JP2011202521A - Intake system, gas turbine having the intake system, and power generation plant having the gas turbine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake system capable of improving the efficiency of a gas turbine and reducing a maintenance and management cost, and also provide a gas turbine having the intake system and a power generation plant having the gas turbine.SOLUTION: This intake system includes a flow passage 4 for guiding a fluid to a compressor, liquid spraying means 2 for spraying a liquid toward the fluid guided into the flow passage 4, an inlet temperature measure for measuring the intake temperature of the fluid guided into the flow passage 4, an inlet humidity measure for measuring the intake humidity of the fluid guided into the flow passage 4, an inlet pressure measure for measuring the intake pressure of the liquid guided into the flow passage 4, and an inlet fluid monitor 21 for monitoring the state of the liquid sprayed toward the fluid. The liquid sprayer 2 is characterized in that the flow is controlled so that the liquid sprayed using the intake temperature, intake pressure, and the intake humidity of the fluid is equal to or less than the saturated state when the liquid monitored by the inlet fluid monitor 21 is not vaporized.

Description

  The present invention relates to an intake system, a gas turbine including the intake system, and a power plant including the intake system, and more particularly to spraying air introduced into a compressor.

  In general, when the outside air temperature rises, the output of the gas turbine decreases because the air becomes lean. In order to recover the output of the gas turbine, a mist spray intake cooling system is used in which water is sprayed on the air guided to the compressor and the temperature of the air is lowered by the heat of vaporization. Thereby, the density of the air led to the compressor increases and the efficiency of the compressor is improved (for example, Patent Document 1, Patent Document 2, and Patent Document 4 to Patent Document 6).

  In Cited Document 3, water is sprayed on the air compressed by the compressor, the amount of moisture in the air supplied to the combustor is increased, the flow rate of the combustion gas of the turbine is increased, and the power generation efficiency is improved. A gas turbine power plant is disclosed.

JP 2008-175149 A Japanese Patent No. 3854156 Japanese Patent Laid-Open No. 11-324710 JP 2002-195053 A JP-A-9-303160 US Patent Application Publication No. 2009/0038313

  However, the invention described in Patent Document 4 is a two-fluid nozzle system in which water sprayed on air is sprayed using compressed air, and the invention described in Patent Document 5 uniformly distributes water droplets sprayed on air. Therefore, the sprayed droplets may be drained or coarsened and collide with the compressor blades to cause erosion or peeling of the coating. For this reason, there is a problem that the maintenance period of the gas turbine is expensive because it is necessary to shorten the inspection period of the compressor and secure spare parts.

The present invention has been made in view of such circumstances, and an intake system capable of preventing droplets in a fluid guided to a compressor from being drained or coarsened, and a gas turbine provided with the intake system And it aims at providing a power plant provided with this.
According to the present invention, the periodic inspection interval is extended, the life cycle cost of the power plant is reduced, the fuel consumption is reduced by improving the operation rate and increasing the peak power generation amount, and the life cycle CO ₂ emission amount of the power plant is reduced. .
According to the present invention, the intake air supply state during operation of the power plant is remotely monitored by visualization, and damage to the equipment due to human error is prevented in advance.
According to the present invention, the maximum possible amount of power generation is predicted based on long-term weather forecast information for the construction of an energy security management system based on root cause analysis (RCA), risk assessment, and impact analysis.
Based on risk communication activities for reducing heat island phenomenon with local residents through effective use of electric power, dissemination of electric power supply to future electric vehicles, water surface increase business, river lake water purification business, seawater desalination business, and greening business To contribute.

In order to solve the above problems, an intake system, a gas turbine including the intake system, and a power plant including the intake system of the present invention employ the following means.
That is, according to the intake system of the present invention, the flow path for guiding the fluid to the compressor, the liquid spraying means for spraying the liquid opposite to the fluid guided into the flow path, and the flow path are guided. Inlet temperature measuring means for measuring the outside air temperature of the fluid, Inlet humidity measuring means for measuring the outside air humidity of the fluid guided to the flow path, and Inlet pressure for measuring the outside air pressure of the fluid guided to the flow path Measuring means and inlet fluid monitoring means for monitoring the state of the liquid sprayed on the fluid, the liquid spraying means, when the liquid monitored by the inlet fluid monitoring means is not evaporated, The flow rate is controlled so that the liquid to be sprayed is brought into a saturated state or less using the outside air temperature, the outside air pressure, and the outside air humidity.

  When the liquid monitored by the inlet fluid monitoring means has not evaporated, the amount of liquid sprayed against the fluid introduced to the compressor is saturated using the outside air temperature, outside air pressure, and outside air humidity. It was decided to control to be as follows. Therefore, the temperature of the fluid that has passed through the flow path can be lowered by the heat of vaporization when the sprayed fluid is vaporized. In addition, the fluid guided into the flow path is sprayed with a liquid so as to face the flow. Therefore, when the fluid passes through the sprayed liquid, the liquid contained in the fluid can be sufficiently evaporated between the compressor and the flow path. Therefore, the density of the fluid guided to the compressor can be increased, and the liquid can be prevented from coarsening and colliding with the device provided in the flow path.

  Further, the corrosive component in the fluid is adsorbed to the liquid by passing through the flow path in which the liquid is sprayed. Thereby, a corrosion component coarsens. Therefore, the corrosive component led to the compressor can be easily captured.

  Further, according to the intake system of the present invention, the intake temperature measuring means provided at the inlet of the compressor for measuring the intake temperature of the fluid led to the compressor, and provided at the inlet of the compressor. An intake humidity measuring means for measuring the intake humidity of the fluid led to the compressor, and an intake pressure measuring means for measuring the intake pressure of the fluid led to the compressor provided at the inlet of the compressor And an intake speed measuring means for measuring the intake speed of the fluid guided to the compressor, and a rotation provided for the compressor for measuring the rotational speed of the compressor. Number measuring means, and intake fluid monitoring means provided at the inlet of the compressor and monitoring the state of the fluid guided to the compressor, the liquid spraying means by the intake fluid monitoring means The liquid in the monitored fluid evaporates If not, characterized in that the flow rate of the liquid to be sprayed using the intake temperature and the intake humidity the intake pressure and the intake speed and the rotational speed is controlled.

  When the liquid in the fluid monitored by the intake fluid monitoring means has not evaporated, the intake temperature, intake humidity, intake pressure of the fluid inlet to the compressor and the fluid introduced to the compressor The flow rate of the liquid sprayed by the liquid spraying means is controlled using the intake speed of the compressor and the rotational speed of the compressor. Therefore, the dew point condition of the inlet of the compressor of the fluid led to the compressor can be controlled according to the rotation speed of the compressor. Therefore, it is possible to increase the density of the fluid guided to the compressor, and it is possible to prevent condensation from occurring in the compressor.

  Furthermore, according to the intake system according to the present invention, the outside air temperature, the outside air humidity, and the outside air pressure are obtained from weather information.

  The outside air temperature, outside air humidity, and outside air pressure were determined based on the weather information. Therefore, the spray amount can be set in advance.

  Further, according to the gas turbine of the present invention, the compressor provided with any one of the intake systems described above, a combustor that burns fuel and discharges exhaust gas, and is rotated by the exhaust gas discharged from the combustor. It has a turbine driven, and a turbine shaft connecting between the turbine and the compressor.

  The density of the fluid guided to the compressor can be increased, and a compressor having an intake system that can prevent condensation in the flow path and the compressor is used. Therefore, it is possible to prevent damage to equipment and the compressor provided in the flow path due to condensation. Therefore, the soundness of the operation of the gas turbine can be improved and the turbine efficiency can be improved.

  Furthermore, the power plant according to the present invention is characterized by including the gas turbine described above.

  A gas turbine that can improve the soundness of the operation of the gas turbine and improve the turbine efficiency is used. Therefore, the soundness of the operation of the power plant can be improved and the power generation efficiency can be improved.

  When the liquid monitored by the inlet fluid monitoring means has not evaporated, the amount of liquid sprayed opposite to the fluid guided to the compressor is controlled using the outside air temperature, the outside air pressure, and the outside air humidity. It was decided. Therefore, the temperature of the fluid that has passed through the flow path can be lowered by the heat of vaporization when the sprayed fluid is vaporized. In addition, the fluid guided into the flow path is sprayed with a liquid so as to face the flow. Therefore, when the fluid passes through the sprayed liquid, the liquid contained in the fluid can be sufficiently evaporated between the compressor and the flow path. Therefore, the density of the fluid guided to the compressor can be increased, and the liquid can be prevented from coarsening and colliding with the device provided in the flow path.

1 is a schematic configuration diagram of an intake system provided in a gas turbine of a power plant according to a first embodiment of the present invention. It is a schematic block diagram of the gas turbine of the power plant provided with the intake system which concerns on 2nd Embodiment of this invention.

[First Embodiment]
FIG. 1 shows a schematic configuration diagram of an intake system provided in a gas turbine of a power plant according to a first embodiment of the present invention.
The intake system 1 includes a duct (flow path) 4 that guides air (fluid) to a gas turbine (not shown), and a plurality of nozzles (liquid spray means) 2 that spray pure water (liquid) onto the air in the duct 4. An inlet fluid borescope (inlet fluid monitoring means) 21 for monitoring the state of air sprayed with pure water by the nozzle 2, an inlet thermometer (inlet temperature measuring means) for measuring the outside air temperature, An inlet hygrometer (inlet humidity measuring means) for measuring the outside air relative humidity and an inlet pressure gauge (inlet pressure measuring means) for measuring the outside air pressure are provided.

  The gas turbine is driven by an air compressor (compressor) (not shown) that compresses intake air, a combustor (not shown) that combusts fuel and discharges exhaust gas, and exhaust gas discharged from the combustor. A turbine (not shown) and a turbine shaft (not shown) to which the air compressor and the turbine are connected are provided.

  A duct 4 is connected to an inlet of an air compressor (not shown). The duct 4 has an intake filter (not shown) and an intake silencer (not shown) inside thereof. Outside air (hereinafter referred to as “air”) is guided to the air compressor through an intake filter and an intake silencer. The air guided to the air compressor is compressed when the air compressor rotates.

  The turbine is driven to rotate by introducing exhaust gas. A turbine shaft connected to the air compressor is connected to the turbine. The turbine shaft is rotationally driven when the turbine is rotationally driven by the exhaust gas. When the turbine shaft is rotationally driven, the air compressor is rotationally driven to compress the air. The turbine shaft connects between the air compressor and the turbine.

  In the combustor, the air compressed by the air compressor is guided to burn the fuel. A combustor discharges exhaust gas by burning fuel and air compressed by an air compressor.

  A duct 4 is connected to the inlet side of the air compressor. The duct 4 is one in which air is introduced into the duct 4. The shape of the duct 4 is a shape and dimension based on heat flow analysis calculation, and the shape is such that the pure water sprayed on the air guided into the duct 4 by the nozzle 2 described later can be evaporated almost completely. . An intake filter is provided on the inlet side of the duct 4 into which air is introduced. The intake filter removes foreign substances in the air guided into the duct 4.

  An intake silencer (not shown) is provided between the intake filter and the air compressor. The intake silencer is provided in a duct 4 on the downstream side of the nozzle 2 described later. The intake silencer includes an internal sound absorbing material (not shown) therein. Thereby, the intake silencer absorbs the air sound guided into the duct 4.

  The duct 4 has a bent portion 4a that bends 90 ° (downward in FIG. 1) with respect to the extending direction of the duct 4 at a midway position in the extending direction. A rectifying device 12 that rectifies the flow of air flowing through the duct 4 is provided in the duct 4 of the bent portion 4a.

  The duct 4 is provided with a plurality of nozzles 2 on a nozzle installation surface 4b described later. The duct 4 is downstream from the nozzle installation surface 4b by a distance L, and is parallel to the nozzle installation surface 4b (hereinafter referred to as "inlet fluid monitoring means installation surface") 4c at the center of the inlet described later. A fluid borescope 21 is provided.

  In a region (hereinafter referred to as “complete evaporation region”) 11 from the nozzle installation surface 4b of the duct 4 to the inlet fluid monitoring means installation surface 4c, pure water in the air led here is completely evaporated. It is assumed that the distance L is sufficient. The complete evaporation region 11 is provided on the upstream side of the bent portion 4a described above. The complete evaporation region 11 is set to a distance L corresponding to the outside air condition (design condition) set at the design stage of the duct 4.

The nozzle 2 sprays pure water onto the air sucked by the air compressor. A plurality of nozzles 2 are provided in the duct 4 (only four locations are shown in FIG. 1). Pure water in the pure water supply tank 6 is boosted and supplied to each nozzle 2 by a pure water supply pump 5. The pure water sprayed on the air in the duct 4 by the nozzle 2 has a particle diameter of 10 μm to 20 μm.
The flow velocity sprayed from each nozzle 2 is 100 m / sec or higher, and the spray spread angle α from each nozzle 2 does not interfere with each other. Therefore, the individual fine particles collide with air and the surface shape is spherical. Destructive deformation further expands the evaporation surface area and promotes complete evaporation.

  In the duct 4, for example, four nozzles 2a, 2b, 2c, and 2d are provided. The nozzles 2a, 2b, 2c, and 2d are provided on a surface (hereinafter referred to as “nozzle installation surface”) 4b that is perpendicular to the direction in which the duct 4 extends. In the nozzles 2 b and 2 c, each spray hole (not shown) faces the inlet side of the duct 4 so as to spray pure water in a direction opposite to the flow of air flowing into the duct 4. In the nozzles 2a and 2d provided in the vicinity where the wall portions constituting the duct 4 are adjacent to each other, each spray hole is inclined toward the inlet side of the duct 4 and the central axis direction of the longitudinal direction of the duct 4 It is provided to be in the direction. That is, the nozzles 2 a and 2 d are provided toward the inside of the duct 4 so that the spray spread angle is α with respect to the longitudinal direction of the duct 4.

  Thus, since the pure water sprayed from the nozzles 2a, 2b, 2c, and 2d is sprayed opposite to the air flow flowing into the duct 4, the sprayed pure water flows in the duct 4. Will be stirred. Therefore, between the inlet of the duct 4 and the nozzle installation surface 4b, the sprayed water droplets of the pure water stay while being swirled minutely. The spray spread angle α of the nozzles 2 a and 2 d is an angle at which pure water sprayed in opposition to the air flow in the duct 4 can flow in the duct 4.

  The inlet fluid borescope 21 monitors the state of air containing pure water in the duct 4. The inlet fluid borescope 21 is provided at the center of the inlet fluid monitoring means installation surface 4c. The state of the air imaged (monitored) by the inlet fluid borescope 21 is determined by a control device (not shown) whether pure water in the air is sufficiently evaporated or insufficiently evaporated.

  An inlet thermometer (not shown), an inlet hygrometer (not shown), and an inlet pressure gauge (not shown) are provided outside the duct 4. The inlet thermometer measures the temperature of the outside air (outside air temperature). The inlet hygrometer measures the relative humidity (outside air humidity) of outside air. The inlet pressure gauge measures the pressure of outside air (outside air pressure).

A control device (not shown) is provided outside the duct 4. The control device controls the flow rate of pure water sprayed from the nozzle 2 to the air guided into the duct 4 using the measured outside air temperature, outside air humidity, and outside air pressure. Further, the control device determines the state of the air imaged by the pure fluid of the inlet fluid borescope 21 and adjusts the flow rate of the pure water discharged from the pure water supply pump 5 according to the determination result.
The control device is used for supplying the pure water or for increasing the spray pressure due to a sudden drop in the spray pressure due to an abnormality such as when the air compressor is stopped or when the nozzle 2 is broken or when the nozzle 2 is blocked. An interlock mechanism (not shown) that stops the supply of pure water to the nozzle 2 when the pump 5 is abnormal is provided.

Next, the flow of air guided to the air compressor will be described.
As the fuel is burned by the combustor, the turbine is driven to rotate. The turbine shaft is rotationally driven by rotationally driving the turbine. Since the turbine shaft is rotationally driven, the air compressor connected to the turbine shaft is rotationally driven. When the air compressor is driven to rotate, outside air is sucked into the duct 4 through the intake filter.

  The air sucked into the duct 4 is guided from the inlet of the duct 4 to the nozzle installation surface 4b. Between the inlet of the duct 4 and the nozzle installation surface 4b, water droplets of pure water sprayed by the nozzle 2 stay. Therefore, the air led from the inlet of the duct 4 to the nozzle installation surface 4b contains water droplets.

  The air containing the water droplets is guided to the complete evaporation region 11 on the downstream side of the nozzle installation surface 4b. In the air containing water droplets guided to the complete evaporation region 11, pure water is sufficiently evaporated while passing through the complete evaporation region 11. When pure water evaporates, the temperature of the air decreases due to the heat of vaporization. As the temperature of the air decreases, the density of the air increases. The flow of the air whose density has been increased is rectified by the rectifying device 12 provided in the bent portion 4 a on the downstream side of the complete evaporation region 11. Further, since the rectifying device 12 is bent so as to be along the bent portion 4a of the duct 4, the air is rectified and the flow direction is changed (in FIG. 1, it flows from the upward flow to the right).

  The increased density air rectified by the rectifier 12 is directed to the air compressor. An air compressor compresses air with increased density. The compressed air discharged from the air compressor is guided to the combustor. The compressed air led to the combustor is burned together with the supplied fuel to become combustion gas.

Next, control of the spray amount of pure water sprayed on the air guided to the air compressor will be described.
Using the outside air temperature, outside air humidity, and outside air pressure measured by the inlet thermometer, the inlet hygrometer, and the inlet pressure gauge provided outside the duct 4, the control device supplies pure water. The flow rate of pure water discharged from the industrial pump 5 is adjusted. The control device adjusts the flow rate of the pure water discharged by the pure water supply pump 5 so that the air containing pure water that has passed through the nozzle installation surface 4b does not exceed the saturation state and does not exceed the saturation state.

  The air containing pure water passes through the nozzle installation surface 4 b and is guided to the complete evaporation region 11 in the duct 4. Here, the complete evaporation region 11 formed between the nozzle installation surface 4 b and the inlet fluid monitoring means installation surface 4 c separated from the nozzle installation surface 4 b is a condition of the outside air set in the design stage of the duct 4. It is set as a distance L corresponding to (design condition). Therefore, after the duct 4 is installed, if the design conditions are not satisfied due to an abnormality of the device, an increase in spray particle diameter due to deterioration of the nozzle 2 over time, deterioration of the spray water quality, or the like, The pure water may not evaporate sufficiently.

  Therefore, the state of air that has passed through the complete evaporation region 11 is constantly monitored by the inlet fluid borescope 21. If the control device determines that the pure water in the air has not sufficiently evaporated from the state of the air being imaged (monitored) using the inlet fluid borescope 21, the pure water supply pump 5 Adjust the flow rate of the pure water to be discharged.

  As described above, the control device adjusts the flow rate discharged from the pure water supply pump 5 by the outside air temperature, the outside air humidity, and the outside air pressure, and then changes the state of the air that has passed through the complete evaporation region 11 to the inlet fluid borescope 21. The pure water supply pump 5 is further adjusted according to the evaporation state of the pure water in the air. This prevents deionized water in the air from condensing into the duct 4 on the downstream side from the complete evaporation region 11. Moreover, by spraying water onto the air from the nozzle 2, the temperature of the air can be lowered using the heat of vaporization when the water evaporates (vaporizes), and the air with increased density can be guided to the air compressor. .

As described above, according to the intake system according to the present embodiment, the gas turbine including the intake system, and the power plant including the gas turbine, the following operational effects can be achieved.
When pure water (liquid) in the air (fluid) imaged (monitored) by the inlet fluid borescope (inlet fluid monitoring means) 21 is not sufficiently evaporated, the outside air temperature, the outside air pressure, The flow rate (amount) of pure water sprayed opposite to the air guided to the air compressor (compressor) was controlled using the outside air humidity. Therefore, the temperature of the air passing through the duct (flow path) 4 can be lowered by the heat of vaporization sprayed with pure water, and the sprayed pure water can be sufficiently evaporated in the duct 4. Therefore, the density of the air guided to the air compressor can be increased, and the pure water droplets contained in the air are coarsened (condensation) in the equipment (not shown) provided in the duct 4. ) To avoid collision.

  The corrosive component contained in the air is adsorbed to the pure water by passing through the duct 4 sprayed with the pure water. Thereby, a corrosion component coarsens. Therefore, corrosive components in the air guided to the air compressor can be easily captured.

  The air intake system 1 that can increase the density of the air guided to the air compressor and can prevent condensation in the duct 4 is used. Therefore, damage to equipment provided in the duct 4 due to condensation can be prevented. Accordingly, the turbine efficiency can be improved and the soundness of the operation of the gas turbine can be improved.

  A gas turbine capable of improving the soundness of operation and improving the turbine efficiency was used. Therefore, the soundness of the operation of the power plant can be improved and the power generation efficiency can be improved.

In the present embodiment, the inlet fluid borescope 21 is used as the inlet fluid monitoring means. However, the present invention is not limited to this, and the state of pure water contained in the air is described. Anything that can be constantly monitored is acceptable.
In addition, the inlet temperature measuring means, the inlet humidity measuring means, and the inlet pressure measuring means have been described as using an inlet thermometer, an inlet hygrometer, and an inlet pressure gauge, but the present invention is not limited to this. Any device that can measure the temperature, relative humidity, and pressure of the outside air can be used.
When the power plant is started up rapidly in a short time, the spray amount of pure water required may be calculated in advance according to the planned increase curve of the intake flow rate, and the spray may be controlled in a planned manner.

In addition, the duct 4 has been described as having the bent portion 4a that bends 90 ° downward, but the present invention is not limited to this, and the bent portion 4a extends obliquely or laterally. It is good as well.
Further, although the nozzle 2 has been described as spraying pure water, a substance other than pure water may be used.
Prevents supersaturated operation of pure water and prevents submersion of air compressors and other equipment due to excessive spraying of pure water.
A fail-safe and fool-proof configuration system that prevents unexpected spray stoppage by constantly monitoring the inlet fluid borescope 21 and the like.
The nozzle 2 is removable in a cold region to prevent freezing.
In a dry region or a high temperature region, an additional filter is installed at the inlet of the duct 4 on the upstream side of the nozzle 2 in order to prevent sand dust from entering the duct 4 due to the occurrence of sandstorm.
It can be removed even during long-term power plant outages.
Each component device shall be structured and arranged so that it can be inspected and replaced quickly.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described. The intake system of the present embodiment, the gas turbine equipped with the intake system, and the power plant equipped with the intake system are different from those of the first embodiment in that the flow rate sprayed by the nozzle is controlled by monitoring the air at the inlet of the air compressor. The other is the same. Therefore, the same configuration, the same flow, and the same control method are denoted by the same reference numerals and description thereof is omitted.

The schematic block diagram of the gas turbine of the power plant provided with the intake system which concerns on 2nd Embodiment of this invention is shown by FIG.
The intake system 1 measures a duct (flow path) 4 that guides air (fluid) to the gas turbine 10, a nozzle (liquid spray means) 2 that sprays pure water (liquid) onto the air in the duct 4, and an outside air temperature. An inlet thermometer 18 that measures the outside air relative humidity, an inlet pressure gauge 20 that measures the outside air pressure, and an intake thermometer that measures the intake air temperature at the inlet of the air compressor 9 ( Intake temperature measuring means) 13, an intake hygrometer (intake humidity measuring means) 14 for measuring the intake humidity at the inlet of the air compressor 9, and an intake pressure for measuring the intake pressure at the inlet of the air compressor 9. A meter (intake pressure measuring means) 15, a flow meter (intake speed measuring means) 16 that measures the flow velocity of air at the inlet of the air compressor 9, and a tachometer (rotation) that measures the number of revolutions of the air compressor 9 Number measuring means) 17.

  The gas turbine 10 includes an air compressor 9 that compresses intake air, a combustor 8 that combusts fuel and discharges exhaust gas, a turbine 7 that is driven by the exhaust gas discharged from the combustor 8, and an air compressor. 9 and a turbine shaft (not shown) to which the turbine 7 is connected.

  A control device (not shown) is provided outside the duct 4. The control device includes an outside air temperature measured by an inlet thermometer 18, an inlet hygrometer 19, and an inlet pressure gauge 20, an outside air humidity, and a dew point temperature of air sprayed with pure water from the outside air pressure. (Hereinafter referred to as “the dew point temperature in the duct”). In addition, the control device includes an intake air temperature, an intake humidity, and an intake pressure at the inlet of the air compressor 9 measured by the intake thermometer 13, the intake hygrometer 14, the intake pressure gauge 15, and the velocimeter 16. Then, the dew point temperature of the air led into the air compressor 9 (hereinafter referred to as “the dew point temperature in the air compressor”) is calculated from the intake speed. Further, the control device controls the opening degree of the pure water supply pump 5.

The intake thermometer 13, the intake hygrometer 14, the intake pressure gauge 15, and the flow velocity meter 16 are provided in the duct 4 in the vicinity of the inlet of the air compressor 9. The intake thermometer 13 measures the intake air temperature at the inlet of the air compressor 9. The intake hygrometer 14 measures the intake humidity at the inlet of the air compressor 9. The intake pressure gauge 15 measures the intake pressure at the inlet of the air compressor 9. The anemometer 16 measures the flow velocity of air at the inlet of the air compressor 9.
The tachometer 17 is provided in the air compressor 9. The tachometer 17 measures the rotation speed of the air compressor 9.

  The intake fluid borescope (intake fluid monitoring means) 21 monitors the state of air containing pure water in the duct 4 at the inlet of the air compressor 9. The intake fluid borescope 21 is provided at the center of the air compressor 9 in the vicinity of the inlet of the air compressor 9. The state of the air imaged (monitored) at the inlet of the air compressor 9 is caused by a collision between air close to a saturated state and a blade (not shown) of the air compressor 9 rotating at an ultra high speed by a control device (not shown). Then, it is monitored whether re-condensation occurs due to a sudden change in the state quantity of the inlet air in the boundary region.

  In the region of the boundary layer of air around the blades of the air compressor 9, the air pressure, the flow velocity, and the temperature conditions change rapidly, and the conditions for condensation also change. As the particle size of the dew condensation increases, the possibility of damaging each component device of the air compressor 9 increases. Therefore, the intake fluid borescope 21 is used to monitor the absence of condensation with a large particle size.

Next, control of the amount of pure water sprayed on the air guided to the air compressor will be described.
The control device uses an inlet fluid borescope (not shown) to adjust the flow rate discharged from the pure water supply pump 5 by the outside air temperature, outside air humidity, and outside air pressure, and then the state of the air that has passed through the complete evaporation region. The pure water supply pump 5 is further adjusted according to the evaporation state of the pure water in the air.

  As the air compressor 9 rotates, the air around the blades provided in the air compressor 9 changes in conditions such as the air guided from the duct 4, pressure, flow velocity, and temperature. Therefore, there is a possibility that condensation occurs in the air compressor 9.

  Therefore, the state of the air guided to the air compressor 9 by the intake fluid borescope 21 provided at the inlet of the air compressor 9 is constantly monitored. If the control device determines that the pure water in the air has not sufficiently evaporated from the state of the air being imaged (monitored) using the intake fluid borescope 21, the pure water supply pump 5 Adjust the flow rate of the pure water to be further reduced. The control device further reduces the flow rate of the pure water discharged by the pure water supply pump 5 until the pure water in the air imaged by the intake fluid borescope 21 is sufficiently evaporated.

As described above, according to the intake system according to the present embodiment, the gas turbine including the intake system, and the power plant including the gas turbine, the following operational effects can be achieved.
When pure water (liquid) in the air (fluid) imaged (monitored) by the intake fluid borescope (intake fluid monitoring means) 21 is not evaporated, the air compressor (compressor) 9 Using the intake air temperature, the intake humidity, the intake pressure of the air introduced into the air compressor 9, the intake speed of the air introduced into the air compressor 9, and the rotation speed of the air compressor 9, a nozzle (liquid spray Means) The flow rate (amount) of pure water sprayed by 2 is controlled. Therefore, the dew point condition of the inlet of the air compressor 9 for air guided to the air compressor 9 can be controlled according to the rotational speed of the air compressor 9. Therefore, the density of the air guided to the air compressor 9 can be increased, and condensation occurring in the air compressor 9 can be prevented.

[Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described. The intake system of this embodiment, the gas turbine equipped with the same, and the power plant equipped with the same differ from the first embodiment in that data obtained from weather information is used, and the others are the same. Therefore, the same configuration and the same flow are denoted by the same reference numerals and description thereof is omitted.

  The control device is a pump for supplying pure water using the outside air temperature, the outside air humidity, and the outside air pressure obtained from the weather information instead of the data obtained from the inlet thermometer, the inlet hygrometer, and the inlet pressure gauge. Controls the flow rate discharged by the.

As described above, according to the intake system according to the present embodiment, the gas turbine including the intake system, and the power plant including the gas turbine, the following operational effects can be achieved.
Based on the weather information, the outside air temperature, the outside air humidity, and the outside air pressure were determined. Therefore, the spray amount can be set in advance.

In addition, feedforward control is applied to predict sudden changes in weather and to change the setting value of the spray amount of pure water in advance.
Based on past weather information and power plant operation results, plan future operations and forecast demand.

1 Intake system 2 Nozzle (liquid spraying means)
4 Duct (flow path)
5 Pure water supply pump (liquid spraying means)
21 Borescope for inlet fluid (monitoring means for inlet fluid)

Claims (5)

A flow path for guiding fluid to the compressor;
A liquid spraying means for spraying a liquid opposite to the fluid guided into the flow path;
Inlet temperature measuring means for measuring the outside temperature of the fluid guided to the flow path;
Inlet humidity measuring means for measuring the outside air humidity of the fluid guided to the flow path;
An inlet pressure measuring means for measuring the outside air pressure of the fluid guided to the flow path;
An inlet fluid monitoring means for monitoring the state of the liquid sprayed on the fluid;
With
When the liquid monitored by the inlet fluid monitoring means has not evaporated, the liquid spraying means uses the outside air temperature, the outside air pressure, and the outside air humidity to bring the liquid to be sprayed into a saturated state or less. So that the flow rate is controlled. An intake air temperature measuring means provided at an inlet of the compressor for measuring an intake air temperature of a fluid guided to the compressor;
Intake humidity measuring means that is provided at the inlet of the compressor and measures the intake humidity of the fluid guided to the compressor;
An intake pressure measuring means provided at an inlet of the compressor for measuring an intake pressure of a fluid led to the compressor;
An intake speed measuring means which is provided at an inlet of the compressor and measures an intake speed of a fluid guided to the compressor;
A rotational speed measuring means provided in the compressor for measuring the rotational speed of the compressor;
An intake fluid monitoring means provided at an inlet of the compressor for monitoring a state of fluid guided to the compressor;
When the liquid in the fluid monitored by the intake fluid monitoring means has not evaporated, the liquid spraying means calculates the intake air temperature, the intake humidity, the intake pressure, the intake speed, and the rotation speed. The intake system according to claim 1, wherein the flow rate of the liquid to be sprayed is controlled.   The intake system according to claim 1 or 2, wherein the outside air temperature, the outside air humidity, and the outside air pressure are obtained from weather information. A compressor comprising the intake system according to any one of claims 1 to 3,
A combustor that burns fuel and discharges exhaust gas;
A turbine that is rotationally driven by exhaust gas discharged from the combustor;
A gas turbine having a turbine shaft connecting between the turbine and the compressor. A power plant comprising the gas turbine according to claim 4.

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