旋转闪蒸干燥机的改进

Improvement and innovation of spin flash dryer

针对传统结构的旋转闪蒸干燥机的粉碎室内胆和粉碎刀片所存在的欠缺进行改进优化,提高机器的工效,降低能耗。通过对物料在传统结构旋转闪蒸干燥机内部运动机理的研究发现:物料在圆筒形的粉碎室内随气流作圆周运动时,其运动速度、方向与粉碎刀的旋转速度、方向较为接近,粉碎工效不高;物料在带有刮板的垂直板式结构的粉碎刀作用下易沿切向击中筒壁,加大黏壁程度,并且粉碎刀的旋转对气流无辅助作用。如把圆筒形粉碎内胆改为多边形粉碎内胆,使物料在撞击作用下改变飞行方向,增加与粉碎刀的接触次数,可以提高工效;同时把粉碎刀改为带斜角的风扇形刀组,促进热气流的上升运动,可以加强物料的干燥、粉碎和上升,减少物料的黏壁。

The essay optimizes barriers of the crush tank and crushing blade of the traditional machinery of spin flash dryer, improves effi- ciency and reduces energy consuming. Through the research of inter- nal motion theory of the traditional spin flash dryer, two questions can be found： first, when material moving circularly in the columnar crushing chamber by airflow, the moving speed, direction of the ma- terial and crushing knife are quite close which make crushing efficien- cy not high~ second, material is very easy to hit cylinder wall along tangential by the crushing knife with flighter in vertical plate struc- ture and increase the extent of wall sticking, so that spinning of the crushing knife have no booster action to airflow. Through investiga- tions, if the columnar crushing tank can be altered into polygonal, material can alter its flying direction through knock-on effects and in- crease frequency of exposure with crushing knife, so that working ef- ficiency can be boosted. At the same time, if the crushing knife can be altered into fan shaped knife tackle with oblique angle, the as- cending motion of thermal current will be prompted and it will ad- vance drying, crushing and ascending of material so that wall-stick- ing phenomenon of material can be improved.