Abstract:Based on atomization mechanism of nozzle,the working principle of the spray dryer with traditional nozzle was analyzed.The influences of traditional national nozzle structure on product quality,energy consumption and production efficiency were researched.A low pressure atomization and large flow nozzle was designed.Through analysis and comparison of atomization effect,product quality,production efficiency and energy consumption,it is concluded that the new nozzle can improve product quality and productivity,save energy and reduce consumption,and it has broad application prospect.