Structural components of plate heat exchangers and their functions

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　　Plate heat exchangers feature a compact structure that makes them easy to assemble and disassemble; they have few components and high versatility, advantages that no other type of heat exchanger can match. The heat transfer capacity can be easily adjusted by simply increasing or decreasing the number of plates. It is applied in industrial fields such as mining, petroleum, metallurgy, chemicals, food, power, papermaking, pharmaceuticals, shipbuilding, and central heating. It can meet the requirements of processes such as cooling, heating, condensation, evaporation, disinfection, waste heat recovery, alcohol production, and sugar manufacturing; it is a highly efficient, energy-saving, compact, and widely applicable general-purpose heat exchange device. 　　Structure of plate heat exchangers and functions of their components 1. The fixed compression plates and movable compression plates are generally made of carbon steel sheets, with their thickness determined by the pressure-bearing capacity required to ensure that the plates are evenly compressed for proper sealing. 　　2. Upper guide rod: Fixed to the fixed pressing plate and the pillar; it serves to support and position the plate. 　　3. Lower guide rod: It serves to position the plate, and together with the upper guide rod, it ensures the proper positioning of the plate. 　　4. Clamping bolts: Arranged evenly around the pressing plate, they are used to clamp and secure the plate between the fixed pressing plate and the movable pressing plate. 　　5. Plates: These are the heat transfer elements, which are usually made of stainless steel as required. After being pressed together, a certain gap remains between the plates, forming fluid channels. The heat exchange medium enters and exits through the connections on the clamping plates, and then flows into the (odd or even) fluid channels between the plates, thereby enabling heat exchange. 　　6. The gasket ensures the sealing of the flow channels between the plates as well as the protection of the plates from external influences; the material used depends on the heat exchange medium. There are two seals around the corner port, along with a signal port that is in communication with the atmosphere, to ensure that the two media do not mix with each other.