Brief introduction: Plate heat exchanger is a new type of high efficiency heat exchanger which is made of a series of corrugated metal sheets. A thin rectangular channel is formed between the plates, through which the heat exchange between liquid, liquid and vapor can be achieved. Advantages of plate heat exchangers compared with tube heat exchangers: 1. Efficient and energy-saving: its heat transfer coefficient is 3000-4500kcal/m2* h, which is 3-5 times higher than that of shell-and-tube heat exchangers. 2. Compact structure: plate heat exchanger with the same area and heat exchange is only 1/5 of shell and tube heat exchanger. 3. Easy to clean, easy to assemble and disassemble. 4. Long service life: Plate heat exchanger is pressed by stainless steel or titanium alloy plates, which can resist various corrosion media, and the rubber pad can be replaced at will. 5. Strong adaptability: Plate heat exchanger plate is an independent component, can be added or subtracted according to the requirements, can be applied to a variety of different, process requirements. 6. No liquid crossing: The sealing groove of the plate heat exchanger is equipped with a discharge channel, and all kinds of medium will not be in collusion.