Recordings

January 18, 2007

Mercury PAC Handling Problems Resolved

This is the happy news we heard in our phone/web interview with Steve Derenne of We Energies. Not only are we conducting our regular weekly “Hot Topic Hours,” but we are also recording interviews with utilities that can provide the latest insights on technology development.

We are not CNN, but we can turn a story around in short order. For example, we e-mailed all our subscribers in the morning relative to the interview in the afternoon. Seventeen people were able to participate on this short notice. The hour-long interview was recorded and it, along with all the “Hot Topic Hour” discussions, is accessible through the Power Plant Air Quality Decisions home page.

This quick turnaround has big possibilities. Utilities can request discussion on a pressing issue and, if we think it is of interest to the industry, we can create a conference in 24 hours or less.

Corrosion Materials Hot Topic Recording Available in Three Segments

Last week our “Hot Topic Hour” on corrosion materials turned out to be a marathon six hours. However, the 63 participants in the first three hours were enthusiastic about continuing. As a result, 43 joined the discussion again in the afternoon. Eighteen people also participated in the final hour the next day. This recorded discussion will provide the background and latest applications for the alloys, linings, and FRP for scrubbers, ducts, stacks, piping and WESPS. There was also comprehensive data on atomizers and SDA scrubber corrosion.

Is High Velocity Scrubber Alternative Better?

More than 50 people including several utilities, a number of A/Es, system suppliers from around the world, government officials, and others joined the January 18 Hot Topic Hour to talk about the design of limestone scrubbers.

If there was one point on which all would agree it was that improvements can be made to an open spray tower operating at 12 fps. The approach used by Marsulex is to eliminate the sneakage of raw gas up the walls with baffle rings mounted at intervals. Babcock Power has several methods including the nozzle spray pattern to eliminate the sneakage and improve performance.

Hitachi and Advatech (Mitsubishi) opt for much higher free space velocities and the resultant turbulence to create higher efficiency and more positive gas liquid contact. Ducon uses a rod deck with the gas moving upward through the space between rods at the same time the slurry is trying to move down through the space.

Each of the five companies provided considerable data to support certain proprietary advantages. A key to the higher velocity in the spray tower is the ability of the mist eliminator to separate the droplets. Koch-Glitsch says this is not a problem. In fact they can handle up to 25 fps with new designs.

Some scrubber companies have their own nozzle designs but others use commercial designs. Both Lechler and Bete provided performance data on improved nozzle designs.

We are providing links directly to the power points used in the Hot Topic hour yesterday. These power points have been added to the relevant branches of the FGD Decision Tree.

Hitachi – Joe Barba

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Products

Continuing Decision Process For: Products

Design features of Hitachi spray tower.

http://www.mcilvainecompany.com/FGD_Decision_Tree/subscriber/Tree/DescriptionTextLinks/Hitachi spray tower Hot Topic Hour Jan. 18.htm

URS - Greg Brown

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Products

Continuing Decision Process For: Products

Mitsubishi and its joint venture partners, including Advatech in the U.S., offer a one- or two-stage scrubber design. Other features include elimination of the hydrocyclones through higher solids slurry and claims for higher particulate removal than in standard spray towers.

http://www.mcilvainecompany.com/FGD_Decision_Tree/subscriber/Tree/DescriptionTextLinks/URSHot Topic Presentation 011907.pdf

Marsulex – Amy Evans

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