全息干涉法对气液流动浓度边界层的实验观测

引言 早期的界面浓度分布观测多采用加入示踪剂的方法[1-4].但由于示踪剂的加入对传质会造成干扰,影响了测量的可靠性.     

浓度极稀物中回收微量重组分的精馏操作策略-准间歇精馏

A new operation policy-quasi-batch distillation for recovering infinitesimal amounts species existing in a mixture is presented. In quasi-batch distillation operation, feed is introduced with a constant flow rate onto the feed stage of the column, and the flow rate of the distillate is the same as that of the feed, whereas the bottom product is withdrawn periodically. The behavior of quasi-batch distillation is simulated and analyzed through an example on heavy water separation. Comparing with continuous or batch distillation, the new operation policy is more reliable and efficient to achieve higher recovery of dilute component. This is especially suitable for separating small amount of precious species from large amount of raw material.     

溶剂油分离流程模拟优化设计

溶剂油是石油化工重要产品,其生产基本由精馏分离序列完成,通过优化精馏序列内分离任务和操作参数可有效提高各类溶剂油产品收率,降低单位产品能耗。在流程模拟软件Aspen Plus中建立溶剂油分离模拟流程,利用DUSTWU简洁计算模型确定各个精馏塔的初值,之后使用RADFRAC严格计算模型,利用单因素变量法对主要精馏塔的工艺参数进行调整和优化。研究主要操作参数,如回流比、进料位置和采出量等对于精馏塔能耗的影响,最终得到最适宜的溶剂油分离流程。     

隔壁精馏塔节能应用研究

本文以分离三组分进料为例,对比考察各种类型隔壁塔的能耗,建立评估经济性模型,探索隔壁塔合适的应用工况。     

催化裂化吸收稳定系统模拟优化研究

在流程模拟软件Aspen Plus中建立改进的催化裂化吸收稳定系统模拟流程模型,利用传统催化裂化吸收稳定系统流程的工艺参数作为初值,通过规定主要产品标准,确立了现有工艺流程的初步操作参数。使用单因素变量法对现有流程工艺参数进行调整,研究流程内主要设备的操作条件,如补充吸收剂流量、稳定塔回流比、稳定塔理论板数、稳定塔顶液化石油气抽出量、解吸塔进料温度及再吸收塔贫吸收油温度等因素对于工艺流程综合性能的影响。     

浓度极稀物中回收微量重组分的精馏操作策略—准间歇精馏

A new operation policy--quasi-batch distillation for recovering infinitesimal amounts species existing in a mixture is presented. In quasi-batch distillation operation, feed is introduced with a constant flow rate onto the feed stage of the column, and the flow rate of the distillate is the same as that of the feed, whereas the bottom product is withdrawn periodically. The behavior of quasi-batch distillation is simulated and analyzed through an example on heavy water separation. Comparing with continuous or batch distillation, the new operation policy is more reliable and efficient to achieve higher recovery of dilute component. This is especially suitable for separating small amount of precious species from large amount of raw material.