实测南昌地铁1号线隧道内约200趟列车通过邻近非减振与减振断面的振动响应。基于不同振动评价标准,从统计角度分析了不同车次列车运行对时域和频域的影响、测点位于隧道壁不同高度对振动源强值及钢弹簧浮置板减振量评价的影响。分析结...实测南昌地铁1号线隧道内约200趟列车通过邻近非减振与减振断面的振动响应。基于不同振动评价标准,从统计角度分析了不同车次列车运行对时域和频域的影响、测点位于隧道壁不同高度对振动源强值及钢弹簧浮置板减振量评价的影响。分析结果表明:钢弹簧浮置板隧道壁上的减振效果明显,但浮置板本身的振动响应大幅增加。不同车次对各测点低频段及隧道壁高测点影响较大,但对Z振级影响较小。振动在隧道壁上低频段有所放大。由隧道壁低测点测得的最大Z振级最适合评价地铁源强值,南昌地铁实测源强值为76.66 d B。不同高度测点及不同评价标准对浮置板减振量评价有较大影响,建议采用低测点最大Z振级评价浮置板减振量。展开更多
HCl and SO_2 emission is one of the major concerns related to municipal solid waste incinerator(MSWI). In this study, a material flow analysis model was developed to estimate the HCl and SO_2 concentrations in the MSW...HCl and SO_2 emission is one of the major concerns related to municipal solid waste incinerator(MSWI). In this study, a material flow analysis model was developed to estimate the HCl and SO_2 concentrations in the MSWI flue gases(FGs), and their concentrations in the full-scale MSWI were monitored. The calculated concentrations of HCl and SO_2 in the FG were 770–1300 mg/Nm^3 and 150–640 mg/Nm^3, respectively, in close agreement with the monitored values. More than 99% of Cl and 92% of S from the FG were captured into solid residues by the air pollution control(APC) systems. Moreover, since only 48.4%–67.5% of Cl and 21.3%–53.4% of S were transferred to the FG from the municipal solid waste(MSW), it was more reliable to estimate the source strengths and release amounts of HCl and SO_2 in the FG based on the amounts of Cl and S in the APC residues(AR) and exhaust gas rather than in the MSW. This simple method is easily applicable and the estimated results could provide scientific basis for the appropriate design and operation of the APC systems as well as corrosion control of heat recovery systems.展开更多
文摘实测南昌地铁1号线隧道内约200趟列车通过邻近非减振与减振断面的振动响应。基于不同振动评价标准,从统计角度分析了不同车次列车运行对时域和频域的影响、测点位于隧道壁不同高度对振动源强值及钢弹簧浮置板减振量评价的影响。分析结果表明:钢弹簧浮置板隧道壁上的减振效果明显,但浮置板本身的振动响应大幅增加。不同车次对各测点低频段及隧道壁高测点影响较大,但对Z振级影响较小。振动在隧道壁上低频段有所放大。由隧道壁低测点测得的最大Z振级最适合评价地铁源强值,南昌地铁实测源强值为76.66 d B。不同高度测点及不同评价标准对浮置板减振量评价有较大影响,建议采用低测点最大Z振级评价浮置板减振量。
基金supported by the National Natural Science Foundation of China (No.21577102)the Major Science and Technology Program for Water Pollution Control and Treatment (No.2017ZX07202005)the Fundamental Research Funds for the Central Universities (No.22120170050)
文摘HCl and SO_2 emission is one of the major concerns related to municipal solid waste incinerator(MSWI). In this study, a material flow analysis model was developed to estimate the HCl and SO_2 concentrations in the MSWI flue gases(FGs), and their concentrations in the full-scale MSWI were monitored. The calculated concentrations of HCl and SO_2 in the FG were 770–1300 mg/Nm^3 and 150–640 mg/Nm^3, respectively, in close agreement with the monitored values. More than 99% of Cl and 92% of S from the FG were captured into solid residues by the air pollution control(APC) systems. Moreover, since only 48.4%–67.5% of Cl and 21.3%–53.4% of S were transferred to the FG from the municipal solid waste(MSW), it was more reliable to estimate the source strengths and release amounts of HCl and SO_2 in the FG based on the amounts of Cl and S in the APC residues(AR) and exhaust gas rather than in the MSW. This simple method is easily applicable and the estimated results could provide scientific basis for the appropriate design and operation of the APC systems as well as corrosion control of heat recovery systems.
