Pneumatic conveying line equipment, the vacuum dense phase will present a fairly similar setup to the thin phase. However, to accommodate higher solids loads, resulting in higher pressure drops, vacuum pumps will be used instead of simple Roots blowers. This creates a very high vacuum. When conveying in dense phase, suppliers can use different technologies to achieve different conveying states of powder in the conveying pipe. Pneumatic conveying lines are affordable and welcome to purchase.
In a simple configuration, material flows of varying lengths will naturally occur. This can lead to some questions about pressure drop, as there may only be one long plug. To reduce this phenomenon, it is possible to force the creation of shorter material flows.
In the dense phase, the compression pressure of air must be higher than that of the lean phase. This can be done by installing a specific compressor, or simply using air from the factory's compressed air network. The pressures achieved range from 1 buck to several baggages. In order to introduce the powder into the delivery line, a number of tanks designed to withstand pressure are usually used. They are called pressure tanks or pressure sending hoppers.
It is done by pulsating a valve that allows air at the beginning or middle of the pipe. The disadvantage is that the air introduced into the pipeline will speed up the delivery of the product to the end point, which may be detrimental to the quality of the product.