REDUCTION PROCESSING METHOD FOR CARBON DIOXIDE DISCHARGE AMOUNT IN FLUE GAS

摘要

To develop a carbon dioxide discharge amount reduction processing method creating an economic effect while reducing the carbon dioxide discharge amount in a flue gas.SOLUTION: There is provided a reduction processing method for the carbon dioxide discharge amount in a flue gas using a caustic soda solution as a carbon dioxide absorbent. The method comprises a caustic soda synthesis process, a reduction processing process for the carbon dioxide discharge amount in the flue gas and a process for making carbon dioxide recyclable. The caustic soda synthesis process is a process of: generating a caustic soda solution and calcium carbonate precipitate using a natural caustic soda solution prepared by dissolving the refined powder of caustic soda mineral in water by a causticizing reaction using hydrated lime; and carrying out a solid-liquid separation to obtain a synthetic caustic soda solution. The reduction processing process for the carbon dioxide discharge amount in the flue gas comprises making carbon dioxide in the flue gas absorb in the synthetic caustic soda solution by gas-liquid countercurrent contact of the synthetic caustic soda solution with a decontaminated flue gas to reduce carbon dioxide by immobilizing as a synthetic sodium carbonate.SELECTED DRAWING: Figure 1