【Weekly Topic 2017.2.27】What unplanned shutdowns have occurred in your plants?
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This post was last edited by LQ198619 on 2017-2-27 07:55 (Topic No. 8 of 2017). All forum members who participate in discussions will receive a reward of 10 wealth points. Topic: Have your installations experienced unplanned shutdowns? What is the reason for the shutdown? Weekly topic summary post for the “Petrochemical Technology Consultation Center”: http://bbs.hcbbs.com/thread-1669318-1-1.html. Petrochemical sector – an activity aimed at generating new ideas for energy savings: http://bbs.hcbbs.com/thread-1666758-1-1.html. Xiaomi phones are available for you to claim. Summary post for collecting chemical technology materials in the “Petroleum and Chemicals Section”: http://bbs.hcbbs.com/thread-1654603-1-1.html. Many prizes are waiting for you to win
Unplanned shutdowns were caused by multiple failures of the dry gas seal in the circulator of the hydroprocessing unit.
Unplanned shutdown caused by oil in the refrigerant compressor.
Unplanned shutdowns are mostly determined by market conditions
There have been unplanned shutdowns, mainly caused by equipment failures and issues with raw material supply; power outages and typhoons have also led to shutdowns.
Unplanned shutdowns are mainly emergency safety measures taken due to leaks or failures in some critical equipment. Furthermore, there are emergency shutdowns caused by the SIS interlocks of production equipment, including malfunctions; the probability of such shutdowns is higher than that resulting from equipment failures. There are also unplanned stops without halting. This phenomenon is quite common; there are numerous cases where devices that, based on past usage experience, should have been shut down for major repairs, continue to be operated despite the risks, owing to good market returns. Especially in the past two years, **after that shameless department set a floor price for refined oil products, spring has arrived for China’s petrochemical and refining industry – no, it’s more like summer has come; huge profits have pushed the entire industry into an era of extraordinary earnings. A small local refinery can easily earn 100 million or even several hundred million yuan in profit per year. This thrilled the owners of these petrochemical companies; they abandoned their plans to shut down for maintenance and increased production output. . . Although profits have been achieved, security risks know no bounds. I’m very scared; something serious could happen in such a situation. . .
The slurry system became blocked and non-functional; the settler coked up, blocking the feed leg
Inadequate safety measures lead to unsafe situations； There is also a shortage of funding ； Purchases are not made in a timely manner, and the materials are not available.
Coking occurred in the settler of the catalytic unit; the detached coke blocked the grid in front of the raw catalyst slide valve, resulting in poor catalyst circulation and a plant shutdown
The moving equipment is damaged and there are no backups, such as feed pumps, compressors, and air coolers. There are also heat exchangers; for example, the water cooler at the top of the tower (in the shell and tube configuration) has severe internal leaks. Power outages and voltage fluctuations prevent the equipment from starting properly. So far, no issues have been encountered with the static equipment