Waste incineration flue gas purifying system and process

Abstract

The invention discloses a waste incineration flue gas purifying system and a waste incineration flue gas purifying process. The waste incineration flue gas purifying system comprises a semi-dry type adsorption tower, a lime slurry preparation system, an active carbon injection system and a bag type dust remover, wherein a rotary sprayer is connected with the lime slurry preparation system; the rotary sprayer is arranged at the top end of the semi-dry type adsorption tower; an exhaustion port of the semi-dry type absorption tower is formed in the bottom end of the semi-dry type adsorption tower; a gas inlet of a flue gas pipeline is connected with the semi-dry type adsorption tower; the active carbon injection system is arranged on a flue gas pipeline arranged between the semi-dry type adsorption tower and the bag type dust remover; the bag type dust remover is connected with a gas outlet of the flue gas pipeline; a filter medium adopted in the bag type dust remover is a dust-removing bag; an exhaustion port of the bag type dust remover is formed in the bottom end of the dust-removing bag; a centrifugal air blower and a chimney are arranged at an air outlet. According to the purifying system and the purifying process disclosed by the invention, wastewater is not generated, the water consumption amount is less than that of a wet-type washing tower, the process is simple, and the investment and operation cost is relatively lower.

Description

technical field [0001] The invention relates to a purification system and process, in particular to a garbage incineration flue gas purification system and process. Background technique [0002] The flue gas produced by incineration of garbage mainly includes: 1. Acid gases (HCl, HF, SOx, etc.), dust (particulate matter), heavy metals (Hg, Pb, Cr, etc.) and highly toxic organic pollutants (dioxins, furans, etc.) ); HCl and HF are mainly produced during the incineration of chlorine-containing plastics, resins and other organic matter in garbage; SO x It is mainly produced by the sulfur compounds contained in the garbage during the incineration process, among which SO 2 Mainly, under the catalysis of heavy metals, a small amount of SO will be generated 3 . 2. The dust is mainly composed of inorganic components in the incineration products, with a particle size range of ≤200μm, usually at the outlet of the waste heat boiler. 3. Heavy metals include Hg, Cd, Pb, As, etc., whi...

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Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art with complex process, many supporting equipment, high one-time investment and operating costs, and low processing efficiency, the present invention provides a new waste incineration flue gas purification system and process

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