有毒介质泄漏扩散模型在尿素装置安全评价中的应用

总结归纳了有毒介质泄漏扩散过程特点及泄露量计算的模型。以乌鲁木齐石化尿素生产装置为例进行有毒介质泄露扩散分析,在此基础上运用计算机模拟软件,模拟有毒介质扩散的过程,给出了定量化的评价结果。依据此例,将有毒介质泄露扩散模型引入安全评价的体系中,丰富了安全评价的体系内容,增加了安全评价定量化评价的方式。     

Low-Cost,High-Speed Domain Refinement without Damage to Insulative Coatings

Rolling large- diameter hardened steel balls over the surface of high- permeability grain- oriented electri-cal steel allows lines of plastic deformation to be laid down. Choice of proper Young’s modulus and ball diameter enables artificial grain boundaries to be created, producing appropriate domain refinement and loss reduction.     

化工原理课程设计配套教材

本文介绍了化工原理的课程设计教材——《常用化工单元设备的设计》（新版）的内容编排,阐述了该教材的原版和新版的主要特点。     

Cost analysis of seawater desalination with reverse osmosis in Turkey

Economically usable water resources per capita are decreasing due to excessive population increase each year in Turkey. For this reason, new water resources should be found in the near future. The potential water resources are seawater or well water both of which need removal of salinity. The most promising treatment method for salinity is reverse osmosis. While reverse osmosis becomes widespread, the cost of the process will decrease. There is no detailed information about cost of seawater desalination in Turkey. In this study, a cost analysis of seawater desalination in Turkey was performed for reverse osmosis systems. The basic parameters of cost analysis such as capacity, recovery, membrane life, energy, chemical costs and flux were evaluated based on the effects on capital, operating and total production costs.     

Visualization study on the dynamic mixing quality during single-screw extrusion

An empirical method was developed to study the dynamic mixing characteristics of a single-screw extrusion process. The method basically involved a modified version of the visible extruder developed by Wong et al. (Plast Rubb Comp Proc Appl 26:78, 1997). Digitized films of the molten polymer web emerging from the slit flow cells attached to the “windows” of the visible extruder’s barrel were captured in bitmap file format. Subsequent statistical analysis (largely variance) on the pixel intensity of the cropped films had made quantification of mixing quality possible. The higher the average variance of the pixel intensity, the poorer the mixing quality. The focus of this investigation was on the effects of temperature and screw speed. For the selected single-flighted conventional screw, it was found that, in general, the higher the screw speed, the shorter the residence time and, hence, poorer mixing quality. High screw speed also generated erratic average variance data. The results suggested that a critical screw speed for optimized mixing might have been present. For the equipment used in the current project, this critical screw speed lied between 50 and 80 rpm. However, unlike screw speed, melt temperature alone appeared to have relatively little effect on the mixing quality during extrusion.     

Jet breakup and droplet formation in near-critical regime of carbon dioxide-dichloromethane system

The jet breakup and droplet formation mechanism of a liquid in the near-critical conditions of a solvent-antisolvent system is examined with high-speed visualization experiments and simulated using a front tracking/finite volume method. The size of droplets formed under varying system pressure at various jet breakup regimes is measured with a Global Sizing Velocimetry, using the shadow sizing method. A stainless steel nozzle with 0.25 mm I.D and 1.6 mm O.D was used in this study. Experiments were performed at fixed temperature of 35 °C and system pressure in the range from 61 to 76 bar in the near-critical regime of the DCM-CO₂. At the near mixture critical regime for DCM-CO₂ mixture, the miscibility between the two fluid phases increases and the interfacial tension diminishes. This phase behavior has important applications in particle formation using gas antisolvent (GAS) and supercritical antisolvent (SAS) processes. The jet breakup and droplet formation in the near-critical regime is strongly dependent on the changes in interface tension and velocity of the liquid phase. An understanding of the droplet formation and jet breakup behavior of DCM-CO₂ in this regime is useful in experimental design for particle fabrication using SAS method.     

长岭气田登娄库组成岩作用特征及次生孔隙发育研究

长岭气田位于松辽盆地南部,登娄库组砂岩储层是其主要含气层位。储层的埋深大,成岩作用强,对孔隙发育及孔隙结构影响显著,次生孔隙的发育是登娄库组储层天然气聚集的主要控制因素。研究主要利用薄片鉴定等分析化验数据对登娄库组砂岩储层的成岩作用特征和孔隙结构特征进行研究,并指出登娄库组砂岩储层的次生孔隙发育位置,为气田开发指明了方向。     

复杂断块油田流动单元划分及剩余油分布规律研究

在掌握储层流动单元概念的基础上,系统总结了目前划分储层流动单元的各种方法。综合运用多学科理论,对我国东部某复杂断块油田应用聚类分析法找到了划分流动单元的有效参数和定量界限,并在该断块整套储层中定量划分出四套流动单元,它们各自具有不同的岩性和储层物性。综合研究流动单元类型与剩余油分布的密切关系,揭示了该断块油田流动单元类型与剩余油分布的关系。     

化工原理双语教学的探索与体会

本文从教材选编、教学方法和对学生能力的培养等几个方面,总结了近年来我校在实施化工原理双语教学中进行教学改革的经验和体会,认为双语教学应该因材施教,根据学生对双语课程的反馈采用适宜的教学方法,同时探讨了今后如何更有效地开展双语教学的课题。     

大庆油田多学科油藏研究一体化平台研制

多学科油藏研究一体化平台是基于Windows操作系统、以局域网络为传输通道、以开发数据库和精细地质研究成果为基础的多学科工作平台。本文扼要介绍了平台的研发背景、总体思路、开发环境,详细描述了数据共享、精细地质建模、精细油藏数值模拟及三维可视化的功能设计与实现方法,最后客观评价了平台的优势与不足。