CN103670712B - A kind of gas turbine generating system - Google Patents
A kind of gas turbine generating system Download PDFInfo
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- CN103670712B CN103670712B CN201310686873.8A CN201310686873A CN103670712B CN 103670712 B CN103670712 B CN 103670712B CN 201310686873 A CN201310686873 A CN 201310686873A CN 103670712 B CN103670712 B CN 103670712B
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Abstract
The invention provides a kind of gas turbine generating system using fuel gas with low heat value, including: gas turbine, heat recovery system and a series of pipeline, wherein, described gas turbine includes low-pressure compressor, high-pressure compressor, combustor, high pressure turbine, low pressure turbine and power turbine composition, and described heat recovery system includes the first regenerator, the second regenerator and middle cold heat exchanger；Described middle cold heat exchanger is connected with low-pressure compressor, high-pressure compressor respectively by pipeline, second regenerator is connected with high-pressure compressor, combustor respectively by pipeline, being connected in turn by pipeline between combustor, high pressure turbine, low pressure turbine and power turbine, the first regenerator is connected with power turbine, the second regenerator respectively by pipeline.The present invention can use the fuel gas with low heat value of 1.0 2.0MJ/kg, beneficially heat energy and make full use of, and reduces pollutant emission.
Description
Technical field
The invention belongs to mechanical field, particularly to a kind of gas turbine generating system.
Background technology
Often having substantial amounts of low-BTU gas to produce in coal and petrochemical industry project, its composition is substantial amounts of nitrogen, carbon dioxide, the water vapour minimal amount of fuel gas of mixing, such as methane, carbon monoxide and hydrogen etc., is the most often mixed with the toxic and harmfuls such as hydrogen sulfide.If directly discharged by these low-BTU gas, then can affect surrounding safety, using the forms such as torch burnings to do harmless treatment the most more, but wasting substantial amounts of heat energy, causing resource and energy waste.
The low-BTU gas of general 1.0-2.0MJ/kg, is difficult to light in the case of room temperature, is not easily formed stable combustion process.Particularly in its oxidizing fire course of reaction, air mass flow is much smaller than gas flow, and this is and one dramatically different place of common exotic fuels combustion process.
The thermal ignition of low calorie fuels and steady combustion, typically must coordinate certain heat recovery as the warm of reactant, to improve combustion reaction temperature, make burning carry out rapid and thorough.
Gas turbine is the compact high efficient turbomachinery that heat energy is directly translated into mechanical energy.General gas turbine is to be compressed by combustion air, then sprays into exotic fuels combustion heat release in combustor, promotes turbine acting.
It is not suitable with the feature that in low calorie fuels burning, combustion air flow is little based on the gas turbine process of compression combustion air.General gas turbine exhaust gas temperature is higher, if using air-breathing, flue gas can be caused to take away sensible heat relatively big, being also not reaching to the requirement of limit recovery waste heat.
Summary of the invention
Based on above-mentioned technical problem present in prior art.It is an object of the invention to propose a kind of gas turbine generating system, combustion engine whole efficiency can be improved.
The invention provides a kind of gas turbine generating system, including: gas turbine, heat recovery system and a series of pipeline, wherein, described gas turbine includes low-pressure compressor, high-pressure compressor, combustor, high pressure turbine, low pressure turbine and power turbine composition, and described heat recovery system includes the first regenerator, the second regenerator and middle cold heat exchanger；Described middle cold heat exchanger is connected with low-pressure compressor, high-pressure compressor respectively by pipeline, second regenerator is connected with high-pressure compressor, combustor respectively by pipeline, being connected in turn by pipeline between combustor, high pressure turbine, low pressure turbine and power turbine, the first regenerator is connected with power turbine, the second regenerator respectively by pipeline.
Further, gas turbine generating system, also include: the low calorie fuels supplied by pipeline sequentially passes through low-pressure compressor, middle cold heat exchanger and high-pressure compressor, it is compressed to 800-1000kPa and 300 DEG C, low calorie fuels after compression intensification is through the second regenerator, it is preheating to 550 DEG C by high-temperature flue gas, then exhaust gas temperature is cooled to 300 DEG C；The most oxygen-enriched or pure oxygen combustion-supporting gas is preheating to 600 DEG C through the first regenerator, and low calorie fuels and combustion-supporting gas after preheating enter combustor and carry out oxidizing fire reaction；After combustion chamber high temperature smoke evacuation sequentially passes through high pressure turbine, low pressure turbine and power turbine, drive high pressure mechanism of qi and low-pressure compressor to rotate, outwards export shaft work simultaneously, drive generator operation.
Further, the flue-gas temperature that the power turbine of gas turbine generating system is discharged is 600 DEG C, after sequentially passing through the first regenerator and the second regenerator, is reduced to 300 DEG C, for preboiler or the thermal source of absorption refrigeration unit..
Further, the low-temperature receiver of the middle cold heat exchanger of gas turbine generating system specially cools down water, air cooling or absorption refrigeration unit low-temperature receiver.
Further, exotic material loose structure is set, for stably burning in the combustor of gas turbine generating system.
The gas turbine generating system of the present invention has the effect that and makes full use of low calorie fuels heat energy, and efficiency is high, remarkable in economical benefits；According to low calorie fuels combustion reaction feature, carry out sufficient reheat operation, improve low calorie fuels and combustion-supporting gas preheating temperature, it is achieved stable thermal ignition and combustion process；According to low calorie fuels combustion reaction feature, use compress fuel gas mode and in cold backheat, improve Gas Turbine Output and efficiency；According to low calorie fuels combustion reaction feature, use oxygen-enriched or pure oxygen as combustion-supporting gas, improve in combustor oxygen concentration in mixed gas, reduce flue gas flow, and then reduce system smoke evacuation heat dissipation capacity, improve system effectiveness；According to low calorie fuels combustion reaction feature, the extraction cycle of low calorie fuels is preheated after using first preheated-combustion-supporting gas, make combustion-supporting gas and the furnace inlet temperature the most more consistent while of can being preheating to higher of fuel, reach the abundant effect reclaiming preheating, also make to be impacted by bigger cold airflow at entry of combustion chamber igniting, contribute to stable ignition and burning；Exhaust gas temperature is relatively low, it is achieved that heat energy makes full use of.Increase the exotic material loose structure of swept area according to configuration in low calorie fuels combustion reaction feature, combustor, reach steady fuel efficiency fruit.
Accompanying drawing explanation
Fig. 1 is a kind of gas turbine generating system structural representation of the present invention.
In figure, 1, low-pressure compressor, 2, high-pressure compressor, 3, combustor, 4, high pressure turbine, 5, low pressure turbine, 6, power turbine, 7, regenerator, 8, regenerator, 9, middle cold heat exchanger, 10, low calorie fuels, 11, flue gas, 12, oxygen-enriched or pure oxygen combustion-supporting gas.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings, it is noted that described embodiment is intended merely to facilitate the understanding of the present invention, and it does not play any restriction effect.
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
As shown in Figure 1, the invention provides a kind of gas turbine generating system, this gas turbine generating system uses low calorie fuels, including: use the gas turbine of low calorie fuels, heat recovery system and respective line, wherein, gas turbine includes low-pressure compressor 1, high-pressure compressor 2, combustor 3, high pressure turbine 4, low pressure turbine 5 and power turbine 6 and forms.Heat recovery system includes regenerator 7, regenerator 8 and middle cold heat exchanger 9.Middle cold heat exchanger 9 is connected with low-pressure compressor 1, high-pressure compressor 2 respectively by pipeline, regenerator 8 is connected with high-pressure compressor 2, combustor 3 respectively by pipeline, it is connected in turn by pipeline between combustor 3, high pressure turbine 4, low pressure turbine 5 and power turbine 6, additionally, regenerator 7 respectively and is linked together between power turbine 6, regenerator 8 by pipeline, and regenerator 7 receives oxygen-enriched or pure oxygen combustion-supporting gas 12 by pipeline.The workflow of concrete gas turbine generating system is as follows:
The low calorie fuels supplied by pipeline sequentially passes through low-pressure compressor 1, middle cold heat exchanger 9 and high-pressure compressor 2, is compressed to 800-1000kPa and about 300 DEG C, and in employing here, cold heat exchanger 9 can reduce the power consumption of high-pressure compressor 2.
Low calorie fuels after compression intensification, through regenerator 8, is preheating to about 550 DEG C by high-temperature flue gas, then exhaust gas temperature is cooled to about 300 DEG C.
The most oxygen-enriched or pure oxygen combustion-supporting gas is through regenerator 7, it is preheating to about 600 DEG C, simultaneously, because combustion-supporting gas amount is smaller, particularly in the case of using pure oxygen, it is only about the 5% of volumetric fuel flow rate so that smoke evacuation temperature fall in regenerator 7 is little, and fume side outlet temperature can maintain more than 550 DEG C.
Low calorie fuels and combustion-supporting gas after preheating enter combustor 3 and carry out oxidizing fire reaction.Because the flame propagation velocity of low calorie fuels is relatively low, combustion reaction is carried out with the form of a kind of dispersed combustion, need not traditional eddy current flameholder, the exotic material loose structure increasing swept area can be added in combustor 3, to obtain the most steady fuel efficiency fruit.
After combustor 3 high-temperature smoke discharging sequentially passes through high pressure turbine 4, low pressure turbine 5 and power turbine 6, drive high pressure mechanism of qi 2 and low-pressure compressor 1 to rotate, outwards export shaft work simultaneously, drive the equipment operations such as electromotor.
The flue-gas temperature that power turbine 6 is discharged is about 600 DEG C, after sequentially passing through regenerator 7 and regenerator 8, is reduced to about 300 DEG C, can be as preboiler or the thermal source of absorption refrigeration unit.
The low-temperature receiver of middle cold heat exchanger 9 can use cooling water, air cooling or absorption refrigeration unit low-temperature receiver.
The gas turbine generating system of the present invention has the effect that and makes full use of low calorie fuels heat energy, and efficiency is high, remarkable in economical benefits；According to low calorie fuels combustion reaction feature, carry out sufficient reheat operation, improve low calorie fuels and combustion-supporting gas preheating temperature, it is achieved stable thermal ignition and combustion process；According to low calorie fuels combustion reaction feature, use compress fuel gas mode and in cold backheat, improve Gas Turbine Output and efficiency；According to low calorie fuels combustion reaction feature, use oxygen-enriched or pure oxygen as combustion-supporting gas, improve in combustor oxygen concentration in mixed gas, reduce flue gas flow, and then reduce system smoke evacuation heat dissipation capacity, improve system effectiveness；According to low calorie fuels combustion reaction feature, the extraction cycle of low calorie fuels is preheated after using first preheated-combustion-supporting gas, make combustion-supporting gas and the furnace inlet temperature the most more consistent while of can being preheating to higher of fuel, reach the abundant effect reclaiming preheating, also make to be impacted by bigger cold airflow at entry of combustion chamber igniting, contribute to stable ignition and burning；Exhaust gas temperature is relatively low, it is achieved that heat energy makes full use of.Increase the exotic material loose structure of swept area according to configuration in low calorie fuels combustion reaction feature, combustor, reach steady fuel efficiency fruit.
Being described above is only the specific embodiment of the present invention, it is clear that under technical scheme instructs, anyone amendment made or the local of this area is replaced, and belongs to the scope that claims of the present invention limits.
Claims (2)
1. a gas turbine generating system, including: gas turbine, heat recovery system and a series of pipeline,
It is characterized in that: described gas turbine include low-pressure compressor, high-pressure compressor, combustor, high pressure turbine,
Low pressure turbine and power turbine composition, described heat recovery system include the first regenerator, the second regenerator and in cold
Heat exchanger；Described middle cold heat exchanger is connected with low-pressure compressor, high-pressure compressor respectively by pipeline, and second
Regenerator is connected with high-pressure compressor, combustor respectively by pipeline, and combustor, high pressure turbine, low pressure are saturating
Being connected in turn by pipeline between gentle power turbine, the first regenerator is saturating with power respectively by pipeline
Flat, the second regenerator is connected；
The low calorie fuels supplied by pipeline sequentially passes through low-pressure compressor, middle cold heat exchanger and high-pressure compressor,
Be compressed to 800-1000kPa and 300 DEG C, compression heat up after low calorie fuels through the second regenerator, quilt
High-temperature flue gas is preheating to 550 DEG C, then exhaust gas temperature is cooled to 300 DEG C；The most oxygen-enriched or pure oxygen combustion-supporting gas
Body is preheating to 600 DEG C through the first regenerator, and low calorie fuels and combustion-supporting gas after preheating enter combustor
Carry out oxidizing fire reaction；After combustion chamber high temperature smoke evacuation sequentially passes through high pressure turbine, low pressure turbine and power turbine,
Drive high pressure mechanism of qi and low-pressure compressor to rotate, outwards export shaft work simultaneously, drive generator operation；
The flue-gas temperature that described power turbine is discharged is 600 DEG C, sequentially passes through the first regenerator and the second regenerator
Afterwards, it is reduced to 300 DEG C, for preboiler or the thermal source of absorption refrigeration unit；In described combustor
Exotic material loose structure is set, for stably burning.
2. gas turbine generating system as claimed in claim 1, it is characterised in that described middle cold heat exchanger
Low-temperature receiver specially cool down water, air cooling or absorption refrigeration unit low-temperature receiver.
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| CN201310686873.8A CN103670712B (en) | 2013-12-13 | 2013-12-13 | A kind of gas turbine generating system |
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| CN201310686873.8A CN103670712B (en) | 2013-12-13 | 2013-12-13 | A kind of gas turbine generating system |
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| CN103670712A CN103670712A (en) | 2014-03-26 |
| CN103670712B true CN103670712B (en) | 2017-01-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110631050B (en) * | 2019-10-29 | 2023-06-02 | 中国华能集团有限公司 | Mixed heating system and method for synthetic gas fuel of gas turbine of IGCC power station |
| CN116771505A (en) * | 2021-12-23 | 2023-09-19 | 中印恒盛(北京)贸易有限公司 | Woody biomass micro gas turbine and operation control method thereof |
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| US6313544B1 (en) * | 1997-09-19 | 2001-11-06 | Solo Energy Corporation | Self-contained energy center for producing mechanical, electrical, and heat energy |
| CN101806247A (en) * | 2009-02-11 | 2010-08-18 | 通用电气公司 | Optimize the combined cycle power plant that uses low BTU fuel by the performance heating |
| CN102817714A (en) * | 2012-09-03 | 2012-12-12 | 中国船舶重工集团公司第七○三研究所 | Combustion gas turbine circulating device with intermediate water spray cooling and steam reinjection |
| CN102900532A (en) * | 2012-10-23 | 2013-01-30 | 中国船舶重工集团公司第七�三研究所 | Intermittent-cold back-heat main pipe type split compressor gas turbine unit |
| CN203717127U (en) * | 2013-12-13 | 2014-07-16 | 中国大唐集团科学技术研究院有限公司 | Gas turbine generation system |
-
2013
- 2013-12-13 CN CN201310686873.8A patent/CN103670712B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6313544B1 (en) * | 1997-09-19 | 2001-11-06 | Solo Energy Corporation | Self-contained energy center for producing mechanical, electrical, and heat energy |
| CN101806247A (en) * | 2009-02-11 | 2010-08-18 | 通用电气公司 | Optimize the combined cycle power plant that uses low BTU fuel by the performance heating |
| CN102817714A (en) * | 2012-09-03 | 2012-12-12 | 中国船舶重工集团公司第七○三研究所 | Combustion gas turbine circulating device with intermediate water spray cooling and steam reinjection |
| CN102900532A (en) * | 2012-10-23 | 2013-01-30 | 中国船舶重工集团公司第七�三研究所 | Intermittent-cold back-heat main pipe type split compressor gas turbine unit |
| CN203717127U (en) * | 2013-12-13 | 2014-07-16 | 中国大唐集团科学技术研究院有限公司 | Gas turbine generation system |
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