How to improve the recovery rate of crude benzene
Thread Content
During the operation of the benzene removal tower, it is sufficient to maintain the boiling range of crude benzene; the temperature at the top of the tower should be increased as much as possible in order to boost the yield of crude benzene； However, the high tower top temperature also leads to a deterioration in the quality of the circulating wash oil. I’ve recently learned that by reducing the top temperature, the recovery rate not only remains unchanged but actually increases. But how is the tower top temperature controlled
This is normal; during normal production, the temperature at the top of the tower should not be set too high. The principle behind this is actually quite simple, but many employees in companies do not understand this concept of operation
The backflow volume is constant and does not affect production; as long as all parameters are within normal ranges, the temperature at the top of the tower can be adjusted based on quality. There’s no need to worry about production issues, as the yield will not be very low.
Adjust the tower top temperature based on the crude benzene test results.
In daily production, the temperature at the top of the tower should be kept as low as possible. One should not simply raise this temperature in an attempt to increase output. If the output is low, the real cause of this issue should be identified; raising the temperature will cause all the light components in the washing oil to evaporate, which deteriorates the quality of the washing oil and reduces its effectiveness in benzene purification, thereby ultimately lowering the output of crude benzene and creating a vicious cycle.
This post was last edited by caocheng on 2019-4-30 09:27. The boiling range of crude benzene is determined by the temperature at the top of the tower, while the yield depends on washing and distillation； Excessively high tower top temperatures can lead to a deterioration in the quality of the washing oil, thereby affecting the washing efficiency.
Positive pressure benzene removal or negative pressure benzene removal?