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Method for regenerating activated carbon by steam

A technology of activated carbon and steam, which is applied in separation methods, filter regeneration, chemical instruments and methods, etc. It can solve problems affecting the adsorption performance of regenerated carbon, the decrease of mechanical strength of regenerated carbon, and the change of chemical structure of carbon surface, so as to ensure the mechanical strength and surface properties, reducing the effect of reaction and reducing carbon loss

Active Publication Date: 2020-11-06
浙江红狮环保股份有限公司
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Problems solved by technology

[0006] The above patents and existing technologies are still commonly used in the industry at this stage. Thermal regeneration method, traditional thermal regeneration method uses water vapor, flue gas, carbon dioxide and other gases The medium regenerates activated carbon in equipment such as multi-layer furnaces, tube furnaces, and sintering furnaces. However, during thermal regeneration, the carbon will chemically react with the medium gas to cause the loss of activated carbon. For example, water vapor will react with carbon at high temperature to generate hydrogen. 5%-10% carbon loss due to carbon monoxide gas, this carbon loss will also cause the mechanical strength of the regenerated carbon to decrease, the chemical structure of the carbon surface will change, and affect the adsorption performance of the regenerated carbon

Method used

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  • Method for regenerating activated carbon by steam
  • Method for regenerating activated carbon by steam
  • Method for regenerating activated carbon by steam

Examples

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Effect test

Embodiment 1

[0029] A method for steam regeneration activated carbon, its main scheme comprises:

[0030] Step 1. Charcoal drying, put the waste activated carbon into the hopper, add 0.01% silyl sulfide inhibitor, mix evenly, then transfer to the drying furnace, control the temperature at 80°C and dry it into dry carbon powder;

[0031] Step 2, heat regeneration, transport the dried dry charcoal powder to the boiling activation furnace, and use the high-temperature medium gas to blow the charcoal powder for 12s to obtain the regenerated charcoal powder and furnace gas; it is characterized in that the high-temperature medium gas contains mole 1% water vapor for inhibiting gas;

[0032] Step 3: Collect the regenerated carbon, introduce the regenerated carbon powder and furnace gas into the separator, separate the regenerated activated carbon and furnace gas, collect the regenerated activated carbon in the hopper and cool to 100°C to discharge; after the furnace gas is separated, reheat it th...

Embodiment 2

[0042] A method for steam regeneration activated carbon, its main scheme comprises:

[0043] Step 1. Charcoal drying, put the waste activated carbon into the hopper, add 0.04% silyl sulfide inhibitor, mix evenly, then transfer to the drying furnace, control the temperature at 100 ℃ and dry into dry carbon powder;

[0044] Step 2, heat regeneration, transport the dried dry charcoal powder to the boiling activation furnace, and use the high-temperature medium gas to boil the charcoal powder for 24s to obtain the regenerated charcoal powder and furnace gas; it is characterized in that the high-temperature medium gas contains mole 10% water vapor suppressed gas;

[0045] Step 3. Collect the regenerated carbon, introduce the regenerated carbon powder and furnace gas into the separator, separate the regenerated activated carbon and furnace gas, collect the regenerated activated carbon in the hopper and cool to 130°C for discharge; after the furnace gas is separated, reheat it throug...

Embodiment 3

[0056] A method for steam regeneration activated carbon, its main scheme comprises:

[0057] Step 1. Charcoal drying, put the waste activated carbon into the hopper, add 0.08% silyl sulfide inhibitor, mix evenly, then transfer to the drying furnace, control the temperature at 120°C and dry into dry carbon powder;

[0058] Step 2, heat regeneration, transport the dried dry charcoal powder to the boiling activation furnace, and use the high-temperature medium gas to blow the charcoal powder for 30 seconds to obtain the regenerated charcoal powder and furnace gas; it is characterized in that the high-temperature medium gas contains mole 20% water vapor suppressed gas;

[0059] Step 3. Collect the regenerated carbon, introduce the regenerated carbon powder and furnace gas into the separator, separate the regenerated activated carbon and furnace gas, collect the regenerated activated carbon in the hopper and cool to 150°C for discharge; after the furnace gas is separated, reheat it...

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Abstract

The invention relates to the field of environmental protection, in particular to a method for regenerating activated carbon through steam. The method comprises the steps of carbon drying, thermal regeneration and regenerated carbon collection. According to the method for regenerating the activated carbon by steam, a plurality of methods are adopted to jointly inhibit chemical reaction between water vapor and a carbon material. By utilizing a balance principle, hydrogen and carbon monoxide are added into high-temperature medium water vapor, the reaction can be inhibited by increasing the concentration of a product, and the carbon loss is reduced; on the other hand, the silane-based sulfide inhibitor is added into the waste activated carbon, the oxidation-reduction reaction can be inhibitedat the same time, the reaction between the carbon material and water vapor is reduced through the combined action, the loss of the carbon material is reduced to the maximum extent, and the mechanicalstrength and the surface performance of the carbon material are guaranteed; according to the technical scheme, the method is low in cost and environmentally friendly, is purely green circular economyand can be applied to activated carbon reproduction on a large scale.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for steam regeneration of activated carbon. Background technique [0002] As an adsorbent, activated carbon is widely used in various aspects such as sewage treatment and air pollution prevention and control in the field of environmental protection; although activated carbon has good adsorption capacity for heavy metals and organic matter, it cannot be used continuously due to the problem of adsorption saturation of activated carbon. regenerated so that it can be reused. [0003] CN109433173A discloses a method for regenerating waste activated carbon, which belongs to the technical field of environmental protection. The method for regeneration comprises the following steps: adding water to the waste activated carbon to obtain wet waste activated carbon; entering the wet waste activated carbon into the tail end of the carbonization furnace for high-temperature car...

Claims

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Application Information

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IPC IPC(8): B01J20/34B01J20/20
CPCB01J20/3416B01J20/20
Inventor 李春萍唐柯赵正斌黄敏锐李学军郭嘉诚吴晨钰李贤忠
Owner 浙江红狮环保股份有限公司
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