Vibration of the backwash filter during backwashing
Thread Content
The backwash filter in my hydrogenation unit vibrates violently during backwashing, and it also makes a lot of noise. Have any of you forum members had such experiences? How did you resolve them? This post was last edited by Revolution on 2008-2-29 16:56.]
We are the same； During backwashing, an instantaneous pressure release occurs, resulting in a blasting effect; the impurities adhering to the filter screen are removed as a result of this sudden pressure change and end up in the waste oil tank. This is a requirement for ensuring effective backwashing of the filter. We didn’t pay it any special attention.
It must be dealt with; otherwise, it will cause the filter to fail. Our approach is as follows: 1. Reduce the opening degree of the valve through which the backwash oil enters the sludge tank, thereby slowing down the backwash flow rate. This process needs to be tried repeatedly, with the valve being adjusted further closed while still ensuring an effective backwash effect. 2. Strengthen the pipelines that carry backwash oil to the sludge tank, especially at the bends, in order to reduce vibrations and prevent leaks at the valve flanges. This post was last edited by microchen on 2008-2-29 20:48.]
I have asked many manufacturers, and in most cases there is no vibration. When closing the inlet valve, it is also necessary to take into account the increase in pressure difference; when the valve is open to a small degree, an increase in pressure difference results in limited flow, which fails to meet the production requirements ； A large opening doesn’t achieve much effect. Also, the vibration of the pipeline isn’t that severe; it’s mainly the programmable valves on it that are prone to damage from vibration. I believe the main reason is the high inlet pressure, which causes a sudden decrease in flow rate when backwashing stops; it’s not due to an explosion as mentioned on the second floor.
The backwash filter in my distillation unit vibrates violently during backwashing, and it also makes a lot of noise. Have any of you forum members had such experiences? How did you resolve them?
The vibration and noise generated by backwash filters vary depending on the design of the device and the structure of the filter mesh. The filtration media used in crude oil hydrogenation and hydroprocessing are different, with mesh structures that differ from wedge-shaped structures; some filters use vibration-based methods while others employ differential pressure methods. The noise can originate from pneumatic ball valves or from the filter itself. It’s normal.
It might be due to too much pressure~ a large pressure difference