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1.
微波辅助干燥技术的应用进展   总被引:1,自引:0,他引:1  
微波辅助干燥是一种比微波干燥更有优势、应用前景更广阔的干燥技术,它结合了微波干燥和传统干燥技术的诸多优点。主要阐述了微波辅助干燥的原理、特点以及在国内外的研究和应用现状,同时对该技术在陶瓷坯体干燥过程中的应用进行了分析。  相似文献   

2.
微波辅助干燥技术的应用进展   总被引:1,自引:0,他引:1  
微波辅助干燥是一种比微波干燥更有优势、应用前景更广的干燥技术,它结合了微波干燥和传统干燥技术的优点。本文主要阐述了微波辅助干燥的原理、特点以及在国内外的研究和应用现状。同时对该技术在陶瓷坯体干燥中的应用进行了分析。  相似文献   

3.
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   

4.
微波技术在蚕茧干燥中的应用研究   总被引:2,自引:0,他引:2  
微波干燥是近年来被广泛应用的一项新技术。在阐述微波干燥原理、特点及微波干燥蚕茧机理的基础上,就近年来微波技术在蚕茧干燥方面的应用研究及其进展作了综述,分析了微波干燥蚕茧应用研究中存在的问题,探讨了微波技术在蚕茧干燥方面的应用前景。  相似文献   

5.
微波技术在种子干燥方面的研究进展   总被引:2,自引:0,他引:2  
干燥是种子加工的重要环节,微波干燥技术具有独特的优点和特点。近十几年来,国内外在种子微波干燥方面的研究取得了不少成果,而有关这方面的综述却未见报道。本文在阐述微波干燥机理和特点基础上,就近年来国内外微波技术在种子干燥方面的研究进展作一综述,并探讨微波技术在种子干燥方面的应用前景。  相似文献   

6.
果蔬微波联合干燥技术研究进展   总被引:3,自引:0,他引:3  
介绍了微波干燥的原理和特点,综述了果蔬微波联合干燥技术的研究进展,主要涉及到微波干燥与其它干燥技术联合在果蔬干燥中的应用。  相似文献   

7.
潘焰琼  卓小芬 《广东化工》2013,40(17):117-118
文章主要介绍了微波的原理,微波干燥技术的特点。归纳了微波干燥与及微波相关的联合干燥等方法在食品工业中的最新应用,并对微波干燥在食品工业中的应用前景进行了展望,旨在为今后的微波干燥工业发展提供指导意义。  相似文献   

8.
微波真空组合干燥技术的研究   总被引:1,自引:0,他引:1  
微波真空干燥是综合微波干燥和真空干燥各自优点的一项新技术,将微波干燥的快速高效性和真空干燥的低温高质相结合,在真空条件下利用微波对物料进行干燥处理,从而实现物料的快速低温干燥。着重阐述了微波真空组合干燥技术的机理、特点、干燥动力学以及影响微波真空干燥的重要因素,并对微波真空组合干燥的应用研究进行了介绍。  相似文献   

9.
微波干燥浮选精煤   总被引:4,自引:0,他引:4  
探讨了微波干燥浮选精煤的原理,通过实验确定了影响微波干燥浮选精煤的主要因素:微波有效的输出功率;浮选精煤的外在水分;微波干燥的处理能力及干燥时间等。论证了以微波技术替代传统的火力干燥方法在选煤工业上应用的可行性。  相似文献   

10.
我国微波干燥技术应用研究进展   总被引:12,自引:0,他引:12  
阐述了微波干燥技术的特点,对我国微波干燥技术在食品工业、材料化工、医药工业、矿产开采业、陶瓷工业、实验室分析、湿天然橡胶加工等方面的应用研究现状进行了综述:特别是对我国微波干燥技术在取代传统的燃烧柴油、燃烧煤、燃烧木材等方式为手段产生的热空气为介质,干燥湿天然橡胶的研究进展进行了详细阐述;同时对我国微波干燥技术的应用前景尤其在湿天然橡胶干燥加工中的应用前景进行了展望,并对我国微波干燥技术目前存在的问题及究方向作了预测分析。  相似文献   

11.
《Drying Technology》2013,31(8):2063-2079
A new drying method of combined superheated steam and microwave drying is being proposed. The drying rates of sintered glass beads in combined superheated steam and microwave drying are experimentally and theoretically investigated. Drying experiments have been carried out in a waveguide where a standing wave is formed to uniformly heat a small sample. Concerning drying rate curves in combined superheated steam and microwave drying, a distinct constant rate period has been observed. For the falling rate period, high drying rates have been observed. For both periods, the drying rates in combined superheated steam and microwave drying are higher than those in superheated steam alone. Also, in comparison with the results of combined nitrogen and microwave drying, the normalized drying rates in combined superheated steam and microwave drying are higher than those at less than the critical moisture content in combined nitrogen and microwave drying. Moreover, theoretical drying rates for the falling rate period (predicted by a modified receding evaporation front model) in combined superheated steam and microwave drying, are in good agreement with the observed drying rates. The combined superheated steam and microwave drying method can attain higher drying rates under mild external conditions.  相似文献   

12.
干燥预处理对油页岩的利用具有重要的意义,微波干燥是一种快速、高效和节能的干燥方式。在家用微波炉改造基础上搭建了微波干燥实验台,研究了不同微波功率对柳树河油页岩微波干燥特性的影响。并采用单项扩散模型等13个薄膜干燥模型等对微波干燥分别进行动力学分析,结果表明:微波干燥所需的时间远小于传统干燥所需的时间;微波干燥速率要远大于传统干燥干燥速率;油页岩微波干燥过程适用于双项扩散的半经验模型,油页岩微波干燥机理为湿分(液体或蒸气)双项扩散控制过程;300、400和550 W三个功率干燥时能耗相差不大。为了以较少的能耗达到相同的干燥效果,对于柳树河油页岩,以功率550 W干燥为佳。  相似文献   

13.
Microwave convective drying of plant foods is a promising process due to the shorter drying time and better product quality. High microwave power decreases the drying time but causes charring of the product. In this work, microwave drying under constant and variable microwave power were compared. Temperature-sensitive products, such as plant foods, are especially affected by microwave power during the final drying period. Therefore, drying at variable microwave power was found to be a more suitable drying process. Air (temperature and velocity) has an important role during microwave drying, not only as carrier of evaporated moisture but also as it contributes to a more homogeneous and faster drying.  相似文献   

14.
《Drying Technology》2007,25(7):1149-1153
Microwave convective drying of plant foods is a promising process due to the shorter drying time and better product quality. High microwave power decreases the drying time but causes charring of the product. In this work, microwave drying under constant and variable microwave power were compared. Temperature-sensitive products, such as plant foods, are especially affected by microwave power during the final drying period. Therefore, drying at variable microwave power was found to be a more suitable drying process. Air (temperature and velocity) has an important role during microwave drying, not only as carrier of evaporated moisture but also as it contributes to a more homogeneous and faster drying.  相似文献   

15.
本文利用微波干燥法进行卫生陶瓷坯体干燥试验,探究微波可以实现对卫生陶瓷快速干燥的原因。在此基础上,对围绕着微波设备大型化、连续化中面临的关键技术及微波干燥电耗相对较高等技术进行攻关,开发了卫生陶瓷微波干燥辊道窑,并在实际工厂使用。结果表明:微波干燥过程实现了沿坯体纵向与沿坯体局部区域横向的均匀干燥及微波干燥能显著提高干燥的内扩散速率,最终实现对卫生陶瓷的快速干燥;采用微波、热风耦合加热技术能显著降低微波干燥电耗;开发的卫生陶瓷微波干燥辊道窑,可极大缩短干燥周期,降低场地占地面积,提高干燥合格率。  相似文献   

16.
针对玉米热风干燥中存在的问题。运用自制的微波干燥试验设备。采用不同的质量比功率和加热时间及配套的工艺流程。研究了玉米微波干燥特性及干燥条件对干燥品质、能耗的影响;分析了微渡干燥玉米过程中单位质量功耗、温度、平均失水速率与玉米籽粒发芽率、爆腰率和淀粉得率的关系;确定了影响微波干燥玉米的工艺参数和玉米微波干燥的合理工艺流程。研究结果表明:玉米微波干燥主要处于恒率干燥阶段,应用微波技术既能快速而经济地对玉米籽粒进行干燥,又能保持其种用价值,且有利于改善其品质。  相似文献   

17.
Drying of biological materials such as fruits and vegetables provides shelf-stable commodities ensuring food security and ease of distribution. There exists numerous drying processes available for the adequate drying of bio-materials. Applying microwave energy to a drying process provides an efficient means of transferring energy for moisture removal. A review of recent microwave assisted drying applications is presented here along with research results on drying of carrots under varying microwave power modes and the comparative drying of mushrooms by microwave/convection and microwave/vacuum.  相似文献   

18.
The impact of microwave drying on the quality of dried wood remains unclear. Particular attention should be paid in order to optimize the combined microwave and convective drying process. In this study, a comprehensive internal heat and mass transfer model was developed and numerically implemented in order to simulate and understand the physical phenomena occurring inside Jack pine wood during a combined microwave and convective drying process. The model was validated on the basis of the average moisture content curves for drying scenarios at various microwave power levels. According to the simulations results, an increase in microwave power significantly decreases the drying time of Jack pine wood and increases its internal gas pressure, which increases the risk of cracking. However, compared to purely conventional convective drying, combined microwave and convective drying at medium microwave power and air temperature significantly reduces the drying time and maintains the internal gas pressure at reasonable values. At these conditions, the risk of cracking will be diminished. This last result was checked via experimental measurements of the sample strength dried at different microwave power levels. From this study, we can consider that for Jack pine wood, combined microwave and convective drying is a more efficient technology compared to classical convective drying.  相似文献   

19.
马爱元  郑雪梅  袁杰 《化工进展》2021,40(2):1077-1084
湿法炼锌产出的中和沉铁渣作为重要的二次资源,含有大量的铁、锰、锌等有价金属,具有较高的综合回收利用价值。回收有价金属前需对中和铁渣进行脱水预处理,基于回转窑干燥法存在干燥时间长、干燥效率低、二次污染等问题,本文开展了微波干燥湿法炼锌中和铁渣实验研究,考察了微波功率、物料量对中和铁渣温升行为的影响,表明微波干燥湿法炼锌中和铁渣是可行的;实验考察了微波功率、物料量和干燥时间对中和铁渣脱水率的影响。研究结果表明:在一定程度上,中和铁渣脱水率与干燥时间和微波功率成正比,与物料量成反比。实验控制微波功率为1000W、物料量为50g、微波干燥时间为9min时,中和铁渣脱水率达98.55 %;X射线衍射、红外光谱分析展示微波干燥中和铁渣自由水脱除较为完全,但仍含有部分的结晶水;扫描电镜分析显示微波干燥较常规干燥更为均匀;与常规干燥工艺相比,微波干燥具有干燥时间短、水脱除率高、干燥均匀、清洁无污染等优势。  相似文献   

20.
进行了耐火浇注料热重分析,热风和微波干燥实验研究,得到了浇注料热风和微波干燥特性曲线。实验结果表明,与热风干燥比较,微波加热极大地降低了耐火浇注料干燥时间、提高了干燥效率和能源效率高,在耐火浇注料干燥过程中有着广阔的应用前景。  相似文献   

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