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Gasifying combined power generating apparatus

A power generation equipment, coal gasification technology, applied in the direction of mechanical equipment, combustion equipment, lighting and heating equipment, etc., can solve the problems of shortening the life of the burner, backflow, gas turbine operation failure, etc.

Inactive Publication Date: 2008-04-09
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the internal pressure of the coal gasification fuel flow path 14 for supplying the coal gasification fuel c is lower than the internal pressure of the burner sleeve 4 filled with the combustion gas 21 generated by the combustion of the liquid fuel a, as Figure 11 As shown by the middle arrow e, due to the pressure difference, the combustion gas 21 flows back from the side of the burner sleeve 4 into the coal gasification fuel flow path 14
[0017] 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 .
[0018] This backflow phenomenon of the combustion gas 21 becomes the 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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  • Gasifying combined power generating apparatus
  • Gasifying combined power generating apparatus
  • Gasifying combined power generating apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0041] The first embodiment (Fig. 1- image 3 )

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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 ...

no. 2 Embodiment

[0060] The second embodiment ( Figure 4 )

[0061] Figure 4 It is an enlarged cross-sectional view showing the fuel nozzle 65 portion of the burner 35 in the coal gasification fuel combined power generation facility of this embodiment.

[0062] This example Figure 4As shown, on the fuel nozzle 65 that sprays fuel to the burner 35, a liquid fuel flow path 72, an air flow path 73 for atomization, and a coal gasification fuel flow path 74 are arranged in a state of being adjacent to each other. The flow path wall 76 near the outlet of the air flow path 73 for atomization is provided with a spray hole 82 for blowing atomization air into the fuel flow path for coal gasification. 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...

no. 3 Embodiment

[0066] The third embodiment ( Figure 5 )

[0067] Figure 5 It is an enlarged cross-sectional view showing the combustion nozzle 65 of the burner 35 in the combined coal gasification power generation facility of this embodiment.

[0068] This example Figure 5 As shown, 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 connection to the coal gasification fuel flow path 74 is provided. The outlet portion is a combustion air ejection portion 83 that ejects combustion air. 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 fu...

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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

technical field [0001] 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 [0002] 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 source has been progressing in gas turbine power plants and hybrid power plants. [0003] Coal gasification power generation equipment generates electricity by using the air boosted by the gas turbine compressor or the oxygen generated by introducing the air into the air se...

Claims

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Application Information

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IPC IPC(8): F23D14/76F23D17/00C10J3/46F02C3/28F02C7/22F02C7/232F23R3/26F23R3/28F23R3/36
CPCF23R3/36Y02E20/16F02C3/28F23D17/002Y02E20/18F23R2900/00002
Inventor 小野田昭博岩井保宪
Owner KK TOSHIBA
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