Energy, Recovery, Lime Kiln and Recaust

November 2 - 4, 2020 | Virtual

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Energy, Recovery, Lime Kiln and Recaust (ERLR)

The chemical recovery cycle makes kraft pulping economically feasible. Key unit operations including the recovery boiler, recaust plant, lime kiln and power generation have significant impacts on maintaining high mill production rates. The purpose of this year’s sessions and panels is to provide experiences from industrial and academic experts on equipment maintenance, process chemistry and new technologies.

This track will provide participants with both fundamental and practical knowledge on key process areas in a mill, including evaporators, recovery boiler, recaust plant, lime kiln and energy generation. Topics are focused on maximizing the efficiency and throughput of the recovery cycle. Participants can also attend panels for in depth discussions with industry experts.

Recommended for operators, process engineers, control engineers, superintendents, managers and graduate students.

View the ERLR Track Schedule

 

Cantrell

Presenter:
James Cantrell, Jacobs Engineering

FEATURED PRESENTATIONS

 
Black Liquor Evaporators Upgrade - Life Cycle Cost Analysis

Session 11  •  Tuesday, November 3  •  1:30pm - 3:00pm

Black liquor evaporation is generally the most energy intensive unit operation in a pulp and paper manufacturing facility.  The black liquor evaporators can represent a third or more of the total mill steam usage followed by the paper machine and digester. 

The median age of all North American evaporator systems is 44 years.  Roughly 25% of the current North American operating systems are 54 years or older.  Older systems require more periodic maintenance and have a higher risk of unplanned downtime.  Also, older systems have chronic issues with persistent liquor and vapor leaks, shell wall thinning, corrosion, and plugged tubes. Often these issues worsen to the point of requiring rebuild or replacement. 

This presentation will review the current state of black liquor evaporator systems in North America and present a basic method for determining whether a major rebuild or new installation is warranted using total life cycle cost analysis (LCCA).

Maggs

Presenter:
Elizabeth Maggs,
University of Toronto

Settling and Filtering Properties of Green Liquor Dregs

Session 12  •  Tuesday, November 3  •  1:30pm - 3:00pm

Poor dregs settling and filterability have been a persistent problem in many kraft pulp mills, resulting in poor lime quality, poor pulping liquor quality, and ultimately poor pulp quality.

In severe cases, poor dregs settling and filterability can lead to equipment shutdown for cleaning resulting in substantial production losses.

This presentation will examine how black liquor burning temperature and the resulting char characteristics may affect dregs settling and filtering behaviors.



Energy, Recovery, Lime Kiln and Recaust Track Schedule

(Program is subject to change.)

 

Tuesday, November 3
     
           
1:30pm - 3:00pm
Session 11: Black Liquor Processing: Evaporators to Boilers
   

Session Chair: Eric Jin, Babcock and Wilcox

 
     

Black Liquor Evaporators Upgrade - Life Cycle Cost Analysis

James Cantrell, Jacobs Engineering
     

The impact of utilizing the leading edge sootblower nozzle on recovery boiler heat exchanger tubes

Danny Tandra, Clyde Industries, Inc.; Markku Paakkonen, Pasi Miikkulainen, Andritz; Shenglong You, Markus BussmannUniversity of Toronto
      
1:30pm - 3:00pm
Session 12: Improving Processability of Green Liquor
 

       Session Chair: Thanh Trung, FITNIR Analyzers Inc.

 
     

Settling and Filtering Properties of Green Liquor Dregs

Elizabeth Maggs, Xiaosong Mao, Torsten Meyer, Honghi Tran, University of Toronto; Andrew Jones, International Paper
     

CleanFlow Microfiltration Technology for Green and White Liquor

Rohan Bandekar, Jon Foan , Jim Wearing, NORAM Engineering; Anna Oldmark, Lennart Kallen, Cleanflow AB; Mikael Lindstrom, KTH Royal Institute of Technology; Jakob Liedberg, NORAM International AB
     

Removal of Aluminum From Raw Green Liquors

Thiago Silva Pinto de FariaSuzano S.A
         
3:15pm - 4:45pm
Session 16: Managing Dissolving Tank Operation and Safety
   

Session Chair: Danny Tandra, Clyde Industries, Inc.

 
     

Development of Converging-Diverging Multi-Jet Nozzles for Molten Smelt Shattering

Eric Jin, Tony Habib, Simon Youssef, and Steve Osborne, Babcock and Wilcox; Honghi Tran, University of Toronto
     

Can Jellyroll Smelt be Effectively Shattered?

Markus Bussmann, University of Toronto
     

Scale Formation in Recovery Boiler Smelt Dissolving Tanks

 Honghi TranUniversity of Toronto
           
3:15pm - 4:45pm Session 17: Key Maintenance Issues for Rotary Kilns Panel Discussion
Session Chair: Peter Gorog, Houghton Cascade Holdings, LLC

Panelists:

Palle Hansen - Valmet
Justin Bready - Kiln Technology
Josh Brant - Andritz
     
     
Wednesday, November 4
 
11:00am - 12:30pm
Session 23: Strategies to Improve Energy Usage in Mills
 

       Session Chair: Pasi Miikkulainen, Andritz Inc.

     

Boiler Retrofit Improves Efficiency and Increases Biomass Firing Rate

Samit Pethe, Paul W. Cloninger, Jansen Combustion and Boiler Technologies Inc. and Ryan R. Shortreed, Ken M. Hardison, Domtar Paper Company LLC
     

Total Pulp and Paper Mill Energy Evaluations

Richard Reese, CleanTech Partners
     

Has the Time Come for Industrial Scale Energy Storage in The Pulp and Paper Industry

Aurel Giroux, Stantec Consulting
     

11:00am - 12:30pm

Session 25: Lime Kiln Design to Increase Productivity
   

     Session Chair: Ray Leary, Houghton Cascade Holidings, LLC

 
     

Successful conversion to gas firing – how to avoid the downsides and get increased productivity and less emissions

Adriano Greco, FCT Combustion Inc.
     

Impact of Burner Design on Combustion Efficiency and Lime Kiln Performance

Eduardo Tater, Fives Pillard
     

Kiln Lining Installations a “Contractor’s Perspective”

 Tim Baker, JT Thorpe and Sons Engineering and Refractory Services

12:30am - 2:00pm

Session 26: Effects of Process Conditions on Lime Kiln Operation
   

     Session Chair: Wei Ren, FPInnovations

 
     

Effects of Rings on Flow and Temperature in Lime Kilns

Patrick Gareau, Markus Bussmann, Nikolai DeMartini, Honghi Tran, University of Toronto
     

How Process & Mechanical Conditions Affect Lime Recovery Kiln Thrust Positions - A Review of Operations and Mechanics for this Phenomenon

Andrew Wisner, Metso