What is the purpose of sealing a synthesis tower? How to seal the tower?
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Our plant uses the ammonia synthesis process produced by Hunan Anchun Company. There is a large valve before the cold gas enters the heat exchanger, and another large valve after the hot gas exits the heat exchanger. When the plant is shut down for two to three days, we close these two large valves, as well as the cold air supplies at the zero-meter level, between layers, and in the gaps around the equipment. Is this done mainly to seal the tower? What is the main purpose of sealing a tower? Just to protect the coal contactor? To be honest, those two techniques are extremely difficult to master; they require a lot of effort, and the value of observing them isn’t very great either. How did you do it? What are you thinking?
Yes, it’s the so-called tower sealing operation. The advantage is that it reduces the startup time and energy consumption when the system is restarted; after all, if the synthesis tower is cooled to room temperature after parking, restarting it will require more time and more material consumption. The advantage of doing this is that the process conditions and energy of the synthesis tower are preserved as much as possible, so no waste occurs when starting up the equipment again! ! !
Sealing the tower is primarily to prevent air from entering it, which could cause a rise in temperature and lead to passivation.