Activated carbon regeneration method

A technology of activated carbon and regeneration reaction, applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problems of low regeneration rate of activated carbon, narrow use field, and no consideration of loss of activated carbon, etc., achieve high regeneration rate and simple operation , High recovery effect

Inactive Publication Date: 2015-11-25
ZHEJIANG QICAI ECO TECH CO LTD
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Under the conditions of a temperature of about 210°C and an oxygen partial pressure of 0.6Mpa, the measured regeneration rate is about 47%. The regeneration rate of activated carbon is low, and the loss of activated carbon is not considered.
[0009] The Chinese patent literature with the publication number CN101695654A discloses a regeneration method for waste ac...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Add 200g desorption liquid in 20g waste activated carbon, desorption liquid is by volume ratio DMSO:H 2 O=1:19 mixed solution, add 1g of copper sulfate pentahydrate, stir and beating, add to the autoclave, fill with air, and carry out catalytic wet oxidation reaction at a pressure of 8MPa and a temperature of 180°C for 2 hours After filtration, filter cake and oxidation filtrate are obtained, the filter cake is washed with water and then dried at 105-120°C to obtain regenerated activated carbon. The loss rate of the desorption liquid is about 0.2%, the loss rate of the activated carbon is 3.1%, and the regeneration rate is 90.8%.

Embodiment 2

[0072] According to the activated carbon regeneration method described in Example 1, the difference is that the temperature is raised to 150°C. After the reaction, it was measured that the loss rate of the desorption liquid was about 0.2%, the loss rate of the activated carbon was 2.7%, and the regeneration rate was 88.1%.

[0073] It can be seen from Example 2 that the loss rate and regeneration rate measured at 150°C are slightly different from those measured at 180°C.

Embodiment 3

[0081] Add 200g desorption liquid in 20g waste activated carbon, desorption liquid is that the volume ratio is DMSO:H 2 The mixed solution of O=1:19 was added to the autoclave after stirring and beating, and after being filled with nitrogen, the desorption regeneration reaction was carried out at a pressure of 0.5MPa and a temperature of 120°C, and the temperature was lowered and filtered after 1 hour of reaction to obtain a filter cake and Desorb the filtrate, wash the filter cake with water, and dry at 105-120°C to obtain regenerated activated carbon.

[0082] Put the desorption filtrate into the reaction kettle, add 1g of copper sulfate pentahydrate, pass in air, and carry out catalytic wet oxidation reaction at a temperature of 180°C, a pressure of 7Mpa, and a stirring speed of 300r / min. After reacting for 2 hours, the reaction liquid The temperature is lowered to below 80°C, and the reaction liquid is recycled as the desorption liquid for regeneration of the next batch of...

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Abstract

The invention discloses an activated carbon regeneration method. Waste activated carbon and a desorption solution are mixed and pulped to obtain slurry, post treatment is conducted on the slurry to obtain regenerated activated carbon, and the desorption solution contains an organic solvent and water. The post treatment is performed in the mode (a) that the slurry performs catalyzed wet oxidation reaction, and the regenerated activated carbon and an oxidation filtrate serving as the desorption solution to be repeatedly used are obtained through filtration; or the mode (b) that the slurry performs desorption regeneration reaction, the regenerated activated carbon and a desorption filtrate are obtained through filtration, and then the desorption filtrate performs catalyzed wet oxidation reaction to obtain a reaction solution serving as the desorption solution to be repeatedly used. The catalyst adopted for the catalyzed wet oxidation reaction is one or more of copper salt, rhodium salt and palladium salt. The waste activated carbon is regenerated by means of the activated carbon regeneration method, the activated carbon regeneration rate is high, the losses of the activated carbon and the desorption solution are small, the reaction conditions in the regeneration process are moderate, and energy consumption is lower.

Description

technical field [0001] The invention relates to the field of recovery and treatment of industrial solid waste, in particular to a method for regenerating activated carbon. Background technique [0002] After activated carbon has been adsorbed for a period of time, the adsorption capacity will gradually decrease and even be completely lost, and finally become waste activated carbon (saturated carbon). Since the price of activated carbon is generally more expensive, if these saturated carbons are discarded without treatment, it will cause a waste of resources. [0003] The regeneration of activated carbon is to use physical, chemical or biological methods to treat waste activated carbon to remove the adsorbate (usually organic impurities) in the micropores of waste activated carbon to obtain regenerated activated carbon (activated carbon whose adsorption capacity has been restored to a certain extent). [0004] Common waste activated carbon regeneration methods include: chemi...

Claims

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Application Information

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IPC IPC(8): B01J20/34B01J20/20C02F1/28
Inventor 赵瑞强陈磊毛亚军张静宋亿文
Owner ZHEJIANG QICAI ECO TECH CO LTD
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