Leak detection method for the bottom valve of polymerization reactors
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Method for detecting leakage in the bottom valve of a polymerization reactor: Currently, a certain amount of process water is added to the reactor; how can one determine whether there is internal leakage in the bottom valve?
Add water and apply pressure, maintaining it for a period of time to observe the pressure drop and leakage points
I have this question too. However, not all polymerization reactors can be tested with water; some materials cannot come into contact with water. Fortunately, our polymerization reactor has a vacuum system; if the vacuum cannot be established after sealing it, we will check each component individually, including the valve at the bottom of the reactor.
Reply to 2# wgqwcl: If there is internal leakage in the bottom valve, is the leak going into the pipeline, or is it not visible? It’s impossible to determine whether there is a leakage or not
We have never encountered this situation, because whether it is an internal leak or an external leak, vacuum pumping can detect it. Is it possible to apply pressure or create a vacuum inside the bottom valve and the pipes downstream?
Reply to 5# mickelfeng: It’s quite troublesome to apply pressure; additional pipes are needed. Is there a better way?
The common methods for leak detection are pressurization and depressurization; depending on the situation, liquids or gases can be used. If none of these are available, then it relies solely on experience, such as observing the liquid level or changes in flow rate in the pipeline behind the bottom valve.
Reply to 4# peerengineer_ge: Can’t the pipeline connected below the bottom valve be removed?
Reply to 8# wgqwcl: I now want to check whether the bottom valve is leaking every time material is fed in. It’s not possible to disconnect the pipelines behind it every time
Why does it need to be tested every time? Is it the quality of the valve that you can’t trust? Is it the special properties of the material that make it easy to damage the valves? If very strict sealing requirements are in place, it is recommended to purchase valves of reliable quality. If this is particularly important, it’s best to install online monitoring equipment so that the condition of the valves can be checked at any time.
Reply to 10# shmily327: It is basically produced using ABS, with styrene, acrylonitrile, and butadiene as raw materials. The product is in granular form; during unloading, it can easily cause blockages or sticking in the bottom valve of the tank, or result in poor sealing. Moreover, the raw materials are highly toxic, so it is necessary to check the condition of the bottom valve every time material is added