Problems that may arise during the use of combustible gas detectors
Combustible gas detectors are mainly used in the petrochemical industry where combustible gases exist, such as gas, petroleum, and chemical industries. They can be used to detect whether there are dangerous leaks in indoor and outdoor places, and are also important instruments to ensure personal safety and production safety. If combustible gas is detected in a specific location, the detector will convert the gas signal into voltage and current signals to transmit to the alarm instrument. Finally, the instrument will automatically display the concentration value of the lower explosive limit of combustible gas. When personnel hear the sound and light alarm signal, they will take some safety measures to prevent the occurrence of explosion accidents. There are still many problems when choosing various gas detectors, which are mainly reflected in: 1. The detection of flammable gases is more important than the detection of toxic gases; 2. The detection of gases that may cause acute poisoning is more important than the detection of gases that may cause chronic poisoning.
Due to the lessons learned from numerous explosion accidents caused by combustible gas leaks, people attach great importance to combustible gas detection. It can be said that in any petrochemical or chemical plant, the vast majority of hazardous gas detectors are LEL detectors. However, equipping only with LEL detectors is still far from enough to truly protect the safety and health of workers. It cannot be denied that most volatile hazardous gases are combustible gases, but catalytic combustion combustible gas detectors (LELs) are not the preferred choice for detecting all combustible gases. It is specifically designed for detecting methane, but its detection performance for other substances is relatively poor. So, the lower limit concentration of combustible gases other than methane that they can detect is much higher than their allowable concentration.
When using a combustible gas detector correctly, we need to carefully consider the specific application situation.
Firstly, based on the specific conditions such as the airflow direction and wind direction of the location, determine the detailed leakage mode of combustible gas in the event of a leak.
Secondly, carefully study the specific form of the leakage state of the leakage point, and then make different budgets and treatment methods based on different situations.
Thirdly, based on the density of the leaked gas, discover the flow trend of the air and develop a three-dimensional flow trend chart of the leak to make a reliable plan.
Fourthly, under unfavorable ventilation conditions, if it is in an open environment where combustible gases diffuse, there is a high possibility of the combustible gas content approaching or reaching an explosive state, and these are important safety monitoring points.
Fifth, identify the possible leakage points of the detection device and predict the severity of the leakage based on the direction and pressure of the combustible gas leakage.
