程序升温硫化实验装置的防腐蚀措施

催化剂的硫化性能可以在全自动催化剂特征表征仪上通过程序升温硫化法(TPS)迚行表征,该实验设备简单、方法灵活、结果可靠。但是,在实验过程中,硫化气体和反应生成物会对实验装置造成腐蚀。分析了TPS实验过程中腐蚀现象产生的原因,幵对实验方法迚行了适当改迚和调整,提出了相应的防护措施。     

TPS系统在SHELL煤气化装置上的应用

文章主要介绍了Honeywell公司的TPS系统在SHELL粉煤加压煤气化,生产500kt/a甲醇及200kt/a二甲醚的化工生产装置上的应用。结合本公司应用实例介绍了TPS系统的结构、特点及其具体配置及使用,分析了其在应用过程中的问题及其产生原因、处理方法,给出了TPS控制系统在煤化工装置上的应用方面的一些见解。     

TPS控制系统在三聚氰胺装置的使用要领及安全策略

介绍了高压法工艺生产三聚氰胺装置的DCS集散控制系统基本结构和TPS系统的特点、构成、配置；分析了TPS系统网络接口模件在生产中出现的问题；提出了TPS系统单个软件安装时系统的安全策略。     

Co-Mo系耐硫变换催化剂硫化行为的研究

本文采用程序升温硫化(TPS)技术,对未负载的Co?Mo氧化物和负载在不同载体上的Co和/或Mo系催化剂的硫化过程进行了研究,分析了活性组分Co?Mo在催化剂硫化过程中的形态变化和催化剂的硫化机理,同时还探讨了载体在催化剂硫化过程中的作用。     

载体性质对耐硫变换催化剂硫化性能的影响

利用程序升温硫化（TPS）技术考察了四种不同类型载体的耐硫变换催化剂的硫化性能，结果发现,载体性质是影响催化剂硫化性能的重要因素，在载体中添加特种助剂，能显著提高催化剂的易硫化性能，降低硫化温度。     

十万吨/年SBS聚合装置用TPS系统结构原理和程序设计

本文叙述了十万吨/年SBS聚合装置的工艺流程,介绍了美国HONEYWELL公司的TPS集散控制系统的特点,并利用TPS系统的CL程序、逻辑功能、CHANGE--ZONE对SBS聚合装置的自动控制进行组态和顺序控制程序设计.通过将近一年的开车实践表明,该系统的应用软件完全达到了设计要求,实现了对生产过程的自动控制.     

丙烯酸及酯生产装置中TPS系统网络接口模件NIM频繁死机原因和对策

叙述了丙烯酸工业生产装置中的控制系统-TPS系统的结构。介绍了TPS系统在北京东方化工厂第三套丙烯酸及酯生产装置的使用过程中网络接口模件NIM频繁死机的原因及解决办法。     

TPS系统在200kt/a聚酯装置中的应用

介绍TPS系统在聚酯装置中的应用、系统的结构和组态情况,重点阐述了浆料组分控制回路和联锁逻辑系统的实现方法。运行实践表明,采用TPS控制系统提高了产品的品质,减轻了操作人员劳动强度,实现了系统化操作,达到了对生产过程稳定安全控制的目的。     

化学吸附仪在催化剂研制过程中的应用

化学吸附仪具有多种表征功能,能够对新鲜催化剂进行TPD、TPR、TPS、TPSR、单点BET等研究,也可对失活催化剂、干燥催化剂进行TPO研究.利用化学吸附仪中的脉冲吸附技术还可对催化剂的酸性、表面金属分散度、金属与载体的相互作用等进行研究.这些分析方法的使用,在催化剂研制过程中起着至关重要的作用.     

基于CL程序的多回路一键切换

以某聚酯生产装置为背景,介绍采用装置TPS控制系统的CL/HPM和VB编写多回路控制一键切换程序,杜绝了误操作,满足了现场生产工艺的需求。     

用TPS实现聚酯主装置的集散控制

介绍聚酯主装置的S-艺流程,阐述TPS系统的基本结构、硬件配置、冗余技术的应用,以及几个典型复杂控制回路利用的组态方案．     

Bently 3500型监测系统测量数据在DCS操作站上的显示

企业压缩机运行状态监测使用3500型系统,其测量值通过串联数据通信接口送入DCS,通过Honeywell TPS的操作站进行数据显示、组态,可以实现压缩机状态实时监测的棒图和压缩机图的直观显示。     

ABSTRACTS

Practice and Discussion to Achieve p（ SO2 ） ≤400 mg/m3 in Tailgas Emitted from Sulphuric Acid Plant Using New AS Series Catalyst;Progress and Prospect for Application of Lithium Iron Phosphate Modification Technology in China;Technological Progress in Wet-process Phosphoric Acid Concentration Plant of China;     

TPS控制系统在马钢新区焦化系统的应用

介绍了马钢新区焦化TPS控制系统的功能和特点,通过诸如焦炉煤气集气管压力和煤气鼓风机压力的控制与平衡、TPS系统与PLC子系统的兼容和复杂控制、生产管理信息系统的建立等一系列控制方案在工艺生产过程的应用,充分体现了TPS系统的控制稳定性以及先进的管控一体化理念。     

TPS系统在国产化聚酯装置的应用

介绍了采用国产化技术装备的聚酯装置工艺流程。阐述了TPS系统的基本结构、该系统硬件配置、冗余技术的应用。重点介绍几个典型复杂控制回路的组态方案。该系统已投入运行，稳定可靠，对同类装置有一定的借鉴意义。     

Thermo‐structural design of ZrB2–SiC‐based thermal protection system for hypersonic space vehicles

The leading edges of hypersonic space vehicle experience high temperature and stress due to prevailing aerothermodynamic conditions of extreme heat flux and pressure. The design of thermal protection system (TPS) to protect the metallic airframe structure can ensure longer life and reliability under flight conditions. The effective design of TPS system requires the precise quantitative understanding of thermo‐mechanical stresses and deformation, which demands careful computational study under flight simulated conditions. In the above perspective, TPS design for a leading edge exposed to Mach 7 hypersonic flow for 250 seconds has been carried out by performing finite element‐based thermo‐structural analysis with pressure and heat flux estimated from computational fluid dynamics analysis (CFD). The fidelity and robustness of CFD scheme is established using grid independence and convergence analysis. CFD analysis effectively captures the formation of bow shock around the leading edge and stagnation region near its nose. For finite element analysis, high‐quality structural elements have been generated using HyperMesh to precisely model the thermo‐structural behavior of TPS. In our computational analysis, TPS is modeled as a three‐layered system with outermost layer of ZrB₂‐SiC, middle layer of phenolic cork and innermost layer of Ti‐alloy. The analytical values of spatial variation of temperature, stress components, and displacement across the TPS have been critically analysed to rationalise specific structural configuration for better thermo‐structural stability. Together with temporal variation of temperature, the implication of such computational results has led us to propose a new design for TPS. The proposed TPS is capable of containing the stress and displacement within 32 MPa and 0.58 mm, respectively, when the leading edge is exposed to shock induced aero‐thermal heating as high as 2.11 MW/m² and pressure of 72.8 kPa for a hypersonic cruise flight of 500 km range.     

DCS实现合成分子筛控制系统

针对合成氨增产改造过程中新增分子筛装置的工艺特点,研究开发分子筛工艺的顺序控制系统。结合现有的仪表设备与DCS系统,从分子筛工艺流程、TPS硬件配置、分子筛系统顺序控制步骤和人机界面等方面介绍了DCS顺序控制应用于分子筛装置的实现过程与应用效果。     

NARI-NC2000计算机监控系统在水电厂的应用

介绍池潭水电厂计算机监控系统的发展和改造情况,包括计算机监控系统的改造原则、系统结构、硬件配置、软件组态的主要功能以及NC2000软件功能应用和软件的特点等。     

Attractiveness of Constitutive and Herbivore-Induced Sesquiterpene Blends of Maize to the Parasitic Wasp <Emphasis Type="Italic">Cotesia marginiventris</Emphasis> (Cresson)

Plant volatile compounds induced by herbivore attack have been demonstrated to provide a signal to herbivore enemies such as parasitic wasps that use these volatiles to locate their hosts. However, in addition to herbivore-induced volatiles, plants often release volatiles constitutively. We assessed the interaction between herbivore-induced and constitutively released volatiles of maize in the attraction of the wasp Cotesia marginiventris that parasitizes herbivorous lepidopteran larvae feeding on maize. Experiments were carried out with olfactometers in which the sources of volatiles were transgenic Arabidopsis thaliana plants overexpressing maize sesquiterpene synthases that produce blends of herbivore-induced or constitutive compounds. We found that the constitutive volatiles of maize terpene synthase 8 (TPS8) were attractive to C. marginiventris, just like the herbivore-induced volatiles of TPS10 studied earlier. A mixture of both the TPS8 and TPS10 volatile blends, however, was more effective in parasitoid attraction, indicating that constitutively released sesquiterpenes enhance the attraction of those induced by herbivores. While C. marginiventris did not distinguish among the volatiles of TPS8, TPS10, nor those of another maize sesquiterpene synthase (TPS5), when these blends were combined, their attractiveness to the wasp appeared to increase with the complexity of the blend.     

Characterization of Two Homogalacturonan Pectins with Immunomodulatory Activity from Green Tea

Two natural homogalacturonan (HG) pectins (M_W ca. 20 kDa) were isolated from green tea based on their immunomodulatory activity. The crude tea polysaccharides (TPS1 and TPS2) were obtained from green tea leaves by hot water extraction and followed by 40% and 70% ethanol precipitation, respectively. Two homogenous water soluble polysaccharides (TPS1-2a and TPS1-2b) were obtained from TPS1 after purification with gel permeation, which gave a higher phagocytic effect than TPS2. A combination of composition, methylation and configuration analyses, as well as NMR (nuclear magnetic resonance) spectroscopy revealed that TPS1-2a and TPS1-2b were homogalacturonan (HG) pectins consisting of a backbone of 1,4-linked α-d-galacturonic acid (GalA) residues with 28.4% and 26.1% of carboxyl groups as methyl ester, respectively. The immunological assay results demonstrated that TPS1-2, which consisted mainly of HG pectins, showed phagocytosis-enhancing activity in HL-60 cells.