Plate heat exchangers are ideal equipment for liquid-liquid and liquid-vapor heat exchange. It has the characteristics of high heat exchange efficiency, low heat loss, compact and lightweight structure, small footprint, wide application and long service life. Under the same pressure loss, the heat transfer coefficient is 3-5 times higher than that of the tube heat exchanger, the floor area is one-third of the tube heat exchanger, and the heat recovery rate can be as high as 90%.Plate heat exchanger plates are also called heat transfer fins, which are one of the core components of plate heat exchangers. Because the plates are stamped and formed by a 10,000-ton press. If the stamping error is too large, it will directly affect the sealing performance and heat exchange efficiency of the plate changer. So what is the basic structure of the heat exchanger plate?
(1) Plate heat exchangers generally use water as the cooling medium, and most of the plates are made of thin stainless steel (stainless steel is usually 304 and 316L, thickness 0.4mm, 0.5mm and 0.6mm). According to the specific mold, different corrugations and groove depths are formed by stamping, which is used to distinguish the model and the plate type combination for medium heat exchange.
(2) There will be a space flow channel between the plates, which we call the plate spacing. The cold and hot fluids move on both sides of the plates and pass through the heat exchanger plates to generate cold and heat exchange.
(3) Since the plate is pressed by stainless steel, its thickness is only 0.5mm. The cold and hot media are in a countercurrent state, so the K value of the plate changer can reach 3000-6000W/m²℃.