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INDUSTRIAL VENTILATION DUST COLLECTION SYSTEM DESIGN

HOOD ENCLOSE-BELT,GRINDING WHEEL

 

ENCLOSING HOOD -EXHAUST HOOD LOCATION
Enclose operation as much as possible.More closing means less air for exhaust
 
Locate & shape hood so velocity of dust will throw it into hood opening directly

 

 

Where ;
Capture Velocity V fpm Air velocity at any point in front of the hood or at the hood opening ,neccesary to capture the contaminated air at that poinby causing it to flow into the hood.
       
Face Velocity Vf fpm Air velocity at the hood opening
       
Slot Velocity Vs fpm Air velocity through the openings in a slot type hood
       
Plenum Velocity Vp fpm Air velocity in the plenum
       
Duct Velocity Vd fpm Air velocity through the duct after hood.
       
Transport Velocity Vt fpm Minumum air velocity through the duct required to move particules in air stream.
       
Dust Distance X ft Distance outward along center axes of hood.
       
Air Flow Q cfm Required minumum air flow to capture dust particles
       
Area A ft2 Area of hood opening
       
Diameter D ft Diameter of round hoods

Dust Exhaust system Hood Entry Losses Table

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