【判断题】
除氧器的作用就是除去锅炉给水中的氧气
A. 对
B. 错
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答案
B
解析
暂无解析
相关试题
【判断题】
除氧器滑压运行时,当机组增加负荷较快时,除氧效果变差
A. 对
B. 错
【判断题】
电厂中采用高压除氧器可以减少高压加热器的台数,节省贵重材料
A. 对
B. 错
【判断题】
锅炉给水未经良好的除氧,无疑是造成热力设备严重腐蚀的原因之一
A. 对
B. 错
【判断题】
加热式除氧是利用气体在水中溶解的性质进行除氧
A. 对
B. 错
【判断题】
门杆漏汽始终是导入除氧器的
A. 对
B. 错
【判断题】
汽轮机从满负荷下全甩负荷的工况,是除氧器滑压运行时给水泵最危险工况
A. 对
B. 错
【判断题】
水膜式除氧器的除氧效果最好
A. 对
B. 错
【判断题】
提高除氧器的布置高度,设置再循环管的目的都是为了防止给水泵汽化
A. 对
B. 错
【判断题】
在除氧器滑压运行的情况下,机组负荷突然下降时,其除氧效果反而会更好
A. 对
B. 错
【判断题】
除氧器投加热时开启再沸腾管可以提高除氧器的加热速度
A. 对
B. 错
【判断题】
高加退出运行的顺序是按抽汽压力由低至高
A. 对
B. 错
【判断题】
高压加热器的疏水也是除氧器的一个热源
A. 对
B. 错
【判断题】
高压加热器随机启动时,疏水可以始终导向除氧器
A. 对
B. 错
【判断题】
高压加热器投运,应先开出水电动门,后开进水电动门
A. 对
B. 错
【判断题】
高压加热器装设水侧自动保护的根本目的是防止汽轮机进水
A. 对
B. 错
【判断题】
高压加热器停用时应限制机组的负荷主要是防止汽轮机通流部分过负荷
A. 对
B. 错
【判断题】
换热器逆流布置时,由于传热平均温差大,传热效果好,因而可增加受热面
A. 对
B. 错
【判断题】
上一级加热器水位过低,会排挤下一级加热器的进汽量,降低冷源损失
A. 对
B. 错
【判断题】
投入高压加热器汽侧时,要按压力从高到低,逐个投入,以防汽水冲击
A. 对
B. 错
【判断题】
由于传热热阻的存在,表面式加热器传热端差不可能为零
A. 对
B. 错
【判断题】
与表面式加热器相比,采用混合式加热器有较高的效率
A. 对
B. 错
【判断题】
运行中高压加热器进汽压力允许超过规定值
A. 对
B. 错
【判断题】
运行中引起高压加热器保护装置动作的唯一原因是加热器钢管泄漏
A. 对
B. 错
【判断题】
在运行中,发现高压加热器钢管泄漏,应立即关闭出口门切断给水
A. 对
B. 错
【判断题】
加热器的疏水采用疏水泵排出的优点是疏水可以利用
A. 对
B. 错
【判断题】
高加停用后机组带负荷不受限制
A. 对
B. 错
【判断题】
若抽汽管道的阀门没有全开,会造成加热器出口端差减小
A. 对
B. 错
【判断题】
加热器的水位太高,其出口水温会降低
A. 对
B. 错
【判断题】
高压加热器的冷凝段主要是利用蒸汽过热热来加热给水
A. 对
B. 错
【判断题】
切除所有加热器,其机组负荷最大为50%的额定负荷
A. 对
B. 错
【判断题】
高压加热器水侧注水时,加热器水位计有水属于正常
A. 对
B. 错
【判断题】
高压加热器水侧注水后投运前,水侧压力比给水压力低属于正常
A. 对
B. 错
【判断题】
加热器泄漏或故障时严禁投入
A. 对
B. 错
【判断题】
加热器必须在水位计完好、报警信号及保护动作正常情况下才允许投入
A. 对
B. 错
【判断题】
高低压加热器原则上采用随机滑启、滑停的方式
A. 对
B. 错
【判断题】
当不具备随机滑启、滑停的条件时,依压力由低到高逐台投入加热器,每台加热器投入时,投入间隔时间不少于10分钟。由高到低逐台停止加热器,每台加热器停止时,间隔时间不少于10分钟
A. 对
B. 错
【判断题】
投停过程中应严格控制加热器出口水温温升率,高加出口温升率≤56℃/h,不能超过110℃/h。低压加热器温度变化率以2℃/min为宜,不大于3℃/min
A. 对
B. 错
【判断题】
加热器投入时应先投水侧,后投汽侧;停止时先停汽侧,后停水侧
A. 对
B. 错
【判断题】
机组正常运行中,加热器投入时,应保证凝结水过滤及除盐装置100%投入,高加疏水水质合格后疏水至除氧器
A. 对
B. 错
【判断题】
高压加热器的上端差为对应的抽汽温度与加热器进水温度的差值
A. 对
B. 错
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