Coating operation is one of the important means of product appearance decoration and quality protection, through the appropriate coating process can effectively prevent the occurrence of rust, corrosion, etc., and increase the aesthetics of the outer surface of the product. However, a variety of volatile chemical paints and solvents are used during the painting process, resulting in a large number of pungent odors in the vicinity of the paint park. These odorous gases are harmful to the environment and human health. In this article, we'll look at common odor contaminants in paint shops and how to monitor and manage them.
The main odorous pollutant gases in the coating industry are as follows:
1. Ammonia NH3
Colorless, strong, pungent odor gas;The occupational exposure limit is 20 mg m3 for PC-TWA and 30 mg m3 for PC-STELBorderline adverse health effects are eye and upper respiratory tract irritation.
2. Hydrogen sulfide H2S
Colorless, rotten egg-like gas;The occupational exposure limit MAC is 10 mg m3;The critical adverse health effects are neurotoxicity and intense mucosal irritation.
3. Ethyl acetate C4H8O2
Colorless transparent liquid, volatile vapor has a sweet taste, and has a pungent odor when the concentration is high;The occupational exposure limit is 200 mg m3 for PC-TWA and 300 mg m3 for PC-STELBorderline adverse health effects are upper respiratory tract and eye irritation.
4. Methyl ethyl ketone C4H8O
Colorless transparent liquid, volatile vapor has a special pungent odor;The occupational exposure limit is 300 mg m3 for PC-TWA and 600 mg m3 for PC-STELThe critical adverse health effects are eye and respiratory irritation.
5. Toluene C7H8
Colorless transparent liquid, volatile vapor has a special aromatic smell, and there is a pungent odor when the concentration is highOccupational exposure limits are 50 mg m3 for PC-TWA and 100 mg m3 for PC-STELThe critical adverse health effects are anesthetic effect and mucosal irritation.
6. Ethylbenzene C8H10
Colorless transparent liquid, volatile vapor has a special aromatic smell, and there is a pungent odor when the concentration is highThe occupational exposure limit is 100 mg m3 for PC-TWA and 150 mg m3 for PC-STELCritical adverse health effects include upper respiratory tract and eye irritation, and central nervous system damage.
7. Styrene C8H8
Colorless, transparent, oily liquid with a high concentration of volatile vapors or an unpleasant odor when mixed with other chemicals;Occupational exposure limits are 50 mg m3 for PC-TWA and 100 mg m3 for PC-STELCritical adverse health effects are upper ocular respiratory tract irritation, neurasthenia, and peripheral nerve symptoms.
In order to reduce or control the emission and diffusion of odors in the paint shop, it is necessary to install the ERUN-QZ9391 stationary odor gas monitoring system. The system can realize continuous real-time monitoring of the concentration value of the above-mentioned odorous pollutant gases, and wirelessly transmit the data to the cloud platform monitoring system of the local environmental protection department. Through the collection and analysis of monitoring data, the odor problem in the coating workshop can be found and dealt with in a timely manner, and the coating enterprises can be urged to take corresponding measures to reduce or control the emission of odor.
In addition to the odor pollutants of the main typical coating processes mentioned above, volatile organic compounds such as ethanol, methyl isobutanone, and butyl acetate are also present in the coating process. These substances can also have an impact on the environment and human health. Therefore, when selecting the odor gas monitoring equipment in the coating park, it can be considered to increase the eight odor pollutant detection indicators and dimensionless OU odor concentration values specified in GB 14554. This allows for more comprehensive monitoring and management of odor problems in the paint shop.
In short, the odor problem in the paint shop is an environmental problem that needs to be paid attention to. By understanding the common odor pollutants in the paint shop and using the odor gas monitoring system for monitoring and management, we can effectively reduce or control the emission and diffusion of odor and protect the environment and human health. At the same time, customers should consider adding other volatile organic compounds detection indicators when selecting odor gas monitoring equipment in the coating park to achieve more comprehensive monitoring and management.