They are metal joints about 8 feet by 30 feet and

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to be replaced. They are metal joints about 8 feet by 30 feet and cannot be replaced in one piece. Investigation is required to see if the newer design of high temperature fabric joints can function in this location and, if not, how metal replacement joints can be installed. In September, prior to the Fall outage, a specification for engineering services was sent out for bid. The RFP requested services to investigate the problem, determine a way to stop the water ingress, determine the method of duct repair, investigate economizer and precipitator expansion joint material and replacement, and prepare specifications for bid to contractors. After the outage, it was determined that this scope was not entirely correct since duct deterioration was less
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than expected and the precipitator expansion joints are in good condition. It was decided that the platform at the economizer outlet needs to be extended to prevent workmen from walking on the lagging and expansion joint cover while maintaining the oxygen sensors and flue gas analyzer. The precipitator inlet distribution baffles need to be replaced or modified.
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  • Spring '12
  • A.Young
  • Work, Thermal Expansion, Expansion joint, Expansion Joints, Precipitator Duct

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