An experienced veteran from the coal chemical industry is here to address the issue of anthracene level measurement in the reaction vessels! ! ! !
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This post was last edited by Cuaji Yisu on 2018-4-10 at 11:10. The veterans should be familiar with this operating condition; I hope they can offer some guidance. The following information comes from Fan’s feedback on site: the reaction vessel is heated to around 250 degrees to remove anthracene. The differential pressure transmitters used on site do not provide accurate readings; there is negative pressure in the reaction vessel, and the medium turns into a liquid at 150 degrees. What type of level gauge would be most suitable to address this issue?
Double-flange level gauges, internal floating ball level gauges, and gas-interfering level gauges are all suitable.
Excessive negative pressure might make double flanges unsuitable; generally, normal negative pressure is fine. Pneumatic level gauges are becoming increasingly rare; they have poor practicality and tend to get clogged, so it is recommended not to consider them. An internal floating ball (float) can be considered, but it is not easy to maintain; an external float (with heating) or use of a heating medium for purging could be options. The choice of purging medium depends on the process conditions, and purging is primarily intended to prevent the torque rod section from coming into contact with a solidified medium.
Negative pressure and high-temperature conditions are quite suitable for float tanks. But be sure to prevent crystallization (solidification) inside the torsion tube. Based on the medium being measured and the process conditions, we have used superheated water, steam, naphtha, etc. for purging, and the results have been very good. Furthermore, the choice of measurement method takes into account not only the accuracy of measurement but also the convenience of maintenance. Long cycle life, maintenance-free operation, and a good cost-performance ratio are the ideal features.
“\"Veteran\"? Oh, the veterans – they’re basically all Red Guards. . . Red Guards, kick Chuan down and use him as a lesson for you. . . The Red Guards beating his father was fine; they tried to teach him how to measure liquid levels, but it really didn’t work. . :lol
Look, regarding this \"anthracene level measurement\", stop having unrealistic ideas. The liquid level is measured inside the tank, right? Think about it: anthracene removal relies on the sublimation effect of anthracene. When the furnace is stopped and feeding stops, and the temperature drops, the gaseous anthracene vapor will inevitably solidify, right? Things like diaphragms and conductive rods – are there any that aren’t afraid of solidification and deposit buildup? . So, performing disassembly and maintenance will not only exhaust you to the point of exhaustion, but it will also torment you terribly. If you don’t believe it, go ask your so-called “veterans” – they’re doomed by fate, unable to escape it; they’re nothing but a bunch of scumbags. :lol. . In my opinion, if one wants to minimize maintenance or make maintenance easier, then measuring the \"anthracene level\" by performing 1/N pressure division weighing from outside the tank might be the only viable solution. Refer to the diagram below; if the reaction vessel doesn’t have any support points, then some way needs to be found to create such support points. It’s a bit complicated, and understanding the schematic diagrams is crucial for grasping the principles involved, as they differ from the actual physical structure.
Bro, it seems you’re quite familiar with this technology. Would a guided-wave radar level gauge work? The current idea
Brother, I haven’t been to many factories; I don’t know much about chemical production processes. My brother’s job is to manufacture instruments and test meters. Bro, I consider the physical properties of the materials, as well as the operating conditions you mentioned, to figure out what problems the instrument’s measurements might face and whether there are any ways to overcome them. Radar maniac, an intermittent neurotic as well. With your current operating conditions, the broken radar can’t handle it. It’s 100% impossible to handle.
Considering the internal floating ball, guided wave radar is prone to material accumulation
In situations like this, with old manufacturing processes, it is necessary to improve the level of automation. The design institute recommended using over 30 high-temperature radars for level measurement. In my experience, radars work well in storage tanks under normal temperature and pressure conditions, but they are not suitable for use in reactors or other equipment where the operating conditions are complex. The current idea is to get a few units to try out, and also select other types of level gauges and test those as well, in order to determine which one works best.