CDS vs SDI vs SDA

CDS vs. SDI vs. SDA in Dry Scrubber Hot Topic Discussion Yesterday

The Dry Scrubber Hot Topic Hour Webinar on October 23, 2014 contained valuable decisive classifications as well as little known facts and insights. This positive result was the work of some very experienced and knowledgeable individuals.

The Dry Scrubbing - Continuous Analyses website is free of charge and is also part of Power Plant Systems and Components, which is free to power plants around the world. The goal is to make the McIlvaine website the default starting point for owners and operators of air pollution control equipment throughout the world. About 20 percent of the session was devoted to China. Paul Farber, who was the keynote presenter will be in Thailand conducting a training course early next year and will make sure that his students are aware of this site.

KC Cottrell as a presenter talked about installations in Taiwan, Korea, and China.

Successes on the hybrid SDA-DSI are the work of B&W in the U.S. and GEA in Europe.

No one area of the world has a monopoly on dry scrubber knowledge. The reality is that China, with hundreds of dry scrubber installations, has accumulated knowledge which puts it on equal footing with the U.S., European, and Japanese companies which originally brought the dry scrubbing technology to China.

Regarding the development of the expertise, Joe Riley of BoldEco cited some of the early European work by Solvay and the BoldEco European partner as the first sodium dry scrubber installation. The first power installation known to the McIlvaine Company came as a result of a bid request by a western U.S. utility. They wanted an alternative to the wet limestone approach and were willing to fund three pilot plants using spray driers. Niro teamed with Joy and became the early developer of the spray drier technology. In recent years, B&W has acquired this technology.

Mike Widico and Kevin Cosman of KC Cottrell presented a number of positive features about their design. It is compact and even with the cyclone can be fitted into most power plants. Because of the cyclone to capture the calcium sulfate, the downstream precipitator is not contaminated by large quantities of high resistivity dust.

Paul Farber provided a valuable overview with decisive classification of the alternatives. Each of the three options has some advantages and some disadvantages. Spray Dryers are less costly than circulating dry scrubbers but have more limited SO₂ removal capability. Paul was asked about the potential of the hybrid DSI–SDA to improve this capability. He is of the opinion that this combination will expand the range for SDA.

Next came a discussion of the Dry Scrubber Users Conference with Shawn Veurink of RPM who is the treasurer of the organization. The meeting last month combined topical discussions, vendor displays and plant presentations such as Sherco 3 Plant Report. Larry Glass, Engineer Sherburne County Generating Plant, combined topical discussions, vendor exhibits and papers such as these.

Michael Polachek, - Technical Manager PSEG Fossil
Dry Scrubber Layup Strategies

Craig Henry
JW Turk Plant Report

Darren Farnworth, (Regional Sales Mgr., SST Enviro Corp Solutions)
Significant Improvements Made in Lime Slurry Preparation for Use in SO₂

Jeff Lester

Comanche Station Plant Report

John Kersch (Maintenance Manager, NAES Corp. Logan Generating Company)
Logan Generating Plant Scrubber Optimization Project

Jim Butz (VP Product Management, Novinda Corporation)
BOP Impact of Amended Silicates for Mercury Control

Steve Rudolph and Michael Polachek
PSEG Mercer & Hudson Plant Report

The meeting next September will be in Rapid City, SD where the attendees will be dining with the presidents on Mt. Rushmore.

Shawn also provided a set of power points on RPM Solutions activities. He was asked about methods to ensure the operability of the rotary atomizers. RPM has a monitoring program which includes real time monitoring and data collection.

Jianchun Wang of Lonjing Environment Technology provided details on the Hangfeng Project. The installation has exceeded the guarantee limits. SO₂ removal is 93 percent.

An earlier paper by Longking dealing with various valuable end products produced from CDS calcium sulfate was also quickly reviewed. The Chinese are ahead of the rest of the world in this area. This paper is being uploaded to the website.

ITPE in China has licensed MET in the U.S. to supply its circulating dry scrubber with two humidification stages. Here is the paper already on the site.

Over 140 installations of MET/ITPE dry scrubber

Joe Riley of BoldEco provided insights into the use of spray cooling and size reduction of reagents and how they are enabling hazardous waste incinerator operators to reach SO₂ emissions as low as 1 or 2 ppm.

The information on the hybrid SDA-DSI was posted to the site earlier. It covers work of B&W in the U.S. and GEA in Europe. GEA acquired Niro some years ago and is a major worldwide spray drier supplier.

Boosting SDA efficiency with DSI at Wygen 3

Individual presentations follow:

Dry Scrubbing Webinar - Hot Topic Hour October 23, 2014