Solar energy auxiliary re-heat and back-heat thermal power generation system and emission reduction and dilatation method

Abstract

The invention discloses a solar energy auxiliary re-heat and back-heat thermal power generation system. A boiler is sequentially connected with a stream turbine, a condenser, a main circulation pump, a bleeder heater to form a main circulation circuit; a condenser mirror field focuses the sun light to a solar energy heat absorber; the solar energy heat absorber, a solar energy high temperature re-heater, a solar energy back-heat re-heater, a secondary circulation pump, the solar energy heat absorber are sequentially connected with to form a secondary circulation circuit; the inlet of a low pressure cylinder of the stream turbine is sequentially connected with the solar energy high temperature re-heater and the outlet of a high pressure cylinder of the stream turbine to form a re-heat circuit; a re-heat extraction opening of the low pressure cylinder of the stream turbine is sequentially connected with the solar energy back-heat re-heater, the bleeder heater; the stream turbine is connected with an electric generator. According to the solar energy auxiliary re-heat and back-heat thermal power generation system and an emission reduction and dilatation method, by the adoption of solar energy secondary circulation, the goal of reducing coal consumption and improving system total power is realized through increasing re-heat field and back-heat re-heat. On a basis of taking full advantage of the solar energy, the original system can automatically operate and the function of utilizing the solar energy thermal storage to meet the supply energy demand of adjusting peaks and valleys of the system is achieved.

Description

technical field [0001] The invention relates to a thermal power generation system and solar energy technology, in particular to a solar-assisted reheating heat generation system and a method for reducing emission and expanding capacity. Background technique [0002] In my country's energy structure, thermal power accounts for more than 70% of the installed capacity of electricity, and coal-fired units are the main thermal power generation units. In recent years, coal-fired power plant boilers have developed rapidly in the direction of large capacity and high parameters, and both manufacturing and operation management have approached the advanced level abroad; while coal-fired industrial boilers have a large number of reserves, wide distribution, high energy consumption, heavy pollution, and energy efficiency. Compared with foreign countries, there is a certain gap in the overall level of pollution control, and the potential for energy saving and emission reduction is huge. ...

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Problems solved by technology

[0006] Secondly, at present, the capacity of most coal-fired industrial boilers in my country is relatively small. Equipped with effective dust removal devices, there are basically no desulfurization and denitrification facilities, and the emission exceeds the standard seriously. The pollution emission problem needs to be solved urgently

[0007] Finally, since coal is a full-carbon-based fossil fuel, existing technical ideas still cannot achieve CO 2 Effective reduction of emissions

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