When the level gauge in the sedimentation tank of the thermal hydrocracking unit for gasoline processing was put into use, the liquid level in this unit fluctuated significantly
Thread Content
Due to the unsatisfactory performance of the level gauge in our hydrogenation unit, it is necessary to replace the level gauge for the hot high-boiling fraction. The hot high-pressure section (at 3.5 MPa) is equipped with two sump level gauges; when one of them was removed, replaced, and put back into use, the liquid level in the hot high-pressure section dropped by 4 percent. Why are the fluctuations in the hot fraction level so large? Could it be caused by improper operation? Is there any theoretical explanation?
The error isn’t too large. Was there any calibration of the change-making function after the replacement (on a non-professional level)? How did you address this issue going forward?
A 4% fluctuation is not considered significant; compare it with the liquid level gauge on site – as long as the difference is no more than 5, it’s fine, or decide based on your own regulations
It seems that the accuracy of your instruments is extremely high – 4% is already considered an abnormal value, while here changes of less than 20% hardly draw the attention of our management! 1. With a newly installed gauge, a small amount of error is normal ； 2. The cylinder-type level gauge operates on the principle of variable buoyancy; in addition to changes in liquid level, changes in the density of the medium also have a significant impact. An error of 4% for these two types of gauges is considered normal.
Do the two sinkers lead to another collection pipe?