【Beginner’s question】What is polyethylene reactor runaway polymerization, and how to deal with it?
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Saw it in an article
Ethylene polymerization is an exothermic reaction; if heat removal for cooling is not carried out in a timely manner, the reaction becomes extremely intense instantaneously, and the powdered resin melts and fuses together to form a large mass of resin, weighing anywhere from dozens of kilograms to dozens of tons.
A large mass has formed throughout the entire reactor before
No pictures, no truth. Does this kind of thing happen often?
Gas-phase polyethylene production involves using reactors in almost every step of the process. Of course, operational experience has improved a lot compared to before, and it’s no longer as easy for lumps to form
It is said that it tends to occur during test drives?
In a localized area of the reactor, the reaction temperature rises sharply, and so does the reaction rate; the rate of the chain reaction becomes uncontrolled, leading to an explosion and polymerization explosion. The polymerization of all organic monomers into polymers is an exothermic reaction, and a small amount of initiator must be added to initiate the chain reaction of polymerization. If the added initiator cannot be dispersed quickly and the heat generated during polymerization cannot be dissipated rapidly, runaway polymerization will occur. Explosive polymerization is something that must be avoided and prevented during the polymerization process.
Driving, changing the catalyst type, switching to different catalysts, emergency shutdown, abnormal fluctuations in raw materials……
What is the difference between polyethylene caking and runaway polymerization? http://bbs.hcbbs.com/thread-724925-1-1.html (Source: Haichuan Chemical Industry Forum)