超级大乐透奇偶走势图带连线

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烟气湿度仪是怎么进行工作的?

  依据我国《固定污染源排气中颗粒物测定与气态污染物采样办法》(GB/T16157-1996)和《固定源废气监测技术规范》(HJ/T397-2007)中相关规定,排气中水分含量应依据不同的丈量目标选用冷凝法、分量法或干湿球法中的一种办法烟气湿度仪测定。冷凝法和分量法需在烟道内抽取必定体积的排气,使之经过冷凝器或装有干燥剂的吸湿器,间接丈量排气中的水分含量。而干湿球规律依据非饱和的气体中含湿量与干湿球温差之间存在函数联系,经过丈量干球温度和湿球温度确定气体含湿量。但这三种办法在实际采样中都不很抱负。分量法、冷凝法尽管丈量精度高,但测验复杂,测验条件要求高,测验时间长,适用于测丈量要求较高的执法监督丈量。干湿球法测验简略,但在烟气温度过高(260℃)、烟气流速过高或过低、含高浓度的颗粒物、排放酸性气体的工况,不能用其进行丈量,因此,干湿球法通常用于大气湿度丈量。此外,冷凝法、分量法及干湿球法均为手艺丈量,无法满足烟气水分动态在线丈量的要求。

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