钢塑管涂塑时产生气泡的原因及解决方法

指出了钢塑管在涂塑生产过程中，由于镀锌、喷砂、焊接及原材料本身等原因导致在涂塑层特别是环氧树脂涂层极易产生气泡等质量缺陷，通过采取严格控制生产工艺参数，严把原材料质量关等措施可有效杜绝气泡的产生，显著提高了产品质量。     

带钢热镀锌及其保护气体的技术发展

介绍了带钢热镀锌技术的发展,同时对其保护气体技术作了重点阐述。     

裂解炉辐射段旧管的焊接

分析了长时间高温运行后裂解炉辐射管相对于新管在成分、组织、性能上的变化,进而对旧管焊接性进行了分析,并提出了旧管的焊接工艺。     

不锈钢光亮卧式无马弗退火炉设计

简单介绍了H2作为反应介质的不锈钢光亮卧式无马弗退火炉的设计过程,包括炉腔尺寸的确定、炉衬材料的选择和分布以及功率确定,总结了设备投入生产1年多来运行的状况等.     

辐射管搪烧炉制品加热计算

分析并推导辐射管搪烧炉炉膛辐射换热计算公司和制品加热时间计算方程,讨论了辐射管管距对制品加热时间和炉墙温度的影响。     

辐射管搪烧炉传热数学模型研究

利用假想平面法建立了室式辐射管搪烧炉传热数学模型,并进行了仿真计算,结果表明,假想平面法能够大大简化室式辐射管搪烧炉内大量的角系数的计算,并可对炉子的有关参数(如辐射管的距径比、布置、炉墙结构等)进行优化计算。     

基于神经网络规则抽取的带钢热镀锌质量监控模型

为了克服传统神经网络产品质量监控模型中解释性差的困难,提出了基于神经网络规则抽取的带钢热镀锌质量监控模型. 以带钢热镀锌生产中锌层重量监控为研究对象,利用神经网络规则抽取方法对样本数据进行学习,以知识规则的形式给出模型中输入(原料参数及生产控制参数)与输出(产品质量)间的定量关系,用于对生产控制参数的设定与更新. 选取756个训练样本和376个测试样本分别对网络进行了训练和检验,结果表明,新模型中的知识规则覆盖率达到94.8%,并可根据输出变量的目标区间快速地设定各输入变量的范围,为产品质量的自动控制提供了有效的方法.     

乙烯裂解炉辐射管的现场修复

本文重点介绍了乙烯裂解炉辐射管错位量过大的现场修复方法;并对炉管进行了受力分析。     

火筒式加热炉燃烧器辐射管改造技术探讨

本文分析了油田火筒式加热炉的损坏原因,对火筒式加热炉使用燃烧器辐射管的使用情况进行了评价,有效的解决了加热炉鼓包和腐蚀情况。     

光整热镀锌板磷化过程中铝离子的影响及消除

将光整热镀锌板磷化技术用于空调器的生产，探讨了磷化液中铝离子对磷化膜质量的影响，在磷化液中加入氟化钠可消除铝离子的影响，介绍了铝离子的分析方法，该工艺所得磷化膜结晶细致，与涂层附着力好。     

橡胶厚制品正硫化时间确定方法的探讨

通过对气泡法、刚度测试法、经验计算公式法等测定橡胶厚制品正硫化方法的验证,指出其局限性,并提出简便易行的硬度测试法测定正硫化时间的方法。同时提出在计算机有限元模拟仿真的帮助下,利用经典的理论方程,计算橡胶厚制品的正硫化时间,将会成为一种简便、快捷、成本低廉的方法。     

Temperature field simulation of polyolefin-absorber mixture by FDTD-FDM model during microwave heating

This work has performed a numerical simulation of the temperature field during microwave heating of polyolefin-absorber mixture by means of a combined electric and thermal model. A finite difference time domain was used to model the electric field distribution within the cavity, while the finite difference method was used to calculate the temperature field distribution in different reactors. This study has focused only on the process from room temperature to 500 K for reducing heating time and energy consumption. This temperature range is a process with high energy consumption, difficult to control and great influence on the follow-up reaction. Temperature dependence of dielectric properties and thermal properties of heated materials are fully considered and simulated through an iterative process. The simulation results show that input power, the size and location of the heated materials, the position of the waveguide, and the kinds of microwave absorbers are important factors affecting the heating process. As a result, the uniform temperature distribution (the temperature difference T_d < 10 K) can be achieved by choosing the appropriate input power (500–2000 W), the appropriate proportion of microwave absorber (the volume ratio of SiC to HDPE is 30:70), and combining with the moving and rotating of the heated materials. The uniform temperature field obtained without mechanical stirring is very important for reducing energy consumption and subsequent reactions.     

我国中厚缓倾斜磷矿地下采矿方法的发展

本文以金河、荆襄、开阳磷矿为例,简要论述了我国化学矿山中厚缓倾斜磷块岩矿床地下开采方法的发展变化情况。     

低阶煤低温干馏炉中低温燃烧室温度场分布模拟及结构优化

用CFD Fluent 6.3软件对自主研发的与增收低温焦油炭化室相配套的褐煤热解旋流式低温燃烧室（1500 mm×200 mm×1500 mm）内温度场分布进行了模拟研究和结构优化,结果表明：在燃烧室内坐标为（?25,550,0）和（25,?550,0）处设计两个关于燃烧室中央轴对称半径为100 mm的130°圆弧形挡板,燃烧室内平均温度（755 ℃）满足褐煤低温热解需求（500～650 ℃）;Realizable k-ε湍流模型、P-1辐射模型和非预混燃烧模型适用于计算焦炉煤气和空气低温燃烧室内温度场分布,模拟计算结果与实验结果基本吻合,误差波动幅度为50～70 ℃,满足工业要求。     

中温玲珑釉的缺陷改善

针对玲珑釉“鱼眼”和“凹眼”这两大常见缺陷,在探索性实验的基础上,进行配方改善研究,并对工艺参数进行了探索.结果表明,采用烧硼酸钙取代方解石,并严格控制玲珑釉的工艺参数,可获得良好的中温玲珑釉.     

CFD–DEM simulation of tube erosion in a fluidized bed

The erosion of the immersed tubes in a bubbling‐fluidized bed is studied numerically using an Eulerian–Lagrangian approach coupling with a particle‐scale erosion model. In this approach, the motion of gas and particles is simulated by the CFD–DEM method, and an erosion model SIEM (shear impact energy model) is proposed to predict the erosion of the tubes. The model is validated by the good agreement of the simulation results and previous experimental data. By analyzing the simulation results, some characteristics of the tube erosion in the fluidized bed are obtained, such as the distribution of the erosion rate around the tube, the variation of the erosion rate with the position of the tube, the effect of the friction coefficient of particles on the erosion, the relationship between the maximum and the average erosion rate, etc. The microscale behavior of particles around the tubes is also revealed and the linear relationship between the erosion and the shear impact energy is confirmed by the simulation results and experiment. The agreement between simulation and experiment proves that the microscale approach proposed in this article has high accuracy for predicting erosion of the tubes in the fluidized bed, and has potential to be applied to modeling the process in other chemical equipment facing solid particle erosion. © 2016 American Institute of Chemical Engineers AIChE J, 63: 418–437, 2017     

硫氰酸盐光度法测定高温合金钢中钼、钨

硫氰酸盐光度法是测定钼、钨的经典方法。试样经溶解后,用氯化亚锡作还原剂,在硫酸介质中,Mo（Ⅵ）被还原为Mo（Ⅴ）,然后与SCN-形成显桔红色配合物,而钨不被还原,用强还原剂（如三氯化钛）钼可被还原到更低价,而不与SCN-显色：而钨被还原为五价与SCN-显色;因此在同一溶液中测定钨、钼。本文就该法的测定做进一步的阐述。     

纺粘法扁平狭缝牵伸器喷射流场的数值模拟

采用标准K-ε模型描述了纺粘法扁平狭缝流道牵伸器喷射流场的湍流运动,利用有限差分法对该模型求解。通过对6种纺粘法牵伸器喷嘴的喷射流场进行数值模拟,得到了相应的流场矢量图。分析流场矢量图发现,适当减小拉伸段宽度,增加喷射喷口长度,适当选择牵伸器喷口宽度和牵伸器的拉伸段长度,有利于提高气流速度,从而有利于对聚合物熔体进行气流拉伸,使纤维直径变细,提高纺粘法成网的质量。     

文中油田污水降油处理改造及效果评价

文中油田产出水中油含量高，降油及相关污水处理难度大，处理后水质指标低，为此，分别进行了室内降油试验和现场改造应用。结果表明，含油大幅下降，现场水质指标明显提高，能够满足油田注水水质要求。