Household garbage incineration fly ash grading treatment system

Abstract

The invention discloses a household garbage incineration fly ash grading treatment system which comprises a first-stage bag-type dust collector, an SDA deacidification system, a second-stage bag-typedust collector, an SCR denitration system, a chimney, a fly ash chelating and curing system and a byproduct comprehensive utilization system. Waste incineration flue gas sequentially passes through the first-stage bag-type dust collector, the SDA deacidification system, the second-stage bag-type dust collector and the SCR denitration system and is finally discharged through the chimney; activatedcarbon is sprayed into a connecting pipeline before the waste incineration flue gas enters the first-stage bag-type dust collector; the fly ash filtered by the first-stage bag-type dust collector enters the fly ash chelating and curing system; in the actual production process, the flue gas firstly reacts with the activated carbon to remove dioxin contained in the flue gas, then the flue gas is further purified by a dust collection device, a deacidification device and a denitration device, and finally the flue gas is discharged after reaching the standard through the chimney. One part of the filtered fly ash can be intensively treated through the chelating and curing system, and the other part of the fly ash can pass through a treatment system, so that the comprehensive utilization of byproducts is realized, and the fly ash treatment cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of garbage incineration, in particular to a domestic garbage incineration fly ash classification treatment system. Background technique [0002] In recent years, domestic waste incineration technology has developed rapidly, and this technology has now become the leading technology for urban domestic waste treatment in my country. The so-called domestic waste incineration technology is to process domestic waste through intense high-temperature thermochemical reaction process, but the flue gas produced by high-temperature incineration will have a serious impact on the environment, so the treatment of incineration flue gas has attracted the attention of the society and the public. The "Pollution Control Standards for Domestic Waste Incineration" (GB18485-2014) sets limits on the emission of dust, acid gases, and nitrogen oxides in the incineration flue gas, and requires that the fly ash of domestic waste incine...

AI Technical Summary

Problems solved by technology

The cost of fly ash disposal is high, and the comprehensive utilization rate is low, which greatly increases the difficulty of fly ash disposal

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