Control method and regulation system of SO_2 and SO_3 by dry sorbent / reagent injection and wet scrubbing

摘要

The present invention relates to a process for producing SO₂And SO₃And to a system therefor. According to the present invention, a sufficient amount of calcium, sodium or magnesium-containing dry absorbent, which particulates are removed from the flue gas to produce a partially purified flue gas and which preferably has a particle size of 1.0 to 2.0 microns or more, SO₃ RTI ID = 0.0 SO /RTI from the partially purified flue gas,₃ RTI ID = 0.0 of SO /RTI ₃To produce flue gas without any flue gas. The above-₃SO /RTI ₂And transferred to a wet scrubber apparatus for removal to produce purified flue gas. In a first embodiment, a desired amount of SO₃SO₂A sufficient amount of dry absorbent is supplied to remove the absorbent. In a second embodiment, the supplements supplied to the wet scrubber wet the dry absorbent,₃A dry absorbent that does not react with the dried absorbent reacted from the flue gas having no absorbent is prepared,₂ RTI ID = 0.0 SO₃SO from the flue gas₂To produce a purified flue gas.