高温氨逃逸激光原位监测的浓度反演算法

对烟气脱硝后的氨逃逸进行准确、灵敏、快速监测，避免氨气对环境的二次污染是工业和环保领域的工作重点之一。选择氨气1.53 m 的单根吸收谱线为目标谱线，结合可调谐半导体激光吸收光谱技术（TDLAS）和波长快速扫描技术研究了高温烟气氨逃逸原位监测方法，并设计了相应的开放光路测量系统。分析了高温环境下温度对测量的影响，研究了温度修正方法，并设计了烟道现场氨浓度免定标精确反演算法，由实验得出最大相对检测误差为1.5%。通过工业现场的安装运行验证了文中系统的工程实用性和算法的可靠性，对于我国工业脱硝过程的监控和烟气安全排放起有效的技术支持。

Concentration inversion algorithm in ammonia slip monitoring in situ based on laser technology in high temperature

Accurately, sensitively and rapidly monitoring of ammonia slip after the flue gas denitration to avoid ammonia secondary pollution of the environment is one of the focuses in industrial and environmental fields. This research chose the absorption line of ammonia molecules near 1.53 m as the goal line, studied the ammonia slip in situ monitoring method of high temperature flue gas through TDLAS technology and wavelength fast scanning technology, and designed the corresponding open-path measurement system. This research analyzed the temperature influence on measurement in the high temperature environment, studied the temperature correction method, designed an ammonia concentration accurate inversion algorithm which avoided calibration in flue-site and obtained the maximum relative detection error which is 1.5% by laboratory experiments. The engineering practicability and reliability of the algorithm of the system is proved by industrial field installation and operation. It will provide the effective technical support in industrial denitration process monitoring and the flue gas emissions in safety in our country.