板式塔降液管的机械消泡研究_李育敏.pdf

36 8 Vo.l 36 No. 8 2008 8 CHEM ICA L ENGINEERING ( CH INA) Aug. 2008 李育敏, 刘炳炎, 俞晓梅, 姚克俭 ( , 310032) : , V , V , , , , , V , , , 13. 1% ) 36. 2% , 10. 5% ) 32. 5% , 7. 1% ) 33. 2% , 5. 1% ) 24. 6% , , : ; ; ; : TQ 051. 81 : A : 1005-9954( 2008) 08-0005-04 M echanical defoam ing in downcom er of tray column LI Yu-m in, LIU Bing-yan , YU X iao-m e,i YAO Ke-jian ( St te Key L bor tory of Breed ing B se ofG reen Chem istry-Synthesis Technology, College of Chem ic l Engineering nd M teri ls Science, Zheji ng Un iversity of Technology, H ngzhou 310032, Zheji ng Province, Ch in ) Ab tract: A new structur l component settled in the dow ncomer of tr y column for mech n ic l defo m ing w s developed. The structur l component w s composed of sever l columns of corrug ted sheets in p r llel e ch other. The corrug ted sheet h d the form of + . The componentw s h lf-mi m ersed in the downcomer froth l yer. The froth liquid f lling from weir mi p ctedw ith the corrug ted sheets nd thew ved froth in the downcomer rubbedw ith corrug ted sheets continuously, wh ich cceler ted the froth rupture nd reduced the froth height in the downcom er. The corrug ted sheetw ith the form of + exerted force dow nw rds on the liqu id in the downcom er, w hich reduced the cle r liqu id height in the downcomer. The expermi en t l resu lts ind ic te th t the structur l componen t is ble to dmi inish the froth height by 13. 1% -36. 2% nd the cle r liqu id height b