The plate heat exchanger is a high-efficiency heat exchanger formed by stacking a series of metal plates with a certain corrugated shape. A thin rectangular channel is formed between the various plates to exchange heat through the plate. Plate heat exchanger is the ideal equipment for liquid-liquid, liquid-gas heat exchange. It has the characteristics of high heat transfer efficiency, small heat loss, compact structure, light weight, small footprint, wide application, and long service life. Under the same pressure loss condition, the heat transfer coefficient is 3-5 times higher than the tube heat exchanger, covers an area of one-third of the tube heat exchanger, and the heat recovery rate can be as high as more than 90%.
The main types of plate heat exchangers are frame type (detachable) and brazed type. The plate forms are mainly herringbone corrugated plates, horizontal straight corrugated plates and knob-shaped plates.