平平加对三氯乙烯废气的吸收处理研究

Study on the removal of trichloroethylene by peregal

三氯乙烯尾气排放对环境和人体的危害不容忽视,选择高效、经济的处理方法迫在眉睫。文中选择平平加O-25为研究对象,探究其对三氯乙烯的吸收处理效果。结果表明:三氯乙烯进口质量浓度为5.36 g/m3,平平加O-25吸收液质量浓度为0.07 mg/mL(5CMC),温度为25℃,用量为50 mL时,对三氯乙烯的吸收效率达到80%。进一步研究了吸收液的质量浓度、温度、用量以及进口三氯乙烯的质量浓度对三氯乙烯处理效率的影响,表明增加吸收液的用量是增加三氯乙烯处理效率的有效手段,当吸收液用量为70 mL时,对5.36 g/m3三氯乙烯气体的吸收效率达90%以上。最后,对吸收液进行饱和吸收研究,采用50 mL 0.07 mg/mL(5CMC)的平平加O-25吸收液,吸收处理气体流量为300 mL/min,质量浓度为5.36 g/m3的三氯乙烯,吸收率保持在80%,稳定运行46 h,这对工业推广有重要意义。

The emission of trichloroethylene could cause harmful impact to environment,hence the search for efficient,low-cost and safe technology for the removal of trichloroethylene is urgently needed. In this work,the absorption of trichloroethylene was studied by using surfactant Peregal O-25 solution. The results show that high removal efficiency up to 80% can be readily achievable for 5. 36 g/m3 of trichloroethylene gas by using 50 mL 0. 07 mg/mL（5 CMC） peregal O-25 solution at 25 ℃. The effects of the peregal O-25 concentration,temperature,the quantity of surfactant solution,and the concentration of trichloroethylene on the removal rate were comprehensively investigated. The increase of the peregal O-25 solution quantity was found to be effective for the increase of removal rate. A removal rate as high as 90% was achieved for 5. 36 g/m3 of trichloroethylene by using 70 mL 0. 07 mg/mL（5 CMC） peregal O-25 solution. When 50 mL 0. 07 mg/mL（5 CMC） peregal O-25 solution was used,a removal rate greater than 80% can be maintained for at least 46 h for 300 mL/min 5. 36 g/m3 of trichloroethylene gas,which suggest that the method proposed in this work is promising for industrial application.