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HYVENT DUST FILTRATION TECHNOLOGY

Dust filters play a vital role in venting powder silos during filling and operational processes.
However poor maintenance and inadequately specified filters can be a road to disaster.

Hycontrol's Hyvent dust collector and filter unit is specifically designed to vent silos during the filling process without allowing valuable powdered product to escape. Product is filtered from the air during both the conveying period and the air surge at the end of the cycle. The filter is self-maintaining, returning product back into the silo via an automatic reverse-jet pulse cleaning system which utilises compressed air.

This filter unit utilises the latest technology in the form of conical-shaped filter design. This provides outstanding cleaning efficiency while enabling maximum airflow through the unit, with the added benefit of increasing the operational lifespan of the cartridges. The filter unit itself has a rugged weatherproof construction and is built for safe and simple maintenance.

Hyvent has been designed according to the latest guidance from the Mineral Products Association (MPA), and to meet HSE guidelines on the prevention of storage silo over–pressurisation during deliveries. It complies fully with current environmental emission standards and is capable of filtering all types of powders. Hyvent forms an integral component of Hycontrol’s award-winning, advanced SHIELD silo protection system, providing the ultimate defence against the dangers of overfilling and over-pressurisation in powder silos.

CONICAL FILTER ADVANTAGES

The conical cartridges utilised in the Hyvent unit offer many advantages over traditional cylindrical cartridge or bag filters due to their compact design, higher filtration efficiency and superior pre-separation of dusts. The tapered shape allows increasing separation from top to bottom between the filter elements inside the unit resulting in reduced up-stream air velocities, increased pre-separation and lower dust re-entrainment.

The inner core of the filter elements are also tapered, enhancing the effectiveness of the compressed air jet and giving a more even clean over the length of the cartridge.

BENEFITS & FEATURES
Low-maintenance reverse jet cleaning
Conical cartridge technology for greater efficiency
Latest spun-bonded polyester filtration media
Reduced dust entrainment with better cleaning separation
Safe, hinged weatherproof cover with lockable snap hook
Robust, corrosion-resistant construction
Simple, fast replacement of filter cartridges
No scaffolding required for cartridge removal
21m² or 24½m² (226 ft² / 263 ft²) filter surface area
Durable 304 Stainless Steel body
Small silo-top footprint for space-restricted installations
High filtration efficiency - better than 5mg/m³
 

As shown in the illustrations below, the unique Hyvent design means that 82% of the area at the inlet chamber of the filter unit is free as opposed to typically 59% when using cylindrical elements. This results in lower upward air velocities at this point, increasing dust separation. These features mean the filters have a longer functional life and offer a higher consistency of performance.

STANDARD DUST FILTER DESIGN

Traditional cartridge filters suffer from reduced air flow towards the bottom as pressure is lost. There is also the serious issue of dust re-entrainment between neighbouring filters.


HYVENT CONICAL DUST FILTER DESIGN

The conical shape of the Hyvent filter means pressure is more evenly distributed down the cartridge, maximising product removal. It has the additional advantage of increasing free air space for dust to fall away, significantly reducing re-entrainment.

This animated GIF illustrates how the Hyvent self-cleaning mechanism works:
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HYCONTROL LTD Larchwood House, Orchard St, Redditch B98 7DP UK. Tel: +44 (0)1527 406800 Email: sales@hycontrol.com