Waste incineration flue gas purification method and system

Abstract

The invention discloses a waste incineration flue gas purification method and system. The system comprises a flue gas waste heat recovery and denitration system, a quench tower system, a reaction tower system, a dust remover system, a deacidification system and the like. After the waste incineration flue gas is conveyed to the waste heat recovery and denitration system for flue gas waste heat recovery and denitration, the flue gas is conveyed to the quench tower system for rapid cooling, then conveyed to the reaction tower system for reaction, conveyed to the dust remover system for dust removal, finally conveyed to the deacidification system for deacidification, and discharged after reaching the standard. The waste incineration flue gas purification method and system have the advantages of being good in energy-saving and environment-friendly performance, high in denitration and deacidification efficiency, capable of effectively inhibiting secondary synthesis of dioxin, remarkable in dust removal and heavy metal removal effect and the like. The novel waste incineration flue gas purification method and system are energy-saving and consumption-reducing, easy to operate and good in running economic benefit, the flue gas can be directly discharged, and no pollution is caused to the environment.

Description

technical field [0001] The invention belongs to the technical field of garbage incineration, and in particular relates to a method and system for purifying flue gas of garbage incineration. Background technique [0002] With the acceleration of the urbanization process, the waste accumulation problem of municipal solid waste is becoming more and more serious, and the mainstream method of domestic and foreign disposal of municipal solid waste is incineration. However, waste incineration flue gas contains many harmful substances, including heavy metal elements such as smoke, SOx, NOx, HCl, HF, lead, mercury, and cadmium, and carcinogens such as dioxins and furans. If the waste incineration flue gas is not treated up to the standard before discharge, it will cause serious pollution to the environment. At the same time, my country promulgated and implemented the "National Plan for the Construction of Hazardous Waste and Medical Waste Disposal Facilities" (hereinafter referred t...

AI Technical Summary

Problems solved by technology

[0003] The treatment of flue gas from waste incineration is mainly aimed at heavy metal elements such as smoke, SOx, NOx, HCl, HF, lead, mercury, and cadmium, and carcinogens such as dioxins and furans. Denitrification function, low deacidification efficiency, dioxin and other indicators are easy to exceed the standard, dust removal and heavy metal removal are poor, and the process is complicated.

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