JP2001207861A - Power generation method and apparatus using hydrate slurry fuel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently use hydrate slurry fuel. SOLUTION: This device is provided with a slurry pump 2 for pressurizing the hydrate slurry fuel by adding a combustible slurry medium to a hydrate, a compressor 5 for pressurizing combustion air, a combustor 3 for burning a mixture by mixing the hydrate slurry fuel with the combustion air, a gas turbine 7 for generating electric power by being driven by mixed gas of combustion gas and steam generated by the combustor 3, an exhaust heat boiler 10 for turning water of the other line into steam by the mixed gas and a steam turbine 13 for generating electric power by being driven by the steam generated by the exhaust heat boiler 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for power generation using hydrate slurry fuel.

[0002]

2. Description of the Related Art In recent years, it has been considered to treat natural gas or the like used for commercial and industrial fuels in a sherbet-like hydrate in order to make it easy to handle.

Hydrates are solid compounds in which hydrocarbons such as methane, ethane, propane, and butane, which are components of natural gas, are confined in a cage structure formed by weakly binding water molecules. When manufacturing
A hydrate is generated by blowing gas such as methane at 30 to 50 atm into water at 0 to 5 ° C. and cooling to remove heat of hydrate formation.

However, since hydrate is a fuel containing water, the calorific value is low, and there is a problem that hydrate cannot be used as fuel as it is.

Accordingly, a hydrate slurry is prepared by adding a flammable liquid slurry medium such as ethers, crude oil distillation components, crude oil, hydrocarbons having 3 or more carbon atoms, ketones, etc. to the hydrate to increase the calorific value. It is considered to be used.

[0006]

However, when power is generated using hydrated slurry fuel, heat is applied to the hydrate to separate it into hydrocarbon gas such as natural gas and water, and to generate carbonized water. Since hydrogen gas is used for power generation and water is used for hydrate production, there is a problem that the efficiency is low and the method is not practical.

An object of the present invention is to provide a method and an apparatus for generating electricity by using hydrate slurry fuel so that the hydrate slurry fuel can be used efficiently.

[0008]

According to the first aspect of the present invention, a hydrate slurry obtained by adding a flammable slurry medium to a hydrate is pressurized, and the hydrate slurry fuel is compressed into combustion air. Power is generated through a gas turbine using a mixed gas of combustion gas and water vapor generated by mixing and burning, and is further generated through a steam turbine using water vapor generated by the mixed gas discharged from the gas turbine. And a power generation method using hydrate slurry fuel.

According to a second aspect of the present invention, a hydrate slurry in which a flammable slurry medium is added to a hydrate is pressurized, the hydrate slurry is separated into a gaseous fuel, a liquid fuel, and water. The present invention relates to a power generation method using a hydrate slurry fuel, wherein power is generated through a gas turbine using a mixed gas of combustion gas and steam generated by mixing and burning with pressurized combustion air.

According to a third aspect of the present invention, preferably, at least a portion of water generated when the hydrate slurry fuel is decomposed is evaporated from the mixed gas, and then the other separated water is removed. You may mix and burn with a hydrate slurry fuel.

According to a fourth aspect of the present invention, a hydrate slurry fuel in which a flammable slurry medium is added to a hydrate is pressurized, and the hydrate slurry fuel is separated into a gas fuel, a liquid fuel, and water. Electric power is generated through a gas turbine using a mixed gas of combustion gas and steam generated by mixing and burning with pressurized combustion air, and steam is generated using steam generated by the mixed gas discharged from the gas turbine. A power generation method using hydrate slurry fuel characterized by generating power via a turbine.

According to a fifth aspect of the present invention, preferably, a part of water generated when the hydrate slurry fuel is decomposed is introduced into another line provided with a steam turbine. Good.

According to a sixth aspect of the present invention, preferably, a part of the steam in another line provided with the steam turbine is mixed with the separated hydrate slurry fuel for combustion. May be.

According to the seventh aspect, the first, second, third,
In the invention described in 4, 5, or 6, preferably, at least one of heat generated when pressurizing the combustion air or air heat before pressurization may be absorbed by cold heat of the hydrate slurry fuel.

The invention according to claim 8 provides a slurry pump for pressurizing a hydrate slurry fuel obtained by adding a flammable slurry medium to a hydrate, a compressor for pressurizing combustion air, and a method for compressing the hydrate slurry fuel. A combustor that mixes and burns with combustion air, a gas turbine that generates power by being driven by a mixed gas of combustion gas and steam generated in the combustor,
A power generator using hydrate slurry fuel, comprising: an exhaust heat boiler that turns water in another line into steam with the mixed gas; and a steam turbine that generates electric power by being driven by the steam generated by the exhaust heat boiler. , According to.

According to a ninth aspect of the present invention, there is provided a slurry pump for pressurizing a hydrate slurry fuel in which a flammable slurry medium is added to a hydrate, a compressor for pressurizing combustion air, and a method for compressing the hydrate slurry fuel. A separator for separating gaseous fuel, liquid fuel and water, a combustor for mixing gaseous fuel, liquid fuel and water with pressurized combustion air for combustion, and a combustion gas and steam generated in the combustor And a power generator using hydrate slurry fuel, comprising: a gas turbine that generates power by being driven by a mixed gas.

According to a tenth aspect of the present invention, preferably, at least a portion of the water of the hydrate slurry fuel separated by the separator is converted into steam by the mixed gas and returned to the combustor. A heat boiler may be provided.

The invention according to claim 11 provides a slurry pump for pressurizing a hydrate slurry fuel in which a flammable slurry medium is added to a hydrate, a compressor for pressurizing combustion air, and a method for compressing the hydrate slurry fuel. A separator for separating gaseous fuel, liquid fuel and water, a combustor for mixing gaseous fuel, liquid fuel and water with pressurized combustion air and burning, a combustion gas and steam generated in the combustor; A gas turbine that generates electric power by being driven by the mixed gas, and a waste heat boiler that turns water in another line into steam with the mixed gas,
And a steam turbine driven by steam generated in the waste heat boiler to generate power.

According to a twelfth aspect of the present invention, preferably, a part of the water of the hydrate slurry fuel separated by the separator is introduced into another line equipped with a steam turbine. , A line connecting the separator to another line.

As set forth in claim 13, claim 11 or 12
In the invention described in the above, preferably, a line connecting the other line and the combustor may be provided so that a part of the water converted into steam by the exhaust heat boiler is returned to the combustor in the other line including the steam turbine. Good.

As set forth in claim 14, claims 8, 9, 1
In the invention described in 0, 11, 12 or 13, preferably, the compressor is configured to absorb at least one of heat generated when pressurizing the combustion air or air heat before pressurization by the cold heat of the hydrate slurry fuel. A hydrate slurry fuel line may be connected.

Therefore, according to the power generation method using hydrate slurry fuel and the apparatus therefor according to the first to fourteenth aspects of the present invention, when burning the hydrate slurry fuel, not only the combustion gas, Water vapor is also generated and greatly expanded, so that the gas turbine can be driven sufficiently to generate power efficiently. It should be noted that in the combustion using only hydrate, the gas turbine cannot be sufficiently driven due to the low heat generation amount.

Further, since the fuel is directly burned without removing water from the hydrate slurry fuel, the processing steps can be simplified,
As a result, the production cost and power generation cost of the plant can be reduced. Further, since the decomposition of the hydrate slurry fuel and the heat plant are the same, the combustion exhaust heat can be effectively used. Furthermore, since the hydrate compound water can be easily converted into high-pressure, high-temperature steam, the amount of excess air sent to the gas turbine can be reduced by that amount, and as a result, the air compression power can be reduced and NOx generation can be reduced. The amount can also be reduced.

According to the power generation method and apparatus using hydrate slurry fuel according to claims 1, 4, 8, and 11, combined power generation is performed by power generation by driving a gas turbine and power generation by driving a steam turbine. Can be generated.

According to the power generation method and apparatus using the hydrate slurry fuel according to the second, fourth, ninth and eleventh aspects, the hydrate slurry fuel is separated into gas fuel, liquid fuel and water, so that the gas fuel to be burned and By adjusting the amounts of the liquid fuel and water, the gas turbine can be appropriately driven to efficiently generate power.

According to a third aspect of the present invention, in the power generation method using the hydrate slurry fuel, at least a portion of water generated when the hydrate slurry fuel is decomposed is evaporated from the mixed gas and then separated. And mixed with the hydrate slurry fuel and burned.
In the power generation method using the hydrate slurry fuel according to claim 4 or 5, a part of the steam in another line provided with the steam turbine is mixed with the separated hydrate slurry fuel and burned. As described above, the power generator using hydrate slurry fuel according to claim 9, further comprising: a waste heat boiler for returning at least a part of the water of the hydrate slurry fuel separated by the separator to steam by a mixed gas and returning the steam to the combustor, According to a thirteenth aspect of the present invention, in the power generator using hydrate slurry fuel according to the eleventh or twelfth aspect, a part of the water converted into steam by the exhaust heat boiler is returned to the combustor in another line including the steam turbine. , Each of which has a line connecting the other line to the combustor. The water at the inner so reduces that the steam makes it easy to burn such a hydrate slurry fuel, power generation can be more efficiently.

According to a fifth aspect of the present invention, in the power generation method using the hydrate slurry fuel according to the fourth aspect, a part of water generated when the hydrate slurry fuel is decomposed is introduced into another line provided with a steam turbine, According to a twelfth aspect of the present invention, in the power generator using hydrate slurry fuel according to the eleventh aspect, a part of the water of the hydrate slurry fuel separated by the separator is introduced into another line provided with a steam turbine. If a line for connecting the separator to another line is provided, the water of the hydrate slurry separated by the separator is appropriately introduced into another line equipped with a steam turbine to reduce the amount of water in the other line. It can be adjusted and power generation by the steam turbine can be performed efficiently.

Claims 1, 2, 3, 4, 5 as in claim 7
Alternatively, in the power generation method using the hydrate slurry fuel, at least one of heat generated when pressurizing the combustion air and air heat before pressurization is absorbed by cold heat of the hydrate slurry fuel. 8, 9, 10,
In the power generator using the hydrate slurry fuel of 11, 12, or 13, the compressor is hydrated so as to absorb at least one of heat generated when pressurizing the combustion air or air heat before pressurization by the cold heat of the hydrate slurry fuel. Connecting the rate slurry fuel line improves the air compression efficiency and heats the hydrate slurry fuel by at least one of the heat generated in pressurizing the combustion air or the air heat before pressurization. Combustion and the like are facilitated, and power can be generated more efficiently.

[0029]

Embodiments of the present invention will be described below with reference to the drawings.

A power generation method using hydrate slurry fuel and an apparatus therefor according to the embodiment of the present invention will be described from the first example to the fourth example.

FIG. 1 is a flow sheet of a power generation method using hydrate slurry fuel and a device thereof according to a first embodiment of the present invention.

A supply line 1 to which hydrate slurry fuel is supplied is connected to a combustor 3 via a slurry pump 2, and a supply line 4 to which combustion air is supplied is connected via a compressor 5 to the combustor 3. 3 is connected.

The combustor 3 is connected to a gas turbine 7 for power generation through a downstream combustion line 6, and a discharge line 8 is provided downstream of the gas turbine 7 in a circulation line 9 of another line. The exhaust line 8 is connected to a chimney 12 via an exhaust line 11 on the downstream side of the exhaust heat boiler 10.

On the other hand, a steam turbine 13 for power generation is connected to another circulation line 9 provided with the waste heat boiler 10, and a condenser 14 for returning steam to water is provided downstream of the steam turbine 13. , And return to the previous exhaust heat boiler 10.

The operation of the first embodiment of the present invention will be described below.

The hydrate slurry fuel is produced by adding a flammable liquid slurry medium to the hydrate. When using the hydrate slurry fuel, the hydrate slurry fuel supplied from the supply line 1 is supplied to the slurry pump. 2
And pressurized to a predetermined high pressure and introduced into the combustor 3. On the other hand, the combustion air supplied from the supply line 4 is simultaneously supplied to the compressor 5
At a predetermined high pressure and introduced into the combustor 3.

The hydrate slurry fuel and combustion air introduced into the combustor 3 are burned under pressure while being mixed in the combustor 3 to produce a mixed gas of combustion gas and steam.

The mixed gas is sent from the combustor 3 to the gas turbine 7 via the combustion line 6 to drive the gas turbine 7 to generate electricity, and then from the downstream exhaust line 8 to the exhaust heat boiler 10 in the circulation line 9. Is finally discharged to the outside air from the chimney 12 via the discharge line 11.

On the other hand, in the exhaust heat boiler 10 in the circulation line 9, water is heated by the high-temperature mixed gas into steam, and the steam is sent to the steam turbine 13 to drive the steam turbine 13 to generate electric power. Condenser 14
Is returned to the water and sent to the exhaust heat boiler 10 so as to circulate.

As described above, according to the power generation method and apparatus using the hydrate slurry fuel of the first example, when burning the hydrate slurry fuel, not only the combustion gas but also the water vapor is generated. Since the gas turbine 7 expands significantly, the gas turbine 7 can be driven sufficiently to generate power efficiently. It should be noted that in the combustion using only hydrate, the gas turbine 7 cannot be driven sufficiently due to the low heat generation amount.

Since the fuel is directly combusted without removing water from the hydrate slurry fuel, the processing steps can be simplified, and as a result, the production cost and power generation cost of the plant can be reduced. Further, since the decomposition of the hydrate slurry fuel and the heat plant are the same, the combustion exhaust heat can be effectively used. Furthermore, since the hydrate compound water can be easily converted into high-pressure, high-temperature steam, the amount of excess air sent to the gas turbine can be reduced by that amount, and as a result, the air compression power can be reduced and NOx generation can be reduced. The amount can also be reduced.

Further, combined power generation can be performed by power generation by driving the gas turbine 7 and power generation by driving the steam turbine 13 to generate a large amount of power.

FIG. 2 is a flow sheet of a power generation method using hydrate slurry fuel and a device therefor according to a second embodiment of the present invention, in which a supply line for hydrate slurry fuel is modified. ing. Further, the portions denoted by the same reference numerals as those in FIG. 1 represent the same items.

A supply line 15 for supplying hydrate slurry fuel is connected to the combustor 3 via a slurry pump 2, and a supply line 4 for supplying combustion air is connected to the combustor via a compressor 16. 3 is connected. Further, an intermediate portion of the supply line 15 between the slurry pump 2 and the combustor 3 is in contact with a refrigerant side of a compressor 16 for compressing combustion air.

Hereinafter, the configuration after the combustor 3 is substantially the same as the power generation method using the hydrate slurry fuel of the first example and its apparatus.

The operation of the second embodiment of the present invention will be described.

When hydrate slurry fuel is used, the hydrate slurry fuel supplied from the supply line 15 is pressurized to a predetermined high pressure by the slurry pump 2 and the compressor 1
6 to the combustor 3 via the refrigerant side. On the other hand, the combustion air supplied from the supply line 4 is pressurized to a predetermined high pressure by the compressor 16 and introduced into the combustor 3.

Hereinafter, after the process in the combustor 3, the process proceeds substantially the same as the hydrate slurry fuel generating method and the device of the first example.

As described above, in the power generation method using the hydrate slurry fuel of the second example, at least one of the heat generated when pressurizing the combustion air or the air heat before pressurization is absorbed by the cold heat of the hydrate slurry fuel. In the power generator using hydrate slurry fuel of the second example,
When the hydrate slurry fuel supply line 15 is connected to the compressor 16 so that at least one of the heat generated when pressurizing the combustion air or the air heat before pressurization is absorbed by the cold heat of the hydrate slurry fuel, the air compression efficiency is improved. The hydrate slurry fuel is heated by at least one of the heat generated in pressurizing the combustion air and the air heat before pressurization, so that the combustion of the hydrate slurry fuel becomes easy and the power is generated more efficiently. be able to.

Further, the power generation method using hydrate slurry fuel of the second example and the apparatus therefor have the same functions and effects as the first example.

FIG. 3 is a flow sheet of a third embodiment of a hydrate slurry fuel generating method and apparatus for practicing the present invention, which includes a step of separating the hydrate slurry fuel. I have.

A supply line 20 to which hydrate slurry fuel is supplied is connected to a gas-liquid separator 22 of a separator via a slurry pump 21, and a supply line 23 to which combustion air is supplied is connected to a compressor 24. It is connected to the combustor 25 via. Further, an intermediate portion of the supply line 20 between the slurry pump 21 and the gas-liquid separator 22 is in contact with a refrigerant side of a compressor 24 for compressing combustion air.

The gas-liquid separator 22 has a supply line 26 for gas fuel, a supply line 27 for liquid fuel, and a supply line 28 for water on the downstream side. The supply line 26 for gas fuel and the supply line 26 for liquid fuel Supply line 27 is connected to the combustor 25. A water supply line 28 is also connected to the combustor 25 via a flow path regulator 29.

The combustor 25 is connected to a gas turbine 31 for power generation via a combustion line 30 on the downstream side, and a discharge line 32 is provided on the downstream side of the gas turbine 31 so as to be in contact with the heat medium side of the exhaust heat boiler 33. Further, the discharge line 32 is connected to a chimney 35 through a discharge line 34 on the downstream side of the heat boiler 33.
It is connected to the.

On the other hand, the exhaust heat boiler 33 has a supply line 36 branched from the flow path regulator 29 of the water supply line 28 on the upstream side, and a return line 37 connected to the combustor 25 on the downstream side. It has.

Hereinafter, the operation of the third example of the embodiment of the present invention will be described.

When the hydrate slurry fuel is used, the hydrate slurry fuel supplied from the supply line 20 is pressurized to a predetermined high pressure by a slurry pump 21, and is supplied to a gas-liquid separator via a refrigerant side of a compressor 24. 22. On the other hand, the combustion air supplied from the supply line 23 is pressurized to a predetermined high pressure by the compressor 24 and introduced into the combustor 25.

The pressurized hydrate slurry fuel is separated by the gas-liquid separator 22 into gaseous fuel such as methane, liquid fuel of high molecular weight hydrocarbons, and water, and the gaseous fuel is supplied to the gas fuel supply line 26. The liquid fuel is introduced into the combustor 25 via a supply line 27 for the liquid fuel, respectively.
The water is supplied to the supply line 28 for the water introduced into the combustor 25 and the supply line 3 to the exhaust heat boiler 10 by the flow path adjuster 29.
6 and / or one of them.

The gaseous fuel, the liquid fuel and the water are burned under pressure while being mixed in the combustor 25 to produce a mixed gas of the combustion gas and the steam.

Here, the combustion state of the combustor 25 is observed at any time, and is appropriately controlled by adjusting the amount of water by the flow path regulator 29. Specifically, when the combustion state is reduced, the flow path adjuster 29 is adjusted to flow more water into the supply line 36 to the exhaust heat boiler 33 so that the water to the combustor 25 is reduced, and the combustion state increases. In this case, the flow path adjuster 29 is prepared, and a large amount of water is supplied to the supply line 28 so as to increase the amount of water to the combustor 25.

The mixed gas generated in the combustor 25 is sent to the gas turbine 31 via the combustion line 30 to drive the gas turbine 31 to generate electric power, and then from the downstream exhaust line 32 to generate heat from the exhaust heat boiler 33. After passing through the medium side, it is finally discharged to the outside air from the chimney 35 via the discharge line 34.

On the other hand, in the exhaust heat boiler 33, the flow path adjuster 29
The water sent through the supply line 36 is heated by the high-temperature mixed gas into steam, and the steam is returned to the return line 37.
Is returned to the combustor 25.

As described above, according to the power generation method and the apparatus using the hydrate slurry fuel of the third example, the hydrate slurry fuel is separated into the gas fuel, the liquid fuel, and the water by the gas-liquid separator 22. The amounts of the gas fuel, the liquid fuel, and the water to be burned are adjusted, and the gas turbine 7 is appropriately driven to efficiently generate electric power.

In the power generation method using the hydrate slurry fuel, at least a part of water generated when the hydrate slurry fuel is decomposed is evaporated from the mixed gas, and then mixed with another separated hydrate slurry fuel for combustion. Further, in the power generation apparatus using hydrate slurry fuel, at least a part of the water of the hydrate slurry fuel separated by the gas-liquid separator 22 is converted into steam by a high-temperature mixed gas and returned to the combustor 25. 33, the water is introduced into the combustor 25 as water vapor, thereby reducing the conversion of water into water vapor in the combustor 25. Therefore, the combustion of the hydrate slurry fuel becomes easy, and the power generation is more efficiently performed. can do.

The power generation method and apparatus using the hydrate slurry fuel of the third example are the same as those of the first and second examples except for the operation and effect of not having another circulation line, steam turbine, and the like. It has the same function and effect.

FIG. 4 is a flow sheet of a method and an apparatus for generating electricity using hydrate slurry fuel according to a fourth embodiment of the present invention, which includes a step of separating the hydrate slurry fuel and performs combined power generation. Is shown. or,
Parts denoted by the same reference numerals as those in FIG. 3 represent the same items.

Here, the power generation method and apparatus using the hydrate slurry fuel of the fourth example are as follows. The line from the hydrate slurry fuel supply line 20 to the gas turbine 31 via the gas-liquid separator 22 is the third one. It is almost the same as the example,
The description will be continued.

On the downstream side of the gas turbine 31, a discharge line 32 is in contact with the heat medium side of a waste heat boiler 33 provided in a circulation line 38 of another line, and the discharge line 32 is further downstream of the waste heat boiler 33. It is connected to a chimney 35 via an exhaust line 34 on the side.

On the other hand, a steam turbine 39 for power generation is connected to a circulation line 38 provided with a waste heat boiler 33, and a condenser 40 for returning steam to water is provided downstream of the steam turbine 39. Is returned to the waste heat boiler 33.

A supply line 41 branched from a flow path regulator 29 of a supply line 28 for water is connected to a line 38 a of the circulation line 38 between the condenser 40 and the waste heat boiler 33 so as to supply water appropriately. A line 38 b between the exhaust heat boiler 33 and the steam turbine 39 is provided with a return line 43 via a flow path regulator 42 so that water is appropriately discharged and introduced into the combustor 25. .

The operation of the fourth embodiment of the present invention will be described below.

The process of separating and burning the hydrate slurry fuel is the same process as in the third example, and will be described subsequently.

The mixed gas generated in the combustor 25 is sent to the gas turbine 31 via the combustion line 30 to drive the gas turbine 31 to generate electric power, and then to generate heat from the exhaust heat boiler 33 from the downstream exhaust line 32. After passing through the medium side, it is finally discharged from the chimney 35 to the outside air via the discharge line 34.

On the other hand, in the exhaust heat boiler 33 in the circulation line 38, the water is heated by the high-temperature mixed gas into steam, and the steam is sent to the steam turbine 39 to drive the steam turbine 39 to generate electric power. Condenser 4
The waste heat boiler 33 to return to water and circulate by 0
Sent to

Here, the amount of water in the circulation line 38 is adjusted by adjusting the water sent from the supply line 41 via the flow path regulator 29, and the combustion state of the combustor 25 is It is controlled by adjusting the steam sent through the flow path regulator 42 and the water sent directly from the flow path regulator 29, respectively.

As described above, according to the power generation method using the hydrate slurry fuel of the fourth example and the apparatus therefor, combined power generation is performed by the power generation driven by the gas turbine 31 and the power generation driven by the steam turbine 39. Electric power can be generated.

In the power generation method using the hydrate slurry fuel, a part of the water generated when the hydrate slurry fuel is decomposed is transferred to the circulation line 3 provided with the steam turbine 39.
8, and in a power generator using hydrate slurry fuel, a part of the water of the hydrate slurry fuel separated by the gas-liquid separator 22 is introduced into a circulation line 38 provided with a steam turbine 39. Gas-liquid separator 22
And a supply line 41 for connecting the hydrated slurry fuel separated by the gas-liquid separator 22 to the circulation line 38 provided with the steam turbine 39. The amount of water can be adjusted, and power generation by the steam turbine 39 can be performed efficiently.

Further, in the power generation method using the hydrate slurry fuel, a part of the steam in the circulation line 38 provided with the steam turbine 39 is mixed with the separated hydrate slurry fuel and burned. In the power generator according to the present invention, a part of the water converted into steam by the exhaust heat boiler 33 is returned to the combustor 25 in the circulation line 38 including the steam turbine 39.
Return line 43 connecting circulation line 38 and combustor 25
When water is introduced into the combustor 25 as water vapor, the conversion of water into water vapor in the combustor 25 is reduced, so that combustion of the hydrate slurry fuel or the like is facilitated, and power is generated more efficiently. be able to.

Further, the power generation method and apparatus using the hydrate slurry fuel of the fourth example have the same operation and effects as the first to third examples.

The power generation method using hydrate slurry fuel and the apparatus therefor according to the present invention are not limited to the above-described embodiment, and may include different power generation steps in addition to the gas turbine and the steam turbine. Of course, various changes can be made without departing from the spirit of the present invention.

[0081]

According to the power generation method and apparatus using the hydrate slurry fuel according to the first to fourteenth aspects of the present invention, when the hydrate slurry fuel is burned,
Not only combustion gas but also water vapor is generated and greatly expanded, so that the gas turbine can be driven sufficiently to efficiently generate power. It should be noted that in the combustion using only hydrate, the gas turbine cannot be sufficiently driven due to the low heat generation amount.

Further, since the fuel is directly combusted without removing water from the hydrate slurry fuel, the treatment process can be simplified,
As a result, the production cost and power generation cost of the plant can be reduced. Further, since the decomposition of the hydrate slurry fuel and the heat plant are the same, the combustion exhaust heat can be effectively used. Furthermore, since the hydrate compound water can be easily converted into high-pressure, high-temperature steam, the amount of excess air sent to the gas turbine can be reduced by that amount, and as a result, the air compression power can be reduced and NOx generation can be reduced. The amount can also be reduced.

According to the power generation method and apparatus using the hydrate slurry fuel according to the first, fourth, eighth and eleventh aspects, combined power generation is performed by power generation by driving the gas turbine and power generation by driving the steam turbine. Can be generated.

According to the power generation method and apparatus using the hydrate slurry fuel of the second, fourth, ninth and eleventh aspects, the hydrate slurry fuel is separated into a gas fuel, a liquid fuel and water, so that the gas fuel to be burned and By adjusting the amounts of the liquid fuel and water, the gas turbine can be appropriately driven to efficiently generate power.

According to a third aspect of the present invention, in the power generation method using the hydrate slurry fuel, at least a portion of water generated when the hydrate slurry fuel is decomposed is evaporated from the mixed gas and then separated. And mixed with the hydrate slurry fuel and burned.
In the power generation method using the hydrate slurry fuel according to claim 4 or 5, a part of the steam in another line provided with the steam turbine is mixed with the separated hydrate slurry fuel and burned. As described above, the power generator using hydrate slurry fuel according to claim 9, further comprising: a waste heat boiler for returning at least a part of the water of the hydrate slurry fuel separated by the separator to steam by a mixed gas and returning the steam to the combustor, According to a thirteenth aspect of the present invention, in the power generator using hydrate slurry fuel according to the eleventh or twelfth aspect, a part of the water converted into steam by the exhaust heat boiler is returned to the combustor in another line including the steam turbine. , Each of which has a line connecting the other line to the combustor. The water at the inner so reduces that the steam makes it easy to burn such a hydrate slurry fuel, power generation can be more efficiently.

According to a fifth aspect of the present invention, in the power generation method using the hydrate slurry fuel according to the fourth aspect, a part of water generated when the hydrate slurry fuel is decomposed is introduced into another line having a steam turbine. According to a twelfth aspect of the present invention, in the power generator using hydrate slurry fuel according to the eleventh aspect, a part of the water of the hydrate slurry fuel separated by the separator is introduced into another line provided with a steam turbine. If a line for connecting the separator to another line is provided, the water of the hydrate slurry separated by the separator is appropriately introduced into another line equipped with a steam turbine to reduce the amount of water in the other line. It can be adjusted and power generation by the steam turbine can be performed efficiently.

As defined in claim 7, claims 1, 2, 3, 4, 5
Alternatively, in the power generation method using the hydrate slurry fuel, at least one of heat generated when pressurizing the combustion air and air heat before pressurization is absorbed by cold heat of the hydrate slurry fuel. 8, 9, 10,
In the power generator using the hydrate slurry fuel of 11, 12, or 13, the compressor is hydrated so as to absorb at least one of heat generated when pressurizing the combustion air or air heat before pressurization by the cold heat of the hydrate slurry fuel. Connecting the rate slurry fuel line improves the air compression efficiency and heats the hydrate slurry fuel by at least one of the heat generated in pressurizing the combustion air or the air heat before pressurization. Combustion and the like are facilitated, and power can be generated more efficiently.

[Brief description of the drawings]

FIG. 1 is a flow sheet of a power generation method using hydrate slurry fuel and a device therefor, showing a first example of an embodiment of the present invention.

FIG. 2 is a flow sheet of a power generation method using hydrate slurry fuel and a device thereof according to a second embodiment of the present invention.

FIG. 3 is a flow sheet of a power generation method using hydrate slurry fuel and a device therefor, showing a third example of an embodiment of the present invention.

FIG. 4 is a flow sheet of a power generation method using hydrate slurry fuel and a device thereof according to a fourth embodiment of the present invention.

[Explanation of symbols]

 2 Slurry Pump 3 Combustor 5 Compressor 7 Gas Turbine 9 Circulation Line (Other Line) 10 Waste Heat Boiler 13 Steam Turbine 15 Supply Line (Line) 16 Compressor 20 Supply Line (Line) 21 Slurry Pump 22 Gas-Liquid Separator (Separator) 24 Compressor 25 Combustor 31 Gas turbine 33 Waste heat boiler 38 Circulation line (other line) 39 Steam turbine 43 Return line (line)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F02C 3/30 F02C 6/18 A 6/18 7/143 7/143 7/22 D 7/22 C10L 3 / 00 A F term (reference) 3G081 BA02 BA12 BA15 BB00 BC07 BD00 4H013 BA03

Claims (14)

[Claims] Combustion gas and steam generated by pressurizing a hydrate slurry fuel obtained by adding a combustible slurry medium to a hydrate, mixing the hydrate slurry fuel with pressurized combustion air, and burning the mixture. A power generation method using hydrate slurry fuel, characterized in that power is generated through a gas turbine using the mixed gas of (1), and power is generated through steam turbine using steam generated by the mixed gas discharged from the gas turbine. 2. Pressurizing a hydrate slurry fuel obtained by adding a combustible slurry medium to a hydrate, separating the hydrate slurry fuel into a gas fuel, a liquid fuel and water,
A power generation method using a hydrate slurry fuel characterized by generating power through a gas turbine using a mixed gas of combustion gas and water vapor generated by mixing and burning the compressed air for combustion. 3. The hydrate according to claim 2, wherein at least a portion of water generated when the hydrate slurry fuel is decomposed is evaporated from the mixed gas, and then mixed with another separated hydrate slurry fuel and burned. Power generation method using rate slurry fuel. 4. A hydrate slurry fuel comprising a hydrate and a combustible slurry medium added thereto is pressurized, and the hydrate slurry fuel is separated into gas fuel, liquid fuel and water,
Next, power is generated through a gas turbine using a mixed gas of combustion gas and steam generated by mixing and burning with the pressurized combustion air, and steam generated by the mixed gas discharged from the gas turbine is further generated. A power generation method using hydrate slurry fuel, wherein power is generated through a steam turbine. 5. The power generation method using hydrate slurry fuel according to claim 4, wherein a part of water generated when the hydrate slurry fuel is decomposed is introduced into another line provided with a steam turbine. 6. The power generation method using hydrate slurry fuel according to claim 4, wherein a part of steam in another line provided with the steam turbine is mixed with the separated hydrate slurry fuel and burned. 7. The method according to claim 1, wherein at least one of heat generated when pressurizing the combustion air and air heat before pressurization is absorbed by cold heat of the hydrate slurry fuel. Power generation method using hydrate slurry fuel. 8. A slurry pump for pressurizing hydrate slurry fuel obtained by adding a combustible slurry medium to hydrate, a compressor for pressurizing combustion air, and mixing the hydrate slurry fuel with combustion air. A combustor that burns,
A gas turbine that generates electric power by being driven by a mixed gas of the combustion gas and steam generated in the combustor, a waste heat boiler that turns water in another line into steam by the mixed gas, A power generator using hydrate slurry fuel, comprising: a steam turbine that drives and generates power. 9. A slurry pump for pressurizing a hydrate slurry fuel in which a flammable slurry medium is added to a hydrate, a compressor for pressurizing combustion air, and a gas fuel, a liquid fuel and a water for the hydrate slurry. A combustor that mixes gas fuel, liquid fuel, and water with pressurized combustion air for combustion, and is driven by a mixed gas of combustion gas and steam generated in the combustor. A power generator using hydrate slurry fuel, comprising a gas turbine for generating power. 10. The power generation using the hydrate slurry fuel according to claim 9, further comprising an exhaust heat boiler that converts at least a part of the water of the hydrate slurry fuel separated by the separator into steam with the mixed gas and returns the steam to the combustor. apparatus. 11. A slurry pump for pressurizing a hydrate slurry fuel obtained by adding a combustible slurry medium to a hydrate, a compressor for pressurizing combustion air, and a gas fuel, a liquid fuel and a water for the hydrate slurry fuel. A combustor that mixes gaseous and liquid fuels and water with pressurized combustion air and burns it; and generates electricity by driving with a mixed gas of combustion gas and steam generated in the combustor. And a steam turbine that generates electricity by driving the steam generated by the exhaust heat boiler, and a steam turbine that generates water by using the mixed gas to convert water in another line into steam. A power generator using slurry fuel. 12. A line connecting the separator to another line so as to introduce a part of the water of the hydrate slurry fuel separated by the separator to another line equipped with a steam turbine. Item 11. A power generator using hydrate slurry fuel according to item 11. 13. A line connecting the other line and the combustor so that a part of the water converted into steam by the exhaust heat boiler is returned to the combustor in another line provided with the steam turbine. 13. A power generator using hydrate slurry fuel according to item 12. 14. A hydrate slurry fuel line is connected to the compressor so that at least one of heat generated when pressurizing the combustion air and air heat before pressurization is absorbed by cold heat of the hydrate slurry fuel. 8, 9, 1
A power generator using hydrate slurry fuel according to 0, 11, 12, or 13.