METHOD FOR COOLING A PROCESS GAS COMPRISING HYDROGEN AND WATER VAPOR FROM A DEVICE FOR OBTAINING HYDROGEN

摘要

The invention relates to a method for cooling a process gas comprising hydrogen and water vapor, produced in a device for obtaining hydrogen by steam reforming. The process gas (5) is cooled to a temperature below the condensation temperature of the water vapor present in the process gas, and the process condensate (12) obtained hereby is separated. The enthalpy of the process condensate (12) is used, for example, by returning the process condensate (12) into the steam reformer process or by heating a material flow. According to the invention, the process gas (5) is applied with a coolant in at least one contact device (9), wherein by direct cooling at least a part of the water vapor to be separated from the process gas condenses and is discharged with the coolant.