The waste gas discharged from the waste incineration power plant mainly comes from the flue gas generated during the incineration process. The combined process of "denitration + (semi dry + dry) deacidification + activated carbon adsorption of heavy metals and dioxin + bag dust collector" is adopted to treat the pollutants such as dust, nitrogen oxides, acid gas, heavy metals and dioxin in in the flue gas, Make the flue gas meet or better than the EU 2010 emission standard and be discharged through the chimney.
The slag is mainly the residue after domestic waste incineration. Its production depends on the composition of waste. Its main components are manganese oxide, silicon dioxide, calcium oxide, aluminum oxide, iron oxide, waste metal, and a small amount of unburned organic matter. The slag generated from waste incineration can be comprehensively utilized after high-temperature harmless treatment and separation of waste steel and other waste metals through magnetic separation, such as cushion for road paving, covering materials for landfill and production of unburned bricks. The part that cannot be comprehensively utilized can be sent to sanitary landfill for landfill.
Fly ash belongs to hazardous waste and must be collected separately. It shall not be mixed with domestic waste, incineration residue, or other hazardous waste. Waste incineration fly ash shall not be stored in the plant for a long time, shall not be disposed of simply, and shall not be transported and discharged at will. The waste incineration fly ash must be subject to necessary stabilization and solidification treatment in the plant area. After stabilization and solidification treatment and passing the leaching toxicity test, it can be sent to the safe landfill or sanitary landfill by special closed means of transportation. When conditions permit, other treatment methods meeting the standard requirements can also be adopted.
After domestic garbage is stacked in the garbage bin, leachate will continuously seep out. Leachate belongs to high concentration organic wastewater, which needs special multi-channel purification process to meet the discharge standard. At the same time of the construction of the domestic waste incineration power plant project, the equipment and facilities of the leachate treatment system shall be built. The treatment process of "physicochemical pretreatment + UASB anaerobic reactor + MBR biochemical treatment + nanofiltration membrane system (NF) + reverse osmosis system (RO)" shall be adopted. The effluent meets the class a standard. All plants are used as power generation make-up water for reuse, realizing zero discharge and no pollution to the surrounding water bodies.