Burner isolation valve for pulverized fuel systems
US6260490A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2000 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Feb 16, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23K2203/10
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A burner isolation valve or gate for use in the coal-delivery pipes of coal-fired power plants. Safety regulations often require that two valves be placed in the coal delivery line between a combustion chamber and an exhauster or pulverizer type deliver source to isolate the section of pipe in between for maintenance and other access. The invention includes a novel valve plate and actuation assembly, a novel housing adapted to sealingly enclose the valve plate, and a novel sealing mechanism for the valve plate and housing adapted to keep coal fines and dust out of the outboard portion of the housing in which the valve plate rests in the valve-open position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.