问题 问答题 论述题

如何防止燃气轮机进气系统堵塞事故?

答案

参考答案:

防止燃气轮机进气系统堵塞事故措施:

定期对进气系统周边进行清理,禁止在进气口堆放杂物;

在运行中的燃气轮机进气系统周围动用明火,必须做好相关的安全风险分析与防范措施,防止引燃进气滤网;

结合运行中进气系统的工作状况,做好进气滤前的定期清洗维护、定期测试除冰系统工作状态,确保进气稳定良好;

严密监视进气滤网差压,及时清理差压大的滤网;

检修后必须安排专业技术人员对进气系统进行仔细检查,清理所有系统以外的残留物;

运行中反用的进气滤反吹系统,对排风机的电缆、接线点和电磁阀必须做详细检查,严防因电气设备短路引起进气系统着火;

配合燃气轮设备定期维护,加强燃气轮机压气机进气可转导叶IGV的传动、液压部件的活动性能与疲劳检查,防止因开度变化影响燃气轮机进气量;

燃气轮机进气系统内存在异物禁止启动燃气轮机。

多项选择题
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When the school year starts, it can be difficult to get up early.After a few early mornings, extreme tiredness might make you feel like you’re going to fall over.The amazing thing is that you probably manage to stay awake all day long and into the night.But how?

A chemical in the brain called dopamine(多巴胺)might be part of the answer.According to new research, dopamine is what keeps people who don’t get enough sleep from conking out.The chemical also has a complicated influence on your ability to think and learn when you don’t get enough sleep.

To study sleep loss and its effect on the brain, scientists rounded up 15 healthy volunteers.The scientists tested each person’s memory and ability to pay attention twice: once after a good night’s sleep and once after being kept up all night long.During the tests, the scientists measured levels of dopamine in the brains of the volunteers.

The results showed that when the volunteers stayed up all night, dopamine levels increased in the brain.Higher levels of dopamine kept the volunteers awake even though they felt tired.Some people are amazingly able to think clearly and react quickly, even when they haven’t had much sleep.Other people have a really hard time paying attention when tired, and their reactions are slow.All of these may be related to the dopamine levels.However, the researchers found that higher levels of dopamine don’t remove the trouble people have thinking and learning while sleep-deprived (缺乏睡眠的).

60.The underlined phrase “conking out” in the second paragraph probably means     .

A.staying awake     B.falling asleep   

C.paying attention         D.falling over

61.With a higher level of dopamine, one     .

A.will not dream dreams at night              B.may have trouble in falling asleep

C.can still stay awake after staying up          D.can do better in learning and working

62.We can infer from the last paragraph that        .

A.not all people can react quickly after they stay up late

B.dopamine in our brain does not work when we are sleeping

C.lack of sleep has no influence on one’s learning and thinking ability

D.the higher the dopamine levels are, the more quickly one reacts

63.The passage is developed by        .

A.setting up a point and discussing it

B.giving examples and drawing a conclusion

C.pointing out similarities and differences  

D.showing a fact and explaining the cause