可提高挤出产量的沟槽加料段

介绍了沟槽加料段的结构形式，比较和分析了传统挤出机和沟槽加料段挤出机的工作特性。     

富强鑫AF系列油电复合射出机

富强鑫的AF系列油电复合式射出机，一方面具有全电式定位精准省能源的特性；一方面保有油压结构高推力的特性。AF-200采用最新的AC伺服马达驱动技术及全闭回路控制，将传统油压注塑机最耗能的加料部分改为先进的ESD（E1ectric Screw Drive）电动螺杆驱动结构，并结合德国MOOG航天级高速伺服阀及蓄压器，最大射速可达700mm／s.     

氯乙烯/N-苯基马来酰亚胺/丙烯腈三元悬浮共聚

从氯乙烯／Ｎ－苯基马来酰亚胺／丙烯腈三元悬浮共聚的技术特点出发，研究了加料方式对聚合工艺及产物颗粒特性的影响，并在此基础上考察了引发剂体系的影响，确定了适宜的引发剂种类及用量。     

对炼胶系统的几项改进措施

介绍了轮胎厂对270炼胶系统采取的几项措施，用1OkV／1000kW主电机代替6kV／1000kW电机，把液压站改为交流电机变频控制，对锁紧缸、加料门的密封结构进行了改造。     

DPP2000/400失重型粉料加料秤的改造

分析了DPP2000／400失重型粉料加料秤结构缺陷导致的机械故障原因，采用在轴承座底部添加羊毛毡垫圈等措施，对设备进行了技术改造，改造后，设备运行平稳，减少了非计划停车。     

巴陵烯烃部催化剂加料告别“白色污染” 不仅改善了作业及装置运行环境，还减轻了劳动强度

2008年10月16日，经环保部门检测，中石化巴陵石化烯烃事业部一联合装置改造后的催化剂加料间，在试运行10个月后，粉尘出口浓度由原来的300g／m^3降至目前的10g／m^3，现场粉尘排放达标率为99．8％。这项改造不仅使加料工作业告别了“白色污染”，减轻了劳动强度，还改善了加料间周围装置的运行环境。     

异戊二烯齐聚物双锂引发剂合成SBS

采用自制异戊二烯齐聚物双官能度有机锂引发剂，2步加料合成了苯乙烯／丁二烯三嵌段共聚物，所合成的SBS具有较窄的相对分子质量分布、较低的l，2-结构和良好的物理机械性能。     

TQ—203塔的改造

将已废弃不明的ＴＱ－２０３塔进行改造，经过各项准确计算，并增加加料口呼进水口等，代替ＴＱ－３０２塔使用加料量可达３５００１／ｈ，达到时了扩产设计要求。     

FQZ500离心式分级机的应用

上海某牙膏厂在原机械粉碎机系统中粉碎牙膏级摩擦型二氧化硅。加料量为１５０ｋｇ／ｈ，产品粒度为３２５目筛余量小于５％。现改为机械粉碎机联接离心式气流分级机系统，加料量提高到２２０ｋｇ／ｈ，产品细度为３２５目筛余量小于０．５％，产品粒度完全满足利华、高露...     

国内专利精选

<正>一种湿法乙炔发生器全自动加料装置及全自动控制系统：CN114736715A∥孙雪冬（中国成达工程有限公司）,公开日期：2022-07-12提供一种湿法乙炔发生器全自动加料装置及全自动控制系统,包括传输结构和用于自动控制加料时间和加料批次的控制系统;传输结构的一端设给料结构;传输结构另一端设输送结构,输送结构下部设若干加料结构;控制系统电连接给料结构、传输结构、输送结构和加料结构;     

Carpet Recycling: Determining the Reverse Production System Design

Roughly 4 billion pounds of carpet are disposed of in the United States each year. This carpet is composed of a significant fraction of nylon, polypropylene, and polyester fiber. A key limiting factor to recycling is effective design and development of the reverse production system to collect and reprocess this large volume of valuable material. A reverse production system is composed of material and chemical recycling functional elements interconnected by transportation steps. In this article, we develop a mixed-integer programming model to support decision-making in reverse production system design. To illustrate its use and applicability, we apply the model to a representative U.S. carpet recycling industrial case study. The overall economic feasibility of recycling is strongly dependent on the volumes that can be expected from investments in collection infrastructure. The geographic location of processing centers influences the network economics, and the subdivision of recycling tasks to avoid the shipment of low value material is proposed as an effective strategy for carpet recycling.     

基于BP神经网络的A/O脱氮系统外加碳源的仿真研究

对连续流缺氧/好氧（A/O）脱氮工艺处理低碳氮比（C/N）生活污水的外加碳源系统进行了仿真研究.由于处理系统的外加碳源量、总回流比和出水总氮（TN）之间存在的复杂非线性关系,很难用常规的参数型模型进行描述,给处理系统控制策略的实现带来较大的困难.针对该问题,引入了BP神经网络,通过神经网络对试验数据的学习建立系统的非参数型模型,通过该模型对系统进行仿真研究,可以达到优化碳源投加量的目的.研究结果表明,经过训练的BP神经网络模型可以很好地模拟处理系统,根据仿真分析结果可以实现碳源投加量的优化控制,这为污水处理系统在线最优控制的实现提供了一条可行的途径.     

Mathematical model of the liquid flow pattern in an aerotank-sedimentation tank system

An analytical solution has been obtained for the mathematical model of the liquid flow pattern in an aerotank-sedimentation tank system with recycling in the form of a dispersion dependence on the model parameters: the Peclet number and recycling stream fraction. A technique is offered to determine the model parameters.     

回流比对单级UASB-A/O处理晚期垃圾渗滤液短程脱氮的影响

采用"单级UASB-A/O组合工艺"处理实际晚期高氨氮城市生活垃圾渗滤液,在获得稳定的有机物与氮同步去除的前提下,重点考察了不同回流比条件下(100%～600%),UASB与A/O中的污泥分布、DO浓度,UASB中同时反硝化与产甲烷的活性,A/O中亚硝酸积累率的变化,组合工艺系统氮与有机物的转化与去除.结果表明,当回流...     

新型纳米平板陶瓷膜在纸箱生产废水回用中的工程应用

采用混凝沉淀+水解酸化+MBR+活性炭吸附组合工艺来回用纸箱厂废水。MBR膜采用的是新型纳米平板陶瓷膜。介绍了各处理段的工艺特点、构筑物的设计尺寸、设备选型等,并对新型纳米平板陶瓷膜的清洗进行了介绍。系统运行一年,出水水质稳定,优于≤城市污水再生利用城市杂用水水质≥GB/T 18920-2002表1中的城市绿化排放标准,即BOD5≤20 g/L,浊度≤10 NTU,色度≤30,并分析了本工程的处理成本及所产生的经济效益。     

Complete isolation of target solute from multicomponent similar mixture using continuous rotating annular chromatograph with double‐stage partial recycling of effluent

A double‐stage partial recycling continuous rotating annular chromatograph was proposed in order to isolate a target solute from multisolutes with similar retention strengths. The impurities with a higher retention strength are removed from the mixture by the first stage partial recycling where the effluent of incomplete separation is recycled to the inlet adjacent to that of the raw feed mixture. The effluent containing the target solute and the impurities with a lower retention strength is sent to the second stage and the target solute is isolated and collected. The optimum arrangement of the recycling channels and their corresponding nozzles was determined using a numerical calculation based on a mass transport model. The quadruple saccharides of kestose, sucrose, glucose and fructose were used as model solutes for experimental verification. The distribution coefficients needed for the numerical calculation were obtained from adsorption experiments. The effectiveness of the proposed technique was first verified using a two‐apparatu system. On the basis of the two‐apparatus method, the guide to designing a suitable single apparatus was discussed regarding the capital cost savings. The model target solute, sucrose, was isolated using a single apparatus by special recycling of a part of the effluents containing sucrose and kestose with a lower retention strength to the inlet of the first stage. All experimental concentration profiles of the respective saccharides were in reasonable agreement with the calculated ones. Copyright © 2005 Society of Chemical Industry     

Development of a practical model for capacity evaluation of ultrapure water systems

Modern ultrapure water (UPW) systems designed for the semiconductor manufacturing industry are very complex nowadays, especially when wastewater recycling is part of the configuration. In this paper, we developed a practical model for system evaluation by correlating the actual UPW consumption rate, TI, with the velocity of water level changes (ν) in the storage tank. It was found that the UPW consumption rate is a sole function of the velocity of water level changes in the water storage tank that could be described by the following equation: ν 1-Kv. The model was then applied to a standardized UPW system to examine its accuracy and found good agreement between the estimated and actual results. When process-to-process recycling is included in the model, the equation is still valid; however, the system-related coefficient K decreases with increasing recycling capacity. By properly estimating the engineering parameters of an UPW system, a generic ν graph can also be plotted based on this equation. This ν graph provides accurate UPW flowrate information as the variation ofwater levels in the DI storage tank is monitored online, which can be easily used for capacity evaluation of an UPW system operating with or without wastewater recycling at the outset of any UPW expansion project.     

Chemical recycling of polymers from Waste Electric and Electronic Equipment

This research is focused on the recycling of three types of polymers, namely polycarbonate (PC), poly(acrylonitrile‐butadiene‐styrene) (PABS), and polystyrene (PS) from Waste Electric and Electronic Equipment (WEEE). Initially, the chemical structure of each polymeric material in a variety of WEEE was identified by Fourier Transform Infra Red (FTIR) spectroscopy and Differential Scanning Calorimetry (DSC). The potential recycling of these polymers from these wastes was examined by employing two different approaches, the dissolution/reprecipitation method and the more challenging technique of pyrolysis. During the first, the polymer is separated and recycled through a solvent/non‐solvent system. It is a simple and economic technique leading to high recovery of pure polymer. Both, model polymers and plastic parts from WEEEs were studied and optimum experimental conditions, including dissolution temperature and time, polymer concentration and type of solvent were proposed to achieve significant recovery of the polymer (>90 wt %). Furthermore, pyrolysis of waste Compact Disks (CD) was investigated and compared with model poly(bisphenol A carbonate) (PC) through a laboratory‐scale fixed bed reactor. The appropriate pyrolysis temperature was selected after measuring the thermal degradation of model PC by Thermogravimetric analysis (TGA). A large amount of oil was measured, together with a smaller amount of gaseous product, leaving also a solid residue. For both samples, the gaseous fraction consisted mainly of CO₂ and CO whereas in the liquid fraction a large amount of different phenolic compounds, including the monomer bisphenol A, was measured. It seems that recycling of used CDs by pyrolysis is a very promising technique having the potential of producing useful high‐value chemicals, which may find applications in the petrochemical industry. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

催化装置“火炬”气回收系统技术改造

结合吉化炼油厂的实际情况,科学、合理地设计了催化装置的“火炬”气回收系统的工艺流程。介绍了该厂“火炬”气回收系统的设计方法、设备计算（ 水封罐的设计、压缩机的选择等） 以及先进的自动控制系统的选择和布局等,并力求能对３０ 万ｔ／ａ 乙烯装置和芳烃装置的“火炬”气的回收起到一定的参考作用。     

偶联尿苷二磷酸循环体系的天然产物体外糖基化修饰

糖基化是天然产物的一种重要基团修饰,主要通过尿苷二磷酸(UDP)-糖基转移酶催化实现,而UDP-糖基供体价格昂贵限制了其应用,构建UDP-糖基供体再生系统可以有效解决该问题。本文从天然产物的体外糖基化修饰入手,阐述了糖基化修饰对天然产物功能的调控作用,比较了目前的糖基化修饰方法,其中基于UDP-糖基转移酶的生物法具备了重要的产业化应用前景。接着总结了各种UDP-糖基供体的合成方式,概述了偶联蔗糖合酶或海藻糖合酶的基于UDP循环的UDP-糖基供体再生系统,重点描述了UDP循环体系在萜类、黄酮类及其他化合物体外糖基化修饰中的应用,从而高效合成具有高附加值的天然产物糖苷化合物。指出偶联蔗糖合酶和UDP-糖基转移酶的循环体系是今后天然产物糖苷化合物合成的重要方式。