The primary fan is equipped with variable frequency drive
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Is it necessary to install frequency converters on the motors of the primary fan, secondary fan, exhaust fan, etc., in circulating fluidized bed boilers? How did you make this decision? Thank you!
For our coal-fired furnace, frequency converters have been used for the primary fan, secondary fan, exhaust fan, and other motors, achieving good energy-saving results.
Considering the load, if it remains at full capacity for a long time, it may not be necessary to install it; however, it is essential to install it when the load is low for a prolonged period, as this leads to significant energy savings. It also allows for flexible load regulation, reduces the rotational speed, extends the lifespan of the fan bearings, and prolongs the interval between maintenance tasks.
I agree with what was said above – there’s no need to keep operating at full capacity for such a long time; the investment in so many variable frequency drives is also considerable
In our coal-fired boilers, the primary fan is equipped with a fluid coupling to regulate its speed
The previous workplace also used liquid couplings, and there was no problem with them; they worked well – all you had to do was adjust the opening of the control valve
The fan in a coal powder furnace serves a similar function to the secondary fan and exhaust fan in a fluidized bed; the primary fan in a fluidized bed has a somewhat special role.:)
Yes, it depends on the overall benefits: handshake
The key point is that the cost of frequency conversion isn’t something trivial at all :)
With changes in the load of a circulating fluidized bed, it is necessary to frequently adjust the primary and secondary air flows; it is advisable to use frequency converters for this purpose.