Shell & Tube heat exchanger

The structure of the tubular heat exchanger is simple, compact and cheap, but the outside of the tube can not be cleaned mechanically. The tubular heat exchanger bundle is connected to the tube plate, which is welded to both ends of the shell respectively, and is connected to the top cover. The top cover and the shell are provided with a fluid inlet and outlet pipe.

A series of baffles perpendicular to the tube bundle are usually arranged outside the tube. At the same time, the connection between tube and tubesheet and shell is rigid, while outside the tube are two kinds of fluid with different temperature. Therefore, when the temperature difference between the tube wall and the shell wall is large, due to the thermal expansion of the two are different, a large thermal stress is generated, so that the tube twists or loosens the tube from the tube plate, or even destroys the tubular heat exchanger

However, the compensation device (expansion joint) can only be used when the temperature difference between shell wall and tube wall is less than 60 ~ 70℃ and the fluid pressure in shell path is not high. When the pressure in shell passage exceeds 0.6mpa, other structures should be considered because the compensation ring is too thick and it is difficult to expand and lose the function of temperature compensation. MOC: SS 316, SS 304, SS 904L, SA 516 GR 60/70