Mechanism Study And Development Of Solid Phase Deposition Reactor

The low-temperature sintering process of XY₂ pellets requires the XY₂ powder to be pre-oxidation treated.The existing gas-solid reaction equipment in the chemical industry cannot meet the requirements of the pre-oxidation process for a stable and uniform reaction.In this study,a new parallel plate solid-phase deposition reactor is put forward aiming at the lack of pre-oxidation reactor,and related mechanisms are studied,The structure of the reactor was firstly designed and demonstrated.The strength of reactor shell and flange were checked according to related standards and specifications.Then the flow field of the reactor was numerical studied and optimized based on computational fluid dynamics（CFD）.Basic structure parameters of the baffle was determined through orthogonal experiment and distances between baffle plates were optimized through response surface methodology（RSM）,with comprehensive score of flow field as the response value.Fitting effect of different models were compared.The model of comprehensive score and the optimum baffle structure parameters were obtained.The result indicates that Cubic RSM fits the result of CFD quiet well.The uniformity of flow field is significantly improved through optimal design and gas is uniformly distributed among the reaction channels.Installing of baffle can promote the comprehensive score to 13.460,which is 271%higher than flow field without baffle.The RSM optimization further promotes the comprehensive score to18.574,which is 38%higher than the"worst"case among CFD simulations.Making use of numerical simulation method to investigate the influence of factors of clamped plate structure on its dynamic response during rapping was implemented.The plate group was than optimized reasonably based on the result.The results show that,the equivalent stress of lateral-clamped plate（LCP）structure is positively correlated with rapping force and stiffness coefficient of springs,and negatively correlated with width and thickness of the clamps.The shedding rate on the surface of LCP structure is positively correlated with rapping force and negatively correlated with other factors.LCP structure show higher structural strength and shedding rate than corner-clamped plate（CCP）structure.The stress of optimized plate group during rapping meets the strength requirement and the shedding rate reaches 100%.Design check and numerical simulation studies show that the new parallel-plate solid-phase deposition reactor meets the requirements of uniformity and product collecting well,providing equipment basis for research and industrial application of pre-oxidation process and low-temperature sintering of pellets.