How to choose the air volume of a dehumidifier dryer? How to select the model?

Wind is the only medium that takes away the moisture in the raw material.

The amount of air volume will affect the quality of dehumidification effect.
The air volume is too large and the wind speed is too fast, resulting in too high return air temperature, resulting in overheating and affecting the stability of the dew point, poor drying effect, and a very large waste of resources in energy consumption.

If the air volume is too small, the moisture in the raw material cannot be completely taken away, which affects the drying speed. Only through professional judgment and calculation can we get a most suitable air volume value.

Simply from the following aspects, let you understand the calculation of the air volume through what angles. I hope it will be helpful to you when choosing a dryer.

1
  The type of material

2
  The output of the material

3
  Hopper size

1. The type of material

The air volume required to dry different materials is different.
For example:
To dry 1KG of ABS, the required dry air flow rate is about 1.3m³
To dry 1KG of PA material, the required dry air flow rate is about 2.1m³.

For different materials, the time required for drying air is also different.
For example:
Drying time: ABS takes about 2.5 hours.
Drying time: PA takes about 5 hours.
Prerequisites: The initial moisture content of the raw material is 0.3%, and the remaining moisture content is 0.1% after drying.


2.The output of the material

For the same material, the output requirements are different, and the required air volume is also different.
For example:
ABS material, the required drying capacity of 100KG per hour, the required drying air flow is: 130m³.
ABS material, the required drying capacity per hour is 200KG, the required drying air flow is: 260m³.

For PA material, the drying capacity is required to be 100KG per hour, and the required drying air flow rate is: 210m³.
For PA material, the drying capacity is required to be 200KG per hour, and the required drying air flow rate is: 420m³.


3. Barrel size

First of all, according to the general category of raw materials, drying requirements, and output, select the appropriate barrel.
Based on the hydrodynamic analysis, the minimum amount of dry air flow required to fill one barrel is then calculated.
Then select the appropriate fan air volume according to the actual air volume required by the material and the air volume required by the barrel, which can not only meet the actual air volume required by the raw materials, but also meet the air volume required by the barrel.

If you need more information about plastic drying research, please contact FACEBOOK:Jennifer Zhang

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