Method and system for combing solar energy thermal power generation with biomass power generation

Abstract

The invention relates to a method and a system for combining solar energy thermal power generation with biomass power generation. When the method is used for generating electricity in the daytime (a fine day), one path of heat transfer oil heated in a heat collection field passes through a heat exchanger to ensure that counter-flow water is heated up into superheated steam at the temperature of between 360 and 380 DEG C; and the other path of the heat transfer oil heated in the heat collection field passes through the heat exchanger to heat up a fused salt so as to perform energy storage. The water heated in a water cooled wall of a biomass boiler is changed into steam which enters a steam header and a steam-water separator, then is heated to the temperature of between 535 and 545 DDEG C after being sent into a super-heater of the boiler together with the steam at the temperature of between 360 and 380 DEG C, and then is supplied to a steam turbine to drive a generator to finish the power generation process. During receiving electric valley adjustment, the biomass boiler maintains the minimum stable combustion state. The self power generation of the method and the system can be used for supplying electricity to an electric heater in a fused salt heat storage system to heat the fused salt and perform secondary energy storage for a fused salt heat tank. During the night, or when a solar energy condition is not good, the heat energy stored in the fused salt is released by the heat exchanger to generate electricity.

Description

technical field [0001] The invention relates to a power generation method and system, in particular to a method and system combining solar thermal power generation with biomass power generation. Background technique [0002] Solar thermal power generation and biomass power generation are two important renewable energy utilization methods, which are closely watched by energy researchers all over the world. in: [0003] Solar thermal power generation is the use of heat collectors to convert solar radiation energy into heat energy and generate electricity through a thermodynamic cycle process. According to different concentrating methods, solar thermal power generation systems are roughly divided into three categories: trough line focusing system, tower system and dish system. At present, the commercialization of the trough solar thermal power generation system is the most successful, but its concentration ratio is low, and the temperature of the water vapor generated general...

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Problems solved by technology

However, due to the low calorific value of biomass itself, although a single biomass power generation system can guarantee 24-hour power generation, the amount of raw materials used is huge, and there may be some problems in its source and storage area.

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