CN203258668U - Oxygen-enriched combustion heat utilizing device - Google Patents
Oxygen-enriched combustion heat utilizing device Download PDFInfo
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- CN203258668U CN203258668U CN2013202238778U CN201320223877U CN203258668U CN 203258668 U CN203258668 U CN 203258668U CN 2013202238778 U CN2013202238778 U CN 2013202238778U CN 201320223877 U CN201320223877 U CN 201320223877U CN 203258668 U CN203258668 U CN 203258668U
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- flue gas
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
本实用新型公开一种富氧燃烧热量利用的装置，该装置包括锅炉(1)、氧气预热器(2)、循环烟气预热器(3)、烟气给水加热器、压缩空气低压给水加热器(9)、压缩烟气低压给水加热器(12)、空气压缩机(8)、烟气压缩机(11)、制氧系统(10)和烟气净化压缩系统(13)；该实用新型可以显著提高富氧燃烧电站的发电效率，降低燃煤电站CO2捕集的成本。
The utility model discloses a device for utilizing oxygen-enriched combustion heat, which comprises a boiler (1), an oxygen preheater (2), a circulating flue gas preheater (3), a flue gas water supply heater, and compressed air low pressure water supply Heater (9), compressed flue gas low-pressure feed water heater (12), air compressor (8), flue gas compressor (11), oxygen generation system (10) and flue gas purification compression system (13); The new type can significantly improve the power generation efficiency of oxy-fuel combustion power plants and reduce the cost of CO2 capture in coal-fired power plants.
Description
Technical field
The utility model relates to a kind of oxygen-enriched combusting heat utilization device, belongs to energy technology and green technology crossing domain.
Background technology
A large amount of greenhouse gases CO of combustion of fossil fuel discharging
2The harm that environment is caused has caused showing great attention to of the whole world.At numerous CO
2In the middle of the separation and collection technology, but oxygen-enriched combustion technology reclaims CO as a kind of novel low-cost separation
2And the combustion system of the brand new ideas that pollutant emission is lower has caused various countries researchers' attention.
Owing to increased air separation subsystem and gas cleaning compression subsystem, the more conventional unit of unit generation efficient reduces by 8%～12%, has restricted the oxygen-enriched combustion technology commercial applications.Oxygen-enriched combustion system is comparatively complicated, has larger optimization space.Especially produce a large amount of low-grade used heat in oxygen subsystem processed and the gas cleaning compression subsystem, take full advantage of this part waste heat boiler low pressure feed water, can reduce bleeder steam, improve steam turbine acting amount.Simultaneously, adopt the flue gas feedwater, can effectively control exhaust gas temperature, realize the utilization of heat recovery, Effective Raise unit generation efficient.
The utility model content
Technical problem: the purpose of this utility model is to disclose a kind of oxygen-enriched combusting unit heat utilization device, and this device can significantly improve the heat comprehensive utilization ratio.
Technical scheme: for solving the problems of the technologies described above, the utility model provides a kind of device of oxygen-enriched combusting Btu utilization, and this device comprises boiler, oxygen preheat device, circulating flue gas preheater, flue gas feed-water heater, compressed air low-pressure feed-water heater, compression flue gas low-pressure feed heater, air compressor, flue gas compressor, oxygen generation system and gas cleaning compressibility;
Boiler comprises the first smoke outlet, the second smoke outlet and the 3rd smoke outlet, and the first smoke outlet links to each other with oxygen preheat device gas approach end; The second smoke outlet links to each other with the gas approach end of circulating flue gas preheater, and the 3rd smoke outlet links to each other with flue gas feed-water heater gas approach end; The smoke outlet of the smoke outlet of the smoke outlet of oxygen preheat device, circulating flue gas preheater, flue gas low-pressure feed heater links to each other with the gas approach end of flue gas condenser respectively;
Air compressor air outlet slit end links to each other with compressed air low-pressure feed-water heater compressed air inlet end, the air outlet slit end of compressed air low-pressure feed-water heater links to each other with the air intlet end of oxygen generation system, and the oxygen outlet end of oxygen generation system links to each other with the oxygen inlet end of oxygen preheat device;
The flue gas compressor smoke outlet links to each other with compression flue gas low-pressure feed heater compression gas approach end; Compression flue gas low-pressure feed heater compression smoke outlet links to each other with the gas approach end of gas cleaning compressibility.
Preferably, described flue gas feed-water heater comprises flue gas high-pressure feed-water heater and flue gas low-pressure feed heater, the gas approach end of described high-pressure feed-water heater links to each other with the third part smoke outlet of described boiler, the smoke outlet of described flue gas high-pressure feed-water heater links to each other with the gas approach end of described flue gas low-pressure feed heater, and the smoke outlet of low-pressure feed heater links to each other with the gas approach end of flue gas condenser.
Preferably, the feed-water inlet end of described flue gas high-pressure feed-water heater is connected with for the first water pump that extracts the Boiler High Pressure feedwater, and the flue gas high-pressure feed-water heater arranges the pump-out of first flow controller control water pump; The feed-water inlet end of described flue gas low-pressure feed heater is connected with for the second water pump that extracts the boiler low pressure feed water, and the flue gas low-pressure feed heater arranges the pump-out of second amount controller control water pump; Described compressed air low-pressure feed-water heater feed-water inlet end is connected with for the 3rd water pump that extracts the boiler low pressure feed water, and the compressed air low-pressure feed-water heater arranges the pump-out of flow controller control water pump; Described compression flue gas low-pressure feed heater feed-water inlet end is connected with for the 4th water pump that extracts the boiler low pressure feed water, and compression flue gas low-pressure feed heater arranges the pump-out of flow controller control water pump.
Beneficial effect: beneficial effect was after the utility model adopted technique scheme: 1) recycle the used heat of oxygen generation system and gas cleaning compressibility, reduce low pressure heat regenerative system steam and bleed, increase the steam turbine acting; 2) comprehensive utilization flue gas afterbody waste heat has reduced exhaust gas temperature, improves the oxygen-enriched combusting heating efficiency.
Description of drawings
Fig. 1 is the structural representation of oxygen-enriched combusting Btu utilization.
Wherein, boiler 1; Oxygen preheat device 2; Circulating flue gas preheater 3; Low-pressure feed heater 4; High-pressure feed-water heater 5; High pressure regenerator 6; Low-pressure regenerator 7; Air compressor 8; Compressed air low-pressure feed-water heater 9; Oxygen generation system (10); Flue gas compressor 11; Compression flue gas low-pressure feed heater 11; Gas cleaning compressibility 13; The first water pump 14; The second water pump 15; The 3rd water pump 16; The 4th water pump 17.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
The utility model relates to a kind of oxygen-enriched combusting heat utilization device, and this device can significantly improve the generating efficiency in oxygen-enriched combusting power station, reduces coal fired power plant CO
2The cost that captures.Device of the present utility model.Structure as shown in Figure 1.
This device comprises boiler 1, oxygen preheat device 2, circulating flue gas preheater 3, flue gas feed-water heater, compressed air low-pressure feed-water heater 9, compression flue gas low-pressure feed heater 12, air compressor 8, flue gas compressor 11, oxygen generation system 10 and gas cleaning compressibility 13;
Boiler 1 comprises the first smoke outlet, the second smoke outlet and the 3rd smoke outlet, and the first smoke outlet links to each other with oxygen preheat device 2 gas approach ends; The second smoke outlet links to each other with the gas approach end of circulating flue gas preheater 3, and the 3rd smoke outlet links to each other with flue gas feed-water heater gas approach end; The smoke outlet of the smoke outlet of the smoke outlet of oxygen preheat device 2, circulating flue gas preheater 3, flue gas low-pressure feed heater 5 links to each other with the gas approach end of flue gas condenser 18 respectively;
Air compressor 8 air outlet slit ends link to each other with compressed air low-pressure feed-water heater 9 compressed air inlet ends, the air outlet slit end of compressed air low-pressure feed-water heater 9 links to each other with the air intlet end of oxygen generation system 10, and the oxygen outlet end of oxygen generation system 10 links to each other with the oxygen inlet end of oxygen preheat device 2;
Described flue gas feed-water heater comprises flue gas high-pressure feed-water heater 4 and flue gas low-pressure feed heater 5, the gas approach end of described high-pressure feed-water heater 4 links to each other with the third part smoke outlet of described boiler 1, the smoke outlet of described flue gas high-pressure feed-water heater 4 links to each other with the gas approach end of described flue gas low-pressure feed heater 5, and the smoke outlet of low-pressure feed heater 5 links to each other with the gas approach end of flue gas condenser 18.
The feed-water inlet end of described flue gas high-pressure feed-water heater 4 is connected with for the first water pump 8 that extracts the Boiler High Pressure feedwater, and flue gas high-pressure feed-water heater 4 arranges the pump-out of first flow controller control water pump; The feed-water inlet end of described flue gas low-pressure feed heater 5 is connected with for the second water pump 15 that extracts the boiler low pressure feed water, and flue gas low-pressure feed heater 5 arranges the pump-out of second amount controller control water pump; Described compressed air low-pressure feed-water heater 9 feed-water inlet ends are connected with for the 3rd water pump 16 that extracts the boiler low pressure feed water, and compressed air low-pressure feed-water heater 9 arranges the pump-out of flow controller control water pump; Described compression flue gas low-pressure feed heater 12 feed-water inlet ends are connected with for the 4th water pump 17 that extracts the boiler low pressure feed water, and compression flue gas low-pressure feed heater 12 arranges the pump-out of flow controller control water pump.
Above-mentioned flue gas feed-water heater can comprise flue gas high-pressure feed-water heater 4 and the flue gas low-pressure feed heater 5 that links to each other successively, the gas approach end of flue gas high-pressure feed-water heater 4 links to each other with described third part smoke outlet, flue gas high-pressure feed-water heater 4 smoke outlets link to each other with flue gas low-pressure feed heater 5 smoke outlets, the third part flue gas at first enters 4 pairs of high-pressure feed waters of flue gas high-pressure feed-water heater and heats, and then enter 5 pairs of low pressure feed waters of flue gas low-pressure feed heater and heat, realize the cascade utilization of energy, reduced the bleeder steam amount.
The air intlet end of described compressed air low-pressure feed-water heater 9 links to each other with air compressor 8 air outlet slit ends; The gas approach end of described compression flue gas low-pressure feed heater 12 links to each other with flue gas compressor 11 smoke outlets
When flue gas feed-water heater pressure-drop in pipeline is higher, for realizing smoothly feedwater flowing between flue gas feed-water heater and steam turbine, the first water pump 14 can be set between flue gas high-pressure feed-water heater 4 and steam turbine, the first water pump 14 is used for extracting high-pressure feed water, after high-pressure feed-water heater is finished heating to high-pressure feed water, this part high-pressure feed water mixes with the feedwater of high pressure regenerator heating, carries out follow-up heat treated.
In like manner, the second water pump 15 can be set between the pipeline of low-pressure feed heater 5 and steam turbine, be used for extracting the low pressure feed water of steam turbine; The 3rd water pump 16 is set between compressed air low-pressure feed-water heater 9 and steam turbine, is used for extracting the low pressure feed water of steam turbine; Between compression flue gas low-pressure feed heater 12 and steam turbine, the 4th water pump 17 is set, is used for extracting the low pressure feed water of steam turbine.
If feedwater can enter feed-water heater naturally, can omit the first water pump 14, the second water pump 15, the 3rd water pump 16 and the 4th water pump 17.
This utility model can significantly improve the generating efficiency in oxygen-enriched combusting power station, reduces coal fired power plant CO
2The cost that captures.The heat of the compressed air heat of the flue gas heat of boiler, oxygen piece-rate system processed and the compression flue gas of gas cleaning compressibility is fully utilized, realize the cascade utilization of oxygen-enriched combustion system internal energy, improved on the whole the generating efficiency of unit.
More than method and the device of oxygen-enriched combusting Btu utilization provided by the utility model is described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also enjoy some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Running of the present utility model is:
The flue gas of discharging in the boiler is shunted, formed first's flue gas, second portion flue gas and third part flue gas.
Utilize described first flue gas that the oxygen of sending into burner hearth 1 is carried out preheating, described second portion flue gas carries out preheating to the circulating flue gas of sending into burner hearth 1, and the heat of described third part flue gas is used for the heating boiler feedwater.
Actual temperature and the predetermined temperature of sending into the oxygen of burner hearth 1 are compared.
If actual temperature obviously greater than predetermined temperature, then reduces the exhaust gas volumn of first; If less than predetermined temperature, then increase the exhaust gas volumn of first.
Actual temperature and the predetermined temperature of sending into the circulating flue gas of burner hearth 1 are compared.
If actual temperature obviously greater than predetermined temperature, then reduces the exhaust gas volumn of second portion; If less than predetermined temperature, then increase the exhaust gas volumn of second portion.
The amount of first's flue gas, second portion flue gas and third part flue gas can be transferred according to the purposes of flue gas and be increased, generally speaking, the amount of first's flue gas accounts for 40%～50% of whole exhaust gas volumns, and the exhaust gas volumn of second portion accounts for 30%～40% of whole exhaust gas volumns.
First's flue gas, second portion flue gas and third part flue gas are sent into flue gas condenser 18 through mixing after the heat exchange, drying is divided into two parts after being condensed to normal temperature, a part is sent into circulating flue gas preheater 3 as circulating flue gas, and a part is sent into flue gas compressor 11.
After air was sent into air compressor compression 8, through sending into oxygen generation system 10 after 9 coolings of compressed air low-pressure feed-water heater, the oxygen that oxygen generation system 10 produces was sent into oxygen preheat device 2, and other gases that oxygen generation system 10 produces do not deal with;
The compression flue gas that the compressed air that air compressor 8 produces and flue gas compressor 11 produce heats the boiler low pressure feed water.
Described compressed air low-pressure feed-water heater 9 outlet actual water temperatures and predetermined temperature are compared, if be lower than predetermined temperature, then reduce described the 3rd water pump 16 pump-outs; If be higher than predetermined temperature, then increase described the 3rd water pump 16 pump-outs.
Described compression flue gas low-pressure feed heater 12 outlet actual water temperatures and predetermined temperature are compared, if be lower than predetermined temperature, then reduce described the 4th water pump 17 pump-outs; If be higher than predetermined temperature, then increase described the 4th water pump 17 pump-outs.
Claims (3)
1. the device of an oxygen-enriched combusting Btu utilization, it is characterized in that this device comprises boiler (1), oxygen preheat device (2), circulating flue gas preheater (3), flue gas feed-water heater, compressed air low-pressure feed-water heater (9), compression flue gas low-pressure feed heater (12), air compressor (8), flue gas compressor (11), oxygen generation system (10) and gas cleaning compressibility (13);
Boiler (1) comprises the first smoke outlet, the second smoke outlet and the 3rd smoke outlet, and the first smoke outlet links to each other with oxygen preheat device (2) gas approach end; The second smoke outlet links to each other with the gas approach end of circulating flue gas preheater (3), and the 3rd smoke outlet links to each other with flue gas feed-water heater gas approach end; The smoke outlet of the smoke outlet of the smoke outlet of oxygen preheat device (2), circulating flue gas preheater (3), flue gas low-pressure feed heater (5) links to each other with the gas approach end of flue gas condenser (18) respectively;
Air compressor (8) air outlet slit end links to each other with compressed air low-pressure feed-water heater (9) compressed air inlet end, the air outlet slit end of compressed air low-pressure feed-water heater (9) links to each other with the air intlet end of oxygen generation system (10), and the oxygen outlet end of oxygen generation system (10) links to each other with the oxygen inlet end of oxygen preheat device (2);
Flue gas compressor (11) smoke outlet links to each other with compression flue gas low-pressure feed heater (12) compression gas approach end; Compression flue gas low-pressure feed heater (12) compression smoke outlet links to each other with the gas approach end of gas cleaning compressibility (13).
2. the device of oxygen-enriched combusting Btu utilization as claimed in claim 1, it is characterized in that, described flue gas feed-water heater comprises flue gas high-pressure feed-water heater (4) and flue gas low-pressure feed heater (5), the gas approach end of described high-pressure feed-water heater (4) links to each other with the third part smoke outlet of described boiler (1), the smoke outlet of described flue gas high-pressure feed-water heater (4) links to each other with the gas approach end of described flue gas low-pressure feed heater (5), and the smoke outlet of low-pressure feed heater (5) links to each other with the gas approach end of flue gas condenser (18).
3. the device of oxygen-enriched combusting Btu utilization as claimed in claim 1, it is characterized in that, the feed-water inlet end of described flue gas high-pressure feed-water heater (4) is connected with for the first water pump (8) that extracts the Boiler High Pressure feedwater, and flue gas high-pressure feed-water heater (4) arranges the pump-out of first flow controller control water pump; The feed-water inlet end of described flue gas low-pressure feed heater (5) is connected with for the second water pump (15) that extracts the boiler low pressure feed water, and flue gas low-pressure feed heater (5) arranges the pump-out of second amount controller control water pump; Described compressed air low-pressure feed-water heater (9) feed-water inlet end is connected with for the 3rd water pump (16) that extracts the boiler low pressure feed water, and compressed air low-pressure feed-water heater (9) arranges the pump-out of flow controller control water pump; Described compression flue gas low-pressure feed heater (12) feed-water inlet end is connected with for the 4th water pump (17) that extracts the boiler low pressure feed water, and compression flue gas low-pressure feed heater (12) arranges the pump-out of flow controller control water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202238778U CN203258668U (en) | 2013-04-27 | 2013-04-27 | Oxygen-enriched combustion heat utilizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202238778U CN203258668U (en) | 2013-04-27 | 2013-04-27 | Oxygen-enriched combustion heat utilizing device |
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| Publication Number | Publication Date |
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| CN203258668U true CN203258668U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013202238778U Expired - Lifetime CN203258668U (en) | 2013-04-27 | 2013-04-27 | Oxygen-enriched combustion heat utilizing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234213A (en) * | 2013-04-27 | 2013-08-07 | 东南大学 | Method and device for utilizing oxygen-enriched combustion heat |
| CN106321177A (en) * | 2016-08-18 | 2017-01-11 | 东南大学 | A supercritical CO2 power generation device and method for realizing CO2 separation and capture |
-
2013
- 2013-04-27 CN CN2013202238778U patent/CN203258668U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234213A (en) * | 2013-04-27 | 2013-08-07 | 东南大学 | Method and device for utilizing oxygen-enriched combustion heat |
| CN103234213B (en) * | 2013-04-27 | 2015-10-14 | 东南大学 | A kind of method of oxygen-enriched combusting Btu utilization and device |
| CN106321177A (en) * | 2016-08-18 | 2017-01-11 | 东南大学 | A supercritical CO2 power generation device and method for realizing CO2 separation and capture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131030 Effective date of abandoning: 20151014 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20131030 Effective date of abandoning: 20151014 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |