相关试题
【判断题】
混床中树脂失效程度越大,反洗分层越容易
【判断题】
离子交换树脂受铁、铝及其氧化物污染后,颜色变深
【判断题】
在阴离子交换器再生过程中,加热再生液到30~40℃,可以提高再生效果
【判断题】
阴床失效时,最先穿透树脂层的阴离子是Cl-
【判断题】
混凝剂在水中的混凝处理过程中,其本身也发生电离、水解、形成胶体和凝聚等过程
【判断题】
在逆流再生固定床中,中间配水装置以上的树脂也起离子交换作用
【判断题】
进行混凝和沉淀处理时,应及时清除泥渣,以使沉淀过程更完全,更快速
【判断题】
在一级除盐设备中,阴床出水不合格是由于阳床失效造成的
【判断题】
大孔型离子交换树脂具有抗氧化性能和抗有机物污染性能好、机械强度大、交换速度快等优点
【判断题】
原水中Ca2+含量高,则H型交换器失效后就能用硫酸再生
【判断题】
树脂在吸着不同离子后,密度不同,沉降速度也不同
【判断题】
长期贮存树脂,最好把树脂转变成盐型,浸泡在水中
【判断题】
采用逆流再生的离子交换器再生后,底层交换剂的含Na+量对出水水质起着决定性的作用
【判断题】
一般来说,树脂的颗粒越小,交换反应越快,但压头损失相应增大
【判断题】
阴离子交换器失效时会出现电导率暂时下降的现象
【判断题】
排污损失水量与冷却塔的蒸发损失水量和浓缩倍率无关
【判断题】
循环水中CO2散失后,重碳酸盐硬度易转变成碳酸钙从水中析出
【判断题】
锅炉炉管的向火侧较背火侧易发生腐蚀、过热和爆管
【判断题】
循环水的浓缩倍率越高,其中Ca(HCO3)2分解的可能越小
【判断题】
在混床运行中,阴、阳离子的交换反应几乎是同时进行的,基本上清除了交换的影响,故出水水质很好
【判断题】
在正常运行中时,阳离子交换器出水的酸度,近似等于进水中氯离子,硫酸根及硝酸根等各种阴离子的总和
【判断题】
游离CO2的腐蚀使金属均匀地变薄,不会引起金属的严重损伤,故不需引起重视
【判断题】
一般对钢铁有缓蚀效率的缓蚀剂,同样对铜也有效
【判断题】
锅炉炉水的运行指标都应是通过化学试验而定的
【判断题】
在有奥氏体钢的系统内不用含氯离子的清洗剂
【判断题】
发电机铜导线内结水垢越厚,发电机线棒温度越低
【判断题】
混床中,如果阴、阳树脂的配比稍有变化,会对出水水质产生明显影响
【判断题】
同一种树脂在不同水质条件下,工作交换容量有一定差异
【判断题】
对于混合床来说,在通常范围内,进水含盐量的变化或树脂再生度的不同,基本上只影响混床运行周期的长短而不影响出水水质
【判断题】
对混床来说,在通常的树脂层高度范围内,树脂层高度和运行流速对出水水质的影响不大
【判断题】
当锅炉负荷急剧增加,炉水中PO43-减少,酚酞碱度升高,是因为发生了盐类暂时消失现象
【判断题】
热力设备运行工况对热力设备的腐蚀有很大影响
【判断题】
一般地,同一水质条件下,参数越高的机组,腐蚀速度越高
【判断题】
热力设备的停用腐蚀,基本都属于二氧化碳腐蚀
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Young ___ he is, he knows how to get along with others.
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Little Tom is used to getting up ___eight every morning.
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