Cascaded steam temperature control applied to a universal pressure boiler
US5279263A · kind A · utility
5Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1993 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Feb 5, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22G5/04
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The firing rate and the feedwater flow rate of a universal pressure boiler are controlled using a cascaded steam temperature control system. The secondary superheater outlet temperature comprises an outer loop for the control system, while the convection pass outlet temperature comprises an inner loop for the control system. Control variables for the system include the secondary superheater outlet temperature, the convection pass outlet temperature and the difference between the primary superheater outlet temperature and the secondary superheater inlet temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.