Paper web drying system and process
US4242808A · kind A · utility
33Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1978 |
| Grant date | Jan 6, 1981 |
| Priority date | — |
| Expiry date | Nov 22, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The paper web is directly contacted with superheated steam to evaporate the water in the paper web by direct contact and to remove some of the superheat from the steam. The exhaust steam is again superheated and recycled back to the direct contact dryer. The paper web drying system includes a direct contact dryer, a superheater such as a heat exchanger, means for feeding the exhaust steam from the direct contact dryer to the heat exchanger, and means for feeding superheated steam from the heat exchanger back to the direct contact dryer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.