共查询到19条相似文献,搜索用时 78 毫秒
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对碳酸钙(轻钙,重钙,纳米钙,专用钙等)的干燥及其有关设备的现状和发展作了回顾,并就轻钙、重钙、纳米钙等干燥效率的提高、设备的改进以及组合干燥的应用实际效果作了阐述。 相似文献
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褐煤水含量较高,限制了褐煤的应用范围。褐煤的脱水干燥是褐煤提质的关键步骤。文中综述了不同的褐煤干燥技术,并对其相对优点和局限性进行了讨论。 相似文献
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天然碱矿在世界上主要分布于三个较大的产区,即北美西部、亚州北部和非州东部.我国是天然碱资源丰富的国家,在亚州产区中占有举足轻重的地位.东起内蒙古自治区的呼伦贝尔盟和吉林省,向西南经内蒙锡林郭勒盟、乌兰察布盟、伊克昭盟和巴彦淖尔盟以及相邻的甘肃省和青海省,直至新疆维吾尔自治区的哈密、阿勒泰地区和塔克拉玛干沙漠,在这一横贯我国北部的辽阔地带的干旱和半干旱草原、荒漠和戈壁滩上,有数十处碱湖和碱滩盛产天然碱;地处中原的河南省地下蕴藏着天然碱矿;远至西南边 相似文献
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木材微波干燥的应用与研究动态 总被引:3,自引:0,他引:3
分析了木材微波干燥的机理和优点,介绍了国内外木材微波干燥的研究与应用情况,指出木材微波干燥是一项具有广阔发展前景的新技术。建议今后加强木材微波干燥理论、干燥设备、干燥工艺、微波联合干燥技术等的研究工作。 相似文献
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高纯度大豆粉末磷脂干燥技术的进展 总被引:1,自引:0,他引:1
磷脂是一种天然的表面活性剂,在食品、医药、化妆品等方面有广泛的应用。详细介绍了高纯度粉末磷脂制备工艺中干燥过程的研究进展。总结了真空干燥、超临界二氧化碳干燥、真空冷冻干燥、振动流化床干燥等六种干燥高钝粉末磷脂的方法进展,并提出了超临界二氧化碳干燥和真空冷冻干燥两种有效的高纯粉末磷脂干燥方法。 相似文献
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一氧化碳干燥技术及应用 总被引:3,自引:0,他引:3
本文阐述了光气生产中一氧化碳冷冻脱水-分子筛吸附的干燥技术,使得干燥后一氧化碳水份含量≤100ppm,提高了光气及光气化产品的质量和设备使用寿命,保证了光气安全生产。 相似文献
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论述了国内外褐煤干燥提质技术的发展现状。针对传统热力干燥在褐煤电厂应用中存在的高能耗、高投资和低安全性等问题,开展了褐煤过热蒸汽干燥机理的试验研究和中试试验。结果表明:过热蒸汽的干燥效果优于常规热空气;中试试验系统能稳定、连续地对褐煤进行干燥,且干燥产品符合褐煤干燥实际工业应用的要求。最后提出了过热蒸汽预干燥低质煤提质洁净煤技术(SCU技术),对其在节能、安全等方面的技术先进性作了具体的对比分析,结果表明:SCU技术节能节水、安全性高,符合中国可持续发展战略和节能减排的要求。 相似文献
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Rafael Oliveira Defendi Paulo Roberto Paraíso Luiz Mario de Matos Jorge 《Drying Technology》2017,35(1):125-137
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. 相似文献
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Jiapeng Huang 《Drying Technology》2016,34(8):900-911
The objective of this study was to compare the drying characteristics and quality of dried okra obtained by vacuum freeze drying (VFD), microwave vacuum drying (MVD), and pulse-spouted microwave vacuum drying (PSMVD). The quality parameters include color (L*, a*, and b*), texture (hardness and fracturability), shrinkage ratio (SR), nutrient retention (chlorophyll, flavonoids, and vitamin C), and sensory score was investigated. Vacuum freeze drying maximally preserved the original properties of samples. And the samples dried by PSMVD showed higher quality and more uniformity compared to MVD. Considering of all aspects comprehensively, such as cost-effectiveness, practicability, and scale-up, PSMVD was a promising technique which would match results obtained by vacuum freeze drying. 相似文献