CAJ | 학술논문

设计了一种滚筒式真空脉动干燥机.该干燥机由干燥滚筒、旋转接头、加热系统、控制系统、真空系统和传动系统组成.控制系统通过控制电磁阀可使干燥滚筒内的干燥压力在真空与常压之间有规律地变化.干燥滚筒在增加装料量的同时,还可通过旋转使物料受热均匀,提高机器的生产率.无核白鸡心葡萄的干燥试验表明,在干燥压力为7kPa,一个循环内真空干燥20min,常压干燥4min,干燥温度为60℃的条件下,干燥12h,葡萄含水率可降至16.4%(湿基),糖酸比达到33.2.
설계료일충곤통식진공맥동간조궤.해간조궤유간조곤통、선전접두、가열계통、공제계통、진공계통화전동계통조성.공제계통통과공제전자벌가사간조곤통내적간조압력재진공여상압지간유규률지변화.간조곤통재증가장료량적동시,환가통과선전사물료수열균균,제고궤기적생산솔.무핵백계심포도적간조시험표명,재간조압력위7kPa,일개순배내진공간조20min,상압간조4min,간조온도위60℃적조건하,간조12h,포도함수솔가강지16.4%(습기),당산비체도33.2.
A pulsed vacuum drum dryer was designed.This machine consisted of a drying drum, heat system, rotary joint, control system, vacuum system and drive system.The pressure in the drying drum can be changed between vacuum and atmospheric pressure by opening or closing an electromagnetic valve.The drying drum can increase the load of materials, and at the same time can make heating more uniform by rolling.So, the efficiency of the machine can be increased.The experimental results of centennial seedless drying demonstrated that the machine could produce raisins with moisture content of 16.4% (w.b.) and acid-sugar ratio of 33.2 in 12h.when the pressure was 7kPa, vacuum drying was 20min and atmospheric drying was 4min for one cycle, drying temperature was 60℃.