问题 问答题 简答题

邻二甲苯干点不合格的原因是什么?

答案

参考答案:

原因:

(1)邻二甲苯塔的回流量小,塔顶温度偏高。

(2)邻二甲苯塔底温度偏高。

(3)机泵故障造成回流中断。

(4)温差范围控制过高。

(5)气候变化,影响温差失灵。

(6)仪表故障。

(7)分析误差。

处理:

(1)增加回流量,降低塔顶温度。

(2)降低塔底温度。

(3)切换备用回流泵,保证回流量。

(4)降低温差控制范围。

(5)及时调整。维持塔底温度及回流量。

(6)联系仪表修理。

(7)联系化验复查。

完形填空
完形填空。
       Newton (牛顿) was a great English scientist. He was one of the greatest     1     in history. One
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was going to boil (煮) the egg for him. But Newton wanted to do by     4    . He said to Mary, "Please
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boil the egg. She went to his room again half an hour later. What did she     9   ? Newton was standing by
the pan, having the    10    in his hand. He had put the watch in the pan and was boiling it .
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