Which gas detector is generally used in tunnel construction?
Tunnel construction is a relatively important project in engineering. During the construction of tunnels, a lot of flammable gases and some volatile organic compounds will be produced. The main component of flammable gas is methane (commonly known as gas), and the main hazard is explosion accidents caused by gas combustion. The composition of volatile organic compounds is relatively complex, and it is mainly harmful to the human body.
Now that we know the gases produced in tunnels, it makes sense to choose the right gas detector.
Toxic and harmful gases in tunnels can be harmful to the human body. According to different mechanisms of action on the human body, they are mainly divided into three categories: irritating gases, asphyxiating gases, and acute poisoning organic gases.
1. Irritant gases: including chlorine, sulfur dioxide, ammonia, formaldehyde, ozone, nitrogen oxides, etc. It has a strong stimulating effect on the skin and mucous membrane of the human body, and some of them also have a strong corrosive effect at the same time.
2. Asphyxiating gases: including carbon monoxide, hydrogen sulfide, carbon dioxide, nitrogen, ethane, methane, hydrogen cyanide, ethylene, etc. As the name implies, this type of gas will cause hypoxia in tissue cells, and the methane mentioned above is also an asphyxiating gas.
3. Acute poisoning organic gases (VOC): such as dichloromethane, n-hexane, etc. In tunnel operations, it is necessary not only to detect the explosion limit value of organic compounds, but also to do a good job in toxic gas detection and protection. Because these gases often have not reached the lower explosion limit, their toxicity has already caused considerable harm to the human body. Therefore, for the detection of this type of organic compound (VOC), it is necessary to first detect the toxicity and then the explosion limit.
