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The manufacturer supplies wx****0 catalytic hydrogenation and dehydrogenation experimental device - self-priming mixer

brief introduction



Wx self-priming mixer is a new and efficient gas liquid solid three-phase vertical mixing device, which is suitable for the production and application of various chemical processes, such as catalytic hydrogenation, mixed acid nitration, methylation, fluorination, sulfonation, air oxidation, etc; Liquid phase hydrogenation technology has widely replaced the traditional reduction methods such as iron powder, alkali sulfide and hydrazine hydrate, reducing the discharge of three wastes by more than *0% and improving the product yield and quality; It is also widely used in the reduction of alkynes, aromatics and unsaturated compounds containing cyano, nitro, imino and carbonyl groups.



working principle



When Wx self-priming mixer operates at high speed, it can make a large amount of liquid circulate inside and outside the impeller. According to the venturi injection principle, the gas on the liquid surface is entrained by the high-speed liquid through the hollow mixing shaft and thrown out of the impeller. The gas in continuous operation is continuously sucked into the deep liquid phase and forms a uniform gas-liquid mixing system. Realize high-efficiency gas-liquid contact and strengthen gas-liquid mass transfer process.



1. the mixing shaft runs at a high speed, and the center of the self-priming impeller forms a negative pressure chamber. The impeller sucks the reaction gas above the liquid level from the suction port to the liquid through the hollow shaft, and uses high-speed rotation to spray the gas into the liquid,



2. the self-priming impeller rotates at a high speed. The liquid is sucked into the self-priming impeller rotating at a high speed through the upper and lower water inlets of the impeller, mixed with the incoming gas, and then everything is sprayed out; The innovation of this structure can significantly increase the suction capacity at the same diameter and speed; And it is beneficial to the reduction of bubble diameter;



3. the gas-liquid mixture is further sheared and broken by the rapid paddle of the aeration blade under the self-priming impeller to refine the bubble diameter;



4. the shape of the self-priming impeller is more flexible, and the octagonal turbine lace shape (four turbine culvert type, six blade turbine type, multi tube type, hollow blade type, polygon type, etc.) is adopted. Compared with the disk turbine design, the octagonal turbine lace shape structure design is conducive to gas dispersion, crushing, and gas-liquid dispersion in the case of highly viscous fluid;



5. use the large displacement circulation of the lower wide blade curved surface axial-flow propeller to firmly press the newly ejected gas at the bottom of the kettle, and lift the solid material of the catalyst at the bottom of the kettle to a completely suspended state;



Through the analysis and research experiments on the suction capacity, gas holdup, gas-liquid dispersion characteristics, power characteristics, gas-liquid mass transfer and other aspects of the self-priming agitator, Jifu company has obtained relevant important experimental data to help us better optimize the propeller design and improve the overall engineering application performance.



Performance characteristics



â–  larger inspiratory capacity per unit time;



â–  the gas-liquid two-phase distribution in the kettle is more uniform and the mixing effect is better;



â–  the bubble diameter is smaller, and the gas-liquid contact area per unit volume is greatly increased;



â–  compared with the traditional production process, it reduces the discharge of three wastes and is more environmentally friendly and energy-saving;



â–  compact and beautiful structure, without a large number of circulating auxiliary devices, low investment and simple operation;



â–  effectively save catalyst consumption and reduce production cost;



■ adapt to the wider process requirements, volume: *0l*****0l agitator, temperature: ****0 ℃, pressure: ***0mpa;



The viscosity of reaction materials increases, the dispersion of solid materials is difficult, the macro circulation demand increases, and the displacement of improved axial-flow propeller increases; The gas dispersion distance is greatly affected. Where the gas is distributed far away, it cannot be realized by a simple self-priming impeller. When the material has a certain viscosity, the bubbles generated after the inhaled gas enters the liquid phase will be large and not easy to break;



The new Wx self-priming impeller designed by our company solves



1. the mixing impeller is designed to achieve high linear speed, and the spindle speed is *******0 rpm; The gas content in the kettle is relatively high as a whole due to larger suction capacity;



2. the bubble diameter is smaller, and the unique structural design (gas explosion blade) can make the broken shear part of the inhaled gas close to atomization, which is easier to disperse and diffuse to every corner of the kettle;



3. the gas-liquid-solid three-phase contact area in unit volume increases, and the contact rate increases,



4. the lower axial-flow propeller combination is more flexible, and the corresponding propeller type is selected according to the different solid particles, viscosity and solid content of materials;



5. adapt to the mixing reaction of materials with a certain viscosity. Through the adjustment of the paddle structure, the gas-liquid-solid three-phase mixing reaction of highly viscous fluid is strong;