共軛環填料萃取塔的傳質性能研究* 黃 洪 鄧淑華** 楊卓如 陳煥欽 摘 要 在φ120的不銹鋼填料塔中,以φ16共軛環塔填料為研究對象,分別選用正丁醇-丁二酸-水和30%TBP(磷酸三丁酯)的煤油-醋酸-水2種不同界面張力的體系進行試驗,測定了該填料在不同兩相流速下的表觀傳質單元高度,和相同條件下測定的同尺寸鮑爾環、拉西環和θ環作了比較,θ環的表觀傳質單元高度(Hoxp)比共軛環小,但共軛環的(Hoxp)分別比鮑爾環小16%, 比拉西環小25%.本文對影響傳質性能的因素也進行了分析. 關鍵詞 塔填料; 傳質性能; 傳質單元高度 中圖資料分類號 TQ028.32 STUDY ON MASSTRANSFER PERFORMANCE OF EXTRACTION COLUMN PACKED WITH CONJUGATE RING HuangHong Deng Shuhua YangZhuoru Chen Huanqin (Res. Inst. of Chemical Eng., South China Univ. of Tech.,Guangzhou 510640) Abstract Ina 120mm extraction column, two different extractionsystems, butanol-succinic-water and 30%(TBP) kerosene-aceticacid-water are chosen to examine the mass transfer performanceof φ16 conjugate ring under various continuous phase and disperse phase velocities, and compared with that of same size rashing ring, pall ring and θ ring under the same conditions. Results show that Hoxp (height of mass transfer unit based on plug flow and continuous flow) of conjugate ring is bigger than that of θ ring, but less than that of pall ring and rashing ring at a rate of 16% and 25% respectively. Factors of affecting mass transfer were discussed. Key words tower packing; mass transfer performance; height of mass transfer unit 拉西環、鮑爾環是兩種傳統的塔填料,在精餾、萃取等化工過程中都有應用,θ環是一種傳質效率較高的塔填料,共軛環[1]填料是華南理工大學研制的一種高效散堆填料,在汽-液傳質過程中它與拉西環、鮑爾環相比,具有通量大、阻力小、傳質效率高等優點,和θ環相比具有阻力小的優點,已在精餾和吸收過程中得到廣泛應用,但在萃取過程中還未得到應用,主要由于缺少液-液傳質過程中的兩相流動和傳質數據. |