The stainless steel plate heat exchanger is mainly composed of plates, sealing gaskets, fixed compression plates, movable compression plates, inlet and outlet flanges, clamping bolts, upper guide rods, lower guide rods, uprights and other components. What are the disadvantages of stainless steel plate heat exchangers?
(1) The heat exchanger plate is thin, and the pressure bearing capacity is low. Especially for the heat exchange that forms contact points between corrugated plates and supports each other, if they are used for a long time, and the compression size exceeds the installation size, it is easy to make the contact points into pits and form perforations to make the plates scrap.
(2) The distance between the plates is narrow, the liquid film is thin, and the evaporation speed is fast. If high-temperature steam and liquid materials are used as heat and cold media for heat exchange, steam drying and coking are likely to occur in the case of sudden flow interruption of the materials, and the sealing gasket between the acceleration plates is damaged.
Coking materials will cause the blockage of cold material channels between plates and affect the use of equipment. Therefore, employees' understanding of the structure and working principle of plate heat exchanger equipment is a difficult point in actual use.
(3) The pressure loss per unit length is large. Because the gap between the heat transfer surfaces is small and there are irregularities on the heat transfer surface, the pressure loss is greater than that of the conventional smooth tube.