Post on 24-Nov-2015
Instrumentationfor Paper & Pulp Applications
ABB Automation
Delignification is the process by whichthe majority of lignin is removed frompaper pulp. Oxygen is used to ensurea less damaging effect on the plantand surrounding environment thanmore aggressive chemical methods
In the bleach plant, the remaininglignin is removed by stronger chemicalmeans, and any residual color isremoved by chemical oxidation toattain the desired brightness.
Dedicated, robust instrumentationand advanced control are required toachieve this efficiently.
Oxygen Delignificationand Bleaching
Skoghall, Sweden, O2 plant
LF
Q
dP
pHdP T
P
pH
T
dP dPdP
F
Q
SPP
FT
pH
pH
Rs
dPdP
pHF
pH
L
pH
dPdP
pH
ChemicalAddition
ChemicalAddition
pHT
Br
SPP
Rs
dPdP
ChemicalAddition
T pH
Oxygen Delignification
FromDigester
L
F
F
F
NaOH
Steam
2O
Steam
Prod
Bleaching
mS
mSpH
mS
pH
pH
ChemicalAddition
F F
dPdP
Br mSORP
To PaperMachine orPulp Dryer
mS
pH
pH
pH
pH pH
ASK 800Accu-brite TCA ConsistencyAnalyzer
MAG SM Smart PulpPlatform (SPP)
TB465 TB82 TBX551 TBX557 TrioWirl TrioMass
Key
ORP Redox (TB551, TB557, TB82pH)
pH pH (TB551, TB557, TB82pH)
F Flow (MAG SM, TrioWirl)
P Pressure (ASK 800)
dP Differential Pressure (ASK 800)
L Level (ASK 800)
T Temperature (SensyTemp WTR)
mS Conductivity (TB82EC, TB465)
MF MassFlow (TrioMass)
Q Consistency (TCA)
SPP Kappa, Fibre size, NIR, Dissolved Lignin (SPP)
Br Brightness (Accu-Brite)
Rs Residuals (Accu-Brite)
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The Companys policy is one of continuous productimprovement and the right is reserved to modify theinformation contained herein without notice. ABB 2000 (04.00)
ABB Instrumentation LtdOldends LaneStonehouse, Glos.England, GL10 3TATel: +44 (0) 1453 826661Fax: +44 (0) 1453 827856
ABB Automation Inc.2175 Lockheed WayCarson City, NV 89706 USATel: +1 775-883-4366Fax: +1 775-883-4373
ABB Automation ProductsDransfelder Str. D-37079GttingenGermanyTel: +49 (0) 5 51 9 05-0Fax: +49 (0) 5 51 9 05-777
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ABB Instrumentation provides:
Application Know-how
Full-scope Supply
Innovative Technology
Rugged Devices
Global Service Support
All photos courtesy of Kvrner Pulping, Sweden
Kymmene mill, Finland, O2 plant