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In recent years, the serious problem of air pollution has drawn public attention, and there is an increasing focus on air quality. Although there are natural factors contributing to air pollution, it is mainly caused by human activities, specifically the continuous release of dust and exhaust gases into the atmosphere by industries, transportation, and human daily life. Therefore, practical measures should be taken to strictly control the emission of pollutants into the atmosphere. Taking the petrochemical industry as an example, let’s briefly discuss flue gas pollution on Gongcaiwang. The petrochemical industry, especially during the oil refining process, generates a certain amount of toxic and harmful fumes and gases. These smoke and exhaust gases have three sources: 1. Fuel combustion, such as the exhaust gases from internal combustion engines, the flue gases from heating furnaces, and the flue gases resulting from coal powder combustion in the heat generation plants used by oil fields and refineries ； 2. These are gases that volatilize, are emitted, or leak at the wellhead during oil and gas exploration, transportation, storage, and processing; gases that leak from oil pipelines and tanks; non-condensable gases; gases released from the production units in refineries and petrochemical plants as well as gases resulting from chemical reactions; and foul and harmful gases emitted during the treatment and transportation of wastewater and other waste materials ； 3. Gaseous waste (volatiles from paints and coatings, etc.). From machinery factories and other processing plants (pipeline stations, etc.) affiliated with oil and gas companies. The processing capacity of petroleum refining units is typically in the millions of tons per year; as a result, the amount of waste gas emitted is large, and the pollutants involved are complex, diverse in type, with emissions concentrated in certain areas. Pollutants emitted can be detected up to 2 kilometers from the manufacturing plant. The regenerated flue gas emitted from the catalytic cracking units in refineries contains dust, hydrocarbons, nitrogen oxides, and sulfur dioxide. Since the emission height is generally around 100 meters, the range of pollutant dispersion is large. Since refining is an energy-intensive industry, saving energy and reducing consumption while improving economic efficiency have become goals for refining companies. For the flue gas from combustion furnaces, analyzing its composition allows one to understand the combustion conditions in the furnace, thereby optimizing operating conditions to achieve optimal fuel combustion ； For the analysis of flue gas from catalytic combustion, by measuring the components of the flue gas, it is possible to calculate the hydrocarbon ratio of the catalyst, determine the degree of coking in the catalyst, and use these data to optimize the installation in order to achieve the best economic benefits. Therefore, flue gas analysis is a very important technical indicator in the petroleum refining industry. According to Gongcaiwang, the measurement instruments commonly used in flue gas analysis are flue gas analyzers and hydrocarbon sensors. For example, the infrared hydrocarbon sensor module NG2-D-2 from the Italian company Novasis, which is distributed by Gongcaiwang, can perform automatic temperature compensation, and can be easily integrated into existing measurement systems or monitoring devices as needed ； Equipped with original chips that feature wireless transmission, a charging system, energy recovery, and sensor fault diagnosis capabilities.