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Purge blowers pressurize the insulator compartments, or penthouses, to maintain the cleanliness of the housed components. Uninterrupted purge blower operation is critical to precipitator systems that operate under positive pressure. They are frequently used, and often recommended, for ESP systems that operate under negative draft to prevent contamination during startup and shutdown conditions when pressure fluctuations occur. Most negative draft systems that do not utilize a blower system have purge openings and rely on the negative draft to purge the compartments. Most systems incorporate some type of heating, either insulator band or ring heaters and/or heaters integral to the blower to limit condensation contamination and prevent thermal shock of the insulators. Failure of the purge and/or heating system is a major cause of insulator failure.
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Last updated: May 27, 2011.
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Services, Inc. All rights reserved.
For more information contact: TRK Engineering Services - 95 Clarks Farm Road - Carlisle,
MA 01741 - Telephone: 978-287-0550 - Fax: 978-287-0569 - email: trkeng@apcnetwork.com