The co-combustion and pollutant emission characteristics of the three kinds of waste ion exchange resins and coal

Abstract

AbstractThe co-combustion of waste ion exchange resin (WIER) and coal in a coal-fired incineration plant is an economical and feasible treatment method. The effects of the amount of WIER on the co-combustion and pollutant emission characteristics are investigated in a thermogravimetric infrared analyzer and tube furnace respectively. Results show that the weight loss rate of WIER combustion is significantly higher than that of coal within 400 °C, and the ignition temperature of the mixture improves with the increased addition of WIERs. The release of sulfur dioxide during the combustion of waste anionic exchange resin (WAER) and waste cationic exchange resin (WCER) mainly occurs at 320–440 °C. The highest concentration of HCl in the combustion of waste mixed exchange resin (WMER) is mainly released at approximately 350 °C. However, the addition of WIERs causes a sharp decrease in the emission of NOx. Moreover, the sulfur and chlorine in the WIERs are respectively released in gaseous forms of SO2 and HCl and do not exist in the fly ash as salt compounds.