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A method, system and application for preparing modified activated carbon by two-stage reduction pyrolysis of organic solid waste

An organic solid and activated carbon technology, applied in the preparation of liquid hydrocarbon mixtures, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of organic solid wastes that cannot be effectively treated, and achieve increased quality, specific surface area, and increased output. Large, highly active effects

Active Publication Date: 2021-09-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims at the problem that organic solid waste cannot be effectively treated in the above prior art, and provides a method, system and application for preparing modified activated carbon by two-stage reduction pyrolysis of organic solid waste, and the carbonized product has uniform particle size and good quality

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  • A method, system and application for preparing modified activated carbon by two-stage reduction pyrolysis of organic solid waste
  • A method, system and application for preparing modified activated carbon by two-stage reduction pyrolysis of organic solid waste

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Embodiment 1

[0029] The method for preparing activated carbon by two-stage pyrolysis of organic solid waste according to the present invention is described in detail by taking waste tires as an example.

[0030] 1) Remove the steel wire from the waste tires and cut them into small pieces (less than 3mm) for easy sample loading. The material ratio of the two-stage pyrolysis furnace is 2:1.

[0031] 2) During the preparation of modified thermal coke, firstly, under the atmosphere of inert gas and reducing gas, the organic solid waste in the secondary furnace is pyrolyzed to prepare modified thermal coke. The mass ratio was 5.0. At a temperature of 600°C, the primary rubber block is pyrolyzed, and the volatile matter of the primary pyrolysis and the secondary activated thermal coke are catalytically reformed to obtain activated carbon black.

[0032] 3) Collect activated carbon black and utilize ball mill to carry out ultrafine grinding and pulverization. Carbon black and 2mol / L acid-base so...

Embodiment 2

[0036] The method for preparing modified activated carbon by two-stage reduction pyrolysis of organic solid waste of the present invention comprises the following steps:

[0037] During the preparation of modified thermal coke, firstly, inert gas and reducing gas (water vapor, CO 2 , NH 3 etc.) atmosphere, the organic solid waste in the secondary furnace is pyrolyzed to prepare modified thermal coke, the pyrolysis temperature is 500°C, and the mass ratio of water vapor to material is 0.01. At a temperature of 450°C, the primary rubber block is pyrolyzed, and the volatile matter of the primary pyrolysis is catalytically reformed with the secondary activated thermal coke to obtain activated carbon black, and the generated cracked oil and cracked gas are stored separately, and the secondary furnace The modified thermal coke inside is reformed into activated carbon black. Finally, the collected activated carbon black is ultrafinely ground and pulverized in a ball mill, first mix...

Embodiment 3

[0039] The method for preparing activated carbon by two-stage pyrolysis of organic solid waste of the present invention comprises the following steps:

[0040] During the preparation of modified thermal coke, firstly, inert gas and reducing gas (water vapor, CO 2 , NH 3 etc.) atmosphere, the organic solid waste in the secondary furnace is pyrolyzed to prepare modified thermal coke, the pyrolysis temperature is 800°C, and the mass ratio of water vapor to material is 2.0. At a temperature of 650°C, the primary rubber block is pyrolyzed, and the volatile matter of the primary pyrolysis is catalytically reformed with the secondary activated thermal coke to obtain activated carbon black. The resulting cracked oil and cracked gas are stored separately, and the secondary furnace The modified thermal coke is reformed into activated carbon black. Finally, the collected activated carbon black is ultra-finely ground and pulverized in a ball mill, firstly mixed with an acid-base solutio...

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Abstract

A method, device and application for preparing modified activated carbon by two-stage reduction pyrolysis of organic solid waste. The system includes a two-stage pyrolysis device, a gas supply system, a high-temperature gas purification device, a cooling device, a gas storage device, and an oil storage device. Organic solid waste is pyrolyzed in an atmosphere of inert gas and reducing gas to obtain pyrolysis gas, pyrolysis oil and modified pyrolysis coke. The specific surface area of ​​the modified thermal coke is significantly increased, with high activity and strong adsorption. Activated carbon black is obtained after catalytic reforming of upper-stage pyrolysis volatiles by modified thermal coke, which provides an excellent precursor for the preparation of activated carbon. Activated carbon black is obtained through acid-base activation, carbonization and other processes to obtain high-quality modified activated carbon. The modified activated carbon prepared by the invention has a high rate of adsorption and removal of heavy metal pollutants such as nickel and cadmium in water. The invention not only solves the pollution problem of organic solid waste, but also provides a way for resource utilization of organic solid waste.

Description

technical field [0001] The invention belongs to the field of pyrolysis recovery and reuse of organic solid waste, and in particular relates to a method, system and application for preparing modified activated carbon by two-stage reduction pyrolysis of organic solid waste. Background technique [0002] With the rapid development of industry and agriculture in our country, the annual output of organic solid waste has increased dramatically. Due to improper treatment and disposal of organic solid waste, some organic solid waste that has not been recycled has become "white pollution" or "black pollution". High-temperature pyrolysis can degrade the organic components in organic solid waste and produce volatile substances and solid carbon black. It is an ultimate treatment method for efficient treatment of organic solid waste. Pyrolytic carbon black is the main product of organic solid waste pyrolysis, and its recycling largely determines the economic feasibility of organic solid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324C01B32/336C01B32/342C01B32/36C01B32/39B01J20/20B01J20/30C02F1/28C10G1/00C02F101/20
CPCB01J20/20B01J2220/4875C02F1/283C02F2101/20C10G1/00C10G2300/1003C01B32/324C01B32/336C01B32/342C01B32/36C01B32/39Y02C20/40
Inventor 高宁博王凤超全翠
Owner XI AN JIAOTONG UNIV
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