The reflux cooler is especially suitable for granular free flowing bulk materials, as it is a contact cooler. The material to be cooled slowly flows along the water cooled cooling faces in counter current fashion. Water does not of course come into contact with the bulk material.
The special design of the contact areas between the cooling segments and the cooling spirals ensures that a high degree of heat exchange is achieved. A constant temperature of the cooled bulk material is achieved by automatically controlling the flow of cooling water.
The reflux cooler is compact in design, e.g. 260 m² of cooling faces are incorporated in a cooler of 1 m³. The result is a high cooling capacity in the smallest volume. Furthermore, due to the modular construction, sections can be added to increase cooling capacity. The complete cooling face is used to its optimum advantage, as a corresponding dosage closure device guarantees an equal distribution of the bulk material throughout the cooler.
The reflux cooler can also be used to heat free flowing bulk material.