JPH11241618A - Gas turbine power plant - Google Patents

Abstract

[PROBLEMS] To efficiently separate water vapor contained in exhaust gas in a carbon dioxide recovery type gas turbine plant. SOLUTION: Exhaust gas discharged from a gas turbine 4 is introduced into a condensation / separation device 20. Condensation separation device 20
Has a tube-type condenser 20A and a direct-contact condenser 20B provided downstream thereof. Condensation separation device 2
Exhaust gas from which water vapor is condensed and removed by 0, that is, carbon dioxide gas, is partially recovered, liquefied by a carbon dioxide liquefaction device 31, and then sprayed into a mist state in the direct contact condensing unit 20B. The liquefied carbon dioxide flashes in the direct contact condenser 20B and returns to low temperature carbon dioxide gas. The direct contact between the low-temperature carbon dioxide gas and the exhaust gas in the direct contact condensing section 20B allows the water vapor contained in the exhaust gas to be highly efficiently condensed. Exhaust gas sent to the compressor 9 becomes carbon dioxide gas containing almost no water, and power loss in the compressor 9 and damage to the compressor 9 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas turbine power plant, and more particularly to a combustion chamber in which a hydrocarbon fuel and oxygen are mixed and combusted to generate a combustion gas, and the combustion gas drives a gas turbine. Removing water in the exhaust gas from the turbine to high concentration carbon dioxide,
The present invention relates to a carbon dioxide recovery type gas turbine power plant that recovers and removes this carbon dioxide or returns the carbon dioxide to the combustor.

[0002]

2. Description of the Related Art A carbon dioxide recovery type gas turbine power plant has been conventionally known.
FIG. 7 shows a combined cycle type power plant disclosed in 145523.

In a gas turbine power plant shown in FIG. 7, fuel from a fuel supply device 1 is burned in a combustor 3 with oxygen from an oxygen production device 2, and the combustion gas is supplied to a gas turbine 4 and Is driven to rotate. The gas turbine 4 rotates a generator 5 coaxial with the gas turbine 4, and power is generated by the generator 5. Exhaust gas from the gas turbine 4 is sensible heat recovered by an exhaust heat recovery boiler 6, water vapor in the exhaust gas is condensed by a condenser 7, and further separated by steam / water by a steam / water separator 8. Carbon dioxide gas. This carbon dioxide gas is sent to the combustor 3 after being compressed by the compressor 9. Further, a part of the carbon dioxide gas sent to the compressor 9 is collected and processed by the carbon dioxide treatment device 30.

On the other hand, steam generated in the exhaust heat recovery boiler 6 is supplied to a steam turbine 10 and
Drive. Therefore, the generator 5 is rotationally driven not only by the gas turbine 4 but also by the steam turbine 10. The steam that has driven the steam turbine 10 is condensed by the condenser 11 and sent to the exhaust heat recovery boiler 6 by the feedwater pump 12.

[0005]

In such a carbon dioxide recovery type gas turbine power plant, the steam in the exhaust gas discharged from the exhaust heat recovery boiler 6 is condensed in the condenser 7 and the steam-water separator 8 Collected by on the other hand,
Part of carbon dioxide, which is an uncondensable gas, is treated by the carbon dioxide treatment device 14, and the remaining carbon dioxide is compressed by the compressor 9 and sent to the combustor 3.

At this time, if a large amount of water vapor remains in the exhaust gas, that is, carbon dioxide, moisture will be brought into the compressor 9 or the carbon dioxide treatment device 30, which means that the compressor 9 or the carbon dioxide treatment This causes power loss of the device 30. In addition, when a large amount of steam is brought into the compressor 9, the compressor 9 may be damaged.

[0007] As the condenser 7 for removing water vapor in the exhaust gas, a shell-and-tube type usually composed of a shell and a number of finned tubes provided therein is used. The exhaust gas flowing outside the tube of the condenser 7 is cooled by cooling water flowing inside the tube, and water vapor in the exhaust gas condenses on the outer surface of the finned tube.

However, since the exhaust gas contains a large amount of carbon dioxide gas, which is an uncondensable gas, sufficient condensing performance cannot be obtained simply by increasing the number of fins or increasing the fin height. A large amount of water vapor remains in the gas, that is, the carbon dioxide gas. To solve this problem,
When trying to improve the condensation performance by increasing the number of heat transfer tubes,
The condenser becomes very large and the power plant becomes expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and improves the condensation performance of a condenser and suppresses the amount of water introduced into a compressor or a carbon dioxide treatment device, thereby reducing power loss in these devices. It is intended to reduce compressor damage and reduce damage.

Another object of the present invention is to improve the condensation performance of the condenser, reduce the size of the condenser, and reduce the cost of the plant.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a combustor for mixing and burning fuel and oxygen, and a device which is driven by combustion gas from the combustor and emits carbon dioxide. A gas turbine that discharges exhaust gas containing water vapor, and a direct contact condenser that directly contacts a refrigerant with the exhaust gas discharged from the gas turbine to condense water vapor contained in the exhaust gas at least in part of the gas turbine. And a condensing / separating device for condensing and separating water vapor contained in exhaust gas.

[0012] Preferably, the refrigerant used in the direct contact type condensing section is obtained by cooling or liquefying carbon dioxide recovered from exhaust gas from which water has been removed by a condensing / separating device, or water, preferably condensing / separating. The condensed water condensed and separated in the apparatus is used.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas turbine power plant according to the present invention will be described below with reference to the drawings. In the following description of the embodiments, the same members as those of the related art are denoted by the same reference numerals.

[First Embodiment] First, a first embodiment will be described with reference to FIGS. FIG. 1 shows a schematic system of a combined cycle power plant including a gas turbine and a steam turbine driven by using exhaust heat of the gas turbine as an example of a gas turbine power plant according to the present invention. I have.

As shown in FIG. 1, a power plant according to this embodiment includes a fuel supply device 1 for supplying hydrocarbon fuel and an oxygen production device 2 for supplying oxygen, and the fuel supply device 1 and the oxygen production device A combustor 3 that mixes and burns fuel and oxygen from the fuel cell 2, a gas turbine 4 that is rotationally driven by combustion gas discharged from the combustor 3,
A generator 5 driven by the gas turbine 4.

The gas turbine 4 includes the gas turbine 4
An exhaust heat recovery boiler (exhaust heat recovery unit) 6 that recovers heat from exhaust gas discharged from the exhaust system is connected. A steam turbine 10 rotatably driven by water (working fluid) turned into steam by the heat recovery steam generator 6 is provided in the heat recovery steam generator 6.
And a condenser 11 that condenses steam discharged from the steam turbine 10 to return to water (liquid), and heats condensed water from the condenser 11 via a tube-type condenser 20A (details will be described later). A water supply pump 12 for returning to the recovery boiler 6 is sequentially connected.

The exhaust heat recovery boiler 6 is connected to a condensation / separation device 20 for condensing and separating water vapor contained in exhaust gas discharged from the exhaust heat recovery boiler 6. The condensing / separating device 20 includes a compressor 9 for compressing and returning the high-concentration carbon dioxide gas from which water is separated by the condensing / separating device 20, that is, the exhaust gas substantially regarded as carbon dioxide gas, to the combustor 3. It is connected.

A carbon dioxide treatment device 30 for recovering and treating excess carbon dioxide contained in exhaust gas is connected in the middle of a pipe 13 connecting the condensation / separation device 20 and the compressor 9. The carbon dioxide treatment device 30 has a carbon dioxide liquefaction device 31 for liquefying carbon dioxide, and a carbon dioxide treatment unit 32 for treating carbon dioxide liquefied by the carbon dioxide liquefaction device 31. The carbon dioxide liquefaction device 31 of the carbon dioxide treatment device 30 is connected to the direct contact type condensing unit 20 </ b> B (details will be described later) of the condensing / separating device 20 by a pipe 25.

Next, the condensing / separating apparatus 20 will be described in detail. As shown in FIG. 1 and FIG.
0 is a tube-type condenser 20A and a direct-contact condenser 20 that are sequentially arranged from the upstream side in the exhaust gas flow direction.
B and the water / water separation unit 20C, and details of their structures are shown in FIG.

As shown in FIG. 2, a tube type condenser 20A provided at the most upstream side of the condensation / separation device 20 has a shell 21 into which the exhaust gas from the exhaust heat recovery boiler 6 is introduced.
And a plurality of fin tubes (heat transfer tubes) 22 provided in the shell 21. In this example, the refrigerant passing through the fin tube 22 is condensed water cooled by the condenser 11 as can be seen from FIG. Below the first shell 21, a reservoir 21a is provided. That is, in the present embodiment, the tube-type condenser 20A takes the form of a so-called shell-and-tube condenser.

The direct contact condenser 20B is connected to the passage 2
3 has a shell 24 connected to the shell 21 of the tubular condenser 20A. At the top of the shell 24,
A conduit 25 communicating with the carbon dioxide liquefier 31 is connected. A spray nozzle 26 is provided at an end of the pipe 25 on the shell 24 side. Note that in FIG.
A member indicated by a dashed line is an expansion valve used when a gaseous refrigerant is supplied to the direct contact condensing section 20B as in a second embodiment described later, and is used in the present embodiment. Absent.

The steam separator 20C has a shell 28 connected to the shell 24 of the direct contact condenser 20B by a passage 27. A baffle plate 29 shown schematically is provided in this shell. The steam-water separation unit 2
The OC may have a steam / water separation filter at the outlet of the shell 28. That is, the steam-water separation unit 2
0C adopts the same configuration as the configuration of the steam-water separator known per se.

A drain pipe 39 is connected to the tube type condenser 20A, the direct contact condenser 20B and the steam separator 20C.

Next, the operation of the present embodiment having the above configuration will be described. As shown in FIG.
Is burned in the combustor 3 with oxygen from the oxygen producing device 2, and the combustion gas is supplied to the gas turbine 4 to rotate the gas turbine 4. The gas turbine 4 rotates a generator 5 coaxial with the gas turbine 4 to generate power. Exhaust gas discharged from the gas turbine 4 is sensible heat recovered by the exhaust heat recovery boiler 6 and introduced into the condensation / separation device 20.

The exhaust gas from which water has been sufficiently removed by the condensing / separating apparatus 20, that is, the exhaust gas substantially consisting of carbon dioxide gas is sent to the compressor 9 where it is repressurized and returned to the combustor 3. Exhaust gas is partially extracted (increased by combustion) on the way from the condensation / separation device 20 to the compressor 9 and is liquefied by a carbon dioxide liquefaction device 31 provided in the carbon dioxide treatment device 30. Part of the liquefied carbon dioxide is sent to the carbon dioxide processing unit 32 and processed there. On the other hand, a part of the liquefied carbon dioxide is sent to the direct contact condensing unit 20B of the condensing / separating device 20,
Used as a refrigerant.

On the other hand, the steam turbine 10 is driven by steam (working fluid of a steam turbine system) heated by the exhaust heat recovery boiler 6. The steam leaving the steam turbine is
It is condensed by the condenser 11. Then, the condensed water is returned to the exhaust heat recovery boiler 6 by the feedwater pump 12 through the tube-type condensing unit 20A of the condensing / separating device 20. In this case, in the tube-type condensing section 20A, heat exchange is performed between the exhaust gas whose temperature has been reduced to some extent in the exhaust heat recovery boiler 6 and the relatively low temperature water. In this case, the relatively high-temperature exhaust gas immediately after leaving the gas turbine and the tube-type condenser 20A
The heat exchange is performed with the water whose temperature has increased to some extent by the heat exchange in the above.

Next, the action of separating moisture from exhaust gas performed in the condensation / separation device 20 will be described with reference to FIGS.
This will be described in more detail with reference to FIG. The exhaust gas discharged from the gas turbine 4 and passing through the exhaust heat recovery boiler 6 substantially contains carbon dioxide gas and water vapor. This exhaust gas is supplied to the tube-type condensing section 2 constituting the condensing / separating device 20.
Pass through 0A first.

In the shell 21 of the tube type condenser 20A, part of the water vapor contained in the exhaust gas
It condenses on the outer surface of the fin tube 22 arranged in the inside. Most of the condensed water falls into the reservoir 21a. The remaining portion of the condensed water flows into the direct contact condensing section 20B together with the exhaust gas in the form of droplets. Therefore, the exhaust gas flowing into the shell 24 of the direct contact condensing unit 20B is a multiphase flow including carbon dioxide gas, water vapor, and droplets.

Next, the liquefied carbon dioxide sent from the carbon dioxide liquefaction device 30 is sprayed into the shell 24 of the direct contact condenser 20B in the form of a mist by the nozzle 26, and is thereby flashed to cool the low-temperature carbon dioxide. It becomes gas. The exhaust gas introduced from the tube-type condenser 20A is directly cooled by the low-temperature carbon dioxide and condensed.

In this case, since the liquefied carbon dioxide is injected in a mist state, the contact area between the carbon dioxide and the exhaust gas becomes enormous, and very high condensation performance can be obtained. Therefore, most of the water vapor contained in the exhaust gas is condensed into droplets in the shell 24 of the direct contact condenser 20B.

Most of the condensed water falls below the shell 24. Further, the remaining portion of the condensed water flows into the steam-water separation unit 20C together with the exhaust gas in the form of droplets. Steam-water separation unit 2
In the OC shell 28, the droplets contained in the exhaust gas fall below the shell 28 by the action of the baffle plate 29. Therefore, the exhaust gas discharged from the steam-water separation unit 20C is a high-concentration carbon dioxide gas containing almost no water.

The water separated in the tube type condenser 20A, the direct contact condenser 20B and the steam separator 20C is recovered and reused by a suitable water recovery device (not shown), or Discarded.

In the embodiment shown in FIG. 1, the carbon dioxide gas is extracted before reaching the compressor 9 and sent to the carbon dioxide liquefaction apparatus 31, but the present invention is not limited to this. . That is, the carbon dioxide gas may be compressed by the compressor 9 and then extracted before returning to the combustor 3 and sent to the carbon dioxide liquefaction device 31 (see the two-dot chain line in FIG. 1). In this way, the power required for the carbon dioxide pressurization step normally required in the liquefaction process in the carbon dioxide liquefaction apparatus 31 can be reduced.

Further, instead of sending liquefied carbon dioxide to the direct contact condenser 20B of the condensation / separation device 20, low-temperature carbon dioxide gas generated in the liquefaction process in the carbon dioxide liquefaction device 31 may be sent. .

In the above embodiment, the tube type condenser 20A, the direct contact condenser 20B and the steam-water separator 20C which constitute the condenser / separator 20 each have a dedicated shell separated from each other. However, the present invention is not limited to this. That is, the condensing / separating device 20 may be configured such that at least two of the tubular condensing unit 20A, the direct contact condensing unit 20B, and the steam / water separating unit 20C share one shell.

Further, in the embodiment shown in FIG. 1, the gas turbine power plant is of the combined cycle type, but the power plant to which the present invention is applied is as follows.
As shown in FIG. 3, a system not including a steam turbine may be used. In this case, as shown in FIG.
A part of the condensed water discharged from the direct contact type condenser 20B is supplied as a refrigerant flowing into the inside of the tube type condenser 2B.
The refrigerant (water) that has passed through the fin tube 22 of 0 A is supplied to the combustor 3. As a matter of course, also in the embodiment shown in FIG.
May be supplied by a cooling water supply device separated from the working fluid system of the steam turbine.

As described above, according to the present embodiment, since the water contained in the exhaust gas can be removed with high efficiency by the condensation / separation device 20, the amount of water brought into the compressor 9 can be greatly reduced. Can be reduced. For this reason, the power loss in the compressor 9 can be reduced,
Further, damage to the compressor 9 can be suppressed. Also,
The power loss of the carbon dioxide liquefaction device 31 can be reduced by reducing the amount of water in the exhaust gas.

Further, according to the present embodiment, the liquefied carbon dioxide supplied to the direct contact condensing unit 20B is usually provided in the carbon dioxide treatment device 30 for recovering excess carbon dioxide generated by combustion. Carbon dioxide liquefaction unit 31
Supplied by That is, since the carbon dioxide liquefaction apparatus 31 is not provided only to generate the liquefied carbon dioxide supplied to the direct contact condensing unit 20B, the complexity and cost increase of the plant can be minimized.

Further, according to the present embodiment, the direct contact condenser 20B having a high condensation ability is provided downstream of the tubular condenser 20A constituting the condenser 20. For this reason, it is not necessary to increase the number of fin tubes (heat transfer tubes) 22 of the tubular condensing section 20A in order to improve the condensation and separation performance of the entire condensation and separation device 20. Therefore, the size of the condensing / separating device 20 can be reduced, and the cost of the plant can be significantly reduced.

Since the direct contact condenser 20B of the condenser 20 has a very high condensation performance by itself, the condenser 20 is not necessarily a tube condenser 2B.
0A, it is not necessary to have a direct contact condenser 20B.
Alternatively, the condensation / separation device 20 may be constituted only by the steam / water separation unit 20C. Tube type condenser 20
Whether or not to provide A is determined from a comprehensive point of view in consideration of a plant system, required performance, and the like.

[Second Embodiment] Next, a second embodiment will be described with reference to FIG. In the second embodiment, the first
The second embodiment is different from the first embodiment in the method of recovering carbon dioxide and the method of supplying the carbon dioxide to the direct contact condensing unit 20B. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals,
Duplicate description will be omitted.

As shown in FIG. 4, an exhaust gas flowing through the pipe 13 (this exhaust gas substantially consists of carbon dioxide gas) ), A part of which is recovered and compressed.
And a cooler (carbon dioxide cooler) 36 connected to the compressor 35 and cooling the exhaust gas compressed by the compressor 35, that is, carbon dioxide. Cooler 3
6 is directly connected to the contact type condenser 20B via a line 25. In the present embodiment, the conduit 25 includes
An expansion valve 25a (shown by a broken line in FIG. 2) is provided.

The exhaust gas discharged from the gas turbine 4 is recovered by the waste heat recovery boiler 6 with sensible heat. And
Moisture in the exhaust gas is condensed and removed by the condensing and separating device 20. The exhaust gas from which water has been removed by the condensing / separating device 20, that is, the carbon dioxide gas, is sent to the compressor 9 and repressurized. Between the condensing / separating device 20 and the compressor 9, a part of the carbon dioxide gas increased by the combustion is extracted and processed by the carbon dioxide processing device 30.

In this embodiment, the condensation / separation device 20
A part of the exhaust gas, that is, the carbon dioxide gas, which has exited the pipe 13 is extracted in the middle of the pipe 13 and sent to the compressor 35.
The carbon dioxide gas compressed by the compressor 35 is cooled (heat radiated) by the cooler 36, and then passes through the pipe 25 provided with the expansion valve 25 a, and then is passed through the shell of the direct contact type condensing portion 20 B of the condensing / separating device 20. Returned to 24.

The carbon dioxide gas returned to the shell 24 is
The temperature is further lowered by adiabatic expansion, and the shell 24 comes into direct contact with the exhaust gas flowing into the shell 24 from the tubular condenser 20A. Thereby, the moisture in the exhaust gas from the tube-type condenser 20A is condensed.

In this case, the contact area between the adiabatic expanded carbon dioxide gas and the exhaust gas whose temperature has been reduced becomes enormous, so that a very high condensation performance can be obtained. Therefore, also in the present embodiment, the same effect as in the first embodiment can be obtained.

In the present embodiment, the process from the recovery of carbon dioxide to the release to the direct contact condenser 20B can be used as a process for liquefying carbon dioxide. Depending on the conditions, the configuration of the present embodiment can also supply carbon dioxide to the direct contact condenser 20B under liquid conditions. Further, in the embodiment shown in FIG. 4, the exhaust gas, that is, the carbon dioxide gas to be returned to the tube-type condenser 20A is extracted between the condensing / separating device 20 and the compressor 9, but the invention is not limited to this. Not something. That is, the carbon dioxide gas may be extracted after the compressor 9 compresses the exhaust gas (see the two-dot chain line in FIG. 4). By doing so, the power required to drive the compressor 35 can be reduced, and in some cases, the compressor 35 can be omitted.

[Third Embodiment] Next, a third embodiment will be described with reference to FIG.

The third embodiment differs from the first embodiment in that the recovered carbon dioxide is supplied to the direct contact type condenser 20B as a refrigerant, but the water condensed and separated by the condensing / separating device 20 is used. Is supplied as a refrigerant to the direct contact type condensing section 20B, and the rest is substantially the same as the first embodiment. In the third embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and overlapping description will be omitted.

As shown in FIG. 5, in the third embodiment, a water supply pump 37 and a water cooling device 38 are sequentially connected to a drain pipe 39 (see FIG. 2) of the condensation / separation device 20. And the water cooling device 38 is connected to the pipe 25 connected to the direct contact condenser 20B.

The exhaust gas discharged from the gas turbine 4 is recovered by the waste heat recovery boiler 6 with sensible heat. And
Moisture in the exhaust gas is condensed and removed by the condensing and separating device 20. The exhaust gas from which water has been removed by the condensing / separating device 20, that is, the carbon dioxide gas, is sent to the compressor 9 and repressurized. Between the condensing / separating device 20 and the compressor 9, the carbon dioxide gas increased by the combustion is extracted and processed by the carbon dioxide processing device 30.

In this embodiment, the condensing / separating device 20
The water condensed and separated from the exhaust gas in the above is cooled by a water cooling device 38 to be supercooled water, and the water supply pump 37
Pressure of the direct contact type condensing section 20
Sent to B. The supercooled water is supplied to the direct contact condenser 20
In B, it is sprayed into the shell 24 in the form of a mist by the nozzle 26 (see FIG. 2).

The water vapor contained in the exhaust gas flowing into the shell 24 (see FIG. 2) of the direct contact type condenser 20B from the tube condenser 20A directly condenses with the sprayed supercooled water.

In this case, since the supercooled water is sprayed in the form of a mist, the contact area between the supercooled water and the exhaust gas becomes enormous, so that a very high condensation performance can be obtained. For this reason, also in the present embodiment, the same effect as in the first embodiment can be obtained.

In the above embodiment, the water sent as the refrigerant to the direct contact type condensing section 20B is recovered by the condensing / separating device 20, which is useful for protecting water resources. However, the present invention is not limited to this. That is, the water sent to the direct contact condensing unit 20B is:
It may be supplied by an independent water supply system.

Further, in the embodiment shown in FIG. 5, the gas turbine power plant is of the combined cycle type, but the power plant to which the present invention is applied is:
As shown in FIG. 6, a system not including a steam turbine may be used. In this case, as shown in FIG.
A part of the condensed water discharged from the direct contact type condenser 20B is supplied as a refrigerant flowing into the inside of the tube type condenser 2B.
The refrigerant (water) that has passed through the fin tube 22 of 0 A is supplied to the combustor 3. Of course, also in the embodiment shown in FIG.
May be supplied by a cooling water supply device separated from the working fluid system of the steam turbine.

[0057]

As described above, according to the present invention,
The gas turbine power plant is equipped with a condensing / separating device that can efficiently remove water vapor contained in exhaust gas, so that power loss of the compressor can be reduced and damage to the compressor can be suppressed. it can. Further, since the size of the condensing / separating device can be reduced, the cost of the plant can be reduced.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a gas turbine power plant according to the present invention.
The schematic system diagram which shows embodiment of FIG.

FIG. 2 is a schematic cross-sectional view illustrating a configuration of a condensation and separation device according to the first embodiment.

FIG. 3 is a schematic system diagram showing a modification of the first embodiment.

FIG. 4 shows a second embodiment of the gas turbine power plant according to the present invention.
The schematic system diagram which shows embodiment of FIG.

FIG. 5 shows a third embodiment of the gas turbine power plant according to the present invention.
The schematic system diagram which shows embodiment of FIG.

FIG. 6 is a schematic system diagram showing a modification of the third embodiment.

FIG. 7 is a schematic configuration diagram of a conventional gas turbine power plant.

[Explanation of symbols]

 3 Combustor 4 Gas Turbine 6 Exhaust Heat Recovery Unit 9 Compressor 10 Steam Turbine 20 Condensing and Separating Device 20B Direct Contact Condensing Unit 31 Carbon Dioxide Liquefaction Device 35 (Second) Compressor 36 Carbon Dioxide Cooler 38 Water Cooling Device

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI F02C 3/30 F02C 6/00 E 6/00 B01D 53/34 135Z (72) Inventor Masafumi Fukuda One Shibaura, Minato-ku, Tokyo No. 1-1, Toshiba Corporation Headquarters Office (72) Inventor Yukio Ohashi 1 Toshiba, Komukai Toshiba-cho, Yuki-ku, Kawasaki City, Kanagawa Prefecture Toshiba R & D Center

Claims (12)

[Claims] 1. A combustor for mixing and burning fuel and oxygen, and driven by combustion gas from the combustor,
A gas turbine that discharges exhaust gas containing carbon dioxide and water vapor, and at least a direct contact condenser that directly contacts a refrigerant with the exhaust gas discharged from the gas turbine to condense water vapor contained in the exhaust gas. A gas turbine power plant, comprising: a condensing / separating device for condensing and separating water vapor contained in exhaust gas, which is included in a part thereof. 2. The compressor according to claim 1, further comprising a compressor for compressing an exhaust gas substantially consisting of carbon dioxide gas from which water vapor has been separated by said condensation / separation device and returning it to said combustor. A gas turbine power plant as described. 3. The method according to claim 1, wherein the refrigerant used in the direct contact condensing section is a refrigerant obtained by collecting and cooling or liquefying carbon dioxide gas contained in exhaust gas. A gas turbine power plant as described. 4. The carbon dioxide liquefaction apparatus further comprising a carbon dioxide liquefaction apparatus provided downstream of the condensation and separation device with respect to the flow of the exhaust gas, for recovering and liquefying the exhaust gas substantially consisting of carbon dioxide gas. 4. The gas turbine power plant according to claim 3, wherein at least one of liquefied carbon dioxide and low-temperature carbon dioxide generated in the liquefaction process is supplied as a refrigerant to the direct contact condensing unit. . 5. The gas turbine power plant according to claim 4, wherein the liquefied carbon dioxide is sprayed in the form of a mist when supplied to the direct contact condenser as a refrigerant. 6. A carbon dioxide cooler for cooling exhaust gas substantially consisting of carbon dioxide gas compressed by said compressor, wherein said carbon dioxide is compressed and cooled by said compressor and said carbon dioxide cooler. 4. The gas turbine power plant according to claim 3, wherein the gas is supplied as a refrigerant to the direct contact condensing unit. 7. A second compressor for recovering and compressing exhaust gas substantially consisting of carbon dioxide gas downstream of the condensation / separation device with respect to the flow of exhaust gas, and compressing the second compressor by the second compressor. A carbon dioxide cooler that cools the exhaust gas that has been compressed, wherein the carbon dioxide compressed and cooled by the second compressor and the carbon dioxide cooler is supplied to the direct contact condensing unit as a refrigerant. The gas turbine power generation plant according to claim 3, wherein: 8. The gas turbine power plant according to claim 1, wherein the refrigerant used in the direct contact condenser is water. 9. A water cooling device for collecting and cooling water separated from exhaust gas by the condensation / separation device, wherein the water cooled by the water cooling device is used as a refrigerant in the direct contact condenser. The gas turbine power plant according to claim 8, characterized in that it is supplied. 10. The gas turbine power plant according to claim 9, wherein when the water is supplied as a refrigerant to the direct contact condenser, the water is sprayed in a mist state in a supercooled state. 11. The condensing / separating apparatus further includes a tube-type condensing unit provided on the upstream side of the direct contact-type condensing unit with respect to the flow of exhaust gas and having a heat transfer tube. The heat exchange is performed between exhaust gas discharged from the gas turbine via a heat pipe and a refrigerant in the heat transfer pipe, and steam contained in the exhaust gas is condensed. 1
0. A gas turbine plant according to any one of the above items. 12. A gas turbine according to claim 12, wherein said exhaust gas is provided downstream of said gas turbine and upstream of said condensing and separating device.
The exhaust heat recovery device that heats a working fluid by exchanging heat with exhaust gas discharged from the gas turbine, and a steam turbine driven by the working fluid, further comprising: A gas turbine power plant according to any one of the above.