冷凝-吸附技术在苯罐区废气治理中的应用

Application of Condensation-Adsorption Technology in Waste Gas Treatment in Benzene Tank Area

采用冷凝-吸附组合油气回收技术治理某炼厂苯罐区在日常运行过程中产生的大、小呼吸排气,冷凝单元将废气冷却至-45℃,分离回收大部分苯之后废气进入变压吸附单元进一步分离,最终的排放气中苯的含量≤4 mg/m3,满足GB31570-2015《石油炼制工业污染物排放标准》的要求。

The condensation adsorption technology was used to treat brealhing exhaust generated in the daily operation of the benzene tank area of a refinery. The condensing unit cools the exhaust gas to -45℃, after separating and recovering most of the benzene the exhaust gas enters the pressure swing adsorption unit for further separated, and the final benzene content in the venting gas is ≤4mg/m^3, which meets the requirements of GB31570 -2015 〈 Emission standard of pollutants for petroleum refining industry 〉.