| Waste air purification and solvent recovery The purification of waste air by adsorption is especially suitable for removing organic contaminations to very low residual concentrations. Generally the recovered solvents can be re-used. Basing on decades of experience Silica is in a position to process also special substances and combinations of substances. Activated carbon units with steam regeneration This is the classical process with solvent recovery. We manufacture units up to a capacity of 300,000 m3/h. For chlorinated hydrocarbons, e.g. dichloromethane, we have built several units which achieve residual contents of less than < 20 mg/m3 Activated carbon units regenerated with inert gas At the purification of dry waste gas streams the recovered solvents are dehydrated. Special units e.g. with hydrophobic molecular sieve Pressure Swing Units (PSA) Regeneration by variations in pressure, partly in vacuum. These units often are used in tank farms as 2nd stage downstream of a membrane unit Additionally, we supply: - Condensate cleaning by Air- or Steam stripping - Regeneration of recovered solvents by rectification - Cooling tower, steam generator etc. for completion of an - adsorption plant |
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