Testing a new device for suppressing electrostatic charges on polymer granules

✍ Scribed by J. Taillet; Ph. Poidras; M. Glor; B. Maurer

• Book ID: 103967957
• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 704 KB
• Volume: 5
• Category: Article
• ISSN: 0950-4230
• DOI: 10.1016/0950-4230(92)80046-b

✦ Synopsis

Large discharges along the surface of the silo heap of polyethylene granules were reproducibly generated during filling of a 3 m diameter earthed metallic silo. The specific charge acquired by the granules during pneumatic transport was of the order of 2 WC kg-' and the mass flow rate of the granules was approximately 1 kg s-' (3.6 metric tons h-'). The rate of discharges depends on the height of the heap and varied from 4 to 8 dischargesmin-'.

By operating a three nozzle injector of bipolar ions in a carefully optimized arrangement at a short distance from the granules' entry port, all discharges were immediately suppressed.