Talking about Application Notes of Combustible Gas Alarms

Combustible gas alarms are used to detect some combustible gases or toxic gases in the air, which can effectively detect gas leak detection alarms. When the flammable or toxic gas leaks in the industrial environment, it can effectively inspect some gases. This can effectively ensure that when the concentration of toxic gas in the air reaches the critical point where the explosive or poisoning alarm is set, an alarm will be issued. Can be effective for inspections. If you do not pay attention to five of them, the combustible gas alarm will be blocked resulting in an error or no detection.

Application considerations

Once the flammable gas alarm is installed in place, its location is not easily changed. According to the work experience accumulated over the years, the following points should be taken into consideration when it is applied.

(1) Find out which possible leakage points of the devices to be monitored, analyze their leakage pressure, direction and other factors, and draw the distribution map of the probes, and classify them into three grades I, II and III according to the severity of the leakage.

(2) According to specific factors such as airflow direction and wind direction at the site, determine the direction of leakage of flammable gas when a large amount of leakage occurs.

(3) According to the density of leaked gas (greater than or smaller than air), combined with the trend of air flow, integrate the three-dimensional flow chart of leakage and make an initial set point scheme at the downstream position of the flow.

(4) The leakage status of the leaking point was studied as microleakage or jetting. If it is a microleakage, then set the position of the point near the leak. If it is a spray-like leak, keep it slightly away from the leak. Combine these conditions and draw up a final plan. In this way, the number and type of purchases needed can be estimated.

(5) For locations where there is a large leakage of flammable gas, a test point should be set at a distance of 10-20 m per relevant regulations. For unattended, small, non-continuous pumping stations, attention should be given to the possibility of flammable gas leaking. A detector should normally be installed at the downtake.

(6) For locations with hydrogen leaks, the detector should be installed on the plane above the leak.

(7) For media with a gas density greater than air, the detector should be installed on the lower surface below the leak point and pay attention to the surrounding environment. For sites where flammable gases can easily accumulate, special attention should be paid to the setting of safety monitoring points.

(8) For an open flammable gas diffusion escape environment, if there is no good ventilation, it is easy to make the flammable gas content in a certain part of the air close to or reach the lower explosion concentration, which are non-negligible safety monitoring points. .