烷基化废硫酸处理反应浮选塔进料分布器CFD模拟
|
摘要
新型烷基化废硫酸资源化处理工艺在反应浮选一体化设备内实现了反应过程与除油除杂质过程的耦合。本文应用计算流体力学(CFD)方法对关键设备反应浮选塔内的废硫酸分布器和氨气分布器内部流场进行预测和分析,模拟结果显示,废硫酸分布器结构和分布孔设计基本可以满足宏观全塔截面的流量均布,通过流场模拟,发现局部流量较大的区域,内件设计和操作过程中应强化此类区域的混合与换热;氨气分布器安装曝气头后,各分布支管的流量分布更均匀,分布孔最大流量与最小流量差异小于1%。以上CFD模拟结果为设备结构优化和稳定运行提供了指导意见和理论支撑。
The reaction and flotation are coupled in reactive flotation column for the process of recycling of alkylation waste sulfuric acid,in which ammonia reacts with waste sulfuric acid and alkylate is separated.The computational fluid dynamic(CFD)method was used to predict and analyse the fluid flow in the waste sulfuric acid distributor and ammonia distributor which were installed in the reactive flotation column.The simulation results showed that the structure of waste sulfuric acid distributor and the arrangement of distribution holes could satisfy uniform flow distribution on a macroscale.High flow rate regions were found,where mixing and heat exchange needed to be intensified.After fitting with aeration devices,the flow rate of every distribution tube on ammonia distributor was more uniform.The difference of flow rate for single distribution hole on ammonia distributor between maximum and minimum was less than 1%.The guideline and theoretical support for equipment optimization and steady run were proposed according to CFD simulation results.
The reaction and flotation are coupled in reactive flotation column for the process of recycling of alkylation waste sulfuric acid,in which ammonia reacts with waste sulfuric acid and alkylate is separated.The computational fluid dynamic(CFD)method was used to predict and analyse the fluid flow in the waste sulfuric acid distributor and ammonia distributor which were installed in the reactive flotation column.The simulation results showed that the structure of waste sulfuric acid distributor and the arrangement of distribution holes could satisfy uniform flow distribution on a macroscale.High flow rate regions were found,where mixing and heat exchange needed to be intensified.After fitting with aeration devices,the flow rate of every distribution tube on ammonia distributor was more uniform.The difference of flow rate for single distribution hole on ammonia distributor between maximum and minimum was less than 1%.The guideline and theoretical support for equipment optimization and steady run were proposed according to CFD simulation results.
引文
[1]李明伟,李涛,任保增.烷基化工艺及硫酸烷基化反应器研究进展[J].化工进展,2017,36(5):1573-1580.
[2]卜岩,郭蓉,侯娜.烷基化技术进展[J].当代化工,2012,41(1):69-72.
[3]刘春江,齐文哲,耿阳,等.废酸处理制硫酸铵的集成设备及其操作方法[P].CN104689769B,2017-11-14.
[4]巫春连,魏耀东,蔡连波,等.气液鼓泡床泡罩式气体分布器流场的CFD模拟[J].化工机械,2013,40(3):340-346.
[5]徐俊,秦新潮,李晓曼,等.流化床管式分布器内流场模拟和布气性能分析[J].化工学报,2010,61(9):2280-2286.
[6]张秀华,尹侠.环流反应器分布器孔径对流场影响的数值模拟[J].计算机与应用化学,2009,26(2):199-204.
[7]丰存礼,刘成,李永辉,等.双切环流气体分布器内流场FLU-ENT数值模拟[J].石油化工设备,2004,33(2):25-27.
[2]卜岩,郭蓉,侯娜.烷基化技术进展[J].当代化工,2012,41(1):69-72.
[3]刘春江,齐文哲,耿阳,等.废酸处理制硫酸铵的集成设备及其操作方法[P].CN104689769B,2017-11-14.
[4]巫春连,魏耀东,蔡连波,等.气液鼓泡床泡罩式气体分布器流场的CFD模拟[J].化工机械,2013,40(3):340-346.
[5]徐俊,秦新潮,李晓曼,等.流化床管式分布器内流场模拟和布气性能分析[J].化工学报,2010,61(9):2280-2286.
[6]张秀华,尹侠.环流反应器分布器孔径对流场影响的数值模拟[J].计算机与应用化学,2009,26(2):199-204.
[7]丰存礼,刘成,李永辉,等.双切环流气体分布器内流场FLU-ENT数值模拟[J].石油化工设备,2004,33(2):25-27.