Apparatus for preventing dust accumulation in exhaust duct of an electric furnace
US5394431A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1993 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Nov 3, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D17/304
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A smoke suction duct of an electric furnace is constructed as a separate member from other exhaust duct portions and other devices and is supported to be rotatable about an axis of the duct. Further, the smoke suction duct is either alternately turned to right and left or continuously turned in one direction by a duct turning device. Since accumulating dust is raised to an upper portion of the smoke suction duct where an exhaust gas flow has a high velocity due to rotation of the smoke suction duct and is pushed toward a combustion tower by the exhaust gas flow, dust is advantageously prevented from accumulating on a bottom of the smoke suction duct.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.