金属丝网错流旋转填料床脱除胶清中氨的性能

Performance of Removal of Ammonia from Rubber Skin by Cross-Flow Rotating Packed Bed with Wire Mesh Packing

应用金属丝网错流旋转填料床对天然胶清中的氨进行空气吹脱脱除.通过正交实验和单因素实验考察了显著性影响大小和影响规律,并得到最佳操作条件.正交实验显示:显著性影响依次为气体流量G>原料氨含量x_w>液体温度T_L>超重力因子β>进料流量L>气体温度T_G.单因素实验显示:脱氨率η随着G,T_L,T_G的增大而增大,随着L的增大而减小,随着β的增大而先增大后减小,气相体积总传质系数k_ya_e有相同的变化规律.应用无因次分析法,建立了超重力胶清脱氨过程中各影响因素对脱氨率影响的数学模型,其相关系数R^2大于0.95,最大偏差9.72%,平均偏差4.88%,说明该关联式与实验数据基本吻合.与传统胶清脱氨方法对比,超重力法具有脱氨率高、易于氨气回收等优点.

The air stripping of ammonia in natural rubber skin was carried out by using cross-flow rotating packed bed with wire mesh packing.The effects of significant influences size and rule and influences were investigated by orthogonal experiment and single factor experiment,and the optimal operating conditions were obtained.The results of Orthogonal test show that the significant of influence to each performance of compact is in sequence gas flow rate G>ammonia content of raw material x w>liquid temperature TL>high gravity factorβ>feed flow L>gas temperature TG.The results of single factor experiment show that the ammonia removal rate increases with the increase of gas flow,liquid temperature and gas temperature,decreases with feed flow rate increasing,furthermore increases first and then decreases with the growth of the high gravity factor,which has the same change rule as the gas phase volumetric overall mass transfer coefficient k ya e.With dimensionless analysis method,a mathematical model was established for the influence of various factors on the ammonia removal rate in the process of high gravity ammonia removal,of which correlation coefficient R^2 is greater than 0.95,the maximum deviation is 9.72%,and the average deviation is 4.88%,indicating that the association formula can basically coincide with the experimental data.Compared with the traditional method of removing ammonia from rubber skin,the high gravity method of removing ammonia from rubber skin has the advantages of high ammonia removal rate and easy to recycle ammonia gas,etc.