Method for depositing vapour-phase constituents from preferably highly loaded air or technical gases

摘要

The method can be used for simultaneous deposition of organic and inorganic vapour-phase constituents from air or technical gases, for example for recovering petrol from displacement air from petrol stations, solvents from air, etc. and for obtaining extremely dry air or technical gases. The object of the invention is to develop a method which allows recovery of all valuable materials (organic condensates and prepared dried air or gas) from highly loaded air, the European Standards for maintaining purity of air in continuous operation being fulfilled with low energy and investment expenditure. The object is achieved by direct condensation in a cold scrubbing system, a circulating flow of the obtained condensate being used as heat-exchange medium in the cold scrubbing, which flow is supercooled in the lower region by a cold-vapour cooling system and, in the upper region, by a cold-air cooling system, the cold content of the pure air being regeneratively used for cooling the heat-transfer medium in the upper column of the cold scrubbing system and for precooling the compressed air in the cold-air cooling system (Figure 1). <IMAGE>