采用泄漏检测与修复（LDAR）技术对某石化厂的聚丙烯装置、甲乙酮装置、MTBE装置和气分装置开展全面泄漏检测和统计分析工作，发现泄漏密封点287个，泄漏率1.07%，其中修复209个，修复率72.8%；修复后VOCs排放量为28.2919 t/a，减排率为37.6%。通过实施LDAR技术，减少了VOCs排放，取得较好的经济效益和环境效益。

In order to find and decrease leakages in a petrochemical plant,the leakage detection and repair (LDAR) technology is used to perform overall leakage detection and statistics analysis on a petrochemical plant's production facilities of polypropylene,methyl ethyl ketone,MTBE and gas separation.As a result,287 sealing points that happen leakage are found,the overall leakage rate is 1.07%.Of which,209 leakage points have been repaired by LDAR,with repair rate of 72.8%.The VOCs emission amounts to 28.291 9 tons per year after these repairs,and the emission reduces by 37.6%.Through the implementation of LDAR,the VOCs emissions in this petrochemical plant are reduced,and good economic and environmental benefits are achieved.