Regeneration method of waste powdered activated carbon

A technology of powdered activated carbon and waste activated carbon, which is applied in separation methods, filter regeneration, chemical instruments and methods, etc. It can solve the problems of reducing fixed carbon content, waste of output, and easy to raise dust, so as to prevent dust explosion and reduce equipment investment and operating costs, to ensure the effect of the activation effect

Pending Publication Date: 2020-09-04
江苏双优环境科技有限公司
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  • Application Information

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Problems solved by technology

This method adopts a one-step activation method after the material is dried, and supplies necessary oxygen, gas and water vapor to the activation furnace through a blower. The balance point between the activated carbon and the activation effect will easily cause product quality problems. At the same time, the particle size of the waste powdery activated carbon is very fine, and it is easy to raise dust and be directly incinerated. There is also the risk of dust explosion, and directly burning organic matter will also reduce the content of fixed carbon, resulting in unnecessary waste of output

Method used

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  • Regeneration method of waste powdered activated carbon

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Effect test

example 1

[0029] (1) The a-type powdery waste activated carbon is slowly moved from top to bottom through the disc and the above scraper. The material is in contact with the discs at all levels during the movement. The heat source of the disc is provided by the saturated steam generated by the waste heat boiler. The material and The steam in the disk jacket conducts heat exchange, the water in the powdery waste activated carbon evaporates, and at the same time part of the low-boiling organic liquid volatilizes, and the gas generated by drying is condensed by the fan and enters the secondary combustion chamber.

[0030] (2) Introduce nitrogen into the carbonization furnace to drive out the air, and raise the temperature of the furnace to 650°C by heating the jacket. After drying, the material enters the carbonization furnace through a closed feeding method, and the residence time is 60 minutes. The organic matter is removed by pyrolysis and polycondensation reaction, and the generated pyr...

example 2

[0033] (1) The b-type powdery waste activated carbon is slowly moved from top to bottom through the disc and the above scraper. The material is in contact with the discs at all levels during the movement. The heat source of the disc is provided by the saturated steam generated by the waste heat boiler. The material and The steam in the disk jacket conducts heat exchange, the water in the powdery waste activated carbon evaporates, and at the same time part of the low-boiling organic liquid volatilizes, and the gas generated by drying is condensed by the fan and enters the secondary combustion chamber.

[0034] (2) Introduce nitrogen into the carbonization furnace to drive out the air, and raise the temperature of the furnace to 550°C by heating the jacket. After drying, the material enters the carbonization furnace through a closed feeding method, and the residence time is 80 minutes. The organic matter is removed by pyrolysis and polycondensation reaction, and the generated pyr...

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Abstract

The invention discloses a regeneration method of waste powdered activated carbon. Waste activated carbon is fully recycled; resource waste and environmental pollution are avoided; the regeneration method conforms to circular economy principle; the positive effects of energy conservation and emission reduction are achieved; an indirect heating carbonization and activation two-step method is adopted; organic matters can be thoroughly removed from the source; the waste activated carbon can be fully activated, so that the quality of the waste activated carbon is guaranteed; the whole production process is in an oxygen-free environment, so that the organic matters are fully carbonized to finally form fixed carbon to be adhered to the activated carbon, the effective activated carbon is preventedfrom being burnt and wasted, meanwhile, fixed carbon after carbonization of the organic matters is collected, the waste is fully utilized, and meanwhile, the risk of dust explosion is also avoided due to the oxygen-free atmosphere.

Description

technical field [0001] The invention relates to the technical field of activated carbon preparation, in particular to a method for regenerating waste powdered activated carbon. Background technique [0002] Activated carbon is an excellent adsorbent, and it is difficult to produce substitutes in a short period of time. With the improvement of environmental protection policies and living standards, the application range of activated carbon is becoming wider and wider. However, due to the fact that activated carbon is easily saturated during use and loses its adsorption capacity, Thereby it is necessary to achieve the effect of use by frequent replacement. Activated carbon is expensive, and every time it is replaced with new carbon, it will increase the operating cost of the enterprise. Therefore, it is necessary to consider the regeneration and utilization of saturated activated carbon to achieve the purpose of recycling. [0003] There are currently two processing technique...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/30
CPCB01J20/3416B01J20/3466B01J20/3483
Inventor 郑李辉魏东红卢炳杰刘凯华李万龙魏昌鹏
Owner 江苏双优环境科技有限公司
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