| 摘要 |
<p>PURPOSE: To remove efficiently carbon dioxide and black smoke in combustion gas by increasing the concentration of dissolved lime by controlling the temperature of lime water to be sprayed to a reaction chamber. CONSTITUTION: Combustion gas containing carbon dioxide is introduced into a reaction chamber 1, and lime water of a saturated aqueous solution of supernatant obtained by mixing lime with water is pressurized and sprayed to the reaction chamber 1 to react with carbon dioxide, producing granules into which calcium carbonate and soot of black smoke are incorporated. The calcium carbonate mixed with soot is separated by a filter 4 in the reaction chamber 4 and taken out, unreacted lime water deposited in the bottom part of the reaction chamber 1 and water which is separated by the reaction are circulated by a pump 2 and led again to the reaction chamber 1, and a means 8 for supplying lime water or lime is installed in the circulation passage 3 of lime water. Besides, a heat radiation means 9 for the lime water, a heating means 6, and a temperature sensor 5 are installed in the passage 3. The heating means 6 is controlled based on the detection results of the sensor 5 so that the temperature of lime water is controlled at room temperature to 80 deg.C.</p> |
