Apparatus for making and delivering sublimable pellets
US5249426A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1992 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Jun 2, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B32/55
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is an improved pelletizer and delivery system for hygroscopic and deliquescent materials, pellets being formed by a rotary extrusion mechanism that receives the material in the form of snow from a snow chamber, the system having a pair of scraper members for preventing undesired snow build-up on inside walls of the snow chamber, the scraper members operating in a scissors manner for preventing snow build-up on the scraper members. Carbon dioxide gas from the snow chamber can be used for pressurizing a pellet collector that is located under the extrusion mechanism for smoothly and gently feeding the pellets at least 15 feet horizontally to a receiving hopper, the gas pressure within the collector also enabling delivery of the pellets several feet above the bottom of the collector. The pellets can be delivered in excess of 150 feet horizontally from the collector. Also disclosed are a spring connected lid for preventing excess gas pressure in the snow chamber, and a static electrical discharge loop for preventing excessive snow build-up on a vortex flow horn of the chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.