Patent EP-2404880-A1 (EP)
Inventor: LEICHTENSCHLAG HILMAR
IPC: C03B3/02
Filed: 2011-05-18
Abstract: The preheating device for indirect and/or direct preheating of molten material (06) made form glass shards and/or glass mixture comprises a heat exchanger (03) having primary side molten material layer with an inlet opening (19), and secondary side flue gas ducts flow through form flue gas and separated form the molten material layer by walls. The molten material is promoted by a molten material feed (13) of the preheating device through the inlet openings and the molten material layer to the molten material feed of the preheating device. The preheating device for indirect and/or direct preheating of molten material (06) made form glass shards and/or glass mixture comprises a heat exchanger (03) having primary side molten material layer with an inlet opening (19), and secondary side flue gas ducts flow through form flue gas and separated form the molten material layer by walls. The molten material is promoted by a molten material feed (13) of the preheating device through the inlet openings and the molten material layer to the molten material feed of the preheating device, where heat contained in the flue gas is transferred from the flue gas through the walls of the molten material. A distribution device (02) is arranged between the molten material feed and the inlet openings in the preheateing device. The molten material is introduced by the molten material feed in the distribution device, and a distribution of the molten material is performed from the inlet openings with a distribution element. The molten material feed is centrally arranged above the distribution device, which has two levels of the distribution element such as distribution sheet metal and distribution stirrer. The distribution sheet metal is not moved in the first step. The distribution element is horizontally aligned or arranged below the molten material feed. The distribution stirrer is moved in the second step, and has a horizontal rotation axis and stirring wings. Two distribution stirrers are arranged as the distribution element in a bottom area of the distribution device. The stirring wing is arranged before the distribution stirrer in relation to other distribution stirrer in direction of an axis of rotation and/or staggered rotation. The stirring wing of the two distribution stirrers is provided with each other. The distribution stirrers have an opposite rotating movement. The molten material layer vertically stands, where the thickness of the molten material layer has a low value in relation to the width and/or height than the distance between two surrounding of the flue gas ducts. The distribution device has a steam extraction. The molten material passes through an initial stage of a drying device before the molten material feed. In the initial stage, the temperature of the molten material is increased and/or the moisture content is reduced. Heated air is directly introduced in the molten material into the drying device, Water vapor is discharged with the air from the drying device redundant from the molten material. The heating device comprises an air heater that flows through form the air, where the heat is indirectly transferred from the flue gas to the air. The air heater is mounted with a flat contact with the heat exchanger.