优化配煤技术在水煤浆加压气化中的应用

简介了德士古水煤浆加压气化技术对煤质的要求以及配煤在其中的应用。根据其要求分析了配煤的理论依据和配煤在工业生产中应用的经验模型 ,并提出线性规划优化配比计算模型。总结了多年来配煤在工业生产中应用的经验 ,分析了配煤应用的经济效益 ,提出了今后配煤应用的设想。     

聚丙烯纤维色母粒及其应用

概述了聚丙烯纤维色母粒及其应用,提出了色母粒的一般质量要求,介绍了色母粒应用中的一些基本要求。     

水煤浆加压气化装置的优化配煤

简介了德士古水煤浆加压气化技术对煤质的要求,分析了配煤的理论依据和配煤工业应用的经验模型,总结了优化配煤的应用实例和配煤应用的经济效益。     

环境工程水处理中超滤膜技术的应用

随着水污染治理要求不断提升,对水处理技术应用的效果有着较高的要求。因此,为了更好适应环境工程技术要求,加大超滤膜技术的研究具有重要意义。对环境工程水处理中超滤膜技术的应用进行了分析,提出了超滤膜技术应用发展的建议。首先,分析了超滤膜水处理技术的特点。其次,根据技术应用实际,论述了环境工程水处理中超滤膜技术的应用。最后,提出了推动超滤膜技术应用以及发展的策略。     

玻璃纤维在防水材料中的应用

介绍了建筑防水材料的种类和国内外市场情况,从生产工艺和施工应用的角度分析了玻纤在防水材料中的应用分布,解读了玻纤胎基的质量要求,并对玻纤在防水材料中的应用前景及发展方向进行了展望。     

水基金属清洗剂在机械制造过程中的应用

本文主要阐述了机械制造过程清洗作业的特点和要求及水基金属清洗剂在机械制造过程中的应用要素和应用现状,并提出了水基金属清洗剂质量控方法和建议。     

网孔钢塑复合管在给水工程中的应用

主要介绍了网孔钢塑复合管的特点,在给水工程中的应用实例,设计计算、选材方案比较,安装要求和水压试验要求,设计要点及结论。     

挂胶履带板橡胶衬套结构特点之分析

介绍了橡胶衬套的应用及分类,简述了橡胶衬套应用在挂胶履带板上的作用和优点。研究了挂胶履带板橡胶衬套的结构和装配特点,从橡胶衬套的受力情况、装配过盈量、装配预扭角的确定以及橡胶材料的性能要求等多个方面进行了分析,提出了橡胶衬套制造的工艺要求。     

改性煤沥青在炭素生产中的应用

概述了沥青的分类和性质以及沥青改性、改性方法,讲述了在改性煤沥青生产应用中的要求,改性沥青的应用过程、效果和缺点。根据实验数据阐述了在改性煤沥青生产应用中的温度选择。结果表明,改性煤沥青特有的高软化点和粘度决定了在熔化、输送和混捏过程对温度的要求较高。数据分析表明软化点不能够准确指导下料温度,而粘度与下料温度呈正比例关系。因此,粘度可以作为下料温度的一个可靠的参考指标。     

塑料杯注射模设计

分析塑料杯的结构设计、性能和工艺要求,设计了1模1腔注射模。介绍该零件的注射模具设计,重点介绍浇注系统、顶出机构及冷却系统设计中铍铜合金材料的应用,介绍了模具工作过程。在实际应用中模具动作平稳可靠,生产的塑件符合设计和使用要求。     

12MW抽汽背压式汽轮机组应用总结

介绍了12 MW抽汽背压式汽轮机组的运行参数、工艺流程、主要设备及设计特点;简述了机组的调试和运行情况;排查了机组试车过程出现的问题及原因;提出了机组运行的注意事项。结果表明,机组总投资1 300万元（含土建、管道安装费用）,机组现满负荷运行,每小时节电3 696 kW.h,每年可节约开支1 117万元,1年多即可收回投资。     

苯菲尔蒸汽压缩机组故障分析及运行管理要求

分析了合成氨装置净化系统苯菲尔蒸汽压缩机组出现频繁跳车、导流阀拉杆断裂、油路系统堵塞、过滤器压差高等故障的原因;提出了应对处理措施;阐述了避免故障的机组日常运行维护管理要点.     

粉末活性炭-淹没式中空纤维膜过滤装置系统除酚研究

淹没式中空纤维膜过滤装置对污染物的去除，不仅是超滤膜的截留筛分在起作用，曝气作用及超滤膜对污染物质的吸附也起到不可忽视的作用。超滤膜无法截留酚，但膜过滤装置具有一定的除酚能力，曝气强度与酚去除率基本呈线性关系。粉末活性炭的投入，增强了淹没式中空纤维膜过滤装置的除酚能力，系统酚平均去除率为94．99％。     

Scale-up relationships of spouted beds by solid stress analyses

This article describes a new set of scale-up parameters of spouted beds derived from solid stress analyses. Compared with the first set of scale-up parameters of spouted beds proposed by He et al. [He Y. L., Lim C. J., Grace J. R., Scale-up studies of spouted beds, Chemical Engineering Science, 52 (2), 329-339, 1997], this set introduced a new parameter, the coefficient of restitution of particles, that accounts for the effects of particle-particle collisions in the spout region of a spouted bed. To verify the present set of scale-up parameters, a series of experiments were designed and conducted in two spouted beds of 80 mm and 120 mm in diameter, respectively, operated in the different testing cases consisting of different combinations of the involved scale-up parameters. The results showed that the more closely the scale-up parameters of the spouted beds tested were matched, the higher hydrodynamic similarity could be achieved. The comparisons of the hydrodynamic properties such as fountain height, spout diameter and bed voidage measured in the different testing cases revealed that the coefficient of restitution of particles could significantly impact the particle-particle interactions and thus its effects should be taken into account in scaling-up spouted beds.     

Modelling of a dynamic multiphase flash: the positive flash: Application to the calculation of ternary diagrams

A general and polyvalent model for the dynamic simulation of a vapor, liquid, liquid–liquid, vapor–liquid or vapor–liquid–liquid stage is proposed. This model is based on the τ-method introduced as a minimization problem by [Comput. Chem. Eng. 22 (7/8) (1998) 897] for steady-state simulation. They suggested modifying the mole fraction summation such that the same set of governing equations becomes valid for all phase regions. Thanks to judicious additional switch equations, the τ-formulation is extended to dynamic simulation and the minimization problem is transformed into a set of differential algebraic equations (DAE). Validation of the model consists in testing its capacity to overcome phase number changes and to be able to solve several problems with the same set of equations: calculation of heterogeneous residue curves, azeotropic points and distillation boundaries in ternary diagrams.     

A divide and conquer approach to fast loop modeling

We describe a fast ab initio method for modeling local segmentsin protein structures. The algorithm is based on a divide andconquer approach and uses a database of precalculated look-uptables, which represent a large set of possible conformationsfor loop segments of variable length. The target loop is recursivelydecomposed until the resulting conformations are small enoughto be compiled analytically. The algorithm, which is not restrictedto any specific loop length, generates a ranked set of loopconformations in 20–180 s on a desktop PC. The predictionquality is evaluated in terms of global RMSD. Depending on looplength the top prediction varies between 1.06 Å RMSD forthree-residue loops and 3.72 Å RMSD for eight-residueloops. Due to its speed the method may also be useful to generatealternative starting conformations for complex simulations.     

The char structure characterization from the coal reflectogram

Coal is a heterogeneous substance and its heterogeneity is identified and characterized by variation in reflectance. The main objective of this paper is to characterize the heterogeneity of char and to correlate it with the coal reflectogram, which accounts for both rank and maceral composition effects. Chars from two density fractions in a set of coals were obtained in a Drop Tube Furnace (DTF) at 1400 °C in N₂ environment. The chars were examined under a Scanning Electron Microscope (SEM) and the morphology information was obtained from the image-processing technique. The average porosity of char changes systematically with the FMR of its parent coals (defined as the summation of each reflectance multiplied with its frequency). The char porosity increased with an increase in FMR up to a critical value around 98. With further increase in FMR, the corresponding char becomes dense. The char macro porosity distribution was found to be related to the coal reflectogram. In general, the char porosity distribution shows two peaks, which corresponds to the inertinite and vitrinite peaks in reflectogram. The intensity depends on the maceral content. The relationship between the char porosity and coal reflectance for this set of sample has been found, which is strongly dependent on the coal rank. However, these findings cannot be applied to coals with a strong maceral association (microlithotype).     

苯罐区及装卸车的设计

简述了介质苯的毒性危害及在石油化工领域的重要性,苯罐区设计设置有毒气体检测、氮封和伴热,还应设置事故泄压设施,应考虑储罐接收油时流速,防止静电积聚。苯管道不应布置在可通行的管沟内,苯管道上的放空与放净应设双阀,并应排入密闭回收系统。装卸车必须设密闭油气回收设施,自动化程度要高,有防溢流措施;放空、排污至密闭排污系统设计等。     

Grids for Assessing Colour Appearance

A technique of subjective magnitude estimation has been used to assess a set of pseudosurface colours, each having a luminance equal to half that of its adapting surround. Five observers scaled each of the colours three times in each of two adaptation conditions corresponding to daylight and tungsten light at 120 cd/m². Loci of constant hue and saturation were derived in u', v' chromaticity space for daylight and tungsten light. These grids enable the appearance of a colour to be specified from a knowledge of its chromaticity coordinates and they enable such effects as colour constancy and colour fidelity to be investigated in terms of perceived colour appearance.     

Access数据库软件尿素出厂计量统计中的应用

介绍尿素出厂数据库的建立与管理方法,依照这种方法可以轻松建立各种需要的数据库,所建立的数据库可以实现信息票据即时打印,所有信息的各种条件即时汇总、查询,极大提高工作质量和效率.