Performance and durability evaluation of 3M high-temperature Nextel filter bags

Technical Report · Sat Dec 01 04:00:00 EST 1990

OSTI ID:6123508

Weber, G F ^[1]

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1. North Dakota Univ., Grand Forks, ND (USA). Energy and Environmental Research Center

The purpose of the project was to evaluate the performance/durability of 3M Company's high-temperature Nextel filter bags for application to particulate control requirements for pressurized fluidized bed combustion (PFBC). Phase I involved the design, construction, and operation of a baghouse slipstream system on a stoker-fired boiler at the University of North Dakota steam plant. A total of 1,022 hours of operating time was accumulated on one set of nine woven Nextel filter bags. Baghouse operating conditions were nominally atmospheric pressure and 427{degree} to 510{degree}C (800{degree} to 950{degree}F). Air-to-cloth ratio was nominally 0.9 m/min (3.0 ft/min). Baghouse particulate collection efficiency, as determined from EPA Method 5 sampling, ranged from 99.19% to 99.96%. Filter cleaning was performed using a reverse-air pulse-jet cleaning system triggered by baghouse differential pressure. Phase II was initiated in October 1985 with installation of a second set of nine woven Nextel filter bags. The original intent of Phase II was to operate the baghouse slipstream system for 6,000 hours. As of May 15, 1989, the second set of Nextel bags had accumulated 16,877 hours of operating time and 3,441 cleaning cycles. Baghouse particulate collection efficiency, as determined by EPA Methods 5 and 8, ranged from 99.66% to 99.99% depending on fly ash mass loading and chemical/physical characteristics. Operation of the baghouse slipstream system was terminated on May 15, 1989. Each bag was evaluated for fabric strength (tensile strength and MIT Flex) by 3M Company. 37 refs., 33 figs., 11 tabs.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA); North Dakota Univ., Grand Forks, ND (USA). Energy and Environmental Research Center
• Sponsoring Organization: EPRI
• OSTI ID: 6123508
• Report Number(s): EPRI-GS-7055; CNN: 1336-16
• Country of Publication: United States
• Language: English

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