The utility model discloses an anti-blocking
system for a flow meter of a hot air pipeline of a
sludge incineration boiler, belongs to the technical field of hot air pipelines of boilers, and solves the problems that the accuracy of air quantity measurement is obviously reduced due to deposition and blockage of static pressure and
dynamic pressure guide holes of an air quantity sensor, and further normal operation of the boiler is possibly interfered. And even the
boiler efficiency can be reduced, faults occur frequently, and finally great economic losses are caused. Comprising a vertically-arranged air duct, an
air volume sensor fixedly connected to the
peripheral wall of the air duct and an air pipeline communicating the
air volume sensor with the air duct, and further comprises an anti-blocking
assembly. The
electromagnet is controlled to be powered on to generate magnetic force, the
metal spring is compressed to drive the
piston to move, the gas storage volume is increased, more gas is sucked, the
electromagnet is powered off after the valve is closed, the spring releases elastic force to enable the
piston to reversely push the gas, the gas and possibly-blocked
solid particles are discharged through the connecting
pipe, and the accuracy of the
air volume sensor is kept. The boiler working efficiency is ensured.