Ahlstrom, Kamyr Pulp Drying Line

Pulp dryer DM6 4200 mm, a Kamyr wetlap machine with
rifled feltness press rolls and an airborne FLÄKT dryer,
a cutter-layboy and a bale press 600 AD ton/d

Stock preparation
– Pulp stock chest V = 100 m3 ( d = 5000, H =4850 ) / Ahlström (1983)
– Machine chest V = 50 m3 (d = 3800, H = 4500) / Ahlström (1982)
– Pressure screening ModuScreen AL5 (Guard) +
Sorter M 1600 / Ahlström (1998+1990)
Three-stage hydrocyclone screening / Ahlström (1990)
Enso TwinCleaner 67 d=1275…. max 55 pcs twin cyclones
Enso TwinCleaner 67 (66) d=650…. max 12 pcs twin cyclones
Enso TwinCleaner 67 (66) d=370…. max 13 pcs twin cyclones
Wet end …. a Kamyr wetlap machine
Headbox + Suction mould / Ahlström (1982)
Cylinder (d=3500, b =4200) rebuilt (enhanced) in 2018 bt Valmet
Press #1 / Ahlström (1982)
Rifled press rolls (d=800, b=4200)…. replaced in2014 by
Valmet utilizing refurbished old rolls delivered originally to
an other mill.
Press#2 / Ahlström (1964)
Rifled press rolls (d=800, b=4200) Valmet (2015)
Press #3 / Ahlström (1982)
Rifled press rolls (d=900, b=4200) Valmet (2004)
Dryer
FCG airborne dryer 600 AD ton/d (b max = 4300) / ABB (2000)
18 decks w/ 21 towers (incl. the end towers)… 102 pcs FD
circulation fans (norm. power consumption ca. 1,4 MW)
L = 41000, b = 8800, H = 7250
Base weight 1100-1600 g/m2… design 1490 g/m2,
speed 60 m/min
P max = 12,7 bar G (Tmax=205 degrees)…desing 2,3 bar G
Cutter and layboy (5x840x750) / Ahlström (1982)
Rebuilt in 2002 from an earlier DM2 cutter (1964, Ahlström)
with a new layboy
Cutter rebuilt in 2002 by Metso ; improved heating of
the cutter roll and the bed knife beam
Bale press 1000 ton / Ahlström (1982)
Hydraulic system rebuilt in 1990 by Valmet
Stracker 1200 AD ton/d / Pukero (2007)
Stack strapper (4×250 kg) Cranston 60B23 / Ahlström (1982)
Drive control with ABB’s frequency converters / ABB (2000)
Online quality control
Moisture and base weight: Accuary / ABB (2000)
Updated in 2018 by ABB
Web inspection system: PQV 5020 dirt count analyzer /
Valmet (2016)
includes web break monitoring
Brightness: Experion MX Color Q4215-60 / Honeywell (2016)

Bale handling
Chain conveyer system 600 ? 600 AD ton/d incl.
pulp storage area / Ahlström (1982)
The tipping device for strapped bale stacks (1000 kg)
replaced in 2002 by Pukero
Export pulp bale handling 1200 AD ton/d / Pukero (2007)
Wrapper applier … replaced with Valmet Wrapper Applayer
(Roll ERC) in 2022
2 pcs 250 kg bale starppers Cranston 986
Wrapper folder
Stracker
Bundle strapper Cranston 60B040