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气流烘干机的工作原理

2019-11-18 来源:http://www.zhongyanjixie.com 发布人:admin 浏览量:
[导读]:  我们讨论了鼓式木材干燥机的工作原理。今天我们来看看烘干机的工作原理,烘干机家族的另一个重要成员。  We discussed the workin
  我们讨论了鼓式木材干燥机的工作原理。今天我们来看看烘干机的工作原理,烘干机家族的另一个重要成员。
  We discussed the working principle of drum wood dryer. Today let's look at how the dryer works, another important member of the dryer family.
  让我们从空气干燥机的分类开始:
  Let's start with the classification of air dryers:
  空气干燥器可分为三类:直管式、旋风式和脉冲式。
  Air dryer can be divided into three types: straight tube type, cyclone type and pulse type.
  直管空气干燥器
  Straight tube air dryer
  直管是将湿料直接送入垂直管中。空气通过鼓风机进入翅片加热器。当达到一定的温度时,颗粒被送入直立管的速度取决于颗粒的大小和密度。干燥的原料通过气流从干燥机中取出,送到两个平行的分离器中。原料从分离器中分离出来,输送到螺旋输送机,产生的废气通过布袋过滤器排出。
  Straight pipe is to send wet material directly into the vertical pipe. Air enters the fin heater through the blower. When a certain temperature is reached, the speed at which particles are fed into the vertical tube depends on the size and density of the particles. The dried raw materials are taken out of the dryer by air flow and sent to two parallel separators. The raw materials are separated from the separator and transported to the screw conveyor. The waste gas is discharged through the bag filter.
  旋风干燥机
  Cyclone dryer
气流烘干机的工作原理
  旋风干燥机的工作原理是干燥粒状物料时所夹带的热气流。沿切线方向进入旋流干燥器,沿热壁产生旋转运动,物料在热壁中始终处于悬浮和旋转状态。所以它是干燥的。当颗粒物质与热壁发生碰撞时,也会发生粉碎现象。从而增加了与热空气接触的材料的表面积。这样可以更好地干燥。
  The working principle of the cyclone dryer is the hot air flow carried in drying granular materials. It enters into the cyclone dryer along the tangent direction and produces rotation movement along the hot wall. The material is always in suspension and rotation state in the hot wall. So it's dry. When the particles collide with the hot wall, they will also be crushed. This increases the surface area of the material in contact with hot air. This allows for better drying.
  脉冲式干燥机
  Pulse dryer
  脉冲干燥机是用来减小循环、膨胀的直径。当气流和颗粒以不同速度流动时,气流与颗粒之间的相对速度和传热面积较大,从而提高了传热传质率。此外,膨胀管内的气流速度大大降低,相应增加了干燥时间。
  Pulse dryer is used to reduce the diameter of circulation and expansion. When the gas flow and particles flow at different speeds, the relative velocity and heat transfer area between the gas flow and particles are larger, thus improving the heat and mass transfer rate. In addition, the air velocity in the expansion tube is greatly reduced, and the drying time is correspondingly increased.
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