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A method for pyrolysis and carbonization of household waste

A technology of pyrolysis and carbonization of domestic waste, which is applied in special forms of dry distillation, petroleum industry, coke oven, etc., can solve the problems of easy production of a large amount of acid gas dioxin, high operating cost, and long composting cycle, etc., to achieve convenient Reduction treatment, achieving high carbon fixation rate, and promoting catalytic effect

Active Publication Date: 2018-06-29
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many problems in the three methods. For example, sanitary landfill has a large area and is easy to pollute soil and water resources; The operation cost is high, and a large amount of acid gas and dioxin are easily produced during the incineration process
However, during the pyrolysis process, a variety of organic substances in garbage can easily form a large amount of volatile organic products, and the carbon fixation rate is low. As a result, the pyrolysis carbonization technology aimed at waste reduction treatment still needs to A large amount of pyrolysis liquid and gaseous by-products are processed, which seriously limits the popularization and application of this technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take by weighing 300g aluminum hydroxide, 6g urea, 90g kaolin and 130g diatomaceous earth and mix uniformly to obtain a carbon-promoting catalyst; then weigh 15kg of original domestic waste (moisture content 30% and ash content 28%) taken from a certain waste treatment plant , mixed evenly with the above-mentioned coke-promoting catalyst, added to the garbage carbonization pyrolysis furnace, and pyrolyzed at 350°C for 2 hours, and the pyrolysis coke was taken out after the pyrolysis furnace was cooled to room temperature.

[0019] After calculation, the yield of solid coke is 75.3% (calculated based on dry waste raw materials), and the volume reduction rate of waste is 78%.

Embodiment 2

[0021] Take by weighing 98g aluminum hydroxide, 4g urea, 22g kaolin and 26g diatomaceous earth and mix uniformly to obtain a carbon-promoting catalyst; then weigh 25kg of original domestic waste (moisture content 38%, ash content 26%) from a certain waste treatment plant , mixed evenly with the above-mentioned coke-promoting catalyst, added to the garbage carbonization pyrolysis furnace, and pyrolyzed at 350°C for 2 hours, and the pyrolysis coke was taken out after the pyrolysis furnace was cooled to room temperature.

[0022] According to calculations, the yield of pyrolysis coke is 71.1% (based on dry base waste raw materials), and the waste volume reduction rate is 78%.

Embodiment 3

[0024] Take by weighing 428g aluminum hydroxide, 21g urea, 90g kaolin and 105g diatomaceous earth and mix homogeneously to obtain a carbon-promoting catalyst; then weigh 50kg of organic waste (moisture content 35%, ash Content 18%), mixed with the above-mentioned carbon-promoting catalyst, added to the garbage carbonization pyrolysis furnace, pyrolyzed at 400°C for 1.5h, and the pyrolysis coke was taken out after the pyrolysis furnace was cooled to room temperature.

[0025] According to calculations, the yield of pyrolysis coke is 65.5% (based on dry waste raw materials), and the volume reduction rate of waste is 85%.

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Abstract

The invention belongs to the technical field of domestic waste treatment, and concretely relates to a domestic waste pyrolyzing and charring method. A certain amount of a charring promotion catalyst is added to domestic wastes, above materials are uniformly mixed, the obtained mixture is added to a pyrolyzing furnace, and the temperature and the time are controlled to obtain pyrolyzed coke. The cheap and easily available raw material is used as the charring promotion catalyst, so the carbon fixation rate in the waste pyrolyzing process is improved as possible, and formation of volatile organic products is inhibited, thereby harmless and reducing treatment of the domestic wastes is realized.

Description

technical field [0001] The invention belongs to the technical field of domestic waste treatment, and in particular relates to a domestic waste pyrolysis carbonization treatment method. Background technique [0002] At present, the most commonly used disposal methods for domestic waste in my country are sanitary landfill, composting and incineration. There are many problems in the three methods. For example, sanitary landfill has a large area and is easy to pollute soil and water resources; The operation cost is high, and a large amount of acid gas and dioxin are easily produced during the incineration process. [0003] Pyrolysis and carbonization of domestic waste refers to the process of converting domestic waste into solid coke and a certain amount of combustible gas and liquid by-products under anaerobic or hypoxic conditions. According to the different subsequent application methods of target products (solid coke, combustible gas and liquid), pyrolysis carbonization te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/00
CPCC10B53/00
Inventor 董长青陆强胡斌李文涛王昕张润禾
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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