Method for preparing activated carbon

Abstract

The invention discloses a method for preparing activated carbon. The method comprises the following steps: preparing raw material debris from hard broad leaf wood, soft broad leaf wood and needle leafwood according to a weight ratio of 3:2:5, performing spreading in a thickness of 3-5cm, and introducing hot air for drying; mixing a zinc chloride solution as an activator with the dried raw material debris, and performing stirring by using a stirring machine so as to obtain a primary material; carbonizing the primary material at a carbonization temperature of 120-200 DEG C; performing heating activation continuously so as to obtain a primary sample of activated carbon, wherein the activation temperature is 520-550 DEG C, heating is performed at a uniform speed in activation, and the heatingspeed is 10 DEG C / minute; and adding technical hydrochloric acid, separating zinc chloride in the primary sample in the activated sample by using a filtering extraction device, performing water washing, and performing cold air drying, so as to obtain the activated carbon. Compared with the prior art, the method for preparing the activated carbon, which is disclosed by the invention, is low in production cost, and the prepared activated carbon is good in adsorption performance.

Description

【Technical field】 [0001] The invention belongs to the technical field of carbon processing, and in particular relates to a preparation method of activated carbon. 【Background technique】 [0002] In the prior art, plants are usually used as raw materials for the production of activated carbon. For the usual production of activated carbon, the process usually includes: drying, carbonization and activation steps, and the corresponding activated carbon production equipment includes dry drying equipment (drying section), carbonization equipment (carbonization section) ) and activation device (activation section). The material enters from the inlet of the drying device, passes through the carbonization device and the activation device to obtain activated carbon, and the hot air enters the activation device from the hot air inlet of the activation device, and passes through the carbonization device and the drying device in turn, fully contacting the materials in each device Finall...

AI Technical Summary

Problems solved by technology

In order to make the fuel fully combustible, more air needs to be introduced, and the introduction of more air will greatly reduce the temperature of the hot air that is passed into the carbonization device, thus resulting in a lower requirement for a higher temperature in the carbonization device. less than satisfied

In addition, when the raw material of plant activated carbon reaches the carbonization temperature, it will also generate flammable gas. If there is not enough oxygen-containing gas, it will not be fully combusted, which will affect the adsorption performance of activated carbon.

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