Process for obtaining activated carbon by physical activation method

Abstract

The invention relates to a process for obtaining activated carbon by a physical activation method. The process comprises the following steps: S1, crushing, namely tearing and crushing wood into sawdust by a crusher; s2, drying, namely conveying smashed wood chips into a drying oven through a conveyor to be dried; s3, carbonizing, namely feeding dried sawdust into a carbonizing device through a spiral conveyor, and carrying out heat conduction heating on the carbonizing device through a combustion system to form carbon; s4, discharging carbon, namely cooling the formed carbon, and fully coolingto obtain matrix carbon; and S5, preparing the activated carbon, namely putting the matrix carbon into a physical activation device, conveying water vapor into the physical activation device, enabling the matrix carbon to be in direct contact with the water vapor, and enabling the water vapor to destroy the cell structure of the matrix carbon to allow the matrix carbon to form countless nanoscalepore structures, thereby obtaining the activated carbon.

Description

technical field [0001] The invention belongs to the technical field of activated carbon preparation, and in particular relates to a process for obtaining activated carbon by a physical activation method. Background technique [0002] Activated carbon has the advantages of good chemical stability and large specific surface area, and has a wide range of applications in the fields of adsorption, separation, and catalysis. Its preparation is mainly through charcoal, wood chips, coconut shells, fruit cores, polymers, coal, and heavy petroleum. It is prepared by carbonization activation, and the activation process has an important impact on the pore structure of activated carbon, and ultimately determines the performance of the material in the target application field. [0003] Chemical activation is the introduction of chemical drug activation into the production process of granular carbon. A series of crosslinking or polycondensation reactions between chemical reagents and carbo...

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Problems solved by technology

[0003] Chemical activation is the introduction of chemical drug activation into the production process of granular carbon. A series of crosslinking or polycondensation reactions between chemical reagents and carbon materials to create rich micropores is a common method for producing activated carbon by chemical methods. The advantage of chemical activation is that the activation time is short and the activation temperature is low. However, the use of a large number of chemical reagents increases the cost of preparation, and it has a strong corrosion effect on equipment at high temperatures. A large amount of water is required in the washing process. These wastewater can only be processed after complex treatment processes. Meet environmental protection emission requirements, and the consumption of activator is large, the recovery rate is low, and the waste water and waste gas produced are harmful to the environment

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