多级雾化超重力旋转填料床的特性及应用

介绍了超重力旋转填料床的结构、特性和工业应用情况。华南理工大学对自主开发的错流型多级雾化超重力旋转填料床进行了结构、液滴运动、气液传质和流体力学、能耗等特性的试验研究。目前,该设备已应用于燃油烟气脱硫中,最大处理气量达5×10~4m~3/h,与传统填料塔相比,具有气体压力降低、传质效率高、体积紧凑、质量轻、投资省等优点。超重力技术在烟气脱硫、除尘方面有着良好的应用前景。     

超重力烟气脱硫的实验研究

超重力旋转床(RPB)是一种高效强化传质的设备.以亚硫酸钠溶液为吸收剂,采用并流操作方式在 RPB 中进行了模拟烟气脱硫的实验研究,考察了吸收液中钠离子浓度、旋转床转子的转速、气液比(l=G/L)等工艺参数对二氧化硫脱除率的影响.实验结果表明:当钠离子浓度小于0.20 mol·L-1时.SO2的脱除率随钠离子浓度的升高...     

超重力旋转床烟气除尘脱硫脱氮一体化设备

多级离心雾化超重力旋转床不仅低阻节能、传热传质效率高,而且体积非常紧凑,重量轻,设备投资省。超重力旋转床除尘、脱硫脱氮一体化设备的推广使用,对我国二氧化硫和氮氧化物排放的控制、酸雨危害的治理将起到重大的推动作用。     

超重力技术在脱硫液再生中的探索性研究

用超重力旋转填充床替代再生槽,进行了超重力法再生脱硫液的研究。实验证明,用1台7L的超重力旋转填充床替代原有的320L再生槽,可以达到更好的再生效果。经超重力旋转填充床再生的脱硫液可提高脱硫效率、减少脱硫液的再生时间,且脱硫后出口净化气的硫化氢质量浓度均低于20 mg/m~3,满足了天然气运输的要求。     

超重力法烟气除尘机理及试验

探讨了超重力技术除尘机理,提出了利用新型强化传递过程技术--超重力旋转填料床为实验设备,采用超重力法对电厂烟气进行除尘试验研究,试验了超重力强度、液气比和填料类型等对去除尘效率的影响.实验结果表明,钢质波纹丝网填料优于尼龙丝网填料;液气比和转速较高时分级效率较高;在适宜的操作条件下,超重力法除尘可达到99%以上;压力损失小,压降小于2.4 kPa.超重力技术具有去除效率高和投资费用低等优点,在烟气除尘方面具有良好的应用前景.     

超重力技术在脱硫液再生中的探索性研究

用超重力旋转填充床替代再生槽。进行了超重力法再生脱硫液的研究。实验证明，用一台7L的超重力旋转填充床替代原有的320L再生槽。可以达到更好的再生效果。经超重力旋转填充床再生的脱硫液可提高脱硫效率、减少脱硫液的再生时间。且脱硫后出口净化气的硫化氢质量浓度均低于20mg／m^3．满足了天然气运输的要求。     

多层填料错流旋转填料床深度净化烧结烟气

针对钢铁冶炼行业中烧结烟气的特点及目前工业生产中所面临的困难,采用多层填料错流旋转床为吸收设备,Na OH为吸收剂,开展了超重力因子β、液气比L/G和不同进口SO2浓度对脱硫率η的影响实验研究。结果表明,在β=55、L/G=2. 0 L/m3、CSO增加到CSO粉尘的出口浓度低于10 mg/m3,实现同时深度脱硫除尘,达到超低排放标准。     

旋转填料床/柠檬酸盐法脱除烟气中SO2的实验研究

提出采用旋转填料床结合柠檬酸盐法脱除烟气中SO2的方法,考察了旋转填料床转子转数、液气比、pH值等因素对脱硫率的影响.结果表明采用超重力法柠檬酸盐溶液初始浓度为1.5mol/L、液气比为71/m3、超重机转子转速为1000r/min,吸收液的pH值为5.0,脱硫率达到98％以上.     

超重力旋转床转子结构与性能研究进展

超重力旋转床自问世以来受到了广泛的关注,并已应用于化学工业之中。目前,超重力旋转床转子结构的改进主要是根据其流体力学以及传质性能的要求不断地进行优化。本文根据超重力旋转床转子结构的不同,将其分为填料式、板式和复合式3种类型,并据此介绍了不同类型超重力旋转床的转子结构特点和研究现状,并对其流体力学和传质性能进行了总结、对比和分析,指出了不同类型超重力旋转床转子的优点和可能存在的问题,对化工生产过程中超重力旋转床的选型以及转子结构的研究具有指导作用。最后提出了超重力旋转床在应用方面研究的不足,并对其未来可能的发展方向进行展望,指出超重力旋转床转子结构的改进可以从填料和液体分布等方面进行研究,应用范围可以从装备集成方面进行拓展。     

超重力除尘装置的设计

超重力场在化工过程中的应用是通过填料层的高速旋转来完成的,此种装置称为超重力装置,也称为旋转填料床,是一种强化相间传质、反应及微观混合的新型设备。对超重力除尘装置的结构设计及电机功率计算进行了简要介绍,并分析了液气比和超重力因子对除尘效率的影响,为超重力除尘装置的设计提供参考。     

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。     

A study of miscibility of blends of polybutadienes of varying microstructure

The miscibility of various amorphous polybutadienes with mixed microstructures of 1,4 addition units (cis, 1,4 and trans 1,4) and 1,2 addition units have been investigated. The studies here involved optical transparency, differential scanning calorimetry, and small angle light scattering. It was found that a 90 percent (cis) 1, 4 addition polybutadiene was immiscible with high (91 percent) 1,2 addition polybutadiene. Reduction of the 1,2 content to 71 percent induced an upper critical solution temperature (UCST) with the cis 1,4 polymer. Polybutadienes with 50 percent and 10 percent 1,2 contents were miscible above the crystalline melting temperature of the cis 1,4 polybutadiene. Immiscibility of the 91 percent 1,2 addition polymer was also found with a 10 percent 1,2 polybutadiene. The latter polymer also exhibits an UCST with the 71 percent 1,2 polymer. The results are used to interpret the characteristics of blends of polybutadienes of varying microstructure.     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

粉煤灰中烧失量检测的不确定度分析

以F类粉煤灰为例,详细介绍了测定粉煤灰中烧失量的步骤、计算数学模型、影响测量不确定度的因素以及各项测量不确定度分量评定,人员、设备、材料、方法、环境都是影响测量不确定的因素。     

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。     

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     

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     

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.