氨气鼓泡吸收的试验研究——流量和喷嘴口径的影响

Experimental Study of Ammonia Bubble Absorption——Effect of Flow Rate and Orifice Diameter

使用高速摄像装置对氨水的鼓泡吸收特性进行了可视化试验研究。氨气通过喷嘴进入作为吸收溶液的氨水中,形成氨气泡,并最终被吸收溶液完全吸收。试验中,分别测量了喷嘴直径为5mm和6mm情况下,氨气鼓泡吸收过程中的最大气泡体积、气泡最大吸收高度、发泡频率以及吸收过程中的舍伍德数等参数,并给出了最大气泡体积、最大吸收高度以及舍伍德数的试验关联式。结果表明,喷嘴口径的增大,使最大气泡体积和最大吸收高度增大,而发泡频率、单个气泡的舍伍德数减小。

Study on ammonia bubble absorption was performed by a visualization method with a high-speed video camera. The ammonia gas was provided into the aqueous ammonia through a single orifice. The maximum bubble volume, the maximum absorption height, bubble frequency and Sherwood number during the absorption process with orifice diameter at 5mm and 6mm were measured, and the experimental correction formulations about the maximum volume, the maximum height and the Sherwood numbers were obtained. It was clarified that increase of the orifice diameter result in the increase of the maximum volume and the maximum aborption height, however, it result in the decrease of the bubble frequency and the Sherwood number.