• 作者： Ho, Ch'un-Sung; Shih, Shin-Min
• 中文摘要： 以微分固定床探討在模擬噴霧乾燥和乾式廢氣除硫程序中之袋式過濾器裡的反應條件下,影響氫氧化鈣和二氧化硫反應的因素。相對溼度在8%以上,反應才會發生。相對溼度增加,反應速率和氫氧化鈣的最終轉化率隨著顯著增加; 溫度的影響較和緩。相對溼度30%以上,二氧化硫濃度對反應才有影響。因為亞硫酸鈣在氫氧化鈣表面形成無法穿透的產物層,所以氫氧化鈣無法完全轉化。本實驗氫氧化鈣顆粒小於100.mu.m,其顆粒內的質傳阻力並不重要。氫氧化鈣的硫酸化反應可以拋物線速率法則來描述。
• 英文摘要： Factors influencing the reaction of hydrated lime with SO/sub 2/ were studied in this present work by using a differential reactor and a gas mixture of N/sub 2/, SO/sub 2/, and H/sub 2/O under the conditions similar to those in the bag filters of the spray-drying and dry FGD processes. The reaction occurred only at relative humidities greater than 8%. Increasing the relative humidity of the gas significantly increased the reaction rate and final conversion of hydrated lime. Temperature had a mild effect. The reaction depended on the SO/sub 2/ partial pressure when the relative humidity was greater than 30%. The conversion of Ca(OH)/sub 2/ was limited by the formation of an impervious CaSO/sub 3/-(1/2)H/sub 2/O layer on the Ca(OH)/sub 2/ solid surface. For the hydrated lime particles(< 100.mu.m), the intraparticle mass transfer resistance was insignificant. The sulfation of Ca(OH)/sub 2/ could be described by the parabolic rate law.
• 中文關鍵字： 二氧化硫; 氫氧化鈣; 脫硫; 微分固定床; 噴霧乾燥; 相對濕度; 質量傳遞
• 英文關鍵字： Sulfur Dioxide; Calcium Hydroxide; Desulfurization; Differential Fixed Bed; Spray Drying; Relative Humidity; Mass Transfer