EENVIRONMENTAL PROTECTION (Absorption and Stripping unit, HCL scrubber)

ABSORPTION AND STRIPPING UNIT

This process is needed when gases or vapours to be blown-down are not soluble in water. The absorption of organic solvent contained in an air stream is performed by a special high boiling medium in the Absorption Column, equipped with special packing with low pressure drops and high efficiency. In the second Column (Stripping Column) the bottom solution from the first Column is stripped by direct injection of steam or by an heating system. The solvent is recovered from the top and the absorbent medium, free of the organic solvent, is recycled back to the absorption Column. The solvent is condensed and reutilized, if needed can be sent to further purification. This system is suitable for the purification of an air stream containing in example toluene, xilene and other aromatics, ketones, chlorinated, hydrocarbons, and so on. The advantages of this process are low energy consumption and stability of the absorption medium, which is higher if compared to active carbons.