What are the working principles and main parameters of dilute phase pneumatic conveying and dense phase conveying?

There are two kinds of pneumatic conveying system in the choice of material conveying mode, which are dilute phase pneumatic conveying mode and dense phase pneumatic conveying mode. The characteristics of two kinds of conveying mode:

1. Dilute phase pneumatic conveying (sparse phase flow):

High air flow and low particle content. The mass flow ratio is approximately 0-15; for dilute phase transport, a relatively high transport air velocity must be maintained. Typical velocities for dilute phase systems are in the range of 5,000 feet per minute. to 8,000 feet per minute. However, this is not a constant speed; there is a pick-up speed at the beginning of the transfer, a terminal speed at the end, and acceleration throughout the length of the line.

2. Dense phase conveying:

The gas flow rate is low, the particle content is high, and the mass flow ratio is higher than 15.

The concentration of pneumatic particles relative to the gas in the pipeline is a very important indicator, called phase density or mass flow ratio, which is the ratio of particle volume to gas flow rate. Typical speeds for dense phase pneumatic conveying systems are in the range of 400 feet per minute. to 2,000 feet per minute. As with dilute phase pneumatic conveying, there is a lifting and terminal velocity at the beginning and end of the line, as well as the overall acceleration.

There are many configurations and factors to consider. Gas pin conveying, powder conveying.. In order to ensure the correct and effective design of the conveyor system, the choice of accessories is also essential.

The conveying mode of pneumatic conveying can be selected according to different applications. Usually dense phase pneumatic conveying is high pressure pneumatic conveying, while dilute phase pneumatic conveying belongs to low pressure pneumatic conveying. The conveying capacity of the former is larger than that of the latter, and the conveying distance is also longer.