I would like to ask how to calculate the rear tube sheet and the flanged convex head of the AKT kettle-type heat exchanger
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As the title suggests, I have just designed a kettle-type reboiler for AKT, and a hook-and-loop type floating head has not been used. Could someone please tell me how to calculate the rear tube sheet and the flanged convex head? reward_7ree
I haven’t done it; I actually don’t know how to do it either. Please ask someone to explain their approach. @gjyzb @huandong @HSLJHZ @SDHZZXM @FORREST_GUMP
I haven’t done this either, so I can’t say. My idea is: 1. The fixed-end tube sheet should be calculated according to the standards, with the calculation pressure taken as the highest value among ps/pt/ps-pt ； The floating end tube sheet does not require calculation; the thickness of the fixed end tube sheet can be used directly ； 2. Regardless of whether the end flange has loops or not, the mechanical model of the flange should remain the same; therefore, standard calculations can be applied directly. When there is negative pressure on the shell side, the calculated pressure should be pt-ps. Differing opinions are welcome.
I agree with the opinion above. Instead of a hook-type floating head, a removable floating head should be used. There is no need to calculate the thickness of the floating end tube sheet; simply use the thickness of the fixed end tube sheet.
I have never worked with this format before; I think its structure should be something like this: the floating gasket plate without hooks has a larger diameter than one with hooks, so that it can also serve as a flange for connecting to the floating head flange. And so the result is clear: first of all, the thickness of the floating tube sheet must be no less than that of the fixed tube sheet ； Then, the floating tube sheet, which also serves as the tube sheet portion, meets the requirements for flange connection strength and stiffness ； Finally, in addition to meeting strength requirements, the thickness of the floating head flange must also satisfy the requirements regarding flow area.
The opinions expressed by those upstairs are great. I’m currently carrying out the design calculations, and once it’s done, I’ll post the drawings at some point so everyone can take a look.
I have never worked on this type of structure; I’m looking forward to experts’ guidance...