| In this section, operations such as crushing, washing, and screening are performed to refine, adjust the particle size and dry the nutshell activated carbon. When choosing a grinder, special attention should be paid to not bringing iron powder into the product, and the particle size of the product should be as uniform as possible.
The activated carbon used in the liquid phase adsorption operation is not refined through acid washing and water washing in advance. The impurities contained in the activated carbon will be dissolved into the liquid phase. coconut shell activated carbon water purificationThe inorganic glue used in the washing process is usually industrial hydrochloric acid. Sometimes sulfuric acid and hydrochloric acid are also used. The alkali used in the neutralization is generally sodium hydroxide.
Nutshell activated carbon can be relatively easily refined according to this operation, and in the case of granular activated carbon, it is difficult to sufficiently refine the inside of the particles. The washing and refining equipment and operation are somewhat different between washing powder and washing granules:
Corrosion-resistant materials should be used: intermittent stirring method, circulation method, jet flow method and powder suspension method and other washing and refining methods.
There are also various methods to dry the wet activated carbon after washing and refining. bulk carbon pellets Recently, there is also a practice of simply packaging wet charcoal with a moisture content of about 50% after washing and refining, and then selling it directly to users.
This method is suitable for dry treatment of activated carbon with concentrated water. Although the transportation cost has increased a bit, the scattering loss of carbon during the drying process accounts for the largest proportion of the loss in the entire manufacturing process. There is no scattering loss at the use site, and the operation is convenient. There are many advantages. The chemical method is produced by cattle. Activated carbon adopts this method in many cases. |
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