Development of Dynamic Filter of Cone and Plate Type for Sweeping Filter Cake of Ultrafine Particles

扫除超细颗粒滤饼的锥板式动态过滤机的研制

• 批准号: 12555212
• 负责人: IRITANI Eiji
• 金额: $ 7.68万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555212/
• 关键词: Dynamic Filter; Cone and Plate Filter; Rotating Disk Filter; Ultrafine Particle; Cake Sweeping; Filter Cake; Membrane Filtration; Cakeless Filtration

In this study, microfiltration of oil-in-water emulsion was conducted using dynamic filter of cone and plate type, and the effects of various factors on filtration properties were investigated. The results are summarized as follows :1. The advantage of dynamic filter of cone and plate type was verified and high-speed filtration was resulted over the long-term periods due to the high sweeping performance of the dynamic filter.2. Dynamic filtration of the cone and plate type was conducted under various conditions, and the following conclusions were obtained :(1) For slurry forming highly compressible cake, it is of importance to optimize the applied pressure.(2) The increase in the rotating speed of cone leads to a remarkable increase in the filtration rate. However, the optimal rotating speed in combination with a reduction of the energy consumption must be taken into consideration.(3) The grooved cone plate enhances the turbulent flow in the filter chamber, and thus improves the filtration rate significantly.3. Two types of experiments were carried out. The filtration behaviors are investigated for both filtration without circulation of filtrate to the slurry tank, in which the concentration of slurry increases with time, and filtration with circulation of filtrate to the slurry tank so that the concentration of slurry could be maintained constant. It was found that the filtration rate of the former is smaller than the equilibrium one of the latter even though both filtration rates are compared at the same slurry concentration. In case of filtration with circulation, the siteady state is reached when the rate of cake formation is at equilibrium with the rate of cake removal, while in filtration without circulation, the pseudo-steady state in which the cake formation progresses gradually is retained all the time because of the increasing concentration. In this way, the difference in mechanism between these two types brings about the difference in filtration rate.

本研究采用锥板式动态过滤器对水包油乳液进行微滤，并考察了各种因素对过滤性能的影响。研究结果如下： 1．验证了锥板式动态过滤器的优势，由于动态过滤器的高清扫性能，实现了长期的高速过滤。 2．在不同条件下对锥板式进行动态过滤，得到以下结论：（1）对于形成高压缩滤饼的浆料，优化施加压力非常重要。（2）锥体转速的增加导致过滤速率显着增加。但必须考虑最佳转速与降低能耗的结合。(3)沟槽锥板增强了滤室内的紊流，从而显着提高过滤速度。3．进行了两种类型的实验。研究了不将滤液循环至浆料罐的过滤（其中浆料的浓度随时间增加）和将滤液循环至浆料罐的过滤的过滤行为，以使浆料的浓度保持恒定。结果发现，即使在相同浆料浓度下比较两种过滤速率，前者的过滤速率仍小于后者的平衡过滤速率。在有循环过滤的情况下，当滤饼形成速率与滤饼去除速率平衡时达到稳态，而在没有循环过滤中，由于浓度增加，始终保持滤饼形成逐渐进行的伪稳态。这样，这两种类型的机理差异就带来了过滤速度的差异。

项目成果

Iritani,E., Y.Mukai and Y.Toyoda: "Properties of Filter Cake Formed in Dead-End Microfiltration of Binary Particulate Mixtures"Journal of Chemical Engineering of Japan. 35-3. 226-233 (2002)

Iritani,E.、Y.Mukai 和 Y.Toyoda：“二元颗粒混合物死端微滤中形成的滤饼的性质”日本化学工程杂志。

E.Iritani: "Measurements and Evaluation of Concentration Distributions in Filter Cake Formed in Dead-End Ultrafiltration of Protein Solutions"Chemical Engineering Science. 57・1. 53-62 (2002)

E.Iritani：“蛋白质溶液死端超滤中形成的滤饼的浓度分布的测量和评估”化学工程科学57・1（2002）。

E.Iritani: "Purification of Secondary Municipal Wastewater by Microfiltration Using Ceramic Membrane"Proceedings of the 9th Asian Pacific Confederation of Chemical Engineering Congress. (CD-ROM). (2002)

E.Iritani：“使用陶瓷膜微滤净化二级城市废水”第九届亚太化学工程联合会大会论文集。

入谷英司: "圧縮性濾過ケークを形成するボディフィード精密濾過過程の解析"粉体工学会誌. 38・10. 710-717 (2001)

Eiji Iriya：“形成可压缩滤饼的本体进料精密过滤过程的分析”粉末工程学会杂志38・10（2001）。

入谷英司: "浄水および廃水処理における粒子・流体系分離"粉体工学会誌. 38・1. 25-34 (2001)

Eiji Iriya：“水净化和废水处理中的颗粒/流体系统分离”粉末工程学会杂志38・1（2001）。