在厂区将苯乙烯装车时，苯乙烯挥发废气大量溢出导致环境污染。设计了一套对苯乙烯废气进行冷凝回收的装置，通过单因素实验、正交试验等考察了水浴温度、入口浓度、冷凝管长度、冷凝温度这4个因素对该装置回收苯乙烯废气的影响规律。研究结果表明，入口浓度对回收苯乙烯废气有较大的影响，在其他条件相同时，冷凝管长度越短，得到的冷凝液体积越多；冷凝管长度越长，苯乙烯废气出口浓度越低。水浴温度对苯乙烯废气的冷凝效果影响不大。通过正交试验比较影响因子的大小为冷凝温度 > 入口浓度 > 水浴温度 > 冷凝管长度，调节冷凝温度对该装置的冷凝效果有较大的影响。

Volatilized styrene waste gas will overflow into air when loading styrene in the factory area, leading to environmental pollution.A set of equipment for condensing and recovering styrene-containing waste gas is designed.Single factor experiment, orthogonal test and other measurements are utilized to investigate the effects of water bath temperature, inlet concentration, length of condenser tube and condensing temperature on the recovery of styrene-containing waste gas.The results show that the inlet concentration has a great influence on recovery of styrene.Under the same conditions, the shorter the condenser tube, the more the produced condensate;the longer the condenser tube, the lower the outlet concentration of styrene in effluent waste gas.The bath temperature has little influence on the condensation of styrene.According to orthogonal test, the influence degree order of four factors from high to low are as follows:condensing temperature, inlet concentration, temperature of water bath and length of condenser tube.Adjusting the condensing temperature has a great impact on the condensing effect of the equipment.