Nefaphenic anhydride Nefa tank level gauge
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This post was last edited by Wang Tianze on 2015-9-28 at 21:04. The radar level gauges used in the tanks at our factory sometimes get clogged with residue. I would appreciate it if those who have experience with phthalic anhydride could advise me on how to select appropriate level gauges for these tanks as well as on methods for fixing such issues. Thank you{:1_90:} @feng*aosa @Qiu Gege Baiza
This post was last edited by Xijiao on 2015-9-28 at 20:59. For phthalic anhydride, maleic anhydride, and viscous substances, if higher precision is not required, the back-blow method can be considered for level measurement. Feel free to discuss in detail; I have detailed materials available and can send them via email.
There isn’t a very good solution. Naphthalene, phthalic anhydride, maleic anhydride – radar monitoring is used for these; some tanks never need to have their contents removed, while others require cleaning on a frequent basis. It seems that the temperature of the tank is high, the material flow is steady, and materials generally don’t tend to accumulate in systems with nitrogen sealing. There is a large amount of material in the intermediate tank and buffer tank. Therefore, it is recommended to enhance the insulation and heating of the tank top in the process to prevent water ingress. At least improve the insulation and heat tracing around the installation point (within a radius of about 1 meter) to prevent rain. Do not stop the tank top heating arbitrarily. It can solve some problems. For radio frequency radars, the mounting flange neck can be raised slightly to bring the transmitting horn mouth roughly level with the inner wall of the tube; enhancing the heat tracing of the flange neck can help reduce material accumulation. But once the material is hung up, the amount that needs to be cleaned is also larger. For guided-wave radar, the mounting flange neck can be extended about ten centimeters into the tank; reinforcing the heating around this flange neck can help reduce material accumulation. I have tried blowing nitrogen inside from the flange neck, but it is necessary to ensure that the temperature of the nitrogen being blown in is higher than the temperature inside the tank; otherwise, it will only serve to lower the temperature and exacerbate the problem of material accumulation. I’m personally not optimistic, and I’m also worried that water might get in due to the manufacturing process.