technology | Machinery DRYERS
Moretto to showcase advanced drying for engineering thermoplastics
Moretto will showcase its enhanced Eureka drying system at the forthcoming Fakuma exhibition in Germany. The system comprises a
Flowmatik airflow manage- ment and distribution system, OTX hopper dryer and the X Max dryer. Moretto says Eureka is
“the most advanced drying system for engineering thermoplastics” and the only drying system that can process 10,000-12,000kg/h of material in compounding, extrusion and PET process- ing. Here, the company claims, it has around half the
energy consumption of traditional drying systems. The core X Max dryer is based on Moretto’s patented ‘X technology’ and incorporates a multibed single molecular sieve desiccant system providing constant -65°C to -85°C dew point. Though twice
the size of conventional beds, it works without needing cooling water or compressed air for the changeover valve, and also recovers energy by cooling of the bed during molecular sieve regeneration. A key enhancement in the latest X Max dryer within the
Eureka system is its multi-stage centrifugal blower, developed by Moretto in cooperation with nearby Padua University. Due to these combined
features, the X Max drier is highly efficient: the X Max 916 model provides each unit with up to 1,600m³/h drying capacity at 300 mbar pressure with an electricity consumption of 13.2kWh. Between two and 10 X Max
dryers can be combined, providing large drying capacity, with up to 20,000m3
using 10 units. ❙
www.moretto.com
/h airflow rate when
DRYERS Desiccant dryers offer compressed air alternative
Conair says that its Micro- Wheel dryers offer an alternative to compressed-air dryers and small twin-tower
units, making them ideal for medical processors and others running small quantities of expensive engineering resins. They deliver the efficiency
and precision of desiccant- wheel drying in a compact configuration that can be mounted on the feed throat of an extruder, says the company “When it was
introduced nearly 10 years ago, the Carousel Plus
wheel dryer was
revolutionary,” said Jamie Jamison, drying product manager. “But even the smallest units were too big for
46 PIPE & PROFILE EXTRUSION | October 2014
machine mounting and had fairly large throughput minimums, so processors had no alternative but to use other, less efficient drying technolo- gies.”
The MicroWheel is offered
in two basic models: the MW1 and the MW2. Because they use brushless blowers with speed control built in, the dryer can be programmed to deliver the right amount of process air flow to dry different resin volumes. Each model is available with several different hopper capacities: the MW1 can support hoppers of 5.7, 14.2 and 28.5 litre capacity. Including the hopper, they range in height from only
19.5in (495mm) to 27.7in (704mm). The largest weighs 106lbs (48kg). The larger MW2 dryer is
available with 28.5 and 42.5 litre hoppers. Units are 27.7in (704mm) and 38.5in (978mm) high. The weight of the largest unit is 144lbs (65kg). Other standard control
features include: a material protection management sytem, which automatically reduces process air tempera- tures when return-air temperatures exceed setpoint; and real-time energy consumption monitoring, which tracks the dryer’s power consumption. ❙
www.conairgroup.com
www.pipeandprofile.com
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