CN1381305A

CN1381305A - Process for regenerating activated carbon

Info

Publication number: CN1381305A
Application number: CN 01107361
Authority: CN
Inventors: 谢仁智
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-16
Filing date: 2001-04-16
Publication date: 2002-11-27

Abstract

A process for regenerating used deactivated carbon features that the said used deactivated carbon is activated by fume or the mixture of fume and watea steam in single-layer or multi-layer flattening oven. Its advantages are simple process and equipment, low cost and energy consumption, and high output rate and quality of regenerated product.

Description

The renovation process of active carbon

The invention belongs to the regeneration techniques of deactivated active carbon (to call waste active carbon in the following text).Active carbon regeneration is the comprehensive utilization waste active carbon, reduces the consumption of the forest reserves, energy savings, the good approach of protection environment.

Regeneration method of active carbon had chemicals regeneration, heat regeneration etc. in the past.Chemicals regeneration is meant with chemicals handles waste active carbon, makes it have activity again, and for example: the waste active carbon of handling glutamic acid can be used acid-alkali regeneration.This method regeneration effect is poor.Heat regeneration is meant that the method with outer heating is brought back to life waste active carbon, and heat regeneration needs to use high-temperature service, as rotating table furnace, saddle stove, tube furnace, smoldering stove or the like.This method equipment investment is big, the energy consumption height, and smoldering stove regeneration yield is low, and product quality is inhomogeneous.

For the regeneration of powdered activated carbon, except that smoldering stove and chemicals method, other type of furnace is all very difficult, uses fluidized bed furnace and wet oxidation process etc. abroad, but all at the experimental stage.The smoldering stove powdered activated carbon of can regenerating, but have labour intensity big, shortcomings such as energy consumption height; The chemicals method of reproduction, regeneration effect is relatively poor.

The present invention utilizes flue gas at single or multiple lift flattening oven heating waste active carbon, and is warmed up to 600～1000 ℃, with flue gas or the gaseous mixture that feeds water vapour and flue gas waste active carbon is regenerated, and obtains high grade activated carbon through post processing.The present invention has overcome the deficiency of heat regeneration in the past, has that process equipment is simple, reduced investment, energy consumption is low, adaptability is strong, the excellent characteristics of product quality, is easy, practical method in the active carbon regeneration.The regeneration of particularly suitable powdered activated carbon of the present invention.

The present invention places waste active carbon in the single or multiple lift flattening oven burner hearth, use the flue gas heat drying, and when heating to 600～1000 ℃, feeding water vapour (110～400 ℃) mixes as activator with flue gas, 0～5 ton of/ton charcoal of water vapour feeding amount, activate 1～15 hour, waste active carbon is brought back to life, active carbon promptly obtains the high grade activated carbon product through cooling, post processing.

Embodiment one:

Wet waste powdered activated carbon I (moisture 40～65%) adds in the multi-layer planar stove burner hearth, with flue gas drying and be warming up to 600～1000 ℃, the feeding water vapour mixes (0～5 ton of/ton charcoal of water vapour feeding amount) and activates 1～15 hour with flue gas, regenerated carbon is finished product through cooling, post processing.Product methylene blue decolorizing ability 180mg/g, product yield 80%.

Embodiment two:

Wet waste powdered activated carbon II (moisture 40～65%) adds in the multi-layer planar stove burner hearth, with flue gas drying and be warming up to 600～1000 ℃, feed water vapour and mix (0～5 ton of/ton charcoal of water vapour feeding amount) activation 1～15 hour with flue gas, embodiment one post processing is pressed in the cooling back.Get active carbon methylene blue decolorizing ability 150mg/g.

Embodiment three:

Wet waste powdered activated carbon III (moisture 40～65%), add in the multi-layer planar stove burner hearth, use the flue gas heat drying, and be warming up to 600～1000 ℃, feeding water vapour (water vapour feeding amount is 0～5 ton of/ton charcoal) mixes with flue gas, activate 1～15 hour, post processing is carried out by embodiment one scheme in the cooling back.Get active carbon methylene blue decolorizing ability greater than 135mg/g.

Embodiment four:

Contain organic useless granular activated carbon, add in the multi-layer planar stove burner hearth, use the flue gas heat drying, and be warming up to 600～1000 ℃, feed water vapour and activate 1～15 hour, regenerated carbon is finished product through cooling, post processing.Product methylene blue decolorizing ability 165mg/g, active carbon yield 92%.

Reference examples:

Wet waste powdered activated carbon (moisture 40～65%) is regenerated in brick and tile kiln, and regenerated carbon is diverse location in stove, and methylene blue decolorizing ability difference is 90～210mg/g, and active carbon diverse location yield in kiln is 30～80%.

Claims

1, a kind of renovation process of active carbon is characterized in that with flue gas on the single or multiple lift flattening oven, will use the deactivated active carbon in back to be heated to 600～1000 ℃, makes the method for its reactivation with the gaseous mixture of flue gas or water vapour and flue gas.

2, deactivated active carbon is meant in the right 1: waste powdered activated carbon and useless granular activated carbon.