Sustainable Mining and Metallurgy

In this paper, domestic waste and medical waste after high-temperature cooking treatment in a city were taken as the research objects. By comparing and analyzing the physical and chemical properties, incineration technical indicators, incineration flue gas emission standard limits of the two, and conducting a mixed combustion test of domestic waste and medical waste at a ratio of 1∶50, the feasibility and impact of co-firing medical waste in domestic waste were discussed. The analysis results show that there are some differences in the components and incineration technical standards of domestic waste and medical waste, mainly because the components of domestic waste and medical waste are different, but the requirements of the two in flue gas purification treatment system, slag disposal and thermal energy utilization are basically the same. The contents of SO₂, NO_x, HCl and dioxins in flue gas emissions increased after co-combustion, but they were still controlled within the national standard. Co-firing has no obvious effect on the content of CO and particulate matter in flue gas. The consumption of lime and urea in the flue gas purification system increased after co-firing The above results verify the feasibility of co-combustion medical waste in domestic waste.