Device for preheating fragments of glass and/or glass mixtures using flue gas, has lower heat exchanger portion that includes flue gas channels with closed cross section, so that heating of molten material is performed indirectly

摘要

The device has a preheating hopper (01) that conveys the molten material from top to bottom. Several flue gas channels (02) in an upper heat exchanger section (05) are formed with downwardly open cross-section, so that the water vapor generated by heating of the molten material is flown into the flue gas channel and is discharged through the flue gas (04). The flue gas channels (03) in the lower heat exchanger portion (06) are formed with closed cross section, so that the heating of the molten material is performed indirectly, without direct contact between flue gas and molten material.