Selection of level gauges for desulfurization towers and methanol storage tanks
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Are the magnetic flap valves (with transmitters) used in ammonia synthesis desulfurization towers, and the single-flange pressure transmitters used in methanol tanks (at atmospheric pressure), reliable and accurate? How is the actual application going for everyone?
If it is a very important process control point, it is best for the magnetic flip switch and the level transmitter to be independent of each other. After all, if they are integrated, if something goes wrong with the former, the latter will also be affected. It is also necessary to take into account factors such as temperature, medium cleanliness, and the impact of measurements during maintenance work. As for single-flange level transmitters, the factors that come into play are basically the usual ones such as temperature, material type, corrosivity of the medium, tendency to crystallize, and the possibility of negative pressure. For example, the vaporization point of high-temperature silicone oil is closely related to the level of vacuum. Specifically, you can look for a comparison curve; this aspect is often overlooked, and I have experienced it firsthand.
I think the medium in the ammonia synthesis desulfurization tower contains suspended solids, so a magnetic flap level gauge is not suitable for use； It is better to use a double-flange transmitter, along with a root valve ； A single-flange level gauge can be used for the methanol tank (at atmospheric pressure).