| 摘要 |
Converters for heterogeneous synthesis and more particularly for ammonia, methanol and higher alcohols catalytic synthesis, which consist of an internal cartridge involving a non-perforated external wall, forming an interspace with the shell internal wall, of n catalytic beds, each formed by granular catalyst arranged between closed bottom and a top open surface, or between bottom and cover both closed, and two cylindrical, concentric, perforated walls, of means for adduction of the reaction gases, of means for extraction of reacted gases, of heat exchangers lined up axially at the center of the catalytic beds, which consist of tube-bundles, and of means for adduction to said tube-bundles of feed gas for heat exchange, are now characterized by:… - n adduction means of feed gas for heat exchange, n-1 of which centrally flow through each catalytic bed,… - means to lead the reaction gas flowing from top to bottom in the interspace between shell and cartridge, by making it pass externally to the tube-bundle of at least one lower heat exchanger, which is internally passed by the reacted gases directed to the converter outlet and by making said reaction gas pass internally to the tube-bundles of the other heat exchangers on its way back to the converter top and… - means to mix at the top of each exchanger said reaction gas and said exchange gases. |
