Techniques and key points of the shift operation in the ammonia synthesis process (low-pressure shift)
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What are the key operational points for low-temperature shift in ammonia synthesis, and how can heat balance in the shift process be achieved? There is also the issue of how to ensure stable operation of the transformation process; how are the cold and hot bypass lines configured for low variations, and what are the criteria used in system design for these cold and hot bypass lines?
This post was last edited by Jiangbei Yan on 2021-12-2 at 14:55. This system is equipped with three low-pressure stages (2.1 MPa), and it uses the traditional process involving a reciprocating piston compressor with six compression stages. First, how is the temperature adjusted in stage 1 when there is no cooling bypass? How is the temperature control adjusted for the circuits of these reciprocating machines in this area? Second, how is it handled when the temperature keeps dropping? The current approach involves using a heating furnace for control when the temperature falls, and adjusting the cold water discharge from the compressor to raise the inlet temperature, but these measures don’t have a significant effect.