JP5107182B2 - Coal gasification combined power generation facility - Google Patents

Description

  The present invention relates to a combined coal gasification combined power generation facility.

  Coal gasification combined cycle (IGCC) used for gas turbine combined power generation by converting solid fuel coal into coal gasification gas by a coal gasification furnace is known. Coal gasification combined power generation uses abundant reserves of coal resources, has higher thermal efficiency than conventional pulverized coal thermal power generation, and emits less air pollutants such as carbon dioxide. Is discharged as a glassy molten slag, and has an advantage that the volume is reduced. Therefore, the coal gasification combined power generation is being developed as a technology that will become the main power of future coal-fired power generation (for example, Patent Document 1).

When coal is gasified in the above-described coal gasification combined power generation facility, the exhaust gas extracted from the gas turbine is used as the dry hot gas used in the coal pulverizer, and the dry hot gas after being used for drying is It was released to the atmosphere through the exhaust heat recovery boiler chimney.
JP-A-10-330766

Here, when a CO shift reaction process for reducing carbon dioxide emissions is incorporated into a coal gasification combined power generation facility, the water requirement increases, so it is included in water supply facilities and discharged water. There has been a problem that processing equipment for processing harmful substances such as mercury and H ₂ S is enlarged.

On the other hand, the moisture extracted by the drying process of coal is released into the atmosphere together with the drying gas, either directly or via an exhaust heat recovery boiler.
In the process of drying the coal, environmentally regulated substances such as mercury contained in the coal may be released from the coal and released into the atmosphere together with the moisture and drying gas described above.

The present invention has been made to solve the above-described problems, and is a coal gasification combined power generation facility that can reduce the size and power consumption of the facility by reducing water consumption in the power generation facility. The purpose is to provide.
An object of the present invention is to provide a combined coal gasification combined power generation facility that can reduce the amount of mercury released from the power generation facility to the atmosphere and improve the compatibility with the environment by processing mercury.

In order to achieve the above object, the present invention provides the following means.
The coal gasification combined power generation facility of the present invention is a coal gasification facility that processes pulverized coal crushed by a coal pulverizer and converts it into gaseous fuel, and purifies the converted gaseous fuel, and converts the gaseous fuel into the gaseous fuel. Steam generated in a gas purification facility for treating contained mercury, a gas turbine facility operated using the gaseous fuel treated with mercury as fuel, and an exhaust heat recovery boiler into which combustion exhaust gas of the gas turbine facility has been introduced A steam turbine facility operated by the generator, a generator connected to at least one of the gas turbine facility and the steam turbine facility, and a dry hot gas supply unit for supplying a dry hot gas for drying coal to the coal pulverizer , oxygen from the dry-heat gas separated after being supplied to the coal mill, to supply the dry heat gas after oxygen separation into the gas purification equipment A separation unit, characterized in that is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the water consumption in a coal gasification combined cycle power generation facility is reduced by using the water | moisture content contained in the dry hot gas after oxygen was isolate | separated for the refinement | purification of the gaseous fuel in a gas purification facility. Therefore, it is possible to reduce the size of the water supply facility and to save labor such as electric power used for water supply.

  Further, the mercury contained in the dry hot gas after the oxygen is separated is processed in the gas purification facility together with the mercury contained in the gaseous fuel. Therefore, the amount of mercury released from the coal gasification combined power generation facility into the atmosphere can be reduced, and the coal gasification combined power generation facility can be prevented from being enlarged.

  On the other hand, oxygen separated from the dry hot gas can be used for other equipment such as gas turbine equipment. Further, oxygen separated from the dry hot gas may be released to the atmosphere as it is.

The coal gasification combined power generation facility of the present invention is a coal gasification facility that processes pulverized coal crushed by a coal pulverizer and converts it into gaseous fuel, and purifies the converted gaseous fuel, and converts the gaseous fuel into the gaseous fuel. Steam generated in a gas purification facility for treating contained mercury, a gas turbine facility operated using the gaseous fuel treated with mercury as fuel, and an exhaust heat recovery boiler into which combustion exhaust gas of the gas turbine facility is introduced A steam turbine facility operated by the generator, a generator connected to at least one of the gas turbine facility and the steam turbine facility, and a dry hot gas supply unit for supplying a dry hot gas for drying coal to the coal pulverizer separates the water from the dry heat gas after being supplied to the coal mill, a separating section for supplying the moisture to the gas purification equipment, is provided It is characterized in that is.

ADVANTAGE OF THE INVENTION According to this invention, the water consumption in a coal gasification combined cycle power generation facility is reduced by using the water | moisture content contained in dry hot gas for refinement | purification of the gaseous fuel in a gas purification facility. Therefore, it is possible to reduce the size of the water supply facility and to save labor such as electric power used for water supply.
Examples of the purification of gaseous fuel using water in a gas purification facility include a CO shift reaction process.

  In the above invention, it is desirable that the separation unit further separates oxygen from the dry hot gas and supplies the dry hot gas after oxygen separation to the gas purification facility.

According to the present invention, oxygen separated from the dry hot gas can be used for other equipment such as gas turbine equipment.
Mercury contained in the dry hot gas after the oxygen is separated is treated in a gas purification facility together with mercury contained in the gaseous fuel. Therefore, the amount of mercury released from the coal gasification combined power generation facility into the atmosphere can be reduced, and the coal gasification combined power generation facility can be prevented from being enlarged.

  In the said invention, it is desirable for the said dry hot gas supply part to extract the said dry hot gas from the said waste heat recovery boiler.

According to the present invention, by extracting a part of the combustion exhaust gas introduced into the exhaust gas recovery boiler as a dry hot gas, it is not necessary to separately provide a facility for supplying the dry hot gas, thereby reducing the size of the facility. it can.
Furthermore, it is not necessary to separately generate the dry hot gas, and it is possible to save labor such as electric power used to generate the dry hot gas.

  According to the coal gasification combined power generation facility of the present invention, the water consumption in the coal gasification combined power generation facility is reduced by using the moisture contained in the dry hot gas for the purification of gaseous fuel in the gas purification facility. There exists an effect that size reduction and power saving can be achieved.

  According to the coal gasification combined power generation facility of the present invention, the mercury contained in the dry hot gas is processed in the gas purification facility together with the mercury contained in the gaseous fuel, so that the amount of mercury released from the power generation facility to the atmosphere is reduced. In addition, there is an effect that compatibility with the environment can be improved by processing mercury.

[First Embodiment]
Hereinafter, a combined coal gasification combined cycle facility according to a first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a schematic diagram illustrating the configuration of the coal gasification combined power generation facility according to the present embodiment.
The combined coal gasification combined power generation facility 1 of this embodiment includes a coal gasification facility 2, a gas purification facility 3, a gas turbine facility 4, a steam turbine facility 5, an exhaust heat recovery boiler (HRSG) 6, and power generation. Machines 7G and 7S, a dry hot gas supply unit 8, and an oxygen separation facility 9 are provided.

2 and 3 are schematic diagrams illustrating the configuration of the coal gasification facility of FIG.
The coal gasification facility 2 generates a gas containing a combustible component from the supplied coal, that is, a fuel gas, and supplies the gas to the gas turbine facility 4 through the gas purification facility 3.
2 and 3, the coal gasification facility 2 includes a raw coal bunker conveyor 21, a raw coal bunker 22, a pulverized coal machine 23, a pulverized coal dust collector 24, a pulverized coal hopper 25, coal, A gasification furnace (SGC) 26, a cyclone 27A, a porous filter 27B, a char bin 28, and a char supply hopper 29 are provided.

  As shown in FIG. 2, the raw coal bunker conveyor 21 is a conveyor that supplies, for example, raw coal in a coal storage yard to the raw coal bunker 22, and the raw coal bunker 22 uses the raw coal supplied by the raw coal bunker conveyor 21. After temporarily storing, raw coal is supplied to the pulverized coal machine 23.

The pulverized coal machine 23 pulverizes the raw raw coal supplied from the raw coal bunker 22 and is, for example, pulverized coal of several μm to several hundred μm. The pulverized coal machine 23 is supplied with dry hot gas from the dry hot gas supply unit 8 and is used for drying coal. The pulverized pulverized coal is sent to the pulverized coal dust collector 24 together with the dry hot gas.
The pulverized coal machine 23 is classified into a form such as a tube mill, a ball mill, and a roller mill depending on the form of crushing the coal, and any type of the pulverized coal machine 23 may be used and is not particularly limited.

The pulverized coal dust collector 24 separates the pulverized coal pulverized by the pulverized coal machine 23 from the dry hot gas obtained by drying the coal. The separated pulverized coal is sent to the pulverized coal hopper 25, and the separated dry hot gas is sucked into the pulverized coal drying blower 81.
The pulverized coal hopper 25 temporarily stores the pulverized coal separated by the pulverized coal dust collector 24, and the stored pulverized coal together with the compressed air supplied from the air booster 45, the combustor 26 </ b> C and the reductor of the coal gasification furnace 26. 26D.

The coal gasification furnace 26 processes the supplied pulverized coal and converts it into gaseous fuel.
The coal gasification furnace 26 is connected to a coal gasification unit 26A formed so that gas flows from below to above and to the downstream side of the coal gasification unit 26A, and gas flows from above to below. The heat exchange part 26B formed so that it may be formed is provided.

The coal gasification unit 26A is provided with a combustor 26C and a reductor 26D from below.
In the combustor 26C, a part of the supplied pulverized coal and char is combusted, and the remaining pulverized coal and char are thermally decomposed by combustion heat and released as volatile components (CO, H ₂ , lower hydrocarbons). In the present embodiment, the description is applied to an example in which a spouted bed is adopted as the combustor 26C, but a fluidized bed type or a fixed bed type may be adopted and is not particularly limited.

  Since the interior of the combustor 26C is operated at a temperature equal to or higher than the melting point of the coal ash, the coal ash is completely melted and discharged as a glassy slag from the lower outlet of the combustor 26C.

In the reductor 26D, the supplied pulverized coal is gasified by the high-temperature combustion gas flowing from the combustor 26C. Thus, the combustible gas as a gaseous fuel ₂ such as CO and H from coal is produced. The coal gasification reaction is an endothermic reaction in which pulverized coal and carbon in char react with CO ₂ and H ₂ O in high-temperature gas to generate CO and H ₂ .

  The heat exchange part 26B of the coal gasification furnace 26 is provided with a plurality of heat exchangers 26E that recover sensible heat from the gas guided from the reductor 26D. The heat recovered by the heat exchanger 26E is supplied as steam to the steam turbine facility 5 through the exhaust heat recovery boiler 6.

The cyclone 27 </ b> A and the porous filter 27 </ b> B separate char from the gaseous fuel flowing out from the coal gasification furnace 26. The cyclone 27A is a cyclone type dust collector into which gaseous fuel directly flows from the coal gasifier 26, and the porous filter 27B is a dust collector into which gaseous fuel once separated by the cyclone 27A flows.
The char separated by the cyclone 27A and the porous filter 27B is sent to the char bin 28, and the gaseous fuel after the char separation is supplied to the gas purification facility 3.

  In addition, as a cyclone 27A and the porous filter 27B, a well-known thing can be used and it does not specifically limit.

  The char bin 28 temporarily stores the char separated by the cyclone 27 </ b> A and the porous filter 27 </ b> B and supplies the char to the char supply hopper 29. The char supply hopper 29 feeds the char supplied from the char bin 28 into the coal gasification furnace 26.

FIG. 4 is a schematic diagram illustrating the configuration of the gas purification facility, the gas turbine facility, and the oxygen separation facility of FIG.
As shown in FIGS. 1 and 4, the gas purification facility 3 purifies the gaseous fuel converted in the coal gasification facility 2 and processes mercury contained in the gaseous fuel. The gaseous fuel purified by the gas purification facility 3 is supplied to the gas turbine facility 4. In addition, moisture and mercury are supplied to the gas purification facility 3 together with the dry hot gas from which oxygen is separated from the oxygen separation facility 9.

Examples of the purification of the gaseous fuel include various types such as purification by a CO shift reaction (CO + H ₂ O → CO ₂ + H ₂ ) using carbon monoxide contained in the gaseous fuel and moisture supplied from the oxygen separation facility 9. These purification methods can be mentioned.
On the other hand, the treatment of mercury is a treatment for removing mercury contained in the gaseous fuel and the dry hot gas, and a known treatment method can be used and is not particularly limited.

  Between the coal gasifier 26 and the cyclone 27A, between the porous filter 27B and the gas purification facility 3, and between the gas purification facility 3 and the gas turbine facility 4, as shown in FIGS. A branch path is provided, and a ground flare 32 is provided on the downstream side of the branch path via an on-off valve 31. The ground flare 32 is a facility that burns and processes a gas having a small calorific value that is generated when the coal gasification furnace 26 is started.

  As shown in FIG. 4, the gas turbine equipment 4 is provided with a turbo compressor 41, a combustor 42, a turbine 43, a rotating shaft 44, and an air booster 45.

  The turbo compressor 41 sucks and compresses air, and then supplies the compressed air to the combustor 42. The turbo compressor 41 is provided on the rotary shaft 44 and is rotationally driven by the rotary shaft 44.

  The combustor 42 burns a mixture of compressed air supplied from the turbo compressor 41 and gaseous fuel supplied from the gas purification equipment 3, and supplies combustion gas to the turbine 43.

The turbine 43 generates a rotational driving force using the combustion gas generated by the combustor 42, in other words, converts a part of the heat energy or the like of the combustion gas into rotational energy. The rotational driving force generated in the turbine 43 is transmitted to the turbo compressor 41 and the generator 7G via the rotating shaft 44.
The combustion exhaust gas discharged from the turbine 43 is guided to the exhaust heat recovery boiler 6.

  The rotating shaft 44 transmits the rotational driving force generated in the turbine 43 to the turbo compressor 41 and the generator 7G, and the turbo compressor 41, the turbine 43, and the generator 7G are arranged on the rotating shaft 44. Has been.

  The air booster 45 extracts a part of the compressed air from the turbo compressor 41, further boosts the pressure, and supplies it to the coal gasification furnace 26. The compressed air supplied to the coal gasification furnace 26 is sent into the coal gasification furnace 26 together with pulverized coal and char.

FIG. 5 is a schematic diagram illustrating the configuration of the exhaust heat recovery boiler and the steam turbine equipment of FIG.
As shown in FIGS. 4 and 5, the exhaust heat recovery boiler 6 uses the heat of the combustion exhaust gas discharged from the gas turbine equipment 4 and the heat recovered by the heat exchange unit 26 </ b> B of the coal gasification furnace 26. It generates high-pressure steam.
The high-pressure steam generated by the exhaust heat recovery boiler 6 is supplied to the high-pressure turbine 51 of the steam turbine equipment 5. The steam that has driven the high-pressure turbine 51 of the steam turbine facility 5 returns to the exhaust heat recovery boiler 6 and is reheated, and is supplied to the intermediate pressure turbine 52 as high-temperature reheated steam.

The exhaust heat recovery boiler 6 is provided with a denitration facility (SCR) 61, and after generating high-pressure steam and reheat steam, the combustion exhaust gas is freed of sulfur contained in the combustion exhaust gas in the denitration facility 61. As the denitration equipment 61, a known denitration equipment can be used. This denitration equipment 61 mainly removes SO ₂ in the combustion exhaust gas.

  A chimney 62 is provided downstream of the combustion exhaust gas flow of the denitration facility 61, and the combustion exhaust gas is discharged from the chimney 62 to the atmosphere.

  As shown in FIGS. 1 and 2, the dry hot gas supply unit 8 is a pipe that supplies dry hot gas used for drying coal to the pulverized coal machine 23 of the coal gasification facility 2. As shown in FIG. 5, the dry hot gas supply unit 8 bleeds coal while extracting a part of the flue gas downstream from the flue gas flow of the denitration facility 61 and the chimney 62 in the exhaust heat recovery boiler 6. After that, the combustion exhaust gas is returned to the chimney 62.

  As shown in FIG. 1 and FIG. 2, a pulverized coal drying blower 81 is provided downstream of the dry hot gas flow of the pulverized coal dust collector 24 in the dry hot gas supply unit 8. The pulverized coal drying blower 81 sucks dry hot gas from the pulverized coal dust collector 24 and sends the dry hot gas toward the chimney 62. In this way, by blowing the dry hot gas by the pulverized coal drying blower 81, the combustion exhaust gas is supplied to the pulverized coal machine 23 as the dry hot gas.

  As shown in FIGS. 1 and 5, the oxygen separation facility 9 separates oxygen contained in the dry hot gas after drying the coal, and the separated dry hot gas together with moisture and mercury contained therein. The gas is supplied to the gas purification facility 3. The oxygen separation facility 9 is provided downstream of the dry hot gas of the pulverized coal drying blower 81, and the separated oxygen and the like are sent to the chimney 62.

  As a method of oxygen separation, the gas is cooled to the vicinity of the liquefaction point by repeating compression and expansion, and a specific gas (in this case, oxygen) is utilized by utilizing the difference in the liquefaction point of each gas component constituting the gas. A cryogenic separation method for separation / extraction is generally used, but other methods such as a membrane separation method or an adsorption separation method may be used and are not particularly limited.

  In the present embodiment, the separated oxygen is applied to an example in which the separated oxygen is released into the atmosphere from the chimney 62. However, the separated oxygen may be supplied to other equipment such as the gas turbine equipment 4, and is particularly limited. Not what you want.

  As shown in FIG. 5, the steam turbine facility 5 is provided with a high-pressure turbine 51, an intermediate-pressure turbine 52, a low-pressure turbine 53, and a rotating shaft 54.

The high-pressure turbine 51, the intermediate-pressure turbine 52, and the low-pressure turbine 53 generate a rotational driving force using the high-pressure steam generated in the exhaust heat recovery boiler 6, in other words, the heat energy of the high-pressure steam and the like. The part is converted into rotational energy.
The high-pressure steam generated in the exhaust heat recovery boiler 6 is directly supplied to the high-pressure turbine 51. The steam discharged from the high-pressure turbine 51 is returned to the exhaust heat recovery boiler 6, reheated and supplied to the intermediate pressure turbine 52 as high-temperature reheat steam. Steam discharged from the intermediate pressure turbine 52 is supplied to the low pressure turbine 53.

  The rotary shaft 54 is provided with a high-pressure turbine 51, an intermediate-pressure turbine 52, and a low-pressure turbine 53, and the rotational driving force generated in the high-pressure turbine 51, the intermediate-pressure turbine 52, and the low-pressure turbine 53 is supplied to the generator 7S. To communicate.

  The generator 7G is driven to rotate by the rotating shaft 54 of the gas turbine facility 4 to generate power, and the generator 7S is driven to rotate by the rotating shaft 54 of the steam turbine facility 5 to generate power.

  Next, a method for recovering moisture and treating mercury contained in the dry hot gas in the combined coal gasification combined power generation facility 1 having the above-described configuration will be described.

  As shown in FIGS. 1 and 2, the dry hot gas used for drying the coal in the coal gasification facility 2 includes moisture and mercury contained in the coal. The dry hot gas containing moisture and mercury is separated from the pulverized coal in the pulverized coal dust collector 24, sucked into the pulverized coal drying blower 81, and blown toward the oxygen separation facility 9.

Oxygen is separated from the dry hot gas in the oxygen separation facility 9, and moisture and mercury remain in the dry hot gas after separation. The dry hot gas containing moisture and mercury is supplied from the oxygen separation facility 9 to the gas purification facility 3.
The moisture contained in the dry hot gas is used for the CO shift reaction in the gas purification facility 3, and the mercury contained in the dry hot gas is processed in a mercury processing unit provided in the gas purification facility 3.
In addition, the mercury processing part of the gas purification facility 3 processes mercury contained in the dry hot gas and mercury contained in the gaseous fuel converted by the coal gasification facility 2.

  According to said structure, the water consumption in the coal gasification combined cycle power generation equipment 1 reduces by using the water | moisture content contained in the dry hot gas after oxygen was isolate | separated for the refinement | purification of the gaseous fuel in the gas purification equipment 3. Is done. Therefore, it is possible to reduce the size of the water supply facility and to save labor such as electric power used for water supply.

  Further, mercury contained in the dry hot gas after the oxygen is separated is processed in the gas purification facility 3. Therefore, the amount of mercury released from the coal gasification combined power generation facility 1 to the atmosphere can be reduced, and the coal gasification combined power generation facility 1 can be prevented from being enlarged.

  On the other hand, oxygen separated from the dry hot gas can be used for other equipment such as the gas turbine equipment 4. Further, oxygen separated from the dry hot gas may be released to the atmosphere as it is.

By extracting a part of the combustion exhaust gas introduced into the exhaust heat recovery boiler 6 as a dry hot gas, it is not necessary to separately provide a facility for supplying the dry hot gas, and the coal gasification combined power generation facility 1 is reduced in size. be able to.
Furthermore, it is not necessary to separately generate the dry hot gas, and it is possible to save labor such as electric power used to generate the dry hot gas.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
The basic configuration of the coal gasification combined power generation facility of the present embodiment is the same as that of the first embodiment, but differs from the first embodiment in that the oxygen separation facility is changed to a moisture separation facility. Yes. Therefore, in this embodiment, only the periphery of the water separation facility will be described with reference to FIG. 6, and description of other components and the like will be omitted.
FIG. 6 is a schematic diagram illustrating the configuration around the water separation facility of the present embodiment.
In addition, about the component same as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 6, the coal gasification combined power generation facility 101 of the present embodiment includes a coal gasification facility 2, a gas purification facility 3, a gas turbine facility 4, and a steam turbine facility 5 (see FIG. 1). The exhaust heat recovery boiler 6, the generators 7 </ b> G and 7 </ b> S (see FIG. 1), the dry heat gas supply unit 8, and the moisture separation equipment 109 are provided.

  The water separation equipment 109 separates the water contained in the dry hot gas after drying the coal and supplies it to the gas purification equipment 3. The water separation equipment 109 is provided downstream of the dry hot gas of the pulverized coal dry blower 81, and the separated dry hot gas after separation is sent to the chimney 62.

  As a method of separating water, there is a method of recovering condensed moisture by cooling dry hot gas with a heat exchanger, but other methods may be used and are not particularly limited.

  Next, a method for recovering and treating moisture contained in the dry hot gas in the coal gasification combined power generation facility 101 having the above-described configuration will be described.

As shown in FIG. 6, the dry hot gas used for drying the coal in the coal gasification facility 2 includes moisture contained in the coal. The dry hot gas containing moisture is separated from the pulverized coal in the pulverized coal dust collector 24 (see FIG. 1), sucked into the pulverized coal drying blower 81, and blown toward the moisture separation facility 109.
The dry hot gas is separated from moisture in the moisture separation facility 109, and the separated moisture is supplied to the gas purification facility 3. Moisture is used for the CO shift reaction in the gas purification facility 3.

  According to said structure, the water consumption in the coal gasification combined cycle power generation equipment 101 is reduced by using the water | moisture content contained in dry hot gas for the refinement | purification of the gaseous fuel in the gas purification equipment 3. FIG. Therefore, it is possible to reduce the size of the water supply facility and to save labor such as electric power used for water supply.

  Further, oxygen may be separated from the dry hot gas from which moisture has been separated, and the dry hot gas after the oxygen separation may be supplied to the gas purification facility 3.

  Mercury contained in the dry hot gas after oxygen is separated is processed in the gas purification facility 3. Therefore, the amount of mercury released from the coal gasification combined power generation facility 1 to the atmosphere can be reduced, and the coal gasification combined power generation facility 1 can be prevented from being enlarged.

  On the other hand, oxygen separated from the dry hot gas can be used for other equipment such as the gas turbine equipment 4. Further, oxygen separated from the dry hot gas may be released to the atmosphere as it is.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

It is a schematic diagram explaining the structure of the coal gasification combined cycle power generation equipment which concerns on the 1st Embodiment of this invention. It is a schematic diagram explaining the structure of the coal gasification installation of FIG. It is a schematic diagram explaining the structure of the coal gasification installation of FIG. It is a schematic diagram explaining the structure of the gas purification equipment of FIG. 1, gas turbine equipment, and oxygen separation equipment. It is a schematic diagram explaining the structure of the waste heat recovery boiler and steam turbine equipment of FIG. It is a schematic diagram explaining the structure of the water | moisture-content separation equipment periphery of the 2nd Embodiment of this invention.

Explanation of symbols

1,101 Coal gasification combined power generation facility 2 Coal gasification facility 3 Gas purification facility 4 Gas turbine facility 5 Steam turbine facility 6 Waste heat recovery boiler 7G, 7S Generator 8 Drying heat gas supply unit 9 Oxygen separation facility 109 Moisture separation facility

Claims (4)

Coal gasification equipment for processing pulverized coal crushed by a coal pulverizer and converting it to gaseous fuel;
A gas purification facility for refining the converted gaseous fuel and processing mercury contained in the gaseous fuel;
A gas turbine facility operated using the gaseous fuel treated with mercury as fuel,
Steam turbine equipment operated by steam generated in the exhaust heat recovery boiler into which the combustion exhaust gas of the gas turbine equipment is introduced, and
A generator coupled to at least one of the gas turbine facility and the steam turbine facility;
A dry hot gas supply unit for supplying a dry hot gas for drying the coal to the coal pulverizer;
A separation unit for separating oxygen from the dry hot gas after being supplied to the coal pulverizer, and supplying the dry hot gas after oxygen separation to the gas purification facility;
Coal gasification combined power generation facility characterized by being provided. Coal gasification equipment for processing pulverized coal crushed by a coal pulverizer and converting it to gaseous fuel;
A gas purification facility for refining the converted gaseous fuel and processing mercury contained in the gaseous fuel;
A gas turbine facility operated using the gaseous fuel treated with mercury as fuel,
Steam turbine equipment operated by steam generated in the exhaust heat recovery boiler into which the combustion exhaust gas of the gas turbine equipment is introduced, and
A generator coupled to at least one of the gas turbine facility and the steam turbine facility;
A dry hot gas supply unit for supplying a dry hot gas for drying the coal to the coal pulverizer;
A separation unit that separates moisture from the dry hot gas after being supplied to the coal crusher, and supplies the moisture to the gas purification facility;
Coal gasification combined power generation facility characterized by being provided.   The coal gasification combined power generation facility according to claim 2, wherein the separation unit further separates oxygen from the dry hot gas and supplies the dry hot gas after the oxygen separation to the gas purification facility. . The coal gasification combined power generation facility according to any one of claims 1 to 3, wherein the dry hot gas supply unit extracts the dry hot gas from the exhaust heat recovery boiler.

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