巻号一覧
前身誌
48 巻, 4 号
選択された号の論文の4件中1～4を表示しています
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田原 隆志, 院去 貢, 今城 祐二, 奥山 喜久夫2011 年 48 巻 4 号 p. 198-205
発行日: 2011/04/10
公開日: 2011/04/25
ジャーナル フリーWe have developed new type of beads mill for the low energy dispersion of nanoparticles in liquids. This new beads mill has dual rotating axes in the vessel where the separator and rotor pin can works independently. In this machine the separator works the steadily stable separation of the dispersed nanoparticles from the beads at a high centrifugal force and the rotor pin agitates the nanoparticles by small beads under such a low rotating speed as 3m / s. In this study the dispersion performance for agglomerated titania nanoparticles have been investigated by the dual axes beads mill and small beads under various dispersing conditions. As a result, it is found that the titania nanoparticles are easily dispersed around primary particles size and their crystallinity obtained by XRD is kept well original one in comparison with the crystallinity by the conventional beads mill dispersion. This dual axes beads mill will be useful for other nanoparticle dispersions.抄録全体を表示PDF形式でダウンロード (946K) -
山田 孝行, 池田 英幸, 岡林 巧2011 年 48 巻 4 号 p. 206-210
発行日: 2011/04/10
公開日: 2011/04/25
ジャーナル フリーWe study experimentally collapse processes of granular heaps due to moving retaining walls of containers. We focus on trajectories of flows of granular matter during the collapse process with various initial heights (Ho) and widths (Xo) whose aspect ratios (Ho / Xo) are the same value, Ho / Xo = 2.0. It is observed that the heaps show increase of volume which is so called 'dilatancy' at an early stage of collapse and the trajectories of all particles in flowing region exhibit logarithmic curves. The latter yields a scaling law for the trajectories of the granular matter.抄録全体を表示PDF形式でダウンロード (845K)
解説
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吉田 英人2011 年 48 巻 4 号 p. 211-220
発行日: 2011/04/10
公開日: 2016/01/29
ジャーナル 認証ありThis review reports the improvement methods of particle separation performance of gas-cyclone. The effect of apex cone shape, blow-down and local fluid flow control methods on particle separation performance are explained by experiment and CFD studies. It is found that the optimum apex cone angle is 70 deg. The minimum 50％ cut size was obtained by use of this special apex cone. From the flow visualization method by use of soap foam, the upward flow and downward flow coexisted on the inclined surface of this special apex cone.
Particle separation performance by use of blow-down method is higher than that without blow-down method. Because downward velocity near the conical wall section is increased in case of blow-down, particles tend to move into the dust box easily.
The effect of secondary flow injection method on particle separation was also examined. It is found that particle collection efficiency increased with an increased secondary flow rate. The new optimum injection place is reported in this review.
The particle separation performance increases by use of both the inlet guide plate and secondary injection methods. The experimental results obtained are qualitatively supported by the 3-dimensional CFD simulation based on the direct method.抄録全体を表示PDF形式でダウンロード (1481K)
解説 実用環境技術シリーズ
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田中 英嗣, 澤崎 純一2011 年 48 巻 4 号 p. 221-226
発行日: 2011/04/10
公開日: 2016/01/29
ジャーナル 認証ありAt the beverage manufacturing process including the PET bottle blow-molding, we achieved 65 kg-CO2/kl CO2 emission basic unit through reduction of energy waste in entire factory which includes the building, power plant and waste water treatment plant, and optimizations of operating conditions of the equipments. This is top-level in the industry. With regard to water consumption basic unit, we also continue to be in top-level in the industry through execution of reduction of water waste at the entire factory and using of water recycled by multistep water-recycling system. In addition, we also contribute to the CO2 emission reduction of the entire product life cycle in the beverage manufacturing by active adoptions of a lighter material, etc. for reduction of environmental impact. This report shows these activities in detail.抄録全体を表示PDF形式でダウンロード (714K)
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