**What is the typical vacuum level set for the vacuum tower of this device, in KPA?
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The vacuum level in the light tower of my unit was set at –58 KPA during the process design; it was later adjusted to –55 KPA. These values were provided by foreigners, and indeed the losses at the top of the tower have decreased. Could any colleagues familiar with this process offer some suggestions regarding adjusting the vacuum level?
This probably varies from person to person; the amount of feed has a significant impact on the temperature at the top of the reactor. For Tianke’s 10,000-ton unit in Neijiang, it is -55, while for our 60,000-ton unit, it is -70
My 60,000 tons are at -40 kPa
Generally, 50 KPaA is sufficient for the design