气-液错流式多级浮选塔内油水分离效率

Oil-water separation efficiency in a gas-liquid cross-flow multi-stage flotation column

以空气-含柴油污水为实验介质,在2级错流浮选塔中,考察了表观气速、液体流量和含油质量浓度对分离效率的影响。结果表明,总分离效率随表观气速的增大呈先增后降的变化趋势;液体流量的增大会显著降低浮选塔的总分离效率;污水含油质量浓度的提高会增大浮选塔的总分离效率。在液体流量为80 L/h,表观气速为3.75×10-3m/s的条件下,总分离效率较第1级提高了53.03%。

The effects of superficial gas velocity,liquid flux and oil mass concentration on the oil-water separation efficiency were investigated in a two-stage cross-flow flotation column with the air-diesel oil containing wastewater as experimental medium.The results showed that the oil removal efficiency increased with increasing the superficial gas velocity,then decreased when the superficial gas velocity approached to a certain value.The increases of liquid flux could significantly decrease the overall separation efficiency of the flotation column.The increment of oil mass concentration in the wastewater increased the overall separation efficiency.Under the condition of liquid flux 80L/h and superficial gas velocity 3.75×10^-3m/s,the overall separation efficiency for the two-stage flotation column was enhanced over 53.03% than that of the single-stage flotation column.