During normal operation, the rising steam has a certain speed when passing through the small hole, which can hold the liquid on the fractionating tower tray and prevent the liquid from leaking from the small hole, but can only flow along the tray, and then flow to the next tray through the overflow bucket. After shutdown, due to the interruption of rising steam, the liquid on the tray loses the supporting force of rising steam, and is left to the bottom successively from the sieve holes of each tray and stored in the condensation evaporator and liquid kettle. Therefore, during temporary shutdown, liquid oxygen and liquid air level will rise, even exceeding the position of expansion air and oxygen outlet pipe orifice, which is easy to cause liquid carrying accident of expander or cold end of switching heat exchanger during restart. Therefore, pay attention to the position of liquid level during temporary shutdown, and discharge some liquid if necessary.
Intelligent manufacturing is not an optional path, but an inevitable path, an inevitable trend of manufacturing development, and an inevitable direction of meeting social needs. The traditional production mode cannot be solved and the previous technical means cannot support it. Intelligent manufacturing needs a technical system support. In order to build its own intelligent production line and attract high-end talents, DEAR Air Separation has established an intelligent team with doctors as its members to make bold innovation and improvement on the manufacturing process of existing air separation equipment, realizing a leap in intelligent automation of air separation manufacturing.
