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October 1, 2006




Process small batches with this fluid-bed dryer

The Circular Vibratory Fluid Bed Processing System (photo) dries small batches of bulk-solid materials at high temperatures. The self-contained system integrates an 18-in.-dia. fluid-bed processor with heater, blower, cyclone separator and controls, ready for connection to a material inlet/outlet and power source. Intended for small volume production and laboratory/pilot-plant testing, the system dries batches up to 1 ft3. At the end of each drying cycle, a valve at the spout of the fluid-bed chamber opens automatically to evacuate the batch. The system includes an optional high-temperature package that allows drying at temperatures up to 600°F. Fines entrained in the exhaust air are collected by an optional cyclone separator and returned to the stream of dried material at a "Y" fitting. - Kason Corp., Millburn, N.J.


Membrane dryers provide dry compressed air

The Smart Dryer membrane air dryers (photo) are for applications requiring dewpoints of 35°F and flowrates of up to 1,200 scfm. Compressed-air contaminants down to 0.01 mm are also removed. The system monitors air consumption and automatically adjusts the regenerative sweep flow as required, without the need for electricity. The Smart Dryer 5000 Series Air Dryers are shipped complete with prefilters, auto drains and membrane modules all assembled in a cabinet wit inlet and outlet ports mounted on top for easy installation. - Parker Hannifin Corp., Filtration and Separation Div., Haverhill, Mass.


This system delivers uniformly dried product

The model H-10 Turbo-Dryer is designed for easy cleaning between products, and is used to dry water-wet material or solvent-wet material without the need for vacuum. Test results from this unit are directly scaleable to larger capacities. The Turbo-Dryer consists of a stack of slowly rotating circular trays. Material is fed onto the top tray and after one revolution, it is wiped onto the next lower tray, where the operation is repeated. The trays are contained in an enclosure, where heated air or gas is circulated by internal fans. The benefits of this dryer include gentle handling for fragile materials, automatic operation, product uniformity and low power and heat requirements. - Wyssmont Co., Fort Lee, N.J.


This dryer can be used for more than just drying

Conventional conical dryers, consisting of a conical vessel with a dished head and an agitator screw turning on a revolving arm, are well known. The HVW dryer of this manufacturer is different. A double helix turns on a central shaft. The range of applications for this dryer are extensive, and include powder drying, coating, reactions and evaporation. For difficult to dry or temperature-sensitive products, drying time can be substantially reduced by a combination of contact and convective drying towards the end of the drying process. To accomplish this, a carrier gas is added in the lower part of the cone. The high product turnover in the vessel makes the dryer also suitable for spray coating of suitable carrier powders. The process limits of a standard HVW for temperature are –20 to 350°C and for pressure are –1 to 10 bar. In extreme cases, the unit can be designed for temperatures up to 500°C. This conical unit can be used as a reactor that provides fast heat transfer and intensive mixing. The conical shape of the vessel promotes an easy discharge of viscous products and for difficult processes, the product can be actively discharged by reversing the agitator rotation. - AVA Americas, LLC, Matthews, N.C.


New cylindrical vacuum dryers are introduced

These new dryers feature internal agitation that consists of an improved paddle design, set at opposing angles to insure that the materials being dried are continuously exposed to the jacketed surface area of the trough and endplates. Designs are available from 1 through over 500 ft3 and can include the following features: a variety of materials of construction such as Hastelloy and stainless steel, full vacuum and internal pressure operation, dimpled and baffled jackets on trough sides and endplates to 200 psig, polished surfaces, special discharge valves such as flush plug, spherical, or slide gate. Other options include choppers for size reduction, spray nozzles, variable-speed drives and control systems. - Charles Ross and Son Co., Hauppauge, N.Y.


This centrifuge-dryer combines two process steps

The new TZT combination centrifuge-dryer (photo) combines filtration/separation and drying within a single machine. This system offers the washing efficiency of a filtering centrifuge with forced-convection and fluidized-bed drying. The TZT is ideal for highly active compounds or hazardous materials where traditional two-stage filtration and drying equipment processing could result in containment difficulties during the transfer of materials from one machine to another. Other key benefits of the system include, reduced N2 consumption to achieve the quickest drying and total cycle times, fully contained online product sampling, clean-in-place (CIP) and steam sterilizable. - Heinkel USA, Swedesboro, N.J.


This laboratory fluid-bed dryer offers efficiency

In the Rapid Dryer TG 100, a constant flow of warm air keeps the particles to be dried agitated and separate. The result is a rapid, gentle and uniform drying process without localized overheating or agglomeration and a loose, thoroughly mixed product. Processing times in the TG 100 range from 5 to 20 min, depending on the sample characteristics, quantity and moisture content. This dryer features temperature and airflow controls, as well as a timer. The TG 100 can be adapted to various applications with drying containers from 0.3 to 6 L and a choice of exhaust air-filtering systems. Typical samples include pharmaceuticals, coal, fertilizers, plants, plastics, soils and waste. The Rapid Dryer can also be used for the quick drying of test sieves or other laboratory items. - Retsch, Inc., Newtown, Pa.


These desiccants are offered in various container sizes

A full line of molecular sieve desiccants is offered in bulk for industrial desiccant dryers used in drying chemicals, plastics, fuels, and gases. These sieves feature a high surface area with high porosity to optimize adsorption. Capable of purifying and drying in one operation, this molecular-sieve desiccant has uniform bead sizes to prevent adsorbent segregation and is offered in cans, drums and supersacks. This company also offers activated alumina and silica gels. - Sphinx Adsorbents, Inc., Springfield, Mass.

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