Applications of RBI on leakage risk assessment of direct coal liquefaction process

作者：Dou Zhan^*; Jiang Jun Cheng^*; Wang Zhi Rong; Pan Xu Hai; Shu Chi Min; Liu Long Fei

来源：Journal of Loss Prevention in the Process Industries, 2017, 45: 194-202.

DOI：10.1016/j.jlp.2016.12.006

• Direct coal liquefaction process
• Risk-based inspection
• Leakage risk assessment
• Critical location
• Inherently safer design

Direct coal liquefaction process is the core of coal-to-liquids manufacturing. Due to the strict operating conditions and quantities of hazardous materials involving in the process, conceivable occurrence of leaking may lead to devastating accidents. In this paper, the risk-based inspection (RBI) technique is introduced to be applied in the leakage risk assessment of direct coal liquefaction process. According to the on-site investigation, four leakages rooted in abrasion, untightened seals, fatigue damage and cracks are determined. The hazardous materials potentially participating in the distinctive leakages consist of dry gas, hydrogen, hydrogen sulfide, sulfur, pulverized coal and liquefied light and heavy oil. Concerning the different occurrence probabilities and consequences of leakage, risk assessment and classification have been performed at all critical locations along process of direct coal liquefaction. Therewith, the corresponding scenarios and outcomes of leakage are determined, and accordingly detecting scheme and methods are proposed. The implementation of leakage risk assessment reinforces the inherently safer design of direct coal liquefaction process.

• 出版日期2017-1