What are the components that make up the structure of a plate heat exchanger?

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The structural composition of a plate heat exchanger is relatively simple; it mainly consists of components such as plates, gaskets, fixed compression plates, movable compression plates, guide rods, clamping studs and nuts, support columns, and intermediate partitions. The limited variety of its components and their high degree of versatility are unmatched by any other heat exchanger. 1. Plate: A metal sheet with corrugations, sealing grooves, and corner holes, which is an important heat transfer element. Ripples can not only enhance heat transfer but also increase the strength and stiffness of thin plates, thereby improving the pressure resistance of plate heat exchangers. They also promote turbulent flow of the fluid over the heat exchange surface, reducing the formation of deposits and fouling. 2. Gaskets: They surround the sealing plates to prevent fluid from leaking outward, and as per the design requirements, they seal certain corner openings so that hot and cold fluids can flow through their respective channels. 3. Fixed compression plate and movable compression plate: These are generally made of carbon steel plates or stainless steel plates, with the thickness determined by the required load-bearing capacity, in order to ensure even sealing and firm clamping of the heat exchange plates. The fixed compression plate remains stationary at the front end, while the movable compression plate is used in conjunction with it and can slide along the guide rod to facilitate installation, removal, and maintenance. 4. Guide rod: Fixed to the clamping plate and the pillar, used for supporting and positioning the plate. 5. Intermediate partition: The plate that divides a plate heat exchanger into two or more heat exchange sections. For heat exchange involving three or more fluids, the plate bundle on the same frame can be divided into two or several sections, with each section being used for heat exchange between two fluids. When only two fluids are in heat exchange, an intermediate partition is not required. 6. Clamping studs and nuts: Arranged evenly around the pressing plate, they are used to clamp and secure the plate located between the fixed pressing plate and the movable pressing plate. 7. Struts: These support the weight of the plate heat exchanger, helping to keep the entire heat exchanger together as a single unit. 8. End plates: In plate heat exchangers, these are plates that prevent the fluid from coming into contact with both the fixed and movable compression plates. 9. Nozzles and flanges (or only openings): Generally, 2 or 4 interfaces are provided at the corners of the fixed compression plate (sometimes on the movable compression plate or intermediate partition), and they connect with the corresponding corner openings in the plate to allow the heat exchange fluid to flow.