An absorbent feeding system (feed controller, hopper device) and SO2, detector and computer control system, etc. Absorbents flow high-speed through the high-voltage electrostatic corona charging area generated by the injection unit, giving the absorbent a strong static charge (usually a negative charge). When the absorbent is sprayed into the smoke air stream through the nozzle of the injection unit, the absorbent particles, because they all carry the same symbolic charge, and thus mutually exclusive, quickly spread in the flue gas, forming a uniform suspension state, so that the surface of each absorbent particle is fully exposed to the flue gas, with SO2, the reaction opportunity greatly increased, thereby improving the desulfurization efficiency. Moreover, the activity of the absorbent particles is greatly improved, reducing the retention time required for complete reaction with SO2, which is generally completed in about 2 seconds, thus effectively improving the removal rate of SO2 and shortening the reaction time.
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