Method for treating pulp in an indirect heat exchanger in connection with bleaching
US6136145A · kind A · utility
3Cited by
4References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1997 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Dec 16, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F13/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of treating pulp and an apparatus for practicing the method are particularly suitable for the bleaching of medium consistency pulp when bleaching stages of varying temperature are used. Chemical pulp is treated in such a way that the pulp is allowed to flow prior to a bleaching reactor, in the reactor itself, and/or after the reactor, at a velocity of less than 5 m/s through an indirect heat exchanger in order to change the pulp temperature more than 5.degree. C., preferably more than 10.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.