直板开孔叶片旋流塔板压降及液相循环性能实验研究

Experimental Study on Pressure Drop and Liquid Circulation Performance of Perforated Straight-blade Swirl Tray

中文关键词: 旋流塔板  压降  液相循环量  旋流分离

英文关键词: swirl tray  pressure drop  liquid circulation rate  swirl separation

中文摘要:

      为解决现有旋流塔板高气速下雾沫夹带严重、处理量有限、结构复杂等问题，以常规旋流塔板为基础，提出一种新型直板开孔叶片旋流塔板（PSST），以水-空气为工质，通过实验分别研究在重迭度ε和中心液相出口直径D?影响下的气相出口面积A?以及叶片仰角α对PSST压降、液相循环量及漏液点的影响规律。结果表明：PSST干、湿板压降均随孔板动能因子F增大而增大，随A?增大而减小。干板压降随α减小而增大，ε对干板压降影响大于D?。各条件下湿板较干板压降均提高，改变ε时，A?为115 mm2湿板较干板压降提高约33%，增幅最大，85 mm2增幅最小，约22%；改变D?时，85 mm2增幅最大，约33%，115 mm2增幅最小，约20%；不同α下湿板压降差异较小。液相循环量随F因子呈先增后减趋势，改变ε时，A?为115mm2循环量最高，85 mm2最低；改变D?时，85mm2最高，115 mm2最低；α为45°循环量峰值最高。无论改变ε或D?，A?为115mm2漏液点气速最低；α为45°漏液点气速最低。

英文摘要:

      To address the issues of severe mist entrainment, limited processing capacity and complex structure of existing swirl trays at high gas velocities, a new type of straight plate with perforated straight-blade swirl tray (PSST) was proposed based on the conventional swirl tray. Using water-air as the working medium, the effects of the overlap degree ε and the diameter D? of the central liquid outlet on the gas outlet area A?, as well as the blade angle α on the pressure drop, liquid circulation rate and weeping point of PSST were experimentally investigated. The results show that both the dry and wet plate pressure drops of PSST increase with the increase of the kinetic energy factor F of the perforated plate and decrease with the increase of A?. The dry plate pressure drop increases with the decrease of α, and the influence of ε on the dry plate pressure drop is greater than that of D?. Under all conditions, the wet plate pressure drop is higher than that of the dry plate. When ε is changed, the pressure drop of the wet plate with A? of 115 mm2 increases by about 33% compared to the dry plate, which is the largest increase, and the increase with A? of 85 mm2 is the smallest, about 22%. When D? is changed, the increase with A? of 85 mm2 is the largest, about 33%, and the increase with A? of 115 mm2 is the smallest, about 20%. The pressure drop of the wet plate varies slightly under different α. The liquid circulation rate increases first and then decreases with the F factor. When ε is changed, the circulation rate with A? of 115 mm2 is the highest and that with A? of 85 mm2 is the lowest. When D? is changed, the circulation rate with A? of 85 mm2 is the highest and that with A? of 115 mm2 is the lowest. The peak circulation rate is the highest when α is 45°. Regardless of whether ε or D? is changed, the weeping point gas velocity is the lowest when A? is 115 mm2. The weeping point gas velocity is the lowest when α is 45°.