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Powder-like active carbon regenerating method

A technology of powdered activated carbon and non-woven fabrics, applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problems of large activated carbon loss, large dust, secondary environmental pollution, etc., to avoid low recycling rate , the effect of maintaining the adsorption rate

Pending Publication Date: 2019-10-22
安徽鑫汇碳业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the regeneration of waste activated carbon mainly includes biological regeneration method, photocatalytic regeneration method, etc. However, due to the small particle size and light weight of powdery waste activated carbon, the traditional waste activated carbon regeneration method is likely to cause excessive loss of activated carbon. There will be too much dust in the air, causing secondary pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for regenerating powdery activated carbon, comprising the steps of:

[0020] 1) Screening: Dry the waste powdery activated carbon in a dryer until the moisture content is lower than 40%, spread the dried waste activated carbon on a non-woven fabric with pores, and connect both sides of the non-woven fabric to the vibration Start the vibrating device at both ends of the device, and the non-woven fabric vibrates under its drive, and the ash and solid impurities in the waste powdery activated carbon fall from the pores of the non-woven fabric, and the pores of the non-woven fabric are 2000 mesh;

[0021] 2) Washing: collect the waste powdery activated carbon reserved on the upper surface of the non-woven fabric, add it to the hydrochloric acid solution, adjust the pH concentration to 3, stir, heat to 110°C, reflux for 9 hours, filter after cooling, and the obtained filter residue is washed with washing liquid Rear dry, obtain the waste powdery activated carbon aft...

Embodiment 2

[0028] A method for regenerating powdery activated carbon, comprising the steps of:

[0029] 1) Screening: Dry the waste powdery activated carbon in a dryer until the moisture content is lower than 40%, spread the dried waste activated carbon on a non-woven fabric with pores, and connect both sides of the non-woven fabric to the vibration Start the vibrating device at both ends of the device, and the non-woven fabric vibrates under its drive, and the ash and solid impurities in the waste powdery activated carbon fall from the pores of the non-woven fabric, and the pores of the non-woven fabric are 2500 mesh;

[0030] 2) Washing: collect the waste powdery activated carbon reserved on the upper surface of the non-woven fabric, add it to the hydrochloric acid solution, adjust the pH concentration to 3-4, stir, heat to 110°C, reflux for 9 hours, filter after cooling, and the obtained filter residue is washed After liquid washing, dry, obtain the waste powdery activated carbon afte...

Embodiment 3

[0038] A method for regenerating powdery activated carbon, comprising the steps of:

[0039] 1) Screening: Dry the waste powdery activated carbon in a dryer until the moisture content is lower than 40%, spread the dried waste activated carbon on a non-woven fabric with pores, and connect both sides of the non-woven fabric to the vibration At both ends of the device, start the vibrating device, and the non-woven fabric vibrates under its drive, and the ash and solid impurities in the waste powdery activated carbon will fall from the pores of the non-woven fabric. The pores of the non-woven fabric are 2300 mesh;

[0040] 2) Washing: collect the waste powdery activated carbon reserved on the upper surface of the non-woven fabric, add it to the hydrochloric acid solution, adjust the pH concentration to 3-4, stir, heat to 110°C, reflux for 9 hours, filter after cooling, and the obtained filter residue is washed After liquid washing, dry, obtain the waste powdery activated carbon af...

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Abstract

The invention discloses a powder-like active carbon regenerating method, which comprises: screening, washing, regenerating, acidifying, ultrasonic wave regenerating, collecting, and wastewater neutralizing. According to the present invention, the waste powder-like active carbon is washed with the specific washing liquid, such that the problems that the previous powder-like active carbon is not easily washed, and contains more impurities, the washing step is complicated, and the later regeneration rate is affected are changed, the problems of low recycling rate and the like after regeneration are avoided, and the washing is performed by the ultrasonic waver device so as not to damage the pores, such that the adsorption capacity is further maintained.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a method for regenerating powdered activated carbon. Background technique [0002] As an excellent and efficient adsorbent, activated carbon is widely used in various fields such as chemical industry, food, pharmaceuticals and environmental protection. If the used activated carbon is discarded, landfilled or incinerated without treatment, it will not only waste resources, but also cause secondary pollution. In fact, activated carbon adsorption is a physical process. By adopting appropriate regeneration technology to desorb and remove the substances adsorbed by activated carbon, so as to restore the original adsorption characteristics, the purpose of repeated use can be achieved. It not only reduces waste activated carbon, makes it harmless and recycles, but also reduces the waste of energy. [0003] At present, the regeneration of waste activated carbon mainly includes bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/20C02F1/66
CPCB01J20/3416B01J20/3441B01J20/3475B01J20/3483C02F1/66
Inventor 胡志杰陈红锋
Owner 安徽鑫汇碳业有限公司