Method and device for generating a gas product

Abstract

The invention relates to a method and also a device for producing a gas product, wherein a first gas stream is combined with a second gas stream and the first gas stream that is present at a lower output pressure than the second gas stream is fed to a mechanical compressor in order to be compressed to the preset pressure of the gas product. It is characteristic in this case that the pressure of the first gas stream is elevated using a gas jet compressor arranged upstream of the mechanical compressor, to which gas jet compressor at least a part of the second gas stream is fed as pumping medium.

What we claim is: 
     
         1 . A method for producing a gas product, wherein a first gas stream is combined with a second gas stream and the first gas stream that is present at a lower output pressure than the second gas stream is fed to a mechanical compressor in order to be compressed to the preset pressure of the gas product, characterized in that the pressure of the first gas stream is elevated using a gas jet compressor arranged upstream of the mechanical compressor, to which gas jet compressor at least a part of the second gas stream is fed as pumping medium. 
     
     
         2 . The method according to  claim 1 , characterized in that the part of the second gas stream that is used as pumping medium is fed directly to the gas jet compressor with substantially the output pressure of the second gas stream or subsequently to a pressure elevation carried out using the mechanical compressor. 
     
     
         3 . The method according to  claim 1 , characterized in that the pressure of the first gas stream is elevated using the gas jet compressor on the output pressure thereof to a value which is greater than or equal to the suction pressure of the mechanical compressor. 
     
     
         4 . The method according to  claim 1 , characterized in that the method is used in the production of a carbon monoxide product in which a synthesis gas predominantly consisting of hydrogen and carbon monoxide is fractionated in a cryogenic separation process, wherein a carbon monoxide-containing crude hydrogen stream and also at least one carbon monoxide stream which forms the second gas stream are obtained, and wherein the crude hydrogen stream are separated by pressure-swing adsorption into pure hydrogen and also a carbon monoxide-rich purge gas that is the first gas stream. 
     
     
         5 . A device for producing a gas product having an appliance comprising a mechanical compressor for combining a first gas stream and a second gas stream, wherein the first gas stream that is present at a lower output pressure than the second gas stream can be compressed in the mechanical compressor to the preset pressure of the gas product, characterized in that said device has a gas jet compressor arranged upstream of the mechanical compressor for elevating the pressure of the first gas stream, to which at least a part of the second gas stream is feedable as pumping medium. 
     
     
         6 . The device according to  claim 5 , comprising two or more parallel- and/or series-arranged gas jet compressors for elevating the pressure of the first gas stream. 
     
     
         7 . The device according to  claim 5 , comprising a gas fractionator having a cryogenic part in which at least one of the two gas streams having different pressures can be generated. 
     
     
         8 . The device according to  claim 7 , comprising a gas fractionator having a cryogenic part and also a pressure-swing adsorber, wherein a synthesis gas substantially consisting of hydrogen and carbon monoxide is fractionatable in the cryogenic part into at least one carbon monoxide stream having product purity, which forms the second gas stream, and a carbon monoxide-containing crude hydrogen stream, from which pure hydrogen and a carbon monoxide-rich purge gas, which is the first gas stream, can be generated in the pressure-swing adsorber. 
     
     
         9 . The device according to  claim 7 , characterized in that the cryogenic part of the gas fractionator can be cooled via a cooling circuit that is driven via the mechanical compressor.