百度试验法测杨木干燥基准的初步研究

通过100℃干燥试验法的试验对2cm厚的四种杨木木材干燥特性进行了研究和分析．获得了杨木的基本干燥特性数据。同时。此法补充了观测干燥速度和扭曲的内客。较为完整和便于应用。实验结果表明，杨木属易干木材。少裂，但翘曲严重。参照百度试验缺陷等级以及干燥缺陷对应的干燥条件拟定了初步的干燥基准，在生产中可供参考使用。     

磷酸二氢钠转化为酸式焦磷酸钠的干燥试验研究

针对磷酸二氢钠转化为酸式焦磷酸钠的特点，提出使用转鼓干燥机与桨叶干燥机结合的方法对磷酸二氢钠进行干燥脱水，并进行了试验验证。在试验条件下，干燥过程中物料没有出现团聚和粘结现象，结片及干燥效果良好。干燥后，物料为粉末状且含水量低于0.1%。     

远红外线在牙膏软管干燥中的初步应用

一九七七年九月，我们通过对远红外线幅射加热干燥性能的学习，利用一个旧的电烘箱。装上两块远红外碳化硅板，进行牙膏软管油墨干燥试验。经过多次试验，反复摸索，终于掌握了一系列试验数据。后利用国庆节休假日，装好一台牙膏软管远红外干燥烘道。     

ZKY-01型箱式木材真空干燥机及干燥工艺的试验研究

介绍了ZKY-01型箱式木材真空干燥机的结构，采用浮压手段对榆木和酸枝木进行真空干燥试验。试验结果表明，ZKY-01型箱式木材真空干燥机的干燥效果与常规干燥相比，干燥速度大大提高，其干燥时间仅为常规干燥时间的15％左右；干燥质量好，没有发生端裂、表裂与变形等干燥缺陷；被干锯材的应力试片其齿条基本通直，应力指标为0．42％-0．76％。箱式木材真空干燥机具有一定的发展潜力。     

胡萝卜微波真空干燥试验研究

以胡萝卜为原料，采用均匀设计对微波真空干燥的微波功率、干燥温度及料层厚度进行试验研究，分析各试验条件下的水分含量及胡萝卜素含量，得到了干燥曲线和胡萝卜素保有量曲线，得出了胡萝卜失水量、胡萝卜素含量与各因素之间的回归方程，可用于描述胡萝卜的微波真空干燥特性。     

流化床干燥玉米数学模型的讨论

对流化床干燥玉米的试验数据进行了理论分析，利用Page方程和扩散方程拟合试验数据，得到了流化床干燥玉米的数学模型，并将两种模型进行了分析比较。     

远红外干燥法快速测定矿石中水分的研究

目的：建立远红外干燥法快速测定矿石中水分的分析方法。方法：以光波水分测定仪为试验设备，探讨不同加热温度、样品重量、干燥时间等试验条件对远红外干燥法快速测定矿石中水分分析的影响，确定测定矿石中水分远红外干燥法的最佳条件。结果：在加热温度为105～107℃、称样量为(110±5)g、干燥时间为110min下进行矿石中水分试验，试验结果表现良好，运用F检验法与t检验法对准确度进行检验，符合分析要求。结论：该法测定矿石中水分，自动化程度较高，放样后自动测出结果，操作简单，实现了样品的快速自动检测，大大提高了干燥效率，能更好的满足日常检测工作需要。     

微波在吸滤式过滤干机上的应用研究

本文以过滤、干燥装置一体化研究开发为基础，为进一步提高装置干燥效率，缩短干燥时间，引入了微波技术在过滤干燥装置上应用的研究。对各种干燥方式的独立试验以及协同试验的效果进行了定量比较，同时对微波技术在过滤干燥机上的应用还作了技术与经济分析，并对将来的实用化作了预测。提出了微波技术在过滤干燥装置上以及其它领域的应用有待进一步研究开发的共同课题。     

CTA中空纤维反渗透膜的远红外辐射干燥

本文介绍了三醋酸纤维素（ＣＴＡ）中空纤维反渗透的远红外辐射干燥试验结果及其设备的结构特点，试验结果表明，ＣＴＡ中空纤维反渗透膜远红外辐射干燥可提高其脱盐率，探索最佳干燥条件有可能简化中空纤维反渗透组的生产过程或进一步提高中空纤维反渗透组件的性能。     

不粘煤的微波－对流干燥研究

从不粘煤的特性出发，讨论了不粘煤工业干燥的要求；从微波－对流综合干燥传热传质原理分析，论证了这种干燥方式用于不粘煤干燥，在降低温度、控制负荷、提高经济性等方面都有显著成效，并以翔实的试验数据为理论分析作了辅证。     

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%。     

Staubarme Pulver durch Sprühtrocknen – Erfahrungen mit neueren Techniken

Dustless powders by spray drying – Experience with new techniques . Old drying plant with rotary- or nozzle-atomizer of conventional construction produce more or less fine, dusty powder. Increasingly, there is a demand for dustless powders. A knowledge of the parameters which influence the size of the particles and the experience gained in the drying of various products was the basis for the evolution of a new spray dryer capable of producing even dustless powder. Many trials in this new spray dryer, called the FSD (Fluidized Spray Dryer) show that the powder meets all requirements. Moreover, this spray dryer will save energy and is more gently to the product by working at lower outlet temperatures.     

FULL CONTAINMENT SPRAY DRYING

ABSTRACT

Aspects of safety, environmental protection, and powder quality will continue to influence advances within spray dryer design and operation, and the concept of full containment spray drying offers a means to meet future industrial requirements. Process air recycle and powder containment within the drying chamber leads to no process air discharge to atmosphere, provides a more favorable operator environment around the spray dryer installation, reduces regions within the dryer layout where potential explosive powder/air mixtures can exist, improves yields, reduces powder losses, and provides easier cleaning operations with reduced wash water requirements.     

园盘干燥器在磷酸盐工业上的应用

园盘干燥器是一种高效的微细粉连续干燥装置。本文介绍了园盘干燥器的干燥过程、设备结构、工程设计和在磷酸盐生产中的应用。     

藕粉在旋流干燥器中的干燥动力学研究

实验研究了藕粉在旋流干燥器中不同操作参数下(进风温度50～80℃、气速1.5～3.5 m/s、进料速率0.001 7～0.002 7 kg/s)的干燥速率,建立了藕粉在旋流干燥器中的干燥动力学模型:U=a+bX+cX~2+dX~3,并进行了模型验证。结果表明该经验模型在一定因素水平范围内具有比较好的精度,研究结果对旋流干燥工艺参数的选择和旋流干燥器的设计有一定的参考价值。     

Powder Properties and System Behavior during Spray Drying of Bauhinia forficata Link Extract

This article presents a study of the effects of the spray-drying conditions on product properties and dryer performance during manufacture of dried extracts of Bauhinia forficata. The product properties (loss on drying of the dried extract, flavonoids degradation ratio, product size distribution, bulk and loose densities, powder morphology) and the equipment performance were determined as a function of the input parameters (dryer inlet temperature, ratio between the feed flow rate of the extract to the dryer evaporation capacity, and feed flow rate of the drying gas). Regression equations correlating powder characteristics and dryer behavior to input process parameters were obtained. The results demonstrate significant impact of the processing conditions on product properties and dryer performance. The loss on drying is a key property, since low values are demanded for the acceptance of the dried extract. In general, due to strict product specifications, the drying conditions that give an end product with the required quality are not associated with the optimal drying performance.     

A Novel Way to Measure the Concentration of a Spray in a Spray Dryer

A new experimental technique to capture milk concentrate droplets from inside a 150-kg powder/h pilot spray dryer is presented. The technique uses liquid nitrogen to capture the droplets in the dryer and to preserve their moisture content. The droplets are kept frozen until the moisture content can be measured. This technique can be applied to sample the sprays from any semi-commercial-scale spray dryer or similar apparatus.     

Powder Properties and System Behavior during Spray Drying of Bauhinia forficata Link Extract

This article presents a study of the effects of the spray-drying conditions on product properties and dryer performance during manufacture of dried extracts of Bauhinia forficata. The product properties (loss on drying of the dried extract, flavonoids degradation ratio, product size distribution, bulk and loose densities, powder morphology) and the equipment performance were determined as a function of the input parameters (dryer inlet temperature, ratio between the feed flow rate of the extract to the dryer evaporation capacity, and feed flow rate of the drying gas). Regression equations correlating powder characteristics and dryer behavior to input process parameters were obtained. The results demonstrate significant impact of the processing conditions on product properties and dryer performance. The loss on drying is a key property, since low values are demanded for the acceptance of the dried extract. In general, due to strict product specifications, the drying conditions that give an end product with the required quality are not associated with the optimal drying performance.     

Spray Drying of Chicken Meat Protein Hydrolysate: Influence of Process Conditions on Powder Property and Dryer Performance

The influence of operational conditions of a spray dryer on powder properties and equipment performance during spray drying of chicken meat hydrolysate was evaluated by a central composite rotatable design. The independent variables were inlet air temperature (120 to 200°C) and feed flow (0.1 to 0.38 kg/h). Spray dryer performance was assessed through estimation of product recovery, outlet air temperature, thermal efficiency, and energy on the dryer, obtained by mass and heat balance in the dryer system. Powder property was characterized in respect to antioxidant activity. The stable free radical diphenylpicrylhydrazyl (DPPH) was used to estimate the antioxidant activity of protein hydrolysate powder. This response varied from 38.7 to 59.4% and was only affected by inlet air temperature. Moreover, the results demonstrate a significant effect of the processing conditions on dryer performance. The increase of feed flow results in higher thermal efficiency and lower energy on dryer. Higher product recovery values were obtained at lower inlet air temperature and feed flow.     

A Novel Way to Measure the Concentration of a Spray in a Spray Dryer

A new experimental technique to capture milk concentrate droplets from inside a 150-kg powder/h pilot spray dryer is presented. The technique uses liquid nitrogen to capture the droplets in the dryer and to preserve their moisture content. The droplets are kept frozen until the moisture content can be measured. This technique can be applied to sample the sprays from any semi-commercial-scale spray dryer or similar apparatus.