Compressed Air Best Practices - February 2009 - (Page 15) Focus Industry POWER PLANTS | 02/09 | Typical Bar Chart — Typical Compressed Air Soot-Blowing System with Stacking: “Stacking Considerations” — Operating Parallel Blowers When Possible It is poor practice to blow in the pendant reheat surface at the same time the wall blowers are in use. The control system can be arranged so this will never occur. Blowing an air heater at any time usually has no disturbing effect on the boiler, nor does blowing any horizontal boiler surfaces, which usually includes primary reheater, superheater and economizer surface. The concept of “stacking,” which helps to level load the compressed air system, may create some problems for the boiler, with significant temperature excursions. Larger boilers would experience much lower magnitude of upsets. Pressure requirements vary greatly from lance to lance. Normal ranges are from 135 to 260 psig at the nozzle of the blower. Pressure is related to the cleaning energy (PIP) required for a given area and cooling requirements. Cooling long, retractable lances in higher temperature areas of the boiler uses a substantially greater quantity of air for cooling than for cleaning and at a higher pressure. A high pressure for the long retractable lances is often required to accommodate the pressure drop associated with the high flow rates and long lengths of the blowers. Typical cooling requirements for long retractable lances are: Lance Length 40 ft. 50 ft. Approximate Cooling Requirements 6,000 scfm or more 9,000 scfm or more www.airbestpractices.com 15 http://www.airbestpractices.com
Table of Contents Feed for the Digital Edition of Compressed Air Best Practices - February 2009 Compressed Air Best Practices - February 2009 Contents From the Editor Utility-Air News Compressed Air Audit of the Month Air Standards Instrument Air in Nuclear Power Plants Seven Sustainability Projects for Industrial Energy Savings The Pneumatic Advantage Personal Productivity Resources for Energy Engineers Wall Street Watch Advertiser Index Classifieds Compressed Air Best Practices - February 2009 Compressed Air Best Practices - February 2009 - (Page Intro) Compressed Air Best Practices - February 2009 - Compressed Air Best Practices - February 2009 (Page Cover1) Compressed Air Best Practices - February 2009 - Compressed Air Best Practices - February 2009 (Page Cover2) Compressed Air Best Practices - February 2009 - Compressed Air Best Practices - February 2009 (Page 3) Compressed Air Best Practices - February 2009 - Contents (Page 4) Compressed Air Best Practices - February 2009 - From the Editor (Page 5) Compressed Air Best Practices - February 2009 - Utility-Air News (Page 6) Compressed Air Best Practices - February 2009 - Utility-Air News (Page 7) Compressed Air Best Practices - February 2009 - Utility-Air News (Page 8) Compressed Air Best Practices - February 2009 - Utility-Air News (Page 9) Compressed Air Best Practices - February 2009 - Compressed Air Audit of the Month (Page 10) Compressed Air Best Practices - February 2009 - Compressed Air Audit of the Month (Page 11) Compressed Air Best Practices - February 2009 - Compressed Air Audit of the Month (Page 12) Compressed Air Best Practices - February 2009 - Compressed Air Audit of the Month (Page 13) Compressed Air Best Practices - February 2009 - Compressed Air Audit of the Month (Page 14) Compressed Air Best Practices - February 2009 - Compressed Air Audit of the Month (Page 15) Compressed Air Best Practices - February 2009 - Compressed Air Audit of the Month (Page 16) Compressed Air Best Practices - February 2009 - Compressed Air Audit of the Month (Page 17) Compressed Air Best Practices - February 2009 - Air Standards (Page 18) Compressed Air Best Practices - February 2009 - Air Standards (Page 19) Compressed Air Best Practices - February 2009 - Air Standards (Page 20) Compressed Air Best Practices - February 2009 - Air Standards (Page 21) Compressed Air Best Practices - February 2009 - Instrument Air in Nuclear Power Plants (Page 22) Compressed Air Best Practices - February 2009 - Instrument Air in Nuclear Power Plants (Page 23) Compressed Air Best Practices - February 2009 - Instrument Air in Nuclear Power Plants (Page 24) Compressed Air Best Practices - February 2009 - Instrument Air in Nuclear Power Plants (Page 25) Compressed Air Best Practices - February 2009 - Instrument Air in Nuclear Power Plants (Page 26) Compressed Air Best Practices - February 2009 - Instrument Air in Nuclear Power Plants (Page 27) Compressed Air Best Practices - February 2009 - Instrument Air in Nuclear Power Plants (Page 28) Compressed Air Best Practices - February 2009 - Instrument Air in Nuclear Power Plants (Page 29) Compressed Air Best Practices - February 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 30) Compressed Air Best Practices - February 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 31) Compressed Air Best Practices - February 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 32) Compressed Air Best Practices - February 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 33) Compressed Air Best Practices - February 2009 - The Pneumatic Advantage (Page 34) Compressed Air Best Practices - February 2009 - The Pneumatic Advantage (Page 35) Compressed Air Best Practices - February 2009 - The Pneumatic Advantage (Page 36) Compressed Air Best Practices - February 2009 - The Pneumatic Advantage (Page 37) Compressed Air Best Practices - February 2009 - The Pneumatic Advantage (Page 38) Compressed Air Best Practices - February 2009 - Personal Productivity (Page 39) Compressed Air Best Practices - February 2009 - Personal Productivity (Page 40) Compressed Air Best Practices - February 2009 - Personal Productivity (Page 41) Compressed Air Best Practices - February 2009 - Resources for Energy Engineers (Page 42) Compressed Air Best Practices - February 2009 - Resources for Energy Engineers (Page 43) Compressed Air Best Practices - February 2009 - Resources for Energy Engineers (Page 44) Compressed Air Best Practices - February 2009 - Resources for Energy Engineers (Page 45) Compressed Air Best Practices - February 2009 - Wall Street Watch (Page 46) Compressed Air Best Practices - February 2009 - Wall Street Watch (Page 47) Compressed Air Best Practices - February 2009 - Wall Street Watch (Page 48) Compressed Air Best Practices - February 2009 - Advertiser Index (Page 49) Compressed Air Best Practices - February 2009 - Classifieds (Page 50) Compressed Air Best Practices - February 2009 - Classifieds (Page Cover3) Compressed Air Best Practices - February 2009 - Classifieds (Page Cover4)
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