DJ—3新型塔盘在催化重整脱水塔中的应用

对新型DJ－3复合塔盘的性能进行了简介，简述了重整蒸馏脱水过程及特点，重点突出蒸馏脱水塔的扩能改造，总结了DJ－3复合塔盘的工业应用及生产标定情况。     

塔盘束式小直径板式塔的开发及应用

介绍一种新型小直径板式塔的结构及设计原理，与一般小直径板式塔作了相应比较，并对其实际应用情况举例说明。     

甲醇羰基合成醋酸成品塔使用情况

甲醇羰基合成醋酸中成品塔为板式ADV浮阀塔,在投产后会出现塔盘坍塌,塔板及浮阀腐蚀减薄,紧固件脱落现象,导致工艺操作不平稳,并致使醋酸成品质量不合格。本公司在实际生产过程中,对成品塔塔盘进行改造及升级,以满足实际生产需求。现将成品塔使用及改造情况介绍,供同行参考。     

网孔形接触式塔盘

网孔形接触式塔盘是一种新型塔盘。它具有负荷能力高、压降低、效率高、造价低等优点。本文介绍了网孔形接触式塔盘的结构特点、操作性能以及在化工生产中的实际应用,并与浮阀塔盘的操作性能进行了对比。     

CO2再生塔底部塔盘破坏原因分析

某引进大型化肥装置中ＣＯ＿２再生塔在初次开车过程中，其底部塔盘发生了严重的挠曲破坏，紧固在支承环上的钩头螺栓，有一半被拉脱。对该事故的原因进行了分析、计算和论证，指出了事故发生的原因，并提出了有关建议以避免类似的事故再次发生。     

L角钢挡板塔盘的精馏板效率和传质系数的研究

本文研究了Ｌ角钢挡板塔盘用乙醇－水和环己烷－正庚烷两种物系的精馏实施，着重于研究该种塔盘的精馏冒夫利效率和总传质系数的影响因素，并试对冒夫利效率和总传质系数进行关系。     

焦油馏分塔塔盘固定方法的改进

我厂焦油车间的焦油馏分塔采用铸铁制造,每层塔盘靠自重安放在塔节的凸台或支腿上。在实际生产中,塔下部的塔盘常因操作原因而使支撑塔盘的支腿损坏,导致塔盘倾斜或倾翻,严重时会破坏全塔的正常操作,被迫停产检修。     

新型垂直筛板塔在PVC生产中的应用

介绍了新型垂直筛板塔塔盘的工作原理及开发应用。该塔传质效果好，处理能力大，压力降小，操作弹性大，防自聚性能强，是具有划时代意义的新型塔，适合于在氯乙乙单体精馏操作中推广应用。     

新型槽式液体分配器的结构性能研究

介绍了一种新型的槽式液体分配器，并对其结构特点作了分析。通过模拟实际使用时液体的流动状态得出了孔流系数与雷诺数的关系式。在２．５×１０￣３＜Ｒｅ＜１．２×１０￣４的范围内，该关系式可用于工业设计。     

己二胺装置第二脱轻组分塔及成品塔的改造

针对己二胺装置第二脱轻组分塔及成品塔操作压降大、釜温高及附属系统能力不足等问题，对设备及工艺进行改造和优化，突破国外引进装置设计余量小、扩产难度大的技术难关，取得了良好的经济效益。     

乙烯酮(双乙烯酮)下游产品废水的治理技术

乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。     

生物油的成分分析及物性测定

以添加FeCl2的ZnCl2-KCl混合熔盐裂解纤维素和秸秆,制得生物油。采用傅立叶变换红外光谱法和气相色谱-质谱法分析生物油的成分。结果表明,生物油中成分复杂,含有氧元素、多种有机化合物,主要包括酮类、醛类、酚类及羧酸类等。测定了20～80℃生物油的密度和粘度,发现生物油的密度与温度呈较好线性关系,而生物油的粘度均大于水的粘度,且不同熔盐体系对秸秆生物油的粘度无较大影响。     

分解炉扩径的技术改造

我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉     

Effect of degree of deacetylation of chitosan on the kinetics of ultrasonic degradation of chitosan

The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

Process of acceleration of filtration of viscose

Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969.     

Approximation of temperature dependence of the modulus of elasticity of glass

A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses.