Though belt-driven vertical cuttings dryer systems are cost effective and relatively easy to implement, at a minimum they have represented a maintenance nuisance, at worst they represent a Class II – Division 1 safety concern. When the vertical cuttings dryer is operating at peak performance, a confined cloud of dust and oil mist is generated within the body.
More concerning is the growing number of new entrants into the market incorporating poorly designed or completely exposed belt and sheave systems that provide no barrier between the potentially combustible environment and a static-electrical discharge or excessive heat source.
Elgin’s new patent-pending direct drive vertical cuttings dryers incorporate a proprietary assembly that includes an alignment compensating drive shaft, greased-for-life 90 degree torque inverter, and the industry’s most durable and field-proven gear-box drive system. Not only does Elgin’s technology eliminate the need to enter the dryer to service the drive belt system, but it provides guaranteed Class I – Division 1 and Class I – Division 2 drive system compliance. No other dryer available in the market can make those same claims.
Elgin’s Direct Vertical Cuttings Dryer Drive Technology yields a number of unique benefits, including:
• Completely eliminates the use of belts or the need to enter the body of the dryer for maintenance.
• The 90 degree torque inverter gear box reduces the power consumption and power transmission efficiency will increase.
• The direct drive gearbox is 99% efficient whereas V-belt sheaves are only 95% efficient, again improving power transmission.
• There will be no over-hung load on the motor bearings, thus extending the life of the motor.
• By eliminating the sheaves and belts, vibration and noise levels will be significantly reduced.
• By eliminating the large belt tunnel and motor mount assembly, the dryer is 160 pounds lighter.
The installation of grounding brushes and
other static dissipation devices are rare. It
is even more uncommon to have such
devices maintained properly.
Inadvertent damage to the belt tunnel and/or removal of the access doors leaves static-electrical discharge or excessive heat exposed to a potentially combustible atmosphere.
Static electricity is the ignition source in approximately 10% of all chemical fires & explosions. Between 1980 and 2010 there
were 351 dust fires and explosions in US.