Method for performing pyrolysis uniting building-material utilization to rubbish oversize products

A technology for oversize and garbage, which is applied in the field of pyrolysis and combined building materials utilization for garbage oversize, can solve the problems of inability to continuously feed materials, incomplete utilization, unstable operation, etc., so as to improve incineration performance and prevent odor. The effect of exhausting air and increasing calorific value

Inactive Publication Date: 2012-06-20
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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Problems solved by technology

[0005] The purpose of the present invention is to propose a technical scheme for pyrolyzing and utilizing building materials for garbage sieves to solve the problems of high energy consu

Method used

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  • Method for performing pyrolysis uniting building-material utilization to rubbish oversize products
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  • Method for performing pyrolysis uniting building-material utilization to rubbish oversize products

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Embodiment 1

[0023] An embodiment of a method for pyrolyzing combined building materials utilization for garbage oversize, firstly, the garbage undersize with a particle size of less than 15mm is sent to a garbage composting plant for composting or to a garbage landfill as covering soil, or sent to a cement rotary Cement clinker is obtained by burning in the kiln; for the treatment process sequence of the garbage oversize > 15mm, please refer to figure 1 : Oversize 1→drying 2→screening, crushing, winnowing, mixing 3→extrusion granulation 4→pyrolysis and gasification 5→output recycling 6:

[0024] Drying: use the waste heat 7-1 at the kiln tail of the cement rotary kiln 7 at about 140°C to dry the waste on the sieve for 3-5 hours to reduce the moisture content to 10-15% to obtain dry waste;

[0025] Screening, crushing, winnowing, and mixing: the drum screening 3-1 is used, and the dry garbage is divided into three parts according to the particle size: 60mm, of which: the 60mm garbage, sen...

Embodiment 2

[0031] Referring to embodiment 1, the present embodiment is a further preferred example of the content of embodiment 1, therefore, the method further has, the amount of quicklime added is 8%-12% of the garbage weight, and the added dewatered sewage Mud or coal powder is 20% to 30% of the weight of the garbage.

Embodiment 3

[0033] Referring to embodiment 2, this embodiment is a further preferred example of the content of embodiment 2. Therefore, the method further has, the amount of quicklime added is 10% of the garbage weight, and the dewatered sludge or coal added is Powder is 15% of the weight of the garbage.

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Abstract

The invention discloses a method for performing pyrolysis uniting building-material utilization to rubbish oversize products. First rubbish undersize products with granularity smaller than 15mm are conveyed into a rubbish composting plant to perform composting or conveyed into a refuse landfill to serve as covering soil, and a treatment flow of the rubbish oversize products sequentially comprises drying, screening, crushing, winnowing, mixing, extrusion granulation, pyrolysis gasification and output recycling. Rubbish is processed into a refuse derived fuel (RDF) after waste heat drying at first, and not only are heat value and burning performance improved, but also secondary pollution of percolate, dioxin and the like is avoided. Combustible gas generated by a pyrolysis method enters into a cement kiln to be combusted, part of fuel required for cement clinker production can be replaced, and a stable high-temperature environment in the cement kiln can fully degrade dioxin generated by rubbish incineration. Ash residues serve as different building-material raw materials according to different heterogeneities, waste discharge is avoided, and no influence is caused on building-material production and product quality.

Description

technical field [0001] The invention belongs to the field of solid waste disposal, and in particular relates to a method for pyrolyzing combined building material utilization for waste oversize. Background technique [0002] From 2005 to 2008, the average annual growth rate of domestic waste generation in Beijing was about 8%. In 2009, the daily generation of waste in Beijing was 18,300 tons. It is estimated that by 2015, the generation of domestic waste in Beijing will reach 11.4 million tons. 31,200 tons / day. [0003] According to the difference in the particle size of the garbage, it is an indispensable and important link in the garbage treatment to use sieves of various apertures to sieve the garbage. For example, the Majialou Transfer Station, Xiaowuji Transfer Station, Nangong Composting Plant and other waste treatment facilities in Beijing all have the function of drum screening. After screening, the small particle size part of the waste is sent to the comprehensive ...

Claims

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Application Information

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IPC IPC(8): B09B5/00B09B3/00
Inventor 顾军李春萍芦澍殷杰
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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