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Comparative Study of Gas-Analyzing Systems Designed for Continuous Monitoring of TPP Emissions

机译：用于连续监测TPP排放的气体分析系统的比较研究

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Determining the composition of combustion products is important in terms of both control of emissions into the atmosphere from thermal power plants and optimization of fuel combustion processes in electric power plants. For this purpose, the concentration of oxygen, carbon monoxide, nitrogen, and sulfur oxides in flue gases is monitored; in case of solid fuel combustion, fly ash concentration is monitored as well. According to the new nature conservation law in Russia, all large TPPs shall be equipped with continuous emission monitoring and measurement systems (CEMMS) into the atmosphere. In order to ensure the continuous monitoring of pollutant emissions, direct round-the-clock measurements are conducted with the use of either domestically produced or imported gas analyzers and analysis systems, the operation of which is based on various physicochemical methods and which can be generally used when introducing CEMMS. Depending on the type and purposes of measurement, various kinds of instruments having different features may be used. This article represents a comparative study of gas-analysis systems for measuring the content of polluting substances in exhaust gases based on various physical and physicochemical analysis methods. It lists basic characteristics of the methods commonly applied in the area of gas analysis. It is proven that, considering the necessity of the long-term, continuous operation of gas analyzers for monitoring and measurement of pollutant emissions into the atmosphere, as well as the requirements for reliability and independence from aggressive components and temperature of the gas flow, it is preferable to use optical gas analyzers for the aforementioned purposes. In order to reduce the costs of equipment comprising a CEMMS at a TPP and optimize the combustion processes, electrochemical and thermomag-netic gas analyzers may also be used.
机译：从控制发电厂向大气中的排放以及优化发电厂中燃料燃烧过程的角度来看，确定燃烧产物的组成很重要。为此，需要监测烟道气中氧气，一氧化碳，氮气和硫氧化物的浓度。在固体燃料燃烧的情况下，粉煤灰浓度也受到监控。根据俄罗斯新的自然保护法，所有大型TPP均应配备持续向大气排放的监测和测量系统（CEMMS）。为了确保连续监测污染物排放，可使用国产或进口的气体分析仪和分析系统进行全天候直接测量，其运行基于各种理化方法，通常可以在介绍CEMMS时使用。根据测量的类型和目的，可以使用具有不同特征的各种仪器。本文代表了一项基于各种物理和理化分析方法的用于测量废气中污染物质含量的气体分析系统的比较研究。它列出了气体分析领域常用方法的基本特征。事实证明，考虑到需要长期，连续运行气体分析仪来监测和测量排放到大气中的污染物，以及对可靠性和与腐蚀性成分和气流温度无关的要求，因此为了上述目的，最好使用光学气体分析仪。为了降低在TPP上包含CEMMS的设备的成本并优化燃烧过程，还可以使用电化学和热磁气体分析仪。

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