问题 问答题

防止灰库返水的措施有哪些?在灰库发生少量返水后应如何处理确保灰不板结?

答案

参考答案:

措施:

1.加强对灰库水力喷射器呼吸阀的检查,确保呼吸阀在卸灰期间开合正常并可以听见明显的负压声音;

2.灰库卸料投运时运行人员应就地检查、监视,确认下灰正常后方可离开;

3.长期停止湿卸灰时应将手动插板隔离阀关闭,初次启动时应将手动插板隔离阀开度调至小开度待确认下灰正常后逐步开大;

4.运行中应对灰库卸料系统增加检查次数,并确认给料机变频器指数未变更,小灰斗及水力混合器前管道温度较高;

5.在开启卸灰时应注意观察冲灰水泵电流是否有异常并注意灰浆池液位是否正常上升,冲灰水压应保持在0.45Mpa以上,在增加卸灰点时应重新核实水压是否正常。

处理:

1.立即切除进入返水灰库的飞灰系统输送灰管并确认切换阀正常到位无内漏;

2.联系粉煤灰加强对返水灰库的干卸料系统进行排放;

3.保证灰库气化风及电加热器运行正常;

4.联系检修清除湿式卸料系统存在堵塞的管道,在疏通后将手动插板隔离阀开度保持小开度进行卸灰;

5.返水灰库有两个湿卸料系统的应将另一个未返水的湿卸料开启保持长时间卸灰,目的是利用热灰的流动性将已进水受潮的灰烘干并排出。

阅读理解

根据短文内容,判断正(T)误(F)。

     I think the most terrible thing in life for my little brother is getting up in the morning. He is

almost sick when my mother calls, "Herbert! It's seven o'clock! Get up!"

     Herbert answers, "I'm coming!" and goes right back to sleep. I'm not at all like my brother.

     I don't like to go to bed late at night but I don't mind getting up early in the morning.usually

wake up before my mother calls me.I jump out of bed and go into the bathroom to take a shower.

I get dressed, brush my teeth, comb my hair, and get ready to go downstairs for breakfast as soon

as my mother calls.

     But not Herbert. He just sleeps.A military band (军乐队) in our bedroom could not wake

him up.I call him and say,"Get up! Mum will be up here to pull you out of bed if you don't get

up immediately!"

      But he just sleeps. After calling a few more times my mother has to come upstairs and pull

Herbert out of bed. It's that way every day with my little brother. Perhaps some day he'll learn to

get up on time, but I really don't think so.

( )1. The most terrible thing in life for my little brother is going to school.                          

( )2. I'm not like my brother because like to go to bed early at night and get up early in the morning.

( )3. I usually jump out of bed and go into the bathroom for a shower before my mother calls.            

( )4. When Mother calls, Herbert doesn't answer and remains in bed.                                      

( )5. My mother often has to go upstairs and pull Herbert out of bed as he refuses to get up.            

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