DRYING: New Tower Design Increases Dryer Efficiency

Novel parabolic tower design, unique heater configuration, and optimized airflow are said to maximize efficiency.

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New Ɛ-Plus Series Dryers from Dri-Air Industries, E. Windsor, Conn., are said to offer faster, more complete drying with unmatched energy efficiency. Their novel parabolic tower design, unique heater configuration, and optimized airflow are said to maximize moisture pickup for ultra-low dewpoints, faster drying, and dramatically reduced regeneration energy usage. Increased hopper insulation further improves the energy efficiency with even the most challenging, hard-to-dry plastics. To be shown next month at NPE2015 in Orlando, Ɛ-Plus Dryers are offered in three sizes with drying capacities of 25, 50, or 100 lb/hr.

Large touchscreen controls are designed for easy viewing from a distance. A simple master screen shows all key operating information at a glance. Additional screens simplify setting and monitoring of 7-day timer, temperature setback, and loader control functions. A new Dri-Link app allows dryer monitoring and control from a smart phone, tablet, or other portable device. Dryer information can also be transferred to centralized systems for real-time monitoring or control.

Ɛ-Plus dryers are fully enclosed for greater energy efficiency. This enhances the temperature profile within the hopper and simplifies dryer cleaning in cleanroom environments. An optional hopper management system constantly measures (by means of a laser) material levels and displays the information on the main control screen, allowing the screen’s use as an adjustable fill control and low-material alarm.  In addition, setting drying temperature by selecting the type of material allows the control to calculate and display hopper contents in pounds or kilos.

Ɛ-Plus Dryers are designed for fast, easy changeovers and maintenance. The dryer has only one moving part, which rotates every 2-3 hr. All components are easily accessible. A closed-loop loader gate keeps dried material in the drying hopper and cleanout line every cycle. A spring-loaded slide gate closes the outlet of the hopper automatically and is fitted with a handle to allow access for hopper cleaning. Control service screens show internal temperatures and other parameters, reducing maintenance times. Graphic screens show the location of failed components, as well as part numbers of all major components for streamlined ordering.