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Immersed rotating filling bed reactor and application

A technology of rotating packed bed and reactor, applied in the field of reactors, can solve the problems of limited effect and cumbersome process of adding the third phase solvent, and achieve the effects of high internal air pressure, saving shaft power, and good dispersion uniformity

Active Publication Date: 2021-10-08
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The removal of the heat released during the reaction is the key to keeping the temperature in the reactor within an appropriate range. There are two options for heat exchange in the rotating packed bed: external circulation of liquid heat exchange and addition of a third-phase solvent for heat exchange, and external circulation for heat exchange. The heat requires constant external circulation, and the process of adding the third phase solvent is cumbersome and the effect is limited

Method used

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  • Immersed rotating filling bed reactor and application
  • Immersed rotating filling bed reactor and application

Examples

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Effect test

Embodiment 1

[0054] The submerged rotary packed bed reactor of the present invention is used to carry out the reaction of p-nitrophenol in ozone degradation water, and the gaseous ozone concentration is 20 mg L -1 , from the feed port, through the inner pipe of the feed assembly to the filler, the concentration of p-nitrophenol in the solution in the reactor is 100mg·L -1 , the rotation speed of the rotating packed bed is 500r / min~6000r / min, after full reaction, the removal rate of p-nitrophenol can reach about 95%, the mass transfer of ozone is enhanced, and the amount of dissolved ozone is increased.

Embodiment 2

[0056] The submerged rotary packed bed reactor of the present invention is used to carry out the reaction of acid red B in ozonated water, and the catalyst iron-cobalt double metal oxide is attached to the surface of the porous packing by chemical means. Put the solution into the reactor, turn on the cooling medium pump and the motor switch, and then inject ozone after the cycle is stable, and the rotation speed is 500r / min~6000r / min. The results showed that with the increase of the rotational speed, the removal rate of acid red B increased, and the removal rate increased significantly in the early stage of the increase of the rotational speed, but not in the later period. Under the optimal operating conditions, the removal rate of acid red B can reach about 98%, and the utilization rate of ozone is about 96%.

Embodiment 3

[0058] The liquid-liquid heterogeneous phase reaction of fatty acid methyl ester epoxidation is carried out by adopting the submerged rotating packed bed reactor of the present invention, using hydrogen peroxide as the oxygen source and formic acid as the oxygen carrier, the mass fraction of hydrogen peroxide used is 50%, and the mass fraction of formic acid The fraction is 86%, the molar ratio of double bond concentration to hydrogen peroxide concentration is 1:1.5, the molar ratio of double bond concentration to formic acid concentration is 1:0.23, the reaction temperature is 70°C, the volume fraction of the aqueous phase is about 0.3, and the rotating packed bed The rotating speed is 500r / min~6000r / min, and the epoxy value and iodine value of the obtained epoxy fatty acid methyl ester are 6 and 1.9 respectively.

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Abstract

The invention discloses an immersed rotating filling bed reactor and application. The immersed rotating filling bed reactor is characterized in that a rotor filler is immersed in materials in the reactor, the materials in the reactor form circulation under the driving of rotation of a rotor, the materials are fully sheared and dispersed into fluid infinitesimal elements when passing through the filler, the mass transfer rate and the reaction rate are enhanced, a feeding assembly enables different-phase materials to be led to the inner edge of the rotor at the same time, a blocking ring and a baffle play a vortex breaking role, and a heat exchange assembly can keep the system within a proper temperature range. According to the invention, the immersed rotating filling bed reactor is suitable for gas-liquid, liquid-liquid and other heterogeneous systems, and compared with a traditional rotating filling bed, the material contact time is long, and the reaction is more sufficient.

Description

technical field [0001] The invention relates to the technical field of reactors, in particular to a submerged rotating packed bed reactor and its application. Background technique [0002] Heterogeneous reactions include gas-liquid reactions, gas-liquid-solid reactions, and immiscible two-liquid phase reactions, etc. The diffusion of reactants to the phase interface and the area of ​​the phase interface directly affect the mass transfer and reaction rate of different phases. Process intensification has a significant effect on heterogeneous reactions. The shear force can fully mix and disperse different phases. The scale of the dispersion unit directly affects the size of the interface area and the reaction rate. [0003] The rotating packed bed is a typical process intensification equipment, which can shear the liquid phase at high speed to form droplets, liquid films, and liquid filaments with large specific surface area and fast renewal, greatly enhancing mass transfer and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/08C02F1/78C02F101/30C02F101/34C02F101/38
CPCB01J8/08C02F1/78C02F1/725C02F2101/38C02F2101/345C02F2101/308B01J8/087B01J8/10B01J2208/00132B01J2208/00867
Inventor 陈建峰初广文张亮亮孙宝昌邹海魁罗勇
Owner BEIJING UNIV OF CHEM TECH
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