A resins producer purchases a mobile dedusting unit for its truck-loading operation to ensure that its customers receive quality products.
RP Compounds GmbH, Schkopau, Germany, pneumatically conveys the resin pellets into large silos for storage and transfers them as needed into bags, octabins, or trucks for transport to the customers' facilities. To minimize the fine dust generated by friction during conveyance to the silos, the company uses dense-phase conveying systems for short distances and dilute-phase conveying systems with counter-flow elutriators installed on the silo tops for long distances. However, until recently the company had no way of controlling the dust generated by friction in the conveying systems and during silo discharge. This dust could exceed 400 parts per million (ppm) in the finished product, depending on the loading rate. Since the customer requires that the pellets it receives have less than 50 ppm of dust, the company needed to find a way to reduce the dust produced during the truck-loading process to acceptable levels.