Heat recovery from spent cooking liquor in a digester plant of a chemical pulp mill
US8808498B2 · kind B2 · utility
1Cited by
3References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 2010 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Aug 7, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for heating white liquor or a mixture of white liquor and another liquid for use in a digester system of a chemical pulp mill, the method including the steps of: producing black liquor in the digester system; extracting black liquor from the digester system, flashing the extracted black liquor and thereby generating flashed black liquor and flash vapor; directing the flash vapor through a heat exchanger to heat a white liquor flowing through the heat exchanger; the flashed black liquor flows to at least one of a heat recovery or evaporation stage, and the heated white liquor flows to the digester system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.