Activated carbon activation furnace and activated carbon production method

Abstract

An activated-carbon activation furnace and an activated-carbon production method, which relate to the field of activated-carbon production devices and activated-carbon production technologies. The safety of an activated-carbon production process can be improved to a certain extent, the activation furnace can stably work for a long time, and the quality and the productive capacity of produced activated carbon can be greatly improved. The activated-carbon activation furnace comprises a furnace body, a material entry device (13), and a material discharge mechanism (15). A burning passage (6) communicating with the inside of the furnace body is disposed in the furnace body. Air is introduced in the burning passage (6). The inside of the furnace body is in a negative-pressure state, and the air pressure in the burning passage (6) is lower than that in the furnace body. The activated-carbon production method comprises the following steps: step A, arranging a burning passage (6) and material passages (5); step B, introducing steam into the material passages (5); step C, introducing evolved gas in the material passages (5), into the burning passage (6); step D, heating materials in the material passages (5); and step E, introducing flue gas generated in burning into a steam generator (10) for heat exchange. The activated-carbon activation furnace and the activated-carbon production method are mainly used for activated carbon production.

Description

technical field [0001] The invention relates to the field of activated carbon production equipment and activated carbon production technology, more specifically, to an activated carbon activation furnace and an activated carbon production method. Background technique [0002] At present, the production methods of activated carbon at home and abroad are mainly divided into two categories, namely: physical method and chemical method. The physical method is to first put the raw materials (high-quality coal, fruit shells, charcoal, etc.) in a closed furnace body for smoldering and carbonization, and then pass in an appropriate amount of water vapor to activate to obtain activated carbon. The chemical method is to impregnate raw materials (usually sawdust) with chemicals (phosphoric acid, zinc chloride, etc.), and then carbonize and activate them in an air-circulating furnace to obtain activated carbon. At present, many manufacturers use physical methods to produce activated car...

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Problems solved by technology

[0004] However, the existing activation furnaces for the production of activated carbon by physical methods generally have certain technical defects: (1) The safety hazard is relatively large: due to the inconsistency of the carbonized material composition after heating, the change in the amount of gas produced will cause the instability of the gas pressure, the sudden change of the air pressure It will cause deflagration of high-temperature gas, causing safety hazards such as burning at the seal of the furnace body, especially for rotary activation furnaces, the sealing performance of the rotary joint is relatively poor, once burning occurs, it is easy to cause safety accidents

(2) The production capacity and quality of activated carbon are low: because the furnace body cannot be well sealed in the area, the combustible gas precipitated by the heating of the material is easy to burn directly in the area where the material is placed, resulting in a large increase in the amount of carbonized material or activated carbon ablation, reducing the The production capacity and quality of activated carbon increase the consumption of raw materials and energy; at the same time, the existing activation furnace has a limited feeding amount per unit time, and the production capacity of activated carbon cannot be further significantly improved, and the added raw materials are always piled up in the lower part of the activation furnace due to gravity. Difficult to fully contact with steam, resulting in poor activation effect and reduced quality of activated carbon

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