问题 问答题 简答题

在加酸调节pH值的循环冷却水系统,加酸过量后应如何处理?

答案

参考答案:

①立即关闭加酸管线阀门,停止进酸;

②进行快速排放置换,立即打开离加酸点最近的排放阀,然后相继打开其他排放阀进行排放,同时以最大的补水量向系统补水,争取以最快的速度让pH值尽快回升,也可视情况用Na2C03处理;

③进行补膜处理,待系统pH值自然回升正常后,应加大缓蚀剂的投加量,进行补膜处理,然后恢复正常操作。

单项选择题
完形填空
完形填空
     My wife and I had just finished the 150mile trip home from our daughter's college.It was the first time
in our lives that we would __1__ for any length of time.We wondered how other people had __2__ it.
     Later in bed, I __3__ the time I started college.My father had driven me, too.My mother had to stay
home to keep the __4__from getting into the crops.I, the fourth in a line of brothers, was the first to
__5__ college.
      The truck was slow, and I was glad.I didn't want to get to the city __6__.I shook hands with my
father in the truck and he didn't say a word.But I knew he was going to make a little __7__.He finally
said, "I never went to college and __8__of your brothers did.I can't say don't do this or that, because
everything is __9__and I don't know what is going to come up, but I think things will __10__.When you
get a job, be sure to be honest and work hard." I knew that soon I would be __11__in the big town and
I would be __12__the life home.
      Then my father__13__the Bible (圣经) that he had read so often.I knew that he would miss it but I
must__14__it.He just said, "This can help you __15__you will let it."
     When I finished school I took the Bible __16__to my father.But he said he wanted me to __17__it.
     Now, too late, I remember.It would have been so __18__ to give it to my daughter when she got out
of the car.But I didn't.My father could give me only a Bible, but I don't really believe now that I gave her
half as __19__as my father gave me.So the next morning I__20__up the book and sent it to her.I wrote
a note."This can help you." I said, "if you will let it."
( )1. A. worry
( )2. A. left
( )3. A. wasted
( )4. A. policemen
( )5. A. graduate from
( )6. A. very late
( )7. A. speech
( )8. A. some
( )9. A. impossible
( )10. A. work out
( )11. A. happy
( )12. A. losing
( )13. A. brought about
( )14. A. refuse
( )15. A. if
( )16. A. down
( )17. A. keep
( )18. A. popular
( )19. A. much
( )20. A. set
B. separate
B. stood
B. spent
B. workers
B. go away to
B. far away
B. living
B. one
B. different
B. die out
B. alone
B. spending
B. brought out
B. mark
B. unless
B. up
B. return
B. strange
B. many
B. turned
C. stay
C. enjoyed
C. remembered
C. cattle
C. be dismissed from
C. too soon
C. promise
C. none
C. difficult
C. hold out
C. free
C. missing
C. brought up
C. follow
C. but
C. back
C. post
C. ready
C. far
C. gave
D. travel
D. tried
D. killed
D. soldiers
D. set up
D. once again
D. progress
D. all
D. favorite
D. break out
D. lost
D. living
D. brought down
D. take
D. though
D. away
D. sell
D. nice
D. good
D. wrapped