December 22, 2024

Waste gas treatment technology against haze

Introduction: The haze weather is an atmospheric pollution state. The haze mainly consists of sulfur dioxide, nitrogen oxides, and respirable particulate matter. Together with the fog, they make the sky become dark and gray. In particular, PM2.5 (particles with an aerodynamic equivalent diameter of 2.5 μm or less) are considered to be the “culprits” causing haze.

Waste gas treatment technology against haze

With the deterioration of air quality, the haze weather phenomenon has increased and the damage has increased. In many parts of China, haze weather phenomena have been incorporated into fog as a warning and forecast of severe weather. Collectively referred to as "haze weather."

In addition to meteorological conditions, the concentration of atmospheric particulates (including PM10 and PM2.5) caused by industrial production, motor vehicle exhaust emissions, and winter heating coal combustion is an important factor in smog production. Nowadays, the emission levels of pollutants in many cities have already reached a critical point. They are very sensitive to weather conditions, and air quality can meet standards when diffusion conditions are good. Once adverse weather conditions are encountered, air quality and visibility will immediately decline.

UV purification of industrial waste gas

Industrial production produces large amounts of organic waste gas with pungent odors. Industrial exhaust gas is also one of the culprits causing severe haze.

As an energy-saving and environmentally-friendly solution for treating industrial exhaust gases, ultraviolet light can reduce odor, purify exhaust gas, eliminate any chemicals, and eliminate high temperatures. When combined with natural oxygen (O2), UV light produces highly reactive radicals and ozone, which are characteristically bound to organic substances (such as solvents) and oxidize them. During this process, harmful substances (such as odors, volatile organic solvent and chemicals) in the air will be removed.

The 185 nm wavelength UV is mainly used for advanced oxidation. (VUV vacuum UV section)

UV light at 254 nm is mainly used for oxidation and sterilization.

Decomposition of volatile organic compounds (VOCs)

Reduce odor

Through photolysis, high-energy ultraviolet photons can destroy chemical bonds in molecules and decompose them into components that do not affect the environment. The vacuum ultraviolet radiation at a wavelength of 185 nm decomposes organic molecules by direct photolysis; nature is the way to purify many pollutants in the air.

Ultraviolet radiation has many functions, such as decomposing harmful substances in industrial exhaust gases, decomposing grease in oil fumes, reducing odors in oil fumes, purifying waste water, cleaning surfaces, and the like.

Process advantages

Reliable operation, long life, high efficiency

No secondary pollution

No emission problem

Reduce irritating odors

Fast maintenance and low cost

Energy saving, low operating costs

Flexible solution, modular design

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