Online Monitoring System for OSEN-NOX Nitrogen Oxide Emissions from Steel Plants-Global supplier

3rd Floor, Building A, Fuchunhui Technology Park, No. 21 Lingbei 6th Road, Fenghuang First Industrial Zone, Bao'an District, Shenzhen

The current situation of nitrogen oxide emissions in China in recent years:

1. In recent years, the nitrogen oxide emissions from energy related departments in China have rapidly increased. In 2000, the national nitrogen oxide emissions were 12.1X10⁶t， By 2005, it had increased to 19.1X10⁶t， Annual growth rate of 10%.

2. If further emission reduction measures are not taken, with the development of the national economy, population growth, and the acceleration of urbanization, China's nitrogen oxide emissions will continue to increase in the future. According to the current development trend, the emissions will reach 35.4X10 by 2030⁶t， It will inevitably cause serious environmental impacts, therefore, it is necessary to effectively strengthen the control of nitrogen oxide emissions.

Introduction to nitrogen oxides

Nitrogen oxidesIt refers to only nitrogenoxygenA compound composed of two elements. Common nitrogen oxides includenitric oxide(NO, colorless)nitrogen dioxide（NO₂, reddish brown), nitrous oxide (N₂O）、dinitrogen pentoxide（N₂O₅）Among them, except for dinitrogen pentoxide which is a solid under normal conditions, all other nitrogen oxides are in a gaseous state under normal conditions. Nitrogen oxides (NO)_x）There are many types, causingair pollutionThe main components are nitric oxide (NO) and nitrogen dioxide (NO)₂）Therefore, in environmental science, nitrogen oxides generally refer to the general term for these two.

Sources of nitrogen oxides:

Natural emissions of NO_xIt mainly comes from the decomposition of organic matter in soil and oceans, and belongs to the natural nitrogen cycle process. Most of the NO emitted from human activities comes fromfossil fuelThe combustion process, such ascar、aircraftInternal combustion engines andIndustrial kilnsThe combustion process; It also comes from the production and use of nitric acid processes, such as nitrogen fertilizer plants, organic intermediate plants, and non-ferrous metalsferrous metalSmelting plants, etc. According to 80 yearsInitially estimated, the world emits NO into the atmosphere every year due to human activities_xAbout 53 million tons. NO_xThe damage to the environment is extremely significant. It is not only one of the main substances that form acid rain, but also an important substance that forms photochemical smog in the atmosphere and consumes O₃An important factor.

Under high-temperature combustion conditions, NO_xMainly existing in the form of NO, the initially emitted NO_xNO accounts for about 95%. However, NO is highly reactive with oxygen in the atmosphere, producingNO₂Therefore, NO in the atmosphere_xGenerally speaking, NO₂The form exists. NO and NO in the air₂pass throughphotochemical reactionTo achieve balance through mutual transformation. When the temperature is high or there are clouds and mist present, NO₂Further interaction with water molecules forms the second important acid component in acid rain - nitric acid (HNO)₃）. When there is a catalyst present and appropriate meteorological conditions are added, N0₂The rate of conversion to nitric acid accelerates. Especially when NO₂With SO₂When present simultaneously, they can catalyze each other and form nitric acid at a faster rate.

In addition, NO_xIt can also be due to the aircraft's presencestratosphereThe emission of exhaust gas gradually accumulates, leading to an increase in its concentration. NO_xFurthermore, O in the stratosphere₃Reaction occurs to generate NO and O₂， NO and O₃Further reaction to generate NO₂And O₂Thus breakingO₃Balance, make O₃The decrease in concentration leads to O₃The depletion of layers.

Product Introduction of Osen Nitrogen Oxide Online Monitoring System:

To promote the construction of ecological civilization and implement the leadership of Jiqi【In accordance with the spirit of Document No. 177 of 2018, further deepening the control of boiler pollution and reducing nitrogen oxide emissions, Ausen has launched the OSEN-NOX nitrogen oxide online monitoring system, which is mainly used for the detection and analysis of nitrogen oxides in gas boiler exhaust gasGas fired boiler after low nitrogen combustion transformation of existing coal-fired boilers. Applicable toGas boilers with a capacity of less than 20 tons per hour, low nitrogen combustion retrofit boilers, replacement of low nitrogen burner boilers, and overall replacement of boilers emit nitrogen oxide exhaust gas. The low nitrogen burner refers to the use of full range mixed burners, staged burners (with smoke recirculation devices), and other methods for nitrogen oxide exhaust gas analyzers.

OsenThe composition of the OSEN-NOX nitrogen oxide online monitoring system:

(1) OSEN-NOX analyzer host (mandatory)

(2) Gas sampling device (mandatory)

(3) Nitric oxide analyzer (required)

(4) Nitrogen dioxide analyzer (required)

(5) Oxygen analyzer (required)

(6) Sample gas pretreatment unit (optional)

(7) Gas analysis unit (mandatory)

Monitored Parameters	measuring range	resolution	accuracy	measuring principle
Oxygen content (O2)	0~25Vol.%	0.1%	±0.5%	electrochemistry
Nitric oxide (NO)	0~100ppm	0.5ppm	±2%FS	electrochemistry
Nitrogen dioxide (NO2)	0~500ppm	0.5ppm	±2%FS	electrochemistry
Sulfur dioxide (SO2)	0~20ppm	0.2ppm	±2%FS	electrochemistry
temperature	-40~85℃	0.01℃	±2.5%FS	Pt100 sensor
humidity	0~99%RH	0.04%RH	±3%RH	Semiconductor sensors