Heat storage type incinerating method for treating Dioxin-like compounds

Abstract

The heat storing incineration method for treating Dioxin compounds includes one pre-treatment step, one Dioxin decomposing step and one heat storing ready step. The waste gas flow is first led to the first pre-heated heat accumulating material to decompose the Dioxin compounds in the waste gas flow at high temperature and convert the waste gas flow into high temperature clean gas flow. The clean gas flow is then made to pass through the second heat accumulating material, so that the second heat accumulating material absorbs the heat the clean gas flow carries for subsequent use and the clean gas flow is cooled before exhaust. Owing to the excellent heat accumulating capacity and heat conducting capacity of the first and the second heat accumulating material, the present invention has high heat recovering rate, effective elimination of Dioxin compounds and low cost.

Description

【Technical field】 [0001] The invention relates to an incineration method for processing dioxin compounds, in particular to a heat storage incineration method for processing dioxin compounds. 【Background technique】 [0002] Many literature reports have clearly pointed out that dioxins are a serious threat to public health, and it has also been confirmed that long-term exposure to dioxins is likely to cause reproductive harm such as liver toxicity, cancer, miscarriage, and birth defects , and damage the nerve, endocrine, immune system and so on. Apparently, dioxin is indeed one of the most toxic compounds known. For example, sintering furnaces, electric arc furnaces, secondary aluminum (copper) refineries, crematoriums, urban waste incinerators, medical waste incinerators, small and medium-sized waste incinerators, diesel vehicles, automobiles, and locomotives in the steelmaking industry are all Emission sources of dioxins, especially incinerators are the main emission sourc...

AI Technical Summary

Problems solved by technology

[0008] (2) Activated carbon cannot be reused, which increases the operating cost of the incinerator

[0009] (3) After the activated carbon is sprayed, it becomes part of the fly ash. These fly ash contain dioxin and heavy metals (especially mercury) and are hazardous industrial waste, which need to be solidified to prevent the dissolution of toxic substances such as dioxin , relatively increasing the follow-up processing cost

[0010] (4) Generally speaking, equipment such as washing towers or packing towers are installed at the outlet of the incinerator chamber in practice to remove acid gas and dust, and reduce the temperature of the air flow, because the air flow through the washing tower or packing tower contains high water content part, the adsorption efficiency of activated carbon to dioxin is reduced

Furthermore, although this technical method can react and decompose dioxin, the SCR catalyst will face activity decline after two years of use and must be replaced. Due to the high price of the catalyst and the high energy demand, the overall operating cost will increase significantly; moreover, if Improper operation will cause a large amount of dioxin to be synthesized, resulting in serious adverse effects. Therefore, catalytic decomposition technology is rarely used in dioxin treatment practice

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