FGD
and DeNOx
NEWSLETTER
June
2007
No. 350
Pump Hot Topics were Availability and Pump Materials
On April 5 pump experts provided alternative views on pump materials but did agree that there is a current supply problem. The first presentation was by George Jenkins of Idex. Handling ammonia in all its forms (anhydrous, aqueous and urea) is a challenge and one that Idex has successfully met.
The scrubber recycle pump was the focus of the remainder of the 90 minute recorded session. Jim Burke of Weir led off with insights based on a very large scrubber pump base. Steve Lindgren told the participants that GIW/KSB manufactures an all-metal pump and one with a ceramic/polymer lining. Allan Abbott indicated that Flowserve has met good success in China with their FGD pump. Mike Agosti of Lawrence related that the Düchting SIcast pump is being offered in North America. An order for Vectren for 20 pumps is presently being processed.
There was a very interesting exchange among the pump suppliers relative to availability of pumps. If you want to start up a scrubber in 2010 and haven’t ordered a pump yet, then you can eliminate several of the largest suppliers from your bidders list. Pumps are one of the first major components to be shipped to a site and can therefore precede startup by one or two years.
Rubber lining, hard metal, and ceramic lining all have been successfully applied. Conditions such as chloride levels are variables which may enter the decision making between one material and the other. Mechanical seals were another focus of discussion. The seals are to some extent the Achilles heel. Therefore proper design and selection is important.
Summaries of some of the company presentations follow. You can access the Hot Topic Hour presentations in the NOx Decision Tree by following
Start►NOx Removal ► Physical ► Components ► Pumps ► Sources ► Index
and in the FGD Decision Tree by following
Start ►Scrub ► Physical ► Component Specification ► Pumps ► Sources
Back to FGD and DeNOx Newsletter No. 350 Table of Contents