Central Drying/Conveying Systems

Central Drying/Conveying Systems
Central Drying/Conveying Systems
Central Dryer Series : 200-5000 lb./hr. (90-2272 kg/hr)
Central Drying/Conveying Systems
reduce operating costs, increase
production, improve product quality
and produce excellent payback.
You Are A Good Candidate for
Central Drying/Conveying If…
— You have dryers on 10 or more machines
— You have a single material that requires drying
and it is required at multiple machines
— You have frequent material changes on
your machines
— You use more material types than you
have machines
— You have dryer to dryer quality issues when
drying the same material
7” High Resolution Color Touch Screen Standard.
—You want to expand, but do not have
sufficient space
A Central Drying/Conveying System helps processors overcome serious
issues, often saving hundreds of thousands of dollars per year
OverDry Protection Standard
Eliminates over-drying of moisture-sensitive resins, like nylons.
Faster Changeover Times
Increases machine uptime and
production.
Minimizes Labor and
Floor Space
Removes press-side dryers,
hoppers, gaylords and forklifts
from the production floor.
Easy Access Maintenance
All maintenance can be performed
from front of dryer.
Clear Text Messages
No confusing codes that have
to be looked up.
Intelligent Regeneration
Constantly monitors regen inlet
and outlet temperatures and
controls them to optimize energy
and dew point performance.
Veriable Frequency Drive
Dryers from -1600 through -5000
employ a variable frequency drive
that automatically optimizes the
regen blower speed.
Proven Fast Payback of
Investment
A plant survey can compare your
current costs to estimated costs
with a Central System and prove
the payback you can expect.
Standards that Others
Call Options!
- Data trending of processes
- 7-Day Timer with Auto
START/STOP
- After-cooler w/ plasticizer drain
- Dew point analyzer
- High heat capability
- Phase detection on all
portable dryers
- Reliable chain drive
- Filter maintenance alarm
- Alarm light
- Disconnect switch
An Integrated Central Conveying System Helps Improve Product Quality & Increases Machine Up-Time
The annual payback can range up to $400,000 or more per year
Press Side vs. Central Drying
Processor problems with press side drying
• Approximately 75 sq. ft. per station is wasted with dryer, hopper and gaylord.
• Energy lost with dryer and loader at every station.
• Process variations occur with different dryers reducing quality.
• Extra labor and equipment to keep machines supplied with material.
• Every material changeover can cost 2 or more hours of lost production.
• Inevitable loss of material when changing gaylords or materials.
A Central Drying/Conveying System provides solutions
• Optimum drying of multiple materials using a central source for dry air.
• Process stability with central dryer and proper air flow/temperature at each hopper.
• Increases floor space for more machines and greater production.
• Reduced energy costs and possibility of energy rebates.
• Reduced labor and maintenance.
• Fast material changeover greatly increases process machine uptime.
• Material selection with automatic identification reduces material waste and rejects.
Typical process audit results show huge Payback for
Central Drying/Conveying
Based on 12 machines – Average material rate = 200 pph - Drying Nylon/ABS/PC
When we do an energy audit, we find that press side dryers are typically rated for double the throughput for which
they are actually being used. That means that processors are using the energy to dry 400 lb./hr. but are only drying
200 lb./hr.
Press-Side Cost Central Dry/Convey Cost
(per year)
(per year)
EXAMPLE:
Energy Costs: $.10/kwh x 11 kw x 8000 hr./yr. x 12 (400pph) dryers = $108,000
$41,000
Material Changes: Press-side dryers require 30 minutes to 4 or 5 hours
for material changeover.
Based on 2 hour average x 3 changes/machine/week x $50/hr. =
$180,000$22,500
Labor: Central Conveying typically eliminates at least one material
handler/12 machines =
$ 30,000 $0­
$318,000$63,500
Central Drying/Conveying System Payback = $254,500/yr.!
Quick material change greatly increases process machine uptime.
Include Auto ID with Material Selection and reduce spillage and
misdirected materials for even greater payback.
How Central Drying Works
Closed Loop Conveying System Air Illustration
• The central dryer is your single source for
-40° dew point air.
• A heater/blower at each hopper provides
proper air flow and drying temperature.
• Dry air conveying or dry air purging of lines
is available.
QSM
Dry Air Passes through Vacuum
Purge Valve & Coneys Material
(Material Selection Station)
CLR
(Closed Loop Relief Valve)
• Integrated central conveying system with
auto ID of materials minimizes waste.
• Change materials in minutes … not hours
for increased production time.
Closed Loop Air From
Vacuum Pump Exhaust
DSV
(Discharge Selection Valve)
Multiple Materials Central Drying with Closed
Loop Dry Air Convey
Material
Lines
from
Sources
Central Dryer
Provides
Dry Air
180°
170°
Purge Valves
160°
155°
240°
230°
Material Lines
to Distribution
Manifold
150°
Hopper Outlet Temperature
starts at 180° and
steps down to 150°F
250°
Heater/Blower
at each Hopper
225°
220°
Hopper Inlet Temperature
starts at 250°F and steps down to
220°F drying temperature
OverDry Protection
Monitors hopper outlet temperature and
adjusts hopper inlet temperature when
hopper is not utilized at full throughput
capacity to avoid over-drying of resin
Central Drying Assemblies
(Material-specific drying hoppers)
See CDA2 data
sheet for
complete CDA
specifications
The NovaWheel™ Central Dryer provides -40° dew
point air to multiple CDA2 units to custom dry several
resins in vary­ing quantities. Each CDA2 includes a
stand-mounted insulated hopper equipped with an
adjustable heater (up to 350°F) and blower unit
correctly sized for the hopper.
Modular design enables easy installation.
MoistureManager™ Option for CDA2
Dew Point
The source of drying air is
changed from the Central Dryer
to the return air outlet with the
blowers at each hopper
-10 to 0°F
Dew Point
You have the
option of using
either return air
or process air
-40°F Dew Point
Dew Point
Closed loop manifold provides -40° dew point dry air to
hoppers and returns moisture laden air to central dryer.
MoistureManager Option is often used in conjunction
with OverDry Protection to maximize drying control.
Choices for Central Drying Control
1- Program drying parameters at
each central drying hopper control.
2- Add optional control module to 1 central dryer and control up to 16
central drying hoppers from central dryer.
(Number of dryers and hoppers optional)
3- Complete access/control of central drying and conveying - See FlexXpand with NovaNet Data Sheet
FlexXpand™ Control with NovaNet™ Communications
Provides central access to all components of a NOVATEC central drying,
conveying system.
Control of up to 4 Central Dryers, 48 drying hoppers and
160 Material Receivers on drying hoppers, blenders and
process machines.
Control up 20 Vacuum Pumps
Auto ID proofing for up to 73 material sources
Central drying with central blending and conveying
Access up to 2 Railcar
Unloading Systems
Access up to 12 Silos with ID Proofing
FlexXpand™ NovaNet™ Touch Screen PLC’s
Provide Full Central/Remote Control and Access
These touch screen controls allow you to program and monitor
all material loading and can be accessed via web browser by any
networked computer, or via VCN App by a networked Smartphone
or Tablet.
See data sheets on controls and material selection for complete specifications.
© 2016 NOVATEC, Inc.
All rights reserved All information in this
bulletin is subject to change without notice.
222 East Thomas Avenue Baltimore, MD 21225 USA 410-789-4811 | Fax: 410-789-4638
1-800-BESTDRY (800-237-8379) | [email protected] | www.novatec.com
Form # CD 23 MAR 2016
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