Method for coal gasification and quick co-production of activated carbon

Abstract

A method for the coal gasification and the quick co-production of activated carbon belongs to the field of chemistry and chemical engineering, and is characterized in that dry coal powder or carbonous organic substances are taken as raw materials, air or the mixture of oxygen and water vapour is taken as a gasifying agent, the ratio of oxygen to coal is adjusted within the range from 0.3 to 0.58 Nm<3> / kg, the ratio of vapor to coal is adjusted within the range from 0.01 to 0.5 kg / kg, a co-production device is operated under the condition that the gasification reaction temperature is 1200-1400 DEG C and the operating pressure is 0.1-4.0 Mpa, and 75-90% of organic compositions in the dry coal powder or the carbonous organic substances can be converted into coal gas; the high-temperature coal gas from the co-production device is subjected to temperature reduction by a waste heat boiler and gas-solid separation by a dust remover, so as to obtain semi-finished activated carbon; finally, the semi-finished activated carbon is subjected to acid pickling, wet floatation and drying, so as to obtain the co-production activated carbon. According to the invention, the activated carbon product obtained by adopting the method has an advanced mesopore structure and excellent liquid phase adsorption and decoloration performance, the adsorbing and purifying effects to organic substances in water are superior to those of high-priced activated carbon products prepared by adopting certain traditional methods, no pollution is generated in the production, and the efficiency is high, so that the method is environment-friendly, and can be used for producing activated carbon in a clean manner.

Description

technical field [0001] The invention relates to a method for clean and rapid production of powdered activated carbon, which belongs to the field of chemistry and chemical engineering, and particularly relates to a method for moderate gasification of pulverized coal or powdered carbon-containing organic matter in a dry feed co-production device A method for simultaneously co-producing high value-added powdered activated carbon with syngas or fuel gas. Background technique [0002] As an excellent adsorption material, activated carbon has become an indispensable environmental protection product for human beings to improve their own living environment. Especially with the continuous increase of environmental protection in recent years, the domestic demand and export volume of activated carbon have continued to grow. At present, the main processes of activated carbon production at home and abroad include physical activation and chemical activation. The physical activation proce...

AI Technical Summary

Problems solved by technology

This method not only reduces the energy consumption and cost of the current high-temperature coal gasification operation, but also solves the problems of long activation time, high energy consumption, and serious pollution in the traditional activated carbon production process, and greatly improves the production scale and production efficiency of activated carbon.

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