SUPERHEATING OF AN EXPORT GAS USED IN A REDUCTION PROCESS, IN ORDER TO BALANCE OUT AMOUNT FLUCTUATIONS, AND DEVICE

摘要

A method and a device for balancing out amount fluctuations while simultaneously increasing the temperature of an export gas (2) used in a reduction process (1). A first partial amount (3) of a recycling gas (4) is cooled in at least one recycling-gas cooler (5) to form a cold recycling gas (6) and the cold recycling gas (6) is fed to the export gas (2) in a pressure-controlled and/or amount-controlled manner in order to balance out amount fluctuations of the export gas (2). A second partial amount of the recycling gas (4) is fed to the export gas (2) as hot recycling gas (7) having a higher temperature than the cold recycling gas (6). Then an export gas mixture (8) of the cold recycling gas (6) and the hot recycling gas (7) is introduced into the reduction process (1), wherein the temperature of the export gas mixture (8) is higher than the temperature of the export gas (2). The temperature of the export gas (2) or of the export gas mixture (8) is set in such a way that temperature is higher than the dew point or dew point temperature of the export gas mixture.

主权项

1. A method for balancing out amount fluctuations while simultaneously increasing the temperature of an export gas used in a reduction process, the method comprising steps of:
cooling a first partial amount of a recycle gas in at least one recycle gas cooler to form a cold recycle gas; adding the cold recycle gas to the export gas in at least one of a pressure-controlled and an amount-controlled manner in order to balance out amount fluctuations of the export gas; adding a second partial amount of the recycle gas to the export gas in at least one of a pressure-controlled manner and an amount-controlled manner as a hot recycle gas having a higher temperature than the cold recycle gas; and then introducing an export gas mixture comprising the cold recycle gas and the hot recycle gas into the reduction process, wherein the temperature of the export gas mixture is higher than the temperature of the export gas.