Double shell side U tube type.
U-shaped tube type is to bend the heat exchange tube into u-shape, and both ends of the tube are fixed on the same tube plate. Because the tube type can be expanded freely, there is no temperature difference stress between the shell and the tube. U-tube type is generally used under high temperature and high pressure, especially when the temperature difference between the shell and the metal wall of the tube is large.
-Working principle of shell and tube heat exchanger
For shell and tube heat type, a problem that is easily ignored is the vibration of tubes. And the vibration of tube bundle is often the destruction of tube
The main reason for the premature scrap of this type.
There are many and complex factors causing the vibration of tube. When the medium flow is close to the critical flow rate of resonance, the tube bundle will produce large vibration. In addition, local turbulence and eddy currents in the internal medium of heat exchanger will also cause vibration of heat exchange tube.
The vibration analysis of the tube bundle is to determine the vibration position and vibration properties of the heat exchange tube, to understand the cause of the vibration of the tube, so as to eliminate the vibration of the tube. There are many ways to eliminate the vibration of the tube. The natural frequency of the heat exchange tube bundle or the flow state of the fluid can be changed by changing the structure size , so as to eliminate the vibration . Or add local support plate to the vibration part of the to restrain the vibration of the tube.
If any question, please contact me
Contact: Ms.Rebecca
Eamil: rebecca @tranp.cn
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