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Heat supply system of fuel gas-steam combined cycle thermal power plant

A combined cycle and heating system technology, applied in steam central heating systems, heating systems, steam superheating, etc., can solve the problem of not effectively utilizing waste heat boiler steam, etc., to achieve easy adjustment, simple equipment settings, and realization of thermoelectricity The effect of decoupling

Pending Publication Date: 2021-06-11
华能江阴燃机热电有限责任公司
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Problems solved by technology

Moreover, in the existing power plant heating system, the steam in the waste heat boiler is not effectively utilized

Method used

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  • Heat supply system of fuel gas-steam combined cycle thermal power plant

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Embodiment

[0018] see figure 1 ,

[0019] A heat supply system of a gas-steam combined cycle thermal power plant, including a steam drum, a first superheater, a second superheater, a third superheater, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a first heat exchanger, a second Heat exchanger, third heat exchanger, first reheater, second reheater, third reheater, waste heat boiler;

[0020] The steam drum 1 is respectively connected to the first superheater 2, the second superheater 3, and the third superheater 4, and the first superheater 2, the second superheater 3, and the third superheater 4 pass through the electronic flow valve 5 and the high-pressure cylinder 6 respectively. The high-pressure cylinder 6 is connected to the first reheater 7 through the electronic flow valve 5, the first reheater 7 is connected to the medium-pressure cylinder 8, and the medium-pressure cylinder 8 is connected to the second reheater 9 through the electronic flow va...

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Abstract

The invention relates to a heat supply system of a fuel gas-steam combined cycle thermal power plant. The heat supply system comprises a steam pocket, a first superheater, a second superheater, a third superheater, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first reheater, a second reheater, a third reheater and a waste heat boiler. The heat supply system has three adjusting modes, under the normal condition, steam is used for power generation by adjusting a valve, only steam in the waste heat boiler is used for supplying heat to a heat supply network, and when the heat demand quantity is high and the electric quantity demand quantity is low, the steam passes through the intermediate-pressure cylinder and the low-pressure cylinder for power generation. The heat supply system has the advantages that equipment arrangement is simple, adjustment is convenient, balance between power generation and heat supply of the thermal power plant is effectively adjusted, and thermoelectric decoupling is achieved.

Description

technical field [0001] The invention relates to the technical field of thermal power plant equipment, in particular to a heat supply system of a gas-steam combined cycle thermal power plant. Background technique [0002] Gas-steam combined cycle thermal power plants have the advantages of high overall cycle efficiency, less environmental pollution, and good peak-shaving performance. With the increasingly stringent national energy structure adjustment and environmental protection requirements, it plays an increasingly important role in the field of urban heating. role. At present, under the condition of rated natural gas volume, the heating capacity of gas-steam combined cycle thermal power plants can meet the requirements of peak heating load. However, due to the explosive growth of natural gas consumption and the continuous expansion of heating demand in recent years, the above heating measures cannot meet the peak heating load demand in actual production. Therefore, how ...

Claims

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Application Information

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IPC IPC(8): F24D1/06F24D19/10F22B31/08F22G3/00F01K13/00
CPCF24D1/06F24D19/1003F22B31/08F22G3/00F01K13/00Y02E20/16
Inventor 毕天盛周民刘景海张慧陈浩俞骏章恂周龙白彬仲益新
Owner 华能江阴燃机热电有限责任公司
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