Typical axial flow paddles suitable for mixing, propagation, circulation, particle suspension, dissolution, etc. of low viscosity fluids
Advantages: low shear, strong circulation, low energy consumption
Disadvantages: When running, slender shafts need to be equipped with intermediate bearings or bottom bearings, the overall casting impeller, should not be used in large devices
Flow state: axial flow type, high circulation rate, low shear force. Use baffles or guide tubes for stronger axial circulation
Common medium viscosity range: <2000mpa.s
Common rotation speed: 100~500r/min
Leaf tip speed: 3~15m/s
Note: The maximum speed can reach 1750r/min. The maximum tip speed can reach 25m/s. Speed below 500r/min, suitable for medium viscosity up to 5x10mpa.s
Application example: A hydrogen storage tank with a diameter of 2900mm and a volume of 33m3 contains a 1% Raney nickel catalyst. The main purpose of stirring is to prevent precipitation of the catalyst in order to transport the hydrogenation liquid. Practice has proved that a 600mm diameter tri-blade propeller stirrer operates at 250r/min, fully meets the process requirements under full plate conditions, and the required motor power is only 3kw, but the stirring shaft needs intermediate bearing, easy Wear.
