External heating type high-quality activated carbon high-efficiency energy-saving environment-friendly rotary activation furnace and application method thereof

Abstract

The invention relates to an external heating type high-quality activated carbon high-efficiency energy-saving environment-friendly rotary activation furnace and an application method thereof. The external heating type high-quality activated carbon high-efficiency energy-saving environment-friendly rotary activation furnace comprises a rotary furnace barrel, an external heating furnace body, an activated tail gas recovery combustion system and a flue gas recovery heat exchange system, and further comprises a hot water recovery steam generation system, a steam overheating system and an air preheating system. The annular furnace cavity is divided into a plurality of combustion chambers and a smoke collecting cavity, a plurality of gas burners are arranged on the outer circumferential wall ofthe outer heating furnace body corresponding to the combustion chambers, and the rotary furnace barrel is sleeved with a heat radiation heating body. The application method of the activation furnace comprises the following steps: during blow-in production, auxiliary gas and quantitative air are mixed and combusted to indirectly heat the rotary furnace barrel; a carbonized material is fed into thefurnace barrel, and activation reaction is carried out on the carbonized material and auxiliary water vapor to generate activated carbon and activated tail gas; the activated tail gas exchanges heat,is cooled and then is mixed with quantitative hot air for combustion to replace auxiliary gas; and circulating hot water is fed into a tail gas and flue gas waste heat boiler for heat exchange to generate a large amount of water vapor to replace auxiliary water vapor. The rotary activation furnace significantly improves the quality and yield of activated carbon, and is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of activated carbon production, in particular to an external heating type high-quality activated carbon high-efficiency, energy-saving and environment-friendly rotary activation furnace and an application method thereof. Background technique [0002] Activated carbon rotary activation furnace can be divided into two types: internal heating type and external heating type according to the heating method. [0003] The furnace cavity of the internal heating rotary activation furnace is mostly constructed of refractory bricks and insulation materials, and the heat required for its activation is provided by the oxidation reaction of the air entering the furnace cavity and the activated tail gas generated by the activation reaction of high-temperature carbonized materials in the furnace cavity. , its defect is: 1, part of the carbonized material in the furnace cavity inevitably oxidizes with the air entering the fu...

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Problems solved by technology

[0003] The furnace cavity of the internal heating rotary activation furnace is mostly constructed of refractory bricks and insulation materials, and the heat required for its activation is provided by the oxidation reaction of the air entering the furnace cavity and the activated tail gas generated by the activation reaction of high-temperature carbonized materials in the furnace cavity. , its defect is: 1, part of the carbonized material in the furnace cavity inevitably oxidizes with the air entering the furnace cavity, thereby reducing the charcoal yield of activated carbon; If the temperature is too high, it will not only cause uneven activation of the carbonized material and affect the quality of the activated carbon, but also cause the slagging of the carbonized material and impurities to block the activation channel and affect the normal operation of the rotary activation furnace; If it becomes loose and falls off, it needs to be shut down for maintenance in severe cases, which affects production and reduces the output of activated carbon

[0005] Because the flame produced by the combustion of activated exhaust gas directly contacts one side of the outer peripheral wall of the rotary furnace drum, the temperature at the contact point between the outer peripheral wall of the rotary furnace drum and the flame is higher than the temperature at the non-flame contact point; as the rotary furnace drum rotates slowly and uniformly , the position of any flame contact point on the outer circumferential wall of the rotary furnace tube has a periodic change in the circumferential direction gradually moving away from the flame and then gradually approaching the flame, so that the temperature of the flame contact point gradually decreases and then gradually increases However, due to the long rotation period, it is still not possible to make the temperature of the outer circumferential wall of the rotary furnace tube uniform, resulting in uneven heating of the carbonized material in the rotary furnace tube, and thus uneven activation, which is not conducive to improving the activation of activated carbon. quality and yield

[0006] The sel

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