Tower type solar energy-steam combustion gas combined cycle power generation system

Abstract

The invention relates to a tower type solar energy-steam combustion gas combined cycle power generation system, which comprises a solar energy heat absorber, a combustion gas turbine, a residual heat boiler and a steam turbine. The residual heat boiler is connected with the combustion gas turbine; the solar energy heat absorber is connected with a superheater unit of the residual heat boiler; a fume outlet of the combustion gas turbine is communicated with a main flue of a fire hole section of the residual heat boiler; a bypass pipeline is arranged on the main flue; a fume distributing device is arranged on the bypass pipeline; when solar energy reaches a preset value, the fume distributing device closes the bypass pipeline; and when the solar energy does not reach the preset value, the fume distributing device opens the bypass pipeline. By using the tower type solar energy-steam combustion gas combined cycle power generation system, through arranging the bypass pipeline on the main flue and the fume distributing device, the flexible regulation of a superheated steam temperature is realized; the defect that the power generation by using pure solar energy is unstable is overcome; the power generation efficiency and the power generation quality are improved; the consumption of a fuel can be effectively decreased; and the purposes of energy saving and emission reduction are achieved.

Description

field of invention [0001] The invention generally relates to the application field of solar heat, in particular to a tower type solar energy-steam gas combined cycle power generation system. Background technique [0002] The solar thermal power generation system uses a heliostat to reflect sunlight to the receiving surface, and then converts solar radiation energy into thermal energy output by the receiving surface with the help of heat transfer fluids such as water, air, liquid metal or molten salt. Due to the high investment and power generation costs, the pure solar thermal power generation system cannot match the conventional energy power generation in terms of economy, and there are still problems such as discontinuity and instability. Therefore, the hybrid power generation technology of solar energy and conventional power plants has become a new energy utilization field. research hotspot. [0003] The hybrid power generation methods of solar energy and conventiona...

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the prior art and provide a tower solar-steam gas combined cycle power generation system that integrates a tower solar thermal power generation system with a gas-steam power generation system. The problem of temperature control of superheated steam at the same time overcomes the shortcomings of simple solar power generation instability, improves power generation efficiency and quality, and can effectively reduce fuel consumption to achieve the purpose of energy saving and emission reduction

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