排序方式： 共有3条查询结果，搜索用时 46 毫秒
1
1.
In this paper, the characteristics of fluid mixing time in a novel extra-loop fluidized bed were studied. The results showed that the mixing time was shortened with the increase of fluid velocity. All the discrete numbers of the reactor were above 0.2. The serial number n was 2.5 -3.0. It was judged accordingly that the reactor fluid state was continous stirred tank reactor （CSTR） mainly. When the inspiratory capacity increased the mixing time of the reactor was shortened. Thus the air input was beneficial for the fluid mixing. During the three phases mixing process, the mixing time of the reactor could be decreased by the n increase of carrier and air loading together, but the change was not significant. The parameters affecting the reactor fluid state were fluid velocity, inspiratory capacity and carrier. KLa could be increased with the air loading increase, and at the same gas/liquid ratio when the pressure drop was high, KL~ value was increased. The amount of carrier complex influence on KLa. As the carrier loading continued to increase, its value had been dropped but the changes was not significant, and optimization condition was found at above 800 1 000 g carrier loading （pouzzolane） or 600 g PVC. Under gas/liquid ratio of 0.8% -5.2%, KLa was （0.62-1.37）×10^-2· s^-1. 相似文献
2.
学校是对学生传授知识的主要场所,然而在知识迅猛发展的今天,仅靠课堂教学已是不够的了,还必须培养学生阅读课外书籍的习惯和方法,让他们能独立地广泛地从课外书籍中吸取更多的营养,让课外阅读成为学生的“第二课堂”。我校图书室近几年来结合学校的思想品德教育和课堂教学的任务,配合少先队组织开展了以“和好书交朋友”为中心的课外阅读活动,先后组织了“读书读报小组”,举办了“读书报告会”、“故事会”、“演讲会“、“读书读报奖章给谁戴”的中队主题会,开设了“课外阅读指导课”,举办了“红领巾读书读报夏令营”以及人人写读书笔记,交流读书心得体会等,收到了良好的效果。我校被评为“全国红领巾读书读报奖章活动先进集体”。 相似文献
3.
我校图书室从办好实验小学的要求出发,几年来重视了为教师开展教学研究,加强备课,改革教学方法提高教学质量,做好教学资料的储备与供应工作,使学校园书室成为教学工作的“加油站”。我们是这样工作的:一、储备资料,以供需求。根据现行课程设置和各年级各学科教材内容, 相似文献
1