节能型合成氨联产甲醇装置设计总结

我公司原合成氨联产15 kt/a甲醇装置用2个DN800甲醇合成塔配套DN800、DN1 200双塔蒸馏系统生产。随着公司合成氨翻番扩建工程的投产,为进一步降低合成氨净化系统的能耗,减轻铜洗的负荷,稳定合成氨系统生产,便于公司产品结构调整,新设计、建造了1套联醇装置。该装置粗醇系统利用原DN1 400尿素合成塔改制成甲醇合成塔和分离器外壳,内件重新设计,精醇系统利用原DN1 200塔作预塔,新上DN1 600主塔,粗醇生产能力为40 kt/a,精醇生产能力为45 kt/a。该装置一次开车成功,其设计有不少独特之处,现总结如下。1 40 kt/a粗甲醇系统1·1工艺简述压缩…     

合成氨、甲醇变脱系统综合改造小结

安化集团公司现有合成氨生产装置两套 ,年生产能力均为 1 2 0kt/a;甲醇生产装置一套 ,年生产能力为 5 5kt/a ;甲胺、DMF生产装置各一套 ,年生产能力分别为 2 0kt/a。公司造气工段采用的是固定床煤气炉间歇制气。老合成氨系统半水煤气经过常压脱硫 ,中温变换 ,变换气脱硫、脱碳 ,低温变换 ,ZnO脱硫 ,二次脱碳及甲烷化净化后 ,在 31 0MPa压力下进行氨合成。原设计生产能力为 60kt/a ,经多次技术改造 ,现已达到 1 2 0kt/a。在系统改扩产过程中 ,公司净化车间经一系列改造后 ,基本达到扩产要求 ;变脱系统一直未改 ,工艺指标虽能得到保证 ,但…     

大庆600 kt/a乙烯装置改造中的新技术应用

介绍了中国石油大庆石化公司化工一厂600 kt/a乙烯装置改造所应用的新技术:KBR公司SC-Ⅰ型100 kt/a毫秒级裂解炉的主要技术优势及应用情况;双塔脱乙烷系统的技术特点及应用情况。     

BASF将生产更多的聚四氢呋喃

BASF公司准备将位于Ludwigshafen聚四氢呋喃生产能力提高2.5倍,由原来的16kt/a提高到56kt/a,这套装置将成为世界上最大的装置,并将于2002年初完工。2000年10月BASF公司在韩国开工了1套聚四氢呋喃装置,其生产能力已经由20kt/a提高到30kt/a。BASF将生产更多的聚四氢呋喃@金山     

热管锅炉在硫磺制酸装置转化系统的应用

衡阳天友化工有限公司80 kt/a硫磺制酸装置是30 kt/a钛白粉装置的配套装置,于2004年8月建成投产.为了满足30 kt/a钛白粉装置用酸的需要,公司于2006年对硫酸装置进行扩产改造,硫酸产能由80 kt/a提高到95 kt/a,装置的废热利用率提高了10%.现将装置技术改造及转化系统热管锅炉的运行情况介绍如下.     

多元料浆造气生产小结

0　前　言我公司原有1套105kt/a煤氨和1套60kt/a油氨生产系统,2001年经过节能改造后,煤氨系统生产能力达到170kt/a,而油氨系统则因原料重油价格持续上涨出现严重亏损,被迫于2002年8月停产。油氨装置的停产给我公司生产和内部互供物料平衡带来了许多不利因素,主要有以下不利影响     

醇改氨项目等温变换工艺改造及运行总结

为缓解甲醇市场行情长期萎靡不振对公司的影响,将1套100 kt/a甲醇生产装置改造成100 kt/a合成氨生产装置。改造新增1台等温变换炉并采用特制的催化剂,解决了在水煤浆制气条件下高CO含量、高水气比变换及生产合成氨的深度变换问题。介绍了改造前、后系统的工艺流程,总结了改造后的运行情况和存在的问题。     

GE MOST紧急停车系统在300kt/a尿素装置的应用

介绍GE MOST紧急停车系统在柳州化工股份有限公司300 kt/a尿素装置上的应用情况,详细阐述了GE MOST系统的硬件配置、软件功能和主要控制回路逻辑。     

国产甲胺催化剂在大型装置上的应用

我公司第1套有机胺装置(A#系统,设计产能8 kt/a,后经技改达20 kt/a,目前已因产能小停运)于2000年投料试车,经过多年的不断技术创新和发展,目前我公司已成为世界上最大的甲胺、DMF生产商,有3套甲胺装置(B#、C#系统产能均为60 kt/a,D#系统产能为80 kt/a)和3套DMF装置(产能分别为100 kt/a、80 kt/a、     

合成氨联醇装置甲醇系统出现铵盐的原因分析

1问题描述我公司采用的是合成氨联醇生产模式,第1套甲醇装置于1995年投入生产运行,生产能力为20 kt/a;第2套甲醇装置于2001年投入生产运行,生产能力也为20 kt/a。合成氨系统的生     

国内外丁辛醇发展趋势分析

2010年我国是世界上主要的丁辛醇进1：3国家．正丁醇和辛醇的净进17量分别为62-3万t和46．1万t。预计2015年我国正丁醇和辛醇的市场供需缺口分别约为24．8万t和11．2万t．我国仍将是世界上主要的丁辛醇进口国,产品具有较好的市场发展潜力。根据国内外丁辛醇市场历史数据,结合市场需求预测,分析了我国“十二五”期...     

TPS控制系统在催化剂生产装置中的应用及其特点

通过对TPS系统结构分析以及它在催化剂装置的应用情况,介绍了TPS在催化剂装置的基本配置及软件组态并阐明了其性能特点。     

Facile and scalable fabrication of bioderived flame retardant based on adenine for enhancing fire safety of fully biodegradable PLA/PBAT/TPS ternary blends

The facile fabrication of a bioderived flame retardant (marked as ATMP-A) via ionic exchange between adenine and amino trimethylene phosphonic acid was reported in the present work. The incorporation of ATMP-A endows the poly lactic acid (PLA)/poly butylene adipate-co-terephthalate (PBAT)/thermoplastic starch (TPS) ternary blends with improved fire safety without negatively affecting the biodegradability. The PLA/PBAT/TPS blend containing 18 wt% ATMP-A alone achieves a UL-94 V-0 rating with a higher LOI value (28%). Meanwhile, its peak of the heat release rate and total heat release are reduced by 60.5% and 34.1% as compared with the PLA/PBAT/TPS ternary blend, respectively. Such excellent flame retardancy is mainly attributed to the formation of the intumescent flame retardant system in which ATMP-A acts as both acid and gas sources together with TPS as a natural carbon source. Based on the analysis of the volatile gases and the char residues, a possible flame retardant mechanism including gas phase and condensed phase is proposed. This work provides a novel and effective idea for improving the fireproof performance of PLA/PBAT/TPS blends and will broaden its practical application fields, such as, agricultural film and packaging fields.     

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。     

UCN网络故障的分析和处理

阐述了Honeywell公司的TPS(Total Plant Solution全厂一体化解决方案)系统在260t/h循环流化床锅炉系统中的应用设计,分析了TPS常见的问题并提出预防及处理措施,以及对系统开车初期出现的UCN网络噪音故障的处理。     

盖板式热防护系统研究现状及发展趋势

本文综述了国内外关于盖板式热防护系统的研究及应用现状。盖板式热防护系统主要分为金属式热防护系统及非金属无机复合材料热防系统,本文对其各自的优缺点进行了简要的阐述,并对未来飞行器热防护系统的发展趋势进行了展望。     

Poly(lactic acid)–thermoplastic starch–cotton composites: Starch-compatibilizing effects and composite biodegradability

Poly(lactic acid) (PLA) is a biodegradable, brittle, and high-cost polymer, which can be applied over structural components and green packaging. In this study, we reinforced PLA with natural cotton (10 wt %) and thermoplastic starch (TPS; 3 wt %) to obtain a biodegradable and lower cost composite. TPS was incorporated in three distinct ways: it was blended, coated, and blended and coated. In this study, we investigated the compatibilization of TPS in the improvement of matrix-reinforcement adhesion and increase in the tensile behavior without a compromise in biodegradation. The samples were investigated with thermal analysis, dynamic mechanical thermal analysis, tensile testing, scanning electron microscopy, confocal laser scanning microscopy, and hydrolytic degradation. The results show that the coupling effect was more pronounced in the PLA_TPS–cotton_TPS (hybrid system with PLA and cotton) hybrid system. This formulation presented a higher glass-transition temperature, thermal stability, storage modulus, wettability, and ductility. The TPS addition improved the adhesion between the matrix and starched cotton fiber and retarded abiotic biodegradation. These properties will allow for green applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47490.     

TPS系统在200 kt/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。     

Development and properties of zein/Tremella fuciformis polysaccharides blend as a hard capsule material

Replacement of animal-derived capsules with those of plant origin, which are safe and stable, is the development tendency at present. However, properties of pure plant materials, such as high hydrophobicity, low solubility, and poor film-forming ability, restrict the popularization and application of plant capsules. In the present study, a novel blend of zein and Tremella fuciformis polysaccharides (TPS) was developed by a facile one-step shear method. Properties of the blend were investigated to show its potential in being used as raw materials for capsule shells. According to viscosity, rheological behaviors, and microscopic morphology of the blends, TPS molecules enhance both the stability and gelling functions of the mixture by wrapping around the zein aggregations. It was revealed that the viscosity of the zein/TPS system increases with the zein content, while the elasticity of it increases with the TPS content. The films obtained from the blends were characterized by mechanical properties and SEM, showing a zein/TPS mass ratio of 7:3 leads to the most appropriate TS and highest EAB among all films tested. The FTIR and XRD analysis suggested the physical mixing of zein and TPS in the blend films. As shown by the DSC curves, the glass transition temperature (Tg) of the blend film gradually dropped with the addition of TPS, which was a consequence of the weakening of intermolecular interactions. The paper introduced the whole process, from raw material preparation to ZT capsule production, further verifying the application potentials of such a novel plant material.     

Honeywell TPS在70 m3聚合釜控制系统中的应用

介绍了美国霍尼韦尔(Honeywell)公司TPS系统在山东恒通化工股份有限公司70 m3聚合釜DCS控制系统的应用及特点。