Cyclohexane Oxidation Reactor Mixing Technology Research

Cyclohexanone, caprolactam production of raw materials, along with the development and structural adjustment of caprolactam (CPL) and the expansion of industrial applications in the field of non-amide, cyclohexanone industry as an independent industry gradually formed.This paper briefly describes the current status of cyclohexanone production technology, progress, prospects and new process for preparing cyclohexanone. Cold mold experiment and CFD simulation for analysis and discussion for the high-pressure device Baling Branch cyclohexane oxidation process of transformation problems, cyclohexane oxidation reactor to carry out calculations to find out to improve the new mass and heat transfer paddle, applied to the cyclohexane sealed reactor and to achieve localization of the mixer. The main research results are as follows:(1) By cyclohexane oxidation reactor cold model experimental study on various combinations to optimize the analysis paddle, paddle selection found on the bottom of the gas-liquid dispersion meet production needs play a decisive role, combined with the actual operation of the device The factors should adopt new paddle paddle as a semi-oval tube turbine and the upper end of the paddle paddle paddle using a combination of broad-leaved wing paddle.(2) To be selected to optimize the combination paddle CFD simulation and analysis of fluid flow stirred reactor found no dead inside, gas-liquid dispersion sufficiently demonstrated theoretically optimal combination of paddle used is reliable.(3) The cause of the original imported machinery seal failure were studied under stirring meet production requirements to ensure that the case, the mechanical seal to achieve localization transformation.(4) Cyclohexane oxidation reactor mixing technology utilization, the oxidation reaction liquid acid ester+content decreased from1.0～1.8%to0.6%～0.9%, cyclohexane oxidation daily output from the original high-pressure device210to235tons up to260～270tons, the consumption amount of cyclohexane cyclohexanone original1120～1130kg/1has fallen to1110kg/tor less.