This utility model discloses an online particulate matter monitoring device suitable for high-temperature
flue gas, relating to the field of online particulate matter monitoring technology. The device includes a monitoring frame, a motor fixedly mounted on top of the frame, a
drive shaft fixedly mounted on the output end of the motor, and fan blades fixedly mounted on the circumferential surface of the
drive shaft. It also includes a monitoring device and a dust scraping device. The monitoring device comprises a crossbar, an electrostatic
detector, a guide plate, a fixing plate, a receiving rod, and a sliding plate. The crossbar is fixedly mounted on the inner wall of the monitoring frame, and the electrostatic
detector is fixedly mounted above the crossbar. This effectively removes particulate matter adhering to the surface of the electrostatic
detector, preventing surface particulate matter from affecting the accuracy of subsequent monitoring, and also preventing the sliding plate from constantly contacting the surface of the electrostatic detector, thus avoiding interference with subsequent monitoring results.