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气流烘干机的工作原理是怎么样的?

2020-01-31 来源:http://www.xiao456.com 发布人:众焱小编 浏览量:
[导读]:我们说过滚筒式木材烘干机工作原理。今天我们再了解烘干机设备家族中的另个一非常重要的成员——气流烘干机的工作原理。We talked about...
我们说过滚筒式木材烘干机工作原理。今天我们再了解烘干机设备家族中的另个一非常重要的成员——气流烘干机的工作原理。
We talked about the working principle of the drum type wood dryer. Today we will learn about the working principle of air dryer, another very important member of the dryer equipment family.
我们先来说一下气流式烘干机的分类:
Let's start with the classification of air dryer:
气流烘干机可以分为三类分别是直管式、旋风式和脉冲式。
Air dryer can be divided into three types: straight tube type, cyclone type and pulse type.
直管式气流烘干机
Straight tube air dryer
直管式是将湿料直接加入直立管中。空气经鼓风机进入到翅片加热器中。当达到一定的温度后,被送入到直立管中,在管内的速度要取决于颗粒的大小以及颗粒的密度。烘干完的原料被气流带出干燥机,送入到两个并联的分离器中,由分离器分离后进入到螺旋输送机中输送出来,产生的尾气经过袋式过滤器排出。
The straight pipe type is to directly add the wet material into the vertical pipe. Air enters the fin heater through the blower. When a certain temperature is reached, it is fed into a vertical tube. The velocity in the tube depends on the size and density of particles. The dried raw materials are taken out of the dryer by air flow and sent to two parallel separators. After separation by the separators, they are sent to the screw conveyor for transmission, and the generated tail gas is discharged through the bag filter.
旋风式烘干机
Cyclone dryer
木屑烘干机厂家
旋风烘干机的原理是热气流夹带着被干燥的颗粒状物料。以切线的方向进入到旋风干燥器内,沿热壁产生旋转运动,物料在其内一直处于悬浮旋转状态。从而完成干燥。当颗粒状物料与热壁产生碰撞的时候,也会发生粉碎的现象。从而增加的物料与热空气接触的表面积。从而产生更好的干燥效果。
The principle of the cyclone dryer is that hot air flow carries the dried granular materials. It enters into the cyclone dryer in the direction of tangent line and produces rotation movement along the hot wall, in which the material is suspended and rotated all the time. This completes the drying. When the granular materials collide with the hot wall, the phenomenon of comminution will also occur. Thus increasing the surface area of the material in contact with hot air. So as to produce better drying effect.
脉冲式烘干机
Pulse dryer
脉冲式干燥机采用的是管径循环缩小、扩大。使气流和颗粒作不等速流动,气流和颗粒间的相对速度与传热面积都较大,从而强化传热传质速率。此外,在扩大管中气流速度大大下降,也就相应地增加干燥时间。
Pulse dryer is used to reduce and expand the diameter of the circulation. The relative velocity and heat transfer area between the gas flow and the particles are large, so that the heat and mass transfer rate is enhanced. In addition, the air flow speed in the expanding tube is greatly reduced, and the drying time is correspondingly increased.
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