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TABLE TWO BAGHOUSE TROUBLE SHOOTING
NET CHARGER FOR CONSTRUCTION

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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TM 5-3895-374-24-2 FEBRUARY 1993 TABLE TWO (CONT) BAGHOUSE TROUBLE SHOOTING SYMPTOM CAUSE REMEDY 4. Dust escaping at Low air volume. See above source. Ducts leaking Patch leaks so air does not bypass source. Improper hood design Close open areas around dust source.  Check for cross drafts that overcome suction.  Check for dust being thrown away from hood grinding wheel. 5. Dirty discharge at Bags leaking Replace bags.  Tie off bags and stack replace at later date(or block off) Isolate leaking compartment if allowable without upsetting system. Bag not sealing Check for proper bag installation Failure of seals in Caulk or weld seams joints at clean/dirty air connection. Insufficient filter cake Allow more dust to build up on bags by cleaning less frequently .  Use a precoating of dust on bags. GENERAL.  DISCUSSION - Static pressure interpretation. The velocity pressure at any point of measurement is a function of the velocity of the air or gas and its density. The static pressure at a point of measurement in the system is a function of system design (resistance to flow) air density and the amount of air flowing through the system. The  static  pressure  measured  in  a  "loose"  or  oversized  system  will  be  less  than  the  static  pressure  in  a  "tight"  or undersized system for the same airflow rate. In most systems, pressure measurements are indicators of how the installation is operating These measurements are the result of air flow and, as such, are useful indicators in defining system characteristics. Field static pressure measurements rarely correspond with laboratory static pressure measurements unless the fan inlet and fan outlet conditions of the installation are exactly the same as the inlet and outlet conditions in the laboratory. page 3-700







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