SELECTIVE DRYING OF MULTICOMPONET SOLVENTS IN MOLDED MEDIA HEATED BY MICROWAVE UNIFORMED WITH CONDUCTIVE PARTICLE FLUIDIZATION

通过微波加热和导电颗粒流化均匀的模制介质中多组分溶剂的选择性干燥

• 批准号: 12650749
• 负责人: ITAYA Yoshinori
• 金额: $ 2.05万
• 依托单位: NAGOYA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650749/
• 关键词: MICROWAVE HEATING; SELECTIVE DRYING; MULTI COMPONENTS SOLVENT; CONDUCTIVE PARTICLE; UNEQUILIBRIUM; AZEOTROPIC DISTILLATION; GAS LIQUID EQUILIBRIUM; QUANTUM ENERGY; 共沸混合液

The present research proposed a noble technique to make the electromagnetic filed of microwave uniform by introducing fluidized beds of electrically conductive beads. The technique was applied to advanced, rapid and selective drying of molded ceramics and foods, and the performance was evaluated by a fundamental examination. It is generally known that the motion of particles in fluidized bed behaves remarkably randomly. If electrically conductive beads are chosen for the fluidized particles, microwave is reflected on the surface of the beads toward a random direction and uniformity of the time-averaged profile of the field will be improved. On the other hand, the effect of the internal heat of microwave may enhance the internal migration of moisture in wet media. Microwave has also a specific feature so that the induced heat performance is dependence on the electromagnetic properties of solvent. Water absorbs effectively the microwave energy with the frequency 2.45 GHz, which is in har … More mony with the rotation quantum energy of water molecule and excites actively the energy level. This performance may achieve a unequilibrium state between gas and liquid by quantum excitation of molecules absorbing effectively the microwave energy. It is considered that selective evaporation and drying of multi component solvents will be possible by this effect.In this work, the influence of internal heating on the behavior of drying-induced strain-stress and deformation of ceramics molded into a slab as well as the drying characteristic is preliminarily investigated theoretically. The effectiveness is confirmed. The interaction between fluidization motion of conductive beads and microwave field profile was examined. The uniformity of the profile was improved successfully rather than disturbance of microwave energy using the conventional fan. Microwave drying of kaolin molded into a slab showed a different behavior from the drying characteristic by hot air heating, and it made the drying completion time short without crack formation. In addition, distillation examination was performed for a representative two components solvent of water and 2-propanol heated by microwave. It is confirmed that water evaporates somewhat more selectively than the equilibrium composition in the vapor. Less

本研究提出了一种通过引入导电微珠的流态化来使微波电磁场均匀的高贵技术。该技术被应用于模塑陶瓷和食品的高级、快速和选择性干燥，并通过基础试验对其性能进行了评价。众所周知，颗粒在床层中的运动具有明显的随机性。如果选择导电微珠作为流态化粒子，微波在微珠表面的反射方向是随机的，场的时间平均分布的均匀性将得到改善。另一方面，微波内热的作用可以增强湿介质中水分的内迁移。微波还具有一个特殊的特性，即感应热性能取决于溶剂的电磁性质。水有效地吸收了频率为2.45 ghz的微波能量，这在哈尔…。更多地与水分子的转动量子能相协调，并活跃地激发能级。这种性能可以通过有效地吸收微波能量的分子的量子激发来实现气液之间的非平衡态。本文从理论上初步研究了内加热对板坯陶瓷的干燥应变-应力和变形行为以及干燥特性的影响。其有效性得到了证实。考察了导电珠的流态化运动与微波场分布之间的相互作用。采用常规风扇，在没有微波能量干扰的情况下，成功地改善了型面的均匀性。高岭土模压板材的微波干燥表现出与热风加热干燥不同的特性，干燥完成时间短，不会产生裂纹。此外，还对一种具有代表性的水和异丙醇双组分溶剂进行了微波加热蒸馏实验。研究证实，与蒸汽中的平衡成分相比，水的蒸发更有选择性。较少

项目成果

Y.Itaya, K.Okouchi, S.Mori: "Effect of Heating Modes on Internal Strain-Stress Formation during Drying of Molded Ceramics"Drying Technology. 19・7. 1491-1504 (2001)

Y.Itaya、K.Okouchi、S.Mori：“加热模式对模制陶瓷干燥过程中内部应变应力形成的影响”干燥技术 19・7 (2001)。

J.Kobayashi,Y.Itaya,H.Matsuda and M.Hasatani: "Drying Behaviour of ZrOCl_2 Solution Droplet in ZrO_2 Fine Particles Production by Spray Pyrolysis"Bulletin of the Polish Academy of Sciences Technical Sciences. 48・3. 383-397 (2000)

J.Kobayashi、Y.Itaya、H.Matsuda 和 M.Hasatani：“喷雾热解法生产 ZrO_2 细颗粒中 ZrOCl_2 溶液液滴的干燥行为”波兰科学院技术科学通报 48・3。 2000）

Y.Itaya, K.Okouchi, S.Mori: "Effect of Heating Modes on Internal Strain-Stress Formation during Drying of Molded Ceramics"Drying Technology. 19(7). 1491-1504 (2001)

Y.Itaya、K.Okouchi、S.Mori：“加热模式对模制陶瓷干燥过程中内部应变应力形成的影响”干燥技术。

Y. Itaya, K. Okouchi and S. Mori: "Effect of Heating Modes on Internal Strain-Stress Formation during Drying of Molded Ceramics"Drying Technology,. 19-7. 1491-1504 (2001)

Y. Itaya、K. Okouchi 和 S. Mori：“加热模式对模制陶瓷干燥过程中内部应变-应力形成的影响”干燥技术，。

Erwin F.Cabrido,Y.Itaya and S.Mori: "Determination of Population Inversion in Microwave-Enhanced Combustion of Methane-Air Mixture in Ceramic Burner"Journal of Chemical Engineering of Japan. 34・1. 87-90 (2001)

Erwin F.Cabrido、Y.Itaya 和 S.Mori：“陶瓷燃烧器中甲烷-空气混合物微波强化燃烧中粒子数反转的测定”日本化学工程学报 34・1（2001 年）。