Working principle of plate heat exchanger 

Working principle: the plate heat exchanger is a heat exchanger which is pressed by thin metal plate into a heat exchanger with a certain shape of ripple, then stacked and fastened with splint and bolt. A thin rectangular channel is formed between plates, and heat is exchanged through half pieces. The working fluid flows through a narrow and tortuous channel formed between two plates. The cold and hot fluid passes through the flow channel successively, and a partition plate is arranged in the middle to separate the fluid and heat transfer through the plate. The structure of the plate heat exchanger and the principle of heat transfer determine that the heat exchanger has the characteristics of compact structure, small area, high heat transfer efficiency, large operation flexibility, wide application range, small heat loss, convenient installation and cleaning.

The plate heat exchanger is a new type of high efficiency heat exchanger, which is made up of a series of metal sheets with a wavy shape. A thin rectangular channel is formed between plates, and heat exchange is performed through the sheet. Plate heat exchanger is an ideal equipment for heat exchange between liquid, liquid and steam. The utility model has the advantages of high heat exchange efficiency, small heat loss, compact and compact structure, small occupied area, convenient installation and cleaning, wide application and long service life. In the case of the same pressure loss, the heat transfer coefficient is 3-5 times higher than that of the tube type heat exchanger, and the area is 1/3 of the tube type heat exchanger, and the heat recovery rate can be as high as 90%.