Verfahren und Vorrichtung zur Gasreinigung

DE 19840409 C UPAB: 20000215 NOVELTY - Gas dehumidification takes place into two steps in which the raw gas is first cooled in a heat exchanger with the cleaned gas and then finally cooled in a refrigerator to remove the last traces of moisture. DETAILED DESCRIPTION - Raw gas is cooled in a commercial heat exchanger (1) by cold, clean, gas coming from a refrigerator (2). The temperature of the clean gas in the heat exchanger is controlled by a controller (4) by its temperature at entry by bypassing warm, clean, gas to mix with that from the refrigerator. If necessary, additional heat can be obtained through a heat exchange with the warm air from the condenser of the refrigerator. About 66% of moisture is removed in the pre-cooler at a temperature of 1-17 deg. C. The remainder is removed in the refrigerator, where the gas is cooled to -40 deg. C. Gas flowrates are about 2000 m3/hour. USE - For the removal of water vapor from a gas. ADVANTAGE - Standard heat exchangers can be used. Energy requirements are comparatively low.