It’s still a fan problem!!!!
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When our company's fluidized bed is running normally, the blower rotates at full speed and the damper opening is about 60%. The air volume is controlled by an electronically controlled damper, and the control volume is relatively fast and accurate. However, the frequency converter attached to the blower has no effect. If we use the speed to adjust the air volume, the effect may not be as fast and accurate as using the damper. Do you have any good suggestions for air volume adjustment?
Using a frequency converter to adjust the air volume is more accurate than using a damper! In our company, the blower was changed from damper control to inverter control, and the effect is pretty good, but the damper still needs to be retained. Keeping the damper can achieve the purpose of ensuring wind pressure!
Frequency converter control is more convenient and economical.
We use a hydraulic coupling, which is easy to adjust!
Our electronic control is relatively primitive. The fan speed is adjusted with a knob, which is very inconvenient to operate.
Could you please explain why your inverter is not working? Is it because the inverter frequency did not drop after the damper was activated?
Frequency converter is more accurate； But it doesn’t have a damper that responds quickly
The speed controls the air pressure, and the damper controls the air volume. I don’t know if that’s correct.
When the rotational speed is constant, changing the damper opening will cause the wind pressure to change accordingly.
This post was last written by zjy_007 edited on 2009-9-2 20:02 I think frequency conversion is better, because the load change of the fluidized bed boiler is not very big. As long as the corresponding relationship between frequency conversion size and load is summarized, it is more economical to apply frequency conversion than to use damper adjustment.
8# xbxbzx There should be a problem. The number of revolutions has an impact on wind pressure and flow. When the number of revolutions of different models of machines changes, the flow pressure will change accordingly. , the damper has a good effect on regulating the flow rate, but is slightly less effective on regulating the flow rate.