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Thermoelectric synergistic heat supply system and method for fuel gas thermal power plant
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A thermoelectric synergy and heating system technology, applied in the energy field, can solve problems such as insufficient power supply, waste, and unstored power
Active Publication Date: 2019-10-18
北京热科能源技术研究有限公司
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[0004] The purpose of the present invention is to provide a heat-electricity cooperative heat supply system and method for a gas-fired thermal power plant to solve the problems of insufficient power supply during the peak period of power consumption of the current gas-fired power plant and waste of power due to unstored power during the low-peak period of power consumption
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Embodiment 1
[0055] Embodiment 1 provides the most basic cogeneration heat supply system of a gas-fired thermal power plant, and its structure will be described in detail below.
[0056] refer to figure 1 , the heat-electricity collaborative heating system of the gas-fired thermal power plant includes a heat exchange energy storage system, an electric heat regulation system and a heating network heating system.
[0057] Wherein, the heat exchange energy storage system includes a heat exchanger 1, a heat storage tank 2, a first cold water supply pipe 7, a first hot water return pipe 8, a first circulation pump P1, a first valve V1 and a second valve V2,
[0058] The lower part and the top of the heat exchanger 1 are respectively provided with a flue gas inlet 5 and a flue gas outlet 6, the flue gas inlet 5 is used to communicate with the tail flue of the waste heat boiler of the gas-fired power plant, and the flue gas outlet 6 is used to discharge the inside of the heat exchanger 1 rising ...
Embodiment 2
[0071] On the basis of embodiment 1, in order to further improve the heating capacity of the low-temperature return water of the heating network pipeline, embodiment 2 adds a heating network heater 4, and its connection relationship will be described in detail below.
[0072] refer to figure 2 , the cascade heating device also includes a heat network heater 4, and the heat network heater 4 is an existing mature technology, which is divided into various forms such as a steam-water heat exchanger or a water-water heat exchanger, and the preferred shell in embodiment 2 Tubular steam-water heat exchanger, the shell-and-tube steam-water heat exchanger includes steam inlet, condensate outlet, steam side exhaust pipe, heated water outlet, heated water inlet and water side exhaust pipe, etc.
[0073] As a specific implementation, the heating side of the heating network heater 4 is provided with a steam inlet and a condensate outlet, and the heated side of the heating network heater 4...
Embodiment 3
[0078] On the basis of Example 2, in order to improve the heat exchange efficiency of the flue gas in the heat exchanger 1 and improve the heating capacity of the low-temperature return water in the heating network pipeline, a spray circulation system and an absorption heat pump 18 are added in Example 3, as follows Describe its connection relationship in detail.
[0079] refer to image 3 , the cascade heating device also includes an absorption heat pump 18, which includes an evaporator, a condenser, an absorber, and a generator, etc., wherein the heat network return cold water pipe 13 can be connected with the absorption heat pump 18 absorber, and It can be connected with the condenser, and the outlet of the absorber or the condenser of the absorption heat pump 18 is connected with the inlet of the condenser of the electric heat pump 3 . Specifically, the cooling water return pipe 13 of the heat network is connected with the absorber inlet of the absorption heat pump 18, th...
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Abstract
The invention discloses a thermoelectric synergistic heat supplysystem and method for a fuel gas thermal power plant. The system comprises a heat exchange energy storagesystem, an electric adjustingheating system and a heat network heating system; the heat taking side of a heat storage tank communicates with a heat exchanger through a first hot water supplypipe and a first cold water return pipe to form a heat exchange energy storage circulation loop; the heat storage tank forms an electric adjusting heating circulation loop with an electric heat pump through a second hot water supply pipeand a second cold water return pipe; and a cascade heating device including the electric heat pump, a heat network hot water supply pipe and a heat network cold water return pipe form the heat network heating system. The method comprises heat storage of the heat storage tank and operation regulation of the electric heat pump. The thermoelectric synergistic heat supply system of the fuel gas thermal power plant can effectively recover the smokeexhaust heat of a waste heat boiler of the fuel gas thermal power plant, recycled flue gas heat is used for heating water of a heat network and improving the heat supply capacity of the thermal power plant, and meanwhile, through adjustment and cooperation of the electric heat pump and the heat storage tank, the peak-valley difference between the power peak of the thermal power plant and the power grid load in the power valley period can be relieved.
Description
technical field [0001] The invention relates to the field of energy, and in particular to a thermoelectric coordinated heating system and method for a gas-fired thermal power plant. Background technique [0002] Gas-fired power generation is the process of using natural gas or other combustible gases to generate heat to generate electricity. Since gas turbines entered the stage of power generation industry in the 1950s, gas-fired thermal power plants have achieved tremendous development worldwide and accumulated valuable experience by virtue of their advantages of high power generation efficiency and high thermal efficiency. Among them, the experience of European and American countries shows that it is necessary to install a gas turbine generator set with a power share of 8% to 10% in the power grid in view of the requirements of safety and peak regulation. The experience of our country also shows that the peak-to-valley difference of power grids in many areas of our countr...
Claims
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Application Information
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