Method for absorbing SO2 in smoke and removing dust from coal boiler
A technology for sulfur dioxide and coal-fired boilers, which is applied to chemical instruments and methods, separation methods, and separation of dispersed particles. It can solve problems such as Bayer red mud pollution, and achieve low operating costs, good effects, and convenient operation.
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Embodiment 1
[0017] Embodiment 1 of the present invention: when the coal-fired coal fired by the coal-fired boiler receives the base total sulfur content S t.ar ≤3%, the flue gas discharged from the boiler when burning coal is firstly dedusted through the pre-dust collector according to the existing method, and then the flue gas dedusted by the pre-dust collector is passed into a chamber equipped with Bayer red mud In the desulfurization tower, the desulfurization tower can be designed as a sealed container connected with the second-stage dust collector to control the particle size of the red mud in the Bayer red mud slurry: 100 mesh to 320 mesh, and the Bayer red mud The red mud liquid-solid ratio of the mud is controlled in the range of 1 to 7:1 and the temperature of Bayer red mud is controlled in the range of 25°C to 65°C and the pH value of Bayer red mud is controlled in the range of 1.5 to 3.5 , so that the flue gas passed into the desulfurization tower can fully contact with Bayer r...
Embodiment 2
[0018] Embodiment 2 of the present invention: when the coal-fired coal fired by the coal-fired boiler receives the base total sulfur content S t.ar When it is greater than 3%, add limestone powder to the coal, and then send the coal mixed with limestone powder into the boiler for combustion. The ratio range of the sulfur content S is best controlled within the range of Ca / S = 1.5-2.0, and the particle diameter of the limestone powder is controlled within the range of 0.01 mm to 2 mm, and then the smoke discharged from the boiler combustion coal is The gas is sent to the pre-dust collector for dust removal, and the flue gas that has been dedusted by the pre-dust collector is passed into a desulfurization tower equipped with Bayer red mud, and the desulfurization tower can be designed as a second-stage dust collector. A sealed container, control the particle size of the red mud in the Bayer red mud slurry: 100 mesh to 320 mesh, and control the red mud liquid-solid ratio of the B...
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