Structure characteristics and manufacturing process of plate-fin heat exchanger
The characteristics of the plate-fin heat exchanger are: high heat transfer efficiency, compact structure, strong adaptability; complex manufacturing process and strict requirements; market value must ensure high manufacturing, research and development costs; due to structural constraints, its working pressure , The temperature is also limited; it is easy to block, not resistant to corrosion, and the working fluid is relatively clean. Due to the problems in the manufacturing of plate-fin heat exchangers such as fin molding, fixture mold design, solder and fiber formulation, fiber welding technology, cleaning and performance inspection, its development cannot be separated from the development of manufacturing technology. In the past ten or twenty years, countries around the world have continued to conduct research on various compact and efficient plate-fin surfaces to obtain fin performance data of different specifications and series and to develop new types of high-efficiency fins. Flow, uneven distribution, surface selection, optimized design, longitudinal heat conduction, head, deflector design, improvement of pressure resistance and expansion of application scope have been extensively and deeply studied. Plate-fin heat exchangers have broad application prospects and market potential. At present, they are not only widely used in petrochemical equipment such as air separation, ethylene production and ammonia synthesis, but also in natural gas liquefaction and separation, aviation, automobiles, diesel locomotives, hydrogen Quasi-liquefaction, refrigeration and air-conditioning also show huge application potential in equipment.
The manufacturing process of plate-fin heat exchanger has the following methods: non-welding bonding; salt bath brazing with flux in welding; solvent-free vacuum brazing and gas shielded brazing.