Longest continuous operating time of ion-exchange membrane caustic soda systems in various manufacturers
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This post was last edited by sunjl1981 on 2013-1-6 at 23:23. Ion membrane caustic soda production systems often come to a stop due to various interlocks, related to electrical issues, instrumentation problems, or process-related factors. As is well known, excessive shutdowns are detrimental to the lifespan of the membranes and electrodes; therefore, in order to extend their service life as much as possible, it is necessary to maintain continuous and stable operation. In foreign companies with high levels of operational efficiency in ion membrane caustic soda production, there are usually only 2-3 abnormal shutdowns per year, which is why these companies are able to achieve a membrane operating life of 8 years. I hope everyone will actively share their experiences, exchange successful practices, and improve their management skills. This post was last edited by wlntjs on 2008-1-11 08:39 ] # ， ， &
The longest operating period here was 210 days, from November 3, 2006, to June 12, 2007. During this period, all system parameters have remained stable, especially those of the cell system, with almost no change in cell voltage (aside from the influence of cell temperature). On June 12, harmonic issues caused the UPS used to power the instrumentation system to burn out, resulting in an emergency shutdown of the system.
Our factory is new, and due to the impact of the subsequent PVC plant, as well as that of the thermal power plant, electrical equipment, and instruments, our electrochemical cells have to be shut down approximately 4 times a year.
4 instances of abnormal parking isn’t that many; your operation management is quite good
In 2007, there were a total of 4 parking incidents, including 1 due to major repairs
In previous years, the vehicle was parked for a considerable number of days; the highest record was 126 days without being parked. Since this major repair, it has been in use for 65 days now. It seems we still need to improve our level further. :P
Personally, I feel that it is more difficult to operate continuously and stably in summer; in June and July 2007, we experienced 3 shutdowns due to harmonics, external power outages, and lightning strikes respectively.
It’s sunk; push it up by yourself. As the moderator said, it’s a great topic, and I hope everyone will participate actively
A normal and peaceful production is quite good. But after living in peace for too long, once it stops. I get flustered when dealing with problems~
Our plant started operation in 2005, with 33 shutdowns； In 06, 19 stops ； 21 times parked in 07. (including maintenance)
It’s been 3 years since it was installed; time to replace the membrane, right? There have been quite a few stops; has the membrane or electrodes been damaged?
Have there been any instances of system shutdowns caused by accidental operations? Hope to communicate
It’s great; I’ve finally found a kindred spirit! We started driving in early 2007, and there were 13 instances of shutdowns that year; 3 of those were due to issues with the device itself, while the rest were caused by problems with the thermoelectric systems, air compression stations, instruments, and related maintenance tasks.
I don’t entirely agree with the original poster’s view. Of course, frequent starting and stopping of the equipment does affect the lifespan of the ion exchange membrane, but I disagree with the claim that a membrane can last 8 years if it is stopped for only two or three times a year. The companies mentioned by the other posters have too many instances of equipment shutdowns, which indicates problems in their production management or planning. In China, electrolyzers that are shut down once a year for major repairs have a lifespan that is only half that of those used abroad (in terms of economic lifespan). There are many factors that affect the lifespan of ion exchange membranes, so let’s continue the discussion
I’m so envious of those people upstairs; we’ve been driving for just over three years now, and we’ve already stopped the car over 110 times. The problem is mostly related to electricity – in the past year, the power supply has been more stable, but now there are issues with the dashboard again
The system stopped operating three or four times over the course of a year, and each cell stopped working more than twenty times in that same period; the cause was mostly related to the electrodes and membranes. There are many reasons for power outages in the system.
The system stopped operating three or four times over the course of a year, and each cell stopped working more than twenty times in that same period; the cause was mostly related to the electrodes and membranes. There are many reasons for power outages in the system.
How can there be over 20 stops in a single-slot parking? Change the membrane?
On September 15, 2007, the plant was shut down for 4 hours due to a power outage in the external grid; on December 10, an accident in the evaporation system caused the transformer to trip, which in turn led to the automatic shutdown of the rectifier system. In total, the plant was shut down twice.
Since we started operations in August 2007, there have been over 10 shutdowns. Some of these were due to instability in the chlorine compressor, while others were caused by power outages. Overall, the operation has become relatively stable over time, and the number of unplanned shutdowns has **decreased**.