Commissioning of vacuum tower
Thread Content
When starting up a vacuum tower, should vacuum be created first or material be fed in first? Currently, there are systems that allow material to be fed in first; by feeding material first and then creating vacuum, the impact of the feed on the vacuum level can be reduced. Most people support evacuating first; I don’t understand it
I’m here to support you; generally, materials are first fed in, then vacuum is applied, and finally the temperature is increased.
The startup process for a vacuum tower generally involves: 1. Evacuating the tower to reach the normal operating pressure, and then maintaining that pressure to conduct a leak test; 2. Heating or cooling the tower to bring it close to the operating temperature. 3. Add the raw materials to the tower. 4. Turn on the heat sources for the reboiler and various heaters, as well as the cold sources for the top condenser and various coolers. 5. Gradually adjust the operating conditions and parameters of the tower, so that its load and product quality can reach the normal operating values as quickly as possible, thereby enabling the tower to operate under normal conditions.
Depending on the properties of the material, if operation under negative pressure is required, vacuum must be created first. If negative pressure is only used to facilitate separation, then it doesn’t matter
From my own experience, if the tower is to operate under negative pressure, it is necessary to create a vacuum first. When the pressure is close to the operating level, material can be added slowly. Once the liquid level reaches the desired level, heating can be increased gradually