Dust control for free-flowing materials

 

T H White Projects have recently released a vital addition for ports, grain processing or mineral and chemical industries. The patented dust suppression hopper performs brilliantly in environments where dust control is an important part of materials handling.

Dust control has always been a major challenge in the commercial handling of powdery, granular or other free- flowing materials. Depending on the material being handled, dust may not just be unpleasant and unsightly, it can cause health issues, environmental hazards and even the dangerous risk of explosions.

Many processing, storage and handling plants may think they have little choice other than to try and cope with a dust-polluted atmosphere, but this dust suppression hopper solution, distributed throughout England and Wales by T H White Projects, virtually eliminates dust during transfer processes.

The dust suppression hopper, manufactured in New Zealand by DSH Systems Ltd, is an easily-installed loading spout, designed to be mounted immediately beneath an existing feed point. It's ideal for use where free-flowing products need to be packed, bagged, or loaded into ships, railway wagons, trucks, silos or storage bins.

Simple in design, yet highly effective, the dust suppression hopper funnels material through a restricted orifice and cone, causing it to adopt a swirl. As the material exits the nozzle a combination of surface tension, compression and the induced vortex holds it together in a tight, highly controlled stream which contains any dust within the column.

The standard version has no internal moving parts and requires no power, it is simply configured before use, according to the type of material being dealt with. Where several different types of material may need to be out-loaded from the same conveying system there is an advanced model featuring a computerised positional feed control.

The two models available can be purchased in a range of 10 sizes and can be made from standard polyethylene, or tougher materials, including steel (mild steel, electro-galvanised, Corten or Hardox), where aggressive or abrasive materials are being handled. 304- grade stainless steel can also be specified for the handling of warm or abrasive materials, and 316-grade stainless steel for food grade handling and corrosive materials.

The design of the dust suppression hopper, inspired by the need for safer handling of fertilisers, has proved to be equally effective when handling most other free-flowing granular materials. Goods which are already being widely handled with success include cereals, sugar, salt, pet foods, sand, gravel, limes, minerals, pellets and chemical powders.

Applications for the dust suppression hopper are wide and hugely varied. Across the grain processing industry its benefits can be applied at grain storage and handling installations including co-operatives, milling plants, maltings, breweries and distillers.

Mineral and chemical plants including mines, quarries and glass works can benefit from far tighter control of potentially hazardous materials. And at ports, where it's important to control dust drift, while loading ships or transferring goods between ships and rail, road or storage facilities, the benefits are equally rewarding.

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