碳管法燃煤烟气汞浓度取样装置研制（英文）

A novel carbon trap sampling system for coal-fired flue gas mercury measurement

自主研制了包括内置吸附剂和两段式碳吸附管在内的整套新型碳管法烟气汞浓度取样装置，以期实现燃煤烟气中颗粒汞和气相总汞浓度的精确测量．在6kW燃煤循环流化床装置上同时采用碳管法与安大略标准法（OHM）进行烟气中汞浓度取样．结果表明，碳管法所得汞平衡率均处于95．47％～104．72％之间．不同工况下碳吸附管第2段穿透率始终低于2％，且与相同工况下OHM测试结果的相对偏差在15．96％～17．56％之间，均小于20％．结果表明，所研制的碳吸附管干法烟气汞浓度取样装置符合美国EPA质量保证和质量控制（QA／QC）标准，可应用于实际燃煤烟气汞浓度的取样测试．

A novel carbon trap sampling system for gas-phase mercury measurement in flue gas is developed, including the high efficient sorbents made of modified biomass cokes and high precision sorbent traps for measuring particle-bound and total vapor-phase mercury in flue gas. A dedusting device is installed to collect fine fly ash for reducing the measurement errors. The thorough comparison test of mercury concentration in flue gas is conducted between the novel sampling system and the Ontario hydro method （OHM） in a 6 kW circulating fluidized bed combustor. Mercury mass balance rates of the OHM range from 95.47% to 104.72%. The mercury breakthrough rates for the second section of the sorbent trap are all below 2%. The relative deviations in the two test cases are in the range of 15. 96% to 17. 56% under different conditions. The verified data suggest that this novel carbon trap sampling system can meet the standards of quality assurance and quality control required by EPA Method 30B and can be applied to the coal-fired flue gas mercury sampling system.