复配表面活性剂水溶液吸收法处理乙酸丁酯废气

Absorption treatment of butyl acetate waste gas by compound aqueous surfactant solution

以非离子型表面活性剂为吸收剂吸收乙酸丁酯废气,研究了不同类型的Tween表面活性剂和Span-80对乙酸丁酯废气的吸收效果,并以复配表面活性剂为吸收剂分析了吸收剂温度、液气比、进塔浓度对乙酸丁酯废气吸收率的影响。结果表明,Tween-80水溶液对乙酸丁酯吸收率最高,加入Span-80后不但能够消除起泡现象还能提高乙酸丁酯吸收率,其加入量越大吸收率越大。以体积浓度3.0%的Tween-80与3.0%的Span-80复配水溶液吸收乙酸丁酯废气,在吸收剂温度为10℃,进塔废气流量为1.0 m^3/h,液气比为15 L/m^3时,乙酸丁酯吸收率可达90.65%。吸收剂在解吸后循环使用,其吸收率为81.21%,且随着解吸次数的增加吸收率略有降低。

Non-ionic surfactants were used as absorbents to absorb butyl acetate waste gas.The absorption performances of different types of Tween surfactants and Span-80 on butyl acetate exhaust gas were studied.By using a compounded surfactant as absorbent,the effects of absorbent temperature,liquid to gas ratio,and feed concentration on the absorption rate of butyl acetate waste gas were analyzed. The results showed that Tween-80 aqueous solution has the highest absorption rate of butyl acetate.The addition of Span-80 could not only eliminate the foaming phenomenon but also proportionally increase the absorption rate of butyl acetate.With a aqueous solution containing 3.0%(v/v) Tween-80 and 3.0%(v/v) Span-80,butyl acetate absorption rate can reach 90.65% at absorbent temperature of 10 ℃,exhaust gas flow rate of 1.0 m^3/h and liquid-gas ratio of 15 L/m^3.The absorption rate of the absorbent becomes 81.21% after cyclic desorption and decreases slightly with further desorption.