Rotary drum dryers are the workhorse of the drying industry because of their capacity, efficiency and ability to adapt to new purposes. This article will discuss what a rotary drum dryer is, what applications a rotary drum dryer is best suited for, and common concerns and solutions regarding rotary drum dryers.
Rotary drum dryers can be chosen for projects as large as evaporating half a million tons of water to as small as evaporating several tons of water. They come in all sizes to accommodate many products, quantities and moisture-content ranges. Although they can be larger, 18-foot-diameter drums seem to be the largest practical size for manufacturing, transport and installation purposes. Depending on length, an 18-foot drum could evaporate 120,000 pounds per hour of water. If, for example, the product to be dried starts at 50 percent moisture-content wet basis (mcwb), this drum could handle 120 tons per hour or more. At 8,400 operating hours per year, you’re looking at a million tons of product infeed going through every year, or about half a million tons per year of final product.