Nomad™ Hot Mix Asphalt Plant - Astec Inc.

Nomad Hot Mix Asphalt Plant
CEI Enterprises (a division of Astec Industries) proudly offers
the Nomad series of portable hot mix asphalt plants. Nomad
plants are available in two sizes, designed for maximum
production capacities of 80 or 130 tons per hour.
Designed for portability, durability and reliability, Nomad
plants meet the demands of a variety of small, medium
and large projects that require quality hot mix asphalt.
Nomad asphalt plants come
complete with cold-feed
bins, dryer/mixer, baghouse,
portable asphalt
tank, drag conveyor,
surge bin, and air-conditioned
control house.

A. 8’x10’ cold-feed bins feed different sizes of
aggregate to an integral collecting-conveyor that
runs underneath the bins. Each bin features its
own adjustable gate to control feed rates of the
different sizes of aggregate. The collecting conveyor
drops the aggregate onto a scalping screen
mounted on the dryer/mixer unit.
B. The scalping screen removes any oversized
material from the aggregate and lets it fall away to
the ground. Meanwhile, the screened aggregate
drops onto a slinger conveyor mounted below
the screen. The slinger conveyor carries screened
aggregate to the drying drum. An integral weigh
bridge monitors flow of material to the drum.
Optionally, the scalping screen and weigh bridge
can be mounted on a separate incline conveyor.
A
C. The drying drum rotates on a set of four
trunnions. As the drum rotates, a burner fires a
flame down the center axis of the drum.
A series of flights inside the drum shower
the aggregate through the burner flame to
remove all moisture. Dry aggregate exits the
drum to the unit’s twin-shaft coater.
D. The liquid asphalt tank feeds liquid AC
(Asphalt Cement) to the twin-shaft coater
mounted on the dryer/mixer unit. Liquid AC is
proportioned with extremely high accuracy
by a special two-pump asphalt meter. Massflow
type meters are also available.
E. The twin-shaft coater mixes dried aggregate
with liquid AC to make hot-mix asphalt.
Fines returned from the plant’s baghouse
F
B C
are also added to the mix in the twin-shaft
coater. Additionally, RAP (Recycled Asphalt
Pavement) can be added to the mix through
a special dedicated inlet. Mixed asphalt
discharges into the base of the plant’s drag
conveyor.
F. The baghouse receives the exhaust gas
stream from the dryer/mixer unit. It filters out
dust and small particulate (fines) carried by
the exhaust stream. Fines are returned to the
mix by a screw conveyor.
G. The surge bin holds the mixed asphalt
before it is loaded into a haul truck. Surge
bins are available in either 50-ton or 100-ton
capacity. Each size includes its own drag
conveyor with batcher.
E H
H. The control house contains all plant controls,
which are mounted on a centralized control panel.
A PLC (Programmable Logic Controller) controls
mixing.
2 3
D
G

A
B
The 8x10’ cold-feed bins (A) are mounted on a chassis for
easy portability and rapid setup. e e unit
includes an integral collecting-conveyor
that runs underneath the aggregate bins.
e e conveyor has an inclined extension
that can be folded into a retracted position
for travel. e e unit is available with either
3 or 4 bins.
e e cold-feed bins are designed with
steeply-angled side walls for reliable
feeding of aggregate. Each bin features
an adjustable discharge gate to allow Adjustable discharge gate &
feeder belt with VFD.
throughput of a variety of sizes of aggregate.
e e feeder belt (B) underneath each
bin includes a variable-frequency drive
(VFD) to independently control the feed
rate from each bin.
e e feeder belts empty onto the unit’s
collecting-conveyor (C), which carries
the aggregate to the plant’s scalping screen.
A weigh bridge and calibration divert
chute are normally supplied as standard
on the slinger conveyor (E). As an option,
Inclined extension in retracted
the scalping screen, weigh bridge and position for travel.
divert chute can be mounted on a separate
incline conveyor.
C E
I
The dryer/mixer unit includes several components
that are mounted on a single
portable chassis: Scalping Screen
(D), Slinger Conveyor (E),
Burner (F), Drying Drum (G)
and Twin-Sha Twin-Sha Coater (I).
Aggregate from the collectingconveyor
(C) drops onto the
scalping screen (D). e e screen
is a double-deck design with
replaceable/interchangeable
screens. A xed-position xed-position electric
motor with a vibrating mechanism
vibrates the screen to help
properly-sized aggregate fall
through to the slinger conveyor
below. Oversized aggregate rolls
o o the low end of the screen to a
discharge chute, then drops away
to the ground.
Screened aggregate falls onto
the slinger conveyor (E), and is
discharged into the dyer drum,
just below the burner (F).
e e burner res res a ame ame down the
center axis of the rotating drum.
Scalping screen and discharge
chute on dryer/mixer unit.
D F G
Flights inside drying drum.
e e drum (G) turns on four adjustable, belt-driven trunnions. e e
Nomad plant uses stronger, more
durable trunnions and drum tires
than other plants in its class. Its
drum tires are a full 1” wider than
those on other drum mixers in
its class.
Idlers (H) mounted in the center
of the portable chassis help keep
the drum in proper alignment.
Once inside the drum, aggregate
passes through a series of
ights ights that properly veil the rock
through the burner ame ame to
remove moisture.
Specially-designed ights ights at the
far end of the drum raise the dried
aggregate upward so that it can
drop through an outlet chute to
the twin-sha twin-sha coater (I).
Liquid AC (Asphalt Cement)
is injected into the coater, along
with returned baghouse nes. nes.
P P (Recycled Asphalt Pavement)
can also be added through
a special inlet.
Drum tire, adjustable trunnion
and belt drive.
Burner and slinger conveyor. Idlers keep the drum in position.
Dried
aggregate
Twin-shaft coater.
Returned
baghouse
fines
AC inlet
Finished mix
Inside the coater, two rotating shas shas with mixing paddles mix the aggregate
and nes nes with the liquid asphalt. e e mixed asphalt exits the coater through an
outlet chute, and drops into the base of the plant’s drag conveyor.
Discharge chute of coater drops mix into base of drag conveyor.
4 5
H

Surge Bin Baghouse
The surge bin is available in either 50-ton or 100-ton capacity. Each
size includes its own drag conveyor with batcher. e e conveyor also features a
full-length stairway with platform around the batcher.
e e drag conveyor is built to last. It features a chrome-carbide steel liner for
durability, a heavy-duty drag chain, and segmented sprockets for easy maintenance.
e e conveyor discharge opening is set back from the head sprocket so
that the mix is fully discharged from each ight. ight. is is eliminates carry-over of
residues that can cause excess wear of the head sprocket and chain.
Access panels are provided along the top of the conveyor and on the batcher
for internal inspection and maintenance. Low-level and high-level switches
inside the surge bin prevent over-lling.
over-lling.
Multiple silos, truck scales and load-out printing systems are available.
CEI drag conveyors feature a
chrome-carbide steel liner for
superior durability.
Segmented, bolt-on sprockets
allow for easy maintenance.
The baghouse is mounted on its own portable chassis and
includes air compressor, internal collecting auger, caged ladder and
handrails. e e lower section of the baghouse forms a hopper for collection
of nes. nes.
An inertial separator mounted at the baghouse inlet removes the
majority of dust from the dryer prior to the lter lter bags. Remaining dust
and small particulate adheres to lter lter bags that are suspended internally
from the baghouse roof.
Powerful bursts of air are injected into the lter lter bags to make the dust
break away and fall into the hopper below. e e collecting auger that
runs the full length of the hopper
carries this dust (or nes) nes) out
of the baghouse. Fines are then
returned to the twin-sha twin-sha coater
by a dedicated screw conveyor.
Access panels at the top of the
baghouse allow easy changing of
lter lter bags. e e baghouse also has
multiple access doors for internal
inspection and maintenance.
Baghouse fines are returned
to the twin-shaft coater by a
screw conveyor.
AC Tank
The portable asphalt
tank heats and stores liquid asphalt ce- Metering pump
ment (AC). It also provides hot oil to heat
other components of the plant.
e e tank includes an unloading pump,
two-pump asphalt meter with strainer, hot
oil system with pump, expansion tank and
scavenger coils, burner and re re tube, ladder
and full-access manway.
Standard tank capacity is 15,000 gallons. Other sizes are available.
e e burner and re re tube maintain the temperature of asphalt in
the tank. Output of the burner and re re tube is 800,000 Btu/hour.
Hot oil and electric heating systems are available as options. Other
options include a separate hot oil heater, mass-ow mass-ow metering
system, additive systems and vent condensers for blue smoke and
odor control.
A metering pump mounted on the back of the trailer pumps and
meters asphalt cement from the tank to the drum mixer. e e
meter is a special two-pump design that provides high precision
and accuracy. is is highly-accurate asphalt meter is one of many
features that puts the Nomad plant ahead of others in its class. e e
meter includes a strainer to remove debris from asphalt cement
and to protect the asphalt pumps.
e e hot oil system’s scavenger coils are immersed in hot AC
inside the tank. Heat is transferred from the AC to oil owing owing
inside the coils. e e hot oil transfers heat to piping and other
components of the plant.
Exhaust Level
gauge
ASPHALT
CEMENT
Scavenger coils Expansion
tank
Fire tube
Burner
Hot oil
pump
Unloading
pump
Special two-pump asphalt meter provides high precision & accuracy.
6 7

Control House
Plant controls are mounted on a centralized control panel. Standard control house. Larger sizes are available.
The air-conditioned control house is trailer-mounted
for easy portability. It also includes heating, lights, internal power outlets and
a sliding ticket window.
All plant controls are mounted on a centralized panel inside the control house.
Controls include three temperature controllers, burner management controller,
and PLC (programmable logic controller) for control of mixing. An emergency
plant shutdown control enables the operator to shut down the entire plant.
Motor controls enable the operator to turn o/on power to motors that operate
the air compressor, exhaust fan, drum drives, drum mixer burner blower,
drag conveyor, slinger conveyor, nes-return auger and fuel pump. ese
controls also provide control of mid-stream start/stop.
Burner controls enable the operator to choose either manual or automatic process
control, preset mix process temperature, preset the mix temperature limit,
preset the stack temperature limit, see burner status, reset the ame safeguard
controller, turn on burner pilot, turn on burner main ame, see status
of limits, see status of ame failure, and to silence the burner alarm.
All of the plant’s motors and switches are pre-wired and factory-tested.
Quick-plug connectors aid in rapid plant setup.
CEI will configure the plant to meet
your individual needs. Larger control houses, Motor
Control Center (MCC) rooms, etc. are available to meet your specic
requirements. In addition to the standard drum burner that is red on
natural gas, optional burners are available that can operate on propane
gas, diesel fuel, or heavy fuel and recycled waste oil (with an optional
heavy fuel preheater). Low NOx burners, asphalt tank vent condensers
and other environmentally pro-active options are also available.
DURABLE.
CEI products are well-made, designed for strength, and constructed of heavy-duty materials. You’ll get all the components you need, without paying
for the u that raises your overhead. And, CEI backs its products with worldwide service and parts support.
PORTABLE.
Nomad asphalt plants are designed for rapid, hassle-free setup and takedown. e control house, drum mix unit, cold-feed bins, baghouse,
surge bin and asphalt tank are trailer-mounted for easy portability. Upon arrival at a new job site, the entire plant can be set up and operational
within a day or two.
RELIABLE.
e plant’s high-quality PLC-based controls provide reliable and fully automated mixing. Additionally,
the plant features fully-redundant manual controls, so the entire plant can be operated
fully manually if needed.
© 2008 CEI Enterprises, Inc. Specifications subject to change without prior notice or obligation.
CEI ENTERPRISES,INC. an Astec Industries Company