Analysis of the reason for unchanged current when the fan adjusts its load
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Our company’s exhaust gas incineration system is equipped with a flue gas circulation fan whose rated air delivery capacity is 85,000 Nm3/h, while the normal operating flow rate is 6.5 Nm3/h. At present, only 8,000 Nm3/h of air is being used; the outlet damper is fully open, and yet increasing the inlet damper further does not result in an increase in either the air delivery capacity or the motor current. What could be the reason?
Are you using the inlet static vanes to adjust the air volume?
Is there any change by closing the inlet valve? Exclude faults in the inlet valve and instruments. PS: The rated air inflation volume is 85,000 Nm3/h, while the normal flow rate is 6.5 Nm3/h; currently only 8,000 Nm3/h of air is being used. What are the units and values?