Use environmental protection testing arrangement in minimum discharge

The utility model discloses an use environmental protection testing arrangement in minimum discharge, characterized by are the array and arrange each sampling point on the horizontal gas pass cross-section of chimney entry, form multi point sampled on the chimney entry horizontal gas pass cross-section, obtain the sampling flue gas on the variant sampling point, sampling flue gas on the variant sampling point through each sampling pipe leading-in sampling channel jointly, sets up metal probe net respectively in the sampling channel, the online collision current signal that produces of metal probe utilizes the sensor to enlarge, conveys to microprocessor again and (carries out signal processing, obtain the test data of particulate matter volume, utilize the flue gas analysis appearance to obtain about gaseous pollutant SO2 and NOx's the concentration and the test data of flue gas volume in the flue gas to the output flue gas through metal probe net, it carries out digital process to test data to set up the digital control unit. The utility model discloses can avoid in the flue gas steam to the interference of test result, can extensively be used for the CEMS of thermal power plant's low concentration flue gas to compare the monitoring.