本研究以台灣某營運的日操作900噸(900 ton/day)焚化廠在焚化處理過程中產生的酸性氣體(HCl與SOx)以消石灰噴注系統吸收去除作實務效能探討，實務上原始廢氣中所含HCl濃度約1600 ppm，SOx濃度約600 ppm，消石灰日使用量範圍在0-40 ton/day，研究發現在低、中使用量(0-20 ton/day)時，HCl去除量越高時，SOX去除量有降低的趨勢；消石灰在高使用量(20-40 ton/day)時，與HCl的吸收去除量已接近飽和狀態，而SOX的吸收去除效果有持續增加中；消石灰在最大使用量時，HCl去除與消石灰量已呈現無相關的現象，SOX的吸收去除效果仍有持續增加中。探討酸性氣體/消石灰之去除效能比中發現，SOX與HCl在同時競爭吸收的過程中SOX/HCl之濃度去除效率比範圍會落在0.16至0.28之間，顯示消石灰吸收HCl去除量高於SOX去除量。由消石灰使用量與HCl去除量之對數相關性(correlation coefficient, r)高達0.942及消石灰使用量與SOX去除量之線性相關性(r)高達0.933，顯示消石灰對於去除HCl有其最大極限，SOX可持續增加去除量。 This study discussed the efficiency of the practice using the slaked lime injection system to absorb and remove the acidic gas (HCl and SOx) generated during the incineration in an operating incineration plant in Taiwan with a daily capacity of 900 ton/day. In the practice, the concentration of HCl contained in the original waste gas was about 1600 ppm; the concentration of Sox was about 600 ppm; and the daily usage of the slaked lime ranged between 0-40 ton/day. The results showed that at the low and medium usages (0-20 ton/day), the SOx removal quantity showed a declining tendency when the HCl removal quantity grew higher; at the high usage of slaked lime (20-30 ton/day), the HCl absorption and removal quantity was close to saturation and the SOx absorption and removal efficiency continued to increase. At the maximum usage of slaked lime (30-40 ton/day), the HCl removal appeared irrelevant with the quantity of slaked lime and the SOx absorption and removal efficiency continued to increase still. Discussion on the acid gas/slaked lime removal efficiency ratio found that the SOx/HCl concentration removal efficiency ratio range fell between 0.16 and 0.28 in the process of absorption competition by SOx and HCl at the same time, indicating a higher HCl removal quantity than the SOX removal quantity under the absorption by slaked lime. The logarithmic correlation (correlation coefficient, r) of the slaked lime usage and the HCl removal quantity was up to 0.942 and the linear correlation (r) of the slaked lime usage and the SOx removal quantity was up to 0.933, which showed that the slaked lime had a maximum limit in the removal of HCl and SOx removal quantity could be increased continuously.
