DURALYZER-2 TM Black Liquor Trim Measurement Solution Copyright © 2000-2017 R. E. Hodges, LLC

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DURALYZER-2 TM

Black Liquor Trim Analyzerby R. E. Hodges, LLC

DURALYZER-2 TM

Black Liquor Trim Analyzerby R. E. Hodges, LLC

DURALYZER-2 TM is the second generation of the DURALYZER TM

series of online liquor analyzers.

DURALYZER-2 TM is the product of over 20 years of experience implementing UV & NIR technology for online liquor analysis applications.

The DURALYZER-2 TM series analyzers are the most cost effective and reliable solutions available on the market.

TankC

ToEvaporators

FromBlow Tank(s)

CausticMakeup

TankA

TankB

TankC

TankD

DURALYZER-2 TM Black Liquor Trim Analyzer

Typical four sample point installation

DURALYZER-2 TM Black Liquor Trim Measurement Solution Copyright © 2000-2017 R. E. Hodges, LLC

Online composition measurements for pulping and recovery liquors have typically been a great challenge for pulp mills. Traditional measurement techniques such as conductivity, density meters, refractometers, bubble tubes, etc. have had some limited success but suffer from a myriad of operational issues. These include but are not limited to scaling and measurement disturbances due to liquor matrix composition. These devices measure a single property of the liquor and infer the desired measurement from this data. Variations in the overall composition of the liquor can cause frequent recalibration of these devices. Automated titration units were developed to deal with this issue. These devices, however, suffer from high maintenance requirements along with a very high total installed cost.

Near Infrared (NIR) and Ultraviolet (UV) spectroscopy can be used to address all of the above mentioned challenges. These methods can provide reliable and accurate online measurements for liquors throughout the entire liquor cycle.

For the past 20 years R. E. Hodges, LLC has been developing and refining online and lab based analyzers based on these spectroscopic techniques that provide full compositional analysis of white, green and black liquors at all locations in the pulping and recovery process.

DURALYZER-2 TM is the latest incarnation of of the DURALYZER TM series of online and lab based liquor analyzers. DURALYZER-2 TM features many improvements and innovations over the prior DURALYZER TM generations.

Two key DURALYZER-2 TM innovations include a proprietary high cycle life sample valve and a small footprint completely self contained NIR spectrometer.

This valve is a plunger style valve which uses the best elements of gate valves and ball valves. All wetted parts are 316 stainless steel. The spectrometer is implemented using a scanning monochromator design with a miniature onboard Linux computer controlling the optical system.

Compact-NIR TM Spectrometer

9” x 4” x 2.5” Footprint

DURALYZER-2 TMBlack Liquor Trim AnalyzerDURALYZER-2

TMBlack Liquor Trim Analyzer

Other innovations and improvements include

• Small two cabinet footprint• Greatly reduced component count• Simplified & improved electronics• Simplified & improved optics• Improved accuracy and repeatability• Simplified power requirements• Improved self-cleaning system• Windows based user interface• Internal and external TCP/IP communications• Remote cellular access• Comprehensive MODBUS TCP & RTU interface• Reduced analyzer cost• Reduced installation cost• Comprehensive “Never Obsolete” service agreement• Wall mount or rack mount options• Very high up time and reliability

DURALYZER-2 TM Black Liquor Trim Analyzer

DURALYZER-2 TM Black Liquor Trim Measurement Solution Copyright © 2000-2017 R. E. Hodges, LLC

DURALYZER-2 TMBlack Liquor Trim AnalyzerDURALYZER-2

TMBlack Liquor Trim Analyzer

DURALYZER-2 TM Principle Of Operation

The DURALYZER-2 TM black liquor trim analyzer uses NIR transmission for determining composition of white and black liquors. Light from a broadband QTH (Quartz Tungsten Halogen) bulb is projected through the sample under test. The sample is tested in a large volume transmission cell with sapphire windows. Light is transmitted through the sample that is in the gap between the sapphire windows. The exiting light is collected with a lens and projected into a fiber optic cable which is coupled to the spectrometer. The spectrometer then measures the light intensity at approximately 1000 discrete wavelengths in the range of 1000nm – 2200nm. The resulting data generates the spectral signature of the sample. This spectral signature contains all of the composition information of the sample. The spectral signature of the sample is then interpreted by the onboard computer to determine composition information. The analysis results are then transmitted to the DCS via MODBUS. The following figure shows a summary of this process.

QTHLamp

SampleFlow

Transmission Cell

Onboard Computer

Mill DCS

Analysis Results

MODBUS Link

Compact-NIR TM Spectrometer

Fiber OpticLink

SpectralSignatureOf Sample

InterpretSpectralSignature

DURALYZER-2 TM

SamplingSystem

DURALYZER-2 TM Sampling System

The sampling system is tasked with consistently delivering representative samples from the process into the sample cell. The DURALYZER-2 TM sampling system has many unique and innovative features that ensures this function is carried out reliably with minimal maintenance overhead. The sampling system is designed to operate as a flow through bypass loop that extracts samples from different points (up to 8 for standard configuration) and returns the sample back into the process. For non pressurized lines, a novel vacuum system is used to produce the driving force for sample flow through the sample cell. An automated acid cleaning system ensures that sample lines, sample cell and internal tubing stay scale free. All sampling, cleaning and sample analysis functions are controlled by the analyzer’s onboard computer requiring no external DCS control for analyzer operations.

DURALYZER-2 TM Black Liquor Trim Measurement Solution Copyright © 2000-2017 R. E. Hodges, LLC

DURALYZER-2 TMBlack Liquor Trim AnalyzerDURALYZER-2

TMBlack Liquor Trim Analyzer

DURALYZER-2 TM Software

The DURALYZER-2 TM black liquor trim analyzer has a complete suite of software modules with a familiar

Windows interface. These modules include operator interface, system configuration, calibration functions, diagnostic functions and communication functions. The operator interface module provides the real time sample point sequencing and sample analysis functions. Scrolling text windows display detailed information about analyzer operations at any given time. In addition, internal analyzer sensors and alarms are also displayed. The system configuration module provides a user interface for naming sample points and components, defining sample point sequencing, defining the MODBUS register map and editing sampling system parameters on a per sample point basis. The calibration module provides the data collection functions and mathematical tools to develop the relations between spectral signatures and composition data. The communication module takes the analysis results and transfers them to the DCS via MODBUS data. MODBUS registers and bits can also be defined for analyzer alarms and current analyzer operations. The following figures show typical screenshots from these software modules.

Operator Interface Operator Interface

Operator Interface Communications

Configuration Calibrator

DURALYZER-2 TM Black Liquor Trim Measurement Solution Copyright © 2000-2017 R. E. Hodges, LLC

DURALYZER-2 TMBlack Liquor Trim AnalyzerDURALYZER-2

TMBlack Liquor Trim Analyzer

DURALYZER-2 TM In Operation

The following figures show some comparisons between the DURALYZER - 2 TM black liquor analyzer and lab testing. These comparisons are for black liquor residual EA, TTA, total dissolved solids (TDS) and specific gravity. Other black liquor properties have similar comparisons.

DURALYZER-2 TM Performance Tests

The following table shows DURALYZER-2 TM performance compared to lab testing. These tests were carriedout under tightly controlled conditions to quantify best achievable analyzer performance.

COMPONENT OR PROPERTY RANGE ACCURACY REPEATABILITYResidual Effective Alkali (REA) 0-60 g/L-Na2O ±±±± 0.4 g/L-Na2O ±±±± 0.25 g/L-Na2O

ResidualActive Alkali (RAA) 0-60 g/L-Na2O ±±±± 0.8 g/L-Na2O ±±±± 0.35 g/L-Na2O

Residual Total Titratable Alkali (RTTA) 0-100 g/L-Na2O ±±±± 1.0 g/L-Na2O ±±±± 0.55 g/L-Na2O

Lignin 0-220 g/L-Na2O ±±±± 1.75 g/L-Na2O ±±±± 0.95 g/L-Na2O

Total Dissolved Solids (%TDS) 0-40% ±±±± 0.4 % ±±±± 0.25 %Baume (º) 0-40 ±±±± 1 º ±±±± 0.5 º

Specific Gravity (S.G.) 1.000-1.400 g/mL ±±±± 0.005 g/mL-Na2O ±±±± 0.002 g/mL-Na2O

Suspended Solids (ppm) 0-10,000 ±±±± 40 ppm ±±±± 5 ppm

DURALYZER-2 TM Black Liquor Trim Measurement Solution Copyright © 2000-2017 R. E. Hodges, LLC

DURALYZER-2 TMBlack Liquor Trim AnalyzerDURALYZER-2

TMBlack Liquor Trim Analyzer

• Multi-component analysis

• Automated cleaning system to preventscale buildup

• Immune to suspended solids- No titration head to dismantle for cleaning

• Compact two cabinet footprint- Strategically locate analyzer to minimize

sample line runs

• No special housing requirements

• Compact-NIR TM stand alone spectrometer- No need for long fiber optic cable runs

- Spectrometer integrated into analyzer, does

not need to be installed in an MCC room

• High cycle life valve solution

• Familiar Windows user interface

• Completely integrated turnkey solution- No need for DCS/PLC programming to

control sampling operations

• Modular design for easy service

• “Never Obsolete” service agreement- Guarantees hardware and software are

always up to date

• Unique and reliable filtration system forremoving chip debris from samples

• Support for all MODBUS standards

• Up to 8 sample points standard

• Lowest total installed cost comparedto similar solutions guaranteed

• Lowest maintenance requirementscompared to similar solutions

Advantages Of DURALYZER-2 TM

DURALYZER-2 TM Benefits

• $0.35M - $0.75 M savings/year

• Less than six months ROI

• Reduce caustic usage

• Reduce black liquor variability

• Operate closer to target residual

• Reduce lab testing frequency

• Reduce lab chemical usage

• Reduce solids variability

• Reduce evaporator variability

• Reduce viscosity variability

• Increase energy recovery

DURALYZER-2 TM Footprint

31.5”

31.5”

Minimum 74”

63”