摘要
故障模式影响及危害性分析(FMECA)广泛应用于石油化工企业来提高系统可靠性,针对危害度评价方法风险优先数分析方法RPN存在的缺陷,提出了一种针对流程工业,考虑维修成本的MRPN分析方法。改进后的MRPN分析方法:1)考虑了维修成本,更适连续流程工业的实际情况,评价方法更为全面;2)风险识别的最大分辨率提升到传统RPN方法的400%左右,能够更有效地鉴别不同故障模式的风险大小;3)改用加乘算法模型,使得评价方法更为稳定。最后,使用MRPN方法对宁夏石化第二化肥厂的熔融尿素泵进行了危害性分析,取得了良好的分析效果。
Failure Mode, Effect and Criticality Analysis （FMECA） is widely used in petrochemical industry as it helps improve the system reliability, identify the weakness of the systems. However, there are obvious drawbacks if we still use traditional RPN method to evaluate continuous process industry. Taking account of the maintenance expenses which have an significant impact on continuous production, the modified risk priority number evaluation method named MRPN was proposed.I） Taking the maintenance fees into account is more practical for continuous process industry; 2）The MRPN method increases the maximum resolution to 400% of that of traditional RPN method, and can identify the risk priority number of various modes of failure more effectively; 3） the algorithm is more robust. At last, a case study for MRPN modeling and analysis based on the melting urea pump of Ningxia Petrochemical NO. 2 chemical fertilizer plant was conducted. The result shows that the MRPN method is better than traditional RPN method.
出处
《工业技术创新》
2014年第2期168-173,共6页
Industrial Technology Innovation
