Reactivation of activated carbon, servicing and disposal of filters

We ensure the complete servicing of all the systems with activated carbon, i.e. the dismounting of filter cartridges, pouring of used carbon out from filter cartridges, baskets or frames, filling with reactivated activated carbon, remounting of filter cartridges including transport, and disposal or reactivation of the used activated carbon.

According to the requirements, we ensure in cooperation with specialised companies the eco-friendly disposal of used filters.

Reactivation of activated carbon - saturated activated carbon of the SC 40 standard is reprocessed in the rotary counterflow furnace with a gradual increase of temperature from 20 to 830 °C and a delay period of approximately 30 minutes, i.e. conditions similar to those in the production of activated carbon. The activation medium is water vapour and burnt gas. This technological operation gradually results in the drying, thermal desorption of volatile adsorbed substances, and the activation (renewal) of the inner surface to 92 - 100%, exceptionally to more than 100% (additional reaction of the amorphous carbon) of the original value. The operating temperature is sufficient for the pyrolysis of also non-volatile organic substances. Using the equipment, it is possible to reactivate the activated carbon e.g. by polymerising substances, siloxanes, chlorinated hydrocarbons, etc.

This procedure of reactivation has considerable quality advantages as compared to other technologies (e.g. a thermal desorption of 250 - 350 °C), when lower temperatures do not result in the restoration of the activated surface.

The processing operation results in the reactivated activated carbon of the quality standard SC 40. The secondary product, that is a vapour-gas phase containing desorbed substances and burnt gas, is disposed of in an eco-friendly manner by means of mechanical filtration, burning, and alkaline and acid washing. These changes can be identified as a general reduction of the weight of activated carbon by approximately 25% against the saturated activated carbon.

These changes can be identified as a reduction of the bulk density of activated carbon, approximately from 0.6 t/m3 to 0.5 t/m3 and the restoration of activated surface - determination of an iodine value or absorption isothermal line.

Rotary furnace

Recovery coefficien: 0,75-0,85
The coefficient cannot be determined in advance as it depends on:

  • Absorption capacity of the used sorbent
  • Chemical composition of trapped substances
  • Sorbent saturation degree