Grimethorpe High-Temperature/High-Pressure Gas Filter Experimental Program
This report presents the results together with a preliminary assessment of the performance of an EPRI high-temperature, high-pressure (HTHP) filter module containing an array of 130 porous ceramic elements. The module operated on combustion gases from the Grimethorpe PFBC, typically at 850{degrees}C and 10 bar, which passed through a cyclone prior to entering the filter module. In contrast with cyclones, an effective HTHP filter would satisfy environmental regulations regarding atmospheric dust emission, as well as provide additional protection from erosion to a downstream gas turbine. Tests were performed to study not only the filtration performance but also the durability of the filter elements. A considerable amount of instrumentation was fitted into the filter module in order to observe the cyclic pressure and temperature effects caused by the cleaning pulses of cool compressed air. The energy consumption of the filter and the fluid dynamics of the reverse-jet-cleaning pulses were investigated. The filter operated for just over 850 hours, treating dust concentrations ranging from 900 to 3500 ppmw and size distributions with mean particle sizes of 2 to 6 microns. The face velocity of the gases treated ranged from 0.01 to 0.07 m/s, leading to a maximum gas flow rate of 4.5 kg/s. The resulting pressure drops across the tubesheet ranged from 25 to 260 mbar. During normal operation, the maximum dust penetration through the filter was 16 ppmw, which is well below the present US air emission limits. The length of the operation and the range of the experimental parameters make the HTHP filter trials at Grimethorpe the MOSL significant by far on the world scene to date.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (United States); Grimethorpe PFBC Establishment (United Kingdom)
- Sponsoring Organization:
- EPRI; Electric Power Research Inst., Palo Alto, CA (United States)
- OSTI ID:
- 7153357
- Report Number(s):
- EPRI-TR-100499-Vol.2
- Country of Publication:
- United States
- Language:
- English
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COAL
FLUIDIZED-BED COMBUSTION
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FILTRATION
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EXPERIMENTAL DATA
FLOWSHEETS
GAS TURBINES
MEDIUM PRESSURE
OPERATION
PRESSURIZATION
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TEMPERATURE RANGE 0400-1000 K
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CHEMICAL REACTIONS
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