Extremely small particles (less than 1 μm in diameter) can be efficiently collected in a baghouse.
Emission regulations for various industries including municipal waste combustors and
hazardous waste incinerators require emission limits of 0.010 gr/dscf. Baghouse units
designed with overall collection efficiencies of 99.9% (varying particle sizes) are common.
Exhaust air from many baghouses can even be recirculated back into the plant for heating purposes,
as long as the gas stream is not toxic.
Baghouses are not normally designed with the use of fractional efficiency curves as are some
of the other particulate emission control devices. Vendors design and size the units strictly on
experience. The baghouse units are designed to meet particulate emission outlet loading and
opacity regulations. There is no one formula that can determine the collection efficiency of a
baghouse. Some theoretical formulas for determining collection efficiency have been suggested,
but these formulas contain numerous (3 to 4) experimentally determined coefficients in
the equations. Therefore, these efficiency equations give at best only an estimate of baghouse
performance.
Emission regulations for various industries including municipal waste combustors and
hazardous waste incinerators require emission limits of 0.010 gr/dscf. Baghouse units
designed with overall collection efficiencies of 99.9% (varying particle sizes) are common.
Exhaust air from many baghouses can even be recirculated back into the plant for heating purposes,
as long as the gas stream is not toxic.
Baghouses are not normally designed with the use of fractional efficiency curves as are some
of the other particulate emission control devices. Vendors design and size the units strictly on
experience. The baghouse units are designed to meet particulate emission outlet loading and
opacity regulations. There is no one formula that can determine the collection efficiency of a
baghouse. Some theoretical formulas for determining collection efficiency have been suggested,
but these formulas contain numerous (3 to 4) experimentally determined coefficients in
the equations. Therefore, these efficiency equations give at best only an estimate of baghouse
performance.
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