Method for operating exhaust gas recirculation type gas turbine

An exhaust gas recirculation and gas turbine technology, which is applied to gas turbine devices, mechanical equipment, combined engines, etc., can solve the problems of not disclosing the high-efficiency part-load operating range, not describing the operation information, and reducing the efficiency of the power station. Reduced efficiency, reduced pressure loss, and improved thermal efficiency

Inactive Publication Date: 2004-03-31
MITSUBISHI HITACHIPOWER SYST LTD
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Problems solved by technology

[0004] However, Japanese Patent Application Laid-Open No. 7-34900 does not disclose any measures for realizing the expansion of the high-efficiency part-load operating range through stable exhaust gas recirculation
Moreover, Japanese Patent Laid-Open No. 56-141040 does not describe any information about partial load operation
[0005] Combined cycle power plants are characterized by the presence of an ambient atmospheric temperature which maximizes plant efficiency, at which temperature the plant's efficiency decreases

Method used

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  • Method for operating exhaust gas recirculation type gas turbine
  • Method for operating exhaust gas recirculation type gas turbine
  • Method for operating exhaust gas recirculation type gas turbine

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Embodiment Construction

[0047] Figure 1 shows a first embodiment of the invention. The exhaust gas recirculation combined power plant with a gas turbine inlet water injection system includes: a compressor (compressor) 1 for sucking in and compressing air, a combustor 2 for mixing and burning compressed air and fuel; a a gas turbine 3 driven by combustion gas from the combustion chamber 2; a waste heat recovery boiler 4 for recovering gas turbine waste heat exhausted from the gas turbine 3 to generate steam by heat exchange with supplied water; a steam-driven a steam turbine 5, the steam being generated by a gas turbine waste heat recovery boiler 4; a generator 6 connected to the steam turbine 5; a recirculation device (pipe) 9 comprising a part for taking out a part of the exhaust gas of the gas turbine 3 and A recirculation path which recirculates it to the inlet of a compressor; and a recirculation amount control device (exhaust gas recirculation amount regulating valve) 10 for controlling the reci...

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Abstract

Widening a partial load operation range of an exhaust gas recovery type combined cycle plant in which a gas turbine and steam turbine are combined and further improving heat efficiency. Suppressing a temperature of internal gas in the compressor when recirculating gas turbine exhaust gas at partial load operation time and then returning to the compressor so as to increase exhaust gas recirculation amount. The partial load operation range can be widened and further the heat efficiency can be improved.

Description

technical field [0001] The present invention relates to an operating method of an exhaust gas recirculation type gas turbine plant, and also to a gas turbine plant, and more particularly to an exhaust gas recirculation type combined cycle power plant in which exhaust gas is recirculated to a compressor side of the air intake. Background technique [0002] Japanese Patent Laid-Open No. 7-34900 has disclosed an exhaust gas recirculation type combined power plant in which a part of the exhaust gas from a gas turbine is returned to an inlet of a compressor to increase the compressor air inlet temperature , so that a decrease in combustion temperature or gas turbine exhaust temperature during part load can be prevented, thereby preventing a decrease in cycle thermal efficiency during part load. [0003] In addition, according to Japanese Patent Laid-Open No. 56-141040, water mist is sprayed before recirculated gas enters the compressor, thereby vaporizing the water mist. A cool...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C3/30F02C6/18F02C7/08F02C9/18
CPCF02C3/34F02C3/305F02C9/18Y02E20/16F02C7/08F02C6/18F01D13/00
Inventor 片冈真记宇多村元昭桑原孝明
Owner MITSUBISHI HITACHIPOWER SYST LTD
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