问题 问答题 简答题

简述装置燃料气管道因腐蚀而发生大量泄漏中断时的事故处理方法。

答案

参考答案:

①装置区内的燃料气管道因腐蚀而发生大量泄漏立即通知消防和安全人员到现场,并立即关闭边界燃料气进装置阀,立即关闭燃料气炉前手阀;

②装置燃料气中断,异构化炉子联锁停车做如下处理:立即关闭炉前手阀,用蒸汽吹扫炉膛,压缩机继续运转,以带出反应系统中的烃类,立即停止反应器进料,反应物料走旁路,注意高分罐液位,液位低于10%,立即停止向精馏塔供料;

③隔离出吸附塔,吸附单元短循环,二甲苯分馏单元停止进料;

立即对泄漏管线进行置换,置换合格后进行维修;

④维修好后,建立炉燃料气压力,二甲苯加热炉点炉升温,逐步建立热联合流程,装置按正常步骤开车。

阅读理解

Play is the basic business of childhood, and in recent years more and more research has shown the great importance of play in the development of a human being. From earliest  infancy (婴儿), every child needs opportunity and the right material for play, and the main tools of play are toys. The main function of toys is to suggest, encourage and assist play. To succeed in this, they must be good toys, which children will play with often and will come back to again and again. Therefore, it is important to choose suitable toys for different stages of a child’s development.

In recent years research on infant development has shown that the standard a child is likely to reach, within the range of his inherited(遗传的) abilities, is largely determined in the first three years of his life. So a baby's ability to benefit from the right play materials should not be underestimated. A baby who is encouraged, talked to and shown things and played with, has the best chance of growing up successfully.

The next stage, from three to five years old, curiosity knows no bounds. Every type of suitable toy should be made available to the child, for trying out, experimenting and learning, for discovering his own particular ability. Bricks and jigsaws and construction toys; painting, scribbling(乱涂) and making things; sand and water play; toys for imaginative and pretending play; the first social games for learning to play and get on with others.

By the third stage of play development—from five to seven or eight years old— the child is at school. But for a few more years play is still the best way of learning, at home or at school. It is easier to see which type of toys the child most enjoys.

Until the age of seven or eight, play and work mean much the same to a child. But once reading has been mastered, then books and school become the main source of learning. Toys are still interesting and valuable, which lead up to new hobbies, but their significance has changed —to a child of nine or ten years old, toys and games mean, as to adults, relaxation and fun.

小题1:The writer wants us to understand that a child_______.

A.cannot grow up without toys

B.matures(使成熟) through play

C.uses toys as friends

D.has to be taught how to play小题2:According to the passage, the abilities a child has inherited from his parents ________.

A.determine his character

B.will not change after the age of three

C.partly determine the standard he is likely to reach

D.to a large extent determine the choice of toys小题3:The passage tells us that children are the most curious when they are about______.

A.two years old

B.one year old

C.six years old

D.four years old小题4:The article is about_______.

A.the importance of play

B.the importance of books

C.the relationship between play and work

D.children’s speech development

单项选择题