Exhaust system for steel-making plant
US3976454A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1975 |
| Grant date | Aug 24, 1976 |
| Priority date | — |
| Expiry date | Feb 19, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Dust-laden waste gases from a converter and from ancillary equipment are exhausted by respective blowers through a first and a second duct to a main and a secondary scrubbing station whence the purified gases escape through respective chimneys. The first duct is provided with two cascaded washing stages, the upstream stage being operable to throttle or block the flow of gases therethrough. An annular cowl for the interception of peripherally escaping converter gases is connected to a third duct which joins the first duct at a location between the two washing stages but is also connectable through a switching valve to the second duct. The switching valve is open in the blowing phase of the converter while a movable insert at the upstream washing stage unblocks the first duct; in the charging phase, the switching valve is closed and the insert at the upstream stage obstructs the first duct as the gases picked up by the cowl are drawn through the third duct and the downstream washing stage of the first duct for discharge through the chimney of the main scrubbing station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.