Industrial dryer technology: optimized air circulation

In the face of rising energy prices, brick producer Heluz relies on dryer pallets with an energy-efficient profile. Like the tunnel dryer, these have been supplied by the plant and machine engineering company Keller HCW. The manufacturing know-how came from the sheet metal specialist Graepel, whose engineers also accompanied the development.

On the 2 200-mm-long and 500-mm-wide pallets, the freshly pressed bricks travel through the dryer. During the 16-hour drying process, the bricks and pallets are exposed to temperatures up to 170° C. The special features of the new pallets are their high structural strength, their low dead weight and the excellent air circulation. For the latter, the important factor is their open cross-section, i.e. the ratio of the air perforations to the area of the substrate material: the better the air distribution is, the shorter is the expensive drying time.

The development partner Graepel is a leader in its field: premium manufacturers such as Mercedes-Benz and Caterpillar rely on its ventilation sheets designed to fulfil a similar purpose. The pallet for Heluz is designed for a load of 680 kg, the deflection being a maximum of 5 mm in the lengthways direction or 2 mm crossways. An empty pallet weighs less than 100 kg and consists of moulded, welded and hot-dip galvanized sheet plates.

The results have been convincing: 3 300 pallets have been ordered.

Related articles:

100th anniversary of the Keller fully automatic brick handling machine “Type Hörstel“

Many technical inventions are long forgotten and outdated. Then there are important technical inventions where the basic idea survives for generations and is still universally accepted today. Such an...


Utilizing recovered air in the chamber dryer – possibilities and limitations

Compared to continuous dryers, chamber dryers have the energy drawback that the drying air supplied is not fully saturated when it is discharged from the process. Already very early on, dryer designs...


Another Sabo project for Wienerberger: Solymar, Hungary

At the end of 2012, ­ ?Wienerberger assigned Sabo SA to modernize the production line for handling wet products at its works in Solymar, Hungary. This project follows a series of modernization and...


Barna – new rapid dryer for high production rate

Equipceramic has developed a new rapid dryer for high production rates. It is an evolution from the current rapid dryer using dryer cars as drying supports. All the advantages of the traditional rapid...


Competence in drying – with one face to the customer

Robert Thomas‘ richly traditioned company Rotho will be presenting a general grasp of its entire product and services spectrum for the brick and tile industry at ceramitec 2015. From drying supports,...