Thermal power plant low-load denitration system based on fused salt energy storage system

Abstract

The invention provides a thermal power plant low-load denitration system based on a fused salt energy storage system. The thermal power plant low-load denitration system is characterized by comprisinga conventional thermal power generation system and a high-pressure steam fused salt energy storage system; an SCR technology is adopted for the conventional thermal power generation system for denitration; high-pressure steam generated by the conventional thermal power generation system is output to the high-pressure steam fused salt energy storage system through a pipeline; the high-pressure steam and the high-pressure steam fused salt energy storage system are subjected to heat exchange to form high-pressure condensed water, and the high-pressure condensed water is sent back to the conventional thermal power generation system through a high-pressure condensed water pipeline; the high-pressure condensed water pipeline communicates with an economizer water side outlet pipeline of the conventional thermal power generation system; and a bypass water supply pipeline of an economizer respectively communicates with the high-pressure condensed water pipeline and a conventional thermal powergeneration system water supply pipeline. According to the thermal power plant low-load denitration system based on the fused salt energy storage system, normal operation of the fused salt energy storage system and the denitration effect during low-load operation of a boiler are guaranteed.

Description

technical field [0001] The invention relates to the field of energy storage technology, in particular to a low-load denitrification system for a thermal power plant based on a molten salt energy storage system. Background technique [0002] In order to promote the grid-connected consumption of new energy power generation in my country, it is required to strengthen the peak-shaving capacity of the power system and comprehensively improve the peak-shaving of the system. One of the means is to increase the transformation of coal-fired power stations for peak-shaving and increase the peak-shaving of coal-fired power stations. Ability. The deep peak regulation of thermal power plants can help ensure the heating of thermal power units in winter, avoid the problem of abandoning wind and light, and enable my country to achieve the goal of adjusting the energy structure. [0003] At the same time, since the promulgation and implementation of the national "Emission Standards of Air Po...

AI Technical Summary

Problems solved by technology

In the situation of deep transformation of thermal power units, ultra-low load (<40% of rated load) operation is required, but when ultra-low load is operated, the minimum load limit is limited by the flue gas temperature, and the flue gas temperature is too low to meet the operation requirements of the SCR catalyst

[0004] Although the current technical solution can achieve the purpose of deep peak regulation, when the unit is in deep peak regulation, the flue gas temperature at the inlet of the SCR denitrification device cannot be guaranteed, and the pollutant discharge standard cannot be met during low-load operation

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