多层水平气流带式干燥机的数学模型

根据干燥传质传热学原理和干燥动力学特性，建立了水平气流带式干燥机干燥过程的数学模型。该模型可以预测干燥机合理的通风道高度、带翻转最佳时间和热风风速等。为优化多层带式干燥机的结构或设计新的水平气流带式干燥机提供了理论依据。     

关于干燥装置的探讨

对干燥装置近两年来的最新技术；内热流化干燥机、离心流化干燥机过热蒸汽干燥机作了介绍；然后阐述了干燥装置选型的一般原则和选购方法；最后用热空气为干燥介质的干燥装置为例，分析了干燥装置用能的环境负荷问题。     

GKG型高效快速干燥机

ＧＫＧ型高效快速干燥机由化工部沈阳化工研究院研制成ＧＫＧ型高效快速干燥机，将喷动干燥技术、流化干燥技术和旋流干燥技术三者相结合，使整个床层物料处于良好的喷动、旋流、循环运动状态。该干燥机技术指标。１．生产能力为流化床干燥机的２—５倍。为闪蒸干燥机的１...     

适用于塑木等多种用途的高效红外干燥机

德国Kreyenborg公司推出其拥有专利权的红外干燥机（IRD）技术而生产的干燥机，发射的红外线能干燥湿敏性树脂，效率高于热空气干燥机和干燥空气干燥机，原则上可干燥所有连续输送的聚合物。     

推出全新设计的Maguire VBD干燥机

美奎产品有限公司（以下简称“美奎”）推出了全新设计的扣叶脂干燥机，其运行性能比以往的真空系统更简单、更可靠，此外与除湿干燥机相比，可进一步大幅缩短干燥时间并降低能耗。该树脂干燥机体现了真宅干燥概念的巨大进步。     

笼形粉碎干燥机在膏糊状无机盐物料中的应用

介绍了新干燥设备—竖式笼形粉碎干燥机的结构、特点、性能，以及该干燥机对白炭黑等膏糊状物料的干燥试验结果。对白炭黑滤饼干燥的工业化应用取得了成功。     

笼形粉碎干燥机有膏糊状无机盐物料中的应用

介绍了新干燥设备－坚式笼形粉碎干燥机的结构、特点、性能，以及该干燥机对白炭黑等膏糊状物料的干燥试验结果。对白炭黑滤饼干燥的工业化应用取得了成功。     

多层振动流化床干燥机工作原理及特点

多层振动流化床干燥机是化工产品干燥的一种新型设备，是单层流化床干燥机的一种改进形式。这种干燥机在干燥箱结构，孔板结构及调整等方面，比以往干燥设备具有极大改进。本文从振动和风力两个角度出发，着重介绍了这种干燥机的工作原理，物料的运动情况和干燥过程，明确分析了它的特点和应用。     

多层振动流化床干燥机工作原理及特点

多层振动流化床干燥机是化工产品干燥的一种新型设备，是单层流化床干燥机的一种改进形式。这种干燥机在干燥箱结构，孔板结构及调整等方面，比以往干燥设备具有极大改进。本文从振动和风力两个角度出发，着重介绍了这种干燥机的工作原理，物料的运动情况和干燥过程，明确分析了它的特点和应用。     

桨叶干燥机在一水硫酸镁生产中的应用

介绍了桨叶干燥机的结构原理，分析了干燥机在一水硫酸镁生产过程中出现故障的原因，指出桨叶干燥机应用于一水硫酸镁干燥中的优点。     

热敏性物料干燥实验研究

根据聚碳酸酯产品的热敏性要求,对干燥工艺进行了分析研究,设计流化床干燥系统。实际应用表明,流化床系统具有产品质量符合要求、干燥效果好、操作使用方便等优点。     

Optimization study of soybean intermittent drying in fixed-bed drying technology

Intermittent drying of materials is an alternative operation that aims at reducing energy consumption, improve the preservation of dried products or decrease effective drying time. Intermittent drying supplies the system with time-varying input air properties that are opposite to traditional operations, where air properties are constant at the dryer inlet. The major objective of this study is to establish the most satisfactory patterns of air temperature and velocity modulation at the dryer entrance to reduce energy consumption. This optimization study was based on a heterogeneous model for the drying of grains in fixed bed validated with experimental data. Intermittent and conventional operation experiments were conducted using equal energy consumption, and the influence of air temperature and velocity modulation on the drying rates related to the percentage of evaporated water were assessed. Results indicated that higher drying rates can be achieved under intermittent operation, and the validated model based on these results could reasonably predict temperature and moisture content profiles. Simulations pointed out that the best modulation patterns of air properties is a function of a variety of system conditions such as initial temperature and moisture content of both soybean and drying air. However, a tendency to reduce energy consumption was observed when the system operation is initially at high temperature and constantly at low velocity.     

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。     

新型干燥工艺在间苯二甲酸生产中的应用

介绍了新型组合干燥工艺在间苯二甲酸生产中的应用,重点阐述了桨叶干燥机-蒸汽管回转干燥机的工艺流程及干燥设备,分析了组合干燥工艺的特点。新系统投用后的一年内,没有物料堵塞和黏壁现象发生,未因干燥机碱洗造成COD超标,装置负荷率由80%提高到100%。     

Secondary coal recovery from slurry ponds utilizing solar drying

The drying of moist, fine coal waste was experimentally studied using an indoor batch dryer with a constant-radiation heat source. The effect of air velocity and radiation level on the coal drying rate was investigated and an analytical correlation obtained. Outdoor direct solar drying of coal waste was studied in a 3.1 m² dryer. The solar dryer was able to dry coal at a rate of about 14 kg of coal per day per square metre of solar collector area. The simple pay-back period for such a system is between 2.5 to 5 years.     

Performance evaluation of parabolic greenhouse-type solar dryer used for drying of cayenne pepper

Abstract

This study examines the performance of a parabolic greenhouse-type solar dryer used for drying of cayenne pepper (Capsicum annuum) in Nan (northern Thailand). The dryer has a base area of 6.0?m × 8.2?m and a height of 3.25?m with the loading capacity of 100–200?kg for fruit or vegetables. It has a parabolic roof structure covered with polycarbonate sheets and is placed on a concrete floor. It is ventilated by three DC fans powered by a 50-Watt solar cell module. The produce is placed on trays with wire mesh base and located on steel supports. Among the advantages of this type of dryer is that the product is protected from rain, dust and insects. The pepper samples consisted of whole pods or cut pods. The drying experiments were carried out in the solar dryer and in an electrical (convective) tray dryer. The study was focusing on drying kinetics and on the effects of the drying treatments on one of the main quality attributes namely the capsaicin content in the dried products.     

选煤厂煤泥干燥系统的改造

针对铁煤集团大兴矿选煤厂煤泥干燥系统存在的问题,从压滤机系统、905煤泥转载皮带输送机、滚筒干燥机、干燥机出口刮刀、干燥机电机、925粉煤输送带6个方面对选煤厂进行技术改造。改造后,选煤厂工艺指标达到预计目标,生产环节畅通,降低了维护工作量,新增经济效益765.05万元。     

Three-dimensional modelling of pneumatic drying process

Steady-state three-dimensional calculations of heat and mass transfer in vertical pneumatic dryer were performed. The theoretical model of the drying process is based on two-phase Eulerian-Lagrangian approach for gas-particles flow and incorporates advanced drying kinetics for wet particles. The model was utilized for simulation of the drying process of wet PVC and silica particles in a large-scale vertical pneumatic dryer. The influence of wall thermal boundary conditions was investigated by assuming either known value of the wall temperature or adiabatic flow in the dryer. Analyzing the predicted particle drying kinetics, an uneven product quality was predicted due to non-uniform drying conditions in the central and peripheral zones of the pneumatic dryer. Moreover, for the case of non-insulated chamber walls such quality unevenness was estimated to be substantially greater than for the case with thermally insulated drying chamber. The examination of the predicted temperature profiles within the silica and PVC wet particles showed that the latter is subjected to higher temperature gradients potentially resulting in the greater rate of thermally-degraded final product.     

污泥干化系统工艺运行总结

如何提高污泥干化设备的有效运转率,解决浆叶轴干燥机运行中遇到的干燥能力不足、浆叶轴堵转、无轴螺旋频繁断裂等诸多问题。通过介绍污泥干化工艺系统,总结了运行中的各种问题及解决方法。     

组合干燥的应用及进展

组合干燥可以干燥某些单一干燥方法难以干燥的物料。组合干燥的应用不仅可以节约能源,而且可以较好地控制整个干燥过程,有助于获得高质量的产品。文章介绍了组合干燥的现状及其进展,并结合实例对组合干燥的应用特点进行了讨论。