CN114837818A - Gas turbine system and power generation system - Google Patents
Gas turbine system and power generation system Download PDFInfo
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- CN114837818A CN114837818A CN202210405543.6A CN202210405543A CN114837818A CN 114837818 A CN114837818 A CN 114837818A CN 202210405543 A CN202210405543 A CN 202210405543A CN 114837818 A CN114837818 A CN 114837818A
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- 238000010248 power generation Methods 0.000 title claims abstract description 46
- 239000007789 gas Substances 0.000 claims abstract description 147
- 238000005485 electric heating Methods 0.000 claims abstract description 52
- 238000010521 absorption reaction Methods 0.000 claims abstract description 48
- 239000000446 fuel Substances 0.000 claims abstract description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003546 flue gas Substances 0.000 claims abstract description 15
- 239000002918 waste heat Substances 0.000 claims description 30
- 238000004146 energy storage Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000000779 smoke Substances 0.000 claims description 2
- 239000000567 combustion gas Substances 0.000 abstract description 3
- 239000002737 fuel gas Substances 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 8
- 238000007599 discharging Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F02C7/22—Fuel supply systems
- F02C7/224—Heating fuel before feeding to the burner
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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
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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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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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- 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 invention discloses a gas turbine system and a power generation system, wherein the gas turbine system comprises: the system comprises a renewable energy power generation device, an electric heating device, a gas preheating device, a gas turbine, a first pipeline, a second pipeline and a third pipeline, wherein the electric heating device is electrically connected with the renewable energy power generation device and is provided with a first medium inlet and a first medium outlet; the gas preheating device is provided with a first heat absorption side inlet, a first heat absorption side outlet, a first heat release side inlet and a first heat release side outlet; the first end of the first pipeline is connected with the first medium outlet, and the second end of the first pipeline is connected with the first heat release side inlet; the first end of the second pipeline is connected with the first heat release side outlet, and the second end of the second pipeline is connected with the first medium inlet; the gas turbine comprises a fuel inlet and a flue gas outlet; the first end of the third pipeline is connected with the first heat absorption side outlet, and the second end of the third pipeline is connected with the fuel inlet. The gas turbine system of the present invention has low cost for preheating the combustion gas.
Description
Technical Field
The invention relates to the technical field of gas turbines, in particular to a gas turbine system and a power generation system.
Background
A gas turbine is a device that converts the energy of a fuel into useful work. In the related art, the heat generated after the combustion of the fuel of the gas turbine is utilized to preheat the pre-burning fuel, so that the heat efficiency of the gas turbine is improved. However, the heat of the preheated fuel gas is derived from a part of the heat energy generated by burning the fuel in the gas turbine, that is, the heat of the heated fuel gas is derived from a part of the expensive fuel, and therefore the cost of the preheated fuel gas is high.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
To this end, embodiments of the present invention propose a gas turbine system that is low cost to preheat the combustion gases.
Embodiments of the present invention also provide a power generation system including the gas turbine system of the above-described embodiments.
A gas turbine system of an embodiment of the present invention includes: a renewable energy power generation device; an electrical heating device electrically connected to the renewable energy power generation device, the electrical heating device having a first medium inlet and a first medium outlet; the gas preheating device is provided with a first heat absorption side inlet, a first heat absorption side outlet, a first heat release side inlet and a first heat release side outlet; a first pipeline, wherein a first end of the first pipeline is connected with the first medium outlet, and a second end of the first pipeline is connected with the first heat release side inlet; a first end of the second pipeline is connected with the first heat release side outlet, and a second end of the second pipeline is connected with the first medium inlet; a gas turbine comprising a fuel inlet and a flue gas outlet; and a first end of the third pipeline is connected with the first heat absorption side outlet, and a second end of the third pipeline is connected with the fuel inlet.
The gas turbine system provided by the embodiment of the invention utilizes the renewable energy power generation device to supply power to the electric heating device, so that the electric heating device heats the medium, and then preheats the gas through the heated medium, so that the electric energy generated by the renewable energy replaces the heat energy generated by the combustion of the gas in the gas turbine to preheat the gas, and the cost for preheating the gas is reduced.
Therefore, the gas turbine system of the embodiment of the invention has low cost for preheating the fuel gas.
In some embodiments, the gas turbine system further comprises: the waste heat utilization device is provided with a second heat absorption side inlet, a second heat absorption side outlet, a second heat release side inlet and a second heat release side outlet, and the second end of the first pipeline is connected with the second heat absorption side inlet; a first end of the fourth pipeline is connected with the second heat absorption side outlet, and a second end of the fourth pipeline is connected with the first heat release side inlet; and the first end of the fifth pipeline is connected with the smoke outlet, and the second end of the fifth pipeline is connected with the second heat release side inlet.
In some embodiments, the gas turbine system further comprises: a sixth pipeline, a first end of the sixth pipeline being connected to the second end of the first pipeline, a second end of the sixth pipeline being connected to the second heat absorption side inlet; a seventh pipeline, a first end of the seventh pipeline being connected to the first end of the fourth pipeline, a second end of the seventh pipeline being connected to the second heat absorption side outlet; a bypass line, a first end of the bypass line connected to the second end of the first line, a second end of the bypass line connected to the first end of the fourth pipe; the first switch valve is arranged on the bypass pipeline; a second switching valve provided on one of the sixth pipeline and the seventh pipeline.
In some embodiments, the gas turbine system further comprises: a third on-off valve provided on the other of the sixth line and the seventh line.
In some embodiments, the gas turbine system further comprises: a first end of the eighth pipeline is connected with the second pipeline, and a second end of the eighth pipeline is connected with the bypass pipeline; a ninth pipe, a first end of the ninth pipe being connected to the second end of the second pipe, a second end of the ninth pipe being connected to the first medium inlet; the fourth switching valve is arranged on the eighth pipeline; a fifth switching valve provided on one of the first and ninth lines; the first switch valve is located between the second end of the bypass line and a junction of the eighth line and the bypass line.
In some embodiments, the gas turbine system further comprises: a sixth switching valve provided on the other of the first line and the ninth line.
In some embodiments, the gas turbine system further comprises: the renewable energy power generation device is electrically connected with the energy storage device, and the energy storage device is electrically connected with the electric heating device.
In some embodiments, the gas turbine system further comprises: the medium supply device comprises a second medium outlet, a medium conveying pipeline, a seventh switch valve and a third switch valve, wherein the first end of the medium conveying pipeline is connected with the second medium outlet, the second end of the medium conveying pipeline is connected with the second pipeline, and the seventh switch valve is arranged on the medium conveying pipeline.
In some embodiments, the gas turbine system further comprises: the medium exhaust device comprises a second medium inlet, a medium discharge pipeline, an eighth switch valve and a medium exhaust device, wherein the first end of the medium discharge pipeline is connected with the second medium outlet, the second end of the medium discharge pipeline is connected with the second pipeline, and the eighth switch valve is arranged on the medium discharge pipeline.
A power generation system according to an embodiment of the present invention includes the gas turbine system according to any one of the above embodiments, and the power generation system further includes: a generator coupled to a gas turbine of the gas turbine system.
Drawings
FIG. 1 is a schematic block diagram of a gas turbine system according to an embodiment of the present invention.
Reference numerals:
a gas turbine system 100;
a gas turbine 1; a fuel inlet 11; a flue gas outlet 12;
a renewable energy power generation device 2; a rectifier 21;
an electric heating device 3; a first medium inlet 31; a first medium outlet 32;
a gas preheating device 4; a first heat absorbing side inlet 41; a first heat absorption side outlet 42; a first heat release side inlet 43; a first heat release side outlet 44;
a first pipe 51; a first end 511; a second end 512; a second conduit 52; a first end 521; a second end 522; a third pipe 53; a first end 531; a second end 532; a fourth line 54; a first end 541; a second end 542; a fifth pipeline 55; a first end 551; a second end 552; a sixth conduit 56; a first end 561; a second end 562; a seventh pipe 57; a first end 571; a second end 572; an eighth conduit 58; a first end 581; a second end 582; a bypass line 59; a first end 591; a second end 592; a ninth conduit 50; a first end 501; a second end 502;
a waste heat utilization device 6; a second heat absorption side inlet 61; a second heat absorption side outlet 62; a second heat release side inlet 63; a second heat release side outlet 64;
the first on-off valve 71; a second on-off valve 72; a third on/off valve 73; a fourth switching valve 74; a fifth on-off valve 75; the sixth switching valve 76; a seventh on-off valve 77; an eighth switching valve 78;
an energy storage device 8;
a medium supply device 9; a second medium outlet 91; a medium delivery line 92;
a medium discharge device 10; a second medium inlet 101; a medium discharge line 102;
a generator 20; a power grid 30; a pressure sensor 40.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A gas turbine system 100 of an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1, a gas turbine system 100 according to an embodiment of the present invention includes a renewable energy power generation device 2, an electric heating device 3, a gas preheating device 4, a gas turbine 1, a first pipe 51, a second pipe 52, and a third pipe 53.
The electric heating device 3 is electrically connected to the renewable energy power generation device 2, so that the renewable energy power generation device 2 supplies electric power to the electric heating device 3, and the electric heating device 3 has a first medium inlet 31 and a first medium outlet 32. The medium can enter the electric heating device 3 from the first medium inlet 31, so that the electric heating device 3 heats the medium, and the heated medium is discharged from the first medium outlet 32.
The gas preheating device 4 has a first heat absorption side inlet 41, a first heat absorption side outlet 42, a first heat release side inlet 43, and a first heat release side outlet 44. The first heat absorption side inlet 41 is communicated with a gas source, and the gas source conveys gas into the gas preheating device 4 through the first heat absorption side inlet 41, so that the gas preheating device 4 exchanges heat with the gas entering the gas turbine 1 through a medium, and the gas is heated.
The first end 511 of the first pipe 51 is connected to the first medium outlet 32, and the second end 512 of the first pipe 51 is connected to the first heat release side inlet 43. The first heat release side inlet 43 of the gas preheating device 4 is communicated with the first medium outlet 32 of the electric heating device 3 through a first pipeline 51, and a medium heated by the electric heating device 3 is discharged through the first medium outlet 32 and then sequentially enters the gas preheating device 4 through the first pipeline 51 and the first heat release side inlet 43, so that the medium can exchange heat with the gas in the gas preheating device 4 to further heat the gas.
The gas turbine 1 comprises a fuel inlet 11 and a flue gas outlet 12, a first end 531 of the third pipe 53 being connected to the first heat absorbing side outlet 42, and a second end 532 of the third pipe 53 being connected to the fuel inlet 11. It is understood that the first heat absorption side outlet 42 of the gas preheating device 4 is communicated with the fuel inlet 11 of the gas turbine 1 through the third pipeline 53, so that the gas heated by the gas preheating device 4 can enter the gas turbine 1.
The first end 521 of the second pipe 52 is connected to the first heat release-side outlet 44, and the second end 522 of the second pipe 52 is connected to the first medium inlet 31. In other words, the first heat release side outlet 44 of the gas preheating device 4 is communicated with the first medium inlet 31 of the electric heating device 3 through the second pipeline 52, and the medium after heat exchange with the gas is discharged through the first heat release side outlet 44 and then sequentially enters the gas preheating device 4 through the second pipeline 52 and the first medium inlet 31, so that the electric heating device 3 can heat the medium after heat exchange with the gas.
It will be appreciated that when the gas turbine system 100 is in operation, the medium enters the electric heating device 3 through the first medium inlet 31, so that the electric heating device 3 heats the medium to form a high temperature medium. The high temperature medium is discharged through the first medium outlet 32 and enters the gas preheating device 4 through the first heat release side inlet 43, and the high temperature medium in the gas preheating device 4 exchanges heat with the gas, so that the gas is heated. The heated gas is discharged through the first heat absorption side outlet 42 and enters the gas turbine 1 through the fuel inlet 11 for combustion, a medium which exchanges heat with the gas is discharged from the gas preheating device 4 through the first heat release side outlet 44 and enters the electric heating device 3 through the first medium inlet 31, and the electric heating device 3 heats the medium, so that the medium can circularly absorb and release heat in the gas turbine system 100, and the gas can be continuously heated.
The gas turbine system 100 of the embodiment of the invention supplies power to the electric heating device 3 by using the renewable energy power generation device 2, so that the electric heating device 3 heats a medium, and then preheats the gas by using the heated medium, so that the electric energy generated by the renewable energy replaces the heat energy generated by the combustion of the gas in the gas turbine 1 to preheat the gas, that is, the renewable energy which can be continuously used replaces the expensive fuel to preheat the pre-burning fuel, so that the heat generated by the combustion of the gas in the gas turbine 1 can be completely used for acting, thereby reducing the cost of preheating the gas and avoiding the waste of the heat generated by the combustion of the fuel.
Thus, the gas turbine system 100 of the present embodiment preheats the combustion gases at a low cost.
Note that the renewable energy source used by the renewable energy power generation device 2 may be at least one; alternatively, the renewable energy source utilized by the renewable energy power generation device 2 may be solar energy; alternatively, the renewable energy source utilized by the renewable energy power generation device 2 may be water energy; alternatively, the renewable energy used by the renewable energy power generation device 2 may be another renewable energy.
In some embodiments, the gas preheating device 4 comprises a first heat-releasing channel comprising a first heat-releasing side inlet 43 and a first heat-releasing side outlet 44, and a first heat-absorbing channel comprising a first heat-absorbing side inlet 41 and a first heat-absorbing side outlet 42.
It can be understood that the fuel gas enters the first heat absorption channel through the first heat absorption side inlet 41, and the medium enters the first heat release channel through the first heat release side inlet 43, so that the fuel gas and the medium can exchange heat through the first heat absorption channel and the first heat release channel, and the temperature of the fuel gas is increased.
In some embodiments, as shown in FIG. 1, a gas turbine system 100 of an embodiment of the present invention includes a waste heat utilization device 6, a fourth pipeline 54, and a fifth pipeline 55.
The waste heat utilization device 6 has a second heat absorption side inlet 61, a second heat absorption side outlet 62, a second heat release side inlet 63, and a second heat release side outlet 64, and the second end 512 of the first pipe 51 is connected to the second heat absorption side inlet 61. The first end 541 of the fourth pipe 54 is connected to the second heat absorption side outlet 62, and the second end 542 of the fourth pipe 54 is connected to the first heat release side inlet 43. That is, the second end 512 of the first pipe 51 is connected to the first heat-releasing-side inlet 43 through the residual heat utilization device 6 and the fourth pipe 54.
In other words, the residual heat utilization device 6 is used to heat the medium, the residual heat utilization device 6 communicates with the electric heating device 3, and the medium discharged from the electric heating device 3 is transported into the residual heat utilization device 6 through the first pipeline 51, so that the residual heat utilization device 6 heats the medium.
When the renewable energy power generation device 2 generates power using renewable energy, there may be a case where the renewable energy is unstable, for example, when sunlight is insufficient such as cloudy days when the renewable energy power generation device 2 generates power using solar energy, the amount of power generated by the renewable energy power generation device 2 may be insufficient or power generation may be stopped.
When the power output by the renewable energy power generation device 2 is insufficient, the temperature of the medium heated by the electric heating device 3 cannot heat the fuel gas to a preset temperature value, and the medium can be heated by the waste heat utilization device 6, so that the medium can heat the fuel gas to the preset temperature value. That is, when the heat provided by the electric heating device 3 is insufficient, the waste heat utilization device 6 can provide enough heat to keep the temperature of the medium at the preset temperature value all the time, and therefore, the gas turbine system 100 can be ensured to operate more stably.
A first end 551 of the fifth duct 55 is connected to the flue gas outlet 12 and a second end 552 of the fifth duct 55 is connected to the second heat rejecting side inlet 63. Specifically, the flue gas outlet 12 is used for discharging high-temperature flue gas generated after combustion of gas in the gas turbine 1, and the high-temperature flue gas is discharged from the flue gas outlet 12 and then conveyed to the second heat release side inlet 63 through the fifth pipeline 55, so that the medium in the waste heat utilization device 6 is heated by the high-temperature flue gas.
In some embodiments, the waste heat utilization device 6 includes a second heat release path including a second heat release side inlet 63 and a second heat release side outlet 64, and a second heat absorption path including a second heat absorption side inlet 61 and a second heat absorption side outlet 62.
It can be understood that the medium enters the second heat absorption channel through the second heat absorption side inlet 61, and the high temperature flue gas enters the second heat release channel through the second heat release side inlet 63, so that the high temperature flue gas and the medium can exchange heat through the first heat absorption channel and the first heat release channel, and the temperature of the medium is increased.
In some embodiments, the medium is an inert gas. It will be appreciated that leakage problems may occur between the first heat-absorbing path and the first heat-releasing path, and that mixing of inert gas with gas leakage is less likely to cause deflagration, thus improving the safety of the gas turbine system 100 of an embodiment of the present invention.
In some embodiments, the gas turbine system 100 of embodiments of the present invention further includes a sixth line 56, a seventh line 57, a bypass line 59, a first switching valve 71, and a second switching valve 72.
The first end 561 of the sixth pipe 56 is connected to the second end 512 of the first pipe 51, and the second end 562 of the sixth pipe 56 is connected to the second heat absorption side inlet 61.
The first end 571 of the seventh pipe 57 is connected to the first end 541 of the fourth pipe 54, and the second end 572 of the seventh pipe 57 is connected to the second heat absorption side outlet 62. The second switching valve 72 is provided on one of the sixth line 56 and the seventh line 57. In other words, the second switching valve 72 is provided on the sixth piping 56; alternatively, the second switching valve 72 is provided on the seventh pipe 57.
For example, as shown in fig. 1, a second switching valve 72 is provided on the seventh pipe 57.
A first end 591 of the bypass line 59 is connected to the second end 512 of the first line 51, a second end 592 of the bypass line 59 is connected to the first end of the fourth conduit, and a first switching valve 71 is provided on the bypass line 59.
When the power output by the renewable energy power generation device 2 is insufficient, the waste heat utilization device 6 and the electric heating device 3 are required to heat the medium together, the first switch valve 71 is closed, the second switch valve 72 is opened, the bypass pipeline 59 is closed, the medium passes through the electric heating device 3 and is conveyed into the waste heat utilization device 6 through the first pipeline 51 and the sixth pipeline 56 to be heated for the second time, and therefore the medium can heat the fuel gas to a preset temperature value.
When the output power of the renewable energy power generation device 2 is zero, the waste heat utilization device 6 heats the medium, the first switch valve 71 is closed, the second switch valve 72 is opened, the bypass pipeline 59 is closed, and the medium passes through the electric heating device 3 and is conveyed into the waste heat utilization device 6 through the first pipeline 51 and the sixth pipeline 56 to be heated, so that the medium can heat the fuel gas to a preset temperature value.
When the power output by the renewable energy power generation device 2 is sufficient, only the electric heating device 3 is needed to heat the medium, the second switch valve 72 is closed, the first switch valve 71 is opened, the connection between the waste heat utilization device 6 and the gas preheating device 4 is disconnected, and the medium is heated by the electric heating device 3, passes through the first pipeline 51 and the bypass pipeline 59, and then enters the gas preheating device 4.
For example, as shown in fig. 1, the second on-off valve 72 is closed to disconnect the connection between the waste heat utilization device 6 and the gas preheating device 4, and the medium may enter the waste heat utilization device 6 from the second heat absorption side inlet 61 of the waste heat utilization device 6 to absorb a small amount of heat of the flue gas, but the medium entering the waste heat utilization device 6 is small, and the amount of heat absorbed by the flue gas is small, and the influence on the heat efficiency of the gas turbine 1 is small.
In some embodiments, as shown in fig. 1, the gas turbine system 100 of the embodiment of the invention further includes a third on-off valve 73, the third on-off valve 73 being provided on the other of the sixth pipe 56 and the seventh pipe 57. For example, as shown in fig. 1, a third on/off valve 73 is provided on the sixth line 56.
It can be understood that, when the power output by the renewable energy power generation device 2 is sufficient, only the electric heating device 3 is needed to heat the medium, the second switch valve 72 and the third switch valve 73 are closed, the first switch valve 71 is opened, the connection between the waste heat utilization device 6 and the gas preheating device 4 is disconnected, and the medium cannot enter the waste heat utilization device 6, i.e., cannot pass through the heat absorption side inlet or the heat absorption side outlet, so that the thermal efficiency of the gas turbine 1 is improved.
In some embodiments, as shown in FIG. 1, a gas turbine system 100 of an embodiment of the present invention further includes an eighth conduit 58, a ninth conduit 50, a fourth on-off valve 74, and a fifth on-off valve 75.
A fourth switching valve 74 is provided on the eighth line 58, and a fifth switching valve 75 is provided on one of the first line 51 and the ninth line 50. In other words, the fourth switching valve 74 is provided on the first line 51; alternatively, the fifth switching valve 75 is provided on the ninth line 50. For example, as shown in fig. 1, a fifth switching valve 75 is provided on the ninth line 50.
The first on-off valve 71 is located between the second end 592 of the bypass line 59 and the junction of the eighth line 58 and the bypass line 59.
It can be understood that, when the renewable energy power generation device 2 does not output electric energy, for example, the renewable energy power generation device 2 fails, the first switch valve 71 and the fifth switch valve 75 are closed, the fourth switch valve 74, the second switch valve 72 and the third switch valve 73 are opened, the gas preheating device 4 and the electric heating device 3 are disconnected, the gas preheating device 4 is communicated with the waste heat utilization device 6, the medium can enter the waste heat utilization device 6 through the eighth pipeline 58, the bypass pipeline 59 and the sixth pipeline 56 in sequence, and enters the gas preheating device 4 after being heated by the waste heat utilization device 6, and the medium is no longer heated by the electric heating device 3.
When the electric heating device 3 and the waste heat utilization device 6 both heat the medium, the first switch valve 71 and the fourth switch valve 74 are closed, the second switch valve 72, the third switch valve 73 and the fifth switch valve 75 are opened, the gas preheating device 4 is communicated with the waste heat utilization device 6, the waste heat utilization device 6 is communicated with the electric heating device 3, the medium can sequentially pass through the electric heating device 3 and the waste heat utilization device 6, and the medium heated by the electric heating device 3 and the waste heat utilization device 6 enters the gas preheating device 4 to exchange heat with the gas.
When only the electric heating device 3 is used for heating a medium, the second switch valve 72, the third switch valve 73 and the fourth switch valve 74 are closed, the first switch valve 71 and the fifth switch valve 75 are opened, the gas preheating device 4 is communicated with the electric heating device 3, the waste heat utilization device 6 and the gas preheating device 4 are disconnected, and the medium heated by the electric heating device 3 enters the gas preheating device 4 to exchange heat with gas.
In some embodiments, as shown in FIG. 1, the gas turbine system 100 of an embodiment of the present invention further includes a sixth switching valve 76, the sixth switching valve 76 being provided on the other of the first pipe 51 and the ninth pipe 50. For example, as shown in fig. 1, a sixth switching valve 76 is provided on the first pipe 51.
When the electric heating device 3 does not heat the medium, that is, the medium is heated only by the waste heat utilization device 6, the first switch valve 71, the fifth switch valve 75 and the sixth switch valve 76 are closed, the second switch valve 72, the third switch valve 73 and the fourth switch valve 74 are opened, the circuit between the electric heating device 3 and the gas preheating device 4 is cut off, and the medium cannot enter the electric heating device 3, so that the heat of the medium cannot be dissipated in the electric heating device 3, and the heat efficiency of the gas turbine 1 is improved.
In some embodiments, as shown in fig. 1, the gas turbine system 100 of the embodiment of the present invention further includes an energy storage device 8, the renewable energy power generation device 2 is electrically connected to the energy storage device 8, and the energy storage device 8 is electrically connected to the electric heating device 3.
It is understood that the energy storage device 8 is used for storing the electric energy generated by the renewable energy power generation device 2 and providing the electric energy for the electric heating device 3. When the power output by the renewable energy power generation device 2 is greater than the power consumed by the electric heating device 3, the energy storage device 8 can store redundant electric quantity, and when the power output by the renewable energy power generation device 2 is insufficient, the energy storage device 8 can release the stored redundant electric quantity, so that the electric heating device 3 can be ensured to stably heat the medium.
In some embodiments, as shown in fig. 1, the gas turbine system 100 of the embodiment of the present invention further includes a rectifier 21, the rectifier 21 is connected between the renewable energy power generation device 2 and the energy storage device 8, the rectifier 21 is used for converting the alternating current generated by the renewable energy power generation device 2 into direct current, and the converted direct current is transmitted to the energy storage device 8 to be used by the electric heating device 3.
In some embodiments, as shown in fig. 1, the gas turbine system 100 of the embodiment of the present invention further includes a medium supply device 9, a medium delivery line 92, and a seventh switching valve 77.
Specifically, the medium supplying device 9 stores a medium therein, the medium supplying device 9 includes a second medium outlet 91, a first end of the medium delivery pipe 92 is connected to the second medium outlet 91, a second end of the medium delivery pipe 92 is connected to the second pipe 52, and the seventh switching valve 77 is provided on the medium delivery pipe 92.
The first pipeline 51, the second pipeline 52, the fourth pipeline 54, the sixth pipeline 56, the seventh pipeline 57, the eighth pipeline 58, the bypass pipeline 59, the ninth pipeline 50, the electric heating device 3, the first heat releasing channel and the second heat absorbing channel form a heating circulation system.
It can be understood that the medium supply device 9 supplies the medium to the heating cycle system, and when the pressure of the medium in the pipeline is lower than the preset pressure value, the medium supply device 9 can supply additional medium to the heating cycle system through the medium conveying pipeline 92, so as to increase the pressure of the medium in the heating cycle system, and ensure the stable operation of the gas turbine system 100.
In some embodiments, as shown in FIG. 1, the gas turbine system 100 of an embodiment of the present invention further includes a medium discharge device 10, a medium discharge line 102, and an eighth switching valve 78.
Specifically, the medium discharge device 10 includes a second medium inlet 101, a first end of a medium discharge line 102 is connected to the second medium inlet 101, a second end of the medium discharge line 102 is connected to the second line 52, and the eighth switching valve 78 is provided on the medium discharge line 102.
It can be understood that when the pressure in the heating cycle system is higher than the preset pressure value, the medium discharging device 10 is used to discharge a part of the medium in the heating cycle system, so as to reduce the pressure of the medium in the heating cycle system and ensure stable operation of the gas turbine system 100.
In some embodiments, the gas turbine system 100 of the present embodiment further includes a pressure sensor 40, the pressure sensor 40 is used for detecting the pressure of the medium in the gas turbine system 100, and the pressure sensor 40 is electrically connected to the eighth switch valve 78 and the seventh switch valve 77.
It will be appreciated that the pressure sensor 40 may detect a pressure value of the medium in the gas turbine system 100, and may further adjust the pressure of the medium in the gas turbine system 100 through the medium exhaust device 10 and the medium supply device 9 according to the detected pressure value of the medium, thereby ensuring stable operation of the gas turbine system 100.
A power generation system of an embodiment of the present invention is described below with reference to the drawings.
Referring to FIG. 1, a power generation system according to an embodiment of the present invention is a gas turbine system 100 according to any of the above embodiments.
The power generation system of the embodiment of the present invention further includes a generator 20, and the generator 20 is connected to the gas turbine 1 of the gas turbine system 100. It is understood that the energy generated by the combustion of the gas turbine 1 drives the generator 20 to generate electricity, and the electricity generated by the generator 20 is transmitted to the power grid 30.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A gas turbine system, comprising:
a renewable energy power generation device;
an electrical heating device electrically connected to the renewable energy power generation device, the electrical heating device having a first medium inlet and a first medium outlet,
the gas preheating device is provided with a first heat absorption side inlet, a first heat absorption side outlet, a first heat release side inlet and a first heat release side outlet,
a first pipe having a first end connected to the first medium outlet and a second end connected to the first heat release side inlet,
a first end of the second pipeline is connected with the first heat release side outlet, and a second end of the second pipeline is connected with the first medium inlet;
a gas turbine comprising a fuel inlet and a flue gas outlet; and
and a first end of the third pipeline is connected with the first heat absorption side outlet, and a second end of the third pipeline is connected with the fuel inlet.
2. The gas turbine system of claim 1, further comprising:
the waste heat utilization device is provided with a second heat absorption side inlet, a second heat absorption side outlet, a second heat release side inlet and a second heat release side outlet, and the second end of the first pipeline is connected with the second heat absorption side inlet;
a first end of the fourth pipeline is connected with the second heat absorption side outlet, and a second end of the fourth pipeline is connected with the first heat release side inlet; and
and the first end of the fifth pipeline is connected with the smoke outlet, and the second end of the fifth pipeline is connected with the second heat release side inlet.
3. The gas turbine system of claim 2, further comprising:
a sixth pipeline, a first end of which is connected to the second end of the first pipeline, and a second end of which is connected to the second heat absorption side inlet;
a seventh pipeline, a first end of the seventh pipeline being connected to the first end of the fourth pipeline, a second end of the seventh pipeline being connected to the second heat absorption side outlet;
a bypass line, a first end of the bypass line connected to the second end of the first line, a second end of the bypass line connected to the first end of the fourth pipe;
the first switch valve is arranged on the bypass pipeline;
a second switching valve provided on one of the sixth pipeline and the seventh pipeline.
4. The gas turbine system of claim 3, further comprising: a third on-off valve provided on the other of the sixth line and the seventh line.
5. The gas turbine system of claim 3, further comprising:
a first end of the eighth pipeline is connected with the second pipeline, and a second end of the eighth pipeline is connected with the bypass pipeline;
a ninth pipe, a first end of the ninth pipe being connected to the second end of the second pipe, a second end of the ninth pipe being connected to the first medium inlet;
the fourth switching valve is arranged on the eighth pipeline;
a fifth switching valve provided on one of the first and ninth lines;
the first switch valve is located between the second end of the bypass line and a junction of the eighth line and the bypass line.
6. The gas turbine system of claim 5, further comprising: a sixth switching valve provided on the other of the first line and the ninth line.
7. The gas turbine system of claim 1, further comprising: the renewable energy power generation device is electrically connected with the energy storage device, and the energy storage device is electrically connected with the electric heating device.
8. The gas turbine system of claim 2, further comprising: a medium supply device comprising a second medium outlet,
a medium delivery pipe, a first end of the medium delivery pipe is connected with the second medium outlet, a second end of the medium delivery pipe is connected with the second pipe,
a seventh switching valve provided on the medium conveying pipeline.
9. The gas turbine system of claim 8, further comprising: a medium exhaust comprising a second medium inlet,
a medium discharge line, a first end of the medium discharge line being connected to the second medium outlet, a second end of the medium discharge line being connected to the second line,
an eighth switching valve provided on the medium discharge line.
10. A power generation system comprising the gas turbine system of any of claims 1-6, further comprising: a generator coupled to a gas turbine of the gas turbine system.
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| CN202210405543.6A CN114837818A (en) | 2022-04-18 | 2022-04-18 | Gas turbine system and power generation system |
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| CN202210405543.6A CN114837818A (en) | 2022-04-18 | 2022-04-18 | Gas turbine system and power generation system |
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