桨叶——转筒组合干燥系统在沉淀硫酸钡生产中的应用

通过对沉淀硫酸钡的干燥过程分析，提出了一种全新的桨叶——转筒式二级组合干燥系统，此种方式的干燥与其它形式相比具有投资少、消耗低等优点。     

污泥干燥焚烧一体化中热量计算的探讨

介绍了几种常用的污泥干燥焚烧一体化技术及其设备,分析了污泥在转筒干燥-循环流化床焚烧一体化设备中的热量输入、输出过程,对污泥干燥以及焚烧设备的设计有一定的参考价值。     

聚氯乙烯干燥工艺介绍与对比

介绍了PVC干燥的3种常用工艺并进行了比较,认为流化床干燥工艺在装置规模、蒸汽消耗及产品质量等方面具有优势,是当前新建项目的首选工艺.     

含油污泥干燥处理技术

干燥技术处理含油污泥．已经成为国内外石油化工行业的研究热点。先简要介绍了含油污泥的来源,又着重介绍了干燥技术的主要工艺流程,指出利用干燥技术对含油污泥实现无害化和资源化,具有可资源化利用、不产生二次污染等优点,是国内外含油污泥处理处置的发展趋势。     

炼厂污水处理装置污泥干燥改造研究

某炼厂污水处理装置污泥处理后含水量较高,必须按危废品处理,处理费用高,环保压力大。通过选用桨叶式污泥干燥技术对装置进行技术改造,处理效果明显改善,污泥含水量降低为小于10%,降低了处理费用,缓解了环保压力。     

污泥干燥过程传热传质模拟

本文详细阐述了污泥颗粒在转筒干燥机内传热传质模型的建立过程,通过模拟得到了污泥颗粒表面温度、含湿量以及空气温度沿转筒轴向的分布结果,并将模拟结果与实际情况进行对比。结果表明,该模型与实际情况相符。     

铜阳极泥桨叶干燥工艺及设备研究

铜阳极泥为电解铜产物,含有大量稀贵金属,对其干燥脱水采用节能、高效、环保的桨叶干燥系统替代原厢式干燥。本文对桨叶干燥系统工艺及设备做简要介绍。     

适合高湿、高黏物料的干燥设备的研究与应用

随着化工、环保、建材等行业的快速发展,产品的种类随之增多,生产规模越来越大,需要进一步处理的高湿高黏物料也越来越多。因此,开发一种干燥大量的、高湿高黏的物料的设备是非常必要的。本文介绍了这种干燥设备的研究、开发与应用。     

过氧化二异丙苯（DCP）的干燥特性与干燥工艺研究

近几年,我国过氧化二异丙苯（DCP）的产量一直处于世界首位,干燥工艺是DCP生产中的一个很重要环节。分析了高桥石化DCP干燥生产工艺的发展和延续,介绍了DCP的干燥特性和工艺特点,以及采用卧式多室流化床干燥机的优势。     

GZQ型振动流化床干燥机在双氰胺干燥上的应用

介绍了ＧＺＱ振动流化床干燥机的性能、优点及该机在大氰胺干燥应用中取得的成效。     

氟硅酸钠干燥采用振动流化床干燥器

磷肥工业中副产的氟硅酸钠大多采用气流干燥。介绍采用振动流化床干燥的工艺流程,风量、风压的配置以及操作要点,并指出存在8问题和处理方法。     

Experimental and Theoretical Study of Agitated Contact Drying of Sewage Sludge under Partial Vacuum Conditions

Agitated contact drying experiments were carried out in a cylindrical lab-scale paddle dryer to study the drying kinetics of sewage sludge under partial vacuum conditions. To explore the drying mechanisms, the penetration model for vacuum contact drying of agitated particulate materials, developed by Schlünder and Mollekopf, was applied to simulate the experimental results. The influence of the drying parameters (system pressure, heating temperature, stirrer speed, and dryer load) on the drying kinetics was studied both experimentally and theoretically. The results indicate that pressure and temperature significantly influence the drying rates of sewage sludge, whereas stirring speed and dryer load have no obvious effects on drying rates in the examined range. The experimental and simulated drying rates were in acceptable agreement as long as the temperature difference between dryer and sludge was small. A crust is likely to form on the dryer surface, however, when the temperature difference becomes large; this crust leads to markedly lower drying rates than the calculated ones. Furthermore, a comparison between partial vacuum contact drying and atmospheric contact drying is presented. The results indicate that the mass transfer resistance increases with rising drying potential in the examined experimental range.     

Modelling Diffusion-Limited Drying Behaviour in a Batch Fluidized Bed Dryer

Fluidized bed dryers are often used to extract water from granular materials. When the drying process is mainly limited by the resistance against water transport inside the particle the drying behaviour is said to be diffusion-limited. In the literature there are several models that predict this drying process with very diverging results. In this study a model is set up to arrive at a better prediction for this drying process. The heat and mass transfer in the granular material and the drying air is described. The resulting equations are solved numerically. The model must be extended to incorporate the heat capacity of the dryer.     

Modelling Diffusion-Limited Drying Behaviour in a Batch Fluidized Bed Dryer

ABSTRACT

Fluidized bed dryers are often used to extract water from granular materials. When the drying process is mainly limited by the resistance against water transport inside the particle the drying behaviour is said to be diffusion-limited. In the literature there are several models that predict this drying process with very diverging results. In this study a model is set up to arrive at a better prediction for this drying process. The heat and mass transfer in the granular material and the drying air is described. The resulting equations are solved numerically. The model must be extended to incorporate the heat capacity of the dryer.     

气固移动流化床干燥器流化与传热特性研究

以不同粒径的分子筛颗粒与炼焦煤颗粒为原料分别在气固移动流化床干燥器内进行了双组分颗粒分级流化行为特性与气固间传热特性的实验研究。考察操作气速、颗粒直径与不同粒径配比的变化以及搅拌转速对床层阻力的影响,并对流化状态加以描述分析,研究了干燥器气固间传热特性,得出了相应的表面传热系数关联式,计算值与实验值的误差小于15％。     

流化床转鼓造粒器密封技术介绍

对大型引起设备流化床转鼓造粒器的密封技术结构及特点作了简要介绍,并与国内的常用结构进行比较分析。