What are the structural differences between a reboiler and a conventional shell-and-tube heat exchanger?
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1. What will be on the external connections of a siphon reboiler? 2. What are the differences in the internal structure? 3. What are the differences in the casing? 4. Can the liquid pressure in a siphon-type pipe be either negative or positive?
I think a reboiler is defined in terms of its function, just like we talk about heaters, reboilers, condensers, coolers, or intermediate heat exchangers; whereas a shell-and-tube heat exchanger is defined in terms of its structure, such as having tubes, plug-type designs, or plate types
A kettle-type reboiler has an additional evaporation space and overflow plate compared to a tubular heat exchanger; the other components are similar. It is not clear what the case is with vertical reboilers.
The baffle plates in the reboiler are longer than usual
Reboilers are generally used in conjunction with distillation columns, and are installed directly at the bottom of the column or outside it. The heating method can be jacketed, coil-type, or tube-type. The reboiler can achieve vapor-liquid equilibrium once again, equivalent to one theoretical tray. A reboiler is a special type of heat exchanger that can exchange heat while also providing a space for vaporization.
Do all reboilers have an inclined cone?
The reboiler supplies heat to the condenser at the top, while simultaneously carrying out its own gas-liquid separation. What a reboiler has in common with a shell-and-tube heat exchanger is that it also consists of tubes and a shell, and it is used for heat exchange or phase changes. However, in a condenser, cooling generally occurs after phase change; the material flows through the shell side, with baffle plates installed in between ； In a reboiler, the material flows through the tube side, while a certain liquid level is maintained in the kettle section to facilitate evaporation; there is also a relatively large space at the top for vaporization to take place.
Reply to 4# aassddffvv00: What is the reason why its distance is longer than that of other baffle plates?