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Operating method for coal gasification combined cycle power plant

An operation method and technology for power generation equipment, applied in mechanical equipment, combustion equipment, combustion methods, etc., can solve the problems of gas turbine operation failure, shortening the life of the burner, damage to the fuel nozzle, etc.

Inactive Publication Date: 2008-07-30
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In addition, even if no pressure difference occurs, the combustion gas 21 may flow back into the coal gasification fuel flow path 14 due to only fluctuations in the dynamic pressure of the combustion gas 21 or pressure fluctuations in the burner 1 .
[0019] This backflow phenomenon of the combustion gas 21 becomes a cause of damage to the fuel nozzle 5, causes troubles in the operation of the gas turbine, shortens the life of the combustor, etc., and causes various problems in terms of use and economy.

Method used

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  • Operating method for coal gasification combined cycle power plant
  • Operating method for coal gasification combined cycle power plant
  • Operating method for coal gasification combined cycle power plant

Examples

Experimental program
Comparison scheme
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no. 1 Embodiment

[0038] The first embodiment (Fig. 1 to Fig. 3)

[0039] FIG. 1 is a system diagram showing the overall structure of a combined coal gasification power generation facility according to an embodiment of the present invention.

[0040] As shown in FIG. 1 , the combined coal gasification power generation equipment of this embodiment generally includes: a gas turbine system 31 ; a fuel supply system 32 ; an air supply system 33 ; an exhaust system 34 and so on.

[0041] The gas turbine system 31 has: a burner 35 capable of selectively combusting coal gasification fuel c and liquid fuel a; a gas turbine 36 driven by combustion gas generated by the burner 35; coaxially arranged with the gas turbine 36 Gas turbine compressor 37 and generator 38.

[0042] The fuel supply system 32 is composed of two systems of a coal gasification fuel supply system 32a and a liquid fuel supply system 32b. The coal gasification fuel supply system 32a has a gasification furnace 39 for gasifying coal an...

no. 2 Embodiment

[0058] The second embodiment (Fig. 4)

[0059] Fig. 4 is an enlarged cross-sectional view showing a fuel nozzle 65 portion of the burner 35 in the coal gasification fuel combined power generation facility of this embodiment.

[0060] In this embodiment, as shown in FIG. 4 , a liquid fuel flow path 72 , an air flow path 73 for atomization, and a coal gasification fuel flow path are arranged adjacent to each other on the fuel nozzle 65 that ejects fuel to the burner 35 . 74, and on the flow path wall 76 near the outlet of the atomization air flow path 73, there is provided a spray hole 82 for blowing atomization air into the coal gasification fuel flow path. The spray holes 82 for the atomization air are formed in a plurality along the circumferential direction of the fuel nozzle 65, and are opened near the discharge ports 80 of the coal gasification fuel flow path 74, for example, continuously spray particles to the inner surface of the swirler 79. Then, the air b for atomizat...

no. 3 Embodiment

[0064] The third embodiment (Fig. 5)

[0065] Fig. 5 is an enlarged cross-sectional view showing the combustion nozzle 65 of the burner 35 in the combined coal gasification combined power generation facility of this embodiment.

[0066] In this embodiment, as shown in FIG. 5 , at the outlet of the combustion air flow path 63 that blows the combustion air d from the gas turbine compressor 37 (refer to FIG. 1 ) into the combustor sleeve 64, a gasification channel is provided. A combustion air ejection portion 83 ejects combustion air from an outlet portion of the fuel flow path 74 . The combustion air ejection portion 83 includes: for example, a hole 84 pierced on the end wall 64a of the burner sleeve 64 on the combustion nozzle 65 side; The guide member 85 protruding from the inner surface continuously injects the combustion air d to the outside of the swirler 79 of the coal gasification fuel injection port 80 , and an air film can be formed on the coal gasification fuel injec...

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Abstract

A coal gasification combined cycle power generation plant generally includes a gas turbine system (31), a fuel supply system (32), an air supply system (33) and an exhaust gas system (34), which are operatively connected to each other. The gas turbine system (31) includes a combustor (35) for selectively burning a coal gasification fuel obtained by gasifying a coal and a liquid fuel atomized by an atomization air and a gas turbine (36) to which a combustion gas generated in the combustor (35) is supplied. The fuel supply system (32) is provided with a liquid fuel supply passage (43) for the combustor (35) through a fuel nozzle provided for a combustor, an atomization air supply passage (44) for the combustor (35) through the fuel nozzle and a coal gasification fuel supply passage (41) for the combustor (35) through the fuel nozzle, all of these supply passages being arranged so as to be adjacent to each other. The atomization air supply passage (44) is provided with an outlet portion to which a branching outlet port for injecting the atomization air toward an outlet portion of the coal gasification supply passage is formed so as to secure a minimum flow rate for preventing the coal gasification fuel from conversely flowing into the fuel nozzle.

Description

[0001] This application is a divisional application of the Chinese invention patent application with the filing date of August 20, 1998, the application number of 98118636.X, and the title of "combined coal gasification power generation equipment and its operation method". technical field [0002] The present invention relates to a combined coal gasification power generation facility that selectively combusts coal gasification fuel and liquid fuel to obtain power, and an operation method thereof, and particularly relates to appropriately preventing combustion gas from occurring in a fuel flow path of coal gasification fuel when liquid fuel is used Combined coal gasification power generation equipment and its operation method for improving the safety of the burner part by reverse flow. Background technique [0003] In recent years, from the viewpoint of effective utilization of natural resources, research on coal gasification power plants using coal gasification fuel as a heat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/36F23N1/00C10J3/46F02C3/28F02C7/22F02C7/232F23D17/00F23R3/26F23R3/28
CPCY02E20/16F02C3/28F23R2900/00002F23D17/002Y02E20/18F23R3/36
Inventor 小野田昭博岩井保宪
Owner KK TOSHIBA
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