Coal gen 2011 wet fgd performance upgrade at b.l. england unit 2
1. A Recent Case Study of Wet FGD Performance Improvements At B.L. England Unit 2 using ALRD® Technology Presenters: Amy Evans, Marsulex Environmental Technologies Dennis Del Vecchio, NAES Corporation
2. Acknowledgments BL England Staff & Management Eric Adolfsen | BL England Plant Engineer Dennis Prichett | BL England Scrubber Supervisor Authors Mike Hammer | Marsulex Environment Technologies Amy Evans | Marsulex Environment Technologies Dennis Del Vecchio | NAES / RC Cape May Holdings Gary Andes | WorleyParsons
3. Agenda Plant Background and Administrative Consent Order (ACO) Upgrade Options Implementation and Constructability Performance Results Conclusions
4. B.L. England Cape May County, NJ on the Great Egg Harbor River 450 MW plant 3 generating units (2 coal, 1 oil) Unit 2 155 MW, balanced draft Equipped with FGD, ESP, LNB, SNCR Eastern bituminous coal (3.2% S) FGD LSFO Wallboard grade gyp, sold locally Retrofitted in 1994 with open spray tower WFGD system Designed for 93% SO2 removal
10. Solves flue gas “sneakage” along absorber wallMinimal effect on flue gas pressure drop
11. ALRD Technology Recommended technology for B.L. England Unit 2: Two ALRD levels determined to meet removal requirements Could be incorporated into two scheduled outages Determined most cost and schedule effective method
28. Constructability Developed execution plan during proposal Reviewed contractor and owner safety plan, described construction work plan, resource histogram, reporting and tracking requirements All workers attended a Site safety orientation presentation Fire blankets and fire watch were critical for a rubber-lined vessel Workers required to wear harnesses when in vessel for protection from falling Workers used the “Buddy System” to help insure a safe working environment Project risks reviewed and mitigation strategies implemented
32. Needed to protect rubber lining on pipe header, spray nozzles, and absorber vessel walls
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36. Execution of Work Tower scaffolding was installed on top of the spray headers and the attachment plate locations were laid out The rubber lining was removed
37. Execution of Work The shell was prepped for welding The bracket was made of CS base plate and shop welded to the alloy bracket for easy field welding
38. Execution of Work All of the support brackets were installed and aligned using the actual plates All welding was completed before any of the rubber lining efforts were began
39. Execution of Work The ALRD support bracket shell and rubber lining was beveled to ensure proper lining profile All the lining efforts were completed before the plates were installed
40. Execution of Work The plates were installed, bolting was selected as the preferred method of attachment The plate was lined to seal it to the wall to ensure all the liquid running down the wall could be re-entrained
41. Execution of Work The work area was cramped but all work was performed without incident or any lost time