The Indirect Heat Rotary Dryer provides high temperature radiant heat from the cylinder wall. Hot gas circulating between the exterior of the dryer shell and interior of the stationary firebox transfers heat through radiation and conduction to dry and process materials. Special flighting, designed for each application, moves material through the dryer while holding it against the shell, ensuring maximum exposure to radiant heat.
The Indirect Heat Dryer is the best choice for applications in which high temperatures and indirect heating are required. It is used consistently for drying materials that cannot be exposed to products of combustion and for drying materials that consist of fine particulate easily conveyed in a high velocity hot gas stream. These include carbon black, kaolin clay, alumina, boric acid, casein and sodium nitrate.
Municipal sludge is dried in an indirect heating dryer to simultaneously dry and pelletize the sludge while preventing the escape of malodorous gases. The product exiting the dryer contains pelletized, undersized and oversized fractions. The dried product is classified to separate the undersized and oversized fractions from the pellets. The pellets are then cooled and stored for subsequent use as a fertilizer or fuel.
The indirect heat transfer dryer made by our company is mainly used in building materials, metallurgy, cement plant for drying of limestone slag, coal powder, slag, clay stone. This dryer is formed by rotary body, lifting blade, driving device, supporting device and sealing ring.Our Company Heavy Industries Ltd. have been producing wide variation of sludge treatment equipment and plants, such as sludge thickener, dehydrator, sludge cake pump, dryer, incinerator and melting furnace, that have been improved by our rich experiences and accumulated technology. Mitsubishi Indirect Heat Dryer is a unique dryer with the great energy saving, higher efficiency and compact sizing, for all type sludge treatment.
1)Higher heat efficiencyBy applying the indirect heating system, heating agent (steam or thermo oil) can be recirculated without mixing with drying sludge/vapor, and higher heat efficiency can be achieved.
2) No needs for carrier gas Dryer housing is of air-tight construction, and the evaporated steam and leakedin air are induced to condenser unit for exhausting at the condensed liquid, that is, no carrier gas for evaporating vapor is required.
3) Easy operationTo meet the sludge variation and required drying rate, the rotor revolution and heating agent temperature (pressure) can be adjusted freely for stable operation.
4) Odorless operation
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