Method for recycling treatment and denitration of municipal domestic garbage with dry rotary kiln

Abstract

A method for recycling treatment and denitration of municipal domestic garbage with a dry rotary kiln comprises the following steps of pretreating and dividing the municipal domestic garbage into a combustible component material mainly comprising organic matters, and a residue component material mainly comprising inorganic matters, taking the combustible component material as fuel for a decomposing furnace of the dry rotary kiln to substitute fire coal and a hydrocarbon raw material for denitration, feeding the combustible component material to a space from the lower part to the middle upper part in the decomposing furnace with a feed device for treatment and denitration, and taking the residue component material subjected to chemical analysis as an alternative raw material for a batching flour mill of a raw material vertical mill system, wherein the combustible component material is in a bulk form, and is less than or equal to 200mm in side length and less than or equal to 30% in water content. With the adoption of the method for treating the municipal domestic garbage, the operation is simple, the coal consumption is low, the kiln performance stability is good, the combustion of pulverized coal in a production kiln and the furnace of the dry rotary kiln is unaffected, the treatment cost is low, and the pollution to the environmental is low.

Description

technical field [0001] The invention relates to a method for treating urban household garbage, in particular to a method for treating urban household garbage with a dry-process rotary kiln that takes denitrification into consideration. Background technique [0002] With the development of urbanization, the amount of domestic waste in cities and towns in my country has increased at a rate of more than 9%, and the per capita daily domestic waste is about 1.10kg. [0003] The components of urban domestic waste can be simply divided into two major components: inorganic matter and organic matter. The chemical composition of inorganic matter is mainly silicon dioxide, aluminum oxide, ferric oxide, calcium oxide, magnesium oxide, etc. It is combustible, but it can still be used effectively; the organic components are mainly animal and plant residues and plastics, etc., and the basic chemical components are hydrocarbons and nitrogen-containing organic substances, which are available...

AI Technical Summary

Problems solved by technology

[0012] At present, there are still the following disadvantages in the technology of using cement kiln to process domestic waste at home and abroad: first, the investment is too large, and the actual investment of a system with a daily processing capacity of only about 300 tons is more than 100 million yuan; second, the operating cost is relatively high

But at present, there is no suitable, cheap hydrogen or hydrocarbons, or substances that can generate hydrogen and hydrocarbons, which can be added to the dry rotary kiln system in a suitable place and in a suitable way to achieve the purpose of denitrification