Carbonization and activation integrated activated carbon production method and equipment

Abstract

The invention relates to a carbonization and activation integrated activated carbon production method and carbonization and activation integrated activated carbon production equipment. The production method comprises the following steps of: preparing a raw material, namely dissociating a coal material at a high speed, pre-oxidizing in an oxygen-rich environment to ensure that the coal material has primary adsorption property, adding solid coal pitch in the coal mixing process, pressing a dissociated and pre-oxidized semi-finished product for forming, and crushing and granulating to form a carbonization and activation raw material; performing carbonization and activation integrated production, namely feeding the raw material into a carbonization and activation integrated furnace, preheating the raw material by using high-temperature flue gas returned to a furnace body, transferring the preheated raw material to a furnace tail from a furnace head with the rotation of the furnace body, and activating the raw material by using mixed gas sprayed from throat tubes of the furnace head and the furnace tail; and cooling the activated raw material by using a cooling system and discharging out of the furnace body. The activation rate is high, yield is high, cost is low, and autothermal equilibrium and product upgrading are realized; meanwhile, environmental pollution is reduced.

Description

technical field [0001] The invention relates to a method and equipment for producing coal-based activated carbon, and more specifically, to a method and equipment for producing activated carbon integrated with carbonization and activation. Background technique [0002] Carbonization and activation are two essential steps in the production and processing of activated carbon. [0003] Carbonization is a slow heating process, roughly divided into three stages: the first stage is the drying stage; the second stage is the pyrolysis stage; the third stage is the carbonization stage, in which polycondensation and decomposition reactions are the main ones. [0004] Activation methods are generally divided into three types, namely gas activation method, chemical drug activation method and chemical physical activation method. At present, manufacturers at home and abroad who produce activated carbon using anthracite, bituminous coal and lignite as raw materials generally adopt the gas...

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Problems solved by technology

[0005] The traditional preparation process of coal-based activated carbon has the following disadvantages: first, the carbonization process and activation process in the traditional process are carried out in independent workshops, the carbonization and activation time is long, the yield is low, and the overall manufacturing cost is high; 1. The transshipment of the required raw materials depends on a large amount of machinery or manpower, which is neither economical nor efficient; thirdly, a separate boiler is required to provide the steam required for carbonization and activation; A large amount of coal is used as fuel, and a large amount of harmful gases and dust such as sulfur dioxide and carbon dioxide are discharged, causing serious environmental pollution

However, the existing rotary activation furnace has the following disadvantages: first, in the normal production process, an external heating source is required continuously, and the required fuel consumption is relatively large; second, the production capacity of a single equipment is small, and process control and adjustment are difficult. Poor product quality stability; third, high heat resistance requirements for equipment materials, and can only be used for the production of charcoal activated carbon, not for the production of coal-based activated carbon

However, this equipment is suitable for the production of activated carbon in a general sense, and cannot be used for the production of coal-based activated carbon; moreover, the equipment itself has not achieved self-heating balance, and a separate boiler is required to supply steam

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