PID adjusts sand return controlling means based on siege pressure

The utility model provides a PID adjusts sand return controlling means based on siege pressure relates to a sand return device. It has solved the problem that causes the caking putty among the prior art easily. This PID adjusts sand return controlling means based on siege pressure including siege pressure measurement, sand return hoisting device, still includes the PID controller according to siege pressure measurement information control sand return hoisting device, and sand return hoisting device promotes the material loading machine for the chain bucket, and the chain bucket promotes the material loading machine and sets up in the shaft, is provided with below the shaft to transport the conveyer belt in the chain bucket with the sand body, be provided with on the shaft with the sand inlet pipe of boiler UNICOM, sand inlet pipe is by setting up downwards to the slope of boiler siege on the shaft. The utility model discloses can control combustion processes according to the pressure control sand return of si