DCT put a ring around dust emissions
Dust Control Technology introduce DustBoss dust-suppression ring for conveyor discharge points
AN innovative new dust-suppression device has been introduced specifically for use at conveyor discharge points, designed to create a virtual curtain around the material flow for effective particle containment.
The DustBoss DB-R from Illinois-based Dust Control Technology (DCT) comprises a robust, high-quality stainless steel ring fitted with a network of atomizing nozzles that deliver millions of 50–200 micron droplets per minute. By surrounding the material discharge flow on all sides, the DB-R provides simple, focused dust management that is well suited to continuous duty, such as radial stackers.
‘This design was first developed for a coal application,’ explained Dust Control Technology’s chief executive officer, Edwin Peterson. ‘The momentum created while discharging dry coal was propelling large amounts of dust into the air, and the customer was looking for a way to specifically address the material as it came off the conveyor.
‘The solution was simple but effective, and we are finding that it is also well suited to conveyor discharge of sand, aggregates, biomass or other traditionally dusty materials,’ he said.
The DustBoss DB-R is available in five standard sizes, from 17in (43.2cm) to 100in (254cm) in diameter. All five can be customized with DCT’s variable particle sizing technology, allowing customers to specify different water droplet size ranges to match specific materials.
‘The greatest chance of a collision between a dust particle and a water droplet is present when the droplet and dust are roughly the same size, avoiding the slipstream effect,’ explained Mr Peterson. ‘If we can increase the chances of collision with a given particle size, we improve the effectiveness of the suppression.’
Designed without any moving parts, the intrinsically safe DB-R is intended for elevated mounting and requires no electrical power or compressed air. The water supply hose is connected directly to male pipe threads on the ring: 3/4in NPT for the 17in model, and 1in NPT for the three intermediate sizes: 22.5in (57.2cm), 25.5in (64.8cm) and 42in (106.7cm). For large applications, the company also offers a 100in diameter model, which is supplied by a 1.5in NPT hose.
Available options for the DB-R include: a booster pump, to elevate low water pressures; a variety of nozzle sizes and configurations; and a water filter. Customers can also order the units with a two-way valve and/or hose included.
The number and size of the spray nozzles vary by model. The smallest model features 30 brass nozzles that produce 3.25 gal/min (12.3 litres/min) of water flow. The 22.5in unit is designed with 18 medium-flow nozzles, with a water usage of 11.3 gal/min (42.9 litres/min). The 25.5in and 42in models feature 30 high-flow nozzles that deliver 18.9 gal/min (71.5 litres/min), and the 100in size employs 84 nozzles for 52.9 gal/min (200.3 litres/min) of water delivery.
