Application of UV Lamp in Industrial Waste Gas Treatment

1. Principle of UV lamp in waste gas treatment


Ultraviolet photolysis and plasma technology are two commonly used methods for the degradation of organic waste gas today. Using these two methods, the organic components in the exhaust gas can be decomposed into harmless water and carbon dioxide, and secondary pollution can be prevented. However, these two methods still have their own advantages and disadvantages. UV lamp decomposing waste gas treatment technology uses high-energy and high-ozone UV light beams to decompose oxygen molecules in the air to generate free oxygen, that is, active oxygen. Because free oxygen is unstable, it needs to be combined with oxygen molecules to generate ozone. UV+O2→O-+O* (active oxygen) O+O2→O3 (ozone), it is well known that ozone has a strong oxidizing effect on organic matter, and has a very obvious removal effect on malodorous gases and other waste gases.


2. Application of UV lamps in industrial waste gas treatment


Industrial waste gas refers to the general term for various pollutant-containing gases emitted into the air during the production process of fuel combustion plants, including carbides, sulfides and soot. From the morphological analysis, industrial waste gas can be divided into particulate waste gas and gaseous waste gas. These waste gases are discharged into the atmosphere to pollute the air, and enter the human body through different breathing routes. After accumulation, they will seriously endanger human health, mainly manifested as respiratory system diseases and physiological dysfunction, as well as mucosal tissues such as eyes and nose are affected by stimulation, and different substances will have different effects.


It is not easy to deal with exhaust gas, mainly because of the complex composition of exhaust gas, fast gas diffusion and large emission. After the emergence of the ultraviolet photolysis treatment method, the waste gas treatment has become relatively easy, because the purification efficiency of the industrial UV lamp solution is high, the area is small, and the operation and maintenance cost is very low.


The 185nm irradiated light emitted by the UV lamp irradiates the exhaust gas, and cracks the exhaust gas such as ammonia, trimethylamine, hydrogen sulfide, methyl sulfide, methyl mercaptan, methyl sulfide, carbon disulfide styrene, VOCs, and the molecular chain of organic or inorganic polymer pollutants is cracked under the irradiation of high-energy ultraviolet beam and oxidized into small molecular compounds.


The high-energy ultraviolet beam of high-energy UV lamp and ozone are used to decompose and oxidize the odor gas, so that the odor gas is degraded and transformed into low molecular compounds, water and carbon dioxide, and then discharged through the air duct. The decomposed industrial waste gas can be discharged innocuously without secondary pollution.

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