The in-situ instrumentation technique for measuring mercury and itsspeciation downstream a utility 100 MW pulverized coal (PC) fired boiler system was developed andconducted by the use of the Ontario hydro method (OHM...The in-situ instrumentation technique for measuring mercury and itsspeciation downstream a utility 100 MW pulverized coal (PC) fired boiler system was developed andconducted by the use of the Ontario hydro method (OHM) consistent with American standard test methodtogether with the semi-continuous emissions monitoring (SCEM) system as well as a mobile laboratoryfor mercury monitoring. The mercury and its speciation concentrations including participate mercuryat three locations of before air preheater, before electrostatic precipitator (ESP) and after ESPwere measured using the OHM and SCEM methods under normal operation conditions of the boiler systemas a result of firing a bituminous coal. The vapor-phase total mercury Hg(VT) concentration declinedwith the decrease of flue gas temperature because of mercury species transformation from oxidizedmercury to particulate mercury as the flue gas moved downstream from the air preheater to the ESPand after the ESP. A good agreement for Hg°, Hg^(2+) and Hg( VT) was obtained between the twomethods in the ash-free area. But in the dense particle-laden flue gas area, there appeared to be abig bias for mercury speciation owing to dust cake formed in the filter of OHM sampling probe. Theparticulateaffinity to the flue gas mercury and the impacts of sampling condition to accuracy ofmeasure were discussed.展开更多
T H744.4 96063986用于废水处理后在线测量的一种浊度计=A newnephelometer for on——line measurement afterwaste water treatment[刊,中]/周伟强(广州造纸厂.广东,广州(510280))∥国外分析仪器.技术与应用.—1995,(1).—80—82,76...T H744.4 96063986用于废水处理后在线测量的一种浊度计=A newnephelometer for on——line measurement afterwaste water treatment[刊,中]/周伟强(广州造纸厂.广东,广州(510280))∥国外分析仪器.技术与应用.—1995,(1).—80—82,76介绍一种固体悬浮物(SS)含量在线连续测量仪表-浊度计,它利用光波被固体反射和吸收的特性,通过测量光波通过介质前后光强度的变化,从而反映出介质中固体悬浮物含量。图6参3(严寒)TH744.4 96063987智能化散射式浊度仪的设计=Design of intelligentscattering tubidimeter[刊,中]/徐汉臣(上海仪器仪表研究所.上海)//仪表技术.—1995,(6).展开更多
文摘The in-situ instrumentation technique for measuring mercury and itsspeciation downstream a utility 100 MW pulverized coal (PC) fired boiler system was developed andconducted by the use of the Ontario hydro method (OHM) consistent with American standard test methodtogether with the semi-continuous emissions monitoring (SCEM) system as well as a mobile laboratoryfor mercury monitoring. The mercury and its speciation concentrations including participate mercuryat three locations of before air preheater, before electrostatic precipitator (ESP) and after ESPwere measured using the OHM and SCEM methods under normal operation conditions of the boiler systemas a result of firing a bituminous coal. The vapor-phase total mercury Hg(VT) concentration declinedwith the decrease of flue gas temperature because of mercury species transformation from oxidizedmercury to particulate mercury as the flue gas moved downstream from the air preheater to the ESPand after the ESP. A good agreement for Hg°, Hg^(2+) and Hg( VT) was obtained between the twomethods in the ash-free area. But in the dense particle-laden flue gas area, there appeared to be abig bias for mercury speciation owing to dust cake formed in the filter of OHM sampling probe. Theparticulateaffinity to the flue gas mercury and the impacts of sampling condition to accuracy ofmeasure were discussed.
文摘T H744.4 96063986用于废水处理后在线测量的一种浊度计=A newnephelometer for on——line measurement afterwaste water treatment[刊,中]/周伟强(广州造纸厂.广东,广州(510280))∥国外分析仪器.技术与应用.—1995,(1).—80—82,76介绍一种固体悬浮物(SS)含量在线连续测量仪表-浊度计,它利用光波被固体反射和吸收的特性,通过测量光波通过介质前后光强度的变化,从而反映出介质中固体悬浮物含量。图6参3(严寒)TH744.4 96063987智能化散射式浊度仪的设计=Design of intelligentscattering tubidimeter[刊,中]/徐汉臣(上海仪器仪表研究所.上海)//仪表技术.—1995,(6).
