Feasibility analysis on the coupling power system of municipal solid waste incinerator and coal-fired unit

Abstract

In this paper, the coupling capacity matching is related to chlorine content in MSW incinerator, denitrification and desulfurization efficiency of coal-fired boiler. Based on an 850 t/d municipal solid waste (MSW) incinerator and a 1000MW ultra-supercritical coal-fired unit, the effect of the dual-chain coupling of steam and flue gas on the coal-fired unit is studied, including corrosion of heating surface in furnace, dioxin emissions, pollutants emission, and fly ash comprehensive utilization. Through the influence research to the coal-fired boiler, it can be seen that influence on the heating surface is small at high temperature. The flue gas environment of coal-fired boiler can also inhibit the synthesis of dioxin and the flue gas of waste incinerator meet to the ultra-low emission standard of pollutants of coal-fired units and the heavy metals content of fly ash of coal-fired boiler is not hazardous waste. After the coupling, the generation efficiency of MSW incinerator can rise up from 20% to 31.6% and the MSW incinerators operate investment reduced by 40% with significant economic benefits. The coupling mode can be generalized of waste incinerator and coal-fired boiler that obtain feasibility for engineering application.