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The Selection and Use of Gas Analyzers under Different Industry Conditions

1.Online gas analyzer

On-line gas analyzers are widely used in industrial installations and production processes, and can be installed at specific monitoring points to monitor specific gases. The online gas analyzer is more suitable for the continuous, long-term, online, and stable characteristics required for monitoring in process and technology. It needs to be selected according to the type and concentration of the gas on site, and the installation location is also the choice of the online gas analyzer One of the factors.

Online gas analyzers are often used in confined spaces, such as reaction tanks, storage tanks or containers, sewers or pipelines, tunnels, etc.

2Portable gas analyzer

The portable gas analyzer is easy to operate, small in size, and can be carried to different production locations for monitoring. Portable gas analyzers are often used in relatively open occasions, such as open workshops.

Types and characteristics of the measured gas

In the industrial production process, a large amount of combustible gas and harmful gas will be produced, among which combustible gas is mainly H2, CH4, CnHm (C2H2, C2H4, C2H6), etc., and the toxic and harmful gas are mainly CO, CO2, SO2, NOx, H2S, etc. . After CO, H2S, H2, etc. are mixed with air to reach the limit value, fire and explosion accidents are prone to cause casualties and equipment damage; the emission of CO2, SO2, NOx and other gases not only harms the human body, but also causes air pollution. Therefore, gas monitoring in industrial processes is very necessary.

  1. Oil & Gas

In the production process of oil and gas, a large amount of hydrocarbon gas, CO, H2S, etc. are produced, and the probability of accidents is high. Therefore, in order to protect the health and production safety of on-site workers, the oil and gas industries currently generally adopt gas detection and analysis methods to control, install gas analyzers to detect whether harmful gases are leaking, and monitor the surrounding environment of process equipment or storage and transportation facilities. The content of flammable and harmful gases.

Monitoring applications: exploration drilling platforms, production platforms, oil/gas storage stations, oil/gas pipelines, refineries, etc.

Monitoring gas: hydrocarbon gas, CO, H2S, etc.

  1. Coal chemical industry

In coal chemical production, coal gas is an inevitable product, and it contains harmful gases. When the concentration of toxic gas in coal chemical plants reaches or exceeds a safe value, accidents will occur. The gas analyzer can send out an alarm signal through real-time detection, and can activate external devices such as solenoid valves and exhaust fans to automatically eliminate hidden dangers.

Monitoring applications: coking, coal gasification-synthetic ammonia, coal-based methanol, coal-to-synthetic oil, coal chemical co-production and other industries.

Monitoring gas: O2, CO, CO2, CH4, H2, CnHm (C2H2, C2H4, C2H6), etc.

  1. Power plant

The main fuel of power plants in my country is coal, and the flue gas emissions of power plants have become one of the main fixed pollution sources in my country. The combustion of power plant boilers will produce a large amount of toxic and harmful gases, which will not only pollute the environment, but also affect the combustion efficiency of the boiler.

Monitoring applications: near furnaces and combustion furnaces, flue gas emission detection after flue gas purification devices, coal bins and coal mills, etc.

Monitoning gas: SO2, NO, CO, CO2, O2, etc.

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