Power generation system of solar aided coal-fired power plant

Abstract

A power generation system of a solar aided coal-fired power plant comprises a coal-fired power generation thermodynamic system and a solar heat collection and steam generation system, wherein the solar heat collection and steam generation system comprises a solar receiver which is used for absorbing solar energy, the coal-fired power generation thermodynamic system comprises a boiler, a turbine, a power generator and a condenser, the turbine at least comprises two steam inlets such as a primary steam inlet and a secondary steam inlet, superheated steam produced after the solar heat collection and steam generation system absorbs solar heat can be connected with the primary steam inlet of the turbine through a steam pipeline selectively, and the turbine is driven by the superheated steam and superheated steam produced by the boiler together and power is generated. The heat produced by the solar heat collection system is directly used for driving the turbine, so that the temperature of actual utilization of the solar energy is improved, and the conversion efficiency of solar aided power generation is improved.

Description

technical field [0001] The invention relates to the technical field of solar power generation, in particular to a thermal system for complementary power generation of solar energy and coal, especially a large-scale solar-assisted coal-fired power station power generation system with coal as the main and solar energy as the supplement. Background technique [0002] China's energy structure is dominated by coal, and most of the electricity is provided by coal-fired power generation. Coal-fired power generation accounts for more than 70%. Therefore, using solar power to generate electricity with coal-fired power stations has a broad application base. [0003] Figure 7 Shown is a schematic diagram of the connection structure of a thermal system of a coal-fired power station. The system consists of a boiler 1, a steam turbine 2, a generator 3, a condenser 4, a multi-stage low-pressure heater 6, a deaerator 8, a condensate pump 5, Feed water pump 9, multi-stage high-pressure heat...

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Problems solved by technology

According to the basic principles of thermodynamics, the higher the utilization temperature, the higher the conversion efficiency of heat to electricity, and the higher the energy utilization rate. Therefore, the shortcomings of the existing technology can be mainly attributed to the fact that the actual utilization temperature of solar energy is lower, so that Relatively low conversion efficiency

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