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A method for co-pyrolysis of solid waste and coal

A technology of co-pyrolysis of solid waste, applied in the direction of educts, biofuels, products, etc., can solve the problem that the gas is not enough to meet the heat required for pyrolysis, and achieve the problem of resource utilization, stable operation, and process applicability wide effect

Active Publication Date: 2020-05-26
西安三瑞实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings existing in the prior art, the object of the present invention is to provide a method for co-pyrolysis of solid waste and coal, which avoids the change of raw material components of solid waste, and the gas produced by pyrolysis is too low to meet the requirements of pyrolysis. The adverse effects of heat demand can meet the needs of pyrolysis reaction by relying on self-produced gas. The above-mentioned process can be industrialized on a large scale. Its process is reasonable, advanced in technology, and economically feasible. It has obvious advantages.

Method used

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  • A method for co-pyrolysis of solid waste and coal
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  • A method for co-pyrolysis of solid waste and coal

Examples

Experimental program
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Effect test

Embodiment 1

[0046]Taking waste rubber and Shanbei coal as an example, the waste rubber and coal with a water content of ≤13% are broken into particles with a particle size of ≤30mm by the solid waste material bin 1 and the coal bin 2 through the crushers 2 and 5, respectively. Metering equipment 3 and 6 measure waste rubber and coal at a ratio of 1:1, and add them to the mixing silo 7 for mixing, and then transport them to the mixing silo in front of the drying furnace by a belt at a flow rate of 200kg / h.

[0047] Analysis index of waste rubber

[0048]

[0049] Raw coal coal quality analysis index

[0050]

[0051]

[0052] The mixed material in the mixing silo enters the drying equipment 8 through the rotary valve and the feeding screw of the drying equipment, where it is dried and heated to 80°C. The water content after drying is ≤5%, and the final temperature of the dried and heated material is 80°C. It is discharged from the outlet of the drying equipment through a rotary v...

Embodiment 2

[0067] Taking wheat straw and Xinjiang coal as an example, wheat straw and coal with a moisture content of ≤21% are crushed into solid waste material bin 1 and coal bin 2 by crushers 2 and 5 to particles with a particle size of 1 to 30 mm, respectively Equipment 3 and 6 are measured according to the 3:1 ratio of straw and coal, and are added to the mixing silo 7 for mixing, and then transported by the belt to the mixing silo in front of the drying furnace at a flow rate of 150kg / h.

[0068] Straw Analysis Indicators

[0069]

[0070] Raw coal coal quality analysis index

[0071]

[0072] The mixed material in the mixing silo passes through the rotary valve and the drying equipment feeding screw and enters the drying equipment 8, where it is dried and heated to 95°C, the water content after drying is ≤5%, and the final temperature of the dried and heated material is 150°C , The dried and heated material is discharged from the outlet of the dryer through the rotary valve ...

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Abstract

The invention discloses a method for co-pyrolysis of solid waste and coal. The method comprises the following steps: mixing solid waste with coal metered, drying, heating, carrying out destructive distillation pyrolysis, so as to obtain solid-state pyrolysis product semi-coke and gas-state pyrolysis product coal gas containing tar gas; cooling and sieving the semicoke, so as to obtain semi-coke with different particle sizes; and carrying out oil-gas separation on coal gas containing tar gas, so as to obtain tar and coal gas, wherein partial coal gas is taken as a heat source for pyrolysis of mixed materials, and rest coal gas is taken as a coal gas product. According to the method, the co-pyrolysis of solid waste and coal is realized by virtue of a horizontal rotary kiln, and the semi-coke, tar oil and coal gas are obtained after the pyrolysis of the mixed materials in the rotary kiln at a certain temperature. The method has the beneficial effects that a technical process is simple, the operation is reliable and stable, the problem that coal gas produced by pyrolysis of solid waste is less than heat required by the pyrolysis of solid waste is solved, and the method has obvious superiority on the treatment of solid waste with great composition change.

Description

technical field [0001] The invention belongs to the technical field of energy development and environmental protection, and relates to a method for co-pyrolysis of solid waste and coal, specifically a method for realizing co-pyrolysis of solid waste and coal by using the low-temperature dry distillation technology of a horizontal rotary kiln. Background technique [0002] At present, the domestic solid waste (municipal waste, waste plastics, sludge, waste rubber, agricultural and forestry waste, etc.) treatment methods mainly include landfill, composting and heat utilization. Due to its advantages of high capacity reduction and energy acquisition at the same time, heat utilization has been at the center of solid waste treatment technology. Among them, the pyrolysis of solid waste can achieve the purpose of harmlessness, reduction and resource recycling. [0003] The pyrolysis of solid waste refers to the pyrolysis of solid waste in an oxygen-free environment to obtain semi-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/02C10B53/04C10B53/07
CPCC10B53/02C10B53/04C10B53/07Y02E50/10Y02P20/143
Inventor 何建祥刘明会张纪刚何方魏超齐涛崔凯
Owner 西安三瑞实业有限公司
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