Ruhrgas Aktiengesellschaft

Randolf Ruediger Forster

The gas which is to be dried is fed into an absorber ( ) where it is brought into contact with a glycol in countercurrent. The glycol absorbs the moisture from the gas and impurities. The glycol laden with water and impurities is removed from the absorber ( ) via a line ( ). It is then regenerated in a reboiler ( ) where the water is eliminated by heating. The water-free glycol is passed into a storage vessel ( ) from which it can then be refed to the absorber ( ). The glycol which is withdrawn from the storage vessel ( ) is purified by mixing it with at least half the quantity of water. The mixture is brought to a temperature above cloud point where it is maintained for a predetermined length of time so that the impurities flocculate. The flocculated impurities are removed in a filter ( ) arid the purified glycol mixed with water is refed to the reboiler ( ) via a line ( ). The drying process is very economical as it integrates environmentally-friendly and simple purification of the glycol.

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Bochum, Germany

Randolf Ruediger Forster