Lower the constant bottom liquid level slightly backward, and the top temperature will rise immediately
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With a processing capacity of 700 t/h, 12 tons are sent to the vacuum furnace; as a result, the top pressure drops sharply. The problem is that my constant third-stage temperature is already just at the acceptable level – if more material is drawn off, it will rise even further
The thermal balance within the vacuum distillation column was not properly managed; otherwise, such a situation would not have occurred. If increasing the volume at the bottom of the atmospheric pressure column leads to an increase in the temperature at the top of the vacuum distillation column, then it is necessary to consider increasing the internal reflux in that column. This can be achieved by raising the flow rate of reflux in stage one or stage two of vacuum distillation (it depends on what is more appropriate given the actual conditions). Additionally, the amount of product sent out through the side stream on the vacuum side can be increased slightly, depending on the quality requirements of the product. The temperature of the vacuum distillation tower will not rise just because you increase the throughput; otherwise, how could you control the increase or decrease in production volume of your plant? The main reason is that the internal heat balance of the tower is not properly managed
Pull more shallow reduction side lines, and make more reflux. Maintain a good balance
The high dry point of the constant third line is likely due to an insufficient gasification rate, which results in too low a backflow rate under the constant third line.
The load reduction is at its limit; try increasing the temperature of the atmospheric pressure furnace