The stainless steel plate heat exchanger consists of a group of corrugated metal plates with holes in the metal plate, and heat transfer occurs between the two fluids passing through these holes. The plate assembly is installed between a frame plate and a pressure plate, and is tightened with tightening bolts.
(1) Small footprint. The stainless steel plate heat exchanger has a compact structure. The heat exchange area per unit volume is 2 to 5 times that of the shell and tube type. The stainless steel plate heat exchanger covers an area of about 1/5 to 1/8 of the shell and tube heat exchanger.
(2) It is easy to change the heat exchange area or flow combination. As long as the number of plates is increased or decreased, the purpose of increasing or decreasing the heat exchange area can be achieved. The heat transfer area of the shell and tube heat exchanger is almost impossible to increase.
(3) High heat transfer coefficient. Because the different corrugated plates are turned upside down to form a complex flow, which can generate turbulent flow at a low Reynolds number, the heat transfer coefficient is high, which is generally 3 to 5 times that of the tube and shell type.
(4) The plate of the plate heat exchanger is thin, and the pressure bearing capacity is low. Corrugated plates form heat exchangers with contact points supporting each other. If the compression size exceeds the installation size for a long time, it is easy to make the contact point into a pit, and then form a hole, so that the plate is scrapped.
(5) 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 medium for heat exchange. In the case of a sudden cut-off of the material, it is prone to steaming and coking, and the sealing gasket between the acceleration plates is damaged. Coking materials can block the cold material channel between the plates and affect the use of the equipment.
(6) The pressure loss per unit length is large. Since 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.