Method for improving utilization of sulphur-absorbent when burning fuel in a fluidized bed and a power plant in which fuel is burned in a fluidized bed
US4872423A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1988 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Mar 22, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23C10/18
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method for improving utilization of sulphur-absorbent when burning fuel in a fluidized bed of particulate material includes withdrawing partially consumed bed material from the ash chamber of the bed vessel and returning to the combustion chamber of the bed by means of pneumatic transportion using steam as propellant. The steam constitutes a reactant which effects disintegration of the bed-material particles. A power plant burning a fuel in a fluidized bed of particulate material comprises a bed vessel having an air distributor with nozzles for supplying air to a combustion chamber to effect fluidization of the bed and combustion of a fuel. An ash chamber is provided below the air distributor for removal of ash and bed material, and transport means for withdrawing partially consumed bed material from the ash chamber, treating this bed material with steam and returning the steam-treated bed material to the combustion chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.