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关键词： Aspen Plus   分离工程   教学改革  

摘要： 分离工程是化工专业的一门主干课,具有很强的工程实践性。为了培养化工专业学生的工程实践与创新能力,将Aspen Plus化工流程模拟软件应用于分离工程课程教学。探讨了Aspen Plus软件的学习方法,及其在课程教学中的具体应用。采用该软件辅助教学,可以激发学生学习热情,加深对课堂内容的理解,拓展视野和知识面,增强工程意识和工程思维,获得了良好的教学效果。

关键词： 环境效益   工程评估   指标体系   洱海   水华  

摘要： 该研究在2018年洱海蓝藻水华控制工程监测数据的基础上,以挖色湖湾藻水分离站为例,按照有效性、可靠性、安全性和经济性原则筛选评估指标,将藻细胞密度、叶绿素a、COD、氨氮、总磷、总氮、铝、氯化物等水质监测指标纳入其中,采用层次分析法确定权重,构建包括3个层次共16个指标在内的环境绩效综合评估指标体系,精准识别蓝藻控制工程的水华处理效果。据此得出挖色湖湾藻水分离站的环境效益评估结果得分为81.4,定性判断为良好。进而针对工程在运行、监测、评估和建设等方面存在的不足提出了相应改进意见,以达到提高工程运行效益和为今后高原湖泊蓝藻水华治理工程选择提供理论依据的目的。

关键词： 分离系统   改造   设计   联合站  

摘要： 随着油田的滚动开发,吉祥联合站来液量逐渐增加,站内已建分离系统无法满足吉7井区新增气液量的处理需求。针对吉祥联合站运行存在的问题,对站内分离系统进行改造。通过站内新建高效三相分离器并调整处理工艺流程,提出切实可行、经济合理的改造方案并进行效益分析。改造后的分离系统使联合站达到了提质增效的目的,可为同类型站场改造以及新建三相分离器的选型和安装设计提供借鉴。

关键词： 新工科   分离工程   教学改革  

摘要： 根据教育部对"新工科"建设的新要求,结合实践经验,针对分离工程课程特点与教学中存在的问题,从课程思政、课程内容、教学形式等方面,对课程教学改革进行了探索,提出了科研引导、构建虚拟仿真教学平台、案例教学等教学改革措施,培养学生工程能力和工程素养,提高学生的知识应用与创新能力。

关键词： 线上教学   学生学习兴趣   生物分离工程   视频直播   授课效果   生物技术专业   课件   考核评价体系  

摘要： 线上教学是各个高校在新冠疫情背景下响应教育部"停课不停学"指导意见、完成教学任务的应急措施。我校生物技术专业必修课课程《生物分离工程》基于钉钉直播和雨课堂平台建课,通过对课程知识结构进行梳理制作适合线上教学的课件,采用课程录播+视频直播形式授课、雨课堂平台考核授课知识点的形式,并改革传统考核评价体系,激发了学生学习兴趣,取得了良好的授课效果。

关键词： 膜分离   环境工程   应用  

摘要： 随着国家经济发展水平不断提高,对于环境工程的建设项目也相应增多,要求也随之提升,进行环境工程领域的水处理过程,有助于各项环境工程项目的落实,保障工程项目的实施质量。膜分离技术是通过各种过滤膜的组合以实现对于水中杂质净化的工艺,这项技术对于环境工程建设具有重要意义。

关键词： Proteins  

摘要： Biological materials represent a major source of inspiration to engineer protein-based polymers that can replicate the properties of living systems. Combined with our ability to control the molecular structure of proteins at the single amino acid level, this results in a vast array of attractive possibilities for materials science, an interest that is undeniably related to simplified procedures in gene synthesis, cloning, and biotechnological production. In parallel, it has been increasingly appreciated that living organisms exploit liquid-liquid phase separation (LLPS) to fabricate extracellular structures. In this article, we discuss the central role of protein LLPS in the fabrication of selected biological structures, including biological adhesives and hard biomolecular composites, and how physicochemical lessons from these systems are being replicated in synthetic analogs. Recent translational applications of protein LLPS are highlighted, notably aqueous-resistant adhesives, stimuli-responsive therapeutics carriers, and matrix materials for green structural composites.

关键词： Productivity   Concreting activity   Discrete event simulation   Construction management  

摘要： Concrete pouring activity is essential for the schedule and quality of the structural work construction. In practice, the process of concrete pouring is frequently congested and interrupted due to many unforeseeable reasons. The primary purpose of this study is to explore the productivity of concrete trucks for multistory building projects. The interview technique and work sampling method have been employed to collect the necessary data. Based on the literature review and experts' opinions, twenty-five factors affecting the productivity of pouring concrete have been found and discussed. Among them, there are seven factors identified as different from previous studies. Through two case studies of the hospital project, the actual average productivity of one concrete truck used to pour concrete into columns and walls is 0.184 m(3)/min by using a truck-mounted pump and 0.087 m(3)/min by using a tower crane. These productivities have been then determined based on discrete event simulation (DES). The simulation results indicated that the simulated productivity is higher than the actual productivity of approximately 16% and 13% for truck-mounted pump and tower crane, respectively. It is concluded that DES is a handy simulation tool for construction operations before the period of implementation. Based on the relationship between events of the process of concrete pouring, two relevant solutions have been proposed to enhance the productivity of concrete trucks. The results of this study may help practitioners manage the concreting activities in their projects with higher productivity.

关键词： 泥浆护壁成孔   泥浆分离   筛分   固化   循环利用  

摘要： 对废弃泥浆固化分离处理进行系统研究,分析总结泥浆振动筛分技术、泥浆离心分离技术、泥浆压滤分离技术特点。针对国家会展中心(天津)一期工程泥浆产出量大,同时需求土方的特点,选择泥浆免压滤直接固化分离技术,既减少了废弃泥浆的外运,加快了桩基施工进度,又实现了废弃泥浆的资源化利用,符合绿色施工理念。

关键词： Polyketone   Polydopamine   Superhydrophilicity/underwater superoleophobicity   Antifouling   Oil-water separation  

摘要： Environmental issues caused by oily pollutants is one of the most severe challenges for the global ecosystem and public health. To develop the advanced membrane materials with superior antifouling property is urgently needed for highly efficient oily wastewater purification. In this study, an ultrathin polydopamine layer with a controllable thickness of similar to 90 nm was decorated onto a porous polyketone substrate via an extremely simple and scalable surface modification process. The ammonia initiator facilitated the ultrafine polydopamine nano particles (with its size about 30 nm) in-situ assembling. Benefiting from the ultrathin surface modification, the resultant polydopamine decorated polyketone (PDA-d-PK) membrane performed ultrahigh water permeance up to 11600 L m(-2) h(-1) bar(-1). This membrane also exhibited a superior oily emulsions separation property with remarkably high permeance up to 8300-10600 L m(-2) h(-1) bar(-1), and high rejection ratio more than 99.9% against various oily phases, including hexane, hexadecane, petroleum ether, and soybean oil. The hierarchical nanosphere-like polydopamine layer with superhydrophilicity/underwater superoleophobicity also endowed the PDA-d-PK membrane with an excellent antifouling performance against the oily emulsions containing surfactant, protein, and natural organic material. The PDA-d-PK membrane also featured a superior tolerance and durability under challenging conditions of salty, strong acid/alkali solutions, and a variety of organic solvents. This work provides an insight into the facile preparation of an ultrathin polydopamine membrane with simultaneous enhancement in separation and antifouling properties for highly-efficient oil-water emulsions separation.