Steam generation in steam reforming processes

The procedure for the production of water steams having different purity in steam reforming process, in which two steam reformers (DR1, DR2) are operated parallelly, comprises producing a pure steam (4) in one of the steam reformers by evaporation of degassed and demineralized water (clean water), and producing a dirty steam in other steam reformer by evaporation of degassed water containing impurities (dirty water). The pure steam is divided into a first pure steam flow (export steam) and a second pure steam flow (make-up steam). The procedure for the production of water steams having different purity in steam reforming process, in which two steam reformers (DR1, DR2) are operated parallelly, comprises producing a pure steam (4) in one of the steam reformers by evaporation of degassed and demineralized water (clean water), and producing a dirty steam in other steam reformer by evaporation of degassed water containing impurities (dirty water). The pure steam is divided into a first pure steam flow (export steam) and a second pure steam flow (make-up steam). The export steam is brought to use outside of the steam reforming process, while the make-up steam is used completely within the reformers. The make-up steam is used as a process steam in the steam reforming process and is mixed with the dirty steam and is fed as a process steam to the steam reformer used for the production of pure steam. The dirty water is produced from the pure water containing process condensate. A part of the dirty steam produced in the reformer is brought to use outside of the steam reforming process. The dirty steam and pure steam are produced with same or different pressures. An independent claim is included for a device for the production of water steams having different purity. Die Erfindung betrifft ein Verfahren zur Erzeugung von wenigstens zwei, unterschiedliche Reinheiten aufweisenden Arten von Wasserdampf in Dampfreformierungsprozessen, in welchen zumindest zwei Dampfreformierungseinrichtungen (Dampfreformer) (DR1, DR2) parallel betrieben werden, wobei die erste Wasserdampfart (Reindampf) (4) eine höhere Reinheit aufweist als die zweite Wasserdampfart (Schmutzdampf) (11), sowie eine Vorrichtung zur Durchführung des Verfahrens. Die parallel betriebenen Dampfreformer werden zu Gruppen von wenigstens zwei Dampfreformern (Gruppen) (DR1, DR2) zusammengefasst, innerhalb der die gesamte erzeugte Reindampfmenge (4) in einem der Dampfreformer (DR1) durch ausschließliche Verdampfung