During the distillation purification process, how can the operating condition of the distillation tower be determined by observing the liquid level in the sight glass?
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Recently, in practical operations, is it necessary to determine the operating condition of the distillation tower by observing the liquid layer in the sight glass? The sieve plate is a type equipped with an overflow weir; the tower pressure is 0.2 MPa. The liquid layer in the sight hole allows one to see from one end to the other, meaning the sight hole is essentially transparent. Is there any other way to determine this?
If there is liquid on the tray and some liquid splashes as well, with a stable gas-liquid mixture, then the operation is normal. If the liquid runs out, or if the gas-liquid interface is unstable, fluctuating up and down, with bubbles of varying sizes on the liquid surface that burst unevenly, then the operation is not normal