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

A technology of energy conversion of urban domestic waste, which is applied in the field of energy-based treatment of urban domestic waste with dry-process rotary kilns that take into account denitrification, can solve the problems of large investment, failure to find, and high operating costs, and achieve low investment, reduced coal consumption, and treatment costs. low effect

Active Publication Date: 2013-04-17
长沙紫宸科技开发有限公司
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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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment includes the following steps: first, more than 1,500 tons of urban domestic waste in the yard are pretreated by coarse crushing, fine crushing, and wind separation to obtain 763 tons of residue component material waste mainly composed of inorganic substances, with an average moisture content of 19.6% , and obtained 714 tons of combustible component material garbage mainly composed of organic matter. The combustible component material is a combustible component material in the form of bulk material. The average is 15063KJ / kg; then the residue component material and combustible component material are transported to the Ф3.5×50m dry process rotary kiln plant, and the inorganic residue component material is used as clay substitute raw material for vertical mill batching after chemical analysis , has no adverse effect on the output and fineness of the vertical mill, and the raw meal rate of the mill is stable; the combustible component material mainly composed...

Embodiment 2

[0034] This embodiment comprises the following steps: firstly take about 3,500 tons of urban domestic waste from the storage yard, and after the pretreatment of coarse crushing and fine crushing by a crusher with a screening device, the residue component material waste 1847 mainly composed of inorganic substances is obtained. tons, with an average moisture content of 21.3%, and obtained 1,613 tons of combustible component material waste mainly composed of organic matter, which is in the form of bulk materials, with a side length of 3-93mm, an average moisture content of 18.4%, and an average low calorific value of 16,014KJ / kg on a dry basis ; Then the residue component material and combustible component material are transported to the Ф4×60m dry process rotary kiln plant respectively, and the residue component material mainly composed of inorganic matter is chemically analyzed and used as clay substitute raw material for vertical mill batching, vertical mill The product quality...

Embodiment 3

[0036] This embodiment includes the following steps: first, transport about 5,000 tons of urban domestic garbage to the Ф4.3×64m dry-process rotary kiln factory with a garbage truck with a compression dehydration device, and transfer the sewage in the sewage tank of the garbage truck to the dry-process rotary kiln The sewage tank in the factory is used as a vertical mill to adjust the comprehensive moisture content of raw materials, and then the incoming garbage is pretreated by coarse crushing, fine crushing, and vibration screening to obtain 3,104 tons of combustible component materials mainly composed of organic matter , in the form of bulk material, the side length of the material is 5-98mm, the average moisture is 19.7%, and the average low calorific value of the dry basis is 14786KJ / kg. The obtained residue component material is 1843 tons mainly composed of inorganic substances, with an average moisture content of 23.6%; mainly inorganic substances After chemical analysis...

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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...

Claims

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Application Information

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IPC IPC(8): B09B3/00
Inventor 尹小林
Owner 长沙紫宸科技开发有限公司
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