Roots blower positive and negative pressure pneumatic conveying difference between

The biggest characteristic of Roots blower is that when the pressure is adjusted within the allowable range, the flow rate changes little, and the pressure selection range is wide. The medium does not contain oil during transportation. It has the advantages of simple structure, convenient maintenance, long service life and small vibration. The following is to introduce the difference between positive pressure and negative pressure of Roots blower pneumatic conveying.

Pneumatic conveying roots blower can be divided into two forms: positive pressure pneumatic conveying and negative pressure pneumatic conveying. There are some differences in the use of the two. Let’s briefly understand the differences between the two and their advantages and disadvantages

1. The positive pressure conveying is the pressure feeding type

How to complete: complete the compressor section of the fan;

Pressure state: positive pressure, dust overflow;

Characteristics of conveying materials: one to multiple long distance, large flow transportation;

Feeding form: complex, when the conveying pressure is high, the feeding tank on the upper part of the feeder should be made into a closed structure;

Discharger requirements: simple;

2. Negative pressure conveying is suction type

How to complete: one side of the suction section of the fan is completed;

Pressure state: negative pressure, material and dust will not overflow;

Characteristics of conveying materials: from multiple places to one place, it is suitable for conveying materials with wide stacking surface or low depth, and the conveying capacity and distance are limited;

Feeding form: simple;

Requirements of unloader: high requirement for air tightness of dust remover;

Generally speaking, both of them can be used in the pneumatic conveying industry, and they have their own advantages and disadvantages. Therefore, the suitable roots blower can be selected according to the actual working conditions.