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◎ Thanks to the application of regeneration technology, the cost of using activated carbon has been significantly reduced, making large-scale engineering applications of activated carbon feasible. Through regeneration, activated carbon can be reused multiple times, ultimately bringing the system into a state of balanced adsorption. Meanwhile, the previous situation—where activated carbon could mostly only be used once and then had to be discarded as solid or hazardous waste—has become a thing of the past.
◎ Currently, activated carbon regeneration equipment generally consists of multiple hearth furnace and rotary kilns. With the growing demand for automated operation and cleaner production, multiple hearth furnace—thanks to their outstanding performance and clean operating environment—are gradually replacing rotary kilns in large-scale activated carbon regeneration markets and have become the mainstream equipment for activated carbon regeneration.
◎ multiple hearth furnace come in various model specifications to accommodate different scales of activated carbon regeneration. Coupled with comprehensive exhaust gas treatment processes and well-established adsorption process designs, they have become indispensable components in both environmental protection and material decolorization applications.
Comparison of Two Furnace Types Project multiple hearth furnace regeneration process Rotary Kiln Regeneration Process Regenerated carbon quality High Slow speed Regeneration process Fuzzy Control for the Dry Pyrolysis Process Precise control of drying and pyrolysis processes Temperature control accuracy Each segment’s temperature is controlled within ±5℃. The temperature in the middle section of the furnace is uncontrollable. Oxygen content control The oxygen content can be controlled within 1%. Oxygen levels are difficult to control. Steam consumption Precise control results in steam consumption of approximately one ton per ton of coal. Steam consumption is up approximately 20% year-on-year. Fly ash quantity Few Big Carbon regeneration loss 4%~8% 8%~20% Power consumption Low High Anti-coking capability Evenly spread, not easy to caramelize. Turn and stir—hardened chunks won't easily fall apart. Furnace structure Simple maintenance, low failure rate, light load, and excellent sealing performance. The structure is simple, and the idlers must bear the load of the entire furnace body rotating; the sealing performance is relatively poor. Land area Large in size, yet occupies a small footprint. Axial area occupies space; large footprint.
Activated carbon regeneration
Keywords: Activated carbon regeneration
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