Technique for preparing activated carbon from wood raw material by external-heating-free one-step process and carbon activating device

Abstract

The invention provides a technique for preparing activated carbon from a wood raw material by an external-heating-free one-step process and a carbon activating device. An internal-heating drying converter, an external-heating carbonization converter and an internal-heating activating converter are utilized to prepare the activated carbon; the wood raw material is dried in the internal-heating converter to remove moisture by using heating exhaust of the external-heating carbonization converter; the generated water vapor is discharged via a chimney came along the drying medium, thereby avoiding influencing the flammability since the water vapor is mixed with the combustible gas generated during carbonization; the dried raw material falls into the external-heating carbonization converter to perform carbonization, wherein the heating medium is high-temperature activated exhaust from the activating converter; the combustible gas generated in the carbonization process is introduced into the activating converter; the inner wall of the activating converter is also provided with a vapor pipe; a right amount of superheated water vapor can be introduced to perform activating reaction with carbon at high temperature so as to generate hydrogen, carbon monoxide and other combustible gases; the inner wall of the activating is provided with an air pipe; and a proper amount of air can be introduced to combust the combustible gas, thereby keeping the activating temperature.

Description

1. Technical field

[0001] The present invention relates to the technology of making activated carbon by using woody raw materials, in particular to a one-step method of making activated carbon by using woody raw materials without external heating and carbon activation equipment. 2. Background technology

[0002] At present, there are two main methods of making activated carbon from woody raw materials: one is powdery raw materials such as bamboo chips or wood chips, mainly using zinc chloride or phosphoric acid as an activator to prepare powdery activated carbon by internal heating in a rotary furnace, which has waste gas and The problem of waste water polluting the environment will be limited in many areas with strict environmental protection; the other is the two-step water vapor activation method of fruit shells or wood (bamboo) chips or powdery activated carbon, which needs to first remove the fruit shells or wood (bamboo) ) shavings are carbonized to make fruit shell ch...

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