slowly rotating hollow steel drums are heated internally by pressurized steam to 120-170
a thin layer of food is spread uniformly over the outer surface by dipping,spraying or spreading
before the drum has completed one revolution,the dried food is scraped off by a doctor blade which contacts the drum surface uniformly along its length
high drying rates and high energy efficiencies
used to produce potato flakes, pre-cooked cereals, molasses, dried soups and fruit purees