This utility model discloses a device for single-meter and mixed-meter measurement of
denitrification flue gas. It includes multiple sets of sampling pipelines installed on the
denitrification flue. These pipelines are arranged sequentially along the
flue gas flow direction within the flue and are equally spaced. All pipelines are connected to the same sample
gas chamber. A fan is installed on the top wall of the sample
gas chamber's inner cavity. The sample
gas chamber is connected to a connecting
pipe that communicates with its inner cavity, and a
NOx analyzer is connected through this connecting
pipe. This utility model utilizes multiple sets of sampling pipelines to extract
flue gas from different locations within the
denitrification flue and, in conjunction with the
NOx analyzer, achieves multi-point single-meter monitoring, reducing the cost of multi-point
NOx concentration measurement. Furthermore, the equally spaced sampling pipelines facilitate the acquisition of NOx concentration variations within the area. The sample gas chamber and fan ensure thorough mixing of multiple
flue gas streams, meeting the requirements for mixed-meter measurement.