Mixing assembly for gaseous flows at different temperatures, in particular for heterogeneous exothermic synthesis reactors

摘要

The present invention relates generally an apparatus for uniformly mixing gaseous flows at different temperatures. In particular, a preferred embodiment of the present invention relates to a heterogeneous exothermic synthesis reactor including a plurality of superimposed catalytic beds wherein at least one of the beds is provided with a gas permeable wall for outlet of a hot gas flow. In this embodiment, a baffle extends below and parallel to the gas permeable wall, thereby defining an air space to collect the hot gas flow. An annular opening is provided for outlet of the hot gas flow from the air space defined between the baffle and a side wall supporting the beds associated with the reactor and a perforated distributor for cooling a gas flow supported below said baffle at a predetermined distance from the annular opening. Further, the air space which collects the hot gas flow has a constant thickness in correspondence with the annular opening and the ratio of the width of the annular opening to the thickness of the air space is between 0.2 and 1.