JP2003328776A - Method and apparatus for air compression and gas turbine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the compression power of a compressor 1. <P>SOLUTION: The compressor 1 is provided with an air extraction passage 6 for sending the air extracted from an air extraction section for extracting air upstream the air extraction section, and the air extraction passage 6 is provided with a cooler 7 for cooling the extracted air, and the air cooled by the cooler 7 is sent to the compressor 1, and air of low temperature is compressed in the compressor 1, resulting in the reduction of the compression power of the compressor 1. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an air compression method using a compressor.

The present invention also relates to an air compression device for compressing air.

The present invention also relates to a gas turbine equipment comprising an air compressor, a combustor and a turbine, and further,
The present invention relates to a combined power generation facility that combines a steam turbine and an exhaust heat recovery boiler.

[0004]

2. Description of the Related Art From the viewpoint of effective use of energy resources and economic efficiency, various improvements in efficiency have been made in power generation equipment.
One of them is a turbine power generation facility (combined power generation facility) that combines a gas turbine and a steam turbine. In the combined cycle power generation facility, the high-temperature exhaust gas from the gas turbine is sent to the exhaust heat recovery boiler, steam is generated in the exhaust heat recovery boiler via the superheat unit, and the generated steam is sent to the steam turbine and sent to the steam turbine. I am supposed to work.

A gas turbine is equipped with a compressor, a combustor and a turbine, and air and fuel compressed by the compressor are sent to the combustor, and combustion gas from the combustor operates the turbine. There is.

[0006]

Atmosphere is taken into the compressor, and power is obtained by the operation of the turbine. Various efficiency improvements have been attempted in the combined cycle power generation facility, and various efficiency improvement measures have also been taken in the gas turbine, such as output improvement, combustion efficiency improvement, and fuel saving. Since the gas turbine is equipped with a compressor, a combustor, and a turbine, there is ample room for improving output and efficiency.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air compression method and an air compression apparatus capable of reducing the power of a compressor.

Further, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a gas turbine facility and an integrated power generation facility equipped with an air compressor capable of reducing power.

[0009]

According to the air compression method of the present invention for achieving the above object, the air is extracted from the compressor, and the extracted air is cooled and introduced into the upstream side of the extraction section. Characterize.

Further, the air compressor of the present invention for achieving the above object is, in the air compressor for compressing the intake air, provided with a bleeder for bleeding air, and the air bleeded from the bleeder is more than the bleeder. It is characterized in that the extraction passage is provided to the upstream side, and the extraction passage is provided with a cooling means for cooling the extracted air.

The extraction section is provided at the outlet section, and the extraction flow path is connected to the intermediate section.

Further, the bleeding portion is provided in the middle portion and the bleeding passage is connected to the inlet portion.

An expansion turbine is provided in the extraction passage.

The gas turbine equipment of the present invention for achieving the above object comprises an air compressor according to any one of claims 2 to 5, and compressed air and fuel compressed by the air compressor. It is provided with a combustor supplied and a turbine operated by combustion gas from the combustor.

The cooling means is a fuel heating means for exchanging heat with the fuel supplied to the combustor.

Further, the cooling means is a boiler which exchanges heat with the feed water to turn the feed water into steam.

Further, the cooling means is a cooling means for exchanging heat with the cold water from the absorption refrigerator.

Further, the turbine is provided with a cooling medium recovery blade, and the extraction passage is connected to the compressor side via the cooling medium recovery blade.

The combined power generation equipment of the present invention for achieving the above object comprises a gas turbine equipment according to claim 8 and an exhaust heat recovery boiler for recovering exhaust heat of a turbine of the gas turbine equipment to generate steam. , A steam turbine that uses steam generated in the exhaust heat recovery boiler and steam generated in the boiler of the gas turbine equipment as a power source, a condenser that condenses the exhaust steam of the steam turbine, and the condensate of the condenser is discharged. Water supply means for supplying water to the heat recovery boiler is provided, and the water supply of the exhaust heat recovery boiler is sent to the boiler of the gas turbine facility.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION The air compression method of the present invention extracts air from a compressor and cools and introduces the extracted air upstream of an extraction unit. As a configuration for implementing the air compression method, in an air compression device that compresses intake air, an air extraction unit that extracts air is provided,
An extraction passage is provided for sending the air extracted from the extraction portion to the upstream side of the extraction portion, and a cooling means for cooling the extraction air is provided in the extraction passage. The bleeding section provided with the cooling means is provided at the outlet section and the bleeding channel is connected to the intermediate section, or the bleeding section is provided at the intermediate section and the bleeding channel is connected to the inlet section.

An embodiment of the present invention will be described below with reference to the drawings. 1 to 6 are schematic configurations of gas turbine equipment according to first to sixth embodiments of the present invention,
FIG. 7 shows a graph showing the relationship between the power ratio and the extraction ratio.

A first embodiment will be described with reference to FIG.

As shown in the figure, a gas turbine 4 having a compressor 1 as an air compression device, a combustor 2 and a turbine 3 is provided, and a generator 5 is coaxially connected to the gas turbine 4. Air and fuel f compressed by the compressor 1 are sent to the combustor 2 of the gas turbine 4. Compressor 1
The air and the fuel f compressed by are sent to the combustor 2, and the combustion gas from the combustor 2 drives the turbine 3 to be the power of the compressor 1 and the power of the generator 5.

A part of the compressed air which is compressed by the compressor 1 and is sent to the combustor 2 is sent to the extraction passage 6 (extraction portion). The extraction passage 6 is connected to an intermediate portion of the compressor 1. An existing extraction port or the like is applied to the part to which the extraction flow path 6 is connected. An air cooler 7 as a cooling unit is provided in the extraction passage 6, and the compressed air flowing through the extraction passage 6 is cooled by the air cooler 7.
Is cooled by. The compressed air cooled by the air cooler 7 is mixed between the stages of the compressor 1 (mixed dilution cooling), and the air temperature between the stages is lowered.

In the above-described compressor device, the bleed air from the compressor 1 is cooled by the air cooler 7 and mixed between the stages of the compressor 1 to lower the air temperature between the stages, so that the temperature of the low temperature is low. Since the air is compressed, the compression power of the compressor 1 can be reduced.

As a result, the output of the gas turbine 4 is improved and the efficiency can be improved. Moreover, since the existing extraction port or the like is applied to connect the extraction passage 6, only the pipes forming the extraction passage 6 need to be additionally installed, and the compressor 1 need not be modified. Further, the heat recovered by the air cooler 7 can be used inside and outside the plant, and the thermal energy can be recovered.

A second embodiment will be described with reference to FIG. The same members as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals.

As shown in the figure, a gas turbine 4 having a compressor 1 as a compressor, a combustor 2 and a turbine 3
And a generator 5 is coaxially connected to the gas turbine 4. A compressor 1 is installed in the combustor 2 of the gas turbine 4.
The compressed air and the fuel f are sent. The air and the fuel f compressed by the compressor 1 are sent to the combustor 2, and the combustor 2
The turbine 3 is driven by the combustion gas from the compressor 1
And the power of the generator 5.

A part of the compressed air which is compressed by the compressor 1 and is sent to the combustor 2 is sent to the extraction passage 6 (extraction portion). The extraction passage 6 is connected to an intermediate portion of the compressor 1. An existing extraction port or the like is applied to the part to which the extraction flow path 6 is connected. An air cooler 7 as a cooling unit is provided in the extraction passage 6, and the compressed air flowing through the extraction passage 6 is cooled by the air cooler 7.
Is cooled by.

An expansion turbine 9 is provided in the extraction passage 6 in the downstream of the air cooler 7, and the compressed air cooled by the air cooler 7 is expanded by the expansion turbine 9 between the stages of the post compressor 1. Mixing (mixed dilution cooling) reduces the air temperature between the stages. The expansion turbine 9 is provided with a generator 10.

In the above-described compressor device, the bleed air from the compressor 1 is cooled by the air cooler 7, the cooled compressed air is expanded by the expansion turbine 9 and mixed between the stages of the compressor 1 to interstage. Since the air temperature is reduced, the air at a low temperature is compressed, and the compression power in the compressor 1 can be reduced. At the same time, power can be obtained by operating the expansion turbine 9.

As a result, the output of the gas turbine 4 is improved and the efficiency can be improved. Moreover, since the existing extraction port or the like is applied to connect the extraction passage 6, only the pipes forming the extraction passage 6 need to be additionally installed, and the compressor 1 need not be modified. In addition, the heat recovered by the air cooler 7 can be used inside and outside the plant, so that thermal energy can be recovered and pressure energy of the expansion turbine 9 can be recovered.

A third embodiment will be described with reference to FIG. The same members as those of the second embodiment shown in FIG. 2 are designated by the same reference numerals.

As shown in the figure, a gas turbine 4 having a compressor 1 as a compressor, a combustor 2 and a turbine 3.
And a generator 5 is coaxially connected to the gas turbine 4. A compressor 1 is installed in the combustor 2 of the gas turbine 4.
The compressed air and the fuel f are sent. The air and the fuel f compressed by the compressor 1 are sent to the combustor 2, and the combustor 2
The turbine 3 is driven by the combustion gas from the compressor 1
And the power of the generator 5.

A part of the compressed air compressed by the compressor 1 and sent to the combustor 2 is sent to the extraction passage 6 (extraction portion). The extraction passage 6 is connected to an intermediate portion of the compressor 1. An existing extraction port or the like is applied to the part to which the extraction flow path 6 is connected. An air cooler 7 as a cooling unit is provided in the extraction passage 6, and the compressed air flowing through the extraction passage 6 is cooled by the air cooler 7.
Is cooled by.

An expansion turbine 9 is provided in the extraction passage 6 in the upstream of the air cooler 7, compressed air from the compressor 1 is expanded by the expansion turbine 9, and the air expanded by the expansion turbine 9 is cooled by air. It is cooled in the vessel 7 and mixed between the stages of the compressor 1 (mixed dilution cooling), and the air temperature between the stages is lowered. The expansion turbine 9 is provided with a generator 10.

In the above-described compressor device, the bleed air from the compressor 1 is expanded by the expansion turbine 9, the expanded air is cooled by the air cooler 7 and mixed between the stages of the compressor 1 to interstage. Since the air temperature is lowered, the low temperature air is compressed, and the compression power in the compressor 1 can be reduced. At the same time, power can be obtained by operating the expansion turbine 9.

As a result, the output of the gas turbine 4 is improved and the efficiency can be improved. Moreover, since the existing extraction port or the like is applied to connect the extraction passage 6, only the pipes forming the extraction passage 6 need to be additionally installed, and the compressor 1 need not be modified. In addition, the heat recovered by the air cooler 7 can be used inside and outside the plant, so that thermal energy can be recovered and pressure energy of the expansion turbine 9 can be recovered.

Although the air cooler 9 is provided in the extraction passage 6 on the rear side of the expansion turbine 9, the air cooler 9 is provided in the extraction passage 6 on the front side and the rear side of the expansion turbine 9.
It is also possible to provide each.

A fourth embodiment will be described with reference to FIG. The same members as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals.

As shown in the figure, a gas turbine 4 having a compressor 1 as a compressor, a combustor 2 and a turbine 3.
And a generator 5 is coaxially connected to the gas turbine 4. A compressor 1 is installed in the combustor 2 of the gas turbine 4.
The compressed air and the fuel f are sent. The air and the fuel f compressed by the compressor 1 are sent to the combustor 2, and the combustor 2
The turbine 3 is driven by the combustion gas from the compressor 1
And the power of the generator 5.

A part of the compressed air is extracted from the middle of the compressor 1 (extraction section) and sent to the extraction passage 6. The extraction passage 6 is connected to the inlet of the compressor 1. An existing extraction port or the like is applied to a portion for extracting a part of the compressed air. An air cooler 7 as a cooling means is provided in the extraction passage 6, and the compressed air flowing through the extraction passage 6 is cooled by the air cooler 7. The compressed air cooled by the air cooler 7 is mixed with the intake air at the inlet of the compressor 1 (mixed dilution cooling), and the air temperature of the intake air is lowered.

In the above-described compressor device, the bleed air from the intermediate portion of the compressor 1 is cooled by the air cooler 7 and mixed in the inlet portion of the compressor 1 to lower the air temperature of intake air. Since the air at the temperature is compressed, the compression power in the compressor 1 can be reduced.

As a result, the output of the gas turbine 4 is improved and the efficiency can be improved. Moreover, since the existing extraction port or the like is applied to connect the extraction passage 6, only the pipes forming the extraction passage 6 need to be additionally installed, and the compressor 1 need not be modified. Further, the heat recovered by the air cooler 7 can be used inside and outside the plant, and the thermal energy can be recovered.

A fifth embodiment will be described with reference to FIG. The same members as those of the second embodiment shown in FIG. 2 are designated by the same reference numerals.

As shown in the figure, a gas turbine 4 having a compressor 1 as a compressor, a combustor 2 and a turbine 3
And a generator 5 is coaxially connected to the gas turbine 4. A compressor 1 is installed in the combustor 2 of the gas turbine 4.
The compressed air and the fuel f are sent. The air and the fuel f compressed by the compressor 1 are sent to the combustor 2, and the combustor 2
The turbine 3 is driven by the combustion gas from the compressor 1
And the power of the generator 5.

A part of the compressed air is extracted from the middle (extraction section) of the compressor 1 and sent to the extraction passage 6. The extraction passage 6 is connected to the inlet of the compressor 1. An existing extraction port or the like is applied to a portion for extracting a part of the compressed air. An air cooler 7 as a cooling means is provided in the extraction passage 6, and the compressed air flowing through the extraction passage 6 is cooled by the air cooler 7.

An expansion turbine 9 is provided in the extraction passage 6 in the wake of the air cooler 7, and the compressed air cooled by the air cooler 7 is expanded at the inlet of the post compressor 1 after being expanded by the expansion turbine 9. (Mixed dilution cooling), the intake air temperature is lowered. The expansion turbine 9 is provided with a generator 10.

In the above-described compressor device, the bleed air from the middle part of the compressor 1 is cooled by the air cooler 7, the cooled compressed air is expanded by the expansion turbine 9 and mixed into the inlet part of the compressor 1. Since the intake air temperature is lowered, the air at a low temperature is compressed, and the compression power in the compressor 1 can be reduced. At the same time, power can be obtained by operating the expansion turbine 9.

As a result, the output of the gas turbine 4 is improved and the efficiency can be improved. Moreover, since the existing extraction port or the like is applied to connect the extraction passage 6, only the pipes forming the extraction passage 6 need to be additionally installed, and the compressor 1 need not be modified. In addition, the heat recovered by the air cooler 7 can be used inside and outside the plant, so that thermal energy can be recovered and pressure energy of the expansion turbine 9 can be recovered.

A sixth embodiment will be described with reference to FIG. The same members as those of the third embodiment shown in FIG. 3 are designated by the same reference numerals.

As shown in the figure, a gas turbine 4 having a compressor 1 as a compression device, a combustor 2 and a turbine 3.
And a generator 5 is coaxially connected to the gas turbine 4. A compressor 1 is installed in the combustor 2 of the gas turbine 4.
The compressed air and the fuel f are sent. The air and the fuel f compressed by the compressor 1 are sent to the combustor 2, and the combustor 2
The turbine 3 is driven by the combustion gas from the compressor 1
And the power of the generator 5.

A part of the compressed air is extracted from the middle of the compressor 1 (extraction section) and sent to the extraction passage 6. The extraction passage 6 is connected to the inlet of the compressor 1. An existing extraction port or the like is applied to a portion for extracting a part of the compressed air. An air cooler 7 as a cooling means is provided in the extraction passage 6, and the compressed air flowing through the extraction passage 6 is cooled by the air cooler 7.

An expansion turbine 9 is provided in the extraction passage 6 in the upstream of the air cooler 7, the extraction compressed air from the compressor 1 is expanded by the expansion turbine 9, and the air expanded by the expansion turbine 9 is air. It is cooled by the cooler 7 and mixed with the intake air at the inlet of the compressor 1 (mixed dilution cooling), and the air temperature of the intake air is lowered. The expansion turbine 9 is provided with a generator 10.

In the above-mentioned compressor device, the bleed air from the intermediate portion of the compressor 1 is expanded by the expansion turbine 9, the expanded air is cooled by the air cooler 7 and mixed at the inlet of the compressor 1. Since the temperature of the intake air is lowered, the air at a low temperature is compressed, and the compression power of the compressor 1 can be reduced. At the same time, power can be obtained by operating the expansion turbine 9.

As a result, the output of the gas turbine 4 is improved and the efficiency can be improved. Moreover, since the existing extraction port or the like is applied to connect the extraction passage 6, only the pipes forming the extraction passage 6 need to be additionally installed, and the compressor 1 need not be modified. In addition, the heat recovered by the air cooler 7 can be used inside and outside the plant, so that thermal energy can be recovered and pressure energy of the expansion turbine 9 can be recovered.

Although FIGS. 1 to 6 show the bleed air portion and the cooling air mixing portion one by one, the compressed air sent to the combustor 2 is cooled to be mixed between the stages, and at the same time, the intermediate portion. It is also possible to cool the air extracted from and mix it with the intake air.

The vertical axis of FIG. 7 represents the ratio (power ratio) between the power of the compressor in the above-described embodiment and the power of the compressor when bleeding is not performed. When 1 is selected, bleeding is not performed. It is shown that the compression power of the compressor and the compression power of the compression device in the above-described embodiment are equal. Further, the horizontal axis of FIG. 7 shows the ratio of the amount of extracted air to the amount of intake air of the compression device in the above-described embodiment (the extraction ratio).

The dotted line in the figure shows the relationship between the power ratio and the extraction rate when the cooling air is mixed by using the air cooler 7 shown in FIGS. 1 and 4, and the solid line in the figure shows FIGS. 5 and 6 show the relationship between the power ratio and the extraction ratio when air is mixed using the air cooler 7 and the expansion turbine 9.

In any case, it is understood that the power ratio can be lowered, that is, the compression power can be reduced as the extraction ratio is increased. In particular, as shown by the solid line, when air is mixed using the air cooler 7 and the expansion turbine 9, the power ratio can be lowered, that is, the compression power can be reduced even with a small amount of extracted air. I know what I can do.

A combined power generation facility in which a gas turbine facility equipped with the above-described air compressor and a steam turbine are combined will be described with reference to FIG. FIG. 8 shows a schematic configuration of a combined power generation facility according to an embodiment of the present invention. The same members as those shown in FIGS. 1 to 6 are designated by the same reference numerals.

As shown in FIG. 8, the compressor 1 and the combustor 2
And a gas turbine 4 having a turbine 3. A generator 5 is coaxially connected to the gas turbine 4.
The exhaust gas G from the gas turbine 4 is the exhaust heat recovery boiler 21.
The exhaust heat recovery boiler 21 is provided with an overheating unit (not shown) for each pressure.

In the exhaust heat recovery boiler 6, steam ST is generated via the superheat unit, and the generated steam ST is sent to the steam turbine 22 to work in the steam turbine 22. A generator 23 is coaxially connected to the steam turbine 22. The exhaust steam of the steam turbine 22 is condensed by a condenser 24, and the condensed water is supplied to a unit on the low pressure side of the exhaust heat recovery boiler 21 by a water supply pump 25 as a water supply means.

A part of the compressed air which is compressed by the compressor 1 and is sent to the combustor 2 is sent to the extraction passage 6 (extraction portion). Cooling means 26 is provided in the extraction passage 6, and the compressed air flowing through the extraction passage 6 is cooled by the cooling means 26. The extraction passage 6 is connected to a plurality of appropriate portions in the middle part of the compressor 1, and an existing extraction port or the like is applied to the portion to which the extraction passage 6 is connected.

The cooling means 26 will be described.

The cooling means 26 includes a fuel preheater 31, a steam generating heat exchanger (boiler) 32, and a hot water heat exchanger (boiler) 3.
3, an absorption refrigerator 34 and a cooler 35. In the fuel preheater 31, the compressed air is heat-exchanged with the fuel f, and the compressed air that has heated the fuel and recovered heat is sent to the steam generating heat exchanger (boiler) 32.

The absorption refrigerating machine 34 is operated by hot water, and the hot water for operating the absorption refrigerating machine 34 is supplied from the exhaust heat recovery boiler 21 after heat exchange with the hot water heat exchanger (boiler) 33. It The hot water from the absorption refrigerator 34 is converted to steam by the heat recovery of the compressed air in the steam generating heat exchanger (boiler) 32,
The steam generated in the steam generating heat exchanger (boiler) 32 is supplied to the steam turbine 22.

Further, part of the hot water from the absorption refrigerator 34 is sent to the second fuel preheater 36 to preheat the fuel f. The cold water from the absorption refrigerator 34 is sent to the cooler 35, and the cooler 35 cools the compressed air. A part of the air cooled by the cooler 35 is introduced into the inlet of the turbine 3 by the circulation fan 40 to cool the blades.

The high temperature compressed air sent to the extraction passage 6 is
Heat is recovered by the fuel preheater 31, the steam generating heat exchanger (boiler) 32, and further by the hot water heat exchanger (boiler) 33 and the cooler 35, and a plurality of appropriate parts in the middle part of the compressor 1 are recovered. Sent to the location. The water supplied from the exhaust heat recovery boiler 21 is converted into hot water by the hot water heat exchanger (boiler) 33, and the absorption refrigerator 34 is operated by this hot water. The cool water from the absorption refrigerator 34 cools the compressed air in the cooler 35.

In the combined power generation facility described above, the extraction air of the compressor 1 is supplied to the fuel preheater 31 and the steam generating heat exchanger (boiler) 3.
2. Cooling (heat recovery) by a cooling means 26 composed of a hot water heat exchanger (boiler) 33, an absorption refrigerator 34, and a cooler 35, and mixing at a plurality of appropriate parts in the middle part of the compressor 1. Since the intake air temperature is lowered, the air at a low temperature is compressed, and the compression power in the compressor 1 can be reduced. At the same time, the heat energy recovered by the cooling means 26 is transferred to the working steam of the steam turbine 22,
It can be used as hot water for operating the absorption refrigerator 34 and as fuel preheat.

It should be noted that the bleeding section (bleeding stage from the compressor 1) and the connecting section (cooling compressed air feeding stage) of the bleed channel 6 can be selected as desired, and cooled compressed air can be fed. The number of stages of the parts to be processed can also be arbitrarily selected.

As a result, the output and efficiency of the combined cycle power generation facility can be improved by improving the output of the steam turbine 22 and the fuel efficiency of the gas turbine 4 by preheating the fuel. Further, the compression power can be reduced by the interstage cooling (all-stage cooling) of the compressor 1, the output of the gas turbine 4 can be improved, and the efficiency can be improved. In addition, the extraction passage 6
When the connection part of is the intake part, the intake air of the compressor 1 can be cooled, and the output can be further improved.

Another embodiment of the combined power generation facility will be described with reference to FIG. FIG. 9 shows a schematic configuration of a combined cycle power generation facility according to another embodiment of the present invention. The same members as those shown in FIGS. 1 to 6 are designated by the same reference numerals. Further, the same members as those shown in FIG. 8 are designated by the same reference numerals, and the duplicated description is omitted. The fuel preheating system is omitted in FIG.

As shown in the figure, the turbine 3 is provided with recovery blades 41, 42 for recovering a cooling medium (air), sent to the extraction passage 6 and cooled (heat recovery) by the cooling means 26. The compressed air is sent to the collecting blades 41 and 42 to cool the blades and then is collected.

Upstream recovery blade 41 and downstream recovery blade 42
A second hot water heat exchanger (boiler) 43, which is a component of the cooling means 26, is provided between them, and the compressed air recovered from the recovery blades 41 is reduced by the second hot water heat exchanger (boiler) 43. After being heated, it is sent to the recovery blade 42 on the downstream side. The constituent elements of the cooling means 26 provided between the recovery blade 41 and the recovery blade 42 are examples, and other heat exchange means may be arranged.

The feed water from the exhaust heat recovery boiler 21 is sent to the second hot water heat exchanger (boiler) 43, and hot water is obtained by heat exchange with the compressed air recovered from the recovery blade 41. The obtained hot water is used as hot water for operating the absorption refrigerator 34 (see FIG. 8). When the recovery blade 41 and the recovery blade 42 are continuously provided, it is possible to use a series of compressed air (without reducing the temperature) without providing the second hot water heat exchanger (boiler) 43. is there.

The compressed air whose heat is sequentially recovered by the cooling means 26 is expanded by the first expansion turbine 46, the temperature of the air expanded by the first expansion turbine 46 is adjusted by the heat exchanger 47, and the intake air of the compressor 1 is taken. Mixed in. Further, the compressed air whose heat is sequentially recovered by the cooling means 26 is appropriately supplied to the middle stage of the compressor 1. At this time, the air expanded by the second expansion turbine 48 can be supplied to an intermediate stage.

The components of the cooling means 26 are disposed upstream of the first expansion turbine 46 and the second expansion turbine 48 to reduce the temperature, and the outlet sides of the first expansion turbine 46 and the second expansion turbine 48 are arranged. It is also possible to make the air temperature of the minus temperature.

As a result, the output and efficiency of the combined cycle power generation facility can be improved by improving the output of the steam turbine 22 and improving the fuel efficiency of the gas turbine 4 by preheating the fuel. Further, the compression power can be reduced by the interstage cooling (all-stage cooling) of the compressor 1, the output of the gas turbine 4 can be improved, and the efficiency can be improved. In addition, the extraction passage 6
When the connection part of is the intake part, the intake air of the compressor 1 can be cooled, and the output can be further improved.

Further, since the compressed air cooled (heat recovery) by the cooling means 26 is sent to the recovery blades 41 and 42, the blades of the turbine 3 are cooled even if the circulation fan 40 (see FIG. 8) is omitted. Therefore, the facility output and efficiency of the circulation fan 40 can be improved.

[0081]

According to the air compression method of the present invention, air is extracted from the compressor, and the extracted air is cooled and introduced upstream of the extraction unit, so that the air at a low temperature is compressed. Therefore, the compression power of the compressor can be reduced.

Further, the air compressor of the present invention for achieving the above object is an air compressor for compressing intake air, which is provided with a bleed unit for bleeding air, and the air extracted from the bleed unit is more than the bleed unit. Since the extraction passage is provided with the extraction passage to be sent to the upstream side, and the cooling means for cooling the extraction air is provided in the extraction passage, the air cooled by the cooling means is sent to the compressor and the low temperature air is compressed. Become. As a result, the compression power of the compressor can be reduced.

Since the extraction unit is provided at the outlet and the extraction flow path is connected to the intermediate unit, cooled air can be sent from the intermediate unit to the compressor.

Further, since the extraction part is provided in the middle part and the extraction flow path is connected to the inlet part, cooled air can be sent from the inlet part to the compressor to cool the intake air.

Further, since the expansion turbine is provided in the extraction passage, the expansion turbine can recover the power.

A gas turbine facility according to the present invention comprises an air compressor according to any one of claims 2 to 5, a combustor to which compressed air compressed by the air compressor and fuel are supplied. With the turbine operated by the combustion gas from the combustor, the air cooled by the cooling means is sent to the compressor, and the low temperature air is compressed, and the compression device capable of reducing the compression power is provided. Gas turbine equipment.

Since the cooling means is a fuel heating means for exchanging heat with the fuel supplied to the combustor, the combustion efficiency can be improved by heating the fuel.

Further, since the cooling means is a boiler that exchanges heat with the feed water to turn the feed water into steam, it is possible to utilize the steam.

Further, since the cooling means is a cooling means for exchanging heat with the cold water from the absorption refrigerator, it is possible to cool the air by utilizing the cold water.

Further, since the cooling medium recovery blade is provided in the turbine and the extraction passage is connected to the compressor side via the cooling medium recovery blade, air is supplied to the blade of the turbine to cool the blade. It can be performed.

The combined power generation equipment of the present invention is generated by the gas turbine equipment according to claim 8, an exhaust heat recovery boiler for recovering exhaust heat of the turbine of the gas turbine equipment to generate steam, and an exhaust heat recovery boiler. Steam and steam generated in the boiler of the gas turbine facility as a power source, a condenser for condensing the exhaust steam of the steam turbine, and a water supply for supplying the condensate of the condenser to the exhaust heat recovery boiler. Means, and the feed water of the exhaust heat recovery boiler is sent to the boiler of the gas turbine equipment, the air cooled by the cooling means is sent to the compressor, and the low temperature air is compressed to provide compression power. The combined power generation facility can be provided with a compression device that can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a gas turbine facility according to a first embodiment example of the present invention.

FIG. 2 is a schematic configuration diagram of gas turbine equipment according to a second embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of gas turbine equipment according to a third embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of gas turbine equipment according to a fourth embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of gas turbine equipment according to a fifth embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of gas turbine equipment according to a sixth embodiment of the present invention.

FIG. 7 is a graph showing the relationship between the power ratio and the extraction ratio.

FIG. 8 is a schematic configuration diagram of a combined cycle power generation facility according to an embodiment of the present invention.

FIG. 9 is a schematic configuration diagram of a combined cycle power generation facility according to another embodiment of the present invention.

[Explanation of symbols]

1 compressor 2 Combustor 3 turbine 4 gas turbine 5 generator 6 bleed passage 7 Air cooler 9 Expansion turbine 10 generator 21 Exhaust heat recovery boiler 22 Steam turbine 23 generator 24 condenser 25 water supply pump 26 Cooling means 31 Fuel preheater 32 Steam generating heat exchanger (boiler) 33 Hot water heat exchanger (boiler) 34 Absorption refrigerator 35 Cooler 36 Second fuel preheater 41,42 Recovery wing 43 Second hot water exchanger (boiler) 46 First Expansion Turbine 47 heat exchanger

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3G071 AA07 AB01 BA04 FA01 HA02                       JA03                 3G081 BA02 BA11 BB00 BC07 BD00                       DA14 DA21                 5H590 AA02 CA01 CA08 CA26 CA28

Claims (11)

[Claims] 1. An air compression method comprising extracting air from a compressor, cooling the extracted air, and introducing the cooled air to an upstream side of an extraction unit. 2. An air compressor for compressing intake air, comprising an extraction unit for extracting air, an extraction passage for sending air extracted from the extraction unit to an upstream side of the extraction unit, and cooling the extraction air. An air compression device comprising a cooling means in an extraction passage. 3. The air compressor according to claim 2, wherein the bleeding portion is provided at the outlet portion and the bleeding passage is connected to the intermediate portion. 4. The air compressor according to claim 2, wherein the bleeding portion is provided in the middle portion and the bleeding passage is connected to the inlet portion. 5. The air compression device according to claim 2, wherein an expansion turbine is provided in the extraction passage. 6. The air compression device according to claim 2, a combustor to which compressed air and fuel compressed by the air compression device are supplied, and a combustion gas from the combustor. And a turbine operated by the gas turbine equipment. 7. The gas turbine equipment according to claim 6, wherein the cooling means is a fuel heating means for exchanging heat with the fuel supplied to the combustor. 8. The gas turbine equipment according to claim 6, wherein the cooling means is a boiler that exchanges heat with the feed water to turn the feed water into steam. 9. The gas turbine equipment according to claim 6, wherein the cooling means is a cooling means for exchanging heat with the cold water from the absorption refrigerator. 10. The turbine according to any one of claims 6 to 9, wherein the turbine is provided with a cooling medium recovery blade, and the extraction passage is connected to the compressor side via the cooling medium recovery blade. Gas turbine equipment characterized in that. 11. The gas turbine equipment according to claim 8, an exhaust heat recovery boiler for recovering exhaust heat of a turbine of the gas turbine equipment to generate steam, and steam generated in the exhaust heat recovery boiler and gas turbine equipment. The steam turbine that uses steam generated in the boiler as a power source, a condenser that condenses the exhaust steam of the steam turbine, and a water supply unit that supplies the condensate of the condenser to the heat recovery steam generator Combined power generation facility characterized in that the feed water of the heat recovery boiler is sent to the boiler of the gas turbine facility.