CN101451078A - Method for recovering high temperature gasified gas heat from pressurized entrained-bed gasification device - Google Patents
Method for recovering high temperature gasified gas heat from pressurized entrained-bed gasification device Download PDFInfo
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- CN101451078A CN101451078A CNA2008101804851A CN200810180485A CN101451078A CN 101451078 A CN101451078 A CN 101451078A CN A2008101804851 A CNA2008101804851 A CN A2008101804851A CN 200810180485 A CN200810180485 A CN 200810180485A CN 101451078 A CN101451078 A CN 101451078A
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- entrained flow
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- 238000002309 gasification Methods 0.000 title claims abstract description 126
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000002918 waste heat Substances 0.000 claims abstract description 28
- 238000010791 quenching Methods 0.000 claims description 29
- 239000000843 powder Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 11
- 238000001816 cooling Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract 2
- 239000000112 cooling gas Substances 0.000 description 11
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention relates to a method for recovering high-temperature gasified gas heat of a pressurized airflow bed gasification device and belongs to the field of coal gasification. The method is characterized in that gasified gas of an airflow bed gasification unit 2 is mixed with gasified gas of an airflow bed gasification unit 1 after chilling a unit by water, and the mixed gasified gases are injected into a convection waste heat boiler to generate high-pressure steam; the pressure of the airflow bed gasification unit 2 is higher than that of the airflow bed gasification unit 1; and the temperature of the mixed gasified gases injected into the convection waste heat boiler is below 1,050 DEG C. The invention combines the advantages of a waste heat boiler and water chilling technology, and solves the inevitable problem of gas cooling at a waste boiler inlet when adopting a separate waste boiler to recover heat, thereby ensuring economical efficiency and practicality. The method has the advantages of less processing equipment investment, low energy consumption and very high economic benefit.
Description
Technical field:
The present invention relates to a kind of method that reclaims high temperature gasified gas heat from pressurized entrained-bed gasification device.
Background technology:
In the existing pressurized air flow bed gasification technology, the heat that adopts waste heat boiler to reclaim high-temperature gasification gas generally has dual mode: a kind of is that high-temperature gasification gas is at first sent into radiation waste-heat boiler, enters the convection type waste heat boiler after the cooling; Another kind is that (what above two kinds of ways will solve is a same problem: vaporizer gasifying gas temperature out generally is higher than the withstand temp of metallic substance with turning back to the vapourizing furnace outlet after the pressurization of the compressed machine of the cooled gas of waste heat boiler, must reduce temperature and just can enter the convection type waste heat boiler, above dual mode can both reach the purpose of cooling).Find that in actual use the radiation waste-heat boiler cost is high, take up an area of greatly, uneconomical practicality, and the method that adopts the compressed machine pressurization of cooling gas to return the vapourizing furnace outlet is not only invested height, and increased energy consumption.Make water Quench mode reclaim the heat of high-temperature gasification gas at home in addition, but that this mode is used in power industry thermo-efficiency is on the low side.
Summary of the invention:
It is abundant inadequately that the present invention solves the method that adopts waste heat boiler to reclaim the high-temperature gasification gas heat in the present air flow bed pressurized gasification technology, existing method investment and energy consumption be ideal problem not really all, adopt shock gas cooling down high-temperature gasifying gas, adjust the temperature that gas temperature can bear to convection type waste heat boiler metallic substance, directly gas is sent into the heat that the convection type waste heat boiler reclaims high-temperature gas.
A kind of method that reclaims high temperature gasified gas heat from pressurized entrained-bed gasification device, it is characterized in that: the gasifying gas of entrained flow gasification unit 2 confuses with the gasifying gas of entrained flow gasification unit 1 behind water Quench unit and enters the convection type waste heat boiler and produce high pressure steam, the pressure of described entrained flow gasification unit 2 is higher than the pressure of entrained flow gasification unit 1, and the described mixing gasifying gas temperature that enters the convection type waste heat boiler is below 1050 ℃.
The gasifying gas temperature of described entrained flow gasification unit 1 and entrained flow gasification unit 2 is 1200～1750 ℃.
The temperature of the gasifying gas of described entrained flow gasification unit 2 behind water Quench unit is 200～300 ℃.
The gasifying gas temperature of described entrained flow gasification unit 1 and entrained flow gasification unit 2 is 1200～1750 ℃, and the temperature of the gasifying gas of described entrained flow gasification unit 2 behind water Quench unit is 200～250 ℃.
The raw material of described entrained flow gasification unit 1 and entrained flow gasification unit 2 is dry powder form or slurry form.
The present invention is in conjunction with the advantage of waste heat boiler and water Quench technology, and the heat of high-temperature gasification gas is finally reclaimed with the form of the high-pressure and high-temperature steam in the waste heat boiler, can satisfy multiple user demand.The present invention obtains low temperature gasification gas with one of them gasification unit (being gasification unit 2) water Quench, gasifying gas with another gasification unit (being gasification unit 1) mixes again, its mixed gas is reduced to below 1050 ℃, because the pressure of entrained flow gasification unit 2 is higher than the pressure of entrained flow gasification unit 1, the gas of (the pressure 0.5MPa that the pressure of general entrained flow gasification unit 2 is higher than entrained flow gasification unit 1 gets final product) so gasification unit 2 can enter swimmingly in the gasification unit 1 and mix, then mixed gas enters and reclaims heat in the waste heat boiler, obtains high temperature and high pressure steam; Water Quench mode is reduced to the low temperature remix with gas, the mixed gas temperature is reduced to below 1050 ℃, reach below the temperature that convection type waste heat boiler material bears, reduced the significant investment of radiant-type boiler, make facility investment few, energy consumption is low, and technology utilization a set of equipment of the present invention investment is economical and practical with regard to realizing handling simultaneously the high-temperature gasification gas of two gasification unit.
Preferably the 1 high-temperature gasification gas temperature that produces is 1200～1750 ℃ in the entrained flow gasification unit, and the high-temperature gasification gas temperature that entrained flow gasification unit 2 produces is 1200～1750 ℃.
Gasifying gas temperature after Quench of preferred entrained flow gasification unit 2 is reduced to 200～250 ℃.
The selection of said temperature scope can be easier to the temperature of mixed gas is controlled at below 1050 ℃, makes technical process easy and simple to handle, rationally.
The present invention is unqualified to entering the unitary raw material of entrained flow gasification, can be dry powder form, can also be slurry form, and entrained flow gasification unit 1, solidifies the slag form and discharges with melting attitude water Quench with dry ash form deslagging and gasification furnace gas unit 2.
The present invention combines the advantage of waste heat boiler and water Quench technology, utilizes a set of equipment investment with regard to realizing handling simultaneously the high-temperature gasification gas of two gasification unit, and is economical and practical.Technological equipment investment of the present invention is few, and energy consumption is low, has very high economic benefit.
Description of drawings:
Fig. 1 is the process flow diagram of the inventive method.
Embodiment:
The inventive method by entrained flow gasification unit 1, entrained flow gasification unit 2, water Quench unit, convection type waste heat boiler totally 4 the part form.
Embodiment 1: coal (Jiao), water (water vapour) are with dry powder or coal water slurry mode, and oxygen enters entrained flow gasification unit 1 and entrained flow gasification unit 2 in the gaseous state mode.In entrained flow gasification unit 1, produce 1200 ℃ high-temperature gasification gas, the pressure of entrained flow gasification unit 2 is higher than entrained flow gasification unit 1.In entrained flow gasification unit 2, the high-temperature gas that produces 1500 ℃ enters water Quench unit, and temperature is reduced to 210 ℃, and the gas after the cooling is sent into entrained flow gasification unit 1 as cooling gas.Owing to be higher than entrained flow gasification unit 1 through the unitary gasifying gas pressure of water Quench, make cooling gas can enter in the entrained flow gasification unit 1 swimmingly, mixed gas is cooled to about 1050 ℃, be sent to again and reclaim the heat of gasifying gas in the convection type waste heat boiler and produce steam, can satisfy different demands.Entrained flow gasification unit 1 is with dry ash form deslagging, and vapourizing furnace gasification unit 2 is solidified the slag form and discharged with melting attitude water Quench.
Embodiment 2: coal (Jiao), water (water vapour) are with dry powder or coal water slurry mode, and oxygen enters entrained flow gasification unit 1 and entrained flow gasification unit 2 in the gaseous state mode.In entrained flow gasification unit 1, produce 1750 ℃ high-temperature gasification gas, the pressure of entrained flow gasification unit 2 is higher than entrained flow gasification unit 1.In entrained flow gasification unit 2, the high-temperature gas that produces 1200 ℃ enters water Quench unit, and temperature is reduced to 220 ℃, and the gas after the cooling is sent into entrained flow gasification unit 1 as cooling gas.Owing to be higher than entrained flow gasification unit 1 through the unitary gasifying gas pressure of water Quench, make cooling gas can enter in the entrained flow gasification unit 1 swimmingly, mixed gas is cooled to below 1000 ℃, be sent to again and reclaim the heat of gasifying gas in the convection type waste heat boiler and produce steam, can satisfy different demands.Entrained flow gasification unit 1 is with dry ash form deslagging, and vapourizing furnace gasification unit 2 is solidified the slag form and discharged with melting attitude water Quench.
Embodiment 3: coal (Jiao), water (water vapour) are with dry powder or coal water slurry mode, and oxygen enters entrained flow gasification unit 1 and entrained flow gasification unit 2 in the gaseous state mode.In entrained flow gasification unit 1, produce 1350 ℃ high-temperature gasification gas, the pressure of entrained flow gasification unit 2 is higher than entrained flow gasification unit 1.In entrained flow gasification unit 2, the high-temperature gas that produces 1350 ℃ enters water Quench unit, and temperature is reduced to 230 ℃, and the gas after the cooling is sent into entrained flow gasification unit 1 as cooling gas.Owing to be higher than entrained flow gasification unit 1 through the unitary gasifying gas pressure of water Quench, make cooling gas can enter in the entrained flow gasification unit 1 swimmingly, mixed gas is cooled to below 950 ℃, be sent to again and reclaim the heat of gasifying gas in the convection type waste heat boiler and produce steam, can satisfy different demands.Entrained flow gasification unit 1 is with dry ash form deslagging, and vapourizing furnace gasification unit 2 is solidified the slag form and discharged with melting attitude water Quench.
Embodiment 4: coal (Jiao), water (water vapour) are with dry powder or coal water slurry mode, and oxygen enters entrained flow gasification unit 1 and entrained flow gasification unit 2 in the gaseous state mode.In entrained flow gasification unit 1, produce 1200 ℃ high-temperature gasification gas, the pressure of entrained flow gasification unit 2 is higher than entrained flow gasification unit 1.In entrained flow gasification unit 2, the high-temperature gas that produces 1200 ℃ enters water Quench unit, and temperature is reduced to 240 ℃, and the gas after the cooling is sent into entrained flow gasification unit 1 as cooling gas.Owing to be higher than entrained flow gasification unit 1 through the unitary gasifying gas pressure of water Quench, make cooling gas can enter in the entrained flow gasification unit 1 swimmingly, mixed gas is cooled to below 850 ℃, be sent to again and reclaim the heat of gasifying gas in the convection type waste heat boiler and produce steam, can satisfy different demands.Entrained flow gasification unit 1 is with dry ash form deslagging, and vapourizing furnace gasification unit 2 is solidified the slag form and discharged with melting attitude water Quench.
Embodiment 5: coal (Jiao), water (water vapour) are with dry powder or coal water slurry mode, and oxygen enters entrained flow gasification unit 1 and entrained flow gasification unit 2 in the gaseous state mode.In entrained flow gasification unit 1, produce 1500 ℃ high-temperature gasification gas, the pressure of entrained flow gasification unit 2 is higher than entrained flow gasification unit 1.In entrained flow gasification unit 2, the high-temperature gas that produces 1250 ℃ enters water Quench unit, and temperature is reduced to 250 ℃, and the gas after the cooling is sent into entrained flow gasification unit 1 as cooling gas.Owing to be higher than entrained flow gasification unit 1 through the unitary gasifying gas pressure of water Quench, make cooling gas can enter in the entrained flow gasification unit 1 swimmingly, mixed gas is cooled to below 800 ℃, be sent to again and reclaim the heat of gasifying gas in the convection type waste heat boiler and produce steam, can satisfy different demands.Entrained flow gasification unit 1 is with dry ash form deslagging, and vapourizing furnace gasification unit 2 is solidified the slag form and discharged with melting attitude water Quench.
The present invention combines the advantage of waste heat boiler and water Quench technology, has solved the useless pot of independent use and has reclaimed that heat must process Useless pot inlet gas cooling problem, economical and practical. Technological equipment investment of the present invention is few, and energy consumption is low, has very high economic benefit.
Claims (5)
1, a kind of method that reclaims high temperature gasified gas heat from pressurized entrained-bed gasification device, it is characterized in that: the gasifying gas of entrained flow gasification unit 2 is mixed with the gasifying gas of entrained flow gasification unit 1 behind water Quench unit and enters the convection type waste heat boiler and produce high pressure steam, the pressure of described entrained flow gasification unit 2 is higher than the pressure of entrained flow gasification unit 1, and the described mixing gasifying gas temperature that enters the convection type waste heat boiler is below 1050 ℃.
2, method according to claim 1, the gasifying gas temperature of described entrained flow gasification unit 1 and entrained flow gasification unit 2 is 1200～1750 ℃.
3, method according to claim 1, the temperature of the gasifying gas of described entrained flow gasification unit 2 behind water Quench unit is 200～300 ℃.
4, method according to claim 1, the gasifying gas temperature of described entrained flow gasification unit 1 and entrained flow gasification unit 2 is 1200～1750 ℃.
5, method according to claim 1, the raw material of described entrained flow gasification unit 1 and entrained flow gasification unit 2 is dry powder form or slurry form.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101804851A CN101451078B (en) | 2008-04-03 | 2008-11-28 | Method for recovering high temperature gasified gas heat from pressurized entrained-bed gasification device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810103366 | 2008-04-03 | ||
| CN200810103366.6 | 2008-04-03 | ||
| CN2008101804851A CN101451078B (en) | 2008-04-03 | 2008-11-28 | Method for recovering high temperature gasified gas heat from pressurized entrained-bed gasification device |
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| CN101451078A true CN101451078A (en) | 2009-06-10 |
| CN101451078B CN101451078B (en) | 2012-10-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768474B (en) * | 2010-02-05 | 2013-01-30 | 刘金成 | Waste heat recovery process for high-temperature rough gas of entrained flow bed |
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| CN2700718Y (en) * | 2004-06-02 | 2005-05-18 | 西北化工研究院 | Dried powder solid fuel gasification furnace |
| CN1318550C (en) * | 2005-07-01 | 2007-05-30 | 煤炭科学研究总院北京煤化工研究分院<Del/> | Process for pressurized gasification of dry coal fines |
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| CN101768474B (en) * | 2010-02-05 | 2013-01-30 | 刘金成 | Waste heat recovery process for high-temperature rough gas of entrained flow bed |
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