A solar-assisted reheating heat recovery thermal power generation system and method for reducing emission and expanding capacity

Abstract

The invention discloses a solar energy assisted reheat heat recovery thermal power generation system. Boiler, steam turbine, condenser, main circulation pump, recuperation heater and boiler are connected in sequence to form the main circulation circuit; the concentrating mirror field focuses sunlight on the solar heat absorber; solar heat absorber, solar high temperature reheater, solar The heat recovery reheater, secondary circulation pump, and solar heat absorber are connected in sequence to form a secondary cycle solar heating circuit; the inlet of the low-pressure cylinder of the steam turbine is connected in sequence with the high-temperature solar reheater and the outlet of the high-pressure cylinder of the steam turbine to form a reheat circuit; the low-pressure cylinder of the steam turbine The regenerative steam extraction port is sequentially connected with the solar regenerative reheater and the regenerative heater; the steam turbine is connected with the generator. The present invention utilizes the secondary cycle of solar energy to realize the purpose of reducing coal consumption and increasing the total power of the system by increasing the reheating surface and regenerative reheating. Based on the full use of solar energy, the original system can operate independently, realizing the function of using solar heat storage to meet the peak and valley energy supply of the regulation system.

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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