| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an exhaust gas treatment agent which is used for removing acid gas from exhaust gas of a refuse incineration plant, and which maintains high reactivity with acid gas and furthermore, has reduced sticking property to transport piping, reduces clogging of a bag filter due to the treatment agent, achieves low CO concentration in the exhaust gas and a small COD value of fly ash wash water and achieves little elution of heavy metal included in the fly ash, and to provide a method of producing the exhaust gas treatment agent.SOLUTION: The exhaust gas treatment agent is a slaked product produced by firing limestone containing MgCOof 5 wt.% or more as dolomite or MgO at a temperature of 900-1,200°C, then slaking the fired lime stone by adding slaking water to which diethylene glycol of 1 wt.% or less with respect to a fired product is added and maturing the slaked product. The exhaust gas treatment agent contains MgO+Mg(OH)of 5 wt.% or more in terms of MgO, and has a specific surface area of 30 m/g or more and less than 50 m/g, and a fine pore volume of 0.15 cm/g or more and less than 0.3 cm/g.</p> |
