Different types of the tubular heat exchanger

Date:2018-11-24

According to the temperature difference compensation measures taken, the tubular heat exchanger can be divided into the following types.

1) Fixed tube plate type

The difference between the temperature of the shell and the heat transfer tube wall is greater than 50 ° C, plus a compensation ring, also called expansion joint, when there is a temperature difference between the shell and the tube bundle, relying on the elastic deformation of the compensation ring to adapt to the different thermal expansion between them .

Features: simple structure, low cost, difficult to repair and clean the shell, the shell must be clean, not easy to produce scale and corrosion.

2) Floating head

The tube sheets at both ends are not connected to the housing at one end and are free to float along the length of the tube. When the casing and the tube bundle cause thermal expansion due to temperature differences, the tube bundle together with the floating head can be freely expanded and contracted in the axial direction of the casing, and the thermal stress can be completely eliminated.

Features: The structure is more complicated, the cost is high, and the temperature difference stress is eliminated. It is a structural form with more applications.

3) U-tube type

The tube sheets at both ends are not connected to the housing at one end and are free to float along the length of the tube. When the casing and the tube bundle cause thermal expansion due to temperature differences, the tube bundle together with the floating head can be freely expanded and contracted in the axial direction of the casing, and the thermal stress can be completely eliminated.

Features: The structure is more complicated, the cost is high, and the temperature difference stress is eliminated. It is a structural form with more applications.

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