Thermodynamic system combined with solar energy water heat absorption device and low limit load boiler

Abstract

The invention provides a thermodynamic system combined with a solar energy water heat absorption device and a low limit load boiler. The thermodynamic system combined with the solar energy water heat absorption device and the low limit load boiler mainly comprises the following basic components: heliostats, a solar energy steam pocket, a heat absorber, a heat accumulator, the low limit load boiler, a steam turbine, a power generator, a condenser, a condensate pump, a deaerator, a water supply pump and the like; and the low limit load boiler mainly comprises burners, water cooling walls, an auxiliary steam pocket, an overheater, an air preheater, a coal economizer and the like. With the adoption of the thermodynamic system combined with the solar energy water heat absorption device and the low limit load boiler, the technical difficulty of solar energy high-temperature heat power generation is reduced, the reliability and the utilization rate of the system are promoted, and the application popularization of a solar energy heat power generation technique is facilitated.

Description

technical field [0001] The invention relates to a thermodynamic system combined with a solar water quality heat absorbing device and a low limit load boiler, belonging to the technical field of solar energy utilization. Background technique [0002] Solar high-temperature thermal power generation technology is an important direction for large-scale utilization of solar energy, and it has far-reaching significance for human beings to solve problems such as fossil energy crisis and air pollution. Due to the advantages of high parameters and large capacity of solar tower focused thermal power generation, it has attracted the attention of various countries. There are many kinds of media for solar thermal power generation: water, molten salt, air, liquid metal, organic working fluid, etc. Because molten salt has the characteristics of high heat capacity, wide liquid phase temperature range, good fluidity, and strong heat storage characteristics, it is used Its research as a heat...

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Problems solved by technology

However, the molten salt system also has the characteristics of complex pipelines and high freezing point. Therefore, the molten salt system has strict requirements on pipeline preheating, equipment insulation, operation and maintenance, etc., which limits the development of solar molten salt systems to a certain extent.

The thermal system using water as the heat-absorbing medium has significant advantages such as cheap working fluid, good heat transfer effect, and safe use. However, due to the relatively low heat transfer performance of water vapor, using it as the heat-absorbing medium may also lead to heat absorption. At the same time, due to the poor thermal storage capacity of water vapor, this factor also limits the development of high-temperature solar heat utilization technology using water as the heat-absorbing medium.

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