Low-emission drying of wood chips
US5263266A · kind A · utility
14Cited by
2References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1990 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Nov 13, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B2200/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the low-emission drying of wood chips has a first dryer (2) directly heated by means of a combustion chamber (3). Arranged in series in relation to this dryer (2) is a second, indirectly heated dryer (5) whose exhaust air is recycled to the combustion chamber (3) via line (7). The exhaust gases discharged from the dryer (2) are passed to a second combustion chamber (11) where they are heated to at least 300.degree. C., whereby the pollutants are eliminated. The heat used for this purpose can be recovered by means of a waste heat boiler (14) and used for heating the second dryer (5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.