| 摘要 |
PURPOSE:To execute adequately and inexpensively oxygen enrichment in accordance with the change of a blast furnace operation by taking out part of blast air from a blast pipe between a blower and a blast furnace, producing oxygen and introducing again the oxygen into the blast pipeline. CONSTITUTION:The atm. air is taken in through an air intake port 1 and is passed through a suction filter 2, then the air is increased in pressure by the blast furnace blower 3 by which the hot wind is fed to the blast furnace 4. Part of the blast air is discharged through a control valve V-3 and is fed to a scrubbing and cooling column 5 where the air is cleaned up and is adiabatially compressed. Such air is supplied to an oxygen producing device 6. The oxygen generated in the device 6 is passed through a flow rate control valve V-4 according to the set purity and is introduced to the suction or discharge side of the blower 3. The oxygen is thoroughly mixed with the air in a mixing device 7 so as to attain the set O2concn. and the pressure thereof is increased by the blower 3 then the air is fed to the furnace 4. The driving power required for the oxygen enriching method is reduced by the above-mentioned method.
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