The US-based pneumatic conveying technology specialist Pelletron have recently announced their development for a new conveying process, trade named pellcon3, based on three major process components, namely Strandphase, Pellbows, and DeDuster. Objective of this process is to remove dust or angel hairs during plastic manufacturing/ compounding in an economical way.
Strandphase is a conveying technology for gentle conveying of granular products. According to the company, moderate velocities prevent breakage and attrition of the conveyed product, keeps the generation of dust at a very low level and prevents the creation of long angel hair. It does not need special pipe supports or additional steel construction. This system does not create fine micro-dust, seen in dense phase systems, or long streamers, created in dilute phase systems.
Pellbow is a patented pipe elbow. Its design resembles a standard short-radius elbow with a large expanded chamber between the inlet and discharge of the elbow. The company claims that the soft impact of pellets in the slurry zone and the low wall friction eliminates the creation of streamers.
Its pressure loss is reportedly only slightly higher than that of standard long- and short- radius elbows. The nature of the design eliminates the build-up of product within the elbow. A complete purge is accomplished simply by using the same conveying air volume and pressure.
DeDuster is a dust and angel hair removal unit. Friction is generated by velocity and pressure regardless of conveying method used. This results in attrition of the conveyed product. The unit removes dust particles providing resin with remaining dust contents below 30ppm.
Existing dense phase and dilute phase systems may be upgraded to incorporate pellcon3 technology.
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