Two-stage fluidization and activation integrated furnace and method for preparing activated carbon by physical method

Abstract

The invention discloses a two-stage fluidization and activation integrated furnace and method for preparing activated carbon through a physical method. The integrated furnace comprises a furnace body, and the furnace body comprises an upper fluidization area, a middle fluidization area and a lower fluidization area; an upper air electrode box is arranged at the upper part of the upper fluidization area, and a plurality of air caps communicated with the upper air electrode box are arranged in the upper fluidization area; a mixed gas electrode box is arranged in the middle fluidization area, a plurality of air caps are arranged on the upper portion of the mixed gas electrode box, an annular gas electrode box is arranged in the bottom in the furnace, and a gas outlet is formed in the upper portion of the annular gas electrode box and connected with the annular gas electrode box. According to the two-stage fluidization and activation integrated furnace for preparing the activated carbon through the physical method, fixed carbon in materials can be better protected, and invalid ablation of the fixed carbon is reduced. By utilizing the advantages of the fluidized bed, the activation integrated furnace disclosed by the invention has the advantages of high mass and heat transfer speed, uniform reaction, high activator utilization efficiency and energy conservation, the material temperature in the reaction material layer can be controlled, the yield of activated carbon is improved, and high-quality activated carbon can be prepared.

Description

technical field [0001] The invention relates to the technical field of activated carbon activation and regeneration in an activation furnace, in particular to a two-stage fluidized activation integrated furnace and a method for preparing activated carbon by a physical method. Background technique [0002] Among the existing industrialized devices for preparing activated carbon, there are the following types: 1. Sleep furnace: It is difficult to start and stop the Sleep furnace, the activation period is long, and the use efficiency of the activator is low. Take the water treatment carbon iodine adsorption value of 1000 as an example , the residence time of the material in and out is more than 48h, and the conversion rate of fixed carbon in the material is less than or equal to 50%; 2. Rotary furnace: decompose to produce primary activated carbon products, and the output of activated carbon is low. Internal heating type, due to uneven gas contact, low conversion rate, poor qua...

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Problems solved by technology

[0003] To sum up, the existing activation furnace system has the following defects: strong selectivity to raw materials, high equipment maintenance costs, long activation time, resulting in more invalid activation, and expanding the activated effective pore structure into invalid large ones. hole, resulting in a low conversion rate of finished products; the activation tail gas is difficult to handle, and even requires an external heat source for harmless treatment; because the raw material used in conventional activation is carbonized material, it needs to be cooled directly by water cooling or indirect cooling, resulting in the opening of the raw material during the pyrolysis process The pores are closed again, which increases the difficulty of activation and inhibits the space for preparing high-quality activated carbon

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