微型气液固三相等温微分浆态床反应器的优化

Optimization of gas-liquid-solid three-phase isothermal differential slurry microreactor

针对气液固三相浆态床催化反应中,传递、反应、催化剂的原位表征均比较复杂的问题,为了有利于气、固相均匀分散于液相和反应温度在反应器中实现等温,通过对气液固三相反应工艺特性和反应器性能要求的分析,对微型气液固三相浆态床反应器进行了优化。根据微型浆态床对气液固三相反应分析的要求,采用图像法研究了分布器为G1、G2、G3,砂板直径为2、2.5、3cm反应器中的流体力学性能特征,考察了气体流速、温度、反应器直径及气体分布器对气含率、气泡尺寸、气泡上升速率以及气泡分布的影响,并进行流体动力学模拟计算,确定了微型浆态床反应器的直径为2cm,气体分布器为G3砂板的反应器结构,该反应器可以应用于反应过程中间态及液体产物生成过程的测试。

Based on the complexity of in-situ characterization of deliver,reaction and catalyst in catalytic reaction,which happened in gas-liquid-solid three-phase slurry reactor,it was optimized the gas-liquid- solid three-phase isothermal differential slurry microreactor for dispersing gas phase and solid phase present in liquid phase and uniform temperature distribution in the reactor,through the analysis of technological characteristics of gas-liquid-solid three-phase reaction and performance requirements for reactor.Considering the application of slurry microreactor to gas-liquid-solid three-phase reaction analysis, the flow dynamics characteristics in three distributors of G1,G2,G3core plate and in three reactors of 2 cm,2.5cm,3cm inner diameter were studied by using the image method.The influences of gas flow rate,temperature,diameter of reactor and gas distributor on the gas holdup,gas flow rate,distribution of bubble size were investigated.Through the fluid dynamics simulation,the diameter of slurry microreactor(2cm),the type of gas distributor(G3core plate)and so on was defined.Meanwhile,the gas-liquid-solid three-phase isothermal differential slurry microreactor which was applied to the in-situanalysis of chemical composition history in reaction process was developed.