U-tube heat exchanger It is a kind of shell and tube heat exchanger, belonging to petrochemical equipment. It is composed of main parts such as tube box, shell and tube bundle. It is named because its heat exchange tube is U-shaped. The U-tube heat exchanger has only one tube sheet, and both ends of the tube are fixed on the same tube sheet.

Structural performance:

This type of heat exchanger is characterized by free expansion of the tube bundle, no thermal stress due to the temperature difference between the tubes and shells, and good thermal compensation performance; The tube side is a double tube side, with a long process, high flow rate and good heat transfer performance; Strong pressure bearing capacity; The tube bundle can be extracted from the shell, which is convenient for maintenance and cleaning, and has simple structure and low cost. However, it is inconvenient to clean the inside of the tube, and it is difficult to replace the tube in the middle of the tube bundle. Also, because the bending radius of the inner tube cannot be too small, and the tube layout in the central part of the tube sheet is not compact, the number of tubes cannot be too many, and there is a gap in the central part of the tube bundle, which makes the shell side fluid easy to short-circuit and affects the shell side heat transfer. In addition, in order to make up for the thinning of pipe wall after bending, the straight pipe part needs to use pipes with thicker walls. This affects its application occasions. It is only suitable for cases where there is a large difference in the wall temperature of the tube and shell, or the shell side medium is easy to scale, but the tube side medium is clean and not easy to scale, with high temperature, high pressure and strong corrosivity.