Hosokawa Unveil Flashy New Dryer

The Drymeister continuous flash dryer offers drying, grinding, classifying and sterilising in one process. Developed from the established Micron dryer range, available from Hosokawa Micron Ltd., the Drymeister offers significant increases in drying efficiency and cost effective energy savings over other Micron dryer technology as well as single step production of powders.

Ideal for use on a diverse range of products including pigments, minerals, agro chemicals, food additives, wheat flour and cellulose, the Drymeister can handle solutions, slurries, pastes and even very sticky materials, achieving adhesion free drying.

The Drymeister operates by atomising the wet particles in a hot gas stream and if this gas is superheated steam then it acts as a highly effective steriliser. There is no need for an inert gas such as nitrogen as the steam is oxygen free acting as an inert gas, which is ideal for products susceptible to oxidation or flavour loss. Explosion protection is also addressed when using superheated steam.

Energy Savings
As steam has 1.8 times more heat capacity than air a smaller amount of carrier gas is required and the size of auxiliary equipment can be reduced. No condenser is required to recover the evaporated liquid and the steam vented from the process can be used as a heat source for other processes. Compared to using nitrogen the Drymeister with steam creates only one quarter of the total annual utility costs.

Versatile System
As with the original design of Micron Dryer the Drymeister is able to grind and classify products using a variable speed grinding rotor in the base of the dryer body and a classifier rotor at the top of the unit. The unit is 50% more compact than the original Micron Dryer and it is a highly efficient flash dryer capable of evaporative loads up to 5-6 tonnes per hour on slurries or liquids.

Pilot plant trials with whole black pepper grains showed that steam completely sterilised the product making it ready for human consumption, whilst air drying produced only partial sterilisation, with the product needing further treatment.
Similar pilot plant studies have been carried out on the drying and classifying of organic pigments and drying of sticky, wet sulphur, with good results achieved in both cases.

Drymeister units are available in 7 sizes from evaporative loads of 200 to 6220 kgs per hour and full test facilities are available.

For further information:
Hosokawa Micron Ltd
Rivington Road
Whitehouse Industrial Estate
Runcorn
Cheshire
WA7 3DS.
Tel: (01928) 755100
Fax: (01928) 714325

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