FI950314A - Process for the production of pulp - Google Patents

Process for the production of pulp Download PDF

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Publication number
FI950314A
FI950314A FI950314A FI950314A FI950314A FI 950314 A FI950314 A FI 950314A FI 950314 A FI950314 A FI 950314A FI 950314 A FI950314 A FI 950314A FI 950314 A FI950314 A FI 950314A
Authority
FI
Finland
Prior art keywords
digester
black liquor
chips
cooking
pulp
Prior art date
Application number
FI950314A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI102394B1 (en
FI102394B (en
FI950314A0 (en
Inventor
Olavi Pikka
Original Assignee
Ahlstroem Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ahlstroem Oy filed Critical Ahlstroem Oy
Priority to FI950314A priority Critical patent/FI102394B/en
Publication of FI950314A0 publication Critical patent/FI950314A0/en
Priority to SE9600272A priority patent/SE9600272L/en
Publication of FI950314A publication Critical patent/FI950314A/en
Application granted granted Critical
Publication of FI102394B1 publication Critical patent/FI102394B1/en
Publication of FI102394B publication Critical patent/FI102394B/en

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Abstract

The present invention concerns a method for preparation of pulp by a so-called superbatch process in which chips are fed by a feed device into a digester in which air is removed between the chips with a suction device, the digester is filled from the bottom with black liquor which is preheated and impregnates the chips and removes air residues from the digester, the digester is pressurized and to pretreat the pulp with hot black liquor, the black liquor is pumped into the digester with simultaneous displacement of the previously fed black liquor, the digester liquid is supplied by pumping hot white liquor and a small amount of hot black liquor into the digester, the temperature in the digester is raised to the final cooking temperature by using steam, the cooking liquid is displaced with the cooled washed filtrate after the cooking reactions have reached the desired degree of cooking, the cooked pulp is removed from the digester by pumping it to a discharge vessel; and in which process the chips are treated with steam before supply impregnation liquor in order to evacuate the gases bonded to the fibers. <IMAGE>
FI950314A 1995-01-24 1995-01-24 Method for producing pulp FI102394B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI950314A FI102394B (en) 1995-01-24 1995-01-24 Method for producing pulp
SE9600272A SE9600272L (en) 1995-01-24 1996-01-24 Method and apparatus for treating pulp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI950314A FI102394B (en) 1995-01-24 1995-01-24 Method for producing pulp
FI950314 1995-01-24

Publications (4)

Publication Number Publication Date
FI950314A0 FI950314A0 (en) 1995-01-24
FI950314A true FI950314A (en) 1996-07-25
FI102394B1 FI102394B1 (en) 1998-11-30
FI102394B FI102394B (en) 1998-11-30

Family

ID=8542509

Family Applications (1)

Application Number Title Priority Date Filing Date
FI950314A FI102394B (en) 1995-01-24 1995-01-24 Method for producing pulp

Country Status (1)

Country Link
FI (1) FI102394B (en)

Also Published As

Publication number Publication date
FI102394B1 (en) 1998-11-30
FI102394B (en) 1998-11-30
FI950314A0 (en) 1995-01-24

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Legal Events

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Owner name: AHLSTROM MACHINERY OY