大型盘式半焦干燥机的设计开发

主要介绍了大型盘式半焦干燥机的设计开发过程,重点阐述了大型盘式干燥机主要设计参数的选取要领和注意事项。开发出的大型盘式半焦干燥机填补了市场空白,促进了半焦生产企业升级转型,提高了其资源经济效益。     

PIA预干燥技术的开发和应用

以中国石油化工股份有限公司北京燕山分公司30kt／a PIA工业装置改造为依托,通过技术调研、试验研究、方案论证,成功开发了一种盘式桨叶预干燥机＋蒸汽管回转干燥机的组合干燥技术及专用型PIA盘式桨叶干燥机技术。     

盘式干燥机

盘式干燥机是一种借助传导间接加热金属盘面竖型连续干燥设备.介绍了盘式干燥机的性能、特点、工作原理、结构、工作参数及其在农药上的应用.     

江铜-瓮福400 kt/a硫酸装置硫精砂干燥系统改造

400 kt/a硫酸装置采用2台盘式干燥机干燥硫精矿,在试运行中出现设备处理能力达不到要求并且故障率较高的问题.为此,在盘式干燥机前增加2台内加热双螺旋干燥机进行预干燥,并对盘式干燥机进行相应的改造,以减少故障、便于维修.30 min的测试结果表明,硫精矿经过螺旋干燥机干燥后w(H2O)从11.5%降到8.5%,再经过盘式干燥机进一步降到约5%,完全可满足生产要求.     

改进型盘式干燥机在大流量矿粉干燥中的应用

介绍了传统盘式干燥机的基本结构,针对传统盘式干燥机的特点,对其盘板和耙叶结构作了进一步改进,使其满足大流量矿粉干燥的需求.     

盘式连续干燥器的耙叶设计探讨

在所有传导式干燥机中,盘式连续干燥器的有效加热面积最高,理论上可达100%,但如果耙叶设计与选择不当,将导致实际有效加热而积降低,有的共至低至50%以下,盘面上出现大最的裸露面积,严莆影响了盘式连续干燥器效能的正常发挥.通过理论分析和图形解析方法,给出了盘式十燥机耙叶设计的一些准则,可消除盘面的裸露面积,提高干燥机的综...     

旋转闪蒸干燥机在碳酸钡行业的应用

对旋转闪蒸干燥机的工作原理、结构特点进行了详细介绍，并将转筒烘干机和旋转闪蒸干燥机进行了对比，提出碳酸钡行业采用旋转闪蒸干燥机可以把碳酸钡的成本降到最低限度，而产品质量可以得到很大提高。旋转闪蒸干燥机也可用于碳酸锶、硫酸钡等粘性物料的干燥。     

小磷铵扩产的适宜能力

现有小磷铵装置可以扩大能力。磷酸工段扩大能力应以盘式过滤机的生产能力为基准，增加料浆冷却器和养晶槽之后使其能力达到3万吨／年P2O5。磷铵工段扩大能力应该以喷浆造粒干燥机的生产能力为基准，可以用高速氨化蒸盅器代替槽式中和器，将料浆加热器面积增至100m2／台，提高喷浆造粒干燥机进口温度，使其达到550～600℃，则尾气净化系统仍可使用，相应的磷酸一铵生产能力可以达到5～6万吨／年。     

盘式连续干燥器在氢氧化钡生产中的应用

介绍了应用于氢氧化钡干燥的盘式连续干燥器。阐述了该干燥器的工作原理及工艺流程,分析了这种干燥形式的特点及应用领域,并与传统的气流管干燥机进行了比较。结果表明,用于氢氧化钡的干燥,盘式连续干燥器优于气流管干燥机。     

旋转气流喷动干燥机在漂粉精干燥工艺上的应用

常规的盘式干燥机在干燥漂粉精中存在能耗大、粉尘多以及DCS的控制连续性等问题。阐述了旋转气流喷动干燥机的工作原理、特点及其部件设计方案,设计并制造了二叶后掠式旋转搅拌器、密封装置及其他辅助设备。通过试验证明了旋转气流喷动干燥机在漂粉精工业生产中替代盘式干燥机的可行性:可节省占地面积50%,节省设备投资10%,生产1t漂粉精的蒸汽消耗可节省1.28t,产品收率>98%。     

旋转闪蒸干燥器在碳酸钡干燥中的应用

介绍了河北诺达化工设备有限公司开发生产的旋转闪蒸干燥器代替回转圆筒干燥器在碳酸钡干燥过程中的应用.通过对投资、能耗、产品质量、环保效益的详细分析得出结论:用旋转闪蒸干燥器代替回转圆筒干燥器,具有节省投资,节约能耗,提高产品质量,减小环境污染等优势,为碳酸钡的干燥提供了一种新方法.该设备也适用于碳酸锶、硫酸钡、碳酸钙等滤饼类物料的干燥,同样对于冶金、化工、医药、食品等行业的滤饼类物料的干燥也具有极高的应用价值.     

Modeling the Fractional Drying and Aerodynamic Separation of Alfalfa into Leaves and Stems in a Rotary Dryer

A computerized mathematical model was developed to predict fractional drying and aerodynamic separation of alfalfa into leaves and stems in one process in a rotary dryer. Aerodynamic separation was characterized by separation efficiency or the total amount of the desired component (leaf or stem) recovered, relative to the amount entering the process, and by purity of leaf or stem component collected at exit ports of the dryer. The model development assumed 100% separation efficiency and purity. The model was validated by comparing model predicted results with measured experimental and field test data obtained from a small industrial rotary dryer and a full-scale industrial dryer. Changes in leaf, stem, and drying gas moisture contents and temperatures were measured and predicted by the model under various drying conditions. The model-predicted results agreed well with measured data. The model was also used to simulate the performance of industrial rotary dryers under various operating conditions. The model can be used to determine the optimum drying and aerodynamic separation parameters. It can also be used to design and redesign new and existing industrial rotary dryers in order to combine drying and aerodynamic separation into one process.     

Modeling the Fractional Drying and Aerodynamic Separation of Alfalfa into Leaves and Stems in a Rotary Dryer

A computerized mathematical model was developed to predict fractional drying and aerodynamic separation of alfalfa into leaves and stems in one process in a rotary dryer. Aerodynamic separation was characterized by separation efficiency or the total amount of the desired component (leaf or stem) recovered, relative to the amount entering the process, and by purity of leaf or stem component collected at exit ports of the dryer. The model development assumed 100% separation efficiency and purity. The model was validated by comparing model predicted results with measured experimental and field test data obtained from a small industrial rotary dryer and a full-scale industrial dryer. Changes in leaf, stem, and drying gas moisture contents and temperatures were measured and predicted by the model under various drying conditions. The model-predicted results agreed well with measured data. The model was also used to simulate the performance of industrial rotary dryers under various operating conditions. The model can be used to determine the optimum drying and aerodynamic separation parameters. It can also be used to design and redesign new and existing industrial rotary dryers in order to combine drying and aerodynamic separation into one process.     

新型干燥设备在硫精矿干燥中的应用

介绍了新型干燥设备双螺旋干燥机和盘式干燥机结构及其应用情况。与传统回转干燥机相比,新型干燥设备具有热效率高、干燥能力大、设备不易粘结、占地面积小、操作环境好、生产成本低等优点。该新型干燥设备在400kt／a硫铁矿制酸装置上的成功应用为我国硫精矿干燥提供了一条高效：节能、环保的新途径。     

Aerodynamic Separation and Fractional Drying of Alfalfa Leaves and Stems—A Review and New Concept

This article examines the state-of-the art on aerodynamic separation and drying of leaves and stems. Relevant aerodynamic and drying characteristics of alfalfa leaves and stems, important in the design and functional performance evaluation of appropriate drying and separation systems, are presented. General features and design parameters of rotary drum dryers are discussed. A new efficient approach to combined drying and separation in a rotary drum dryer is described in which fresh or pre-wilted alfalfa mixture is dried at a moderate temperature, and in the same operation the dry leaf fraction is aerodynamically separated from the stem fraction. Preliminary test data obtained from the dryer indicated that the separated product stream had comparatively high leaf purity, confirming the feasibility of the new approach.     

Aerodynamic Separation and Fractional Drying of Alfalfa Leaves and Stems—A Review and New Concept

Abstract

This article examines the state-of-the art on aerodynamic separation and drying of leaves and stems. Relevant aerodynamic and drying characteristics of alfalfa leaves and stems, important in the design and functional performance evaluation of appropriate drying and separation systems, are presented. General features and design parameters of rotary drum dryers are discussed. A new efficient approach to combined drying and separation in a rotary drum dryer is described in which fresh or pre-wilted alfalfa mixture is dried at a moderate temperature, and in the same operation the dry leaf fraction is aerodynamically separated from the stem fraction. Preliminary test data obtained from the dryer indicated that the separated product stream had comparatively high leaf purity, confirming the feasibility of the new approach.     

金隆蒸汽回转干燥机国产化改造实践简

金隆公司充分利用公司冷修期间对蒸汽回转干燥机进行了国产化改造,在对改造前蒸汽回转干燥机存在问题进行分析基础上,重点介绍了对干燥机的改造过程。改造后,蒸汽回转干燥机运行状况稳定,达到改造目的。     

粒状肥料专用回转式多筒烘干机

分析粒状钙镁磷肥采用传统单筒烘干机不能达到出口产品标准的原因,介绍将传统回转式单筒烘干机改造成回转式多筒烘干机的设备结构和使用效果。改造后的多筒烘干机可使颗粒肥产品粒度均匀,强度高,含水率低,成品率提高20~30百分点,特别适用于粒度1~5 mm产品的烘干。