What is the purpose of installing a return line in a heat exchanger?
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What is the purpose of installing a return line in a heat exchanger?
Reply to 1# chk19900318: Same question. But I think it might be for pressure control? I’m not sure if the answer is correct
I don’t understand! Backflow? ! Bypass again? !
Please draw a simple diagram to illustrate it. Are you referring to a bypass or a return flow?
Generally, a heat exchanger consists of inlets and outlets for the cold/hot medium, resulting in a total of 4 flow paths. Reboilers in towers and reactors have a quenching drainage system to cool the material during shutdowns； A pressure equalization line is sometimes installed at the inlet of the tower top condenser to ensure smooth flow of the cooled material into the tower top receiver tank ； In upright heat exchangers where phase-transition polymerization is likely to occur, a jet flow system is installed to prevent polymerization in the heat exchanger.
You should be referring to the vapor equilibrium line. It is to maintain stable pressures inside the tower and in the reflux tank, so that the condensed material can flow down smoothly
There’s no return pipe on the heat exchanger, right? I know there’s a bypass to regulate the heat exchange temperature!
I don’t understand this question. The poster is adding more images.
It's better to have pictures to talk about it. A lot was said on the 5th floor. Some vacuum distillation units also have \"return pipes\" in their heat exchangers; these are used to maintain pressure balance during vacuum operation, so that the liquid after heat exchange can flow. If there are only liquid flow channels, a large pressure difference would prevent the liquid from flowing. Let’s send a picture so everyone doesn’t have to guess.