Recently, the "multi-pollutant collaborative emission reduction technology at the source of incineration flue gas" developed by the research team of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, was successfully applied to Changning County, Baoshan City, Yunnan Province, which is constructed and operated by Guizhou Qingfeng Environmental Protection Technology (Group) Co., Ltd. The 120t/d domestic waste incineration facility achieves ultra-low emissions while incinerating flue gas sulfur dioxide, nitrogen oxides, dioxins and other pollutants. Up to now, the domestic waste incineration facility has been operating stably for 5 months. The online monitoring data of flue gas pollutant emissions are uploaded to the Yunnan Provincial Key Pollution Source Automatic Monitoring Center in real time, and it has passed the environmental protection acceptance of the Yunnan Provincial Department of Ecology and Environment.
"Multi-pollutant collaborative emission reduction technology at the source of incineration flue gas" is a technology that sequentially removes sulfur dioxide and hydrogen chloride in high-temperature flue gas and collaboratively blocks the generation of dioxin. The team applied this technology to small domestic waste incineration facilities in Changning County, Yunnan Province. By optimizing the furnace structure and incineration process, building a high-temperature reaction tower and spraying high-temperature flue gas purifiers, the team achieved the reduction of small molecule gaseous pollutants in the incineration flue gas at 500 to 1000°C. The efficient removal in the cooling stage simultaneously blocks the gas phase homogeneous formation and catalytic formation of dioxin pollutants. The emission concentrations of major air pollutants from this facility are significantly lower than the limit requirements stipulated in current national standards. Among them, the sulfur dioxide emission concentration and the nitrogen oxide emission concentration under good conditions have reached the ultra-low emission standard limits specified by the coal-fired power generation industry.
This technology can not only shorten the process of flue gas purification treatment, save the cost of flue gas purification equipment construction, and make the system run more stably, but also save about 50% of environmental protection consumables and reduce the yield of fly ash by more than 20%. The implementation of this technology also solves the two major technical problems of unstable operation of small-scale domestic waste incineration facilities and difficulty in meeting emission standards, laying a technical foundation for the rapid and large-scale promotion of small-scale waste incineration facilities in county areas.
