射流位置对碳化反应器混合效果影响的数值模拟分析  

Numerical simulation analysis of influence of jet position on mixing effect of carbonization reactor

作　　者：任腾[1] 李胜东 王德喜[1] 褚付州 邵立新 REN Teng;LI Shengdong;WANG Dexi;CHU Fuzhou;SHAO Lixin(Shenyang University Of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学,辽宁沈阳110870

出　　处：《无机盐工业》2023年第7期109-114,共6页Inorganic Chemicals Industry

基　　金：沈阳工业大学青年教师科研能力培育基金项目(070/200005822);辽宁省重点研发计划项目(2019JH2/10100011)。

摘　　要：为探究射流器结构参数对碳化反应器混合效果的影响,基于CFD(计算流体力学)数值模拟的方法,采用ANSYS模拟软件对比研究了制备碱式碳酸镁的新型射流碳化反应器不同射流位置对混合效果的影响规律。对室温下通入速度为2 m/s的二氧化碳气体及氢氧化镁浆料的射流反应器进行了二维瞬态模拟,并对不同射流位置下的二氧化碳和氢氧化镁浆料速度、浓度分布及反应器腔内流场分布情况进行了对比研究。模拟结果表明,射流在混合腔的速度最大,气液剧烈混合,物料由扩散腔射出后,在反应器内以低于20 m/s的速度均匀混合,在射流位置为1/2H至1/5H范围内,随着射流位置降低,速度亏损最小为1.2%,射流效果更稳定,浆料和气体混合更充分。此外,射流位置对于腔内浆料的浓度有明显影响,当射流位置为1/2H时,浆料和气体浓度比接近1∶1,物料混合效果较好。该模拟优化结果能够为碱式碳酸镁射流碳化反应器的优化设计提供理论依据。In order to explore the influence of jet structure parameters on the mixing effect of carbonization reactor,based on CFD(computational fluid dynamics)numerical simulation method,ANSYS simulation software was used to compare and study the influence law of a new type jet carbonization reactor for preparing basic magnesium carbonate at different jet positions in the reactor.A two-dimensional transient simulation was conducted on the jet reactor of CO_(2) and magnesium hydroxide slurry with a flow rate of 2 m/s at room temperature.The velocity and concentration distribution of CO_(2) and magnesium hydroxide slurry and the flow field distribution in the reactor cavity under different jet positions were compared.The simulation results showed that the jet velocity was the maximum in the mixing chamber,and the gas-liquid mixing was intense.After the material was shot out of the diffusion chamber,it was uniformly mixed in the reactor at a speed lower than 20 m/s.In the range of 1/2H to 1/5H of the jet position,the minimum velocity loss was 1.2% by dropping the jet position,the jet effect was more stable,and the slurry and gas were more fully mixed.In addition,the jet position had a significant impact on the slurry concentration in the cavity.When the jet position was 1/2H,the ratio of slurry and gas concentration was close to 1∶1,and the material mixing effect was better.The simulation optimization results could provide a theoretical basis for the optimal design of the basic magnesium carbonate jet carbonization reactor.

关 键 词：射流位置 碳化反应器 混合效果 数值模拟 

分 类 号：TQ051[化学工程]