Grand_Island_Precipitator_Revision

Grand_Island_Precipitator_Revision - City of Grand Island...

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City of Grand Island Working Together for a Better Tomorrow. Today. Interoffice Memorandum Utilities Department To: Tim Luchsinger From: Dave Kuhlman Subject: Engineering Services for Precipitator Duct and Expansion Joint Modification Date: November 9, 2001 Introduction We have experienced problems with the precipitator that removes fly ash from the boiler exhaust gas at the Platte Generating Station, with plant outages in Spring and Fall 2001. We have developed specifications for engineering services to resolve these problems and received proposals from three engineering firms in response to these specifications. This report presents the problems, the specifications, and our recommendations. Summary The problems are the buildup of fly ash in the precipitator and ducts, the recent plant outages due to this buildup, and the failure of two previous attempts to resolve the problems. The specifications, recently revised, detail the work necessary to address these problems satisfactorily. Of the three engineering firms that responded to our specifications, we recommend Sargent and Lundy as the most capable firm with the lowest bid. Precipitator Problems For many years the plant has experienced precipitator problems with ash build up in the first field and on the inlet distribution plates. Plant maintenance people and contractors have repaired cracks in the metal ducts and expansion joints and welded plates over areas of corrosion in the ducts. During plant outages in Spring and Fall 2001, observers have seen moisture in the precipitator and ducts, which
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This note was uploaded on 03/02/2012 for the course SCIENCE 1120 taught by Professor A.young during the Spring '12 term at Canadian University College.

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Grand_Island_Precipitator_Revision - City of Grand Island...

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