A method of dismantling electronic components in waste PCBs resource treatment process is proposed. Air is used as the desoldering heating medium, and the process of desoldering is simulated by fluid software-Fluent. The factors of hot blast temperature and speed and the structure of nozzle are analyzed. Results show that the optimum hot blast temperature is 473 - 503 K and speed is about 7 m/s. Meanwhile, the structure of nozzle not only influences the heating efficiency, but also the temperature field distribution. Reasonable sizes of the nozzle are 9 mm in diameter, 20° -30° in angle of a, and 4 mm in height, when the distance from the nozzle to PCB is 30 mm.%针对废线路板资源化处理，采用结合拆卸元器件的回收方式，以空气作为熔焊加热介质，采用数值模拟的方式，以流体分析软件FLUENT为工具，研究了熔焊时热风温度、速度和喷嘴（即热风出口）的结构尺寸对加热效率和焊点附近温度场分布的影响．研究发现，最佳热风温度范围为200—230℃，最佳热风速度在7m／s左右；喷嘴结构尺寸对加热效率和焊点附近的温度场分布产生影响；喷嘴距线路板30mm时，合理的喷嘴尺寸为喷嘴上底直径D在9mm左右，喷嘴a角在20°～30°之间，喷嘴高度h在4mm左右．
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