问题 问答题 简答题

影响干熄炉圆周方向焦炭温度分布不均,分析故障原因?

答案

参考答案:影响干熄炉圆周方向焦炭温度分布不均的主要因素有:

干熄炉内焦炭颗粒大小的分布发生变化,产生变化的主要原因,其一,料钟极端磨损,分散红焦的功能下降。

其二,焦炉操作条件的改变会影响焦炭粒径的分布,如配煤比的改变、焦炉热工条件的改变及结焦时间的改变等。

干熄炉内焦炭下降速度的分布发生变化。产生变化的主要原因是:其一,调节棒的调节不够或头部磨损。

其二,中央风帽严重变形或磨损。

干熄炉内冷却气体流速的分布发生变化。产生变化的主要原因是焦炭颗粒分布以及焦炭下降速度分布发生变化。

阅读理解

An Englishman was showing a foreign visitor around London. "What's that strange building?" asked the visitor. "That's the Tower of London." "I see. How long did it take to build it?” “About 500 years." "In my country we can build it in five months." said the visitor. A short time after that, they come to St. Paul's Cathedral (大教堂)."Very interesting, "said the visitor, "How long did it take to build it?  Nearly forty years." said the Englishman. "In my country we can finish it in forty days." said the visitor. This went on all day. They visited most of the best known buildings in the city. Every time they saw a new one, the visitor asked what it was and how long it took to build it. Then he said that they could do the same things much faster in his country. At last the Englishman got angry with the visitor though he tried not to show it. A few days later they came to the House of Parliament(议会大厦) and the visitor asked his usual question. "What's that?” The Englishman answered, "I've no idea. It wasn't there last night."

小题1:The Englishman showed the foreign visitor around____________.

A.the Tower of London

B.St. Paul's Cathedral

C.some famous buildings in London

D.the whole city of London小题2:The visitor said that in his country it would take them ____________to build St. Paul's Cathedral.

A.less than half a year

B.more than a month

C.five hundred years

D.forty years小题3:The Englishman was very angry by the end of the day, but he______________

A.tried not to let the visitor know it

B.tried not to show the visitor around the city

C.had no time to tell the visitor

D.didn't want to say anything小题4:The Englishman's last answer showed he______________.

A.was sorry that he hadn't seen the building before

B.could say nothing because he didn't know anything about it

C.was not happy and decided to give him a surprising answer

D.didn't know how to tell the visitor the name of the building小题5:The best title (标题) for this passage is_______________.

A.English history

B.Around London

C.What's that strange building?

D.How long did it take to build it?

单项选择题