An Industrial plant consist of a chemical reactor which uses two chemical substa

Question

An Industrial plant consist of a chemical reactor which uses two chemical substances as reactant materials (A&B;). Material A is already found inside the reactor, while material B is added continuously at constant flow rate. The reactor is cooled by natural convection to reject the exothermic heat to the surrounding. The reactor is equipped with a safety valve that opens when the pressure inside the rector exceeds certain limit (30% of the operation pressure). The reactor is equipped also with emergency cooling system that initiates to work when the pressure sensor inside the reactor senses (15% overpressure). A special ventilation system starts to work when toxic material release from the reactor exceeds certain limit. All the systems are fed with common electrical supply. The release of the resultant substance cause toxic effect on the workers inside working area. Draw event tree for initiating event corresponds to increase of material B How rate, showing systems interaction and the related paths that leads to either reactor explosion or workers infection due to the increase of toxic material concentration limit inside the working area. Then calculate the probability of the different risks associated with the sequence of events classification (toxic, explosion, toxic + explosion). USE: The failure probability rate obtained from the fault tree analysis for the emergency cooling system. Assume: Electrical system failure=0.15/y, Ventilation system failure- 0.2/y, safety valve failure =0.3/y, initiating event based on material B How rate increase =0.25/y

Explanation / Answer

Evaluating and analyzing the risk in the mining industry is a new approach for improving the machinery performance. Reliability, safety, and maintenance management based on the risk analysis can enhance the overall availability and utilization of the mining technological systems.

This study investigates the failure occurrence probability of the crushing and mixing bed hall department at plant by using fault tree analysis (FTA) method.

The results of the analysis in 200 h operating interval show that the probability of failure occurrence for crushing, conveyor systems, crushing and mixing bed hall department is 73, 64, and 95 percent respectively and the conveyor belt subsystem found as the most probable system for failure.

Finally, maintenance as a method of control and prevent the occurrence of failure is proposed.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.