Online detection system and method for ammonia gas concentration plane distribution at outlet of SCR

• Main Authors: ZOU LICHANG, LI ZHENGHUI, YAO SHUNCHUN, SHEN YUELIANG, LU ZHIMIN, QIN HUAIQING
• Format: Patent
• Language: Chinese; English
• Published: 27.11.2018
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses an online detection system and method for ammonia gas concentration plane distribution at an outlet of SCR. The detection system comprises a sampling module, a flue gas pre-treatment module, a laser detection module and a data processing module; after the sampling module carries out lattice sampling in flues in more than two sides, the multiple channels of flue gas are introduced to the flue gas pre-treatment module for pre-treatment such as dedusting, the laser detection module detects the multiple channels of flue gas with laser at the same time, and NH3 concentrationvalues of the multiple channels of flue gas are calculated synchronously through processing the multiple channels of detection signals by the data processing module, and a plane distribution result of NH3 concentration is obtained. The system and method can accurately measure NH3 concentration at the outlet of the SCR denitrifying system. The detection signals of the multiple channels of flue gascan be generated at the s