Mitsubishi 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.

2. Characteristics

1) Higher heat efficiency

By 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 operation

To 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

Air tight construction can prevent the leakage of odor.

3. Principle

Mitsubishi Heavy Industries Ltd. developed to dry pasty subjects as sewage sludge, with indirect heating by heating agent (steam or thermal oil)

1) Sludge stream

Dehydrated sludge is supplied to the dryer where it is agitated and dried by discs at rotors. Dried sludge is discharged by the driving force of disc mechanism.

2) Evaporated vapor stream

Moisture of sludge is evaporated and induced to the outside through vapor condenser to liquid phase.

3) Heating agent stream

The heating agent is supplied to rotor shaft and each discs, as well as bottom heating jacket .