Are vertical thermosyphon reboilers equipped with valves or orifice plates on the inlet pipe?
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Fractional pressure drop across inlet valve: Specifies the fraction of the total (inlet piping + bundle + outlet piping) pressure drop that occurs in the inlet valve or orifice. Required: No. Units: None. Default: 0 (zero). If you enter a value for this field, the calculated pressure drop will increase by that amount. Inlet valves or orifices are used to prevent instability issues in tube-side thermosiphons. The last sentence mentioned above seems to conflict with the assumption that no valves should be used on the reboiler inlet piping; I would appreciate it if someone could clarify this for me. Thank you!
This is generally considered only during the design of process pipelines; based on experience, valves should be installed.
Generally, few fittings and valves are installed on the inlet pipes of reboilers, right?
This post was last edited by gn_1984 on 2015-12-2 at 15:04. So, won’t you have the boiler inspected or replaced? Adding valves can also facilitate maintenance. I haven’t actually carried out this process, so I’m not too sure; you can go to the process area and ask there. @*lihuagong @maning1984 @haiyangqh @jacques0920
I don’t understand! I’ve seen heat exchangers equipped with 2 MOVs at the outlet, used for switching pipelines and things like that. .
Adding a valve is a good idea; it facilitates maintenance and allows for shutdown in emergency situations. No orifice plate was seen.
Is that how you do it? Are there shut-off valves on both the inlet and outlet pipelines?
The main component is a valve, not a shut-off valve, used to prevent leaks in the pipe bundle.
It’s not part of the standard design; it’s added later. Once a leak in the tube bundle is detected (mainly to prevent leaks in the shell side), the valve is closed and the issue is addressed on a small scale. This approach is particularly useful when there is a large pressure difference across the shell side.
It saves the hassle and prevents the accident from escalating.
Even for small-scale treatment, everything has to stop, right?