Phosphoric acid method active carbon production method

Abstract

The invention discloses a phosphoric acid method active carbon production method, which comprises the following steps: S1, pretreatment: conveying wood chips to a dryer, carrying out drying treatment,screening the wood chips through a screening machine to obtain coarse wood chips, and putting the coarse wood chips into a material bin; S2, stirring: conveying the coarse wood chips from the material bin to a double-auger device, stirring, and adding a phosphoric acid solution into the double-auger device to obtain a pre-product wood chips; S3, carbonizing and activating: conveying the pre-product carbon into a rotary furnace through a belt conveyor, carrying out carbonization and activation treatment, arranging a spiral cylinder at the furnace head of the rotary furnace, and cooling to obtain a primary product carbon; S4, phosphoric acid recovery: conveying the primary product carbon into a recovery barrel, and carrying out phosphoric acid gradient recovery; and S5, dehydrating drying:introducing the primary product carbon into a filter tank, filtering, and finally drying to obtain the active carbon. According to the invention, waste can be effectively utilized, and the productioncost can be greatly reduced by recovering phosphoric acid.

Description

technical field [0001] The invention relates to the field of activated carbon production, more specifically, it relates to a method for producing activated carbon by phosphoric acid method. Background technique [0002] Activated carbon is a specially treated carbon, which generally needs to go through two processes of carbonization and activation. The carbonization process is to heat organic raw materials (nut shells, coal, wood, etc.) under the condition of air isolation to reduce non-carbon components; activation The process is to react with gas or solution, and the surface is eroded to produce a microporous structure. Since the activation process is a microscopic process, that is, the surface erosion of a large number of molecular carbides is point erosion, so the surface of activated carbon has countless fine pores. It can also be used in various adsorption occasions. [0003] There are many ways to produce activated carbon, such as the phosphoric acid method. In the...

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Problems solved by technology

In the process of preparing activated carbon by the existing phosphoric acid method, due to the need for screening, drying, activation and other treatments, there is waste of heat and waste of raw materials in the process, so it is necessary to improve the production method, improve the utilization of energy and reduce the waste of raw materials

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