问题 问答题 简答题

百页窗(波形板)分离器的结构及工作原理是怎样的?

答案

参考答案:

百页窗分离器是由许多平行的波浪形薄钢板组成,波形板厚度为0.8~l.2mm,相邻两块波形板之间的距离为10mm,并用2一3mm厚的钢板边框固定。

工作原理及过程是:经过粗分离的蒸汽进入百叶窗分离器后,在波形板之间曲折流动。蒸汽中的小水滴,在离心力、惯性力和重力的作用下抛到板壁上,在附着力的作用下,使水滴粘附在波形板上形成水膜。水膜在重力作用下向下流入汽包水容积,使汽水得到进一步分离。由于利用附着力分离蒸汽中细小水滴的效果好,所以百叶窗分离器被广泛地用来作为细分离设备。

阅读理解

阅读理解。

     If you are like most people, your intelligence (智力) changes with the seasons, you are probably a lot

  sharper in the spring than you are at any other time of year. A famous scientist, Ellsworth Huntington

 (1876-1947),concluded (总结) that climate and temperature have an effect (作用) on your mental

 abilities(智力).

     He found that cool weather is much more favorable for creative (激活) thinking than summer heat. This

  does not mean that all people are less intelligent in the summer than they are during the rest of the year. It

  does mean, however, that the mental abilities of large numbers of people tend to be lowest in the summer.

    Spring appears to be the best period of the year for thinking. One reason may be that in the spring man's

  mental abilities are affected (受影响) by the same factors (因素) that bring about great changes in

 nature .

     Fall is the next-best season, then winter. As for summer, it seems to be a good time to take a long

  vacation from thinking.

1. Ellsworth Huntington decided that climate and temperature have _____.

    A. a great effect on everyone's intelligence

    B. some effect on most persons' intelligence

    C. some effect on a few persons' intelligence

    D. no effect on most persons' intelligence 

2. Why is spring the best season for thinking? Because _____.

    A. all nature, including man, is growing then

    B. it lasts longer than the other seasons

    C. it is not too warm and not too cold

    D. both B and C

3. The two best seasons for thinking seem to be _____.

    A. spring and fall

    B. winter and summer

    C. summer and spring

    D. fall and winter 

4. Which of the following is wrong?

    A. It seems that the cold of winter is better for thinking than very hot weather.

    B. Perhaps Huntington based (以……为基础) his conclusion (结论) on work with persons in the

         same climate.

    C. Fall is the second best season for thinking.

    D. Both A and C are wrong 

5. The main idea of this passage is that _____.

    A. most people's intelligence changes with seasons

    B. seasons are the reason of the changing intelligence

    C. spring is the best season for thinking

    D. summer is the best season for taking a long vacation

操作题