next generation compactcooking technology | valmet

Next generation CompactCookingtechnologyValmet CompactCooking™ generation three

With our history we are developing the future

October, 2018 © Valmet | Customer Days 20182

Flowsheet of first ideas of a continuous digester system made by Mr. Johan Richter in 1939

Development of the continuous cooking system


CompactCooking™ G3CompactCooking™ G1 CompactCooking™ G2

32 systems delivered16 systems delivered

1997 2003 2018

Development of the continuous cooking system


CompactCooking™ G3CompactCooking™ G1 CompactCooking™ G2

32 systems delivered16 systems delivered

1997 2003 2018

CompactCooking™ G3

• Developed for mega sized HW lines

• Improved pulp washing and flexibility

• Custom features available from case to case

Valmet: the market leader in cooking


CompactCooking™

systems sold


The proven benefits of CompactCooking™

Results

• High yield

• Low reject amount

• Low energy consumption

• Easy to maintain

• High availability

• ImpBin™ technology• Impregnation at low temperature

for a long time

• Two vessel system concept• Low cooking temperature

• Enables liquor to wood ratio control

• Enables black liquor recirculation for high yields

• Concurrent operation

• Simplicity• Few active components

ImpBin™ combines chip bin, flashing and impregnation functions

Preparation of the wood chips for impregnation and cooking

Impregnation for a long time and at low temperature together with black liquor gives:– Higher yields

– Improved pulp quality

– Lower cooking temperature


Steaming is essential for the function of the cooking plant

Chip buffer & steaming

Flashing Impregnation

Chip buffer zone

Cold zone

Steaming zone

Impregnation zone

ImpBin™

G2 G3

CompactCooking™

ImpBin improvements

G2 vs G3

Multi pipes – Improved steaming

– Improved alkali & temp distribution

Steam baffles

Improved flexibility with low extraction– Adjustable steaming and impregnation zone

Degassing possibility – Turpentine recovery for SW


VS

G2 G3

CompactCooking™

Digester improvements

G2 vs G3

From 2 to 3 cooking zones

Improved cross-section temperature and alkali profile

Improved alkali adjustment

Improved digester washing


VS

0

5

10

15

20

25

30

35

0 50 100 150 200 250

Re

sid

ua

l alk

ali

(g E

A N

aO

H/l)

Retention time (min)

Improved flexibilityAdditional cooking zone, increased alkali flexability

October, 201811

CC G2

CC G3

© Valmet | Customer Days 2018

Additional cooking zone, increased alkali profile

CompactCooking G3


0

10

20

30

40

50

0 60 120 180 240

Re

sid

ua

l alk

ali

(g E

A N

aO

H/l)

Retention time (min)

Layout

CompactCooking™


Man holes

Hydraulic Units

Outlet device openings

• Cost effective layout

• Compact footprint, reduced by approx. 10%

• Service-friendly, easy access to equipment, valves & instruments

• Minimized platform area

• Independent of pipe bridge

• Expandable for additional or future heat exchangers

Easy access to manholes in front of digester and ImpBin, outlet devices and hydraulic units

Layout

CompactCooking™


• Optional overhead crane for maintenance of heat exchanger top parts, valves, instruments and chip level pump motor

• Easy access to heat exchangers and piping at different levels

• Platforms for access to valves and instruments inside heat exchanger steel structure

Movable platform at ground level for access to heat exchanger lower parts

Driving access through cooking plant below pipe bridge

Optimized bleachability


Improved flexibility

Improved washing

Improved maintenance / accessibility

Improved sustainability

Performance improvements

next generation compactcooking technology | valmet

Documents