What precautions should be taken when operating a vacuum distillation tower?
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What precautions should be taken when operating a vacuum distillation tower?
1. The airtightness of the pressure tower must be very high to prevent oxygen from entering and mixing with the material inside the tower, which could lead to an explosion. 2. When shutting down the tower, the prime minister should lower the temperature at the bottom of the tower before stopping the vacuum pump; this prevents heavier components from the bottom of the tower from reaching the top of the tower when it is restarted. 3. The stability of the pressure at the top of the tower is a prerequisite for controlling other parameters.
1. Closely monitor the feed to prevent an excess of light components. 2. Pay close attention to the temperature distribution to prevent it from becoming too high, as vacuum is used to reduce the operating temperature and avoid phenomena such as decomposition, coking, or polymerization. 3. Monitor the vacuum pump system to ensure its proper operation. 4. Pay attention to the speed of air cooling at the top of the tower, the temperature difference of the cooling water, and the temperature of the chilled water. 5. If an oxygen meter is available, monitor the oxygen level (to detect any leaks).
1. Pay close attention to the pressures at the top of the vacuum distillation column, in the reflux tank, and at the bottom of the column; pressure is the basis for stable operation. 2. Monitor the temperature changes at the top and bottom of the column, as temperature is essential for ensuring effective separation. 3. Keep an eye on the liquid levels in the column and the reflux tank, as these levels provide the most accurate indication of the operating conditions. 4. Generally, a decrease in the vacuum level of the column, along with a drop in the temperature at the top of the column, will lead to a decrease in the column’s liquid level, provided all other conditions remain unchanged; the reverse is also true.