Fast fluidized bed boiler and a method of controlling such a boiler
US4538549A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1983 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Oct 14, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23J2217/20
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A completely cooled fast fluidized bed boiler comprises a reactor (4) having a bottom section (3), an integrated primary non-centrifugal mechanical particle separator (5), a gas pass (7) containing convective heat exchangers (10), and means (6,8,9) for controllably recirculating separated particles into the reactor bottom section (3). Reactor (4), separator (5) and gas pass (7) are built as an integrated unit within one and the same cooling system. The boiler is controlled by maintaining the bed temperature substantially constant or within a relatively narrow temperature interval by regulating the recirculation rate dependent on boiler load. For regulating the recirculation rate a non-mechanical valve, preferably a so-called L-valve (8), is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.