Ports, Terminals & Transport
safety: no running mechanical parts are in contact with the air flow which could be eventually contaminated with dust and therefore could be the origin of explosion.
• Major reliability and safety of this equipment are also due to special alloys against wear used for instance in the elbow between the vertical and horizontal suction pipes, in the airlock components and generally speaking by integrating most compulsive rules concerning latest European norms about engineering design, equipment manufacture and human resource protection.
Pneumatic unloaders ensure minimal breakage of wood pellets
First pneumatic unloaders were manufactured already at the end of the 19th century but continuous technological improvements were introduced for a higher reliability, a better safety and optimum running costs.
Vigan NIV 600 pneumatic ship unloader For achieving those objectives, Vigan NIV 600 model in Gelderland is having the latest technologies available such as the following as a few examples: • Three turbo blowers groups (each four stages) with direct drive and controlled by latest speed variators ( frequency inverters) by Schneider Electric. The direct drive is a major improvement because it reduces not only the numbers of bearings which are existing on traditional drive with belts but also the mechanical efforts on the turbine shaft The multi-stage turbo blowers are maximizing the suction capabilities for a larger range of product characteristics to be handled with no need of any special feeding device and in combination with the speed control system, it make feasible to precisely optimize the energy consumption. Some Vigan customers reported figures as low as 0.6 to 0.7 kWh/ton thanks to those technology developments and also chosen by Electrabel.
As also observed in this project, those 3 turbo blower groups are giving to the customer a convenient extra capacity of suction power reserve to face any unexpected event and to guarantee his daily unloading target. • Air jet pulse system for automatic cleaning of the filter.
Widely recognised among the food and feed industry sectors for the global best performances and reliability, this system offers also a major advantage about
www.solidsandbulk.co.uk
The use of alternative sources of energy such as biomass will certainly increase during the coming years and all the logistic aspects of these inputs require very careful approach. Electrabel receives full credit for this landmark project in green electricity production. It also receives the credit for having understood the benefits of the pneumatic technology for a reliable and efficient unloader. For more information contact Vigan Engineering by email:
info@vigan.com or visit:
www.vigan.com
Keep Your
Bulk Materials Flowing in Hoppers, Chutes, & Silos with MARTIN®
Air Cannons
Call: +44 (0) 115 946 47 46 Email:
info@martin-eng.co.uk | Visit:
martin-eng.co.uk
® Registered trademark of Martin Engineering Company in the US and other select locations. © 2010 Martin Engineering Company. Additional information can be obtained at
www.martin-eng.com/trademarks.
November 2010 • Solids & Bulk Handling 15
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