operation.
Accompanying drawing of the present invention has:
Fig. 1 process flow sheet
Fig. 2 continuous gasification furnace schematic diagram
Claims (5)
1, hard coal, coke are the main raw materials of the present middle-size and small-size synthetic ammonia plant produced of China.
The gas making operation is the primary link of Ammonia Production.This process adopts the production of intermittent type gasifying process for a long time, and separate unit furnace system throughput is low, consume height, long flow path, be difficult to realize centralized Control.At above-mentioned shortcoming, the present invention adopts normal pressure continous way oxygen-enriched air gasification of coal (coke) technology to produce semi-water gas (water-gas).Its cardinal principle and process are: utilize former U.G.I type vapourizing furnace through improving, raw material is added from furnace roof, vaporized chemical adopts steam, oxygen-rich air (system water-gas is oxygen then), carries out following reaction in stove continuously:
1) in zone of oxidation:
2) at reducing zone:
Being about 650～700 ℃ through reacted semi-water gas (water-gas) temperature directly enters waste heat boiler and pays heat production vapor recovery heat; Vapor pressure can be selected voluntarily according to the user, and its pressure rating is 1.5～4.0MPa, and temperature of superheat is about 220 ℃, directly enters the washing tower purifying and cooling, is sent to follow-up workshop section then.
The semi-water gas that the continous way gasifying process is produced has following composition, can satisfy the requirement of making ammonia synthesis process:
V% CO
2O
2CO H
2CH
4N
2
11～13??0.05～0.2??40～42??24～28??0.1～0.3??20.5～23
2, normal pressure continous way oxygen-enriched air gasification of coal (coke) technology according to claim 1 is characterized in that the content of oxygen in oxygen-rich air is 40～60%(volume ratio).
Oxygen is from the non-Deep Cooling Method air separation facility (for example pressure swing adsorption process, membrane sepn and additive method) of cheapness.
3, its flow process of normal pressure continous way oxygen-enriched air gasification of coal (coke) technology according to claim 1 and 2 (seeing specification sheets Fig. 1) is: crude fuel (hard coal, Jiao) add from furnace roof through charging machine, vaporized chemical (steam, oxygen-rich air) is sent into from the bottom of stove, the semi-water gas of producing directly enters waste heat boiler and produces steam, is sent to shift conversion step again after washing tower cooling dedusting through the semi-water gas after the recovery of heat.
Mixed mutually with air before several machines of air drum from the oxygen enrichment of non-Deep Cooling Method air separation facility (with pressure swing adsorption process, membrane separation process or additive method) and to boost, add vapourizing furnace with steam then.
4, according to the described process characteristic of claim 1-3, major equipment of the present invention-the oxygen-rich air vapourizing furnace is realized after transforming at former U.G.I type intermittent type fixed level gas cooker continuously.Charging machine can satisfy continuous gasification feed, sealing, realization safety in production
5, according to claim 1-4, the continuous oxygen-rich air gasified boiler system of normal pressure system joins together with pressure-swing absorption apparatus or membrane separation unit and other system oxygen new technology devices and realizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93110917 CN1092799A (en) | 1993-03-23 | 1993-03-23 | Coal (Jiao) process for atmospheric continuous oxygen-enriched air gasification of coal (coke) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93110917 CN1092799A (en) | 1993-03-23 | 1993-03-23 | Coal (Jiao) process for atmospheric continuous oxygen-enriched air gasification of coal (coke) |
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| Publication Number | Publication Date |
|---|---|
| CN1092799A true CN1092799A (en) | 1994-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 93110917 Pending CN1092799A (en) | 1993-03-23 | 1993-03-23 | Coal (Jiao) process for atmospheric continuous oxygen-enriched air gasification of coal (coke) |
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| CN (1) | CN1092799A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057322C (en) * | 1996-12-30 | 2000-10-11 | 金群英 | Method for continuously gasifying coal (coke) and purifying synthesized gas |
| 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 |
| CN102206512A (en) * | 2011-04-25 | 2011-10-05 | 湖北双环科技股份有限公司 | Method for preparing semiwater gas through oxygen-rich air continuous gasification |
| CN102329644A (en) * | 2011-09-09 | 2012-01-25 | 云南华盛化工有限公司 | Method for preparing coal gas from rich oxygen |
| CN102559266A (en) * | 2011-12-28 | 2012-07-11 | 河南昌昱实业有限公司 | Method for producing water gas by pure oxygen continuous gasification in fixed bed |
| CN101497819B (en) * | 2009-03-06 | 2012-07-25 | 武汉奥泰自动化工程有限责任公司 | Oxygenation intermittent coal gas preparation |
| CN101475839B (en) * | 2009-01-08 | 2012-10-31 | 北京名都厚德科技有限公司 | Coupling fixed bed oxygen-enriched continuous gasification process |
| CN104789266A (en) * | 2015-03-23 | 2015-07-22 | 七台河宝泰隆煤化工股份有限公司 | Coal gas generating method |
-
1993
- 1993-03-23 CN CN 93110917 patent/CN1092799A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057322C (en) * | 1996-12-30 | 2000-10-11 | 金群英 | Method for continuously gasifying coal (coke) and purifying synthesized gas |
| 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 |
| CN101475839B (en) * | 2009-01-08 | 2012-10-31 | 北京名都厚德科技有限公司 | Coupling fixed bed oxygen-enriched continuous gasification process |
| CN101497819B (en) * | 2009-03-06 | 2012-07-25 | 武汉奥泰自动化工程有限责任公司 | Oxygenation intermittent coal gas preparation |
| CN102206512A (en) * | 2011-04-25 | 2011-10-05 | 湖北双环科技股份有限公司 | Method for preparing semiwater gas through oxygen-rich air continuous gasification |
| CN102329644A (en) * | 2011-09-09 | 2012-01-25 | 云南华盛化工有限公司 | Method for preparing coal gas from rich oxygen |
| CN102559266A (en) * | 2011-12-28 | 2012-07-11 | 河南昌昱实业有限公司 | Method for producing water gas by pure oxygen continuous gasification in fixed bed |
| CN102559266B (en) * | 2011-12-28 | 2015-03-18 | 河南昌昱实业有限公司 | Method for producing water gas by pure oxygen continuous gasification in fixed bed |
| CN104789266A (en) * | 2015-03-23 | 2015-07-22 | 七台河宝泰隆煤化工股份有限公司 | Coal gas generating method |
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