AAF International Millennium - Manual (Page 3)

Support legs are designed for 130 mph wind or Universal Building
Code seismic zone 4 loading, and are available for hopper clearances
of 4, 6, 8, and 10 ft. Up to five modules may be bolted together
and supported by one set of 4 legs. Standard design is for 4 ft.
hopper clearance.
The standard Millennium is supplied with a pyramid style hopper.
A trough style hopper is available as an option. Pyramid hoppers
have a minimum side slope of 60 degrees and a flanged outlet of
12" x 12" with a drilling that matches an optional Rotary Lock. The
trough hoppers have a 10" wide opening with drilled flanges for
conveyor mounting. Both types of hoppers have quick release lift-off
access doors.
The outlet plenum can be either open to roof top access or
walk-in style. Outlets may be located at either end of the plenum,
and have a 2'-1" x 8'-4" opening with a standard drilling as shown
on the drawings.
2.0 General Description
The Millennium is a modular, continuous, automatic, self-cleaning,
fabric pulse-jet dust collector. The standard module is an open top
design. Flanges inside the roof top doors prevent water from leaking
into the housing. The access doors are lift-off type. Each size 96
module has two doors; while the size 144 module has three doors.
The walk-in plenum design will have one 20” x 60” access door
opening at one end of the unit, opposite the air discharge opening.
Handrails and ladders are supplied with both plenum types. An
optional air and solenoid valve service platform is available. The
access ladder is selected to accommodate both bag length and
hopper clearance. On a standard roof top access unit, using a 12 ft.
bag with a 10 ft. hopper clearance, or a 14 ft. bag with either an 8 or
10 ft. hopper clearance, the access ladder is supplied in two sections
with an intermediate platform, to comply with OSHA regulations.
The cleaning cycle is controlled by a solid-state timer located in a
NEMA 4 enclosure. The timer control can be field adjusted for proper
operation. (See Bulletin E-97)
All modules are constructed with a 6" diameter surge tank
(compressed air manifold) which is fitted with 1 1 2 " diaphragm pulse
valves. Pulse valves are connected to solenoid pilot valves with
plastic tubing on standard units, and with metal tubing on high
temperature units. See figure 3 for details of the compressed air surge
3
1.4 The Millennium - A Description
The standard Millennium collector comes in 14 basic sizes. The size
variations are composed of combinations of either 96 bag or 144 bag
modules, with one to five modules per unit. The Millennium will use
5 1 4 " diameter bags in a 7" x 7" spacing pattern. Bag lengths of 8, 10,
12, and 14 ft. are available.
Standard module combinations are listed below. The 96 bag modules
are indicated as “96” and the 144 bag modules as “144”. The letter
designation refers to the diagram shown above in Figure 2.
There is no limit to the size collector that can be supplied.
However, any arrangements exceeding the combinations listed
above will require intermediate support legs and additional outlets
in order to maintain acceptable airflow velocities. See contract
drawings for details.
The modular design will permit an existing Millennium system to
be expanded with no significant disruption to the operating unit(s).
Housings, hoppers, plenums, and tube sheets are made of 10 ga.
carbon steel. Modules are available for -20" and -30" w.g. plenum
pressure, and for temperatures of 180, 270, and 400 degrees
Fahrenheit. Consult the P.O. and submittal documents to verify
which version you have.
Size Module Arrangement
96 D96
144 D144
192 A96 + C96
240 A96 + C144
288 A144 + C144
336 A96 + B96 + C144
384 A96 + B144 + C144
432 A144 + B144 + C144
480 A96 + B96 + B144 + C144
528 A96 + B144 + B144 + C144
576 A144 + B144 + B144 + C144
624 A96 + B96 + B144 + B144 + C144
672 A96 + B144 + B144 + B144 + C144
720 A144 + B144 + B144 + B144 + C144
Figure 2
Alt.
Outlet
Alt.
Outlet
Std.
Outlet
Std.
Outlet
A B B B C D
Inlets Inlet