| 摘要 |
Process and reactor for the preparation of ammonia at elev-ated pressure and temperature in an ammonia reactor, wherein a process stream of ammonia synthesis gas is suc-cessively passed through at least three catalyst beds with intermediate cooling of partially reacted synthesis gas leaving the catalyst beds by heat exchange in heat exchang-ers arranged between each catalyst bed. The process stream is obtained by combining prior to introduction into a first catalyst bed, a first feed stream of synthesis gas having been preheated through indirect heat exchange during the intermediate cooling of the partially converted synthesis gas and a second feed stream of synthesis gas for adjust-ment of temperature of the process stream. The first feed stream is passed successively through the interbed heat ex-changers for cooling the partially converted synthesis gas and space velocity of the synthesis gas is adjusted to be substantially in the same range in all catalyst beds. |
