Solar auxiliary coal-fired power generation system with compound heat collecting mode

Abstract

The invention belongs to the technical field of solar power generation, and in particular, relates to a solar auxiliary coal-fired power generation system with a compound heat collecting mode. The system is characterized by adopting a mode of connecting compound solar energy into a coal-fired unit; tank type solar energy is connected to one part of high-voltage heaters in parallel; tower type solar energy heats one part of high-temperature steam extracted behind a platen superheater; a tower type solar heat collector absorbs heat for generating electricity through work; cold smoke is extracted between a coal economizer and denitration equipment by a recirculating fan, and is injected in the top of a boiler hearth for mixing with high-temperature smoke; the tank type solar energy and the high-voltage heaters are arranged side by side to replace one part of heat sources of a heat return system to cause the flow increment of reheated steam; the tower type solar energy can replace superheated steam of a boiler to reduce the flow of reheated steam; and the two replacing modes can mutually counteract one part of influence effects on the flow of the reheated steam, so that the safety of a heated surface of the boiler is facilitated. The system largely reduces the whole power supply and coal consumption of the unit through gradient utilization of solar resources.

Description

technical field [0001] The invention belongs to the technical field of solar power generation, in particular to a solar-assisted coal-fired power generation system in a composite heat collection mode. Background technique [0002] Although my country's energy structure adjustment is gradually advancing and gradually reducing its dependence on fossil fuels, the fact that coal-fired power generation accounts for a large proportion of the power generation structure is difficult to change in the short term. With the improvement of technology level, the potential of traditional energy-saving transformation for thermal power unit emission reduction is decreasing, and the cascade comprehensive utilization of different types of energy has become a new measure to reduce coal consumption of coal-fired units. The trough solar thermal power generation technology using solar energy at medium and low temperatures is relatively mature and has been put into commercial operation for many yea...

AI Technical Summary

Problems solved by technology

Tower-type solar energy and coal-fired complementary power generation can effectively improve the utilization of solar energy resources; however, after the tower-type solar boiler panel superheater is drawn out, it is easy to cause the problem of reduced reheating steam flow

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