What a typical pneumatic dense phase conveying system looks like, showcasing ProPhase, from Schenck Process.
Dense phase pneumatic conveying is a process used in many bulk material handling industries. It allows for the movement of materials through pipelines from one silo to the next.
Using high pressure and low gas volumes, dense phase conveyors efficiently push material along the bottom of an enclosed pipeline, in a slug-like manner. This form of pneumatic conveying, in comparison to lean phase, ensures there is no degrading of material and as such, lower wear on the system.
Dense Phase Conveyors, using ProPhase:
The ProPhase system has been designed to have minimal moving parts, low wear, low maintenance, low attrition of material and high availability, and modular design for a quick supply.
Material movement
The material forms plugs naturally in the pipeline. Some materials form very long plugs, which can stop moving and have to be split, to keep the material flowing, while others form short plugs and move easily through the system. Schenck Process have studied thousands of materials and through experience and testing, are capable of engineering an optimal, economical method to dense phase convey material.
The material itself is held within vessels, silos or in the pipeline at all times, making the system environmentally sound and dust-free friendly. When the materials are considered to be dangerous, the pipeline can be made into a double skin unit with pressure monitoring, indicating if there is wear and allowing planned maintenance to occur.
Pumps and vessels
ProPhase can be provided with modular capabilities, for numerous handling modes, however there are two specific pumps shown as part of this system in the animation, for illustrative purposes only - the standard ProPhase Pump on the left, which is used for most materials and distances and later in the animation, the ProPhase Econ Pump. Whether it is modular design or pump specific, will dependant on the material being conveyed.
The ProPhase Econ Pump is shown on the right, towards the end of the animation. It is suitable for fine fluidisable materials over short distances up to 100m. It is a much simpler pump; it delivers simple high value with straightforward systems. Other pumps are available, material dependant.
The ProPhase pumps have minimal moving parts, the valves only, with no motors. The conveying velocities are the lowest at which the system is repeatedly reliable.
Dome valves
The key part of the Schenck Process dense phase conveying system are the ProDV Dome Valves. The ProDV Dome Valves were designed by our team in 1974 and are now used as the standard go to valve in the bulk material handling industry. The standard ProPhase Pump comes with an isolation valve for simple maintenance. Schenck Process are proudly the original designer, manufacturer of the Dome Valve, which has seen thousands of installations, worldwide. Other replicas now exist in the market; however, the ProDV Dome Valve from Schenck Process comes with a strong history of reliability.
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