What are the reasons for the high pressure difference in the dimethyl ether distillation tower?
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What are the reasons for the high pressure difference in the dimethyl ether distillation tower? One year after a new catalyst was installed in a 100,000-ton dimethyl ether plant, high pressure differences were observed in the distillation tower. It returned to normal after being boiled in hot water, but the pressure difference increased again after a month.
Generally, the increase in pressure difference is due to the following reasons: 1. Plate blockage； 2. Tray failure, floating valve jammed ； 3. Liquid flooding ； 4. Excessive feed rate and return flow rate ； 5. Excessive steam volume.
After distillation in the tower, the pressure difference is normal. Water, wax, and oily substances are removed during cooking.
The points mentioned represent normal variations in pressure difference, but these can generally be avoided through adjustments to operating conditions during normal operation! There is a greater possibility that impurities mixed in the distillation feed could clog the differential pressure gauge, leading to inaccurate pressure measurements, especially waxy substances! Try replacing the pressure gauge contacts!