Waste incineration flue gas purifying treatment system

Abstract

The invention provides a waste incineration flue gas purifying treatment system. The waste incineration flue gas purifying treatment system comprises SNCR denitration, semi-dry-process deacidification, dry-process deacidification and cooling, activated carbon adsorption, cloth bag dust removal, steam heating, low-temperature SCR denitration, flue gas heat exchange, wet-process deacidification and flue gas white mist removal which are sequentially implemented, wherein the SNCR denitration is performed in an SNCR device, the semi-dry-process deacidification is performed in a semi-dry-process reaction tower, the dry-process deacidification and cooling are performed in the dry-process deacidification tower, the activated carbon adsorption and the cloth bag dust removal are performed in a cloth bag dust remover, the steam heating is performed in a steam heater arranged between the cloth bag dust remover and a low-temperature SCR device, the low-temperature SCR denitration is performed in the low-temperature SCR device, flue gas heat exchange is performed in a flue gas/flue gas heat exchanger arranged between the low-temperature SCR device and a wet-process scrubbing tower, the wet-process deacidification is performed in the wet-process scrubbing tower, and the flue gas white mist removal is performed in another steam heater. The particulate matter, dioxin, heavy metals and acidic gas in flue gas are removed to the most degree, and the ultra-low emission requirements are met.

Description

technical field [0001] The invention relates to the field of flue gas purification of waste incineration, in particular to a flue gas purification treatment system meeting the ultra-low emission standard of waste incineration. Background technique [0002] In the past 20 years, my country's urbanization process has accelerated, and the number and scale of cities have continued to expand. However, due to the serious lag in environmental protection infrastructure, the pollution of urban ecological environment by urban waste has become increasingly serious. By the end of 2014, my country's municipal solid waste production had reached 178.99 million tons, 176.77 million tons had been cleared and transported, and 166.81 million tons had been processed, an increase of 2.91%, 2.54%, and 3.45% respectively compared with 2013. It is estimated that by 2020, the amount of urban waste generated will reach 323 million tons, and the harmless treatment of waste is imminent. The main way t...

AI Technical Summary

Problems solved by technology

Relying on this process combination, it can meet the national emission standard GB18485-2014, but it is difficult to meet the EU em

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