Industrial tests of co-combustion of alternative fuel with hard coal in a stoker boiler

J Air Waste Manag Assoc. 2020 Oct 19. doi: 10.1080/10962247.2020.1826007. Online ahead of print.

Abstract

This paper presents the results of industrial research on co-combustion of solid recovered fuel (SRF) with hard coal in a stoker boiler type WR-25. The share of SRF in the fuel mixture was 10%. During the co-combustion of SRF, no technological disturbances of the boiler were noted. The obtained SO2 and NOX emissions were comparable with coal combustion, but dust emissions increased. During the co-combustion of the coal mixture with 10% of alternative fuel, acceptable standards for co-incineration of waste were exceeded for the following: NOx, dust, CO, HCl, HF, heavy metals, dioxins, and furans. The by-products of waste co-combustion with coal were non-hazardous waste. The obtained results constitute a very important contribution to the process of boiler retrofitting towards a waste co-incineration unit, and to meeting the legislative and environmental requirements.

Keywords: Alternative fuel; Co-incineration; Combustion; Emissions; Stoker boiler.