INRICHTING VOOR HET VERKRIJGEN VAN DAMP DOOR WARMTEUITWISSELING BIJ DE BEREIDING VAN AMMONIAK.

摘要

A heat exchanger for the generation of steam in an ammonia synthesis plant comprises U-shaped gas conduits (7) for heat exchange between hot ammonia gas at high pressure in the conduits and water at high pressure around the conduits. The water is conducted through a water-steam chamber (9) which is separated by means of a plate (8) from a gas entry chamber (3) and a gas exit chamber (12) surrounding the entry chamber (3). The entry chamber for the entry of hot ammonia gas for the conduits is disposed at a spacing in front of the plate (8) and substantially centrally within the exit chamber (12). Inserted feed tubes (5), which are welded into bores, are provided for one end of each of the conduits welded into the plate. The entry and exit ends of the conduits are arranged alternatively in rows.