合成氨装置离心压缩机改造经验

Experience in Revamping Centrifugal Compressors in Synthetic Ammonia Plant

介绍日产千吨合成氨装置增产50%的技改项目中 ,工艺空气压缩机和合成气压缩机的改造经验。并联一台电动多轴式离心式空压机 ,改造工作量小、风险小、投资省 ,比改造现有机组可节省数百万元人民币。合成气压缩机改内件或更换新的高低压缸 ,宜由两家制造厂报价确定 ,不宜由原制造厂独家承担 ,否则费用居高不下 ;压缩机效率提高 ,并改进合成工艺后 ,原汽轮机功率足够 ,不必改造。

In this paper, the experience in revamping the process air compressor and the synthetic gas compressor in the 1000 t / d ammonia plant for its technical modification project with a capacity increase of 50%was introduced. For the modification of process air compression, it is a method with less revamping work amount, less risk and less investment to add a parallel compressor that is a multi-shaft motor-driven centrifugal compressor than to modify the existing process air compressor unit, which can save millions of RMB. For the modification of synthetic gas compression, changing the internal parts or renewing the HP/LP casings of the synthetic-gas compressor should be quoted by the two manufacturers rather than only by the original manufacturer to avoid high price from a single offer. The existing steam turbines for the synthetic gas compressor unit do not need to revamp as their power is enough to drive after having increased the efficiency of the compressor and modified the synthetic process.