Problems with the floating head design of kettle reboilers
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I’m a newcomer to chemical engineering equipment{:1_90:} and am currently working on my graduation project, which requires the design of a floating-head batch reboiler. GB151 does not provide design methods for the floating head of batch reboilers; however, when designing the floating head using the methods applicable to floating-head heat exchangers, it ends up being too large and conflicts with the shell. I hope that experienced forum users can advise me on how to design the floating head portion
Bolt holes (or through-holes) can be drilled on the front side of the floating tube sheet, so that the outer diameter of the floating head cover (flange) is the same as that of the floating tube sheet.
Why is it designed as a floating head? The common type is the U-tube type.
This is the topic for someone’s graduation project, so of course it can’t be decided by the designer.
Thank you for your answer. May I ask how the other dimensions of the floating head flange should be determined? Are there any relevant standards?
Refer to GB/T151-2014 P52~P55 for standards.
I would also like to ask: for the floating head flange I designed in accordance with GB/T151, how should the inner diameter of the flange be determined? If the outer diameter is taken as the diameter of the floating flange plate, and the inner diameter is designed using the formula Dfi=Di-2(b1+b2)+3, won’t the flange wall thickness become too thin? (Unable to release the bolt) Solve.
During calculation, it is assumed that the tube and shell sides have the same diameter; that is, the shell side diameter is based on the inner diameter of the tube side.
The position of the floating head flange is generally one size larger than the nominal diameter; for example, in a floating head heat exchanger with a nominal diameter of DN600 mm, the inner diameter at the location of the floating head flange is 700 mm.