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isolation
Isolation is to prevent workers from being directly exposed to harmful environments through measures such as sealing and setting up barriers. The most common isolation method is to completely enclose the equipment being produced or used so that workers are not exposed to chemicals during operations.
Isolation operation is another common isolation method. Simply put, it is to isolate the production equipment from the operation room. The simplest form is to place the pipeline valves and electronic switches of the production equipment in an operating room that is completely separated from the production location.
ventilation
Ventilation is the most effective measure to control harmful gases, vapors or dust in the workplace. With the help of effective ventilation, the concentration of harmful gases, vapors or dust in the air in the workplace is lower than the safe concentration, ensuring the health of workers and preventing the occurrence of fire and explosion accidents.
Ventilation is divided into two types: local exhaust and comprehensive ventilation. Local exhaust covers the pollution source and extracts the polluted air. It requires a small air volume, is economical and effective, and is easy to purify and recycle. Comprehensive ventilation is also called dilution ventilation. Its principle is to provide fresh air to the workplace, extract polluted air, and reduce the concentration of harmful gases, vapors or dust in the workplace. Comprehensive ventilation requires a large air volume and cannot be purified and recycled.
For point diffusion sources, local exhaust can be used. When using local exhaust, the pollution source should be within the control range of the ventilation hood. In order to ensure the high efficiency of the ventilation system, the rational design of the ventilation system is very important. Installed ventilation systems must be regularly maintained and maintained to ensure they function effectively.
For surface diffusion sources, use general ventilation. When using comprehensive ventilation, factors such as air flow direction must be considered during the factory design stage. Because the purpose of comprehensive ventilation is not to eliminate pollutants, but to disperse and dilute pollutants, comprehensive ventilation is only suitable for low-toxicity workplaces and is not suitable for corrosive workplaces with large amounts of pollutants.
Movable ventilation ducts and ducts such as fume hoods, welding rooms or spray paint booths in laboratories are all local exhaust equipment. In metallurgical plants, toxic fumes and gases are emitted as the molten material flows from one end to the other, requiring the use of both ventilation systems.

personal protection
When concentrations of hazardous chemicals in the workplace exceed legal limits, workers must use appropriate personal protective equipment. Personal protective equipment can neither reduce the concentration of harmful chemicals in the workplace nor eliminate harmful chemicals in the workplace, but is only a barrier to prevent harmful substances from entering the human body. The failure of protective equipment itself means the disappearance of the protective barrier. Therefore, personal protection cannot be regarded as the main means of controlling hazards, but can only be used as a supplementary measure.
Protective equipment mainly includes head protective equipment, respiratory protective equipment, eye protection equipment, body protective equipment, hand and foot protective equipment, etc.
keep clean
Hygiene includes two aspects: keeping the workplace clean and workers’ personal hygiene. Cleaning the workplace frequently, properly disposing of waste and spills, and keeping the workplace clean can also effectively prevent and control chemical hazards. Workers should develop good hygiene habits to prevent harmful substances from adhering to the skin and preventing harmful substances from penetrating into the body through the skin.