2011 DRY SCRUBBER USERS CONFERENCE
TECHNICAL PRESENTATION DETAILS
           
Date Time Presentation Title Subject  / Abstract Presenter
Name		 Company
Monday
September 12		 1:00 pm - 5:00 pm PLANT TOUR 1
Gainesville Regional Utilities
Deerhaven Generating Station
Unit 2 Circulating Dry Scrubber

 
Tuesday September 13
 		 7:15 am-7:45 am
Breakout Session
 		 Introduction to Semi-Dry and CDS Scrubbers - Theory and Practice An interactive overview of basic dry scrubber theory and practice, intended as a primer for individuals new to the conference or technology Kevin Redinger Babcock & Wilcox
8:15 am-8:45 am
Keynote Address 1

 		 Exchanging Valuable Knowledge - Engaging in the Decision Making Process Former submarine officer and professional problem solver Guy Harris shares knowledge we can all use to navigate the waters of group dynamics and decision making in complex technical environments.
 		 Guy Harris The Recovering Engineer
8:45 am-9:15 am
Keynote Address 2

 		 SDA vs. CDS: Lessons learned in the  Building 253 Dry Scrubber Retrofit Decision Eastman Chemical will share perspectives and lessons learned  during their recent evaluation of SDA vs. CDS technology for the Building 253 Powerhouse scrubber retrofit project. Jeff Taylor Eastman Chemical
9:15am- 12:00pm
Plenary Session

 		 HAPs Control Experiences in Dry Scrubbers
for Utility MACT Compliance
 		 The draft Utility Air Toxic MACT rule for emission limits for key hazardous air pollutants (HAP) was issued in March 2011.  This presentation will look at the proposed emission limit for each pollutant, review emissions data from existing SDA and CDS installations, provide a perspective on the potential for compliance with the new rules with these dry scrubbing technologies and discuss emissions measurement concerns including detection limits and variability.  Kevin Redinger Babcock & Wilcox
Circulating Dry Scrubber Retrofit Experience at GRU Deerhaven Unit 2 GRU Deerhaven Unit 2 is a 250 mw coal-fired generating unit originally constructed in 1981. In 2009, the unit was retrofitted with a selective catalytic reduction (SCR) system, circulating dry scrubber (CDS) and fabric filter.  This paper will discuss details of the project and recent experience to complement the Plant Tours.
 		 Eric Walters Gainesville Regional Utilities
SO2 Control Precision – Lessons Learned, Best Practices and Benefits in Semi-Dry FGD Systems

 		 Lessons learned recently show that SO2 emission can be controlled substantially more precisely than previously experienced in semi-dry FGD systems.  Benefits have included enhanced boiler operation, substantial cost savings in terms of lime and flyash disposal, reduced operating workload and increased compliance confidence.  By reference to actual case studies, this paper will highlight recent lessons learned, best practices and benefits of SO2 emission control precision in semi-dry FGD systems.   Stewart Nicholson Primex Process Specialists
Effects of Dry Scrubber Product on the Flow-Ability of Fly Ash in Comparison with Other Fly Ashes It is well known that achieving reliable flow of a dry scrubber fly ash can be challenging, particularly through various types of hoppers in the conveying system. The flow-ability of powders is dictated by several characteristics inherent to the nature of the powder. This presentation will examine how each property of flyash affects the flow-ability of fly ashes and other powders to shed light on some of the practical issues faced by the industry. Tyler Little
A-S-H R&D		 Allen Sherman Hoff
Start-Up and Initial Operation of the Gas Suspension Absorbers at Point Comfort This paper will discuss the recent start-up and initial operating experience of the Gas Suspension Absorbers at the Formosa Industries boilers in Point Comfort, TX. 
 		 Mike Widico Lodge Cottrell
Plant Reports
Session 1		 A series of briefings will be presented by dry scrubber users. Each briefing provides an overview of scrubber operations and describes a particular challenge presently faced or recently overcome.
 		 TBD TBD
1:00 pm - 4:30 pm
Reagent Preparation and Handling
Breakout Session
 		 Slurry Pump Seals - Packing or Mechanical Seals An overview of the two types of seals, the strengths and weaknesses of each type of seal, and why each type is used.  Discussion on using waterless mechanical seals vs mechanical seals that require flushing water.   Gary Grubbs Worley Parsons
Lime Slurry Additive Experience ASI lime slurry additive  produces a less viscous and smaller particle sized lime slurry than is possible under normal slaking techniques.  This presentation will describe recent experience with this additive at a plant equipped with semi-dry type FGD systems.
 		 Darrell Coker Applied Specialties, Inc.
Moderated Discussion A moderated discussion will be held on relevant topics of mutual interest to the group.
 		 Moderator Moderator
1:00 pm - 4:30 pm
Erosion and Corrosion
Breakout Session
 		 CORRODED AND POLLUTED
Reasons, Results and Mitigation for Corrosion Damage in Dry Scrubber Applications 		 This paper identifies the different corrosion types, demonstrates the damage that can occur in power plants with dry scrubbers and discusses methods to mitigate damage and minimize cost of corrosion control.
 		 Dan Johnson Omega Atomizers
Corrosion Mitigation With Hydrophobic Insulation Severe corrosion of both internal and external steel surfaces is caused by wet external insulation. This presentation will describe the advantages of hydrophobic  blanket insulation with application potential in dry scrubbers.  Monica Chauviere


 		 Aspen Aerogels
Moderated Discussion A moderated discussion will be held on relevant topics of mutual interest to the group.
 		 Moderator Moderator
1:00 pm - 4:30 pm
Performance Optimization
Breakout Session
 		 Lime-based Circulation Dry for Existing Coal-fired EGUs Scrubber to Comply with the Proposed Utility MACT This presentation will discuss recent experience with lime-based Circulation Dry Scrubber (CDS) technology with reference to performance at the AES Greenidge Station Unit #4
 		 Shaw Tsieng Graymont Lime Co.
Moderated Discussion A moderated discussion will be held on relevant topics of mutual interest to the group.
 		 Moderator Moderator
1:00 pm - 4:30 pm
Ash Handling & Transfer
Breakout Session
 		 Tips and Recommendations for Planning and Executing the Refurbishment of a Coal-Fired Boiler Baghouse  This presentation reviews the three main stages of executing the change-out of filters in a reverse-air and pulse-jet style boiler baghouse:  planning, execution and start-up/ongoing maintenance best practices. The presentation will provide real life examples and actionable recommendations that can help you optimize your next baghouse outage. Tim Stark
Applications Engineer		 GE Energy, Filtration Technologies
Moderated Discussion A moderated discussion will be held on relevant topics of mutual interest to the group.
 		 Moderator Moderator
Wednesday September 14 8:00am - 10:00am
Plenary Session		 Comparison of Two Semi-Dry FGD Technologies:
Spray Dryer Absorber (SDA) vs. Circulating Dry Scrubber (CDS)
 		 Burns & McDonnel will compare and contrast the basic features  of SDA and CDS technologies Jeromy Jones   Burns & McDonnell
Characterization and Utilization Potential of Dry Flue Gas Desulfurization Materials The increased production of dry FGD process byproduct material is anticipated to be a challenge to industry A summary of current and potential commercial uses as identified through the literature search will be presented, and these uses will be categorized based on the characteristics of dry FGD materials most suited to specific applications. Recommendations on the best options to increase the most beneficial utilization of dry FGD materials are presented.
 		 Loreal Heebink
 		 Energy & Environmental Research Center
University of North Dakota
Plant Reports
Session 2		 A series of briefings will be presented by dry scrubber users. Each briefing provides an overview of scrubber operations and describes a particular challenge presently faced or recently overcome.
 		 TBD TBD
10:15 am - 12:00 pm
Technology Specific
Breakout Sessions
 		 B & W / Niro Technology A moderated discussion will be held on relevant topics of mutual interest to the group.
 		 Moderator Moderator
Alstom  Technology A moderated discussion will be held on relevant topics of mutual interest to the group.
 		 Moderator Moderator
Other Semi-Dry Scrubber Technologies A moderated discussion will be held on relevant topics of mutual interest to the group.
 		 Moderator Moderator
Circulating Dry Scrubber (CDS) Technology A moderated discussion will be held on relevant topics of mutual interest to the group.
 		 Moderator Moderator
Next Generation NID for PC Market  The NID Dry Scrubber System is an advanced dry scrubber process that was developed by Alstom starting in the late 80's with commercial units in operation since 1996.  The system allows for SO2 removal rates greater than 98% with the ability to operate with high Sulfur fuels that would be beyond the capabilities of traditional SDA dry scrubber systems.  This presentation will provide on overview of the NID system, highlight recent developments in the technology, and introduce several NID reference units within the U.S. and Europe as well as a few new projects currently in execution.
 		  Lawrence Gatton, Principal Process Engineer  Alstom Power, ECS 
1:00 pm - 5:00 pm PLANT TOUR 2
Gainesville Regional Utilities
Deerhaven Generating Station
Unit 2 Circulating Dry Scrubber

 
Thursday
September 15		 8:00 am - 10:15 am Dry Scrubber Users Association Annual General Meeting
8:30 am - 10:15 am
Plenary Session		 Circulating Dry Scrubbers Comply with EPA Maximum Achievable Control Technology Limits The SO2 emissions for four units recently retrofitted with Circulating Dry Scrubbers (CDS) were below the proposed Maximum Achievable Control Technology (MACT) limits as measured with stack continuous emission monitors.  There are important questions about the EPA limits including the test methods and the basis of the limits.   What scrubber performance is required to meet the mandate?  These and other questions are discussed. Terence Ake Babcock Power
Spray Dryer Absorber vs. Circulating Dry Scrubber Worley Parsons will compare and contrast the basic features  of SDA and CDS technologies
 		 Gary Grubbs Worley Parsons
Demonstration of Amended Silicates Mercury Sorbent in Units Equipped with Dry Scrubbing Equipment Amended Silicates is a novel, non-carbon based mercury sorbent that features a natural mineral substrate, which provides several advantages.  Among those are its concrete compatibility (demonstrated in earlier trials) and nonflammability. Novinda Corporation has conducted an extensive series of trials at a utility with two units equipped with spray dryer absorbers for SOx control followed by pulse-jet baghouses. We have shown that Amended Silicates is fully compatible with SDA operation, including no impact on recycle, and have demonstrated high mercury capture at cost-effective injection rates. The presentation will discuss the plant configuration and present mercury capture results for the two units tested to date.  James Butz
Michael Lucarelli		 Novinda Corporation
 
10:15am - 11:30am Vendor Exhibits and Networking Session