... equipment and plants, such as sludge thickener, dehydrator, sludge cake pump, dryer, incinerator and melting furnace, that have been improved ... , for all type sludge treatment. 2. Characteristics 1) Higher heat efficiency By applying the indirect heating system, heating agent (steam ... the evaporated steam and leakedin air are induced to condenser unit for exhausting at the condensed liquid, that is, no ...