Recovery boiler
US5771817A · kind A · utility
10Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1996 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Dec 17, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23G2203/30
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A recovery boiler for combusting spent liquor from cellulose cooking while at the same time recovering chemicals. The recovery boiler is constructed for so-called "rotafire" combustion and the speed of rotation of the secondary air has been increased by a constriction of the boiler being arranged at the tertiary air level. The invention also includes a process for using the boiler which is based on certain ports through which the secondary air is blown in being provided with air which is at a higher pressure than that at the other ports on the same level, thereby achieving a higher inflow velocity than from the other ports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.