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Heat exchanger analysis-what is the structure of the plate heat exchanger

Views:2     Author:Site Editor     Publish Time: 2021-04-30      Origin:Site

The plate heat exchanger is small in size, high in heat exchange efficiency, and has a small footprint. Of course, its structure is relatively simple compared to plate-fin heat exchangers, shell-and-tube heat exchangers and tube-and-tube heat exchangers.china steel heat exchanger - GUPHE

Heat exchanger analysis-what is the structure of the plate heat exchanger

It is mainly composed of a series of components such as plates, sealing gaskets, fixed compression plates, movable compression plates, compression studs and nuts, upper and lower guide rods, and front pillars.

The plate is the core element of heat transfer, the gasket is the sealing element, some gaskets are hung in the gasket groove of the plate, some gaskets are buckled in the groove, and some are pasted in the gasket groove of the plate .

The plates with the gasket installed are placed between the fixed compression plate and the movable compression plate in a certain order (the cold and warm plates are placed crosswise), and the fixed compression plate, the plate and the movable compression plate are compressed with a compression stud. Board clamping. The compression plate, the upper guide rod, the lower guide rod, the compression device, and the front pillar are collectively referred to as the frame of the plate heat exchanger.

All plates arranged according to a certain rule are called plate bundles or plate groups. After pressing, the contacts of adjacent plates are in contact with each other, so that a certain gap is maintained between the plates to form a fluid channel.

Heat exchanger analysis-what is the structure of the plate heat exchanger

The heat exchange medium enters and exits from the connecting pipes on the fixed compression plate and the movable compression plate, and enters the fluid channel between the corresponding plates for heat exchange to realize the heating of the cold medium or the cooling of the heat medium.

The principle of the detachable plate heat exchanger is to install a movable pulley and a top pressure device at the upper guide rod. When adding or reducing plates, the number of plates that can be installed in the heat exchanger can be adjusted through the pulley, and the top pressure The device reinforces the firmness of the overall structure.

For some small plate heat exchangers, there is no such device. Instead, the fixed compression plate and the movable compression plate are directly connected by a guide rod.

This structure has no cleaning space, and the plates cannot be hung on the guide rods during cleaning and inspection. Although this structure is light and simple, it is not suitable for large-scale plate heat exchangers that need to be cleaned frequently.

For plate heat exchangers that need to exchange heat with more than two media, intermediate partitions are required.

Heat exchanger analysis-what is the structure of the plate heat exchanger

In the pasteurizer for dairy processing, in order to increase the residence time of the dairy products at the sterilization temperature, it is usually necessary to install a delay plate at a specific position of the sterilizer.

In order to save floor space, some companies will adopt a double-frame structure. The structure has two forms. The first is to share an overhaul space, with a fixed compression plate on the left and right, and two movable compression plates in the middle.

The second type is to share the fixed pressing plate in the middle, with one movable pressing plate on the left and right. The double frame structure can be regarded as two plate heat exchangers installed together.


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