Unique know-how combination

The batch preheater is an integral part of the BATCH3 concept, together with the EME-NEND® batch charger and the special IRD® doghouse. This development is made possible by the unique combination of batch and melting know-how available within the SORG Group. The BATCH3 concept offers a reduction in energy consumption, lower dusting, less induced air, and an optimal batch distribution in the furnace, all resulting in better glass quality.

EME-NEND ® batch charger

This latest generation batch charger enables complete sealing of the doghouse with all the attendant advantages. In the case of a conventional charger (see figure 1) there is always an opening between the charger and the doghouse and through this expensive energy is lost. In addition, cold air can be drawn into the furnace from outside and exert a negative influence on the furnace atmosphere. One result of the use of a sealed doghouse is a reduction in NOx emission as there is less induced air to disturb the combustion process. The EME-NEND® charger (see figure 2) avoids this problem and offers further advantages.

The batch flows down from the storage hopper and is charged into the furnace by two or three screw chargers – the number used depends on the required charging capacity. The charging speed of each screw is independently adjustable. A pusher located in front of the screws makes a two-dimensional movement thereby splitting the batch piles into even portions and pushes each one forwards into the melt. The pusher frequency is also adjustable. This arrangement gives the best possible batch distribution in the furnace and optimises the melting process.


Fig. 1
 
Fig. 2


IRD ® Doghouse

The maximum advantages of the EME-NEND® batch charger are only obtained when it is used in combination with the newly developed Increased Radiation Doghouse (IRD®). The IRD® design is much wider and has a much higher superstructure than a conventional doghouse. The sketches indicate the lower losses of the IRD® concept (figure 2) compared with a conventional doghouse (figure 1). The larger opening to the furnace allows increased radiation into the doghouse, as shown in the thermograms of a conventional doghouse (figure 3) and the IRD® doghouse (figure 4). This improvement ensures that the material on the surface of the batch piles is glazed before it enters the melter. This has the advantage that there is much less dust and carryover when the high velocity furnace gases sweep over the batch in the melter.


Fig. 3
 
Fig. 4
  

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