JP2002322916A - Cooling apparatus of gas turbine suction air - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling apparatus of gas turbine suction air to increase the output and prevent each blade of an air compressor from damaging by lessening the waterdrop diameter, and securely cooling the air when atomizing the water into the sucked air, and vaporizing the waterdrop after cooling of the air. SOLUTION: This cooling apparatus for the gas turbine suction air is provided with a suction air silencer 12 set in a suction chamber 1, an atomizer 11 arranged upper stream side of the suction air silencer 12 and atomizing the cooling water into the suction air, and a cooling water supplying system 14 supplying the cooling water to the atomizer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas turbine intake air cooling system for increasing the output by cooling air taken in a gas turbine.

[0002]

2. Description of the Related Art For example, in a combined cycle plant in which a gas turbine facility applied to a thermal power plant or a steam turbine facility and an exhaust heat recovery boiler are combined with a gas turbine facility, it is important to increase the power generation efficiency. ing.

[0003] This problem includes many research subjects, such as increasing the temperature of the combustion gas and securing the material strength associated with the higher temperature, and one of them is cooling the intake air.

[0004] In a gas turbine facility, the sucked air is compressed to a high temperature and a high pressure, fuel is added to the high pressure air to generate combustion gas, and the generated combustion gas flows through a turbine to perform expansion work. The generator is driven by the rotation torque generated at that time. It is well known that the output varies depending on the season or even the day.

The reason for this is that the amount of air taken in at that time is affected by the temperature. That is, the specific weight of air is a function of air temperature, and the higher the air temperature, the lower the specific weight.

Therefore, especially when the temperature in summer is high,
When the gas turbine is operated, the weight flow rate of the air sucked from the atmosphere becomes lower than the design value, and the output also decreases.

[0007] For this reason, recently, a so-called intake air cooling device has been proposed, in which a cooling device is provided on the inlet side of the air compressor, and the sucked air is cooled in advance by the cooling device and supplied to the gas turbine. Has also been applied.

[0008]

As a technique related to a recent intake air cooling device, there is Japanese Patent No. 2877098. In this technology, a spray device is provided downstream of a silencer, and air having a particle size of 5
Water droplets of 0 μm or less are sprayed to lower the temperature of air to increase the weight flow rate.

However, in this technique, since the spraying device is installed downstream of the silencer, it is difficult to always maintain the particle size of water droplets sprayed from the spraying device at 50 μm or less.

[0010] The air flowing through the intake chamber is not necessarily a uniform flow, but has a deviated flow and a swirling flow. For this reason, the water droplet sprayed from the spray equipment flows together with the drift flow and the swirling flow, and the water droplets gather together, and in some cases, a large water droplet may be formed. When this particle size is observed in detail, 50
Water droplets of more than μm are not few.

When the water droplets have a size of 50 μm or more, the water droplets directly collide with the air compressor casing and the moving blades and stationary blades of the air compressor because there is nothing obstructing the flow downstream of the spray device. I do. At that time, heat is removed from the metal that forms the wings, evaporating and evaporating, and the air is not cooled down.
By flowing to the outlet of the air compressor, the expected weight flow rate could not be obtained and did not sometimes contribute to an increase in gas turbine output.

Further, if the water droplets are sucked into the air compressor while the particle diameter is large, the anticorrosion coating material coated on each blade of the air compressor is gradually peeled off at the time of collision with each blade of the air compressor. May be caused. Further, a trace amount of impurities such as chlorine contained in the peeled water droplets may further damage or promote corrosion.

[0013] As described above, the conventional technique described in Japanese Patent No. 2877098 has several problems, and solving these problems leads to an increase in output.

The present invention has been made in view of such circumstances, and when spraying water droplets on the air to be taken in, the particle size of the water droplets is further reduced to ensure the cooling of the air and the air cooling. It is an object of the present invention to provide an intake cooling device for a gas turbine, which promotes vaporization of a later water droplet to increase output and prevent damage to each blade of an air compressor.

[0015]

According to a first aspect of the present invention, there is provided a gas turbine intake air cooling system, comprising: an intake silencer installed in an intake chamber; And a cooling water supply system for supplying water to the spray device by spraying water onto the sucked air to cool it.

According to a second aspect of the present invention, there is provided a gas turbine intake cooling system according to the present invention, wherein an intake silencer installed in an intake chamber and an upstream side of the intake silencer are provided. A spray device that is installed to spray and cool water into the sucked air, a cooling water supply system that supplies water to the spray device, and a downstream device that is installed downstream of the intake silencer to remove water droplets from the spray device And a water droplet removing device.

According to a third aspect of the present invention, there is provided a gas turbine intake air cooling system including an intake silencer installed in an intake chamber and an upstream side of the intake silencer. A spray device that is installed and sprays water to inhale the air to cool it, a cooling water supply system that supplies water to the spray device, and is installed upstream of the intake silencer and downstream of the spray device. , A water droplet removing device for removing water droplets from the spray device.

According to a fourth aspect of the present invention, there is provided a gas turbine intake cooling system according to the present invention, wherein the spraying device includes a water pipe connected to a plurality of manifolds, And a nozzle provided in the water pipe.

According to a fifth aspect of the present invention, there is provided a gas turbine intake cooling system according to the present invention, wherein a cooling water supply system includes a tank for storing first cooling water, A heat exchanger for cooling the first cooling water discharged from the tank with another second cooling water, and a flow control valve for controlling the first cooling water discharged from the heat exchanger.

In order to achieve the above object, in the gas turbine intake air cooling system according to the present invention, as described in claim 6, the heat exchanger is provided with another second cooling system for cooling the first cooling water. The cooling system for supplying the cooling water includes one of an on-off valve and a control valve.

According to a seventh aspect of the present invention, there is provided a gas turbine intake air cooling system, wherein a flow rate control valve includes a signal relating to an atmospheric temperature and a signal relating to a humidity of an intake chamber. A control device that calculates a signal based on at least one of a signal related to an air flow rate sucked into an intake chamber and a signal related to an output of a generator, and generates a valve opening / closing signal based on a result of the calculation. It is.

In order to achieve the above object, in the gas turbine intake cooling system according to the present invention, the cooling water supply system includes a plurality of cooling water supply systems connected to the spray device. A pump, a check valve, and an open / close valve are provided in each of the pipes and the plurality of cooling water supply pipes, and are arranged in order along the flow of the cooling water toward the spray device.

In order to achieve the above object, in the gas turbine intake air cooling apparatus according to the present invention, the pump is provided with a signal relating to the atmospheric temperature, a signal relating to the humidity of the intake chamber, A signal relating to the flow rate of the air sucked into the chamber, a signal relating to the output of the generator, and calculating based on at least one of the signals; Things.

In order to achieve the above object, in the gas turbine intake air cooling apparatus according to the present invention, as set forth in claim 10, the intake chamber is formed in a square shape, and spray devices are provided on three sides thereof. And the nozzles of the spraying device are arranged in a lattice with respect to the water pipe.

In order to achieve the above object, in the gas turbine intake air cooling apparatus according to the present invention, the intake chamber formed in a rectangular shape has a rectangular cylindrical shape. is there.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas turbine intake air cooling apparatus according to the present invention will be described below with reference to the drawings and the reference numerals attached to the drawings.

FIG. 1 is a schematic system diagram showing a first embodiment in which the gas turbine intake air cooling device according to the present invention is applied to gas turbine equipment.

The gas turbine equipment utilizing the gas turbine intake air cooling system according to the present embodiment includes an intake chamber 1, an air compressor 2, a gas turbine combustor 3, a gas turbine 4, and a generator in order of the flow of fluid. The suction chamber 1 is provided with the suction filter 8 and the spray device 1 provided with the nozzle 10 in order from the inlet 6 toward the air compressor 2.
1. A thermometer 7 and a humidity detector 9 are provided in a space between the intake filter 8 and the spray device 11, which is constituted by an intake silencer 12.
An air flow detector 13 is provided in a space between the spray device 11 and the air compressor 2.

The spraying device 11 is provided with a cooling water supply system 14 for supplying water such as pure water or office water. The cooling water supply system 14 includes a tank 16 for storing water from a pure water system or a water system after being controlled by a control valve 15.
A heat exchanger 19 for cooling the first cooling water flowing out of the tank 16 with the second cooling water from another cooling water system 18 having an on-off valve 17, and the first cooling water flowing out of the heat exchanger 19 Flow control valve 2 which supplies pressure to the spray device 11 by pumping
1 is provided.

As shown in FIG. 11, the flow control valve 21 includes a signal relating to the atmospheric temperature from the thermometer 7, a signal relating to the humidity from the humidity detector 9, a signal relating to the air flow from the air flow detector 13, and a load. The control unit 27 performs an operation based on at least one of the signals related to the generator output from the detector 22, and is controlled by a valve opening / closing signal generated from the operation signal.

In the gas turbine equipment utilizing the gas turbine intake air cooling system having such a configuration, the air sucked from the intake chamber 1 is supplied to the intake filter 8 provided at the inlet 6.
After the dust is removed by the nozzle, mist-like water is supplied from the nozzle 10 of the spray device 11.

At this time, the cooling water supply system 14
The first cooling water stored in the water is cooled by the heat exchanger 19, pumped by the pump 20, flow-controlled by the flow control valve 21, and supplied to the spray device 11. In this case, the flow control valve 21 is controlled so that the amount of water to be sprayed is commensurate with the amount of air sucked by the intake chamber 1. That is, among the atmospheric temperature detected from the thermometer 7, the humidity of the intake chamber 1 detected from the humidity detector 9, the air flow detected from the air flow detector 13, and the output of the generator 5 detected from the load detector 22, An optimal spray water amount corresponding to each state quantity obtained in advance based on at least one or more data is calculated, and is controlled by a valve opening / closing signal generated from the calculation signal.

The first cooling water thus controlled is sprayed out of the nozzle 10 in a mist state to cool the air. At this time, even if the particle size of the water droplet ejected from the nozzle 10 in the form of mist exceeds, for example, 50 μm, the intake silencer 12
Collides with the air to atomize it, and the intake chamber 1
Collected at the bottom of the system and discharged out of the system as drain water.
Further, in the spray device 11 having the nozzle 10, the intake silencer 12 is arranged in the middle, the distance to the air compressor 2 is relatively long, and the atomized water droplets are evaporated and vaporized. Water droplets are not sucked into the machine 2 and do not damage each wing of the air compressor.

On the other hand, the cooled air is compressed by the air compressor 2 to a high temperature and high pressure, and the high temperature and high pressure air is supplied to the gas turbine combustor 3 together with fuel (not shown), where the combustion gas is discharged. The generated combustion gas is subjected to expansion work in the gas turbine 4, and the generator 5 is driven by the generated torque.

As described above, the present embodiment uses the spray device 11
Is installed upstream of the intake silencer 12 and a relatively long distance from the air compressor 2 is secured.
Even if the particle size of the water droplet ejected from the nozzle 10 is large, it can be made to collide with the intake silencer 12 to reduce the particle size, and the water droplet having the reduced particle size can evaporate within a relatively long distance. Can be vaporized.

Therefore, in the present embodiment, the spraying device 1
The air is cooled by water droplets sprayed from the first nozzle 10, and at the time of cooling, water droplets having a large particle diameter collide with the intake silencer 12 to be reduced, and the reduced water droplets are evaporated and vaporized. Even when the power is high, the output can be maintained as designed, and damage to each blade of the air compressor due to water droplets can be reliably prevented.

FIG. 2 is a schematic system diagram showing a second embodiment in which the gas turbine intake air cooling device according to the present invention is applied to gas turbine equipment. The same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will not be repeated.

The gas turbine equipment utilizing the gas turbine intake cooling device according to the present embodiment is designed by the spray device 1
In consideration of a case where the distance from the air compressor 1 to the air compressor 2 cannot be ensured with a margin, a water droplet removing device 23 is installed downstream of the intake silencer 12 in the intake chamber 1.

The water drop removing device 23 employs any structure such as a louver type in which a plate is arranged at an inclination, a mesh type in which a mesh or lattice is formed to reduce the particle diameter of water drops, and the like.

As described above, in the present embodiment, the water droplet removing device 23 is installed on the downstream side of the intake silencer 12 and on the upstream side of the inlet of the air compressor 2, and the relatively fine particles ejected from the nozzle 10 of the spray device 11 are provided. Large diameter water drops are intake silencer 1
Since the water that has passed through the air compressor 2 is also removed, the water droplets do not flow into the air compressor 2 as they are, and the water droplets do not damage each blade of the air compressor.

In this embodiment, the intake silencer 12
The water drop removing device 23 is installed on the downstream side of the air compressor 2 and on the inlet side of the air compressor 2, but is not limited to this example. For example, as shown in FIG. A water drop removing device 23 may be installed upstream of the apparatus.

FIG. 4 is a conceptual diagram showing a fourth embodiment in which the gas turbine intake air cooling device according to the present invention is applied to gas turbine equipment.

In the gas turbine equipment utilizing the gas turbine intake air cooling device according to the present embodiment, the spray device 11 is provided with a plurality of water pipes 24a, 24b,.
, provided with nozzles 10a, 10b,... provided at each of the water guide pipes 24a, 24b,.
Are provided with cooling water supply pipes 25a, 25b,... Connected to the pump 20 through the intermediaries 1a, 21b,.

The water pipes 24a, 24b,...
As shown in FIG. 5, while being supported by supports 26a and 26b, the bottom side thereof is provided with manifolds 29a, 29b,... As shown in FIGS.

The flow control valves 21a, 21b,.
As shown in FIG. 1, the atmospheric temperature detected by the thermometer 7, the humidity of the air intake chamber 1 detected by the humidity detector 9, the air flow detected by the air flow detector 13, and the generator detected by the load detector 22 5, the control device 27 calculates an optimal amount of spray water corresponding to each state quantity obtained in advance based on at least one or more data, and is controlled by a valve opening / closing signal as the output.

As described above, in the present embodiment, the spraying device 11
, And a plurality of nozzles 1
, 0a, 10b,..., And the air is cooled with more spray water, so that the air can be reliably cooled.

In the present embodiment, the plurality of cooling water supply pipes 25a, 25b,.
are provided, but are not limited to this example. For example, as shown in FIG. 7, pumps 20a, 20b,..., check valves 30a, 30b,. On-off valves 17a, 17b, ... may be provided. As shown in FIG. 12, the operation of the plurality of pumps 20a, 20b,... Is controlled by the atmospheric temperature detected by the thermometer 7, the humidity of the intake chamber 1 detected by the humidity detector 9, and the air flow rate detected by the air flow detector 13. Among the detected air flow rate and the output of the generator 5 detected from the load detector 22, the arithmetic control unit 28 calculates based on at least one or more data, and calculates the optimal spray water amount corresponding to each state quantity obtained in advance. Is limited by the pump operation number command signal which is the output. This is in accordance with the amount of intake air in the intake chamber 1. In particular, the pumps 20a, 20
It becomes convenient when restricting the operation of b,. FIG.
9 and FIG. 9 are the same as the components of the fourth embodiment, and a description thereof will be omitted.

FIG. 10 is a partial conceptual view showing a sixth embodiment in which the gas turbine intake air cooling device according to the present embodiment is applied to gas turbine equipment.

In the gas turbine equipment utilizing the gas turbine intake cooling system according to the present embodiment, the first cooling water stored in the tank 16 is supplied to the spray device 11 via the heat exchanger 19, the pump 20, and the control valve 21. At this time, another control valve 31 is provided to supply another second cooling water from the cooling system 18 to the heat exchanger 19 and control the first cooling water having a high temperature to lower the temperature.
Is provided.

As described above, in the present embodiment, since the control valve 31 is provided in the heat exchanger 19 of the cooling system 18 and the second cooling water supplied to the heat exchanger 19 is controlled, the first cooling water is supplied to the optimum temperature. Can be reliably cooled. In particular, the first cooling water having a low temperature can be supplied even during the operation in summer, which is effective.

FIG. 13 is a conceptual diagram showing a seventh embodiment in which the gas turbine intake air cooling device according to the present invention is applied to gas turbine equipment.

The gas turbine equipment using the gas turbine intake air cooling system according to the present embodiment cannot secure a sufficient distance due to the installation area. For example, the intake chamber 1 is rectangular and the intake port is at the bottom or top, and the intake chamber is Considering the case where 1 is composed of three surfaces, each surface of the intake chamber 1 is, as shown in FIG.
The water pipe 24 connected to the manifolds 29a, 29b, ...
a, 24b,..., nozzles 10a, 10
The spraying device 11 composed of b,... is installed. In addition, the intake chamber 1 formed in a square shape is a square tubular shape.

As described above, in the present embodiment, the spraying device 11
Is stretched on the three surfaces of the intake chamber 1 to cool the sucked air, so that the air can be reliably cooled as designed.

[0054]

As described above, in the intake air cooling device according to the present invention, the spray device for spraying water to the sucked air to cool the air is installed on the upstream side of the intake silencer,
The distance between the spray device and the air compressor is increased, and the water droplets ejected from the spray device collide with the intake silencer to reduce the particle size.The water droplets with the reduced particle size evaporate before flowing into the air compressor. -Since it vaporizes, damage to each blade of the air compressor due to water droplets can be reliably prevented.

Further, the gas turbine intake air cooling device according to the present invention is provided with a water droplet removing device when the distance from the spray device to the air compressor cannot be ensured long by design, so that the water droplet ejected from the spray device is provided. Can be reliably removed.

Further, in the gas turbine intake air cooling device according to the present invention, since the cooling water supplied to the spray device is controlled by the flow control valve so as to match the operating state of the gas turbine equipment, the sucked air is reliably cooled. be able to.

[Brief description of the drawings]

FIG. 1 is a schematic system diagram showing a first embodiment in which a gas turbine intake air cooling device according to the present invention is applied to gas turbine equipment.

FIG. 2 is a schematic system diagram showing a second embodiment in which the gas turbine intake air cooling device according to the present invention is applied to gas turbine equipment.

FIG. 3 is a schematic system diagram showing a third embodiment in which the gas turbine intake air cooling device according to the present invention is applied to gas turbine equipment.

FIG. 4 is a conceptual diagram showing a fourth embodiment in which the gas turbine intake air cooling device according to the present invention is applied to gas turbine equipment.

FIG. 5 is a front view as seen from the direction of arrows AA in FIG. 4;

FIG. 6 is a front view as seen from the direction of arrows BB in FIG. 4;

FIG. 7 is a conceptual diagram showing a fifth embodiment in which the gas turbine intake air cooling device according to the present invention is applied to gas turbine equipment.

8 is a front view as seen from the direction of arrows CC in FIG. 7;

FIG. 9 is a front view as seen from the direction of arrows DD in FIG. 7;

FIG. 10 is a partial conceptual diagram showing a sixth embodiment in which the gas turbine intake air cooling device according to the present invention is applied to gas turbine equipment.

FIG. 11 is a schematic control block diagram applied to a flow control valve of the gas turbine intake air cooling device according to the present invention.

FIG. 12 is a schematic control block diagram applied to a pump of the gas turbine intake air cooling device according to the present invention.

FIG. 13 is a partial conceptual view showing a seventh embodiment in which the gas turbine intake air cooling device according to the present invention is applied to gas turbine equipment.

FIG. 14 is a front view as viewed from the direction of arrows A, B, and C in FIG. 13;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 intake chamber 2 air compressor 3 gas turbine combustor 4 gas turbine 5 generator 6 inlet 7 thermometer 8 intake filter 9 humidity detector 10, 10a, 10b, 10c, 10d nozzle 11 sprayer 12 intake silencer 13 air flow detection Apparatus 14 Cooling water supply system 15 Control valve 16 Tank 17 Open / close valve 18 Cooling system 19 Heat exchanger 20, 20a, 20b, 20c, 20d Pump 21, 21a, 21b, 21c, 21d Flow control valve 22 Load detector 23 Droplet removal Apparatus 24a, 24b, 24c, 24d Water pipe 25a, 25b, 25c, 25d Cooling water supply pipe 29a, 29b, 29c, 29d Manifold 30a, 30b, 30c, 30d Check valve 31 Control valve

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Takehiko Matsushita Toshiba Corporation Head Office, 1-1-1, Shibaura, Minato-ku, Tokyo

Claims (11)

[Claims] An intake silencer installed in an intake chamber, a spray device installed upstream of the intake silencer to spray and cool water drawn into the air, and a cooling water supply for supplying water to the spray device A gas turbine intake air cooling device comprising: 2. An intake silencer installed in an intake chamber, a spray device installed upstream of the intake silencer to spray and cool water drawn in, and a cooling water supply for supplying water to the spray device A gas turbine intake cooling device comprising: a system; and a water drop removing device installed downstream of the intake silencer to remove water droplets from the spray device. 3. An intake silencer installed in an intake chamber, a spray device installed upstream of the intake silencer to spray and cool water drawn in, and a cooling water supply for supplying water to the spray device A gas turbine intake cooling device, comprising: a system; and a water droplet removing device installed upstream of the intake silencer and downstream of the spray device to remove water droplets from the spray device. 4. The gas turbine intake cooling device according to claim 1, wherein the spraying device comprises a water pipe connected to a plurality of manifolds, and a nozzle provided in the water pipe. 5. A cooling water supply system comprising: a tank for storing the first cooling water; a heat exchanger for cooling the first cooling water discharged from the tank with another second cooling water; First
4. The gas turbine intake cooling device according to claim 1, further comprising a flow control valve for controlling cooling water. 6. The heat exchanger according to claim 1, wherein the cooling system for supplying the second cooling water for cooling the first cooling water includes one of an on-off valve and a control valve. 5
A gas turbine intake cooling device as described. 7. A flow control valve, comprising: a signal relating to an atmospheric temperature;
Of the signal regarding the humidity of the intake chamber, the signal regarding the air flow rate sucked into the intake chamber, and the signal regarding the output of the generator,
6. The gas turbine intake cooling system according to claim 5, further comprising: a control device that calculates based on at least one signal and generates a valve opening / closing signal based on a result of the calculation. 8. A cooling water supply system is provided in each of the plurality of cooling water supply pipes connected to the spraying device and the plurality of cooling water supply pipes, and the cooling water supply system sequentially pumps along the flow of the cooling water toward the spraying device. 4. The gas turbine intake cooling system according to claim 1, further comprising a check valve, a check valve and an on-off valve. 9. The pump calculates on the basis of at least one of a signal relating to the atmospheric temperature, a signal relating to the humidity of the intake chamber, a signal relating to the flow rate of air sucked into the intake chamber, and a signal relating to the output of the generator. 8. The gas turbine intake air cooling device according to claim 7, further comprising an arithmetic control unit that issues a pump operating number command based on a result of the arithmetic operation. 10. The air intake chamber is formed in a square shape, a spray device is stretched on three sides thereof, and nozzles of the spray device are arranged in a grid pattern with respect to a water pipe. The gas turbine intake cooling device according to any one of 2 and 3. 11. The gas turbine intake air cooling device according to claim 10, wherein the rectangular intake chamber is formed in a quadrangular cylindrical shape.