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"Blower Fan" imported energy conservation principle guide vane adjustment. When the installation of the inlet guide vane angle θ1 = 0° by the increase of θ2 or θ3, the operating point to move from the M1 or M2 M3; flow decreased from Q1 to Q2 or Q3; shaft power reduced from P'1 to P'2 or P'3. Area shown by hatching for inlet guide vane than the throttle to save power. In this project, the depth of the aeration tank is fixed, the blower while maintaining the outlet pressure constant conditions, traffic regulation, namely H = constant, Q = variable, pipe network characteristic curve similar to the horizontal line, using the blower inlet guide leaf regulation, without resorting to changing the pipe network characteristic curve can be opened and closed by changing the angle of the vanes of the pressure fan - flow performance curve changes, changes in traffic through the operating point is moved to the new changes the characteristics of the fan curve on implementation.
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