Direct reduced iron manufacturing system

摘要

Included are: a direct reduction furnace for reducing iron ore directly into reduced iron using a high-temperature reducing gas including hydrogen and carbon monoxide, an acid gas removal unit having an acid gas component absorber for removing, with an absorbent such as an amine-based solvent, acid gas components (CO2, H2S) in a reduction furnace flue gas discharged from the direct reduction furnace, and a regenerator for releasing the acid gas, and a degradation product removal unit for separating and removing a degradation product in the absorbent used by circulating through the absorber and the regenerator.

主权项

1. A direct reduced iron manufacturing system comprising:
a gas heater for heating a gas to produce a reducing gas; a direct reduction furnace for reducing iron ore directly into reduced iron using a high-temperature reducing gas comprising hydrogen and carbon monoxide; an acid gas removal unit including
an acid gas component absorber for removing, with an absorbent, an acid gas component in a reduction furnace flue gas discharged from the direct reduction furnace, anda regenerator for releasing the acid gas; and a degradation product removal unit for separating and removing a degradation product in the absorbent used by circulating between the acid gas component absorber and the regenerator, a purified gas supply line for joining a purifying gas purified in the absorber and comprising hydrogen and carbon monoxide to the gas, and a recovery gas supply line for supplying a recovery gas released from the regenerator and comprising CO2 and H2S into the gas heater.