Reasons for the failure of the caisson
Thread Content
The level gauge in the float tank used to measure the cooling water inside the unit keeps the process cooling water tank full, thereby ensuring adequate cooling water for the pumps. After some time, the reading on the level gauge drops from 100% to around 70–80%, before rising back to 100% after another period of time. During the on-site inspection, after the caisson was vented, it returned to 0; the water discharged was not dirty, the heating system was working properly, but it was unable to return to 100 after the gauge was activated. I would like to ask the experts here to help analyze it
Level gauge output curve: This phenomenon has occurred for 3 consecutive days; the green curve in the graph
Take a look at what times these events occur and see if there is any pattern
The root valve that connects the level gauge to the equipment can be closed, and then it is necessary to observe for a while to see whether the level gauge shows a constant reading; if the reading still changes on its own, then there is a problem with the level gauge. (Note: Ensure proper insulation.)
Judging from the problems we’ve encountered recently, this is a heat tracing issue – the temperature is too high, causing the water to boil. If it’s steam tracing, just turn it off for now and check again later. Electric heat tracing reduces the temperature.
The caisson leaks, freezes over, or vaporizes – these are the main reasons
There must be an issue with the working environment of the caisson; check issues such as heat tracing in the vicinity