CN110645101A - Constant-temperature air inlet device and method for synthesis gas combustion turbine for combustion - Google Patents
Constant-temperature air inlet device and method for synthesis gas combustion turbine for combustion Download PDFInfo
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- CN110645101A CN110645101A CN201911046348.3A CN201911046348A CN110645101A CN 110645101 A CN110645101 A CN 110645101A CN 201911046348 A CN201911046348 A CN 201911046348A CN 110645101 A CN110645101 A CN 110645101A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 39
- 238000003786 synthesis reaction Methods 0.000 title claims description 23
- 230000015572 biosynthetic process Effects 0.000 title claims description 22
- 238000000034 method Methods 0.000 title claims description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 106
- 239000007789 gas Substances 0.000 claims description 63
- 238000010521 absorption reaction Methods 0.000 claims description 56
- 239000003546 flue gas Substances 0.000 claims description 40
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 39
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 32
- 239000002918 waste heat Substances 0.000 claims description 32
- 239000006096 absorbing agent Substances 0.000 claims description 28
- 239000003507 refrigerant Substances 0.000 claims description 23
- 238000013021 overheating Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- IPLONMMJNGTUAI-UHFFFAOYSA-M lithium;bromide;hydrate Chemical compound [Li+].O.[Br-] IPLONMMJNGTUAI-UHFFFAOYSA-M 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- 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
- F02C7/08—Heating air supply before combustion, e.g. by exhaust gases
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- 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
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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- 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
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
- F02C7/141—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid
- F02C7/143—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid before or between the compressor stages
Abstract
When the ambient temperature is lower than 10 ℃ in winter, the constant-temperature air inlet device of the gas turbine is used for heating air entering the air compressor, so that the increase of the mass flow of the air entering the air compressor caused by the reduction of the ambient temperature can be avoided, the heat value of the synthetic gas is not required to be improved to keep the exhaust temperature of the turbine unchanged, meanwhile, the over-high low-frequency vibration of a combustion chamber can be avoided, and the overheating risk of the combustion chamber and turbine blades can be reduced; when the ambient temperature is higher than 25 ℃ in summer, part of heat of air entering the air compressor is recovered through the constant-temperature air inlet device of the gas turbine, the temperature of the air entering the air compressor is reduced, and the density of the air entering the air compressor is improved, so that the mass flow of the air entering the air compressor can be increased, and the problem of reduction of the highest load of the gas turbine in summer due to reduction of the mass flow of the air entering the air compressor is solved.
Description
Technical Field
The invention belongs to the technical field of gas turbines, and particularly relates to a constant-temperature air inlet device and method for a synthetic gas combustion turbine.
Background
The gas turbine is a device which takes continuously flowing gas as a working medium to drive turbine blades to rotate at a high speed and converts chemical energy of fuel into mechanical energy of the turbine blades. A gas turbine is generally composed of a compressor, a combustion chamber, a turbine, and a shaft connecting the compressor and the turbine, and a gas turbine for generating electricity is also equipped with an electric generator, which is also connected to the shaft connecting the compressor and the turbine. The volume flow of air at the inlet of a compressor in a general gas turbine is designed to be invariable, namely, the volume flow of air entering the compressor is also invariable under the condition that the rotating speed of the compressor is invariable. Because the air density is different under different environmental temperatures, the difference can cause the mass flow of the air at the inlet of the air compressor to change greatly. If the ambient temperature is reduced from 40 ℃ to-10 ℃, the mass flow of air entering the compressor can be increased by more than 18%. During operation of a gas turbine, the turbine outlet temperature is generally controlled to be substantially constant by limiting the air flow by adjusting the compressor Inlet Guide Vane (IGV) blade angle. For a low-calorific-value gas turbine burning synthesis gas, because the calorific value of the synthesis gas with the same mass flow is lower than that of natural gas, the mass flow of the synthesis gas required for achieving the same load is obviously higher than that of the natural gas, and if the inlet temperature of a turbine is kept unchanged, the surge margin of a gas compressor is reduced. At lower ambient temperatures, such as in winter, the mass flow of air entering the compressor is significantly increased, and if the IGV opening and the mass flow of syngas are maintained at higher ambient temperatures, such as in summer, excessive low frequency vibration of the combustor can be caused, which is detrimental to the safe and stable operation of the gas turbine, and further increasing the syngas calorific value to match the increased air is required to maintain the turbine exhaust temperature constant. However, as the calorific value of the syngas increases, the maximum temperature inside the combustor and the temperature of the flue gas entering the first stage of the turbine also increase, which has a certain negative effect on the life of the combustor and the turbine blades, and also increases the risk of failure of these components.
Disclosure of Invention
The invention aims to provide a constant-temperature air inlet device and a constant-temperature air inlet method for a synthetic gas turbine for combustion, which solve the defects in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a constant-temperature air inlet device for a synthesis gas combustion turbine, which comprises a constant-temperature air inlet device body for heating or reducing the temperature of air entering a compressor of the synthesis gas combustion turbine, wherein the constant-temperature air inlet device body is arranged between an outlet of an air filter of the synthesis gas combustion turbine and an inlet of the compressor.
Preferably, the system comprises an absorption heat pump and a heat exchanger, wherein an air channel of the heat exchanger is respectively connected with an air filter and a compressor on a synthesis gas combustion turbine for combustion; the working medium channel of the heat exchanger is connected with the working medium channel of the absorption heat pump; the absorption heat pump is provided with an inlet of low-pressure superheated steam, a low-temperature heat source inlet and a medium water inlet.
Preferably, a low-temperature heat source inlet on the absorption heat pump is connected with a flue gas heat exchanger, wherein the flue gas heat exchanger is arranged at a tail flue gas outlet of the waste heat boiler.
Preferably, the medium water inlet on the absorption heat pump is connected with a feed water heat exchanger, and the feed water heat exchanger is arranged at the feed water outlet of the feed water pump.
Preferably, the constant-temperature air inlet device body comprises an absorption heat pump, a heat exchanger, a flue gas heat exchanger and a water supply heat exchanger, wherein an air inlet of the heat exchanger is connected with an air outlet of an air filter, and an air outlet of the heat exchanger is connected with an air inlet of an air compressor; the working medium outlet and the working medium inlet of the heat exchanger are respectively connected with the working medium inlet and the working medium outlet of the absorption heat pump; the working medium outlet and the working medium inlet of the flue gas heat exchanger are connected with the working medium inlet and the working medium outlet of the absorption heat pump; a flue gas outlet and a flue gas inlet of the flue gas heat exchanger are respectively connected with a tail flue gas inlet and a tail flue gas outlet of the waste heat boiler; the medium water outlet and the medium water inlet of the water supply heat exchanger are connected with the medium water inlet and the medium water outlet of the absorption heat pump; and a feed water inlet and a feed water outlet of the feed water heat exchanger are respectively connected with a feed water outlet of the condenser and a feed water inlet of the waste heat boiler.
Preferably, the absorption heat pump comprises a generator, a condenser, an evaporator and an absorber, wherein the generator is provided with a low-pressure superheated steam inlet, and the low-pressure superheated steam inlet is connected with a low-pressure steam outlet of the waste heat boiler; a refrigerant outlet on the generator is connected with a refrigerant inlet of the condenser, a refrigerant outlet of the condenser is connected with a refrigerant inlet of the evaporator, and a low-temperature heat source inlet is arranged on the evaporator; the refrigerant outlet of the evaporator is connected with the refrigerant inlet of the absorber, the medium water inlet is arranged on the absorber, the lithium bromide dilute solution outlet on the absorber is connected with the lithium bromide dilute solution inlet of the generator, the lithium bromide concentrated solution outlet on the generator is connected with the lithium bromide concentrated solution inlet on the absorber, and the medium water outlet on the absorber is connected with the medium water inlet on the condenser.
A constant temperature air inlet control method for a synthesis gas combustion turbine is based on the constant temperature air inlet device for the synthesis gas combustion turbine, and comprises the following steps:
when the ambient temperature is lower than 10 ℃, the air entering the air compressor is heated by the constant-temperature air inlet device body, so that the temperature of the air is not lower than 10 ℃;
when the ambient temperature is higher than 25 ℃, the heat of the air entering the air compressor is recovered through the constant-temperature air inlet device body, so that the temperature of the air is not higher than 25 ℃.
Preferably, when the ambient temperature is lower than 10 ℃, the flue gas at the tail of the waste heat boiler is used for heating the working medium of the absorption heat pump, and the heated working medium enters the heat exchanger to exchange heat with the low-temperature air in the heat exchanger so as to adjust the temperature of the air entering the air compressor to be not lower than 10 ℃.
Preferably, when the ambient temperature is higher than 25 ℃, the feed water of the condenser is utilized to exchange heat with the medium water in the feed water heat exchanger, and the heated feed water enters the waste heat boiler; the cooled medium water enters an absorption heat pump and then flows through a heat exchanger to exchange heat with high-temperature air so as to adjust the temperature of the air entering the air compressor to be not higher than 25 ℃.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a constant temperature air inlet device and a method for a synthetic gas turbine for combustion, which heats air entering a gas compressor through the constant temperature air inlet device of the gas turbine to ensure that the temperature of the air is not lower than 10 ℃, can avoid the increase of the mass flow of the air entering the gas compressor caused by the reduction of the ambient temperature, thereby avoiding the increase of the heat value of the synthetic gas to keep the exhaust temperature of the turbine unchanged, simultaneously avoiding the overlarge low-frequency vibration of a combustion chamber and reducing the overheating risk of the combustion chamber and turbine blades; the constant-temperature air inlet device of the gas turbine recovers part of heat of air entering the air compressor, reduces the temperature of the air entering the air compressor to be below 25 ℃, improves the density of the air entering the air compressor, can increase the mass flow of the air entering the air compressor, avoids the problem of reduction of the highest load of the gas turbine in summer due to reduction of the mass flow of the air entering the air compressor, and can heat feed water of the waste heat boiler, improve the low-pressure steam yield of the waste heat boiler and further improve the output of a low-pressure cylinder of the steam turbine.
Drawings
FIG. 1 is a constant temperature air inlet assembly and combined gas and steam cycle system for a syngas-fired gas turbine;
FIG. 2 is a schematic diagram of an absorption heat pump flow in a constant temperature inlet for a syngas-fired gas turbine;
FIG. 3 is a diagram of the operation of a thermostatic air inlet device for a syngas-fired gas turbine in winter (ambient temperature below 10℃.);
FIG. 4 is a schematic diagram of a thermostatic air inlet device for a syngas-fired gas turbine operating in summer (ambient temperature above 25℃.);
FIG. 5 is a switching logic for a thermostatic air inlet for a syngas-fired gas turbine in different operating modes;
wherein, 1-air filter; 2, an air compressor; 3-a combustion chamber; 4-turbine; 5-a generator; 6-axis; 11-air; 12-constant temperature air; 13-compressed air; 14-synthesis gas; 15-combustion chamber exhaust; 16-turbine exhaust; 17-exhaust of the waste heat boiler; 31-a waste heat boiler; 32-a steam turbine; 33-a generator; 34-a coupling; 35-a condenser; 36-a feed pump; 41-water supply; 42-superheated steam; 43-dead steam; 44-condensed water; 51-an absorption heat pump; 52-a heat exchanger; 53-flue gas heat exchanger; 54-feedwater heat exchanger; 61-a first three-way valve; 62-a second three-way valve; 63-three third valve; 64-a fourth three-way valve; 65-a fifth three-way valve; 66-a sixth three-way valve; 71-working medium pipeline inlet; 72-working medium pipeline outlet; 73-working medium pipeline outlet; 74-working medium pipeline inlet; 79-low pressure superheated steam; 81-a generator; 82-a condenser; 83-an evaporator; 84-an absorber; 91-a refrigerant; 92-a refrigerant; 93-a refrigerant; 94-lithium bromide dilute solution; 95-lithium bromide concentrated solution; 102-a low temperature heat source; 103-water as medium.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, the present invention provides a constant temperature air inlet device for a synthesis gas combustion turbine, wherein the synthesis gas combustion turbine comprises an air filter 1, a compressor 2, a combustion chamber 3, a turbine 4, a generator 5, a shaft 6, a waste heat boiler 31, a steam turbine 32, a generator 33, a coupling 34, a condenser 35 and a water feed pump 36, wherein the air filter 1 is provided with an air inlet, an outlet of the air filter 1 is connected with an inlet of the compressor 2, a high pressure gas outlet of the compressor 2 is connected with an inlet of the combustion chamber 3, the combustion chamber 3 is provided with a synthesis gas inlet, the synthesis gas and the high pressure gas are mixed and combusted in the combustion chamber 3, an outlet of the combustion chamber 3 is connected with an inlet of the turbine 4, the high temperature and high pressure gas drives blades of the turbine 4 to rotate to do work, a tail gas outlet of the turbine 4 is connected with a flue gas inlet of the waste heat boiler, the turbine 4 is sequentially connected with the compressor 2 and the generator 5 through a shaft 6, and the rotation of the blades applies work to drive the generator 5 to generate electricity and apply work.
The high-temperature gas after combustion pushes blades of the turbine 4 to rotate, the blades are connected with the shaft 6, namely the shaft 6 rotates along with the blades, the shaft 6 is connected with the compressor 2, the blades of the compressor 2 are also connected with the shaft 6, therefore, the synchronous rotation of the compressor 2 and the turbine 6 can be kept, the gas of the turbine 6 expands to output work, the gas of the compressor 2 compresses to consume work, and the difference between the work and the work is output as electric energy through the generator 5 which is also connected with the shaft 6.
The superheated steam outlet of the waste heat boiler 31 is connected with the inlet of the steam turbine 32, the steam turbine 32 drives the blades to do work by utilizing the superheated steam, and the exhaust steam outlet of the steam turbine 32 is connected with the condenser 35.
The steam turbine 32 is connected to a generator 33 through a coupling 34, and drives the generator 33 to generate electricity.
The condensed water outlet of the condenser 35 is connected to a feed water pump 36, and the condensed water is pressurized and fed to the feed water inlet of the exhaust-heat boiler 31 by the feed water pump 36.
The constant temperature air inlet device comprises an absorption heat pump 51, a heat exchanger 52, a flue gas heat exchanger 53, a water supply heat exchanger 54, a first three-way valve 61, a second three-way valve 62, a third three-way valve 63, a fourth three-way valve 64, a fifth three-way valve 65 and a sixth three-way valve 66, wherein the heat exchanger 52 is arranged between the air filter 1 and the compressor 2; the flue gas heat exchanger 53 is arranged at the tail gas outlet of the waste heat boiler 31; the feedwater heat exchanger 54 is arranged between the feedwater pump 36 and the waste heat boiler 31.
The heat exchanger 52, the flue gas heat exchanger 53 and the water supply heat exchanger 54 are all connected with an absorption heat pump 51 which takes lithium bromide-water solution as working medium.
Specifically, the method comprises the following steps: an air inlet of the heat exchanger 52 is connected with an air outlet of the air filter 1, an air outlet of the heat exchanger 52 is connected with an air inlet of the air compressor 2, a working medium outlet of the heat exchanger 52 is connected with a working medium inlet or a medium water inlet of the absorption heat pump 51, a working medium inlet of the heat exchanger 52 is connected with a working medium outlet or a medium water outlet of the absorption heat pump 51, and air is heated or cooled by the working medium so as to keep the temperature of the air entering the air compressor 2 basically constant.
The working medium outlet of the heat exchanger 52 is connected with the working medium inlet or the medium water inlet of the absorption heat pump 51 through a sixth three-way valve 66.
The working medium inlet of the heat exchanger 52 is connected with the working medium outlet or the medium water outlet of the absorption heat pump 51 through a fifth three-way valve 65.
A working medium inlet of the flue gas heat exchanger 53 is connected with a working medium outlet 72 of the absorption heat pump 51; the working medium outlet of the flue gas heat exchanger 53 is connected with the working medium inlet 71 of the absorption heat pump 51.
A second three-way valve 62 is arranged between the working medium inlet of the flue gas heat exchanger 53 and the working medium outlet 72 of the absorption heat pump 51.
A first three-way valve 61 is arranged between the working medium outlet of the flue gas heat exchanger 53 and the working medium inlet 71 of the absorption heat pump 51.
The free ends of the first three-way valve 61 and the second three-way valve 62 are respectively connected with the working medium inlet and the working medium outlet of the absorption heat pump 51.
The heat exchanger 53 works only in winter, the tail flue gas of the waste heat boiler 31 is used for heating working medium to serve as a low-temperature heat source 102 of the absorption heat pump 51, and the tail flue gas of the waste heat boiler 31 is cooled through a flue gas channel and then is discharged.
A medium water inlet of the feed water heat exchanger 54 is connected with a medium water outlet 73 of the absorption heat pump 51;
the medium water outlet of the feed water heat exchanger 54 is connected to the medium water inlet 74 of the absorption heat pump 51.
A third three-way valve 63 is provided between the medium water inlet of the feedwater heat exchanger 54 and the medium water outlet 73 of the absorption heat pump 51.
A fourth three-way valve 64 is provided between the medium water outlet of the feedwater heat exchanger 54 and the medium water inlet 74 of the absorption heat pump 51.
The free ends of the third three-way valve 63 and the fourth three-way valve 64 are connected to the inlet and outlet of the medium water of the absorption heat pump 51, respectively.
Among them, the feed water heat exchanger 54, which heats the feed water in the waste heat boiler 31 using the medium water in the absorption heat pump 51, operates only in summer.
The absorption heat pump 51 comprises a generator 81, a condenser 82, an evaporator 83 and an absorber 84, wherein the generator 81 is provided with a low-pressure superheated steam inlet which is connected with a low-pressure steam outlet of the waste heat boiler 31; a refrigerant outlet on the generator 81 is connected with a refrigerant inlet of the condenser 82, a refrigerant outlet of the condenser 82 is connected with a refrigerant inlet of the evaporator 83, a low-temperature heat source inlet is arranged on the evaporator 83, a refrigerant outlet of the evaporator 83 is connected with a refrigerant inlet of the absorber 84, a medium water inlet is arranged on the absorber 84, a lithium bromide dilute solution outlet on the absorber 84 is connected with a lithium bromide dilute solution inlet of the generator 81, a lithium bromide concentrated solution outlet on the generator 81 is connected with a lithium bromide concentrated solution inlet on the absorber 84, and a medium water outlet on the absorber 84 is connected with a medium water inlet on the condenser 82.
The absorption heat pump 51 heats the generator 81 with the low-pressure superheated steam 79 of not more than 0.5MPa to generate the refrigerant 91, and the lithium bromide-water solution becomes a lithium bromide concentrated solution 95 and enters the absorber 84. The refrigerant 91 is condensed by the condenser 82 and throttled again, enters the evaporator 83, is evaporated by heat provided by the low-temperature heat source 102, finally enters the absorber 84, and becomes a lithium bromide dilute solution 94 by diluting the lithium bromide concentrated solution 95, and returns to the generator 81. The intermediate water absorbs heat in the absorber 84 and the condenser 82, respectively, for providing heat to other processes to complete the cycle.
When the ambient temperature is lower than 10 ℃, the low-temperature heat source 102 of the absorption heat pump 51 is working medium water which is from the heat exchanger 53 and is heated by the tail flue gas of the waste heat boiler 31, and the highest temperature of the working medium water is not more than 70 ℃; when the ambient temperature is higher than 25 ℃, the low-temperature heat source 102 of the absorption heat pump 51 is working medium water heated by air from the heat exchanger 52, and the lowest temperature is not lower than 50 ℃. The medium water 103 enters the absorption heat pump 51 from the absorber 84, and circulates out of the absorption heat pump 51 after absorbing heat through the absorber 84 and the condenser 82. When the ambient temperature is lower than 10 ℃, the heated medium water 103 enters the heat exchanger 52 to heat the air, so that the temperature is not lower than 10 ℃; when the ambient temperature is higher than 25 ℃, the heated medium water 103 enters the heat exchanger 54 to heat the waste heat boiler feed water 41, the feed water temperature can be increased to be not higher than 10 ℃, and meanwhile, the air temperature at the outlet of the air compressor 2 can be reduced to be lower than 25 ℃.
In winter, when the ambient temperature is lower than 10 ℃, the working mode of the constant-temperature air inlet device of the gas turbine is shown in fig. 3, working medium water is heated by the tail flue gas of the waste heat boiler 31 in the flue gas heat exchanger 53, is used as a low-temperature heat source 102 of the evaporator 83 of the absorption heat pump 51, and returns to the flue gas heat exchanger 53 after being cooled to complete circulation.
The medium water enters the heat exchanger 52 after absorbing heat in the absorber 84 and the condenser 82 respectively, and then heats the air entering the heat exchanger 52 to adjust the temperature of the air entering the compressor 2 to be not lower than 10 ℃, and finally returns to the absorber 84 to finish circulation.
In summer, when the ambient temperature is higher than 25 ℃, the working mode of the constant-temperature air inlet device of the gas turbine is shown in fig. 4, working medium water is heated by air entering the air compressor 2 in the heat exchanger 52, so that the temperature of the air entering the air compressor 2 can be regulated to be not higher than 25 ℃, the heated working medium water is used as a low-temperature heat source 102 of the evaporator 83, and the working medium water returns to the heat exchanger 52 after being cooled to complete circulation.
The medium water enters the feed water heat exchanger 54 to heat the feed water entering the waste heat boiler 31 after absorbing heat in the absorber 84 and the condenser 82 respectively, and is recycled to the absorber 84 to complete circulation.
The working process is as follows:
When the ambient temperature is lower than 10 ℃, the first three-way valve 61 is switched to a working medium inlet 71 channel of the absorption heat pump 51, the second three-way valve 62 is switched to a working medium outlet 72 channel of the absorption heat pump 51, the third three-way valve 63 is switched to a fifth three-way valve 65 channel, the fourth three-way valve 64 is switched to a sixth three-way valve 66 channel, the fifth three-way valve 65 is switched to the third three-way valve 63 channel, the sixth three-way valve 66 is switched to the fourth three-way valve 64 channel, the absorption heat pump 51, the heat exchanger 52 and the flue gas heat exchanger 53 are put into the water supply heat exchanger 54; when the ambient temperature is higher than 25 ℃, the first three-way valve 61 is switched to a channel of a sixth three-way valve 66, the second three-way valve 62 is switched to a channel of a fifth three-way valve 65, the third three-way valve 63 is switched to a channel 73, the fourth three-way valve 64 is switched to a channel 74, the fifth three-way valve 65 is switched to a channel of the second three-way valve 62, the sixth three-way valve 66 is switched to a channel of the first three-way valve 61, the absorption heat pump 51, the heat exchanger 52 and the feed water heat exchanger 54 are put into the system, and; when the ambient temperature is between 10 ℃ and 25 ℃, all the three-way valves 61-66 are closed, and the absorption heat pump 51 and the heat exchangers 52-54 are not in operation.
Compared with the prior art, the invention has the beneficial effects that: when the environmental temperature is lower than 10 ℃ in winter, the air entering the air compressor is heated by the constant-temperature air inlet device of the gas turbine to ensure that the temperature is not lower than 10 ℃, so that the increase of the mass flow of the air entering the air compressor caused by the reduction of the environmental temperature can be avoided, the heat value of the synthesis gas is not required to be improved to keep the exhaust temperature of the turbine unchanged, and meanwhile, the excessive low-frequency vibration of a combustion chamber can be avoided, and the overheating risk of the combustion chamber and turbine blades can be reduced; when the environmental temperature is higher than 25 ℃ in summer, partial heat of air entering the air compressor is recovered through the constant-temperature air inlet device of the gas turbine, the temperature of the air entering the air compressor is reduced to be lower than 25 ℃, the density of the air entering the air compressor is improved, the mass flow of the air entering the air compressor can be increased, the problem that the highest load of the gas turbine in summer is reduced due to the fact that the mass flow of the air entering the air compressor is reduced is solved, meanwhile, the recovered heat can heat the feed water of the waste heat boiler, the low-pressure steam yield of the waste heat boiler is improved, and further the output of a low-pressure cylinder.
Claims (9)
1. A thermostatic air inlet device for a syngas turbine, characterized by comprising a thermostatic air inlet device body for heating or reducing the temperature of air entering a compressor of the syngas turbine, said thermostatic air inlet device body being arranged between an outlet of an air filter (1) of the syngas turbine and an inlet of the compressor (2).
2. A constant temperature air inlet device for a synthesis gas combustion turbine is characterized by comprising an absorption heat pump (51) and a heat exchanger (52), wherein an air channel of the heat exchanger (52) is respectively connected with an air filter (1) and a compressor (2) on the synthesis gas combustion turbine; the working medium channel of the heat exchanger (52) is connected with the working medium channel of the absorption heat pump (51); the absorption heat pump (51) is provided with an inlet of low-pressure superheated steam, a low-temperature heat source inlet and a medium water inlet.
3. The constant temperature air inlet device for the synthesis gas combustion turbine is characterized in that a flue gas heat exchanger (53) is connected to a low temperature heat source inlet of the absorption heat pump (51), wherein the flue gas heat exchanger (53) is arranged at a tail flue gas outlet of the waste heat boiler (31).
4. The constant temperature air intake apparatus for a syngas-fired gas turbine as claimed in claim 3, characterized in that the medium water inlet of the absorption heat pump (51) is connected with a feed water heat exchanger (54), the feed water heat exchanger (54) being arranged at the feed water outlet of the feed water pump (36).
5. The constant temperature air inlet device for the synthesis gas combustion turbine is characterized in that the constant temperature air inlet device body comprises an absorption heat pump (51), a heat exchanger (52), a flue gas heat exchanger (53) and a water supply heat exchanger (54), wherein an air inlet of the heat exchanger (52) is connected with an air outlet of an air filter (1), and an air outlet of the heat exchanger (52) is connected with an air inlet of a compressor (2); the working medium outlet and the working medium inlet of the heat exchanger (52) are respectively connected with the working medium inlet and the working medium outlet of the absorption heat pump (51); the working medium outlet and the working medium inlet of the flue gas heat exchanger (53) are connected with the working medium inlet and the working medium outlet of the absorption heat pump (51); a flue gas outlet and a flue gas inlet of the flue gas heat exchanger (53) are respectively connected with a tail flue gas inlet and a tail flue gas outlet of the waste heat boiler; a medium water outlet and a medium water inlet of the water supply heat exchanger (54) are connected with a medium water inlet and a medium water outlet of the absorption heat pump (51); and a feed water inlet and a feed water outlet of the feed water heat exchanger (54) are respectively connected with a feed water outlet of the condenser and a feed water inlet of the waste heat boiler.
6. The constant temperature air intake device for a syngas-fired gas turbine as claimed in any one of claims 2-5, wherein the absorption heat pump (51) comprises a generator (81), a condenser (82), an evaporator (83) and an absorber (84), the generator (81) is provided with a low pressure superheated steam inlet, the low pressure superheated steam inlet is connected with a low pressure steam outlet of the waste heat boiler (31); a refrigerant outlet of the generator (81) is connected with a refrigerant inlet of the condenser (82), a refrigerant outlet of the condenser (82) is connected with a refrigerant inlet of the evaporator (83), and a low-temperature heat source inlet is arranged on the evaporator (83); a refrigerant outlet of the evaporator (83) is connected with a refrigerant inlet of the absorber (84), a medium water inlet is formed in the absorber (84), a lithium bromide dilute solution outlet on the absorber (84) is connected with a lithium bromide dilute solution inlet of the generator (81), a lithium bromide concentrated solution outlet on the generator (81) is connected with a lithium bromide concentrated solution inlet on the absorber (84), and a medium water outlet on the absorber (84) is connected with a medium water inlet on the condenser (82).
7. A constant temperature intake control method for a syngas combustion turbine, characterized in that a constant temperature intake apparatus for a syngas combustion turbine according to any of claims 1-6 comprises the steps of:
when the ambient temperature is lower than 10 ℃, the air entering the air compressor is heated by the constant-temperature air inlet device body, so that the temperature of the air is not lower than 10 ℃;
when the ambient temperature is higher than 25 ℃, the heat of the air entering the air compressor is recovered through the constant-temperature air inlet device body, so that the temperature of the air is not higher than 25 ℃.
8. The constant temperature air intake control method for the synthesis gas-fired gas turbine according to claim 7, characterized in that when the ambient temperature is lower than 10 ℃, the exhaust-heat boiler tail flue gas is used to heat the working medium of the absorption heat pump (51), and the heated working medium enters the heat exchanger (52) to exchange heat with the low temperature air in the heat exchanger (52) so as to adjust the temperature of the air entering the compressor (2) to be not lower than 10 ℃.
9. The constant temperature intake control method for a syngas-fired gas turbine as claimed in claim 7, wherein when the ambient temperature is higher than 25 ℃, the feed water of the condenser is utilized to exchange heat with the medium water in the feed water heat exchanger (54), and the heated feed water enters the exhaust heat boiler; the cooled medium water enters an absorption heat pump (51) and then flows through a heat exchanger (52) to exchange heat with high-temperature air so as to adjust the temperature of the air entering the air compressor (2) to be not higher than 25 ℃.
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