Intelligent Multi-point Sampling System of SCR Denitration Optimizing Ammonia Injection Control Technology in Thermal Power Unit

Aiming at the problem that the measured data of CEMS for denitration in coal-fired power plant can not reflect the real concentration of NOx, an intelligent multi-point sampling system is designed to make the sampling data of NOx at denitration outlet representative. The test results show that the average cross-section concentration measured by SCR intelligent multi-point sampling system can meet the accuracy requirements of operation monitoring and environmental protection monitoring, ensure the timeliness and accuracy of the measurement data, and feed back the SCR outlet NOx concentration signal to the ammonia injection operation control in advance, so as to maintain the safe and stable operation of the unit.