FI875275A - FOERFARANDE OCH ANORDNING FOER BEHANDLING AV MESA. - Google Patents

FOERFARANDE OCH ANORDNING FOER BEHANDLING AV MESA. Download PDF

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Publication number
FI875275A
FI875275A FI875275A FI875275A FI875275A FI 875275 A FI875275 A FI 875275A FI 875275 A FI875275 A FI 875275A FI 875275 A FI875275 A FI 875275A FI 875275 A FI875275 A FI 875275A
Authority
FI
Finland
Prior art keywords
sludge
cake
filter
treatment
drying
Prior art date
Application number
FI875275A
Other languages
Finnish (fi)
Other versions
FI87995C (en
FI87995B (en
FI875275A0 (en
Inventor
Pekka Ruokolainen
Juhani Kyytsoenen
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
Priority claimed from FI864869A external-priority patent/FI864869A0/en
Application filed by Ahlstroem Oy filed Critical Ahlstroem Oy
Priority to FI875275A priority Critical patent/FI87995C/en
Publication of FI875275A0 publication Critical patent/FI875275A0/en
Publication of FI875275A publication Critical patent/FI875275A/en
Application granted granted Critical
Publication of FI87995B publication Critical patent/FI87995B/en
Publication of FI87995C publication Critical patent/FI87995C/en

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  • Paper (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention relates to a process for the treatment of sludge and a device intended for application of the process. Sludge appears alongside white liquor in the causticizing process in a sulphate cellulose plant and the aim of the treatment is to separate, wash and dry the sludge for calcination. According to the invention, the sludge treatment is realized by means of a filter which rotates about its axis, such as a drum filter, by using suction to form on the filtering surface 2 of the filter 1, from a mixture 6 of sludge and white liquor, a sludge cake 7, by washing the cake with a detergent solution conducted through the latter and the filtering surface, by drying the cake with air conducted through the latter and the filtering surface and by removing the cake from the filter. For the formation of the sludge cake, the filter is preferably partially submerged in a basin 5 containing sludge and white liquor and, for washing and drying of the cake, is partially surrounded by a casing 8, to which the feed ducts 10 for the detergent solution and the drying air are connected. <IMAGE>
FI875275A 1986-11-28 1987-11-30 Method and apparatus for treating mesa FI87995C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI875275A FI87995C (en) 1986-11-28 1987-11-30 Method and apparatus for treating mesa

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FI864869 1986-11-28
FI864869A FI864869A0 (en) 1986-11-28 1986-11-28 FOERFARANDE OCH ANORDNING FOER BEHANDLING AV MESA.
FI875275 1987-11-30
FI875275A FI87995C (en) 1986-11-28 1987-11-30 Method and apparatus for treating mesa

Publications (4)

Publication Number Publication Date
FI875275A0 FI875275A0 (en) 1987-11-30
FI875275A true FI875275A (en) 1988-05-29
FI87995B FI87995B (en) 1992-12-15
FI87995C FI87995C (en) 1993-03-25

Family

ID=26158049

Family Applications (1)

Application Number Title Priority Date Filing Date
FI875275A FI87995C (en) 1986-11-28 1987-11-30 Method and apparatus for treating mesa

Country Status (1)

Country Link
FI (1) FI87995C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9636611B2 (en) 2012-02-06 2017-05-02 Andritz Oy Method for removing the precoat layer of a rotary filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9636611B2 (en) 2012-02-06 2017-05-02 Andritz Oy Method for removing the precoat layer of a rotary filter

Also Published As

Publication number Publication date
FI87995C (en) 1993-03-25
FI87995B (en) 1992-12-15
FI875275A0 (en) 1987-11-30

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Legal Events

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MM Patent lapsed

Owner name: A. AHLSTROEM OY