Blast Furnace Dehumidification Device

1) Reducing the coke ratio: For every 1g/Nm3 decrease in humidity in the wind, the coke ratio can be reduced by approximately 0.8-1.0kg/t Fe.

2) Can increase coal injection rate: For every 1g/N m3 decrease in moisture content in the wind, the combustion zone temperature can be increased by 9 ℃. Due to the fact that H2 generated by decomposition can participate in the reduction reaction and release one-third of the heat, it is necessary to increase the wind temperature by 6 ℃ to compensate. Therefore, it is possible to spray 1.5 to 2.0kg/t Fe more coal powder, which is equivalent to spraying 1.2 to 1.6kg/t Fe more coal powder based on a replacement ratio of 0.8.

3) Can increase the blowing volume: Every 10 ℃ decrease in the inlet temperature of the blast furnace can increase the air quality and flow rate by about 5%. When the atmospheric temperature is around 30 ℃, after using the full freezing dehumidification method in the blast furnace blast furnace, the temperature of the air entering the blower is between 5-8 ℃, which can increase the density of the blast air, equivalent to an increase of about 9% in air volume. This has a compensating effect on blast furnaces with insufficient air supply capacity.

4) Stable furnace condition: In the blast furnace, the blast dehumidification technology enables the blast furnace to achieve stable, dehumidifying, and cooling effects, eliminating the adverse effects of atmospheric humidity changes on the furnace condition. The absolute humidity is stable at around 10g/Nm3; This can ensure the stable operation of blast furnace production.

5) Reduce blower power: For blast furnace blowers with large air volume, the power saved by the suction side full refrigeration dehumidification method can offset the power consumption of the dehumidification device itself, and even have surplus.

6) Increase production: Every 1g/Nm3 decrease in humidity can increase ironmaking production by 0.1% to 0.5%. It can increase the production of blast furnaces by about 3%.

7) Secondary dust removal: The dehumidifier can perform secondary dust removal, reducing fan blade wear and improving the service life of the blower rotor.