What type of impeller should be used in a gas-liquid reaction vessel?
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Oxidizing a liquid using air catalysis; the catalyst is solid and insoluble in the liquid. The reaction takes place at normal pressure and temperatures of 80–100°C. The reaction rate is relatively slow. The reaction vessel is a standard one modified by adding a gas distributor at the bottom. What type of impeller should be used to increase the gas-liquid contact area?
A layer of disc turbines is usually installed on the gas distributor to increase the gas-liquid contact area
The container is equipped with baffles, along with a disc-shaped turbine stirrer having several blades
Refer to the loop reactor; it features high mass transfer efficiency and rapid reaction speed. For more details, visit www.hhcorp.com.cn
There are professional manufacturers that can provide this: I downloaded the instructions from Hangzhou Yuanzheng online; you can go to that website to take a look. You provide the parameters and requirements, and they will design it; it’s just that the price will be a bit higher. There are other manufacturers in the country; you can look for them on your own. Working principle of the self-priming mixer: When the motor drives the hollow self-priming mixer inside through a reducer, the fluid surrounding the mixer also moves in a circular motion under the action of the impeller. The centrifugal force generated creates a suction effect inside the mixer, resulting in a negative pressure area there. Since the interior of the mixer is connected to the gas phase via a hollow shaft, gas at the surface of the liquid is continuously drawn into the mixer and dispersed again within the liquid phase. The bottom mixer is designed for various mixing purposes; in catalytic hydrogenation reactions, it serves to disperse the freshly added hydrogen, suspend the catalyst, and facilitate macroscopic mixing of the liquid phase ； And when a self-priming mixer is used for submersed aeration in wastewater treatment, this mixer can be omitted ； In other different manufacturing processes, the form of this mixer may change. · Features of the self-priming mixer: It has the ability to self-primse with gas, ensures good dispersion of bubbles, can significantly increase the gas content and the contact area between the gas and liquid phases, thereby markedly accelerating the reaction rate for most gas-liquid reactions. · Application scope of self-priming mixers: The MZX type self-priming mixer is suitable for most gas-liquid mass transfer reaction processes such as catalytic hydrogenation, catalytic oxidation, fermentation, and submersed aeration. It can significantly increase the reaction rate, and its advantages are particularly evident in systems where reactions are difficult to occur. Typical applications include p-aminotoluene, m-aminotoluene, 3,3’-dichlorobenzidine (DCB), natural VE transformation, o-anisidine, ethyl p-aminobenzoate (benzocaine), EDB, aliphatic amines, isoproturon, procaine, and o-amino-p-toluenol.
How can safety be ensured? Safety imposes certain limits on the mixing speed.
For this reaction, air can be replaced with pure oxygen, using the loop reactor mentioned above. There’s no need to empty it. QQ595195205