Heating system modifying method for realizing combination of heat and power by straight condensing unit

A pure condensing unit, combined electricity and heat technology, applied in the energy industry, mechanical equipment, steam engine installations and other directions, can solve the problems of large coal consumption, poor environmental protection, low efficiency, etc., to achieve stable and reliable operation, improve economic benefits, environmental protection and energy saving. The effect of social benefit

Inactive Publication Date: 2012-06-20
南京苏夏设计集团股份有限公司
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Problems solved by technology

[0002] At present, under the circumstances that the coal price keeps rising and the country has not adjusted the on-grid electricity price, the economic benefits of power plant enterprises have dropped significantly. Cogeneration of heat and power has been introduced, and small boilers and small thermal power plants with high coal consumption, low efficiency, and poor environmental protection have been shut down in a planned manner. For

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  • Heating system modifying method for realizing combination of heat and power by straight condensing unit
  • Heating system modifying method for realizing combination of heat and power by straight condensing unit

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specific Embodiment approach 1

[0023] Specific implementation plan one, as follows:

[0024] The power plant now has four 300MW intermediate reheating pure condensing turbogenerator sets. Through transformation, the power plant can supply heat to users in the residential area with a relatively short distance. According to the requirements and the steam parameters of the mid-row extraction steam coming out of the connecting pipe, choose to use the pressure matcher to increase the steam pressure.

[0025] As shown in the figure, the pure condensing turbogenerator set is provided with a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder. The steam exhaust port of the boiler is connected to the steam inlet of the high-pressure cylinder through the steam chamber, and the steam exhaust outlet of the high-pressure cylinder is connected to the boiler. Reheating is carried out, and the reheated high-temperature steam is connected to the medium-pressure cylinder through pipelines, the exha...

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Abstract

The invention discloses a heating system modifying method for realizing combination of heat and power by a straight condensing unit. The heat system modifying method is characterized by comprising two implementation manners, consisting of an intermediate exhaust steam extraction manner and a high exhaust steam extraction manner, wherein the implementation manners comprise the following steps of: (1) the intermediate exhaust steam extraction manner: perforating a communication pipe of a turbine for communicating an intermediate-pressure cylinder with a low-pressure cylinder so as to be connected with a heating steam extraction pipe, and arranging a heating steam extraction pipe network to be connected to heat-supplied users; and (2) the high exhaust steam extraction manner: perforating a cold-section pipe in the front of an inlet of a reheater so as to be connected with the heating steam extraction pipe, or perforating a hot-section pipe at the back of an outlet of the reheater so as to be connected with the heating steam extraction pipe by taking exhausted steam of a high-pressure cylinder of the turbine as a heating source, and arranging a heating steam extraction network to be connected to the heat-supplied users, wherein the heating steam extraction pipe is provided with a steam extraction pressure regulating valve, a safety valve and a check valve. The invention provides a method for modifying a generator unit to be a heat and power combined device; and heat is supplied for the users by utilizing steam of a turboset and the advantages of environment friendliness, energy conservation and good economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of power generation, in particular to a transformation method for transforming a generating set into an electric-heat cogeneration equipment. Background technique [0002] At present, under the circumstances that the coal price keeps rising and the country has not adjusted the on-grid electricity price, the economic benefits of power plant enterprises have dropped significantly. Cogeneration of heat and power has been introduced, and small boilers and small thermal power plants with high coal consumption, low efficiency, and poor environmental protection have been shut down in a planned manner. For some medium-sized generating units, such as 300MW pure condensing units, compared with small generating units, the unit efficiency is relatively low. It is equipped with a high-efficiency flue gas dust removal and desulfurization device. The coal consumption of the machine furnace and the steam consumption of the ...

Claims

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Application Information

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IPC IPC(8): F01K17/02
CPCY02E20/14Y02P80/15
Inventor 王国兴葛建中丁巧芬朱志华
Owner 南京苏夏设计集团股份有限公司
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