Suitable for all bulk materials and temperatures up to 450°C
are typically used for heating, drying or heat treatment of all types of bulk products such as petroleum coke, pasty media, dusts, pastes or slurries. Our heating screw conveyors introduce a defined quantity of heat into the product to heat or melt it, to evaporate liquid components or to start or stop a reaction.
Our heating screw conveyors stand out from other systems available on the world market due to the sophisticated design and use of the proven and tested proven hollow flight principle. It delivers the decisive advantages for maintenance, service life, efficiency and space requirements and guarantees maximum performance in the smallest space. The optional modular insulation is extremely maintenance-friendly, because panels can be quickly removed. This ensures the best possible utilisation of the process-heat-added by minimising radiation losses.
We have also found a solution to compensate for the thermal expansion of the worm shafts: It is completely accommodated by the specially developed KÖLLEMANN carbon bearing with the lowest possible maintenance work and costs. (It is available on selected models, depending on the technical necessity.) The tongue-shaped shaft passages allow individual worm shafts to be easily replaced without dismantling the end wall or other shafts. This minimizes downtimes significantly.
The spectrum of heating screw conveyors ranges from a throughput capacity of a few kg/h up to 60t/h . On request the delivery is completed by including specially adapted piping with modular insulation, which enables the connection to a central inlet and outlet point. All necessary valves and flow meters as well as temperature measurements are optionally pre-assembled in the scope of supply.
To integrate the heating screw conveyors into the planning of your plant, you can use a variety of heat sources such as heat transfer oils, various steam conditioning systems and purely electric heating.
As some bulk products have a strong tendency to stick and bridge, they often form an insulating layer on the hollow flights. Depending on the conditioning of the bulk product, the sludge or the paste, we have developed the tried and tested option of a self-cleaning system for equipping the heating screw conveyor to ensure constant clean surfaces. Since these are the main surface for heat transfer, efficient operation can be ensured.
KÖLLEMANN manufactures the heating screw conveyors in accordance with well-known regulations such as AD2000 or ASME BPVC Sec.8 div.1 in order to ensure maximum safety in handling the heat transfer media.