Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1992-10-13
1995-01-10
Jones, W. Gary
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162 29, 162 31, 162DIG8, 60648, 159 49, 159 473, 159DIG8, D21C 1112
Patent
active
053804023
ABSTRACT:
A pulp mill has zero or minimum liquid discharges. The large amounts of liquid that must be processed to achieve this result are handled utilizing a multiple effect evaporator provided with heat from a steam exhaust of a condensing type steam turbine. Super heated steam from the recovery and bark boilers is fed to the turbine to generate electricity for the production of bleaching chemical and other uses in the mill. Three or four steam exhausts having different composite temperature and pressure values are taken from the turbine and used where most suitable in the pulp mill. For evaporation of bleach plant effluent the steam taken from the turbine preferably has a pressure of about 1-3 psia and a temperature of about 120.degree.-140 .degree. F, and has no significant adverse affect on power generation.
REFERENCES:
patent: 2258401 (1941-10-01), Badenhausen
patent: 4405418 (1983-09-01), Takemura
patent: 5116595 (1992-05-01), Scribner et al.
W. Howard Rapson, "The Effluent-Free Bleached Kraft Pulp Mill", Tappi, vol. 56, No. 9, Sep. 1973, pp. 112-115.
Jaakko Poyry "Closing Up the Bleach Plant".
Paul Conner, "A Cogeneration Study Considering Electric Rates Resulting from PURPA", Tappi, Aug. 1984, pp. 54-57.
Greenwood Brian F.
Gullichsen Johan
Kiiskila Erkki
Mattelmaki Esko
Nykanen Tuomo S.
Jones W. Gary
Kamyr Inc.
Nguyen Dean T.
LandOfFree
Reducing pulp mill liquid discharge does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reducing pulp mill liquid discharge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reducing pulp mill liquid discharge will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-848752