Activated carbon regeneration method

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...

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 activated carbon in the production of glycine. The adsorbed activated carbon is washed and dried with water, mixed with dilute sulfuric acid, heated and treated under pressure, washed and separated to obtain regenerated activated carbon, and the recovery of activated carbon The rate is as high as 94.8%, but the field of application of this method is relatively narrow