System and method for preparing active carbon by use of coal

Abstract

The invention relates to a system and method for preparing active carbon by use of coal. The system comprises a pyrolysis furnace, a combustor, a purifying and separating device and a fluidized bed, wherein the pyrolysis furnace comprises a feed port and a solid outlet and is used for pyrolyzing the raw material coal to generate carbon residue; the combustor is provided with a fuel gas inlet and a combustion flue gas outlet and is used for heating the raw material coal to generate combustion flue gas; the purifying and separating device is provided with a combustion flue gas inlet and a carbon dioxide outlet, the combustion flue gas inlet is connected with the combustion flue gas outlet, and the purifying and separating device is used for purifying and separating the combustion flue gas to obtain carbon dioxide; and the fluidized bed is provided with a solid inlet, an activator inlet, a waste gas outlet and an active carbon outlet, the solid inlet is connected with the solid outlet of the pyrolysis furnace, the activator inlet is connected with the carbon dioxide outlet of the purifying and separating device, and the fluidized bed is used for activating the carbon residue to generate active carbon. In the invention, the existing fluidized bed does not need to be transformed, the heat loss is reduced, the energy consumption is lowered, and the capacity of the pyrolysis furnace is increased.

Description

technical field [0001] The invention belongs to the technical field of activated carbon produced by pyrolysis and gasification technology. Specifically, the invention relates to a system and method for preparing activated carbon, especially a system suitable for preparing activated carbon by pyrolysis and gasification using coal as raw material and methods. Background technique [0002] Activated carbon is a porous carbon adsorbent that is widely used in water treatment, air purification, solvent recovery and other industrial sectors, especially its application in wastewater treatment has accelerated its development. It is estimated that the world's total annual output has reached 50- 600,000 tons. In 1983, the output of activated carbon in my country has reached 35,000 tons, more than 80 varieties. [0003] However, the production technology and production equipment of activated carbon are still very backward. At present, the production technology of most coal-based activat...

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Problems solved by technology

[0006] In order to solve the above problems of backward production process and production equipment of activated carbon, improve the production efficiency of activated carbon and reduce production cost, the present invention provides a system and method suitable for preparing activated carbon by pyrolysis and gasification using coal as raw material

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