Slag poking device for circulating fluidized bed boiler

The utility model provides a slag poking device for a circulating fluidized bed boiler. The slag poking device comprises a limiting sleeve, an observation sleeve, a laser sensor, a slag poking mechanism, a central processing unit, a PLC (Programmable Logic Controller), a control cabinet and a frequency converter, according to the device, the laser sensor penetrates through the observation sleeve to monitor the distance between the inclined section of the slag falling pipe and the pipe wall below the joint of the hearth, the blockage condition of the joint of the inclined section of the slag falling pipe and the hearth is monitored in real time, a monitoring signal is sent to the central processing unit in real time, and an instruction is sent to the PLC after the monitoring signal is analyzed by the central processing unit; meanwhile, the rotating direction and the rotating speed of a motor in the slag poking mechanism are controlled by the PLC, and the PLC can adjust the slag poking mechanism to conduct dred