JP4065824B2 - Gas turbine apparatus and bleed operation method thereof - Google Patents

Description

  The present invention relates to a gas turbine apparatus that supplies extracted air extracted from a gas turbine compressor to an external facility, and a method for extracting the gas turbine apparatus.

  There is a coal gasification combined power plant as the most typical system for extracting air from a compressor of a gas turbine device and using it for external equipment. In this system, air is extracted from the gas turbine compressor outlet, and the extracted air is directly supplied to the coal gasifier as a coal gasification agent, or the extracted air is supplied as raw material air to an air separation facility. Oxygen is produced from the coal, and the produced oxygen is supplied to the coal gasifier as a gasifying agent.

  A system for supplying air extracted from a gas turbine as a coal gasification agent directly to a coal gasifier is described in JP-A-1-178727.

Japanese Patent Laid-Open No. 1-178727 (FIG. 1)

  In Japanese Patent Laid-Open No. 1-178727 described above, the extracted air of the gas turbine is supplied as a gasifying agent to a coal gasification furnace having a pressure higher than the extraction pressure of the gas turbine compressor. For this reason, a booster compressor is installed to pressurize the air extracted from the compressor. In this prior art, in order to reduce the driving power of the booster compressor, the gas turbine compressor inlet guide vanes are operated to increase the gas turbine compressor outlet pressure, thereby increasing the pressure of the bleed air (the booster compressor inlet). Pressure) is increased.

  Here, in the above prior art, in order to compensate for the decrease in the gas turbine inlet flow rate due to the extraction from the compressor outlet and the accompanying decrease in the compressor outlet pressure, the inlet guide vanes of the gas turbine compressor are opened. The compressor flow rate is increased. Thereby, the compressor outlet pressure can be increased.

  Here, in a plant equipped with equipment that uses air outside, it is necessary to switch the supply from the auxiliary air compressor to the gas turbine bleed air during the start-up process, and from the gas turbine bleed air to the auxiliary air compressor during the stop process. It is necessary to switch operation. In such a case, in order to suppress fluctuations in the pressure of the external equipment that is the air supply destination in the operation switching process, the extracted air extracted from the gas turbine compressor and the raw air supplied from the auxiliary air compressor It is desirable to switch after matching the flow rate and pressure. However, the above-described prior art has not considered the above points.

  In order to prevent the pressure in the air separation facility from fluctuating during the switching process, the switching is performed after matching the flow rate and pressure of the extracted air extracted from the gas turbine compressor and the raw air supplied from the raw air compressor. Is desired.

  The objective of this invention is providing the gas turbine apparatus which can suppress the pressure fluctuation of the external installation which is an air supply destination in the process switched to the extraction from a gas turbine compressor exit, and its extraction operation method.

  In order to achieve the above object, a flow rate variable device is installed in the gas turbine compressor, and the flow rate and pressure of air extracted from the compressor outlet are adjusted by adjusting the amount of fuel supplied to the flow rate variable device and the combustor. It is intended to be adjusted.

  Also, in order to achieve the above objective, a method for calculating the gas turbine inlet mass flow rate from the gas turbine outlet temperature and compressor outlet pressure is presented, thereby obtaining the bleedable air flow rate and pressure and installing them in the gas turbine compressor The flow rate and pressure of the bleed air supplied to the outside can be changed by adjusting the amount of fuel supplied to the variable flow device and the combustor.

  In order to achieve the above object, steam, nitrogen or carbon dioxide is supplied from the outside to the gas turbine combustor as the flow rate varying means.

  In order to achieve the above object, auxiliary fuel from auxiliary fuel equipment is supplied to the gas turbine combustor.

  According to the present invention, the mass flow rate and pressure of the air extracted from the compressor outlet can be adjusted. Therefore, in the process of switching to the extraction from the gas turbine compressor outlet, the pressure fluctuation of the external equipment that is the air supply destination is changed. There exists an effect that it can control.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  FIG. 1 is a system diagram of a gas turbine apparatus according to an embodiment of the present invention. The main components of the gas turbine apparatus are a compressor 2, a combustor 3, and a gas turbine 4. The compressor 2 and the gas turbine 4 are coupled dynamically, and further coupled to the generator 5 also. An inlet guide vane 1 is installed at the inlet of the compressor 2 together with its driving device. In addition, as a cooling air supply system to the gas turbine 4, a cooling air passage 22 for supplying the outlet air of the compressor 2 or the air extracted from the intermediate stage is provided. An exhaust gas duct 28 that guides the combustion exhaust gas that has driven the gas turbine to the heat recovery facility 11 is connected to the outlet of the gas turbine 4. A gas turbine exhaust thermometer 52 for measuring the gas turbine exhaust temperature is installed at the gas turbine outlet. The flue gas exhausted from the gas turbine is subjected to exhaust heat recovery by the heat recovery equipment 11 connected to the exhaust gas duct 28. The outlet of the heat recovery facility 11 is connected to the chimney 12.

  The fuel gas supply facility 9 is connected to the combustor 3 through a fuel pipe 21. A fuel pipe 21 that supplies fuel to the combustor 3 of the gas turbine equipment includes a fuel source cutoff valve 32 that shuts off the fuel supply, a fuel pressure adjustment valve 33 that regulates the fuel pressure, and a fuel flow rate that regulates the fuel flow rate. A control valve 35 and a fuel pressure gauge 34 for measuring the fuel pressure are installed.

  A compressor outlet pressure gauge 50 and a compressor outlet thermometer 51 are installed at the outlet of the compressor 2 to measure the pressure and temperature of the compressed air at the outlet of the compressor 2. In addition, an extraction pipe A <b> 23 that supplies the extraction air from the compressor to the extraction air cooler 6 is connected to the outlet of the compressor 2. The extraction air cooler 6 is connected to a cooling pipe 31 having a cooling water flow rate control valve 36, and is supplied with cooling water as a cooling medium for the extraction air. The extraction air cooler 6 and the air / water separator 7 are connected by an extraction pipe B24, and an extraction air thermometer 37 is installed in the extraction pipe B. A bleed pipe C25 is connected to the outlet side of the steam separator 7, and a flow measurement orifice 38 and a bleed flow meter 39 are installed in the bleed pipe C25. Further, the flow path of the extraction pipe C25 is branched by the extraction pipe D26 and the extraction pipe E27. A check valve 40, a bleed air shutoff valve 41, and a bleed air pressure gauge 42 are installed in the bleed pipe D26, and are connected to the external equipment 8 to which the bleed air is supplied. A bleed flow control valve 43 is installed in the bleed pipe E27, and the tip is connected to the bleed air discharge duct 10.

  In the gas turbine apparatus of the present embodiment configured as described above, the air 20 whose inflow air amount is adjusted by the inlet guide vanes 1 is taken into the compressor 2, and the pressure is increased by the compressor 2 and supplied to the combustor 3. To do. In the combustor 3, the fuel gas supplied from the fuel gas supply facility 9 through the fuel pipe 21 is burned as fuel, and the gas turbine 4 is driven by the combustion gas to generate power. As a result, the compressor 2 and the generator 5 are driven, and the generator 5 generates electric power. The fuel source shutoff valve 32 installed in the fuel pipe 21 is used when shutting off the supply of fuel gas when the gas turbine is stopped.

  The fuel pressure control valve 33 installed in the fuel pipe 21 performs control so that the fuel pressure measured by the fuel pressure gauge 34 installed on the upstream side of the fuel flow control valve 35 is constant. Thereby, the fuel flow rate adjustment valve 35 can supply the fuel gas flow rate corresponding to the valve opening degree to the combustor 3.

  Since the inlet temperature of the gas turbine 4 is high, the compressed air is extracted from the compressor 2 as cooling air and supplied to the gas turbine 4 through the cooling air passage 22. The combustion exhaust gas leaving the gas turbine 4 passes through the exhaust gas duct 28 and is supplied to the heat recovery facility 11. In the heat recovery facility 11, steam or the like is generated by recovering exhaust heat from the combustion exhaust gas. The combustion exhaust gas 30 exiting the heat recovery facility 11 is released from the chimney 12 to the atmosphere.

  Further, the bleed air leaving the compressor 2 is supplied to the bleed air cooler 6 through the bleed pipe A23. The extraction air cooler 6 is cooled by the cooling water supplied from the cooling pipe 31 provided with the cooling water flow rate control valve 36. Here, the temperature of the extraction air cooled by the extraction air cooler 6 is determined by the extraction air thermometer 37 installed in the extraction pipe B24 located on the downstream side of the extraction air cooler 6 from the external equipment of the extraction air supply destination. The cooling water flow rate control valve 36 is controlled so that the predetermined temperature required by 8 is reached.

  The extraction air cooled by the extraction air cooler 6 is supplied to the steam separator 7 through the extraction pipe B24. In the steam / water separator 7, the condensed water is separated from the extracted air cooled by the extracted air cooler 6. The bleed air that has exited the steam separator 7 passes through the bleed pipe C25, and the bleed air flow rate is measured by the flow measurement orifice 38 and the bleed flow meter 39. The extracted air that has flowed from the flow rate measurement orifice 38 to the extraction pipe D26 passes through the check valve 40 and the extraction air shut-off valve 41, and is supplied to the external equipment 8 that uses the extracted air. In addition, the extracted air that has branched and flowed to the extraction pipe E27 passes through the extraction flow control valve 43 and is discharged from the extraction air discharge duct 10 to the atmosphere.

In the gas turbine 4, as in a general gas turbine, a constant relationship called G3 × T3 ^0.5 / P3 = constant is established between the mass flow rate G3 at the inlet, the temperature T3, and the pressure P3. The pressure P2 at the outlet of the compressor 2 and the pressure P3 at the inlet of the gas turbine 4 have a pressure loss when passing through the combustor. Generally, the pressure loss is about 2 to 4%, and if P2≈P3,
G3 × T3 ^0.5 / P2 = constant (Expression 1)
It becomes. From this equation, the relationship between the mass flow rate G3 at the inlet of the gas turbine 4 and the absolute temperature T3 and the pressure P3 is clarified. For example, in order to keep P2 constant when the mass flow rate G3 changes, how should T3 be set? As can be seen, in practice, the temperature T3 at the inlet of the gas turbine 4 cannot be measured because it is high, and G3 cannot be directly measured.

Here, a gas turbine outlet temperature T4 that can be measured at a relatively low temperature is used. The outlet temperature T4 of the gas turbine 4 is generally determined by assuming that the polytropic index of the gas turbine is n and the gas turbine outlet pressure is P4.
T4 = T3 (P4 / P3) ^{(n-1) / n}
If P2≈P3, then
T4 = T3 (P4 / P2) ^{(n-1) / n} (Formula 2)
It becomes. Here, if (Equation 2) is substituted into (Equation 1),
(G3 / P2). {T4. (P2 / P4) ^{(n-1) / n} } ^0.5
= {(G3 / P2) ² · T4 · (P2 / P4) ^{(n-1) / n} } ^0.5
= Constant G3 ² · T4 · P2- ^{(n + 1) / n} / P4 ^{(n-1) / n} = constant, and the gas turbine outlet pressure P4 can be regarded as substantially constant.
G3 ² · T4 · (1 / P2) ^{(n + 1) / n} = constant. Therefore, when the relationship between G3, T4, and P2 as the base and any G3 ′, T4 ′, and P2 ′ is obtained,
T4 '= T4 (G3 / G3') ^2. (P2 '/ P2) ^{(n + 1) / n} (Formula 3)
It becomes. When G3, T4, and P2 are given as base conditions, this equation clearly shows the relationship among the turbine inlet mass flow rate G3 ′, the turbine outlet temperature T4 ′, and the compressor outlet pressure P2 ′.

The polytropic index n is given by (n-1) / n = 1n (T4 / T3) / 1n (P4 / P2) from (Equation 2) if the base conditions T3, T4, P4 and P2 are given.
(N + 1) / n = 2− (n−1) / n
This can be substituted into (Equation 3). The mass flow rate G3 at the turbine inlet is
G3 = G0−Gc + Gf−Gex
It becomes.

  Here, G0: compressor inlet air mass flow rate, Gc: turbine cooling air mass flow rate, Gf: fuel mass flow rate, Gex: bleed air mass flow rate. The fuel mass flow rate Gf can be measured by the bleed flow meter 39 from the opening degree of the fuel flow rate control valve 35 and the like. Since the compressor inlet air mass flow rate G0 varies depending on the atmospheric temperature and also varies with the aging of the compressor, it is difficult to obtain an accurate value. As for the turbine cooling air mass flow rate Gc, the planned value and the measured value at the time of the test are clear, but it is difficult to obtain an accurate value in an actual machine in consideration of a secular change or the like. In the present invention, the turbine inlet mass flow rate G3 can be obtained from the measurable gas turbine outlet temperature T4 and the compressor outlet pressure P2 by (Equation 3). These relationships are shown in FIG.

FIG. 2 shows that the turbine inlet mass flow rate G3 = 100 kg / s, the turbine inlet temperature T3 = 1673K, the compressor outlet pressure P2 = 1.57 MPa, the gas turbine outlet pressure P4 = 0.01013 MPa, and the gas turbine outlet temperature T4 as base conditions. = 873K, the relationship between the turbine outlet temperature T4 and the compressor outlet pressure P2 when the turbine inlet mass flow rate G3 is a constant 70, 75, 80, 85, 90, 100 kg / s is shown. For reference, a line having a constant turbine inlet temperature T3 is indicated by a broken line.

  Next, an operation method that enables adjustment of the flow rate and pressure of the extraction air extracted from the compressor 2 will be described with reference to FIG. First, a certain operating state A is assumed. Specifically, the point A shown in FIG. 2 indicates that the compressor outlet pressure P2 = 1.3 Mpa measured by the compressor outlet pressure gauge 50 and the gas turbine outlet thermometer 52 measured by the gas turbine exhaust thermometer 52. The turbine inlet mass flow rate G3 can be calculated from the temperature T4 = 421 ° C., and the operating state at the point A can be known.

  Next, a case where 10 kg / s extraction is performed from the gas turbine apparatus operated at the point A will be described. When the extraction air shutoff valve 41 of the extraction pipe D26 is fully closed and the extraction flow rate control valve 43 of the extraction pipe E27 is opened to perform extraction, air is extracted from the outlet of the compressor 2 through the extraction pipe A23, and the extraction air cooler 6 and the steam separator 7 are discharged from the bleed air discharge duct 10 to the atmosphere.

  When bleed is performed from the outlet of the compressor 2, the gas turbine inlet mass flow rate G3 decreases, so that the compressor outlet pressure P2 decreases as apparent from (Equation 1). Further, if the fuel flow rate adjustment valve 35 is kept open and the amount of fuel gas supplied to the combustor does not change, the amount of air supplied to the combustor 3 decreases, so that the turbine inlet temperature T3 rises. Therefore, the operating point of the gas turbine apparatus that was operating at point A becomes point C due to extraction of 10 kg / s. When the opening of the fuel flow rate adjustment valve 35 is adjusted and the turbine inlet temperature is kept constant (1,000 ° C. in FIG. 2), the operating point of the gas turbine device is point B.

  In order to perform 10 kg / s extraction while keeping the compressor outlet pressure P2 of the gas turbine apparatus operating at point A constant at 1.3 MPa, the operation from point A to point D shown in FIG. You can see that

That is, the external equipment 8 is 10 kg / s, when in need of extracted air of 1.3MPa by calculating the gas turbine inlet mass flow rate G3, the gas turbine after extraction from (Equation 3) inlet mass flow rate G3 I know. The opening of the fuel flow control valve 35 is kept constant, the extraction air shutoff valve 41 is fully closed, and the extraction flow control valve 43 is opened to perform extraction. As a result, the extraction flow rate becomes a predetermined mass flow rate, but the pressure decreases. Here, the target gas turbine outlet temperature T4 ′ after bleed for raising to the pressure of the bleed air required by the external equipment can be calculated from ( Formula 3 ), and the bleed air required by the external equipment can be calculated from ( Formula 2 ). It is possible to calculate the gas turbine inlet temperature T3 ′ after bleed for raising the pressure to If the gas turbine inlet temperature T3 ′ after extraction is equal to or lower than the maximum inlet temperature allowed by the gas turbine, the gas turbine inlet temperature T3 ′ obtained from (Equation 2) is obtained until the extraction pressure reaches 1.3 MPa. In this way, the bleed flow control valve 43 is controlled so that the bleed mass flow rate becomes constant at the same time as the opening of the fuel flow rate adjustment valve 35 is gradually opened. By this operation, 10 kg / s, 1.3 MPa bleed air required by the external equipment 8 is discharged from the bleed bleed duct 10 to the atmosphere. Supply to the external equipment 8 is performed by gradually closing the extraction flow control valve 43 after opening the extraction air cutoff valve 41 to equalize the pressure before and after the extraction air cutoff valve 41.

Calculate the gas turbine inlet temperature T3 ′ from (Equation 2), and if the gas turbine inlet temperature T3 ′ after bleed is equal to or higher than the maximum inlet temperature allowed by the gas turbine, increase the fuel flow rate to increase the gas turbine inlet temperature. It may not be possible to obtain the bleed air having a predetermined flow rate and pressure only by raising it. For this reason, in this embodiment, in addition to the increase in the fuel flow rate, the opening degree of the inlet guide vane 1 at the inlet of the compressor 2 is opened to increase the compressor inlet mass flow rate. As a result, the turbine inlet mass flow rate G3 increases and the compressor outlet pressure P2 increases. In this case, from the turbine inlet mass flow rate G3, the extraction flow rate Gex, and the fuel flow rate increase obtained from Equation 3, an increase in the compressor inlet mass flow rate associated with the opening change of the inlet guide vane 1 can be calculated.

  The same operation method is used when the opening degree of the inlet guide vane 1 is opened first to increase the compressor inlet mass flow rate, thereby increasing the turbine inlet mass flow rate G3 to increase the compressor outlet pressure P2. Can do.

  Further, from the measurement result of the compressor outlet pressure P2 and the gas turbine outlet temperature T4, the turbine inlet mass flow rate G3 is sequentially calculated, and the opening degree of the inlet guide vane 1 and the fuel flow rate are controlled to be optimal, and a predetermined extraction Flow rate and extraction pressure can be obtained.

  In the present embodiment, an inlet guide vane is shown as an example of a general device for changing the compressor inlet flow rate of the gas turbine apparatus, but there is a variable stator vane of the compressor as a similar device. It is clear that the same effect as the example can be obtained. In the description of the present embodiment, the actual flow rate of kg / s is used as the turbine inlet mass flow rate for the sake of simplicity, but the same effect can be obtained even when the relative flow rate is converted from kg / s to%. In this case, the actual flow rate at the turbine inlet can be obtained from the relative flow rate and the measured bleed mass flow rate.

  Here, in particular, an oxygen-oxidized coal gasification combined power plant that supplies extracted air as raw material air to an air separation facility, produces oxygen, and supplies the oxygen as a gasifying agent to a coal gasifier In the process, the auxiliary raw material air compressor is operated, and the raw material air generated from this is used, and then the raw material air is switched to gas turbine bleed air for use. Further, in the stop process, it is necessary to switch the raw material air from the gas turbine bleed air to the auxiliary raw material air compressor. In such a case, the flow rate and pressure of the extracted air extracted from the gas turbine compressor and the source air supplied from the source air compressor are the same in order to suppress fluctuations in the pressure in the air separation facility during the switching process. It was hoped that it would be switched after it was made.

  According to the present embodiment described above, it is possible to predict the operation state when the extraction air of the required flow rate and pressure is extracted, so it is determined whether the required flow rate and pressure extraction can be performed. can do. In this embodiment, since the mass flow rate and pressure of the air extracted from the compressor outlet can be adjusted, the gas from the air of the auxiliary air compressor is matched with the air pressure and flow rate required by the external equipment. Switching to the extracted air of the turbine is possible, and the pressure fluctuation in the external equipment can be suppressed.

  Hereinafter, another embodiment of the present invention will be described with reference to FIG. The description of the same configuration as that in FIG. 1 is omitted. In this embodiment shown in FIG. 3, the heat recovery equipment 11 in FIG. 1 is used as an exhaust heat recovery boiler, and a steam supply pipe 60 for supplying the steam generated in the heat recovery equipment 11 to the combustor 3 is installed. A steam supply shut-off valve 62 and a steam flow control valve 61 are installed at 60.

  In the above configuration, when the extraction of the extraction pipe A23 is started from the outlet of the compressor 2, the extraction pressure is reduced. Therefore, in this embodiment, the steam supply cutoff valve 62 is opened and the opening of the steam flow control valve 61 is adjusted to supply steam to the gas turbine combustor 3. As a result, the mass flow rate at the inlet of the gas turbine 4 increases, the compressor outlet pressure increases, and a predetermined extraction pressure can be obtained. If steam is supplied near the combustion burner of the combustor 3, there is an effect of suppressing the peak temperature of combustion and reducing the generation of NOx. However, if the steam supply amount increases, the combustion becomes unstable. For this reason, when supplying a large amount of steam, the steam supply destination is between the combustor 3 and the gas turbine 4, or between the compressor 2 and the combustor 3, and the combustion air and steam after extraction are mixed in advance. It is also possible to make it.

  The same effect can be obtained by supplying nitrogen and carbon dioxide to the combustor 3 instead of steam.

  According to this embodiment, not only the generation of NOx can be suppressed, but also the mass flow rate at the inlet of the gas turbine 4 can be increased by the medium supplied from the outside.

  Next, another embodiment of the present invention will be described with reference to FIG. In this embodiment, a liquid fuel tank 68, a liquid fuel pump 67, a liquid fuel pipe 65, and a liquid fuel control valve 66 are installed in addition to the embodiment of FIG.

In the embodiment of FIG. 1, the fuel flow control valve 35 is opened to increase the fuel supply amount in order to compensate for the decrease in the compressor 2 outlet pressure due to bleed air. However, when the fuel supply amount is limited, the fuel supply amount cannot be increased. Specifically, as shown in the prior art, oxygen-oxidized coal gas that supplies extracted air as raw air to an air separation facility, produces oxygen, and supplies the oxygen as a gasifying agent to a coal gasifier A fuel gas supply facility 9 is used when operating an auxiliary raw material air compressor in the start-up process and using the raw material air generated thereby in the combined power plant, and then switching the raw material air to gas turbine extraction. There is a limit to the amount of fuel supplied from the coal gasifier.

  Therefore, in this embodiment, a liquid fuel tank 68, a liquid fuel pump 67, a liquid fuel pipe 65, and a liquid fuel control valve 66 are installed as auxiliary fuel equipment, and the liquid fuel control valve 66 is used as means for increasing the gas turbine outlet temperature T4. And the auxiliary liquid fuel is supplied from the liquid fuel tank 68 to the combustor 3. According to this embodiment, there is an effect that the pressure of the extraction air can be adjusted by using the auxiliary fuel regardless of the restriction of the main fuel flow rate.

1 is a system diagram of a gas turbine apparatus according to an embodiment of the present invention. The figure which shows a gas turbine apparatus operating point. The figure which shows the other Example of this invention. The figure which shows the other Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Inlet guide vane, 2 ... Compressor, 3 ... Combustor, 4 ... Gas turbine, 6 ... Extraction air cooler, 7 ... Air / water separator, 8 ... External equipment of extraction air supply destination, 9 ... Fuel gas supply Equipment 23 ... Extraction piping A, 35 ... Fuel flow control valve, 41 ... Extraction air shut-off valve, 43 ... Extraction flow control valve, 50 ... Compressor outlet pressure gauge, 52 ... Gas turbine exhaust thermometer, 60 ... Steam supply piping 61 ... Steam flow rate control valve, 65 ... Liquid fuel piping, 66 ... Liquid fuel control valve, 68 ... Liquid fuel tank.

Claims (8)

In a gas turbine device that supplies air extracted from a compressor to external equipment,
When bleed from the compressor to the external equipment , before supplying the bleed air to the external equipment, the same amount as the bleed flow rate to the external equipment is released to the atmosphere via the bleed flow control valve. Decreasing the compressor outlet pressure, and increasing the flow rate of fuel supplied to the gas turbine using the pressure as a target value until the reduced compressor outlet pressure reaches the compressor outlet pressure required by the external equipment. Then, the extraction flow control valve is closed and the extraction air is supplied to the external equipment. In a gas turbine device that supplies air extracted from a compressor to external equipment,
When bleed from the compressor to the external equipment , before supplying the bleed air to the external equipment, the same amount as the bleed flow rate to the external equipment is released to the atmosphere via the bleed flow control valve. An inlet guide installed at the inlet of the compressor with the pressure as a target value until the compressor outlet pressure is reduced and the reduced compressor outlet pressure reaches the compressor outlet pressure required by the external equipment. After controlling the opening of the blades or the variable stationary blades of the compressor to increase the compressor inlet flow rate, the extraction flow rate control valve is closed to supply the extraction air to the external equipment. A gas turbine device that is characterized. The means for increasing the compressor outlet pressure further includes a system for supplying steam, nitrogen, or carbon dioxide from the outside to the flow path between the compressor and the gas turbine of the gas turbine apparatus. The gas turbine apparatus according to claim 2 .   The gas turbine apparatus according to claim 1, wherein an auxiliary fuel supply apparatus is provided separately from a fuel supply apparatus that supplies fuel to the gas turbine apparatus. A compressor that compresses air; a combustor that combusts the compressed air and fuel; a gas turbine that is driven by the combustion exhaust gas of the combustor;
A fuel gas supply facility for supplying fuel to the combustor, and a fuel pipe having a fuel flow rate adjusting valve for adjusting a flow rate of fuel supplied from the fuel gas supply facility to the combustor;
An extraction pipe for extracting air from the compressor outlet and supplying the external equipment using the extracted air;
A bleed air shut-off valve that is provided in the bleed piping and shuts out the bleed air supplied to the external equipment;
A bleed pipe E branching from the bleed pipe and discharging the bleed air to the outside, and a bleed flow control valve for controlling the flow rate of the bleed air flowing through the bleed pipe E ,
When bleed from the compressor, the bleed air shut-off valve is closed and the bleed flow control valve is opened, and the pressure is set as a target value until the bleed pressure required by the external equipment using the bleed air is reached. The fuel flow rate control valve is opened to increase the flow rate of fuel supplied to the gas turbine, the compressor outlet pressure that has decreased after bleed is increased, the bleed flow rate control valve is closed, and the bleed air shut-off valve is opened. A gas turbine apparatus configured to supply extracted air to the external equipment. The gas turbine apparatus includes an inlet guide vane that adjusts an air flow rate taken into the compressor, and a variable vane that makes the compressor vane variable.
When the gas turbine inlet temperature exceeds the allowable temperature by increasing the flow rate of fuel supplied to the combustor, the opening amount of the inlet guide vane or variable stationary vane is adjusted to increase the compressor inlet mass flow rate. The gas turbine apparatus according to claim 5, wherein the compressor outlet pressure is increased. In the extraction operation method of the gas turbine device for supplying the air extracted from the compressor to the external equipment,
Prior to supplying the extraction air from the compressor to the external equipment, the same amount as the extraction flow to the external equipment is extracted through the extraction flow control valve and released to the atmosphere to reduce the compressor outlet pressure. ,
The extraction before and after the gas turbine outlet temperature, the bleed air around the compressor outlet pressure, based on the gas turbine inlet mass flow rate before the extraction, to calculate the gas turbine inlet mass flow rate after bled from the compressor, it said bleed The target gas turbine inlet temperature for increasing the compressor outlet pressure, which is reduced by the above, to the extraction air pressure required by the external equipment is calculated, and the flow rate of fuel supplied to the gas turbine combustor is calculated as the target gas turbine inlet temperature. after increasing to the fuel flow rate as a bleed method of operating a gas turbine apparatus and supplying the bleed air to the external equipment by closing the bleed flow control valve. Bleed operation how the gas turbine apparatus, wherein, when the gas turbine inlet temperature by the increase of the fuel flow rate supplied to the combustor is equal to or higher than the allowable temperature, the opening of the inlet guide vanes or variable stator vanes of the compressor The bleed operation method of a gas turbine device according to claim 7, wherein the compressor outlet pressure is increased by adjusting and increasing the compressor inlet mass flow rate.

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