应用于脱硫废水处理的蒸发器模拟仿真
|
摘要
应用Fluent软件,对多效蒸发器中的一效蒸发器进行仿真模拟,依据设计出的蒸发器的基本结构和工程实际情况,合理简化其物理模型,建立蒸发器全流道双流模型,通过流固耦合分析,掌握蒸发器流场的流速情况和压力特性.仿真结果表明,换热器内部流动压力损失大,流动均匀性不合理,液体阻力表现明显;内部液体流动均匀性和一致性相对较差,外部气流的均匀性和一致性较好.实验验证与仿真模拟结果的误差在允许范围内,说明仿真模拟结果是可靠的.要改善蒸发器内部压力损失过大与流动不均匀问题,需对其内部结构进行合理优化.
The one effect evaporator in the multi effect evaporator was simulated using the FLUENT. According to the basic structure of the designed evaporator and the actual situation of the project,the physical model was simplified reasonably and the full flow channel double flow model of the evaporator was established. Through the fluid structure coupling analysis,the flow rate and pressure characteristics of the flow field of the evaporator were mastered. The simulation results showed that the internal flow pressure loss of heat exchanger was large,the flow uniformity was unreasonable,and the liquid resistance performance was obvious; the internal liquid flow uniformity and consistency were relatively poor,and the external air flow uniformity and consistency were good. The error between experimental verification and simulation results was within the allowable range,which showed that the simulation results were reliable. In order to improve the problem of excessive pressure loss and uneven flow in the evaporator,it is necessary to optimize its internal structure reasonably.
The one effect evaporator in the multi effect evaporator was simulated using the FLUENT. According to the basic structure of the designed evaporator and the actual situation of the project,the physical model was simplified reasonably and the full flow channel double flow model of the evaporator was established. Through the fluid structure coupling analysis,the flow rate and pressure characteristics of the flow field of the evaporator were mastered. The simulation results showed that the internal flow pressure loss of heat exchanger was large,the flow uniformity was unreasonable,and the liquid resistance performance was obvious; the internal liquid flow uniformity and consistency were relatively poor,and the external air flow uniformity and consistency were good. The error between experimental verification and simulation results was within the allowable range,which showed that the simulation results were reliable. In order to improve the problem of excessive pressure loss and uneven flow in the evaporator,it is necessary to optimize its internal structure reasonably.
引文
[1]杨发祥．浅谈电厂脱硫废水及其处理工艺[J]．中国高新技术企业，2010(4):105.
[2]孙晶．火电厂湿式烟气脱硫废水处理技术的试验研究[D]．保定:华北电力大学，2007.
[3]裴俊峰，吴伟，王凤茹．沁北电厂脱硫废水系统技术改造实例介绍[J]．华中电力，2011,24(1):49.
[4]祝业青，傅高健，顾兴俊．脱硫废水处理装置运行现状及优化建议[J]．江苏电机工程，2014,33(1):72.
[5] BARRINGTON D J,HO G. Towards zero liquid discharge:The use of water auditing to identify water conservation measures[J]. Journal of Cleaner Production,2014,66:571.
[6]祝斯．多效蒸发脱盐处理实验研究[D]．大连:大连理工大学，2012.
[7] LIANG L,HAN D,MA R,et al. Treatment of high-concentration wastewater using doubleeffect mechanical vapor recompression[J].Desalination,2013,314(4):139.
[8]宋小曼，杨丽，王伟洁．水平管降膜蒸发器管外液体流动数值模拟[J]．煤气与热力，2018,38(2):10.
[9]闫鸿志，胡斌，王如竹．水-水降膜蒸发器的模拟仿真和优化[J]．化工学报，2018,69(S2):68.
[2]孙晶．火电厂湿式烟气脱硫废水处理技术的试验研究[D]．保定:华北电力大学，2007.
[3]裴俊峰，吴伟，王凤茹．沁北电厂脱硫废水系统技术改造实例介绍[J]．华中电力，2011,24(1):49.
[4]祝业青，傅高健，顾兴俊．脱硫废水处理装置运行现状及优化建议[J]．江苏电机工程，2014,33(1):72.
[5] BARRINGTON D J,HO G. Towards zero liquid discharge:The use of water auditing to identify water conservation measures[J]. Journal of Cleaner Production,2014,66:571.
[6]祝斯．多效蒸发脱盐处理实验研究[D]．大连:大连理工大学，2012.
[7] LIANG L,HAN D,MA R,et al. Treatment of high-concentration wastewater using doubleeffect mechanical vapor recompression[J].Desalination,2013,314(4):139.
[8]宋小曼，杨丽，王伟洁．水平管降膜蒸发器管外液体流动数值模拟[J]．煤气与热力，2018,38(2):10.
[9]闫鸿志，胡斌，王如竹．水-水降膜蒸发器的模拟仿真和优化[J]．化工学报，2018,69(S2):68.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |