Patent DE-102008017729-A1 (DE)
Title: Plant for heat treating sheet glass/other panel-like materials, comprises a roller hearth furnace, a cooling station, a loading station in the form of receiving roller table, and an unloading station in the form of removing roller table
Inventor: ERDMANN WOLFGANG
IPC: C03B25/08
Filed: 2008-04-07
Abstract: The plant comprises a roller hearth furnace (1), a cooling station (2), a loading station (3) in the form of a receiving roller table, and an unloading station (4) in the form of a removing roller table. The furnace is implemented loadably with a combined inlet/outlet furnace door (5) on one side. The cooling station is implemented as heat exchanger, which comprises two roller paths independent from each other for a glass charge. The loading and unloading stations are arranged in the flow path on the side of the heat exchanger turned away from the furnace. The plant comprises a roller hearth furnace (1), a cooling station (2), a loading station (3) in the form of a receiving roller table, and an unloading station (4) in the form of a removing roller table. The furnace is implemented loadably with a combined inlet/outlet furnace door (5) on one side. The cooling station is implemented as heat exchanger, which comprises two roller paths independent from each other for a glass charge. The loading and unloading stations are arranged in the flow path on the side of the heat exchanger turned away from the furnace. A new, entering glass charge and a heat treated, exiting glass charge on the path of the furnace are present in the heat exchanger during a heat exchange phase. A heat transition takes place from the entering glass charge to the exiting glass charge. A pre-load station is arranged between the furnace and the heat exchanger and is implemented as flow station. A post-cooling station is arranged in the flow path between the heat exchanger and the unloading station and in which the entering glass charge is cooled on a handling temperature. The heat exchanger is provided with an air circulation device. The transport devices in the heat exchanger are separated from each other using air flow technology. The air circulation devices lead the air flow transverse to the flow direction at the glass charge. The duration of the heat exchange phase in the heat exchanger coincides with the period of the glass charge in the furnace. The transport device is arranged one above the other or next to each other in the heat exchanger. The heat exchanger or the transport device and the furnace are vertically or horizontally displaceable. The pre-load station is stationarily arranged in the flow path of the glass charge aligned with the unloading station. A second heat exchanger is arranged between the heat exchanger and the unloading station and/or the post-cooling station. At a product final temperature, the glass charge in the furnace is 600-650[deg] C, the temperature absorption of the exiting glass charge is 150-180[deg] C in the first heat exchanger and 100-150[deg] C in the second heat exchanger, and the temperature increase of the entering glass charge is 230-330[deg] C. The air temperature in the heat exchanger is constant on an average value above the final temperature of the entering glass charge and below the final temperature of the exiting glass charge. Each heat exchanger is provided with the air circulation devices such that the energy released during slowing down of the air circulation device is used for propelling the other air circulation device. The heat exchanger comprises a raisable cap on the upper side and/or tiltable valve on the lower side for disposing break glass, a laterally bent partition below the upper transport device and a laterally bent running base wall underneath the lower transport device for collecting and disposing break glass. Independent claims are included for: (1) a furnace for a plant for heat treating sheet glass or other panel-like materials; and (2) heat exchanger for a plant for heat treating sheet glass or other panel-like materials.