A heat supply system that flexibly regulates the steam inlet of the steam turbine in a coal-fired heat-supply power plant

A technology for heating power plants and heating systems, applied in heating systems, hot water central heating systems, household heating, etc., can solve problems such as mutual constraints of heat and electricity loads, achieve flexible switching, realize thermoelectric decoupling, and apply wide range of effects

Active Publication Date: 2021-06-08
TAIYUAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0003] The main technical problem to be solved by the present invention is to provide a heat supply system that flexibly regulates the steam intake of the steam turbine in a coal-fired heat supply power plant, solve the problem of mutual restriction of heat and electricity loads caused by changes in heat supply loads, and realize thermoelectric decoupling

Method used

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  • A heat supply system that flexibly regulates the steam inlet of the steam turbine in a coal-fired heat-supply power plant

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specific Embodiment approach

[0027] Such as figure 1 Shown, the specific embodiment of the present invention is as follows:

[0028]The present invention includes economizer 1, superheater 2, reheater 3, first decompression humidifier 4, first solenoid valve 5, high pressure cylinder 6, fourth solenoid valve 7, second decompression humidifier 8, first Second solenoid valve 9, fifth solenoid valve 10, medium pressure cylinder 11, butterfly valve 12, low pressure cylinder 13, generator 14, condenser 15, condensate pump 16, fourth stop valve 17, third stop valve 18, third solenoid valve Valve 19, third surface heat exchanger 20, second stop valve 21, second surface heat exchanger 22, first stop valve 23, first surface heat exchanger 24, heat network heat exchanger 27, supply Water pump 28, circulating water pump 29, deaerator 30, and other equipment. The outlet of the superheater 2 is connected to the inlet of the first decompression humidifier 4, the outlet of the first decompression humidifier 4 is conne...

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Abstract

The invention belongs to the field of cogeneration of heat and power, and specifically discloses a heat supply system for flexibly regulating the steam intake of a steam turbine in a coal-fired heat supply power plant. Heat exchange with the water supply of the primary pipe network, the second heat supply method is to exchange heat with the water supply of the primary pipe network through the main steam, reheat steam and medium pressure cylinder exhaust steam, and the third heat supply method is through the main steam And the reheated steam exchanges heat with the feed water of the primary pipe network. Various heating modes can be switched flexibly to ensure that the system meets the heating demand in the most economical mode of operation; it can effectively solve the problem of mutual constraints between thermal and electrical loads in coal-fired thermal power plants, and realize thermoelectric decoupling.

Description

technical field [0001] The invention belongs to the field of cogeneration of heat and power, and in particular relates to a heat supply system for flexibly regulating the steam intake of a steam turbine in a coal-fired heat supply power plant. Background technique [0002] Coal-fired heating power plants that implement combined heat and power generation can effectively save energy and improve the thermal economy of heating power plants, and play an important role in the field of central heating in northern cities in my country. The conventional heat supply method of coal-fired thermal power plants mainly heats the circulating water of the heating network by extracting the exhaust steam from the medium-pressure cylinder of the steam turbine. In the traditional production mode of "heating electricity", the heat load and the electricity load are coupled. Under the current situation of weak electricity load demand, heating power plants often experience the phenomenon of "heat s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K11/02F01K13/02F01D15/10F24D3/10F24D19/10
Inventor 马红和李军周璐马素霞
Owner TAIYUAN UNIV OF TECH
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