Determination of the level gauge installation location
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I’m seeking help from all the experts here. As shown in the diagram, the critical operation I need is to ensure that the liquid phase material in the evaporator/heat exchanger overflows the upper tube sheet, thereby preventing corrosion at the gas-liquid interface; at the same time, it is necessary to keep as little liquid phase material as possible inside the evaporation tank/separation tank. Now I need to install a level measurement device – I’m not sure whether using LT-101 + LT-103 would be appropriate, or if installing LT-102 directly would be better
Are you sure the setup at the scene was the same as well?
It seems that level gauges are mostly connected to the container itself; it’s the first time I’ve seen one connected to a pipeline!
Due to the influence of fluid flow direction, it seems that using differential pressure to measure the level with these three level gauges is not feasible; it is recommended to use radio frequency admittance or capacitive level gauges for measuring the level at 101, with the gauges being inserted from the bottom upward, taking temperature effects into account.
I get it now; just using LT-101 will do
If the liquid level measured at this section of the pipeline can represent the evaporator’s liquid level, then LT102 can be used; the high and low alarms correspond to the zero point of LT101 and the range of LT102
Level gauges are generally installed on containers
This design has flaws; you can take a look at the various factors affecting heat transfer efficiency! The material should flow in a cycle to exchange heat with the vapor, thereby improving heat transfer efficiency!
Keep LT101, and remove LT102 and LT103. To determine whether the fluid at the bottom of the heat exchanger is in contact with the upper tube sheet, a level switch can be installed below the upper tube sheet. This way, you can know whether there is liquid in the liquid separation tank as well as whether the liquid phase in the heat exchanger has spread throughout it. Using so many level gauges is impractical; their installation is also inconvenient. Moreover, the heat exchanger is clearly located across different floors, and it’s uncertain whether there is enough space in the infrastructure for installing level gauges. Additionally, it is not recommended to install level gauges on pipes, as there are many drawbacks to doing so. Also, is the liquid level flow of your evaporation tank directed to the heat exchanger? Looking at the structure, the tube side carries the material while the shell side carries steam. The material at the bottom of the heat exchanger will keep accumulating more and more. Could we consider adding a liquid separation reflux tank to create a circulation system that feeds material into the heat exchanger?