问题 问答题 简答题

再热器水压试验如何进行?

答案

参考答案:

1)对参与打压系统进行全面检查。确认已准备好足够的除盐水。

2)确认再热器系统就地(再热器减温水已安装两只不同汽源,精度在0.5级以上的标准压力表。

3)检查再热器进、出口管道上已由检修人员加装了堵板阀。

4)联系检修做好防止安全门动作的保护措施。

5)过热器系统各疏水门应开启。

6)通过再热器减温水管道经打压管路给再热器系统上水打压。

7)A、B侧再热器疏水一、二次手动门全关。

8)B侧再热器减温水一、二次电动门全开,调整门全关备用。

9)A侧再热器减温水一、二次电动门全关,调整门全关

10)关闭A、B侧再热器减温水管道隔离手动门。

11)打开再热器打水压注水一、二次门。

12)上水应为化验合格的除盐水,上水温度40℃-70℃,再热器系统水容积:96.3m3;上水时间:夏季1小时,冬季1.5小时。

13)检查并启动一台给水泵运行,检查给水泵运行正常。用给水泵勺管控制,且给水泵出口电动门全关并手动校紧。

14)试验压力以冷段再热器入口联箱就地压力表读数为准,当压力升到2MPa时,暂停升压,进行一次全面检查,如无缺陷和泄漏可继续升压。

15)当压力升到4.32MPa的工作压力时,停止升压,进行全面检查。决定是否继续升压,做超压试验。

16)压力升到6.48MPa时,应立即停泵,关闭升压控制门,记录时间,在此压力保持5分钟,记录压力下降情况。

17)压力缓慢降到4.32MPa,进行全面检查,有无缺陷泄漏和异常现象做好标记和记录,观察压力变化情况。

试验结束后,通知热工,化学冲洗表管和取样管,以每分钟0.3MPa的速度降压,当汽包压力降至0.15MPa时,

开启蒸汽系统各疏水门和空气门,是否需要放水,由水压试验负责人根据具体情况决定。

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     When I was six years old, my sister, Sally Kay, was a submissive three-year-old girl. For some
reasons, I thought we needed to    1   some money. So I decided we should "hire out" as maids. We
visited the neighbors,    2   to clean houses for them for $1.    3   our offer was reasonable, there were
no takers. One neighbor even    4   my mom to tell her what we were doing.
     Mother had just hung up the phone    5   we came into the house. "Girls," mother asked, "why were
you two    6   the neighborhood telling people you would clean their houses?" We both denied. That her
dear little girls could be such "boldfaced (厚颜无耻的) liars" made her feel shocked and terribly    7   .
Mom then told us that Mrs. Jones had just called and told her everything.
     Faced with the truth, we    8   what we had done. Mom tried to explain how much a fib (小谎) hurt
    9   she didn't feel that we really understood. Then Mom cheerfully asked, "Would you two like to go
to see the movie The Matinee this afternoon?"
      "Oh, wonderful!" After lunch, we got bathed and all    10   up.  It was like getting ready for a birthday party. We   11  outside the apartment, not wanting to miss the    12  that would take us downtown. At
the bus station, Mom stunned (使震惊) us by saying, "Girls, we are not going to the    13   today."
     "What?" we objected    14   . "What do you mean? Aren't we going to The Matinee?" She explained
this was how much a fib could hurt. "It is important that what we say is    15   ," Mom said. "I fibbed to
you just now and I felt   16   . I don't want to fib again and I'm    17  you don't want to fib again either.
People  must be    18   to others."
     That was    19   my sister and I learned to be truthful. It was a(n)   20  that we would never forget.
( )1. A. produce      
( )2. A. offering      
( )3. A. Although      
( )4. A. met          
( )5. A. until         
( )6. A. going around  
( )7. A. encouraged    
( )8. A. recognized    
( )9. A. after         
( )10. A. looked      
( )11. A. talked      
( )12. A. ticket      
( )13. A. cinema      
( )14. A. sadly        
( )15. A. humorous    
( )16. A. happy        
( )17. A. afraid      
( )18. A. enthusiastic
( )19. A. how          
( )20. A. lesson      
B. earn        
B. telling      
B. Since        
B. found        
B. when        
B. searching for
B. challenged  
B. admitted    
B. but          
B. stood        
B. laughed      
B. bus          
B. house        
B. quietly      
B. valuable    
B. awful        
B. pleased      
B. sympathetic  
B. why          
B. topic        
C. steal      
C. asking      
C. So          
C. persuaded  
C. before      
C. shouting at  
C. hurt        
C. scolded    
C. or          
C. stayed      
C. hurried    
C. film        
C. neighbor's
C. patiently  
C. true        
C. proud       
C. sure        
C. good        
C. whether    
C. subject    
D. loan            
D. giving          
D. If              
D. telephoned      
D. where            
D. heading for      
D. excited          
D. discussed        
D. as              
D. dressed          
D. reminded        
D. call            
D. barber's        
D. weakly          
D. worth            
D. funny            
D. curious          
D. honest          
D. there            
D. idea            
单项选择题