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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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烟气汞浓度监测吸附管离线采样方法的拓展应用
, PP. 17-22
Keywords: 燃煤电厂,吸附管采样法,汞形态监测,高温,高灰
Abstract:
将吸附管离线采样方法应用于美国epamethod30b标准允许外的高温、高灰条件下的汞浓度及形态监测试验研究，以拓展该方法的应用范围。试验结果表明：当采用吸附管采样法测量烟气总汞，且控制低流速采样并采用防尘罩时，该方法可以应用于湿法脱硫除尘前等粉尘浓度较高的场合，由粉尘引起的误差小于1%，但该方法不适用于高粉尘浓度的极端条件；在空气预热器前的高温位置，通过加设风冷套管并控制采样枪插入深度，可以保证吸附管温度处于合适的温度水平，从而保证测量的准确性；在烟囱入口等低粉尘浓度区域，测得的元素汞的比例与hg？cems基本一致，尤其是湿法脱硫后的测试数据一致性良好，而干法脱硫后的采样测试结果略显偏低；但在高粉尘浓度区域，测得的元素汞比例则可能严重偏低。
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