The baffle rod heat exchanger replaces the original bow baffle with rod support, which has the advantages of anti vibration, high efficiency, and low pressure drop. Compared with the traditional baffle tube shell, it is assumed that there are significant changes in the internal structure of the 500 type heat exchanger found in the fixed tube plate heat exchanger type/standard based on the analysis of the factors affecting the pressure drop of the heat exchanger. A baffle grid composed of baffle rods is used as inter tube support inside the shell side, which not only greatly reduces the heat transfer dead zone but also significantly reduces the fluid resistance loss caused by repeated baffle flow in the shell side.

In the non heat transfer interface area, such as the local support between pipes, the shell side fluid has very small form resistance loss, and most of the fluid pressure drop can be used to promote fluid turbulence on the heat transfer interface, thereby obtaining a higher heat transfer film coefficient at low transport power. If a certain factory applies the same load of baffle rod heat exchanger and baffle plate heat exchanger, the pressure drop of the baffle rod heat exchanger is reduced to 50%, and the total heat transfer coefficient of the equipment is increased by 35% Therefore, at a certain Reynolds number, using a baffle rod heat exchanger instead of a traditional baffle plate heat exchanger has advantages.

The structure of shell and tube heat exchangers. Traditional shell and tube heat exchangers use bow shaped plate supports for the baffle plates. The setting of the bow shaped baffle increases the flow velocity and turbulence of the fluid in the shell side, and improves the heat transfer efficiency. However, the flow of fluid in the shell side is sometimes perpendicular to the tube bundle, and sometimes parallel to the tube bundle, thereby increasing the flow resistance of the fluid.