Gas introduction method for reinforced gas-liquid mass transfer and device

Abstract

The invention provides a gas introduction method for reinforced gas-liquid mass transfer. The key technology comprises that: a gas with pressure enters a gas inlet pipe of a gas-liquid reactor and a gas distribution pocket at the tail end of the gas inlet pipe, and the gas is rubbed with negative ion powder coatings coated on the inner walls of the gas inlet pipe and the gas distribution pocket or a filler coated with a negative ion powder coating on the outer surface in the gas inlet pipe in the flowing process of the gas, so that the gas is excited and a large amount of negative ions are accumulated; and the gas rich in the negative ions is jetted from a gas nozzle of an integrated fluid ultrasound whistle led out from the gas inlet pipe or the gas distribution pocket, and the ultrasonic wave produced when the gas passes through the fluid ultrasound whistle enters the surrounding reaction liquid and drives the surrounding reaction liquid to jointly enter a circular mixing cylinder so as to finish gas dispersion of ultrasonic wave and negative ion double reinforced mass transfer, wherein the circular mixing cylinder is arranged in back of the nozzle, the inner and outer walls of the circular mixing cylinder are coated with negative ion powder coatings, and an ultrasonic transducer is arranged on the outer wall or in the cavity of the circular mixing cylinder.

Description

technical field [0001] The invention relates to a gas introduction method and device for enhancing gas-liquid mass transfer, especially suitable for gas-liquid reactors, and belongs to the technical field of gas-liquid mixing and mass transfer. Background technique [0002] In many gas-liquid reactions that use liquid as the continuous phase and gas as the dispersed phase, such as hydrogenation, chlorination, ammoniation, oxidation, aerobic biological fermentation, etc., most of them need to introduce a certain pressure of gas into the reactor. In the liquid, in order to achieve good gas-liquid mixing and mass transfer. At present, the commonly used method is to install various forms of gas distribution devices with the function of refining and discharging bubbles at the end of the inlet pipe that passes into the reaction liquid, such as multi-outlet nozzles, porous ring pipes, metal sintered meshes, and microporous membranes. And various forms of aeration heads, etc. Compa...

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Problems solved by technology

At present, the commonly used method is to install various forms of gas distribution devices with the function of refining and discharging bubbles at the end of the inlet pipe that passes into the reaction liquid, such as multi-outlet nozzles, porous ring pipes, sintered metal mesh, and microporous membranes. And various forms of aerators, etc. Compared with directly passing gas into the reaction liquid through the intake pipeline, the above-mentioned gas distribution devices can increase the specific surface area of ​​gas-liquid contact to a certain extent, and play a role in improving the gas-liquid mass transfer conditions. It has a certain promotion effect, but because of its working principle and the functions it realizes are only limited to the refinement of the discharged bubbles, and the phenomenon of bubble coalescence is serious after leaving the gas distribution device, it is difficult to transfer the gas-liquid mass transfer during the reaction process. The effect is improved to a more ideal level, and the gas utilization rate is greatly affected

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