Selection of crude benzene tank level gauge
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I would like to ask everyone what kind of level gauge would be suitable for measuring the liquid level in a cylindrical crude benzene tank with a diameter of 5 meters; the level gauge we are using currently, which is a single-element gauge, does not provide accurate readings
What’s the reason for the uncertainty? I think it’s most convenient to use a single-flange transmitter for this type of medium.
There is only one vent valve at the top with a diameter of 100; I’m not sure if a radar level gauge will work
In comparison, the single-flange type is more stable than radar
Consider whether the medium will crystallize, the temperature and pressure conditions in the tank, the height of the liquid level, and the position of the vent valve at the top. For media that tend to crystallize or contain impurities, a single-flange design is likely not suitable; it is recommended to use a DN100 flange, with a φ96mm horn antenna for measurement.
The plug-in dual-flange method provides accurate estimates; radar fluctuations are rather troublesome
Single flange, cost-effective and simple. It needs to be taken into account that benzene crystallizes at 6 degrees Celsius. In the north, heat tracing is also required. Some crude benzene contains chloride ions, which can corrode the diaphragm box. Moreover, benzene is a Group 1 carcinogen, and contact-based measurement inevitably leads to issues such as emissions and maintenance. If conditions permit, it is recommended to use a radar!
Since there’s a description of a breathing valve here, it’s certain that the pressure isn’t at absolute atmospheric pressure; there will be some slight pressure variations. Therefore, single-flange designs aren’t very accurate; try using a double-flange design instead
It is recommended to use a director’s radar; or if the liquid level remains stable and does not evaporate, you can try using a flared nozzle
There is a breathing valve, and the possibility of it becoming clogged cannot be ruled out; even if exhaust is not smooth, it can cause fluctuations. After all, the range of measurement is already limited. You could try using a double-flange design; radar should be able to perform measurements in this case. However, from a safety perspective, the safety department’s engineering team will not allow the use of a breathing valve in that location. You might be able to create an additional opening at an appropriate time