What is pneumatic conveying?

What is pneumatic conveying?

In modern factories, transporting powder or granular materials from one place to another is a daily but important task. In addition to common belt conveyors and screw conveyors, there is also a type of "invisible transporter" - pneumatic conveying. It utilizes the power of compressed air to deliver materials to their destination like riding on an "air express truck".

However, to make this' air express' efficient and safe, pressure is a key parameter. This article will use a popular way to introduce the principles, applications, pressure requirements, losses, and optimization of pneumatic conveying.

What is pneumatic conveying? What can pneumatic conveying be used for?

Pneumatic conveying is the process of using air flow to "blow" or "suck" powder or granular materials. Its common forms include:
Positive pressure conveying: Air pushes the material forward from the front, like a blower blowing a ball.
Negative pressure conveying: Air is sucked in from behind to move materials, similar to the principle of a vacuum cleaner.
Hybrid conveying: combining "blowing" and "suction", suitable for more complex working conditions.
According to the amount of material in the airflow, it can also be divided into:
Dilute phase conveying: with less material and fast airflow, like dust dancing in the wind.
Dense phase conveying: There are many materials and slow airflow, like sand rolling in the wind.

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