Steam-injection-type solar and thermal power station complementary generating system

Abstract

The invention discloses a steam-injection-type solar and thermal power station complementary generating system. The generating system comprises a first parabolic-trough-type solar collector, a solar steam generator, a diverter, a second parabolic-trough-type solar collector, a solar superheater, a mixer, a solar preheater, a coal burning boiler as well as a high pressure cylinder, an intermediate pressure cylinder and a low pressure steam cylinder of a steam turbine, wherein feedwater passes through the solar preheater, the solar steam generator and the solar superheater, and indirectly absorbs solar energy through conduction oil or enters the solar collectors to absorb the solar energy so as to be converted into superheated steam, and the superheated steam is injected the high pressure cylinder or the intermediate pressure cylinder of the steam turbine; and the superheated steam is mixed with the superheated seam generated by the coal burning boiler in the high pressure cylinder or the intermediate pressure cylinder of the steam turbine, and the mixture expands to do work in the high pressure cylinder or the intermediate pressure cylinder of the steam turbine to output power to a generator so as to carry out electricity generation. The generating system provided by the invention can be used for realizing the dilatation and consumption reduction of a thermal power station and solving the problem of unstable and discontinuous solar energy, thereby being beneficial to the large-sale popularization and application of a solar energy technology.

Description

technical field [0001] The invention relates to the technical field of complementary power generation system and solar energy utilization, in particular to a steam-injection type solar energy and thermal power station complementary power generation system in which superheated steam generated by solar energy is injected into the intermediate stage of a steam turbine for expansion and work. Background technique [0002] my country's coal-fired thermal power plants have mature technology and good economy, and their power generation accounts for more than three-quarters of the country's total power generation. Goals, conventional coal-fired thermal power plants urgently need to find new ways to reduce energy consumption and carbon emissions. [0003] At the same time, in the 21st century, the world's energy will change from fossil energy to a diversified energy structure that is constantly changing such as fossil fuel, nuclear energy, solar energy, and renewable energy. In parti...

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Problems solved by technology

[0006] In view of this, the main purpose of the present invention is to provide a steam-injection solar energy and fossil fuel complementary power generation system to expand the capacity of coal-fired thermal power plants and reduce consumption, solve the problem of unstable and discontinuous solar energy, and facilitate the large-scale promotion of solar energy technology application

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