Belgian-based Vigan Engineering designs and manufactures port equipment for dry bulk handling and is widely recognized throughout the world as an expert in pneumatic bulk handling technology.
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3. PORTS
Continuous
barge unloading
B
elgian-based Vigan Engineering
designs and manufactures port
equipment for dry bulk handling
and is widely recognized throughout the world as an expert in pneumatic bulk handling technology.
With their numerous advantages compared to grabs or other mechanical devices,
pneumatic barge unloaders have a wellestablished reputation among large-size
agribulk businesses all around the world.
Continuous barge pneumatic unloaders
have particularly proven their suitability for
discharging products such as all types of
cereals and oilseeds, raw materials for animal
feeding, as well as many other free-flowing
products like fertilizers, soda ash, aluminium
oxide (alumina) or emerging new commodities such as wood pellets.
Provimi Dresses in Green
In May 2013, Vigan installed a pneumatic
barge unloader at Provimi (part of the Cargill
Group) in Kaiseraugst, Switzerland. The
machine was painted in green to blend in
with the forest landscape, and the unloader
was mounted on a floating bridge to avoid
damaging the environment.
With an unloading capacity of 300 t/h
(metric tonnes per hour), the pneumatic
unloader is equipped with a four-stage turbo
blower directly driven by a main electrical
motor of 250 kW and controlled by frequency inverter (this speed variator enables
a flexible unloading capacity from 150 t/h to
300 t/h and optimizes power consumption
at all times).
The machine’s central tower includes
a high-pressure jet-pulse type filter (filtering area of 112m2) on a slewing pedestal
mounted on the stationary gantry.
The 15 metre long rotating boom is
completely hot-dip galvanized, with a lighting
36 | September - october 2013
system and floodlight for the illumination of
the barge hold. The vertical and horizontal
telescopic pipes are controlled by remote
control boxes (push button and radio types)
and Vigan provided a special cutting nozzle,
enabling the suction of less free-flowing
material such as soybean meal.
Efficiency: fast and perfect hold
cleaning
When unloading barges and other vessels, speed is a major challenge. It’s also
crucial for hold cleaning. Mechanical grabs,
for instance, offer a high unloading rate at the
beginning of operations.
However, the final cleaning of the hold
at the end of the process requires considerable attention from the crane operator and
the auxiliary workforce in the barge hold, in
order to co-ordinate tasks to achieve maximum efficiency.
With mechanical grabs, the remaining
layers of product in the bottom and along
the barge hold borders need to be gathered around the target area. This is usually
quite time-consuming (a real nightmare
for the manager in charge of productivity
targets) and also rather dangerous for the
workers.
On the other hand, pneumatic unloaders
behave like vacuum cleaners, efficiently sucking the product particles down to the hold
bottom. Thanks to the telescopic characteristics of the pipes and the rotating capability
of the boom supporting the conveying line,
the suction nozzle is also able to reach the
hidden corners of the hold.
Most recent attempts with other
mechanical continuous unloading systems
have failed, or have performed poorly when
attempting to provide an efficient final cleaning of the barge hold.
A single worker can manage the whole
barge unloading process, including when
behaving as the driver of the auxiliary
‘skid steer’ equipment and for final brushing of the products around the suction
nozzle.
For barges, it is quite common to achieve
an average efficiency rate of up to 80
percent with a Vigan pneumatic unloader
in comparison to only 60–65 percent with
conventional grabs.
Environmentally friendly
In terms of environmental friendliness,
the Provimi unloader’s green paint is just
the beginning. The machinery room is
noise-insulated with a turbo blower group
and high-performance silencers. Negative
pressure is maintained around the suction
nozzle, whose filtering system ensures
less than 10 µg of dust escapes per cubic
metre.
The lack of a grab crane means that the
boom can move at relatively slow speeds,
reducing any disturbance to nearby wild
animals. Finally, the use of pneumatic equipment eliminates the risk of spillage from
potential contaminants like nitrates.
Low power consumption
Most recent technological developments
such as the installation of frequency inverters, direct drive of the turbo blowers, optimized design of the suction nozzle, and the
general philosophy of pneumatic conveying
systems enable low power consumption.
For barge unloading, power consumption is
around 0.6–0.7 kWh/t.
Advantages of barge unloaders
Efficient barge unloading is indeed a challenge, but it is a must in most modern industries. Further to these advantages, pneumatic
continuous unloaders allow easy, low-cost
maintenance and have an almost nonexistent
accident risk.
&feed millinG technoloGy
Grain
4. Automotive
Industry
Building &
Construction
Industry
Chemical
Industry
Cre
Ind
The right storage solution starts with the right advice.
Storage decisions can affect your operation for decades. That’s why so many companies around the world trust Westeel with their storage
needs. Not only do we supply some of the most advanced storage products available, we support our products with the expert project leadership
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MF22565-0313
westeel.com | Canada (Home Office) +1-204-233-7133 | United States +1-701-280-2467 | Spain +34 91 216 14 97
22565 Westeel Global Campaign 2013 GFMT March.indd 1
2013-03-25 3:02 PM
Westeel: Global Campaign 2013
Grain & Feed Milling Technology: 190 mm x 132 mm, CMYK, March-December 2013
Publication
ite
we b s
ou r
Vi sit vigan.com
www.
VIGAN manufactures dry agribulk materials handling systems:
Latest references
• Portable pneumatic conveyors or grain pumps (100 - 250 tph);
• Pneumatic Continuous barge & Ship Unloaders (160 - 800 tph);
• Mechanical Continuous Ship Unloaders (up to 1,500 tph);
• Mechanical loaders (up to 1,200 tph).
as well as complete storage systems in ports and the agricultural industries.
PYEONGTAEK PORT
From project design to complete turnkey bulk handling solutions
and port terminals with mechanical and/or pneumatic
reliable and cost effective equipment.
South Korea
1 NIV 400 tph
On rails with cable reels
LATTAKIA PORT
Syria
2 Mobile T200
2 x 250 tph
SWINOUJSCIE
Poland (BUNGE GROUP)
1 Loader 600 tph
An affiliate company of VAN DE WIELE group.
VIGAN Engineering s.a. • Rue de l’Industrie, 16 • B-1400 Nivelles (Belgium)
Phone : +32 67 89 50 41 • Fax : +32 67 89 50 60 • Web : www.vigan.com • E-mail : info@vigan.com
&
Ann A5 victam 0212.indd 1
Grain feed millinG technoloGy
21/02/12 37
September - october 2013 | 15:37:04
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6. LINKS
September - October 2013
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•
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In this issue:
•
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Sieving
technology in
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production
•
Mixed integer
optimization:
Traceability
a new risk in maize
production?
• See the full issue
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a new step in
formulation software
•
Weighbridges
the workhorses of
industrial weighing
•
High-precision
sensors:
the ideal solution
for measuring grain
humidity
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