Gas-steam combined system and operation control method thereof

A combined system and gas-steam technology, applied in the energy field, can solve the problems of low efficiency of gas-steam combined system, increase the initial investment of power plants, unfavorable promotion, etc., and achieve the effects of saving high-grade energy, increasing cost, and improving thermal efficiency

Active Publication Date: 2018-03-16
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0002] The operating conditions of the gas-steam combined system are adjusted in real time according to its load status. Due to load changes, the gas-steam combined system often cannot generate electricity at full load, and the efficiency of the gas-steam combined system is relatively low at low loads
[0003] At present, the main way to improve the steam cycle efficiency is to increase the steam inlet parameters of the steam turbine to improve the work efficiency of the steam turbine. However, choosing a steam turbine and waste heat boiler with a higher pressure and higher temperature will greatly increase the initial investment of the power plant and the payback period. Longer, whether it is a new unit or an old unit renovation, it is not conducive to popularization

Method used

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  • Gas-steam combined system and operation control method thereof

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Embodiment Construction

[0020] The present invention will be described in further detail below, but the embodiments of the present invention are not limited thereto.

[0021] Such as figure 1 As shown, the gas-steam combined system includes: a gas unit, a steam unit, a preheating circulation loop, and a heating branch. The gas unit includes a gas turbine 100; the steam unit includes a steam circulation circuit, on which a waste heat boiler 210, a steam turbine 220, and a condenser 230 are arranged, and the waste heat boiler 210 is provided with a waste heat flue 211, from the condenser to the waste heat The pipeline of the boiler 210 or the pipeline in the waste heat boiler 210 is provided with a suction port, and the pipeline from the condenser to the waste heat boiler 210 or the pipeline in the waste heat boiler 210 is provided with a water supply port; preheating cycle loop, preheating cycle A waste heat exchanger 310 and a preheat heat exchanger 320 are provided on the circuit; a fuel heater 410...

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Abstract

The invention provides a gas-steam combined system and an operation control method thereof, wherein the gas-steam combined system comprises a gas generator unit, a steam circulating loop, a pre-heating circulating hoop and a heating branch, wherein a fuel heater is arranged on the heating branch; the fuel heater is provided with a first heat exchange channel and a second heat exchange channel which are matched; the inlet and the outlet of the first heat exchange channel are respectively in butt joint with a water pumping hole and a water compensating hole; the inlet of the second heat exchange channel is in butt joint with the pre-heating heat exchanger; and the outlet of the second heat exchange channel is in butt joint with the gas inlet of a gas turbine engine. A pre-heated circulating working medium circulates in the pre-heating circulating loop for heating the gas entering the gas turbine engine, so that the gas temperature is increased, and steam with greater flow enters the gas turbine engine to do work, thereby improving the efficiency of the whole gas-steam combined system, and avoiding greatly increasing the manufacturing cost of the whole system while improving the thermal efficiency.

Description

technical field [0001] The invention belongs to the field of energy, and in particular relates to a gas-steam combined system and an operation control method thereof. Background technique [0002] The operating conditions of the gas-steam combined system are adjusted in real time according to its load status. Due to load changes, the gas-steam combined system often cannot generate electricity at full load, and the efficiency of the gas-steam combined system is relatively low at low loads. [0003] At present, the main way to improve the steam cycle efficiency is to increase the steam inlet parameters of the steam turbine so as to improve the work efficiency of the steam turbine. However, choosing a steam turbine and waste heat boiler with a higher pressure and higher temperature will greatly increase the initial investment of the power plant and the payback period. Longer, whether it is a new unit or an old unit renovation, it is not conducive to promotion. Contents of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C6/18F02C7/224F01K23/10F01K11/02
CPCF01K11/02F01K23/106F02C6/18F02C7/224F05D2270/303F05D2270/3062
Inventor 郑赟仲伟龙
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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