The HORN vibratory batch charger HVR 700F-2P is a solid and reliable charger for preheated and non-preheated batch into side or end fired furnaces. The charger can therefore be used at regenerative, recuperative or oxy-fuel furnaces with a lateral or frontal open doghouse.
The operating principle is to feed the batch into the doghouse via a vibratory chute which is separated lengthwise and push it onto the glass surface into the furnace via two water-cooled paddles. The end piece of the vibrating chute is made of heat resistant steel and is exchangeable.
The paddles push the batch evenly from the vibrating chute into the glass melting end and create batch piles, thereby accelerating the melting of the batch. The two water-cooled pushers can be operated in 3 modes: totally synchronised, synchronised but shifted by 180°, or independently. The speed of each pusher is inverter-controlled. The stroke length and the submersion depth of each pusher can be adjusted manually.
Compared to the other HVR chargers, the HVR 700F-2P charger is mounted on a rigid construction without rotation. The batch distribution inside the tank is executed by the two individual, adjustable pusher paddles.
This rigid construction allows better sealing of the doghouse by a refractory lined metal hood and a straight heat shield at the charger front. The construction reduces the heat loss at the doghouse and increases the temperature inside. This already causes pre-glazing of the batch inside the doghouse, which allows the use of preheated and non-preheated batch due to the reduced batch dusting.
The improved sealing of the doghouse eliminates secondary air supply and reduces energy consumption. The heat shield also protects the batch charger from too much heat radiation by reinforced insulation.