LABORATORY PERFORMANCE OF THE MIKRO-PULSAIRE COLLECTOR (MODEL J-9-6A)

Technical Report · Fri Jun 15 04:00:00 EDT 1962

DOI:https://doi.org/10.2172/4737932· OSTI ID:4737932

Dennis, R; Kristal, E; Peters, G A; Silverman, L

Performance dnta are presented for a fabric filter (Mikro Pulsaire) cleaned by intermittent reverse air pulses directed into the clean air exit of the filter tube. Results of tests with resuspended fly ash, vaporized silica, and freshly generated iron oxide fume showed that at fabric face velocities of 8 ft per min and inlet dust loading in the range of 1.0 grain per ft/sup 3/ fly ash and vaporized silica could be filtered at constant (equilibrium) resistances, 3 and 5 in. water respectively. No equilibrium resistance could be attained with iron oxide fume, The jet air cleaning system was controlled in three ways by varying (1) compressed air pressure, (2) duration of compressed air pulse, or (3) frequency of pulse application. Test data showed that fabric resistance varied inversely with the square of the compressed air pressure and inversely with the square root of the pulse frequency. Pulse duration had no effect on resistance. Fabric resistance was moderately dependent on dust deposition rate, increasing as the fourth root of the inlet loading. Observations and experimental data indicated that initial flexing of tubes was the principal cleaning mechanism. Calculated reverse air velocity through the fabric appeared too low, 16 ft per minute, to cause significant dust dislodgement. Comparison of the Micro-Pulsaire collector with a Hersey type blow ring unit indicated thnt total power requirements were greater for air pulse cleaning. On the basis of estimated total yearly costs including major capital and operating costs and assuming equal maintenance charges, it appeared that the Mikro-Pulsaire device was less expensive for air handling capacities of 3000 ft/sup 3/ per minute or lower and more expensive for capacities greater than 8000 ft/sup 3/ per minute. However, the manufacturer's claim that air pulse cleaning reduces overall maintenance appears reasonable. It suggests that performance and operating costs would be similar for both air pulse and blow ring type devices in many applications. (auth)

• Research Organization: Harvard Univ., Boston. Air Cleaning Lab.
• NSA Number: NSA-17-008282
• OSTI ID: 4737932
• Report Number(s): NYO-4816
• Country of Publication: United States
• Language: English

Related Subjects

AIR
CANNING
CLEANING
DEPOSITS
DUSTS
ECONOMICS
ENGINEERING AND EQUIPMENT
FABRICATION
FILTERS
FUEL CANS
FUEL ELEMENTS
FUELS
FUSES
HEAVY WATER MODERATOR
HWCTR
IRON OXIDES
LABORATORY EQUIPMENT
MAINTENANCE
MATERIALS TESTING
MEASURED VALUES
MECHANICAL STRUCTURES
NATURAL URANIUM FUEL
PARTICLES
PERFORMANCE
PLANNING
POWER PLANTS
PRESSURE
SHOCK WAVES
SILICON OXIDES
TUBES
URANIUM ALLOYS
URANIUM OXIDES
VAPORS
VELOCITY
WATER
ZIRCALOY
ZIRCONIUM ALLOYS