Method for removing acid gas in fume gas using a spray tower

[0028] The solid content of the red mud slurry entering the absorption tower is adjusted to 15%. Under the action of the circulating pump, the absorption slurry is sprayed out from the spray device at the upper part of the spray tower in a mist form, and fully countercurrently contacts the flue gas entering from the middle of the tower. , the control liquid-gas ratio is 9.0, and the pH value of the absorption slurry is 6.0. SO in flue gas 2 After chemical reaction with red mud slurry and blown oxidized air, SO in flue gas 2 is removed. The desulfurized flue gas is discharged into the chimney after removing the fine droplets brought out by the mist eliminator, and the by-product red mud after desulfurization is pumped out of the absorption system. The concentration of the slurry in the absorption tower was controlled to be 20%, and the residence time of the slurry was 7 hours. absorption tower inlet SO 2 The content is 4387mg / Nm 3 , the export content is 573mg / Nm 3 , the

[0030] The solid content of the red mud slurry entering the absorption tower is adjusted to 20%. Under the action of the circulating pump, the absorption slurry is sprayed out from the spray device at the upper part of the spray tower in the form of a mist, and fully countercurrently contacts the flue gas entering from the middle of the tower. , the control liquid-gas ratio is 8.0, and the pH value of the absorption slurry is 7.0. SO in flue gas 2 After chemical reaction with red mud slurry and blown oxidized air, SO in flue gas 2 is removed. The desulfurized flue gas is discharged into the chimney after removing the fine droplets brought out by the mist eliminator, and the by-product red mud after desulfurization is pumped out of the absorption system. The concentration of the slurry in the control absorption tower was 25%, and the residence time of the slurry was 8 hours. absorption tower inlet SO 2 The content is 4622mg / Nm 3 , the export content is 413mg / Nm 3 , the d

[0032] The solid content of the red mud slurry entering the absorption tower is adjusted to 25%. Under the action of the circulating pump, the absorption slurry is sprayed from the spray device at the upper part of the spray tower in a mist form, and fully countercurrently contacts the flue gas entering from the middle of the tower. , the control liquid-gas ratio is 7.0, and the pH value of the absorption slurry is 8.0. SO in flue gas 2 After chemical reaction with red mud slurry and blown oxidized air, SO in flue gas 2 is removed. The desulfurized flue gas is discharged into the chimney after removing the fine droplets brought out by the mist eliminator, and the by-product red mud after desulfurization is pumped out of the absorption system. The concentration of the slurry in the absorption tower was controlled to be 30%, and the residence time of the slurry was 8 hours. absorption tower inlet SO 2 The content is 5120mg / Nm 3 , the export content is 389mg / Nm 3 , the des