Waste incineration system

Abstract

The invention provides a waste incineration system. The waste incineration system comprises: an incinerator; a flue gas treatment system, which is used for purifying flue gas generated by incinerationin the incinerator to obtain dischargeable flue gas; and a flue gas recirculation system, which is used for introducing the dischargeable flue gas into the incinerator; wherein the flue gas treatmentsystem comprises an active carbon injection device, a dry deacidification device, a dust remover, a wet deacidification device and an SCR denitration device which are successively arranged along theflowing direction of the flue gas. According to the waste incineration system provided by the invention, the dischargeable flue gas undergone purification treatment of the flue gas treatment system isintroduced into the incinerator through arrangement of the flue gas recirculation system, so the oxygen content and temperature of the interior of the incineration chamber of the incinerator are adjusted, and the flue gas temperature of the outlet of the incinerator is reduced; thus, the thermal efficiency of the incinerator is significantly improved; the generating capacity of power is increased; meanwhile, process steps and process chain length in the purification process of the flue gas are significantly reduced; and equipment investment cost and operation cost are decreased.

Description

technical field [0001] The invention relates to the field of waste incineration treatment, in particular to a waste incineration system. Background technique [0002] With the continuous expansion of the number and scale of cities, the requirements for urban waste disposal are getting higher and higher. As an economical and efficient waste disposal solution, waste incineration has the characteristics of harmlessness, volume reduction, and resource utilization. It has been widely developed in China in recent years. After garbage incineration, the pollutants are mainly concentrated in the flue gas emission, which contains dust, SO 2 , HCl, NO x , heavy metals, dioxins and other pollutants will cause great pollution to the environment and must be purified and discharged after reaching the standard. [0003] The conventional flue gas purification system used in traditional waste incineration power plants is composed of the process system of "SNCR+semi-dry method+dry method+ac...

AI Technical Summary

Problems solved by technology

However, due to the composition characteristics of waste incineration flue gas, the increase in the process chain such as SCR denitrification and wet deacidification processes will eventually bring about the disadvantages of high cost of the process chain and a substantial increase in investment and operation costs.

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