A waste incineration process

Abstract

The invention relates to a waste incineration treatment process. Firstly, combustion-supporting air is extracted from a waste storage tank, enters an incinerator after passing an air preheater, is mixed with waste and is burnt by a burner at the high temperature, and then, smoke and furnace slag mixed with multiple substances are produced; and the smoke rises and passes a plurality of jet devices on the incinerator, and the jet devices spray reducing agents into the incinerator, so that the reducing agents and nitride in the smoke have a reduction reaction, smoke produced after the reduction reaction is introduced into a cooling reaction tower for cooling treatment, the cooled smoke enters a bag-type dust remover for dust removal, flying ash is settled in the dust removal process, the smoke without dust is introduced into a wet type washing tower for treatment, and finally, the smoke is discharged after dehumidification treatment. The waste incineration treatment process is high in denitration efficiency and can effectively prevent secondary synthesis of dioxin, furnace slag can be recycled, solidification and backfilling treatment of flying ash is safer, and secondary pollution is prevented.

Description

technical field [0001] The invention relates to a garbage treatment process, in particular to a garbage incineration treatment technique. Background technique [0002] With the rapid development of social economy, the urban domestic garbage is also increasing rapidly, and these domestic garbage are gradually polluting the environment. The common disposal methods of domestic waste include landfill and incineration. The existing incineration methods are usually used for waste incineration to generate electricity. However, during the incineration process of waste, a mixture of various compounds, smoke and heavy metals is produced. The main components are: Smoke, fly ash, carbon monoxide, nitrogen oxides, sulfur dioxide, hydrogen chloride, mercury, cadmium, lead, and dioxins, etc. If such smoke is discharged directly or fails to meet the standards, it will directly endanger the environment and human health, and incineration The slag produced later also contains a large amount o...

AI Technical Summary

Problems solved by technology

The common disposal methods of domestic waste include landfill and incineration. The existing incineration methods are usually used for waste incineration to generate electricity. However, during the incineration process of waste, a mixture of various compounds, smoke and heavy metals is produced. The main components are: Smoke, fly ash, carbon monoxide, nitrogen oxides, sulfur dioxide, hydrogen chloride, mercury, cadmium, lead, and dioxins, etc. If such smoke is discharged directly or fails to meet the standards, it will directly endanger the environment and human health, and incineration The slag produced later also contains a large amount of heavy metal substances. The conventional slag treatment method is to transport it to landfill or burn it into ceramic tiles. However, there are a large amount of heavy metals or non-ferrous metals in the slag, and landfill will cause land pollution. , Firing into ceramic tiles will also affect human health; and the treatment methods of fly ash mainly include three methods: cement solidification, melting solidification and chemical agent stabilization. Cement solidification technology has obvious advantages in terms of economy and operability, but cement The high dosage leads to a high volumetric expansion rate of the solidified body. As time goes by, some toxic substances in the solidified body may gradually dissolve, which poses a long-term and potential threat to the environment; the melt solidification technology has a high capacity reduction rate for residues and a good curing effect , but the disadvantage is that some toxic substances will be volatilized, and tail gas treatment measures must be taken, so the system is more complicated and the operating cost is high; the chemical agent stabilization technology has the advantages of simple treatment process and less equipment investment, but it will produce high-concentration inorganic salt wastewater , needs further processing

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