Lots of Progress on removing SO3 say Hot Topic Speakers

 

Yesterday there were excellent presentations and discussions in a 3-hour webinar on SO3 issues. The conclusion is that removing SO3 down to well below 10 ppm is achievable at a reasonable cost. The nine speakers were experts on the subject.

 

Yougen Kong, Technical Development Manager, Solvay Chemicals Inc.

 

Keith Day, Business Development related to Dry Sorbent Injection, O'Brien & Gere 

 

Geoff Urwin, Proposal Manager with Clyde Bergemann EEC

Edward V. Bowes, Manager, Fossil & Hydro Engineering, Dominion Resources, and Amy Evans, Marsulex 

 

James "Buzz" Reynolds, Vice-Pres./Wet ESP, Siemens Energy, Inc.

 

John C. Caine, General Manager, Southern Environmental, Inc/ SEI

 

Kevin Dougherty, V.P.,  FuelTech

 

Dave Escott, Power Market Manager, FLSmidth

 

Trona and hydrated lime both have advantages. In some cases it makes sense to add Trona prior to the air heater and then lime prior to the wet FGD. Advantages of dry injection include mercury as well as SO3 removal.

 

Ground limestone added at the air preheater is another successful approach which has proved its operational reliability. The effectiveness of removal is a function of temperature reduction across the air heater. Dominion Resources takes advantage of the higher boiler efficiency but is able to raise the air heater exit temperature if there is a failure in the injection system. CO2 reduction and boiler efficiency improvement are proportional. So the ability to improve efficiency without corroding air heater exit ducts is an advantage

 

There were good questions and information provided by the participants. Peter Stromberg of Babcock Power pointed out that while there was lots of research on SO2 removal with dry sorbent injection there was little data on SO3 removal. He pointed out that much of the reaction is between H2SO4 liquid and the sorbent and not between the SO3 gas and the sorbent.

 

The systems to deliver and uniformly distribute sorbent in the flue gas have been made much more reliable. Pneumatic transport of Trona requires gas conditioning. Hydrated lime can build up in areas where there is a pressure change.

 

Magnesium hydroxide can not only capture SO3 but can improve boiler efficiency and reduce the popcorn ash pluggage of the screens protecting the SCR catalyst.

 

Wet precipitators have a higher capital cost but lower operating costs. They also capture heavy metals. With MACT rules for toxics in the offing there will be considerable value attached to this capability. CO2 capture systems cannot tolerate particulate or acid gases. So the WESP will be of particular interest for a utility ultimately contemplating CO2 capture.

 

The bios and abstracts can be viewed as follows: May 7, 2009 Bios, Abstracts, Photos - Hot Topic Hour.htm

 

The power points are in the FGD Decision Tree and can be viewed as follows:

 

Yougen Kong – Solvay Chemicals

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Physical

Multi-pollutant Requirements

Gases

SO3

Sources

Solvay Chemicals

Products

FGD Continuing Decision Process For: Products

Sorbent Injection of Trona for SO3 Mitigation, presented by Yougen Kong. Hot Topic Hour May 7, 2009.

http://www.mcilvainecompany.com/FGD_Decision_Tree/subscriber/Tree/DescriptionTextLinks/Yougen Kong - Solvay 05-07-09.pdf

 

 

Keith Day – O’Brien & Gere

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Physical

Multi-pollutant Requirements

Gases

SO3

Sources

O'Brien & Gere

Products

FGD Continuing Decision Process For: Products

Advancements in Dry Sorbent Injection Systems for SO3 Removal, presented by Keith Day. Hot Topic Hour May 7, 2009.

http://www.mcilvainecompany.com/FGD_Decision_Tree/subscriber/Tree/DescriptionTextLinks/Keith Day - O'Brien & Gere.PDF
 

 

 Geoff Urwin – Clyde Bergemann EEC

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Physical

Multi-pollutant Requirements

Gases

SO3

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Clyde Bergemann EEC

Products

FGD Continuing Decision Process For: Products

SO3 Issues and Answers for Coal-fired Power Plants, presented by Geoff Urwin. Hot Topic Hour May 7, 2009.

http://www.mcilvainecompany.com/FGD_Decision_Tree/subscriber/Tree/DescriptionTextLinks/Geoff Urwin - Clyde Bergemann.pdf

 

Amy Evans - Marsulex

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Physical

Multi-pollutant Requirements

Gases

SO3

Sources

Marsulex

Products

FGD Continuing Decision Process For: Products

The CleanStack Process - SO3 Control Technology, presented by Amy Evans. Hot Topic Hour May 7, 2009.

http://www.mcilvainecompany.com/FGD_Decision_Tree/subscriber/Tree/DescriptionTextLinks/Amy Evans - Marsulex and Edward V. Bowes, Dominion Resources 5-7-09.pdf
 


James “Buzz” Reynolds - Siemens 

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Physical

Multi-pollutant Requirements

Gases

SO3

Sources

Siemens (Wheelabrator)

Products

FGD Continuing Decision Process For: Products

Why Wet ESP? presented by James Buzz Reynolds. Hot Topic Hour May 7, 2009.

http://www.mcilvainecompany.com/FGD_Decision_Tree/subscriber/Tree/DescriptionTextLinks/Reynolds - Siemens 5-7-09.pdf

 

 

John Caine – Southern Environmental

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Physical

Multi-pollutant Requirements

Gases

SO3

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Southern Environmental

Products

FGD Continuing Decision Process For: Products

Membrane WESP, presented by John Caine. Hot Topic Hour May 7, 2009.

http://www.mcilvainecompany.com/FGD_Decision_Tree/subscriber/Tree/DescriptionTextLinks/John Caine - Southern 5-7-09.pdf
 

 

Kevin Dougherty – Fuel Tech

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Physical

Multi-pollutant Requirements

Gases

SO3

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Fuel Tech

Products

FGD Continuing Decision Process For: Products

Controlling SO3, Slag and Fouling, presented by Kevin Dougherty. Hot Topic Hour May 7, 2009.

http://www.mcilvainecompany.com/FGD_Decision_Tree/subscriber/Tree/DescriptionTextLinks/Kevin Dougherty - Fuel Tech 5-7-09.pdf

 

 

 

Dave Escott - FLSmidth

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Physical

Multi-pollutant Requirements

Gases

SO3

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FLSmidth

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FGD Continuing Decision Process For: Products

Reagent Injection Technology, presented by Dave Escott. Hot Topic Hour May 7, 2009.

http://www.mcilvainecompany.com/FGD_Decision_Tree/subscriber/Tree/DescriptionTextLinks/Dave Escott - FLSmidth, Inc. 5-7-09.pdf