The DeDuster® for Various Industrial Applications
Pelletron provides DeDusters® for the plastics processing and plastics manufacturing industries, as well as for food, mineral, pharmaceutical, chemical and other applications.
DeDuster® Applications for the Plastics Processing Industry
Production of high quality end products requires clean plastic pellets. Dust and streamers in plastic pellets cause many problems for the plastics processing industry:
Common problems include:
- High “scrap” rates from fines burning in mold
- Blurry surfaces resulting from vaporized dust particles
- Weak spots in fibers
- Flaws in wire insulation
- Gels in films
- Housekeeping problems caused by dust and streamers
- Crusting of feed throat of screw
- Reduced mold and screw life resulting from carbonization of dust
- Mold vents clogged by dust
- Equipment and machines clogged by streamers
- Dust accumulation on silo walls, roofs and hopper walls
A DeDuster® can be installed directly on top of an injection molding machine or on a dryer, depending on the process requirements. The standard installation is a closed loop configuration with a fan and a dust collector. The removed dust is separated by the dust collector and dropped into a dust bucket and the cleaned air is returned to the DeDuster®. Special configurations for clean room applications are also available.
The use of regrind is also common in the plastics processing industry. Regrind is very dusty and needs to be cleaned before it is mixed with virgin pellets, before packaging into big bags or re-pelletizing.
Specifically for injection molding processes: The C-20 DeDuster®
DeDuster® Applications for the Plastics Manufacturing and Compounding Industry
Clean pellets, without dust or streamers, are the goal of every plastics manufacturing company. The most effective use of a DeDuster® is to position it under storage silos, for use before packaging. Installation at this position allows for the efficient removal of any dust and streamers that have accumulated in the silos, including the impurities created by dust surges.
Many existing pneumatic conveying systems are equipped with older technology dust removal systems, such as scalperators, aspirators and elutriators. These systems cannot provide the cleaning results required by modern manufacturing plants. For most applications, a Pelletron DeDuster® can be added under silos, before packaging, to improve the results. Pelletron has developed models that fit on bagging machines or can be moved between silos where a silo farm is in use. Because of its ability to remove the microfine, high electrostatically charged dust particles characteristic of dense phase systems, retrofitting existing systems with a DeDuster® has become common practice. The flow sheet below shows examples of various solutions for the installation of DeDuster® systems under silos.
DeDuster® Applications for other Industries
Pelletron has developed several solutions to address unique customer requirements. Besides the cleaning of plastic pellets, the DeDuster® can be used for cleaning dry bulk solids in the food, mineral and pharmaceutical industries. Some examples for materials that require cleaning are:
- Rice, corn, peanuts, coffee beans
- Iron ore, special sand, wood pellets
- Tablets, pills
- And many more…
Removal of dust is often necessary because of the environmental challenge it creates. Pelletron developed a special, wear-resistant DeDuster® for cleaning iron ore to address the health concerns associated with iron ore dust in the air and to save energy by reducing the dust that hinders the melting process.