
GTI's Fume collection hood and
baghouse system consists of a hood enclosure and baghouse, with ductwork of PVC. Air
flow is determined using the method outlined in the American Council of Governmental
Industrial Hygienists handbook on industrial ventilation.
Please be aware that a permit to construct is
usually required for air control equipment, and we will assist you in filing the
necessary documents.
Hood Enclosure
The hood structure is composed of three or four parts depending
on kettle orientation.
1. Floor Mounted
Structure
The floor mounted truss structure is supported
on columns on the working side of the kettle which in turn supports sliding doors along
the side of the kettle. The opposite side of the kettle is enclosed by a similar
structure which also supports sliding doors, and the ends of the kettle are served with
gate type doors which open away from the working side. The sliding doors are suspended
on ball bearing rollers mounted in track, and the end doors are mounted in ball
bushings for ease of operation.
2. Crane Mounted
Curtain - Perpendicular arrangement only
The bridge crane supports a hanging curtain
fabricated from PVC warehouse door strips that reach down to the top of the floor
mounted truss. When the bridge crane is in position over the kettle, this hanging
curtain forms the middle portion of the hood. (This is not necessary on a
parallel kettle orientation served by a monorail.)
3. Roof Mounted
Curtain
A similar arrangement of PVC strips or sheet
metal panels encloses the area from the ceiling down to the top of the bridge crane (or
the top of the floor mounted hood in the case of a parallel kettle). When the
crane is in position above the kettle, this hanging curtain completes the hood
enclosure.
4. Roof Mounted
Plenum
A plenum constructed of the same material as the
building roof which is approximately 4 feet square and the length of the kettle is
positioned on the roof above the kettle. A slot 8 to 12" wide is cut in the roof along
the length of the kettle, and fumes from the kettle are drawn into the plenum by the
baghouse suction.
Baghouse
The baghouse is sized according to the hood volume,
and GTI baghouses are made in modules with a capacity of 8,000 SCFM each. The air
flow may be determined by multiplying the hood volume in cubic feet by 7. This
will give the recommended number of air changes each minute.
Bags - 156 bags in each chamber - 5" dia. by 9'-2" polyester
fabric
Approximately 2000 sq. ft. cloth area each chamber
Bag Cleaning - manual shaking based on pressure drop combined with
a sonic horn
Blower - 8,000 cfm @ 6"wc - 15Hp 480/3/60 with weather
cover
Precoat - Furnished with GTI automatic precoat unit
Manometer - 0 - 8" wc
Finish - interior and exterior epoxy painted
Electrical - motor starters (25Hp & 1Hp) are furnished by
client
Ductwork - 24" diameter PVC ductwork will be specified from the
roof mounted plenum to the baghouse inlet