Activated carbon regeneration multi-stage furnace_Activated carbon regeneration multi-stage furnace_Suzhou JoyFa Environmental Technology Corp. Ltd.

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Activated carbon regeneration multi-stage furnace

The section furnace is constructed in a steel plate cylindrical furnace body with refractory materials as a fireplace, and is divided into several sections. Each section of the hearth is provided with a disposal outlet around and in the center of the hearth.

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Core technology

The multi-stage furnace is constructed in a steel plate cylindrical furnace body with refractory materials as the fireplace, and is divided into several sections. Each hearth section is equipped with a disposal outlet around and in the center of the hearth, and the disposal is mutually discharged from the outer side of the hearth to the inner side of the hearth and from the inner side of the hearth to the outer side of the hearth by the mixing teeth installed on the mixing arm of the central shaft running at a low speed (0.5-3rpm). The treatment material and the combustion object are in convection contact through the discharge outlet, and the hollow central shaft and the mixing arm located in the center of the furnace are forced by the cold air of the special shaft cooling truck.

Three stages

1. Drying: 100 ℃~150℃. The moisture in activated carbon evaporates and dries.
2. Baking: 150℃~700℃. Evaporation and carbonization of the volatiles in the organic matter adsorbed in the activated carbon pores.
3. Activation: 700℃~1000℃. Steam is blown to remove the carbonized matter in the fine pores of activated carbon in the process of baking, so that activated carbon can recover its activity.

Tail gas treatment

The exhaust after waste activated carbon regeneration contains: high concentration of CO, H2, VOCt, tar, dust and other substances.

Treatment technology

The flue gas from the outlet of the multi-stage furnace is directly introduced into the secondary furnace, and the combustible material in the flue gas is re-burned through the burner to 850℃. If the content of chloride ions in the flue gas is too high, it is necessary to reheat the afterchamber to ≥1100℃, the residence time of the flue gas is ≥2s, and the flue gas after the recovery of waste heat is cooled from 500℃ to below 250℃ within 1s, which can control the conversion of dioxins again. The flue gas after quenching is sprayed into activated carbon powder to adsorb heavy metals and dioxins, and then dust removal, desulfurization and purification treatment.

Process flow

The activated carbon regeneration system mainly adopts multi-stage rake furnace for regeneration, which has the advantages of high recovery rate of activated carbon, small footprint, low operating cost and simple operation of equipment.
The integrated system of activated carbon adsorption, purification and regeneration is mainly used in large-scale water treatment, printing and dyeing, food decolorization and other fields with a large amount of activated carbon. In the process of using activated carbon, the saturated activated carbon is discharged from the bottom of the activated carbon adsorption tower at a fixed time and quantitatively, and then transported to the activated carbon regeneration system (rotary furnace or multi-stage rake furnace) by hydraulic transport; The regenerated activated carbon is hydraulically transported to the activated carbon adsorption tower, and fresh activated carbon is quantitatively supplemented to ensure the stable operation of the activated carbon adsorption system.

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