JP2001280103A - Turbine equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a high pressure feed water amount required for cooling extracted air, even at a time of starting where a steam generating amount is small or at a time of low load operation. SOLUTION: The turbine equipment has: a cooling means 51 for the extracted air for cooling a turbine 3 side by using part of the high pressure feed water supplied to a high pressure steam unit 10; and a bypass passage 71 branched from a high pressure feed water passage 55 through which feed water on an outlet side of the cooling means 51 is introduced into a high pressure drum 22, and connected to a condenser 16. Further, the bypass passage 71 has a flow regulating valve 72. When output of a gas turbine 4 is less than a predetermined value such as at a time of starting the turbine equipment, the regulating valve 72 is opened, so that the high pressure feed water that has cooled the extracted air in the cooling means 51 is returned to the condenser 16. Accordingly, even at the time of starting where the steam generating amount is small or at the time of the low load operation, the high pressure feed water amount required for cooling the extracted air is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a steam generating facility and a turbine facility combining a gas turbine and a steam turbine.

[0002]

2. Description of the Related Art From the viewpoints of effective use of energy resources and economic efficiency, various high efficiencies have been achieved in power generation facilities (power generation plants). A turbine facility (combined power plant) combining a gas turbine and a steam turbine is one of them.

In a combined cycle power plant, high-temperature exhaust gas from a gas turbine is sent to an exhaust heat recovery boiler, and steam is generated in the exhaust heat recovery boiler via a superheating unit, and the generated steam is sent to a steam turbine. I work in a steam turbine. The superheating unit has a economizer, a superheater, a boiler (drum and evaporator), etc. In order to improve the heat recovery rate of the boiler, a multistage (for example, high pressure, medium pressure, low pressure) superheating unit is provided. Provided. Each of the high-, medium-, and low-pressure superheat units is provided with a superheater, a drum, and the like.

In the combined cycle power plant, various measures have been taken to improve the efficiency in a high temperature range in order to improve the overall efficiency, and various cooling systems are provided in view of the heat resistance of the gas turbine structure. For example, a part of compressed air from a compressor is extracted and cooled by a heat exchanger, and the cooled extracted air is used as a cooling medium for a structure such as a turbine rotor. In this case, as a cooling medium of the bleed air used in the heat exchanger, shaft chilled water in a plant or the like is used.

[0005]

In a conventional combined cycle power plant (turbine facility), a part of the compressed air from the compressor is extracted and used as cooling air for a structure such as a turbine rotor. Etc. can be effectively cooled. However, as a refrigerant for cooling the extraction air, using shaft chilled water in the plant, etc.
The shaft cold water etc. after cooling the extraction air were discharged as it was. For this reason, it cannot be said that the energy of the refrigerant is effectively recovered, and there is currently room for improvement in improving the efficiency of the entire plant.

[0006] The present invention has been made in view of the above circumstances, and has as its object to provide a turbine facility capable of cooling turbine cooling air with improved efficiency.

[0007]

According to the present invention, there is provided a gas turbine comprising a compressor and a turbine, and an exhaust heat recovery boiler for recovering exhaust heat of the gas turbine to generate steam. A steam turbine powered by steam generated by the heat recovery steam generator, a condenser for condensing steam discharged from the steam turbine, and a water supply means for supplying condensate water of the condenser to the heat recovery steam generator. Cooling means for introducing a part of the compressed air of the compressor as extracted air, a part of the feed water of the exhaust heat recovery boiler, cooling the extracted air by the feed water, and introducing the extracted air to the turbine side of the gas turbine. It is characterized by having.

The exhaust heat recovery boiler is provided with a preheater for preheating the feedwater. In the exhaust heat recovery boiler, steam is generated from the feedwater preheated by the preheater, and the feedwater introduced into the cooling means is supplied to the preheater. It is characterized by being pre-heated water supply. In addition, an introduction path for introducing the feed water at the outlet side of the cooling means to the exhaust heat recovery boiler side, and a feed water branched from the introduction path and provided at the outlet side of the cooling means when the amount of water supply is less than a predetermined amount. And a bypass for introducing into the vessel. Further, a communication path communicating the upstream side and the downstream side of the preheater is provided, and a valve is provided for opening the communication path when the temperature of the water supplied to the cooling means is lowered.

Further, the turbine equipment of the present invention for achieving the above object has a gas turbine comprising a compressor and a turbine, and a preheater for preheating supply water, and recovers exhaust heat of the gas turbine to be preheated. Heat recovery boiler that generates steam from the supplied water, a steam turbine that uses steam generated by the heat recovery steam generator as a power source, a condenser that condenses the steam exhausted from the steam turbine, and a condenser that condenses the steam. Means for supplying water to the heat recovery steam generator, a part of the compressed air of the compressor is introduced as extraction air, and a part of the water supply of the heat recovery boiler is introduced to cool the extraction air by the water supply to the gas turbine. A cooling means for introducing into the turbine side of the cooling means, an introduction path for introducing the feedwater on the outlet side of the cooling means to the exhaust heat recovery boiler side, and a cooling means provided when branched from the introduction path and the supplied water amount is less than a predetermined amount. Outgoing A bypass path for introducing water into the condenser, a communication path for communicating the upstream side and the downstream side of the preheater, and a valve for opening the communication path when lowering the temperature of the water supplied to the cooling means are provided. It is characterized by having.

[0010] A temperature detecting means for detecting the temperature of the water supply is provided in the water supply passage on the downstream side of the valve, and the opening and closing of the valve is controlled based on the information detected by the temperature detecting means to supply the water supplied to the cooling means. A temperature adjusting means for maintaining the temperature at a predetermined temperature is provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic configuration of the entire turbine equipment according to a first embodiment of the present invention, and FIG. 2 shows a main configuration of a cooling system. In FIGS. 1 and 2,
The water lines are indicated by solid lines and the steam and air lines are indicated by dotted lines.

As shown in FIG. 1, a compressor 1 and a combustor 2
And a gas turbine 4 having a turbine 3. A steam turbine 5 is connected coaxially with the gas turbine 4. The steam turbine 5 has a configuration in which a high-pressure turbine 6, an intermediate-pressure turbine 7, and a low-pressure turbine 8 are connected uniaxially. Exhaust gas G from the gas turbine 4 is sent to an exhaust gas boiler 9 as an exhaust heat recovery boiler. The exhaust gas boiler 9 has a high-pressure superheating unit 10, a medium-pressure superheating unit 11, A low pressure heating unit 12 is provided. Further, the exhaust gas boiler 9 is provided with a preheater 61 for preheating the feedwater. In the exhaust gas boiler 9, steam is generated from feedwater preheated by a preheater 61 through a high-pressure superheating unit 10, a medium-pressure superheating unit 11, and a low-pressure superheating unit 12, and the generated steam is sent to a steam turbine 5. I'm working from here. The exhaust steam of the steam turbine 5 is supplied to the condenser 1
Condensed at 6. Reference numeral 13 in the drawing denotes a generator. Reference numeral 19 denotes an electric valve provided in the inflow path of the preheater 61, 2
0 is a motor-operated valve provided in the outflow path from the preheater 61, 30
Is a reflow path connecting the outflow side and the inflow side of the preheater 61, and the reflow path 30 is provided with a pump 38 and a regulating valve 39.

The high-pressure superheater unit 10 includes a high-pressure superheater 2
1, high pressure drum 22, high pressure evaporator 23, high pressure economizer 2
Four. The water in the high-pressure drum 22 is superheated and circulated in a high-pressure evaporator 23 disposed in the exhaust gas boiler 9, and generates high-pressure steam in the high-pressure drum 22. The high-pressure steam generated by the high-pressure drum 22 is superheated by the high-pressure superheater 21, and is introduced into the high-pressure turbine 6 of the steam turbine 5 through the high-pressure steam line 25. Water superheated by the low-pressure economizer 44 is fed to the high-pressure drum 22 by the high / medium-pressure water supply pump 15 and supplied through the water supply passage 26 and the high-pressure economizer 24.

The medium-pressure superheater 11 is a medium-pressure superheater 3
1, medium pressure drum 32, medium pressure evaporator 33, medium pressure economizer 3
Four. The water in the medium pressure drum 32 is superheated and circulated in a medium pressure evaporator 33 disposed in the exhaust gas boiler 9, and generates medium pressure steam in the medium pressure drum 32. The intermediate-pressure steam generated by the intermediate-pressure drum 32 passes through the intermediate-pressure superheater 31, is superheated by the reheater 28, and is introduced from the intermediate-pressure steam line 35 to the intermediate-pressure turbine 7 of the steam turbine 5. To the medium pressure drum 32, the water preheated by the preheater 61 and the water superheated by the low pressure economizer 44 are pumped by the high / intermediate water feed pump 15, and are fed through the water supply channel 36 and the intermediate economizer 34. Water. On the other hand, the exhaust steam of the high-pressure turbine 6 is sent to the reheater 28, overheated, and introduced from the intermediate-pressure steam line 35 to the intermediate-pressure turbine 7 of the steam turbine 5.

The low-pressure superheater 12 is provided with a low-pressure superheater 4
1, low pressure drum 42 and low pressure evaporator 43, low pressure economizer 4
Four. The water in the low-pressure drum 42 is superheated and circulated in a low-pressure evaporator 43 disposed in the exhaust gas boiler 9 to generate low-pressure steam in the low-pressure drum 42. The low-pressure steam generated by the low-pressure drum 42 passes through the low-pressure superheater 41 and is introduced from the low-pressure steam line 45 to the medium-pressure turbine 7 and the low-pressure turbine 8 of the steam turbine 5. The low-pressure drum 42 is preheated by a preheater 61 with water condensed through a condenser 16 and a condensate pump 17 serving as water supply means.
The water is heated at 4 and supplied.

As shown in FIGS. 1 and 2, the gas turbine 4
A part of the compressed air compressed by the compressor 1 is introduced into the cooling means 51 from the extraction air passage 52 as extraction air. On the other hand, the water supply on the exhaust gas boiler 9 side is introduced into the cooling means 51 from the water supply introduction passage 53. In other words, the water supply passage 26 for pumping the water supply by the high / medium pressure water supply pump 15 is connected to the high pressure
The feed water is supplied to the exhaust gas boiler 9 from the feed water introduction passage 53 and is introduced into the cooling means 51. In the cooling means 51, the extracted air is cooled by the high-pressure water supplied from the water supply introduction path 53, and the extracted air cooled by the cooling means 51 is used for cooling the blades and the like on the turbine 3 side in the cooling air path 5.
The high-pressure water supplied to the turbine 3 from the cooling water 4 and cooled by the cooling means 51 is sent to the high-pressure drum 22 from a high-pressure water supply path 55 serving as an introduction path.

A main flow meter 62 for detecting the flow rate of the supplied water is provided in the flow path 58, and the flow rate of the supplied water in the flow path 58 is detected by the main flow meter 62. The high-pressure water supply channel 55 has a flow meter 63.
And a flow control valve 64. On the other hand, the gas turbine 4 is provided with load detection means (not shown) for detecting the output. The flow regulating valve 64 is controlled based on the steam flow rate detected by the flow meter 63 and the load condition of the gas turbine 4 detected by the load detecting means. The amount of water supplied and the amount of water supplied from the water supply passage 26 to the cooling means 51 through the water supply introduction passage 53 are adjusted.

In the above-described turbine equipment, the exhaust heat of the gas turbine 4 is recovered by the exhaust gas boiler 9 to generate steam, and the steam generated by the exhaust gas boiler 9 is
And the work is performed by the steam turbine 5. High-pressure water (for example, at a temperature of 150 ° C.) from the water supply passage 26 is sent to the cooling means 51 through the water supply introduction passage 53. On the other hand, the extraction air from the compressor 1
2 to the cooling means 51, where the extracted air is cooled by high-pressure water (for example, at a temperature of 200
C), the cooled extraction air is introduced into the turbine 3 to cool turbine blades and the like. The water supply after cooling the extracted air is sent from the high-pressure water supply channel 55 to the high-pressure drum 22.
For this reason, the extraction air can be cooled by the high-pressure water supply on the exhaust gas boiler 9 side, the high-pressure water supply after cooling the extraction air can be collected, and efficient turbine equipment can be provided.

The turbine equipment according to the second embodiment will be described with reference to FIGS. FIG. 3 shows a schematic configuration of the entire turbine equipment according to a second embodiment of the present invention, and FIG. 4 shows a main configuration of a cooling system. Note that the same members as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, and redundant description is omitted.

The turbine equipment shown in FIGS. 3 and 4 has a bypass passage branched from a high-pressure water supply passage 55 (introduction passage) for introducing the water supply at the outlet side of the cooling means 51 to the high-pressure drum 22 and leading to the condenser 16. The bypass passage 71 is provided with a flow regulating valve 72. When the amount of water supplied to the exhaust gas boiler 9 is less than a predetermined amount, such as when the turbine equipment is started, the flow control valve 72 is opened, and the high-pressure water cooled by the cooling means 51 to cool the extracted air is returned from the bypass 71 to the condenser 16. , Ensure a predetermined amount of water supply.

On the other hand, a communication passage 75 is provided for communicating an inflow passage into the preheater 61 on the upstream side of the motor-operated valve 19 and an outflow passage from the preheater 61 on the downstream side of the motor-operated valve 20. An electric valve 76 is provided at 75 as a valve for opening the communication passage 75 when the temperature of the water supplied to the cooling means 51 is lowered.
That is, by opening the communication passage 75 by the electric valve 76, the water supply to the preheater 61 is sent to the outflow path side without passing through the preheater 61, and the temperature of the water supply to the water supply introduction path 53 is reduced. Further, a temperature detector 77 for detecting the temperature of the cooled extracted air is provided in the cooling air passage 54 of the cooling means 51, and when the temperature of the extracted air cooled by the temperature detector 77 becomes equal to or higher than a predetermined value. The motor-operated valve 76 is opened. In addition, you may make it open the motor-operated valve 76 and lower the supply water temperature systematically.

In the above-described turbine equipment, similarly to the first embodiment, the exhaust heat of the gas turbine 4 is recovered by the exhaust gas boiler 9 to generate steam, and the steam generated by the exhaust gas boiler 9 is sent to the steam turbine 5. The work is performed in the steam turbine 5. The high-pressure water (for example, at a temperature of 150 ° C.) from the water supply passage 26 is supplied to the water supply introduction passage 53
Through the cooling means 51. On the other hand, the extracted air from the compressor 1 is sent from the extraction air passage 52 to the cooling means 51, where the extracted air is cooled by high-pressure water (for example, at a temperature of 200 ° C.), and the cooled extracted air is cooled by the turbine. 3 to cool turbine blades and the like. Also,
The water supply after cooling the extracted air is sent from the high-pressure water supply channel 55 to the high-pressure drum 22. For this reason, the extraction air can be cooled by the high-pressure water supply on the exhaust gas boiler 9 side, the high-pressure water supply after cooling the extraction air can be collected, and efficient turbine equipment can be provided.

By the way, when the load of the gas turbine is not sufficiently increased, such as at the time of start-up or low load operation, the amount of steam generated in the exhaust gas boiler 9 is small and the amount of water supplied to the exhaust gas boiler 9 is small. On the other hand, much water is required to cool the extraction air. For this reason, at the time of start-up, low-load operation, or the like, the amount of supplied water is insufficient. Therefore, when the output of the gas turbine 4 detected by the load detecting means (not shown) is less than a predetermined value, such as at the time of startup or low load operation, the flow regulating valve 64 is closed and the flow regulating valve 72 is closed.
And the high-pressure water cooled by the cooling means 51 to cool the extracted air is returned to the condenser 16 from the bypass passage 71 without being sent to the high-pressure drum 22. Thereby, even at the time of start-up or low-load operation with a small amount of generated steam, the amount of high-pressure supply water necessary for cooling the extracted air can be ensured.

When the load detecting means detects that the output of the gas turbine 4 has become equal to or greater than a predetermined value, the main flow meter 62 indicates that the amount of water supplied to the flow passage 58 has become equal to or greater than the predetermined amount.
The flow control valve 64 is opened, the flow control valve 72 is closed, and the high-pressure feed water whose extracted air is cooled by the cooling means 51 is sent to the high-pressure drum 22. And the flow control valve 73
Is closed during normal operation and used as a backup for emergencies, etc., and is opened when the amount of water supply drops rapidly.

For example, if the required water supply amount of the cooling means 51 is 60 to
n / h and the total evaporation amount of the exhaust gas boiler 9 is 300 ton / h, the extracted air is supplied from the time of startup until the feedwater flow rate detected by the main flow meter 62 becomes, for example, 100 ton / h. The high-pressure feed water cooled is returned to the condenser 16 from the bypass 71 without being sent to the high-pressure drum 22. When the feed water flow rate detected by the main flow meter 62 exceeds 100 ton / h, the gas turbine 4 Under the condition, the flow control valve 64 is opened, the flow control valve 72 is closed, and the high-pressure feed water whose extracted air is cooled by the cooling means 51 is sent to the high-pressure drum 22. In addition, regardless of the output of the gas turbine 4, the main flow meter 62
The high-pressure water may be sent to the high-pressure drum 22 when the flow rate of the water supply detected by the above is sufficiently increased.

On the other hand, when the temperature of the extracted air cooled by the cooling means 51 is detected by the temperature detector 77 to be equal to or higher than a predetermined value, the communication passage 75 is opened by the electric valve 76,
The water supply to the preheater 61 is sent to the outflow path side without passing through the preheater 61, and the temperature of the supply water sent to the water supply introduction path 53 is reduced. The electric water supply temperature may be lowered by opening the electric valve 76 intentionally. As a result, the supply water whose temperature has been lowered is sent to the cooling means 51, and the temperature of the extracted air which has become equal to or higher than a predetermined value can be reduced to a predetermined value (for example, 200 ° C. or lower). The opening and closing of the flow control valve 72 may be controlled based on the information on the temperature of the extracted air detected by the temperature detector 77 to adjust the amount of water supply to lower the temperature of the extracted air.

Therefore, even when the load on the gas turbine 4 is low, the steam generation amount is small, and the feedwater flow rate is small, such as when the turbine equipment is started, the feedwater flow rate necessary for the cooling means 51 can be secured. The extracted air can be reliably cooled regardless of the operation state of the turbine equipment. Also,
Even if the temperature of the extraction air rises, the temperature of the water supplied to the cooling means can be lowered, so that the extraction air can be reliably cooled.

In the above-described embodiment, the turbine equipment of the first embodiment is provided with a communication passage 75 for bypassing the preheater 61 and an electric valve 76, and feed water cooled with extracted air is supplied to the condenser 16. Feeding bypass 71, flow control valve 7
Although two are provided, it is also possible to omit any one of the communication passage 75, the electric valve 76 or the bypass passage 71, and the flow regulating valve 72. The information for controlling the flow regulating valve 72 includes load detecting means, the main flow meter 63 and the temperature detector 7.
In addition to the information of 7, the information of the other devices such as the flow meter 63 on the outlet side of the cooling means 51 can be used as long as the information can derive the flow rate and the temperature of the feed water. In addition, the open / close state of the flow rate adjusting valve 72 can be opened / closed in various situations, such as in a stepwise manner, as long as the required water supply flow rate for the cooling means 51 can be secured.

The turbine equipment according to the third embodiment will be described with reference to FIG. FIG. 5 shows a main configuration of a cooling system of a turbine facility according to a third embodiment of the present invention.
Note that the same members as those shown in FIG. 4 are denoted by the same reference numerals, and redundant description is omitted.

In the turbine equipment shown in FIG. 5, a flow regulating valve 81 is provided in place of the motor-operated valve 76 of the turbine equipment shown in FIG. Configuration. Then, the temperature of the feedwater preheated by the preheater 61 is detected by the temperature detecting means 82, and the opening / closing amount of the flow control valve 81 is controlled based on the detected temperature (temperature adjusting means).

With this arrangement, low-temperature feedwater that does not pass through the preheater 61 can be introduced from the communication passage 75 in a suitable amount in accordance with the temperature of the feedwater preheated by the preheater 61.
The temperature of the feedwater on the downstream side can be adjusted and maintained at a desired temperature.

[0032]

The turbine equipment of the present invention comprises a gas turbine comprising a compressor and a turbine, an exhaust heat recovery boiler for recovering exhaust heat of the gas turbine to generate steam, and a steam generated by the exhaust heat recovery boiler. A steam turbine as a power source,
A condenser for condensing the exhaust steam of the steam turbine, water supply means for supplying the condensate of the condenser to the exhaust heat recovery boiler, and a part of the compressed air of the compressor is introduced as extraction air and exhaust heat is released. A cooling means for introducing a part of the feed water of the recovery boiler and cooling the extracted air by the feed water and introducing it to the turbine side of the gas turbine is provided, so that the extracted air for turbine cooling is supplied using the feed water of the exhaust heat recovery boiler. Can be cooled. As a result, it is possible to effectively use the water supply of the exhaust heat recovery boiler, and it becomes an efficient turbine facility.

Also, an introduction path for introducing the feedwater at the outlet side of the cooling means to the exhaust heat recovery boiler, and a water supply at the outlet side of the cooling means provided when the amount of water supplied is branched from the introduction path and is less than a predetermined amount. Is provided to the condenser, so that the amount of water supplied to the cooling means can be ensured regardless of the operating state of the gas turbine.

In addition, a communication passage communicating between the upstream side and the downstream side of the preheater is provided, and a valve is provided for opening the communication passage when the temperature of the water supplied to the cooling means is lowered. The supplied water can be kept below a predetermined temperature.

Further, the turbine equipment of the present invention has a gas turbine comprising a compressor and a turbine, and a preheater for preheating the feed water, and recovers exhaust heat of the gas turbine to generate steam from the preheated feed water. An exhaust heat recovery boiler, a steam turbine powered by steam generated by the exhaust heat recovery boiler,
A condenser for condensing the exhaust steam of the steam turbine, water supply means for supplying the condensate of the condenser to the exhaust heat recovery boiler, and a part of the compressed air of the compressor is introduced as extraction air and exhaust heat is released. Cooling means for introducing a part of the water supply of the recovery boiler, cooling the extracted air by the water supply and introducing it to the turbine side of the gas turbine, and an introduction path for introducing the water supply at the outlet side of the cooling means to the exhaust heat recovery boiler side, A bypass path which is provided branching from the introduction path and which introduces the supply water on the outlet side of the cooling means to the condenser when the amount of supplied water is less than a predetermined amount communicates with the upstream side and downstream side of the preheater. Since the communication passage and the valve that opens the communication passage when the temperature of the feed water introduced into the cooling unit is lowered are provided, it is possible to cool the extraction air for turbine cooling using the feed water of the exhaust heat recovery boiler, Regardless of the operating state of the turbine, It is possible to maintain the feed water introduced into the cooling means it is possible to coercive below a predetermined temperature.
As a result, the water supply of the exhaust heat recovery boiler at the desired water supply amount and temperature can be effectively used regardless of the operation state, and the turbine equipment becomes efficient.

Further, a temperature detecting means for detecting the temperature of the water supply is provided in a water supply passage on the downstream side of the valve, and the opening and closing of the valve is controlled based on the detection information of the temperature detecting means to supply the water supplied to the cooling means. Since the temperature adjusting means for maintaining the temperature at the predetermined temperature is provided, the temperature of the supply water introduced into the cooling means can be adjusted and maintained at a desired temperature.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating an entire turbine facility according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a main part of a cooling system.

FIG. 3 is a schematic configuration diagram illustrating an entire turbine facility according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a main part of a cooling system.

FIG. 5 is a main part configuration diagram of a cooling system of a turbine facility according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Combustor 3 Turbine 4 Gas turbine 5 Steam turbine 9 Exhaust gas boiler 10 High pressure superheat unit 11 Medium pressure superheat unit 15 High / medium pressure feed pump 16 Condenser 17 Condensate pump 21 High pressure superheater 22 High pressure drum 23 High pressure Evaporator 25 High-pressure steam line 26 Water supply path 51 Cooling means 52 Extraction air path 53 Water supply introduction path 54 Cooling air path 55 High-pressure water supply path 61 Preheater 62 Main flow meter 63 Flow meters 64, 72, 81 Flow control valve 71 Bypass path 75 Communication passage 76 Motor-operated valve 77 Temperature detector 82 Temperature detection means

Claims (6)

[Claims] 1. A gas turbine including a compressor and a turbine, an exhaust heat recovery boiler that recovers exhaust heat of the gas turbine to generate steam, and a steam turbine that uses steam generated by the exhaust heat recovery boiler as a power source. A condenser for condensing the exhaust steam of the steam turbine, a water supply means for supplying condensate of the condenser to the exhaust heat recovery boiler, and a part of compressed air of the compressor is introduced as extracted air and discharged. A turbine facility, comprising: cooling means for introducing a part of feed water of a heat recovery boiler, cooling extracted air by the feed water, and introducing the extracted air to the turbine side of the gas turbine. 2. The exhaust heat recovery boiler according to claim 1, further comprising a preheater for preheating the feedwater, wherein the exhaust heat recovery boiler generates steam from the feedwater preheated by the preheater and is introduced into cooling means. The turbine equipment is characterized in that the feedwater is feedwater preheated by a preheater. 3. The cooling water supply system according to claim 1, wherein the water supply at the outlet of the cooling means is introduced to the exhaust heat recovery boiler, and the water supply is branched from the introduction and is less than a predetermined amount. And a bypass for introducing water supplied to the outlet side of the cooling means into the condenser. 4. A communication device according to claim 2, further comprising a communication passage communicating between the upstream side and the downstream side of the preheater, and a valve for opening the communication passage when the temperature of the water supplied to the cooling means is lowered. Turbine equipment characterized by the following. 5. A gas turbine comprising a compressor and a turbine, an exhaust heat recovery boiler having a preheater for preheating feedwater, recovering exhaust heat of the gas turbine and generating steam from the preheated feedwater, and an exhaust heat recovery boiler. A steam turbine powered by steam generated by the heat recovery boiler, a condenser for condensing exhaust steam of the steam turbine, water supply means for supplying condensate from the condenser to the waste heat recovery boiler, and a compressor A part of the compressed air is introduced as extraction air, a part of the water supply of the exhaust heat recovery boiler is introduced, the extracted air is cooled by the water supply, and introduced into the turbine side of the gas turbine. Path for introducing the water supply on the side to the waste heat recovery boiler side, and a bypass path that is provided branching from the introduction path and that introduces water supply on the outlet side of the cooling means to the condenser when the amount of water supply is less than a predetermined amount. When,
A turbine facility comprising: a communication path that connects a upstream side and a downstream side of a preheater; and a valve that opens the communication path when cooling water supplied to cooling means. 6. A valve according to claim 4, further comprising a temperature detecting means for detecting a temperature of the water supply in a water supply passage on a downstream side of the valve, wherein opening and closing of the valve is controlled based on information detected by the temperature detecting means. And a temperature adjusting means for maintaining a temperature of feed water introduced into the cooling means at a predetermined temperature.