Влияние компонентного состава суспензионного топлива на основе отходов углеобогащения на временные и экологические характеристики горения

Abstract

In this paper, we justify the implementation of the strategy for combined industrial and municipal waste recovery by burning it as part of composite liquid fuels. To this end, we conducted an experimental research into the ignition and combustion of 2-mm single droplets of composite liquid fuels based on wet coal processing waste with typical municipal solid waste components (wood, rubber, plastic, cardboard) and used turbine oil, added as combustible components. We have established guaranteed ignition delay time values for three various groups of fuel compositions in a motionless air medium at 600-1000 °С. The minimum values of the gas-phase ignition delay times are 3 s, the maximum ones are 25 s. Temperature changes in a fuel droplet during combustion were measured using thermocouples. Maximum temperatures reach 1300 °C for compositions with 10% of used oil. The combustion temperatures of fuel compositions without oil are 200- 300 °С lower. The main anthropogenic emission concentrations (carbon, nitrogen, and sulfur oxides) in flue gases do not exceed those from dry coal combustion. Adding used oils to composite fuels reduces dioxin and furan concentrations in flue gases when municipal solid waste in the fuel burns out due to high combustion temperatures, on the one hand, and increases the concentration of the main anthropogenic emissions, on the other hand. However, this deterioration of environmental performance remains within the allowable emission rate limits for power plants burning solid fuels.