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

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All photos courtesy of Kvrner Pulping, Sweden

Kymmene mill, Finland, O2 plant