Experimental system for ultra-low emission research of supercritical CO2 coal-fired boiler

Abstract

The invention discloses an experimental system for ultra-low emission research of a supercritical CO2 coal-fired boiler, and belongs to the technical field of boiler combustion. The experimental system involves a combustion unit, a dust removal and denitration unit, a desulfurization unit and a flue gas circulation unit, wherein the combustion unit adopts pulverized coal as a combustion raw material, air required by combustion is introduced into a furnace body through a primary air pipe, a secondary air pipe and an over-fire air pipe, and meanwhile, part of flue gas generated by combustion of the combustion unit is conveyed into the furnace body through the flue gas circulation unit, so that the combustion environment of the pulverized coal is improved, self-stabilization combustion of the pulverized coal is achieved, and it is guaranteed that the pulverized coal can be fully burnt out; and the flue gas generated by the combustion unit is subjected to dust removal and denitration through the dust removal and denitration unit and then enters the desulfurization unit to be desulfurized, so that the content of pollutants in the flue gas is effectively reduced.

Description

technical field [0001] The present invention relates to supercritical CO 2 Coal-fired boiler (pulverized coal fuel) combustion and pollutant emission and control technology field, more specifically, relate to a kind of supercritical CO 2 Experimental system for ultra-low emission research of coal-fired boilers. Background technique [0002] Due to the special physical properties of supercritical carbon dioxide, it has the advantages of smaller power generation system and floor space compared with water vapor, and because its energy density is higher than that of water, according to the existing high temperature resistance level of steel, the efficiency of supercritical carbon dioxide boiler system higher. Compared with steam boilers, supercritical carbon dioxide boilers have the advantages of compact power generation system, small footprint, water saving, and low corrosion to steel. Therefore, they have received extensive attention from domestic research institutions and h...

AI Technical Summary

Problems solved by technology

[0004] After searching, for example, the invention patent "A Multifunctional Experimental System for Removing Multiple Pollutants" (CN201710288935.8) can simultaneously measure the dust removal efficiency of the electric bag filter, nitrogen oxides, sulfur oxides, and mercury and their compounds. Removal efficiency, however, the flue gas used in this test bench is not direct combustion flue gas, at the same time, the temperature and desulfurization efficiency of the electric bag filter are low, and the denitrification uses an adsorbent, which is quite different from the actual situation; another example is the invention patent "A Simultaneous flue gas desulfurization and denitrification comprehensive experimental device and its operation method" (CN201210115569.3) uses an adsorbent solution to treat SO in a porous spherical reaction bottle 2 , NO X Carry out adsorption desulfurization and denitrification, the process does not involve dust removal, and at the same time the temperature is low, the overall system is quite different from the actual project

Images