Steel Belt Dryers & Roasters
Dryers
Dryers (or driers) are used to extract moisture from materials, whether textiles, food or slurries. Dry roasting applies heat without using oil or water, stirring the materials to ensure even heating. This is typically carried out on nuts and seeds, coffee beans, spices, cocoa beans and tea leaves. Dry roasting changes the chemistry of proteins in food resulting in an enhanced flavor and scent. This can be done in a specialised roaster, especially in industrial settings, or at home in a frying pan or wok.
One common example of a drier is a clothes drier. The first version of the tumble dryer was created by Pochon in 1799, consisting of a metal drum with holes in it hand-cranked over a fire. An improved and patented version was designed by George T. Simpson in 1892, but the fist electric clothes driers were designed around 1915. The basic concept involves drawing in dry air, heating it, passing it through the tumbler, then venting the hot and humid air outside. It consists of a lint screen through which the air is drawn through, a fan, rotating tumbler that holds the clothes, a heater, an exhaust vent, temperature shut-off switches and controls.
Steel Belt Dryers
Process Systems Services Pty Ltd provides steel belt dryers for a range of products, including sugar, sodium cyanide or even slurries containing gold, uranium or tin. They also design dry roasting tunnel ovens for all sorts of nuts. They use steel belts for easy cleaning to meet the stringent hygiene requirements of the food industry. They can also be designed to include feed devices or flavour adding systems. Process Systems Services also produces Steel Belt Bake Ovens, primarily for biscuits and cookies, though they can also be used for pastries, pet food and pies. It is an Australian owned company specialising in steel belt technology, offering a range of products and a high level of service.