侧、轴向夹角进料水平撞击流反应器研究

Study on Level Impinging Stream Reactor with Feeding from Side and Axial Direction

以空气 -水 ,空气 -CMC(羧甲基纤维素 )水溶液体系 ,采用脉冲示踪和稳态微压差法测取相关数据 ,研究了两侧及轴向进料水平撞击流管式反应器中表观液速 UL、气体喷出速度Ug、及液体粘度 μ在 撞击流和非撞击流下对反应器内平均气含率的影响。得到了当气体喷速为 170m·s-1,管内表观液速为 0 .6m·s-1时 ,气含率εg较大 ,液相分散显著 ,气液接触面较大。由实验测得UL、Ug、μ ,并将其关联得到在上述条件下气含率εg 的关联式 :εg =0 .10 5 8UL1.56Ug0 .573 μ-1.74。并以湿法磷酸 (含P2 O52 2 % ) -氨体系进行热态试验 ,结果表明 :气氨喷速为 170m·s-1,磷酸进料流速为 3.3m·s-1,管内物料表观流速为 0 .6m·s-1时 ,反应器内氨负荷较大 ,混合情况好 ,反应较彻底 ,氨逸出率最低。

The effects of superficial liquid velocity U L , gas spraying velocity U g  and liquid viscosity μ on gas hold up ε g  were investigated experimentally with pulse tracing and micro differential pressure method in a impinging stream reactor. It is found that,when U g =170 m·s -1 and U L =0.6 m·s -1 ,the gas hold up ε g  becomes fairly large and the liquid phase is obviously dispersed,leading to alarge contact area between gas and liquid.From the experimental date,a correlation of the gas hold up ε g  with U L ,U g and μ was obtained:ε g =0.1058U L 1.56 U g 0.573 μ -1.74 .Meanwhile,a test with wet phosphoric acid and ammonia was carried out in a heated state,which showed that,for U g =170 m·s -1 , U L =3.3 m·s -1 ,and  U L  =0.6 m·s -1 , the reactor would achieve a relatively high ammonia load and efficiency.