放射性Na~(131)I液体药品自动灌装装置的研制

研制了一种医用放射性Na131I液体药品自动灌装装置,该装置安装于洁净度为百级的防辐射屏蔽工作箱中,可执行放射性液体精确、连续自动灌装和自动上胶盖操作。该装置实现了强辐射环境下放射性液体药品的批量化分装,提高了放射性液体药品自动化生产水平,能更好地满足放射性药品生产的GMP规范要求。     

ChemCAD模拟分离混合二元酸二甲酯研究

采用ChemCAD软件对混合二元酸二甲酯的精馏分离过程进行模拟。首先选用简捷精馏模型分别对己二酸二甲酯和戊二酸二甲酯混合物,戊二酸二甲酯和丁二酸二甲酯混合物进行初步分离模拟,再选用联立矫正精馏模型进行两步间歇精馏模拟,得到合适的精馏条件。结果表明:精馏塔Ⅰ和精馏塔Ⅱ的塔板数均为22,塔顶压力为0.01 MPa,塔压降为0.001 MPa,再沸器温度小于423 K,进料口在塔板数12处,精馏塔Ⅰ最小回流比为2.42,精馏塔Ⅱ最小回流比为0.69时,进行模拟精馏,得到丁二酸二甲酯的纯度为99.60%,戊二酸二甲酯的纯度为99.61%,己二酸二甲酯的纯度为99.70%;根据模拟结果,采用精馏装置对混合二元酸二甲酯进行实验验证,实验结果与模拟结果相近。     

一种基于状态估计的间歇过程模型实时更新预测控制策略简

Nonlinear model predictive control （NMPC） is an appealing control technique for improving the per- formance of batch processes, but its implementation in industry is not always possible due to its heavy on-line computation. To facilitate the implementation of NMPC in batch processes, we propose a real-time updated model predictive control method based on state estimation. The method includes two strategies： a multiple model building strategy and a real-time model updated strategy. The multiple model building strategy is to produce a series of sim- plified models to reduce the on-line computational complexity of NMPC. The real-time model updated strategy is to update the simplified models to keep the accuracy of the models describing dynamic process behavior. The method is validated with a typical batch reactor. Simulation studies show that the new method is efficient and robust with respect to model mismatch and changes in process parameters.     

Moving horizon approach of integrating scheduling and control for sequential batch processes

Online integration of scheduling and control is crucial to cope with process uncertainties. We propose a new online integrated method for sequential batch processes, where the integrated problem is solved to determine controller references rather than process inputs. Under a two‐level feedback loop structure, the integrated problem is solved in a frequency lower than that of the control loops. To achieve the goal of computational efficiency and rescheduling stability, a moving horizon approach is developed. A reduced integrated problem in a resolving horizon is formulated, which can be solved efficiently online. Solving the reduced problem only changes a small part of the initial solution, guaranteeing rescheduling stability. The integrated method is demonstrated in a simulated case study. Under uncertainties of the control system disruption and the processing unit breakdown, the integrated method prevents a large loss in the production profit compared with the simple shifted rescheduling solution. © 2014 American Institute of Chemical Engineers AIChE J, 60: 1654–1671, 2014     

连续镀锌线试验设备加工的含钒DP980钢组织与性能

利用连续镀锌模拟设备,研究了微合金化元素Nb、V和V-N加入到低碳高强(980级)双相钢后组织与性能的变化。在基本成分基础上,设计了不同含量的V或Nb、采用高N或正常N含量的钢,经过不同的热浸镀锌(GI)、合金化镀锌(GA)和超快冷处理。此外,还利用石英管炉对模拟镀锌后的钢板进行热处理。结果表明,马氏体—贝氏体—铁素体各相比例受到不同微合金化元素加入量的强烈影响,但是各相强度影响较小。在小于0.1%C~1.75%Mn钢中实测抗拉强度达到1 100 MPa、同时具有良好的塑性和加工硬化性能。     

卧式厚板连续热镀锌退火炉生产线设计

介绍了某厚板连续热镀锌退火炉生产线的设计特点,并对无氧化加热炉NOF(Non-Oxygen Furnace)段作了重点论述。结合无氧化加热炉在生产过程中对气氛、温度要求的特殊性,详细阐述了该段气氛及温度合理控制的方法。     

批量Forward头文件自动生成

在用Forward测井解释平台处理井的时候,针对大量不同形式的测井数据形式转化为Forward测井解释平台所识别的数据格式过程中的繁琐性和机械程序可控性,利用Excel自带的VBA编译平台编写出自动添加Forward头文件的宏文件。对比手工添加Forward头文件,该宏的运行大大的缩短操作时间,减少了人为错误,处理结果准确整齐可靠。     

档案资料管理系统

阐述了《档案资料管理系统》开发的意义、作用以及主要模块实现的功能。     

母粒注射法生产三叶形黑色涤纶FDY

介绍采用纺前注射着色的方法,生产三叶形黑色涤纶FDY的生产工艺。讨论了PET切片、色母粒干燥条件、加入方式和加入量、纺丝温度、熔体压力和过滤条件的选择、冷却成形条件及卷绕工艺的制定和控制,并提出了防止色差的几点建议。     

降低锌耗的钢丝热镀锌优化工艺

采用电解脱脂,复合酸洗除锈,非离子活性剂的助镀剂配方,无锌渣内加热熔锌和电磁抹拭等工艺,降低了生产过程中锌损耗(5%~7%),节约了能源,提高了钢丝镀层质量。