Activated Carbon Regeneration

Preheating Stage (300-600℃):

Before running, the burner preheats the rotary kiln body and the combustion chamber. The waste activated carbon is fed into the feed bin by the elevator and then fed into the rotary kiln by the frequency conversion feeder. In the kiln, the waste activated carbon is dried under the combined action of the lifting plate and the waste heat of the exhaust gas.

Desorption Stage (900-1050℃):

The dried waste activated carbon moves forward continuously in the rotary kiln and slowly enters the desorption stage. The temperature and steam at this stage determine the quality of regeneration. The time is about 25-35 minutes, and the steam volume is 2-3 tons/hour. Usually, we need to gradually turn on the steam after the temperature is stable and reduce the heat supply, making the water vapor react with the carbon to produce water gas so that the micropore surface in the carbon is cleaned. The steam needs to penetrate the activated carbon and an appropriate amount of oxygen can be used to achieve the best regeneration effect.

Cooling Stage:

After the waste activated carbon is regenerated, it is rotated and discharged through the cooling tube of the rotary kiln, and then enters the water cooler, where it is water-cooled for about 3 minutes in an oxygen-free state. After that, it enters the finished product silo through a closed air conveying device.

Waste Gas Treatment Stage:

The draught fan sends the waste gas into the combustion chamber for high-temperature combustion, and then sends it to the waste heat boiler. After that, the boiler draught fan feeds the waste gas into the quench tower, condenser, quicklime jet tower, activated carbon jet tower, cyclone dust collector, and bag filter in turn finally discharging it at an altitude of 35 meters.