世界上在合成氨上使用离心压缩机是在1963年美国石油公司开始的。离心压缩机有一个最小的能够操作的气量,但是当设备容量降低,合成压力不能降低。图1表示设备规模与合成气排气压力的关系。图2表示1,000吨/日合成氨厂全部压缩机单位动力消耗和氨合成压力的关系。由于现在油膜密封的改进,合成压力已能达到300～350公斤/厘米~2。图3示出了离 The use of centrifugal compressors on synthetic ammonia in the world was started by American Petroleum in 1963. Centrifugal compressors have a minimum amount of gas that can be operated but when the capacity of the equipment is reduced, the resultant pressure can not be reduced. Figure 1 shows the relationship between equipment size and syngas discharge pressure. Figure 2 shows the relationship between unit compressor power consumption and ammonia synthesis pressure for a 1,000 ton / day ammonia plant. Due to the current oil film seal improvement, the synthesis pressure has been able to reach 300 ~ 350 kg / cm ~ 2. Figure 3 shows the distance