问题 问答题 简答题

加氯操作要注意哪些安全事项?

答案

参考答案:

(1)套在氯瓶阀上的安全帽应当旋紧,不可随意去掉,吊运及上、下车操作都要小心轻放。

(2)在加氯操作前,应先用10%,氨水检查氯瓶是否漏氯,如发现有白色烟雾时,表示有漏氯,要处理好后再运行。

(3)加氯机和氯瓶不要放在阳光下或靠近其他热源附近。

(4)如操作氯瓶的出氯总阀,发现阀芯过紧,难以开启时,不允许用都头敲击,也不能用长扳手硬扳,以免扭断阀颈。

(5)如发现加氯机的氯气管有阻塞,须用钢丝疏通,再用打气筒吹掉杂物,切不可用水冲洗。

(6)开启氯瓶出氯总阀时,应先缓慢开半圈,随即用10%氨水检查有否漏气。

(7)如发现大量漏氯气时,首先,人要居上风侧,并立即组织抢救。抢救人员必须戴好防毒面具,漏氯部位先用竹签塞堵,并将氯瓶移至附近水体中,用大量自来水(或碱水)喷淋,使氯气溶于水中,排入污水管道,以减少对空气的污染。

(8)加氯的过程中,如水射器的压力水突然中断时,应迅速关闭氯瓶的出氯总阀。

(9)使用中的氯瓶应挂上“正在使用”的标牌;氯瓶用完后应挂上“空瓶”标牌;新运来的应挂上“满瓶”标牌,以便识别。,瓶子要求专瓶专用,不可混用。

(10)在加氯间应备有专用工具和防毒面具,供意外时使用。

(11)有条件的单位,应结合岗位责任制,设立专人专职加氯和维修。

阅读理解

阅读理解。

     Mr. White was in bed and was trying to go to sleep when he heard the doorbell ring. He turned on the

light and looked at the clock. It was half past twelve. "Who can be it at this time of night?" he wondered.

He decided to go and find out. So he got out of bed, put on his jacket and went to the door. When he opened

the door, there was nobody there. "That's very strange," he thought. Then he went back to his bedroom, took

off his jacket, got back into bed, turned off the light and tried to go to sleep.

     A few minutes later he heard the doorbell ring again. Mr. White jumped out of the bed very quickly and

rushed to the door. He opened it, but again he found no one there. He closed the door and tried not to feel too

nervous. Then he saw a piece of paper on the floor inside the door. He picked it up. There were some words

on it: "Now it's after midnight, so it's April 1st. Happy April Fool's Day!"

     "Oh, it was the funny boy next door!"  Mr. White smiled.

1. Mr. White was trying to go to sleep when he heard _____. [ ]

A. somebody sing

B. the doorbell ring

C. the telephone ring

D. somebody knock at the window

2. At first Mr. White turned on the light and _____. [ ]

A. got out of the bed

B. put on his jacket

C. wanted to know the time

D. called the police 

3. When he opened the door at the first time, he found _____ outside the door. [ ]

A. no one

B. a boy

C. his friend

D. a piece of paper

4. The story happened _____. [ ]

A. At noon

B. at twelve

C. on April 2nd

D. on April 1st

5. The boy rang the doorbell because he wanted to _____. [ ]

A. borrowed Mr. White's clock

B. ask Mr. White for a piece of paper

C. make fun of Mr. White

D. tell Mr. White a story

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