Industrial waste gas pollution hazards and treatment: Industrial waste gas pollution is mainly caused by human beings burning fossil fuels (coal and oil) during production and living activities, rock drilling, blasting during mining, building materials crushing, screening, smelting and casting. Air pollutants mainly include dust particles, carbon dioxide, sulfur dioxide or nitrogen oxides.
Common treatment methods for industrial waste gas:
The technology of industrial waste gas treatment of pollutants varies with pollutants. Industrial waste gas treatment refers to the work of pre-treatment of waste gas generated in industrial places such as factories and workshops before external discharge to meet the national emission standards.
The principles of industrial waste gas treatment include activated carbon adsorption, catalytic combustion, catalytic oxidation, acid-base neutralization, and negative ion methods. The exhaust gas treatment tower adopts a five-fold exhaust gas adsorption filtration purification system, and the industrial waste gas treatment design is careful, and the layers are purified and filtered, and the effect is good.
1. Catalytic combustion method:
The method utilizes a certain catalyst to decompose or burn the organic exhaust gas to become a harmless gas. The disadvantage is that organic matter cannot be recycled, only inputs, without any economic benefits.
2. Absorption method:
The method absorbs organic waste gas with a specific chemical liquid and then separates it. The recovery rate of this method is too low, and the limitations are also large. Because the initial investment and operating costs are high, the economic benefits are not obvious.
3. Adsorption method:
The method is mainly based on physical adsorption of activated carbon, and has the characteristics of wide application range, low operating cost, recyclability and remarkable economic benefits. Activated carbon adsorption method is divided into two methods: activated carbon particle adsorption and activated carbon fiber adsorption. In comparison, activated carbon fibers are more economical and effective than activated carbon particles as an emerging adsorbent material.
4, negative ion high voltage electrostatic purification method:
The method is mainly based on negative ion high-voltage electrostatic purification adsorption, and the application range is wider than industrial fume purification treatment generated by the processing industry workshop, and the operation cost is low, the recycling can be utilized, and the economic benefit is remarkable.
Industrial waste gas hazards:
1. Harm to human health: According to the World Health Organization, air pollution caused about 7 million deaths in 2012 (some of the causes of death are related to indoor/outdoor air pollution), that is, one in every eight dead people in the world. The harm of air pollutants to the human body is multi-faceted. The main manifestations are respiratory diseases and physiological dysfunction, as well as mucosal tissues such as the eyes and nose are stimulated and sick.
2. Hazards to plants: Air pollutants, especially sulfur dioxide and fluoride, are very harmful to plants. When the concentration of pollutants is high, it will cause acute damage to plants, causing damage on the surface of plant leaves, or directly causing leaves to wither and fall off; when the concentration of pollutants is not high, it will cause chronic damage to plants, causing plant leaves to chlorotic. Or, on the surface, no harmful symptoms can be seen, but the physiological functions of the plants have been affected, resulting in a decrease in plant yield and deterioration in quality.
since 2004
