Method for producing active carbon

Abstract

The invention discloses a method for producing active carbon, comprising the following steps: grinding corn cobs and cornstalks into flocculent corn cob materials and flocculent cornstalk materials bya grinder respectively, evenly mixing and then sending the materials into a particle forming machine to be extruded into particle materials; placing the particle materials into a carbonization kiln to be carbonized to obtain carbonized materials; directly sending the carbonized materials into an activation kiln to be activated without cooling to obtain activated materials; grinding and grading the activated materials to obtain the finished product of active carbon. Wood gas discharged from the flue of the carbonization kiln is introduced into a heating chamber on the lower part of an activation chamber to be ignited for heating the activation kiln; high temperature flue gases generated by combustion of the wood gas are introduced into the flue on the upper part of the activation chamber for carrying out secondary heating on the activation kiln; the flue gases discharged from the flue on the upper part of the activation chamber are introduced out to serve as the heat sources of a steamboiler, and the high temperature steam generated by the steam boiler enters the activation chamber to activate the carbonized materials. The active carbon produced by the method is good in quality and low in cost.

Description

technical field [0001] The invention relates to a method for producing activated carbon, in particular to a method for producing activated carbon by utilizing corncobs and corn stalks. Background technique [0002] Corn cobs and corn stalks are wastes in the agricultural production process. Farmers mostly use them as fuel or incinerate them, which not only wastes resources but also pollutes the environment. CN1446748 discloses a high specific surface area activated carbon and its preparation method. Corncobs are used as raw materials, carbonized with nitrogen protection, and then activated with molecular osmosis activation solution to produce activated carbon after carbonization. However, the production of activated carbon by this method requires nitrogen protection and special molecular osmosis activation solution, resulting in high production costs. CN101016154 discloses a method for producing activated carbon for gas purification and environmental protection by using crop...

AI Technical Summary

Problems solved by technology

[0002] Corn cobs and corn stalks are wastes in the agricultural production process. Farmers mostly use them as fuel or incinerate them, which not only wastes resources but also pollutes the environment. CN1446748 discloses a high specific surface area activated carbon and its preparation method. Corncobs are used as raw materials, carbonized with nitrogen protection, and then activated with molecular osmosis activation solution to produce activated carbon after carbonization. However, the production of activated carbon by this method requires nitrogen protection and special molecular osmosis activation solution, resulting in high production costs. CN101016154 discloses a method for producing activated carbon for gas purification and environmental protection by using crop stalks. In this method, 80-120 mesh of crop stalk powder is sent into a mixer, and 30-40% of water is added in the mixer to stir evenly. The strips of ￠3.0-4.5mm are extruded from the molding machine, and after being air-dried, they are sent to the carbonization furnace for carbonization. After the carbonized carbon strips are cooled, they are sent to the activation furnace for activation. In the production of activated carbon by this method, water should be added to the raw materials before extrusion molding, and air-drying should be carried out after molding, which wastes water resources and increases production costs. The strip is heated up, which increases the production cost and prolongs the production cycle

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