JPH03100095A - Power plant with carbon dioxide separator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a power plant including a gas turbine consisting of an air compressor, a combustor, and a turbine, and in particular to a power plant that reduces carbon dioxide emitted from the gas turbine. The present invention relates to a power plant having a carbon dioxide separation device suitable for.

[Conventional technology]

Conventionally, as for a method of separating carbon dioxide from a power plant, a method has been proposed that separates carbon dioxide from the battery anode exhaust gas of a fuel cell power plant, as described in Japanese Patent Application Laid-Open No. 63-211571. has been done.

[Problems to be Solved by the Invention] The above conventional technology is aimed at fuel cell power generation plants, and takes into account the fact that carbon dioxide is required for the electrochemical reaction of the fuel cell, and the carbon dioxide concentration in the battery anode exhaust gas is high. However, this method involves a carbon dioxide separation device in the anode exhaust gas, and there is a problem in that it cannot be applied to plants that do not use fuel cells.

A first object of the present invention is to provide a power plant having a carbon dioxide separation device that can reduce the amount of carbon dioxide generated by a power plant including a gas turbine.

A second object of the present invention is to provide a power plant having a carbon dioxide separator that fixes carbon dioxide and facilitates carbon dioxide discharge treatment.

Furthermore, a third object of the present invention is to provide a power plant having a carbon dioxide separator that recovers carbon dioxide and uses it as a power source, thereby making it possible to consume less power.

[Means to solve the problem]

In order to achieve the above first object, the carbon dioxide separation power plant of the present invention is a power plant including a gas turbine consisting of an air compressor, a combustor, and a turbine, and is provided between a fuel supply device and the combustor. The plant includes a carbon dioxide separation device that separates carbon dioxide contained in the fuel from the fuel supply device and discharges it outside the plant system.

Furthermore, in order to further reduce the amount of carbon dioxide emitted, the carbon dioxide separator is configured to absorb and separate carbon dioxide contained in the fuel using an absorption liquid.

In addition, in order to further reduce carbon dioxide emissions, the carbon dioxide separation device reduces the concentration of carbon dioxide by causing a shift reaction between carbon monoxide contained in the fuel from the fuel supply device and steam using a shift reaction catalyst. It is connected to a shift reactor that increases the temperature.

In addition, in order to achieve the second object, the power plant having the carbon dioxide separator includes a device for fixing carbon dioxide separated by the carbon dioxide separator by heat exchange with fuel from a fuel supply device. It is equipped with the following.

Further, in order to achieve the second objective, the power plant having the carbon dioxide separation device fixes carbon dioxide separated by the carbon dioxide separation device by heat exchange with fuel from the fuel supply device. It is equipped with a device.

In addition, in order to increase the operational efficiency of power plants and separate carbon dioxide without installing special carbon dioxide separation equipment, power plants that include gas turbines consisting of air compressors, combustors, and turbines are equipped with fuel supply equipment. It is arranged between the combustor and the fuel supply device, and separates hydrogen contained in the fuel from the fuel supply device, and exchanges heat with the fuel containing carbon dioxide from which the hydrogen has been separated, with the fuel from the fuel supply device. It has a carbon dioxide separation device that fixes carbon dioxide.

In addition, in order to achieve the third object, a power plant having a carbon dioxide separation device of the present invention includes a gas turbine including an air compressor, a combustor, and a turbine, and a fuel supply device and the above-mentioned gas turbine. A carbon dioxide absorption device is placed between the combustor and uses an absorption liquid to absorb and separate carbon dioxide contained in the fuel from the fuel supply device, and the carbon dioxide absorption device absorbs and separates carbon dioxide from the absorption liquid that has absorbed carbon dioxide. The device includes a regenerator that separates carbon, and a power recovery turbine that is disposed between the regenerator and the carbon dioxide absorption device and powered by the absorption liquid from the carbon dioxide absorption device.

[For production]

The present invention relates to a power plant including a gas turbine including an air compressor, a combustor, and a turbine, which is disposed between a fuel supply device and the combustor, and which absorbs carbon dioxide contained in the fuel from the fuel supply device. Since a carbon dioxide separator for separating carbon dioxide is provided, the amount of carbon dioxide emitted in the gas turbine exhaust gas can be reduced.

When the fuel for the gas turbine mentioned above is a general fuel such as natural gas or naphtha, the fuel does not contain carbon dioxide, so it is passed through a fuel reformer and converted into hydrogen and carbon monoxide by a reforming reaction. , carbon dioxide can be separated.

Furthermore, as mentioned above, in fuels containing carbon monoxide such as fuel gas and coal gasified fuel that have passed through a reformer, it is necessary to include a shift catalyst in order to further reduce the amount of carbon dioxide emissions in the exhaust gas. By increasing the carbon dioxide concentration in the fuel by passing it through the shift converter, the separation rate of carbon dioxide can be increased.

For fuel gases containing hydrogen, hydrogen can be separated and used as gas turbine fuel, and carbon dioxide can be separated from other components.

Since carbon dioxide turns into dry ice at -78°C, it can be easily converted into dry ice and fixed by heat exchange with liquefied natural gas (temperature -160°C).

In addition, low-temperature heat in oxygen plants, such as liquefied nitrogen (-
It can also be easily converted into dry ice and fixed by heat exchange with liquefied oxygen (-183°C).

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be explained below with reference to FIG.

As shown in FIG. 1, the gas turbine includes an air compressor 1,
It is composed of a combustor 2 and a turbine 3. When the air compressor 1 is driven by the turbine 3, it compresses the atmospheric air from the air passage 30 and supplies it to the combustor 2 through the pipe 31. The combustor 2 burns the fuel gas supplied from the pipe line 26 using compressed air from the air compressor 1 and supplies it to the turbine 3 . The turbine 3 generates power from the high temperature and high pressure combustion gas from the combustor 2 and drives the air compressor 1 and the generator 8,
The used combustion gas is supplied through a pipe 33 to a reformer 6 containing an improved catalyst and an exhaust heat recovery boiler 14, and then exhausted through an exhaust pipe 34. The air compressor 1 and the generator 8 are connected to a steam turbine 9. The steam turbine 9 is driven by steam supplied from the exhaust heat recovery boiler 14, supplies the used steam to the heat exchanger 17, passes through the exhaust pipe 2I to the mixer 11, and supplies the steam to the mixer 11 through the exhaust pipe 2I. supply to. The water supplied to the condenser IO is heated and evaporated by the exhaust gas in the exhaust heat recovery boiler 14 to drive the steam turbine 9 and the shift converter 7.
supplied to

In this embodiment, the fuel supply device 4 is configured as a storage tank for liquefied natural gas, and supplies the liquefied natural gas to the heat exchanger 1.
Supply to 3. The heat exchanger 13 exchanges heat with the liquefied natural gas from the fuel supply device 4 and carbon dioxide supplied through the pipe line 27 to vaporize it, and supplies the gas to the heat exchanger 17 through the pipe line 20. At the same time, carbon dioxide is turned into dry ice by the vapor latent heat of the liquefied natural gas and is discharged to the outside of the system through the pipe 28. The steam heat exchanger 17 is the same as the heat exchanger 13 above.
Natural gas is heated by the steam extracted from the steam turbine 9 and supplied to the mixing chamber 11. The mixing chamber 11 mixes the natural gas from the heat exchanger 17 with extracted steam supplied from the steam turbine 9 through piping 21, and then supplies the mixture to the heat exchanger 12 through piping 22. The heat exchanger 12 heat-exchanges the mixed gas of natural gas and steam from the mixing chamber 11 with the high-temperature fuel gas from the reformer 6 to raise the temperature, and then supplies the mixture to the reformer 6; The fuel gas, which has become low temperature through heat exchange, is supplied to the shift converter 7 through the pipe line 23.

The reformer 6 is heated indoors to a high temperature state by the exhaust gas from the turbine 3, and in this state, the natural gas and steam from the heat exchanger 12 undergo a reforming reaction to produce hydrogen, carbon monoxide, and dioxide. Decomposes into carbon.

The reforming reaction at this time is CH4+H,0,3H*+C0 CH4+2H! It is expressed as ○+ 4H1+CO*, and the higher the temperature and the more water vapor there is, the more the ratio of hydrogen and carbon dioxide increases. The effects of these on the amount of reduction in carbon dioxide will be discussed later.

In this way, the reformed material in the reformer 6 is supplied as fuel to the heat exchanger 12 again, and after being heated to a mixed gas of natural gas and steam and reduced to a low temperature, the pipe 23 is and is supplied to the shift converter 7. The shift converter 7 uses the steam from the exhaust heat recovery boiler 14 to cause a shift reaction between the rare carbon oxide and residual steam contained in the low-temperature fuel from the heat exchanger 12 using a shift reaction catalyst. The shift reaction at this time is CO+H, O, -H, +CO.

Do this. In this shift reaction, more hydrogen and carbon dioxide are generated as the temperature of the fuel becomes lower in the heat exchanger 12, but the operating temperature of the shift reaction catalyst is CuO, ZuO, /l, O, which is a general catalyst.

The system temperature is about 180°C, and usually about 220°C is appropriate.

The fuel that has passed through the shift converter 7 is supplied to the carbon dioxide separator. The carbon dioxide separator is a regenerator 1
The fuel passing through the shift converter 7 is supplied to the regenerator 15 and gives heat to the regenerator 15.
It is supplied to the carbon dioxide absorption device 5. In the carbon dioxide absorption device 5, an alkaline aqueous solution for absorbing carbon dioxide is injected into the fuel gas, and the carbon dioxide is absorbed into the alkaline aqueous solution. This absorption process takes place at temperatures between 30°C and 50°C.
A high pressure of about 30 ata at a low temperature of about °C is suitable, and the pressure is optimal for a gas turbine fuel supply system (20 to 25 ata for a gas turbine for power generation).

The fuel from which carbon dioxide and water vapor have been separated due to the low temperature in the carbon dioxide absorption device 5 is introduced into the combustor 2 through the pipe 26, and the absorption liquid that has absorbed carbon dioxide passes through the pipe 25 into the combustor 2. It is supplied to the heat exchanger 16. The heat exchanger 16 exchanges heat with the regenerated liquid from the regenerator 15 to raise the temperature of the absorbent liquid, and then supplies the absorbed liquid to the regenerator 15 .

The regenerator 15 reduces the pressure of the absorption liquid, further heat exchanges with the fuel from the shift converter 7 to raise the temperature, and supplies the separated carbon dioxide to the heat exchanger 13, where the carbon dioxide is separated. The regenerated liquid is supplied to the carbon dioxide absorption device 5 through the heat exchanger 16.

In the first embodiment, since the structure is as described above, the carbon component that becomes carbon dioxide is transferred to the combustor 2 in advance.
Carbon dioxide can be absorbed and separated by the carbon dioxide absorption device 5 in the fuel stage before being supplied to the fuel. In this case, the reduction rate of carbon dioxide is determined by the temperature during reforming in the reformer 6,
The number of carbon moles C in the natural gas in the mixer 11 can be calculated by the ratio s/c of the number of moles S of the steam to be mixed.

The results of this calculation are shown in FIG. As shown in Figure 2, if the reforming temperature is 700°C and the s/c is 3.0, the carbon emissions in the exhaust gas will be 55% of the 100% carbon dioxide emissions during normal methane combustion. can be suppressed to

Further, the reforming reaction in the reformer 6 is an endothermic reaction,
Since the reformer 6 is installed at the inlet of the exhaust heat recovery boiler 14 and uses the heat of the combustion gas from the turbine 3, the amount of heat recovered in the exhaust heat recovery boiler 14 decreases, but the reformer 6 The reaction increases the calorific value of the fuel.

By employing the first embodiment, carbon dioxide is discharged as dry ice, so the system efficiency is lower than in the case where all carbon dioxide is recovered and used as a power source for the turbine 3. However, the decrease in system efficiency
The pressure energy of carbon dioxide and steam in the carbon dioxide absorption process is the main one, and thermal losses can be recovered by heat exchange within the system.

Therefore, in this embodiment, the amount of carbon dioxide discharged from the gas turbine can be reduced by separating carbon dioxide while minimizing the reduction in efficiency.

Note that in this first implementation, a single-shaft combined plant in which the shaft of the turbine 3 is connected to the generator 8 and the steam turbine 9 is shown, but the invention is not limited to this, and for example, a multi-shaft combined plant may be used. , it can also be applied to a single gas turbine.

Next, FIG. 3 showing a second embodiment of the present invention will be explained.

The second embodiment shown in FIG. 3 differs from the first embodiment shown in FIG.
Since a high temperature reformer 40 containing a reforming catalyst is provided between the reformer 6 and the heat exchanger 12 provided at the inlet of the heat exchanger, the other components are the same except for the above, so only the differences will be described.

According to the second embodiment, the reformer 6 decomposes the mixed gas of natural gas and steam into hydrogen, carbon monoxide, and carbon dioxide through a reforming reaction. Since the temperature can be raised to the limit of use of the reforming catalyst (approximately 900°C), the reforming reaction can be further advanced to reduce the amount of residual methane in the fuel supplied from the carbon dioxide absorption device 5 to the combustor 2. This makes it possible to achieve a state in which almost no carbon dioxide is emitted in the exhaust gas discharged from the turbine 3. In addition, the above second
In the embodiment, a case is shown in which the high temperature reformer 40 is installed around the combustor 2, but the present invention is not limited thereto. is also possible.

Next, FIG. 4 showing a third embodiment of the present invention will be described.

In the third embodiment shown in FIG. 4, the present invention is applied to a power plant using coal as fuel, and the turbine 3, the steam turbine 9, and the exhaust heat in the first embodiment shown in FIG. The recovery boiler 14 is the same.

As shown in FIG. 4, the coal gasifier 41 uses oxygen supplied from an oxygen plant 42 through an oxygen introduction pipe 46,
Coal is gasified using coal supplied through the coal introduction pipe 45 and steam supplied from the steam turbine 9, and then supplied to the heat recovery boiler 43.

In this case, the gasified fuel is generally a mixed gas of hydrogen, carbon dioxide, etc. whose main component is -carbon oxide.

Air can also be used as an oxidizing agent, but this has the disadvantage that nitrogen is mixed into the fuel, which reduces the concentration of carbon dioxide and increases the size of the carbon dioxide separation process. In the third embodiment, the above-mentioned drawbacks are solved and a more effective oxygen oxidation coal gasification furnace is used. The high temperature gasification gas formed in the coal gasifier 41 is supplied to a heat recovery boiler 43.

The heat recovery boiler 43 converts high-pressure water supplied from the condenser 10 into a mixer 44 using gasified gas from the coal gasifier 41.
The steam is heated together with steam from the steam turbine to steam, the steam is supplied to the steam turbine 9 and the steam turbine 9 is parked, and then supplied to the condenser 10, and the used gasified gas is supplied to the mixer 44. be done. The mixer 44 injects high-pressure water supply from the condenser 10 into the gasified gas from the heat recovery boiler 43 to lower the temperature of the gasified gas to about 200 to 3000°C and convert it into fuel gas. Provide the necessary amount of water vapor for the shift reaction. The shift converter 7 uses water vapor from the heat exchanger 48 to
A shift reaction is caused in the fuel gas from No. 4 to convert carbon monoxide in the fuel gas into hydrogen and carbon dioxide. For example, if the composition of the coalized gasified fuel generated in the oxygen-oxidized coal gasifier 41 is 36% hydrogen, 51% carbon oxide, and 13% carbon dioxide (volume ratio), the rate of reduction in carbon dioxide emissions is As shown in FIG. 5, as the mixing ratio of water vapor increases, the rate of decrease in carbon dioxide decreases. The fuel gas from the shift converter 7 is supplied to the heat exchanger 48, and the steam is supplied to the heat recovery boiler 43 and heated.

The heat exchanger 48 exchanges heat with the high-pressure water supply from the condenser 10 to further lower the temperature of the fuel gas from the shift converter 7 and supplies it to the carbon dioxide absorption device 5, which increases the temperature by heat exchange. The vaporized water vapor is supplied to the shift converter 7. The carbon dioxide absorption device 5 exchanges heat with the regenerated liquid from the regenerator 15 through a heat exchanger 16 through a pipe 24 to raise the temperature of the absorbent liquid obtained by absorbing and separating carbon dioxide from the fuel gas, and then supplies it to the regenerator 15. Then, the regenerated liquid, which has become low temperature through heat exchange, enters the carbon dioxide absorption device 5. The regenerator 15 supplies the carbon dioxide separated from the carbon dioxide absorption liquid to the oxygen plant 42 through the pipe line 27, and converts it into dry ice using the cold heat in the oxygen plant 42, such as the latent heat of oxygen vapor, and leaves the system. The carbon dioxide absorption liquid is discharged through a pipe 47 to the heat exchanger 16 through a pipe 25.

Therefore, even in a power plant that uses coal as fuel, the amount of carbon dioxide contained in the fuel that drives the turbine 3 can be reduced, and the amount of carbon dioxide emitted in the exhaust gas can be reduced.

Next, a fourth embodiment of the present invention will be explained with reference to FIG. 6.

As shown in FIG. 6, the shift converter 7 uses the steam from the exhaust heat recovery boiler 14 to cause a shift reaction between carbon monoxide contained in the low-temperature fuel from the heat exchanger 12 and residual steam, resulting in a concentration of carbon dioxide. The increased fuel gas is transferred to the heat exchanger 50
supply to. The heat exchanger 50 is connected to the shift converter 7.
The fuel gas from the condenser 10 is heat exchanged with a mixture of water supplied from the condenser 10 and steam from the heat exchanger 17 to lower its temperature, and then supplied into the carbon dioxide separator 51 . The carbon dioxide separation device 51 dries carbon dioxide contained in the fuel from the heat exchanger 50 using the latent heat of vapor of liquefied natural gas, which is the fuel supplied from the fuel supply device 4 through the pipe 20. It is iced and discharged outside the plant through line 28, hydrogen other than carbon dioxide - carbon oxide.

Residual methane and the like are supplied to the combustor 2 through a pipe 52. Further, the carbon dioxide separator 51 is connected to the heat exchanger 50.
The natural gas vaporized by heat exchange with the fuel from the heat exchanger 1
7, the natural gas is reformed by the same method as in the embodiment shown in FIG. 1, and sent to the shift converter 7, and the above operations are repeated. Since the configuration other than the above is the same as that shown in FIG. 1, the explanation will be omitted.

Therefore, this fourth embodiment can be applied to other power plants that use liquefied natural gas as fuel, and by utilizing the latent heat of the liquefied natural gas, it can be used without installing a special carbon dioxide separation device. , carbon dioxide can be separated from fuel.

Note that, as in the fourth embodiment, methods to replace the carbon dioxide separation device by carbon dioxide absorption in the first to third embodiments are not limited to these, and include, for example, a hydrogen storage alloy, a membrane separation device, etc. It is also possible to install a hydrogen separation device such as the above between the fuel supply device and the combustor of the gas turbine and separate carbon dioxide from the fuel gas from which hydrogen has been separated by the hydrogen separation device. For example, hydrogen, which is effective as a fuel, can be separated and stored, thereby increasing the operating efficiency of the plant as a power plant.

Next, a fifth embodiment of the present invention is applied to a plant including an oxygen plant equipped with an oxygen-oxidized coal gasifier. In this case, when fuel gas with increased carbon dioxide concentration is supplied into the oxygen plant by heat exchange with steam in a shift converter and a shift reaction between carbon oxide and residual steam, the carbon dioxide in the fuel gas increases. Carbon is turned into dry ice by the latent heat of oxygen vapor in the oxygen plant and released outside the system, and hydrogen other than carbon dioxide and carbon oxide are supplied to the combustor.

Therefore, even in a power plant that uses coal as fuel, carbon dioxide can be separated without using a special carbon dioxide separation device. Note that this embodiment is not illustrated. This is because it has been determined that the configuration of this embodiment is the same as the configurations up to the fourth embodiment, and the above configuration can be understood even if it is not illustrated.

Next, FIG. 7 showing a sixth embodiment of the present invention will be described.

As shown in FIG. 7, in the sixth embodiment, the carbon dioxide absorption device 5 is connected to a fuel supply device (not shown) through a pipe 58 and to a combustor (not shown) through a pipe 59. ing. Further, the carbon dioxide absorption device 5 is connected to a heat exchanger 16 and a power recovery turbine 55, which are installed between the regenerator 15 and a pipe 25. Further, the carbon dioxide absorption device 5 is connected to the heat exchanger 16 and the pump 56, and to the piping 24. The power recovery turbine 55 includes the pump 56 and the motor generator 57.
is connected to.

In the general alkanolamine method for absorbing and separating carbon dioxide, an absorption liquid is circulated between an absorption device and a regenerator. - For boat fishing, it is desirable for the absorption process to be at high pressure and low temperature, and for the regeneration process to be at low pressure and high temperature.

Therefore, in the sixth embodiment, the carbon dioxide absorption device 5
is a high pressure (15 to 30
When the gas turbine fuel (ata) is supplied through the pipe 58, it comes into contact with the absorption liquid supplied in advance to absorb carbon dioxide in the fuel, and then the fuel from which carbon dioxide has been removed is passed through the pipe 59 and combusted. The absorption liquid that has absorbed carbon dioxide is supplied to the heat exchanger 16 through the piping 25. The heat exchanger 16 exchanges heat with the absorption liquid that has absorbed carbon dioxide from the carbon dioxide absorption device 5 and the regeneration liquid from which carbon dioxide has been removed from the regenerator 15, raises the temperature, and supplies it to the power recovery turbine 55. . The regenerated liquid, which has become low temperature through heat exchange, is supplied to the pump 56. The power recovery turbine 55
is opened and operated by the high-pressure absorption liquid from the heat exchanger 16, and supplies the low-pressure absorption liquid to the regenerator 15.

Since the internal pressure of the regenerator 5 is low,
The absorption liquid expands to separate carbon dioxide and take it out from the pipe 60, and the regeneration liquid from which carbon dioxide has been separated is supplied to the heat exchanger 16, where it exchanges heat with the absorption liquid from the carbon dioxide absorption device 5. After cooling down to a low temperature, it is supplied to the pump 56.

The pump 56 is driven by a motor generator 57, and pressurizes the regenerated liquid from the heat exchanger 16, from which low-temperature and low-pressure carbon dioxide has been removed, and passes it through the pipe line 24 to the carbon dioxide absorption device 5.
to the combustor. Note that the motor generator 5
7 becomes a motor or a generator depending on the operating conditions of the power recovery turbine 55 and the pump 56.

Therefore, according to the sixth embodiment, the pressure energy of carbon dioxide released outside the plant system is transferred to the power recovery turbine 5.
5 of the power can be recovered, thereby reducing power consumption.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

(1) In a power plant that includes a gas turbine, carbon dioxide emitted from the gas turbine is separated, so
Carbon dioxide emissions can be reduced.

(2) Since fuel containing reduced carbon dioxide is supplied to the combustor by the carbon dioxide absorption device provided between the fuel supply device and the combustor, carbon dioxide emissions can be reduced.

(3) A hydrogen separator is installed between the fuel supply device and the combustor, and the hydrogen separator separates carbon dioxide and hydrogen, making it possible to separate carbon dioxide without using a special carbon dioxide separator. In addition, the load request to the plant for increasing the gas turbine and the fuel processing operation for increasing the carbon dioxide concentration contained in the fuel can be separated, thereby increasing the operational efficiency of the power plant.

(4) Since the vapor latent heat of the fuel from the fuel supply device is used to fix the carbon dioxide contained in the fuel and discharge it outside the system, there is no need to install a special device to remove the carbon dioxide content. Carbon dioxide can be separated.

(5) When the above fuel is oxygenated coal gasification gas, the carbon dioxide contained in the fuel is fixed by the cold heat of the oxygen plant that supplies the oxygenated coal gasifier and is discharged outside the system. Carbon dioxide can also be separated in power plants that use carbon dioxide as fuel without installing a special carbon dioxide separation device.

(6) Even when the fuel is liquefied natural gas, carbon dioxide can be separated by the same method as in (5) above.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the first embodiment of the present invention when liquefied natural gas is used as fuel, FIG. 2 is an outlet temperature curve diagram of the shift converter shown in FIG. 1, and FIG. An explanatory diagram showing a second embodiment of the present invention in which a high-temperature reformer is attached to the figure, and a fourth embodiment.
The figure is an explanatory diagram showing the third embodiment of the present invention when coal is used as fuel, and FIG. 5 shows the mixing ratio of water vapor in fuel gas and the reduction rate of carbon dioxide in the third embodiment shown in FIG. FIG. 6 is an explanatory diagram showing a fourth embodiment of the present invention in which carbon dioxide is separated using fuel from a fuel supply device instead of a carbon dioxide separator, and FIG. It is an explanatory view showing a 6th example when coal is used. 2... Combustor, 4... Fuel supply device, 5... Carbon dioxide absorption device, 6... Reformer, 7... Shift converter, 11... Mixer, 15... Regenerator, 40・
...High temperature reformer, 41...Coal gasifier, 42...
Oxygen plant, 51... Carbon dioxide separation device, 55.
...Power recovery turbine, 56...Pump, 57...
motor generator.

Claims (1)

[Scope of Claims] 1. In a power plant including a gas turbine consisting of an air compressor, a combustor, and a turbine, the power plant is disposed between a fuel supply device and the combustor, and is contained in the fuel from the fuel supply device. A power plant equipped with a carbon dioxide separator that separates carbon dioxide and discharges it outside the plant system. 2. The carbon dioxide separator according to claim 1 is a power plant having a carbon dioxide separator configured to absorb and separate carbon dioxide contained in fuel using an absorption liquid. 3. The carbon dioxide separation device according to claim 2 is connected to a shift reaction device that causes carbon monoxide contained in the fuel from the fuel supply device and steam to undergo a shift reaction using a shift reaction catalyst to increase the concentration of carbon dioxide. Power plant with carbon dioxide separator. 4. The carbon dioxide separator according to claim 1, 2 or 3 is a carbon dioxide separator equipped with a device for fixing carbon dioxide separated by the carbon dioxide separator by heat exchange with fuel from a fuel supply device. Power plant with equipment. 5. In a power plant including a gas turbine consisting of an air compressor, a combustor, and a turbine, it is arranged between a fuel supply device and a steam combustor, and separates hydrogen contained in the fuel from the fuel supply device, and A power plant having a carbon dioxide separation device that fixes carbon dioxide by heat-exchanging fuel containing carbon dioxide from which hydrogen has been separated with fuel from the fuel supply device. 6. In a power plant including a gas turbine consisting of an air compressor, a combustor, and a turbine, the carbon dioxide contained in the fuel from the fuel supply device is removed using an absorption liquid, which is disposed between the fuel supply device and the combustor. a carbon dioxide absorption device that absorbs and separates carbon dioxide; a regenerator that separates carbon dioxide from an absorption liquid that has absorbed carbon dioxide in the carbon dioxide absorption device;
disposed between the regenerator and the carbon dioxide absorption device,
A power plant comprising a carbon dioxide separator and a power recovery turbine powered by absorption liquid from the carbon dioxide absorber.