Electrostatic precipitator failure
Thread Content
Recently, the secondary voltage in the third electric field of our plant’s electrostatic precipitator has been excessively high: it ranges from 80 to 90 KV (the design value is below 72 KV), and this value is on the rise. The secondary current is 13 MA, while the primary voltage is 300 V. Under normal circumstances, the secondary voltage and current should not rise significantly; then why is it so high in our factory?
What is flue gas electrostatic precipitator? Is it a 3-field series configuration? You can check the cathode rapping; if there is a malfunction with the cathode rapping, the possibility of corona closure is high.
Three electric fields in series； Acid production from pyrite ； The positive and negative polarity rapping is normal. If it’s corona closure or excessive dust accumulation as you said, it shouldn’t be sent to a high voltage level. Why is it actually too high?
I was wondering if there’s a possibility that some components have shifted? 》
Is a constant current source used for the electrostatic precipitator? If it is a constant current source, the reason for the voltage increase is easy to explain.
It uses a constant current source! The manufacturer is in Shanghai. This phenomenon has been going on for over a month now, and it still hasn’t been resolved. Today, the secondary voltage has risen to 95 kV, and the voltage gauge is fluctuating; we don’t even dare to supply power! Please give me some advice! This post was last edited by dnzjszjs on 2007-12-13 18:29.]
Can’t it be controlled manually? Have you tried it with no load?
It is recommended to check the electric field at an appropriate time; it is possible that the insulating porcelain shaft of the cathode vibrator has broken. This post was last edited by in the blink of an eye on 2007-12-14 08:25]
It was suspected, but the sound of the hammer hitting could be heard at the external shaking mechanism, and no broken fragments of the magnetic shaft were found at the ash extractor; therefore, it is unlikely that the insulating porcelain shaft of the cathode shaking mechanism has broken. However, the raw materials will run out in a couple of days, so there will be a chance to go to the site where the electric field is installed and take a look. This post was last edited by dnzjszjs on 2007-12-14 19:23]
I just looked up some information on constant current sources; it seems that the reason is an increase in the equivalent resistance within the electric field. U=I*R, so the secondary voltage also increases; it’s necessary to turn on the electric field for inspection. Thank you, Flash! !
I just looked up some information on constant current sources; it seems that the reason is an increase in the equivalent resistance within the electric field. U=I*R, so the secondary voltage also increases; it’s necessary to turn on the electric field for inspection. Thank you, Flash! !