NOx分析仪转换效率检查方法研究

Reseach of efficiency check method of NOx analyzer converter

为了解决氮氧化物(NOx)分析仪二氧化氮转换器转换效率的检查问题,将气体分割器(GDC)应用到转换效率检查中,GDC-703与NOx分析仪组合成多种工作状态,通过NOx分析仪测量出了不同工作状态下的NO浓度,按照算法公式计算出了NO2转换器的转换效率;介绍了NOx分析仪的化学发光法检测原理和NOx转换效率检查的必要性,提出了利用GDC-703对NOx分析仪进行转换效率检查的方法;通过对转换效率检查过程分解和浓度分析,从理论上证明了该效率检查方法的正确性和优点,推导了转换效率的计算公式,指出在NOx效率检查中,GDC-703的实质作用是提供一个外置的臭氧发生器。研究结果表明,该NOx分析仪转换效率检查方法减小了分析仪固有测量误差对计算结果的影响,使检查结果更加准确可靠。

Aiming to solve the problem that how to accurately measure NO2 converter efficiency of NOx analyzer, gas divider cutter （ GDC- 703 ） was applied. GDC-703 and NOx analyzer combination makes a variety of working modes. NOx analyzer measured NO concentrations in different working modes. In accordance with the algorithm formula, NO2 converter efficiency can be calculated. The NOx analyzer measurement principle, chemical light detection, the necessity of NO2 converter efficiency by checking were introduced. It was put forward that using GDC-703 to check NO2 converter efficiency. Through converter efficiency by checking process decomposition and NO concentration analysis every phase, the efficiency check method was theoretically proved correct and advantageous, the calculation formula of conversion efficiency was deduced. In NO2 converter efficiency check, the essential function of GDC-703 is as an external ozone generator. Checking test results show that this method can reduce the effect on calculation results from analyzer intrinsic measured error, makes test results accurate and reliable.