Testing and verification of granular filters for removal of particulate and alkalies. Final report

Technical Report · Sun Apr 01 00:00:00 EST 1984

OSTI ID:6020663

This report describes the testing and evaluation of a shallow bed granular filter (GBF) concept for Pressurized, Fluidized Bed Combustion (PFBC) application. The GBF is a device on which the dustladen gas passes through a shallow bed of granular media, depositing the particulate matter on the surface of the bed forming a dust cake. The bed media is cleaned by a reverse flush that gently fluidizes the bed and elutriates the collected particulate matter from the system. A 500 acfm subpilot scale GBF was built and tested at simulated PFBC operating conditions. Two different GBF configurations have been evaluated accounting for over 220 hours of testing (cumulative) and 615 cleaning cycles. Test variables have included bed media, filter flow face velocity, backflush conditions and dust loading. In addition to the subpilot scale test work, a modified single bed, bench scale GBF unit was evaluated as an improved design approach for PFBC conditions. Results of this work showed that the overall performance of the GBF can be improved if the system can be cleaned without fluidizing the bed media. This has resulted in redefining backflush conditions and the choice of bed media. The possibility of utilizing the GBF to remove both particulate and alkali has also been explored. Implementing an alkali gettering media as part of the GBF bed media would be possible but would require significantly deeper beds than anticipated in the current shallow bed, GBF concept. 27 references, 135 figures, 40 tables.

• Research Organization: Westinghouse Electric Corp., Pittsburgh, PA (USA). Research and Development Center
• DOE Contract Number: AC21-80ET17093
• OSTI ID: 6020663
• Report Number(s): DOE/ET/17093-1741; ON: DE85007168
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
• Country of Publication: United States
• Language: English

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