Method and a device for preheating a fluidized bed
US5347936A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1992 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Mar 11, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23C2900/99006
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method and a device for preheating a particulate fluidized bed which is supplied with air for fluidization of bed material and for combustion of main fuel through gas paths that include fluidization members for injection and distribution of the air over the fluidized bed. The bed material is preheated to the ignition temperature for the main fuel used in the fluidized bed by members arranged in the gas paths for combustion of starting fuel. These members are designed and arranged so that the air is supplied to the fluidized bed along the same path through gas paths and fluidization members upon preheating with starting fuel as upon combustion of main fuel in the fluidized bed. The members for combustion of starting fuel are arranged in the fluidization members and comprise fuel injectors, fuel pipes, ignition members and control members. Around or upstream of the fuel injectors, flow-directing members are arranged to split up the air flow into a turbulent sub-flow adjacent to the fuel injectors and a main flow which is conducted past the members with minimum pressure loss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.