The flow rate in the industrial naphthalene distillation column is decreasing slowly
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Currently, in the industrial naphthalene distillation system, the circulation flow rate of the distillation tower is slowly decreasing from 120 to 80. The pipes should not be blocked; the circulation pump is operating normally, and the temperature at the furnace outlet is around 320. Experts in the chemical industry, could you help analyze what the possible options are?
The description is too vague; it’s either a process issue or an instrument issue – those are the only two possibilities
The process involves feeding the unwashed triple mixture directly into the primary tower, using a single furnace with two towers. Instrument issues can be ruled out. Previously, the circulation flow rate in the distillation tower was around 110, and production was relatively stable. It was only in the past month that a gradual decline in traffic began to occur. I just want to ask the experts to talk about roughly how many possibilities there are. I’ll rule them out one by one, thank you
No change in tower feed temperature or tower pressure
No change; the tray type has been changed from the original floating valve tray to a bubble cap tray
Is there a flowchart or a PID diagram? Please post it for me to take a look
Recovery tower circulation flow rate? According to you, is it the double-column distillation of industrial naphthalene in the coal chemical industry? It is recommended to provide a flowchart