1results about How to "Guaranteed denitrification efficiency" patented technology

The application discloses a thermal power plant SCR denitration system ammonia injection grid self-adaptive control method and system, including ammonia injection grid module, thermal impedance monitoring module, sound wave tomography module, differential pressure monitoring module, sound wave cleaning module and central control module, the central control module identifies the ash branch according to the temperature response curve collected by the thermal impedance monitoring module, according to the sound wave signal collected by the sound wave tomography module, the ammonia concentration distribution field and the temperature distribution field are reconstructed, the differential pressure signal collected by the differential pressure monitoring module is extracted spectrum characteristics, the influence of the ash branch on the injection uniformity or the catalyst layer stability is verified comprehensively, and the cleaning target branch is determined. The application realizes the on-line perception of the ammonia injection branch state, the visual monitoring of the injection uniformity, the early diagnosis of the catalyst layer flow instability, the thermal-acoustic resonance self-cleaning and the closed-loop intelligent control of the predictive maintenance, effectively improves the denitration efficiency, reduces the ammonia escape and prolongs the equipment life.