Application Field
Chemistry
SOLVENT RECOVERY
CHAUMECA TECHNOLOGY deals with effluents containing solvents and/or VOCs, more or less concentrated in a carrier gas which can be air or nitrogen (polluted gas). The treatment involves recovering these solvents (xylene, heptane, hexane, etc.) by adsorption in an activated carbon reactor for valorization through reuse or for depolluting the carrier gas. This treatment is carried out at or near atmospheric pressure and at ambient temperature.
Depending on the concentration of solvent and/or VOC, adsorption is implemented on a system comprising at least two activated carbon columns, while ensuring continuous operation. The process uses low-pressure steam (3 to 4 barg) for regeneration.
For low concentrations of solvent in the polluted gas, it is necessary to perform pre-concentration using a rotary adsorber. The treated effluent (polluted air or nitrogen) comes out purified from the unit and can be discharged directly into a stack or connected to a downstream process if necessary.
The adsorbed solvents and/or VOCs are recovered as liquids during the regeneration phase of the unit. The ultimate residue is slightly contaminated water, which will be settled before discharge.