Description
Single pass dryer, also known as rotary drum dryer, are in wide use
and have a long proven history in many industries and is widely
used drying machine of many industries such as engineered wood and
composite panel industry, biomass, sludge, mineral, building
materials, metallurgy, chemicals, slag, cement, limestone, coal,
clay and other materials. The simple construction combines
flexibility with reliability, enabling the dryer to handle a vast
range of materials and to operate continuously under the most
arduous conditions.
In single pass dryer, wet materials is mixed directly with hot air
inside the rotating insulated drum. The wet materials and hot air
normally flow concurrently through the dryer so the hottest gases
come in contact with the wettest material. The exhaust gases
leaving the dryer may pass through a cyclone, multi-cyclone,
bughouse filter, scrubber, ESP or WESP to remove any fine material
entrained in the air. An ID fan is usually placed after the
emissions control equipment to reduce erosion of the fan, but may
also be placed before the first cyclone to provide the pressure
drop through downstream equipment.
