Self-suction type efficient stirring device

Abstract

The invention provides a self-suction type efficient stirring device. The self-suction type efficient stirring device consists of necessary stirring driving parts such as a speed reducing motor, a hollow stirring shaft, an upper auxiliary stirring paddle, a self-suction type stirring paddle and a lower auxiliary stirring paddle, wherein the self-suction type stirring paddle is a reducing pipe type stirrer; the transverse radius of a stirring pipe is gradually decreased outwards along the circumferential direction; the stirring pipe is of an all-directional porous structure; gas outlets are formed in an outlet and the back liquid level side of the stirring pipe; the upper auxiliary stirring paddle and the lower auxiliary stirring paddle are different types of axial flow type stirring paddles. The self-suction type efficient stirring device has the advantages that the gas suction critical rotation speed is low, the gas suction speed rate is high, the bubble size is small; gas is uniformly mixed with liquid and solid phases; the contact area between heterogeneous phases is large; mass transfer coefficients are high; a solid-phase medium can be effectively prevented from being settled; the reaction speed rate and the yield are increased.

Description

technical field [0001] The invention relates to a new self-priming stirring device, which is especially suitable for gas-liquid, gas-liquid-solid and other heterogeneous chemical reaction processes in chemical industry, biotechnology, pharmaceuticals, environmental protection and other industries, such as catalytic hydrogenation and biological fermentation , sewage treatment, etc. Background technique [0002] For gas-liquid, gas-liquid-solid and other heterogeneous chemical reaction processes with gas participation, traditional reactor types include packed tower / trickle bed reactor, bubble tower / airlift reactor, mechanically stirred reactor Wait. Among them, the gas utilization rate of the packed tower / trickle bed reactor is higher, but the pressure drop is small, the heat transfer performance is poor, the liquid phase residence time is not flexible, and it is not suitable for the working condition of the medium containing solids. Bubble tower or air-lift reactor has bett...

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Problems solved by technology

[0005] The main disadvantage of the existing self-priming agitator is that the disc-type paddle type is used, the stirring power consumption is large, and the critical speed of gas suction is high; the single self-priming paddle is used, the secondary dispersion process is weakened, and the bubble size Larger, and the overall medium mixing effect is relatively insufficient; when the stirring medium contains solid particles, the suspension effect is poor, and the solid particles are easy to deposit at the bottom of the reactor; the circulation air inlet is set on the hollow shaft, which weakens the rigidity of the hollow shaft and strength, there are certain safety hazards when running at high speed

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