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The composition and advantages of the fixed tube-plate heat exchanger
May 11, 2020

The fixed tube-plate heat exchanger is a kind of shell-and-tube heat exchanger. The tube plates at both ends of the fixed tube-plate heat exchanger are connected to the shell by welding, and are mainly composed of shells, tube plates, tube bundles, top covers (heads) and other components.

A

The advantages of fixed tube-plate heat exchangers are:

◆Simple structure;

◆In the same shell diameter, the number of exhaust pipes is the largest, and the bypass is the least;

◆Each heat exchange tube can be replaced, and the tube is easy to clean.

The disadvantages of fixed tube-plate heat exchangers are:

◆The shell side cannot be cleaned mechanically;

◆When the temperature difference between the heat exchange tube and the shell is large (greater than 50 ℃), the temperature difference stress will be generated. The solution is to set an expansion joint on the shell, so the shell side pressure cannot be too high due to the strength of the expansion joint;

◆It is only suitable for working occasions where the fluid is clean and not easy to scale, the temperature difference between the two fluids is not large or the temperature difference is large, but the shell pressure is not high.

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