Exhaust gases from factories must be treated accordingly to protect the environment and human health. The treatment methods and measures for exhaust gases vary according to different factories and the composition of the exhaust gases, but the following treatment methods are usually required:
Source control of exhaust gases
Reduce or avoid the generation of exhaust gases by optimizing the production process, improving the equipments, and increasing the efficiency of energy use.
Waste gas collection
Collecting waste gases at the source prevents them from spreading within the plant and facilitates subsequent treatment.
Waste gas treatment
The collected waste gas is treated to meet emission standards. Exhaust gas treatment methods include physical, chemical and biological treatment.
Common exhaust gas treatment methods include:
Flue gas desulfurization, denitrification and dust removal
Activated carbon adsorption
Membrane separation technology
Photocatalytic oxidation
Bio-filter treatment, etc.
Exhaust emission
Treated exhaust gas shall meet the relevant national and local standards before emission. Waste gas emissions should be in line with relevant emission standards, such as the national "Air Pollutant Emission Standards" and so on.
It should be noted that different industries, processes and factories have different exhaust gas composition and emissions, and different requirements for exhaust gas treatment. Therefore, for specific factory exhaust gas treatment, should be based on the actual situation for comprehensive consideration and treatment.