Why should the cut-off valve at the feed inlet be located close to the feed pipe opening of the tower?
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As the title suggests, I would like to ask the experienced colleagues: why are the cut-off valves or control valve assemblies at the feed inlet of a distillation tower placed as close as possible to the tower’s feed pipe entrance (i.e., at the minimum distance)? Thank you!
This question isn’t absolute, right? It also depends on what type of medium is used in the distillation tower, right? For example, this setting is required for media with a low vaporization temperature, in order to prevent overpressure due to vaporization in the pipeline? Check if there are factors in this regard? ?
The medium is designed to be easily vaporized; after pressure reduction behind the control valve, it turns into a two-phase flow that can cause vibrations in the pipelines. Therefore, valves should be placed close to the equipment in such cases
There are two scenarios in which individuals encounter this: 1 is that the medium tends to polymerize, so it is placed close to the tower to minimize dead zones. 2 is for anti-freezing considerations.