| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve energy efficiency in removing carbon dioxide from combustion exhaust, to improve space efficiency of a removing apparatus, and to improve total efficiency in treating the combustion exhaust. <P>SOLUTION: A desulfurization section 2 for absorbing and isolating sulfur oxides and for isolating combustion dust from combustion exhaust introduced from outside is disposed in a lower part of an absorption column 1, and a decarbonization section 4 for absorbing and isolating carbon dioxide from the combustion exhaust in which the sulfur oxides are absorbed and separated by the absorption in the desulfurization section 2 is disposed in an upper part of the absorption column 1, whereby the space efficiency of the absorption column 1 is improved. In the desulfurization section 2, the sulfur oxides contained in the combustion exhaust is removed until the concentration of the sulfur oxides is reduced to 1 ppm or lower and until the combustion dust contained in the combustion exhaust is removed to a content of 3 mg/m<SP>3</SP>N or lower, whereby an amine absorbent that absorbs carbon dioxide in the decarbonization section 4 is prevented from deteriorating and the energy efficiency can be improved. <P>COPYRIGHT: (C)2010,JPO&INPIT |
