Process for producing activated carbon by physical activation method

Abstract

The invention discloses a process for producing activated carbon by a physical activation method. The process is characterized in that an activation process is added on the basis of machine-made straw charcoal, and comprises the following steps of: crushing and grinding the straw charcoal into powder and pressing the powder again to form grains; and feeding the grains into a special externally heated rotary activating furnace and performing activation by taking a gas as an active agent to obtain a finished product. The activation principle of the process is that: the activated carbon has strong adsorption capacity due to a special microcrystalline structure, well-developed micropores and great specific surface area thereof, and is produced by making the carbon form the porous microcrystalline structure and the straw carbon have a well-developed specific surface area. The machine-made straw charcoal produced by the process has high quality and high adsorption capacity, can be used for the production of firecrackers and fireworks, also can be widely used for the water purification for drinking water, alcoholic beverages and various cooling beverages and the advanced purification of industrial waste sewage and domestic sewage, and is also suitable for the purification of indoor air.

Description

Technical field: [0001] The invention belongs to the technical field of crop straw treatment, and in particular relates to a process for producing activated carbon by using a physical activation method. Specifically, it is a production process of using wheat straw, bean straw, rice straw, corn straw, corn cob, cotton firewood and other crop straw to produce activated carbon for water treatment by physical method. Background technique: [0002] The main function of activated carbon for water treatment is adsorption. Adsorption is an important physical and chemical method for wastewater treatment. It can effectively remove various pollutants in wastewater, especially highly toxic and refractory pollution that is difficult to effectively treat by other methods. After treatment, the water quality is good and relatively stable, so the adsorption method plays an irreplaceable role in wastewater treatment. With the stricter discharge standards and the urgent need to recycle water ...

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Problems solved by technology

[0008] As can be seen from the above analysis, the existing straw carbonization technology, no matter it is to utilize the direct carbonization process of straw, or the technology of carbonizing the carbonization after using the straw carbonization of solidification molding, all there is technical defect, and the former problem is The calorific value and carbon content of this straw charcoal make it unusable in actual production. The latter problem is serious environmental pollution, and the resulting product has poor adsorption capacity and cannot be used as activated carbon for water treatment, but can only be used for general fireworks. Production of firecrackers

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