问题 问答题 简答题

锅炉正常运行时,调整的内容有哪些?

答案

参考答案:

水位调节:

应保持正常水位,应根据负荷调节给水量。当低负荷时,水位应稍高于正常水位,以免负荷增大时,水位下降造成缺水,反之则相反。

压力调节:

应保持锅炉压力平稳,不得超过最高运行压力,应根据负荷调整燃烧。蒸发量大于外界负荷时,汽压就上升,蒸发量小于外界负荷时,汽压就下降,因此,对于锅炉汽压的调节,也就是蒸发量的调节,而蒸发量的大小取决于司炉人员对燃烧的调节。

燃烧的调节:

锅炉在运行中应保持一定压力,因此必须依据负荷的变化调节燃烧,相应增大或减少燃料的供应量。而燃料供应量的增减必须相应的调节空气量,否则会出现不完全燃烧,使锅炉热效率降低。

完形填空
I'd been travelling for long hours on a lonely country road when I had a flat tire. So I had to stop and get the tools to  51 the problem. It certainly wasn’t  52 doing this with a white shirt and suit on.
Nightfall was approaching. Suddenly a car pulled  53 from behind me. A man got out and offered to  54 me. Seeing his unpleasant appearance and tattoos(纹身)on his arm, I became  55 as thoughts of robberies flashed through my mind. But  56 I could say anything he had already begun to take the tools to change the  57 . While watching him I happened to look back at his car and noticed someone sitting in the passenger seat. This had  58 me.
Then, without  59 , it began to rain. He suggested that I wait in his car because my car was unsafe. As the rain increased, getting us wet within seconds, I  60 agreed. When I settle into the back seat, a woman’s voice came from the front seat. “Are you all right?” She turned around to me. “Yes, I am.’’ I replied with much  61 when seeing an old woman there. It must be his Mom, I thought. To my  62 , the old woman was a neighbor of the man who was helping me. “Jeff insisted on stopping when he saw you  63 with the tire. ”“I am grateful for his help, ” I said. “Me, too!” she said with a smile. He helped drive her to see her husband twice a week in a nursing home. She also said that he  64 at the church and tutored disadvantaged students.
The rain stopped and Jeff and I changed me tire. I tried to offer him money and of course he  65 it. It was shameful that I judged people by the way they  66 . As we shook hands I began to apologize for my  67 . He said, ‘‘I experience that same  68 often. People who look like me don’t do nice things. I  69 thought about changing the way. But then I saw this as a chance to make a  70 . So I’ll leave you with the same question I ask everyone who takes time to know me. If Jesus returned tomorrow and walked among us again, would you recognize Him by what He wore or by what He did?’’
小题1:
A.findB.makeC.fixD.avoid
小题2:
A.usefulB.easyC.wiseD.lucky
小题3:
A.upB.outC.onD.round
小题4:
A.carryB.liftC.driveD.help
小题5:
A.discouragedB.frightenedC.disappointed D.astonished
小题6:
A.whenB.untilC.asD.before
小题7:
A.tireB.suitC.expressionD.shirt
小题8:
A.embarrassedB.concernedC.discouragedD.puzzled
小题9:
A.warningB.realizingC.knowingD.waiting
小题10:
A.directlyB.happilyC.hurriedlyD.unwillingly
小题11:
A.fearB.satisfactionC.relief D.excitement
小题12:
A.regretB.amusementC.surpriseD.delight
小题13:
A.workingB.repairingC.fightingD.struggling
小题14:
A.studiedB.performedC.grewD.volunteered
小题15:
A.refusedB.keptC.ignoredD.left
小题16:
A.behavedB.spokeC.looked D.thought
小题17:
A.selfishnessB.stupidityC.weaknessD.disability
小题18:
A.lifeB.incidentC.reactionD.change
小题19:
A.hardlyB.actuallyC.finally D.probably
小题20:
A.pointB.startC.remark D.comparison
单项选择题