CN109098855A - A kind of coal gasification supercritical carbon dioxide electricity generation system and method - Google Patents
A kind of coal gasification supercritical carbon dioxide electricity generation system and method Download PDFInfo
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- CN109098855A CN109098855A CN201811280646.4A CN201811280646A CN109098855A CN 109098855 A CN109098855 A CN 109098855A CN 201811280646 A CN201811280646 A CN 201811280646A CN 109098855 A CN109098855 A CN 109098855A
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- CN
- China
- Prior art keywords
- carbon dioxide
- gas
- burner
- coal gasification
- supercritical carbon
- Prior art date
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Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 142
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 71
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 70
- 239000003245 coal Substances 0.000 title claims abstract description 41
- 238000002309 gasification Methods 0.000 title claims abstract description 37
- 230000005611 electricity Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 45
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 14
- 239000002817 coal dust Substances 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 230000008676 import Effects 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 230000017105 transposition Effects 0.000 claims description 6
- 239000003034 coal gas Substances 0.000 claims description 5
- 238000010248 power generation Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 241000790917 Dioxys <bee> Species 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 229960004424 carbon dioxide Drugs 0.000 description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
- F02C3/26—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being solid or pulverulent, e.g. in slurry or suspension
- F02C3/28—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being solid or pulverulent, e.g. in slurry or suspension using a separate gas producer for gasifying the fuel before combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/32—Arrangement, mounting, or driving, of auxiliaries
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention provides a kind of coal gasification supercritical carbon dioxide electricity generation system and method, including air-separating plant, burner, turbine and gas-circulating system, wherein, the oxygen outlet of air-separating plant and the oxygen inlet of burner connect, burner is also connected with gas piping, the air inlet of carbon dioxide outlet and turbine on burner connects, and the air exit of turbine is again introduced into burner by gas-circulating system；The structure can greatly improve heat to power output efficiency, reduce equipment volume, have very high economy.
Description
Technical field
The invention belongs to supercritical carbon dioxide technical field of power generation more particularly to a kind of coal gasification supercritical carbon dioxides
Electricity generation system and method.
Background technique
The energy and environment are two hang-ups that human social development faces, and it is power industry that generating set efficiency, which is continuously improved,
The eternal theme and target of research.Power cycle more common at present includes using water as the Rankine cycle of working medium and using air as work
The Brayton cycle of matter.Conventional coal-burning power plant is mainly using water as the Rankine cycle of working medium, and maximum gigawatt is coal-fired at present
The steam initial conditions in power station have reached 31MPa, and 620 DEG C.Gas turbine is mainly using air as the Brayton cycle of working medium, at present
More than 1700 DEG C, advanced heavy duty gas turbine turbine-inlet temperature has reached advanced aero engine turbine inlet gas temperature
1600℃.The limitation that working medium initial conditions receive material is further increased, there are certain difficulties.
Summary of the invention
The purpose of the present invention is to provide a kind of coal gasification supercritical carbon dioxide electricity generation system and methods, solve existing
Limited by material because of working medium initial conditions, have the defects that generating set efficiency cannot improve.
In order to achieve the above object, the technical solution adopted by the present invention is that:
The present invention provides a kind of coal gasification supercritical carbon dioxide electricity generation system, including air-separating plant, burner, thoroughly
Gentle gas-circulating system, wherein the oxygen outlet of air-separating plant and the oxygen inlet of burner connect, and burner also connects
It is connected to gas piping, the air inlet connection of carbon dioxide outlet and turbine on burner, the air exit of turbine passes through gas
The circulatory system is again introduced into burner.
Preferably, the oxygen outlet of the air-separating plant is also connected with coal gasification apparatus, the coal gas of coal gasification apparatus
Outlet is connect with burner.
Preferably, the nitrogen outlet on air-separating plant is connected with coal dust drying device, the coal dust of coal dust drying device
Outlet is connected with the coal powder entrance of coal gasification apparatus.
Preferably, gas cleaning device is provided between the gas exit and burner of coal gasification apparatus.
Preferably, gas-circulating system includes regenerator and purification transposition, wherein the air exit of turbine and regenerator
High-temperature gas import connection, regenerator cryogenic gas outlet connect with the import of purifying plant, the outlet of purifying plant and time
The cryogenic gas import of hot device connects, and the high-temperature gas outlet of regenerator is connect with burner.
Preferably, gas-circulating system further includes the first cooler and the first carbon dioxide supercharging device, wherein first is cold
But device setting is exported in regenerator cryogenic gas and is purified between transposition gas feed；The setting of first carbon dioxide supercharging device exists
It purifies between transposition gas vent and regenerator cryogenic gas import.
Preferably, gas-circulating system further includes the second cooler and the second carbon dioxide supercharging device, wherein second is cold
But device and the second carbon dioxide supercharging device are successively set on the first carbon dioxide supercharging device and regenerator cryogenic gas import
Between.
Preferably, carbon dioxide recovery device is provided between the outlet of purifying plant and the cryogenic gas import of regenerator.
Preferably, purifying plant is separator.
A kind of coal gasification supercritical carbon dioxide electricity-generating method, based on a kind of coal gasification supercritical carbon dioxide power generation system
System, comprising the following steps:
Air, which enters, carries out gas separation in air-separating plant, the oxygen isolated and coal dust enter in burner, with
One combust of natural gas in burner, generates the supercritical carbon dioxide of high temperature, and the supercritical carbon dioxide of high temperature is from burning
The outlet of device, which enters, carries out acting power generation in turbine；The air exit of turbine is again introduced into burner by gas-circulating system.
Compared with prior art, the beneficial effects of the present invention are:
A kind of coal gasification supercritical carbon dioxide electricity generation system provided by the invention, in order to break through the bottle of conventional power system
Neck, the present invention are used using coal gas as fuel, and by oxygen-enriched combustion system, realize that carbon dioxide traps entirely, with carbon dioxide
It does work in turbine for working medium, carbon dioxide is expanded into subcritical state in turbine, and expansion ratio is higher than supercritical carbon dioxide
Brayton cycle, therefore to go out function more for turbine, improves cycle efficieny；The structure can greatly improve heat to power output efficiency, reduce
Equipment volume has very high economy.
Further, using classification pressuring method, two-phase section is avoided, discharge gasification latent heat is not needed, can be improved two
The cooling temperature of carbonoxide so as to cooled carbon dioxide at normal temperature, and reduces work done during compression.
Further, the nitrogen generated using air separation unit is dry and preheats coal dust, so that resource is rationally utilized.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of supercritical carbon dioxide electricity generation system；
Wherein, 1, air-separating plant 2, burner 3, turbine 4, regenerator 5, the first cooler 6, separator
7, the first carbon dioxide supercharging device 8, the second cooler 9, the second carbon dioxide supercharging device 10, carbon dioxide recovery device
11, coal dust drying device 12, coal gasification apparatus 13, gas cleaning device.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in more detail.
As shown in Figure 1, a kind of coal gasification supercritical carbon dioxide electricity generation system provided by the invention, including air separation dress
It is cold to set 1, burner 2, turbine 3, regenerator 4, the first cooler 5, separator 6, the first carbon dioxide supercharging device 7, second
But device 8, the second carbon dioxide supercharging device 9, carbon dioxide recovering apparatus 10, coal dust drying device 11,12 and of coal gasification apparatus
Gas cleaning device 13, wherein oxygen of the oxygen outlet of air-separating plant 1 respectively with burner 2, coal gasification apparatus 12 enters
Mouth is connected, and the nitrogen outlet of air-separating plant 1 is connected with the nitrogen inlet of coal dust drying device 11, coal dust drying device 11
Dry pulverized coal outlet is connected with the coal powder entrance of coal gasification apparatus 12, the gas exit and gas cleaning device 13 of coal gasification apparatus 12
Gas entry be connected, the gas exit of gas cleaning device 13 is connected with 2 gas entry of burner, the outlet of burner 2 and
The entrance of carbon dioxide turbine 3 is connected, and the outlet of carbon dioxide turbine 3 is connected with the hot-side inlet of regenerator 4, regenerator 4
Hot end outlet is connected with the entrance of cooler 15, and the entrance that the outlet of cooler 15 is separated from water device 6 is connected, separator 6
Carbon dioxide outlet is connected with the entrance of carbon dioxide supercharging device 17, the outlet of carbon dioxide supercharging device 17 and cooler 28
Entrance be connected, the outlet of cooler 28 is connected with the entrance of carbon dioxide supercharging device 29, carbon dioxide supercharging device 29
Outlet is connected with the cold-side inlet of the entrance of carbon dioxide recovering apparatus 10 and regenerator 4 respectively, the cold side outlet of regenerator 4
It is connected with the carbon dioxide entrance of burner 2.
Process description:
The nitrogen that coal dust is come out in coal dust drying device by air-separating plant 1 is dry, subsequently into coal gasification apparatus
12, oxygen a part that air-separating plant 1 comes out enters coal gasification apparatus 12, and a part enters burner 2, coal gasification apparatus
Coal is become coal gas by 12, subsequently into gas cleaning device 13 purify, purified coal gas, from air-separating plant 1 come out
Partial oxidation, the supercritical carbon dioxide working medium in regenerator 4 after backheat enter the burning of burner 2, combustor exit together
High temperature and pressure working medium supercritical carbon dioxide enter carbon dioxide turbine 3 acting power generation, outlet supercritical carbon dioxide return
It after carrying out waste heat recycling in hot device 4, is separated water into separator 6, the pure carbon dioxide of outlet is pressurized in carbon dioxide to be filled
It sets in 17 and is pressurized, be then cooled in cooler 28, then boosted by carbon dioxide supercharging device 29.At this point, extra
Carbon dioxide is separated into carbon dioxide recovering apparatus 10 or for other purposes, remaining carbon dioxide is in regenerator
In be heated after continue cycling through.
Claims (10)
1. a kind of coal gasification supercritical carbon dioxide electricity generation system, which is characterized in that including air-separating plant (1), burner
(2), turbine (3) and gas-circulating system, wherein the oxygen outlet of air-separating plant (1) and the oxygen inlet of burner (2)
Connection, burner (2) are also connected with gas piping, and the air inlet of the carbon dioxide outlet on burner (2) and turbine (3) connects
It connects, the air exit of turbine (3) is again introduced into burner (2) by gas-circulating system.
2. a kind of coal gasification supercritical carbon dioxide electricity generation system according to claim 1, which is characterized in that the air
The oxygen outlet of separator (1) is also connected with coal gasification apparatus (12), the gas exit and burner of coal gasification apparatus (12)
(2) it connects.
3. a kind of coal gasification supercritical carbon dioxide electricity generation system according to claim 2, which is characterized in that air separation
Nitrogen outlet on device (1) is connected with coal dust drying device (11), the discharge and coal gasification of coal dust drying device (11)
The coal powder entrance of device (12) is connected.
4. a kind of coal gasification supercritical carbon dioxide electricity generation system according to claim 3, which is characterized in that coal gas makeup
It sets and is provided with gas cleaning device (13) between the gas exit of (12) and burner (2).
5. a kind of coal gasification supercritical carbon dioxide electricity generation system according to claim 1, which is characterized in that gas circulation
System includes regenerator (4) and purification transposition, wherein the air exit of turbine (3) and the high-temperature gas import of regenerator (4) connect
It connects, the cryogenic gas outlet of regenerator (4) is connect with the import of purifying plant, and the outlet of purifying plant is low with regenerator (4)
The high-temperature gas outlet of warm gas feed connection, regenerator (4) is connect with burner (2).
6. a kind of coal gasification supercritical carbon dioxide electricity generation system according to claim 5, which is characterized in that gas circulation
System further includes the first cooler (5) and the first carbon dioxide supercharging device (7), wherein the first cooler (5) is arranged in backheat
Between the outlet of device (4) cryogenic gas and purification transposition gas feed；The setting of first carbon dioxide supercharging device (7) is in purification transposition
Between gas vent and regenerator (4) cryogenic gas import.
7. a kind of coal gasification supercritical carbon dioxide electricity generation system according to claim 6, which is characterized in that gas circulation
System further includes the second cooler (8) and the second carbon dioxide supercharging device (9), wherein the second cooler (8) and the second dioxy
Change carbon supercharging device (8) to be successively set between the first carbon dioxide supercharging device (7) and regenerator (4) cryogenic gas import.
8. a kind of coal gasification supercritical carbon dioxide electricity generation system according to claim 5, which is characterized in that purifying plant
Outlet and regenerator (4) cryogenic gas import between be provided with carbon dioxide recovery device (10).
9. a kind of coal gasification supercritical carbon dioxide electricity generation system, feature according to any one of claim 5-8 exist
In purifying plant is separator (6).
10. a kind of coal gasification supercritical carbon dioxide electricity-generating method, which is characterized in that be based on a kind of coal described in claim 1
Gasify supercritical carbon dioxide electricity generation system, comprising the following steps:
Air, which enters, carries out gas separation in air-separating plant (1), the oxygen isolated and coal dust enter in burner (2),
With one combust of natural gas in burner (2), generate the supercritical carbon dioxide of high temperature, the supercritical carbon dioxide of high temperature from
The outlet of burner (2), which enters in turbine (3), carries out acting power generation；The air exit of turbine (3) passes through gas-circulating system again
It is secondary to enter burner (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811280646.4A CN109098855A (en) | 2018-10-30 | 2018-10-30 | A kind of coal gasification supercritical carbon dioxide electricity generation system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811280646.4A CN109098855A (en) | 2018-10-30 | 2018-10-30 | A kind of coal gasification supercritical carbon dioxide electricity generation system and method |
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| Publication Number | Publication Date |
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| CN109098855A true CN109098855A (en) | 2018-12-28 |
Family
ID=64869835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811280646.4A Pending CN109098855A (en) | 2018-10-30 | 2018-10-30 | A kind of coal gasification supercritical carbon dioxide electricity generation system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810259A (en) * | 2020-05-26 | 2020-10-23 | 新奥科技发展有限公司 | Method and system for utilizing carbon dioxide |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04275393A (en) * | 1991-03-01 | 1992-09-30 | Ishikawajima Harima Heavy Ind Co Ltd | Composite power generation unit with coal gasification |
| JP2012087974A (en) * | 2010-10-18 | 2012-05-10 | Central Res Inst Of Electric Power Ind | Coal-fired power generation system |
| CN105820842A (en) * | 2016-05-19 | 2016-08-03 | 中国科学院工程热物理研究所 | Gasification supercritical CO2 cycle power generation system |
| CN108374720A (en) * | 2018-01-24 | 2018-08-07 | 西安热工研究院有限公司 | A kind of IGCC power generation system of coal gas-supercritical carbon dioxide recompression cycle |
| CN209838541U (en) * | 2018-10-30 | 2019-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Coal gasification supercritical carbon dioxide power generation device |
-
2018
- 2018-10-30 CN CN201811280646.4A patent/CN109098855A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04275393A (en) * | 1991-03-01 | 1992-09-30 | Ishikawajima Harima Heavy Ind Co Ltd | Composite power generation unit with coal gasification |
| JP2012087974A (en) * | 2010-10-18 | 2012-05-10 | Central Res Inst Of Electric Power Ind | Coal-fired power generation system |
| CN105820842A (en) * | 2016-05-19 | 2016-08-03 | 中国科学院工程热物理研究所 | Gasification supercritical CO2 cycle power generation system |
| CN108374720A (en) * | 2018-01-24 | 2018-08-07 | 西安热工研究院有限公司 | A kind of IGCC power generation system of coal gas-supercritical carbon dioxide recompression cycle |
| CN209838541U (en) * | 2018-10-30 | 2019-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Coal gasification supercritical carbon dioxide power generation device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810259A (en) * | 2020-05-26 | 2020-10-23 | 新奥科技发展有限公司 | Method and system for utilizing carbon dioxide |
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