The feed to the desolventizer tower increases, and the vacuum in the tower decreases
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The desolventizer tower is primarily used to remove most of the solvent from the material. Feed is introduced into the tower under flow control; the temperature at the bottom of the tower is 120°C. Butyl acetate, the solvent, is extracted from the top of the tower and recovered through cooling with circulating water and chilled water. The vacuum level is maintained at -0.093 to -0.095 MPa. During the first round of production, a feed rate of 5–6 m3/h had no effect on the vacuum level. Recently, a feed rate of 1–2 m3/h also does not affect the vacuum, but when the feed rate exceeds 4 m3/h, it affects the vacuum level, causing it to drop to around -0.089 MPa; however, the system’s pressure remains normal. Could you tell me what the reason is?
Is it possible that the seasoning has caused a blockage?
If the temperature at the bottom of the tower does not decrease, it is more likely that the two condensers at the top of the tower are not functioning properly – either there is not enough water for cooling, or the heat exchange efficiency of the heat exchangers is poor
Check the condensation effect, examine changes in the temperature and flow rate of the cooling water in the circulation system, and verify whether the heat exchanger is clogged.
Thank you. The pressure testing of the tower and the inspection of the pipeline for blockages showed no abnormalities; the cause is likely large fluctuations in feed volume and poor condensation efficiency
Thank you. The pressure testing of the tower and the inspection of the pipeline for blockages showed no abnormalities; the cause is likely large fluctuations in feed volume and poor condensation efficiency