Correct use of gas detector

Combustible gas alarms consist of detectors and alarms. They are widely used in petrochemical industries such as petroleum, gas, chemical, and oil depots where flammable gases are present. They are used to detect leaks in hazardous locations indoors and outdoors and are important for production and personal safety. instrument.

Combustible gas alarms consist of detectors and alarms. They are widely used in petrochemical industries such as petroleum, gas, chemical, and oil depots where flammable gases are present. They are used to detect leaks in hazardous locations indoors and outdoors and are important for production and personal safety. instrument. When there is a flammable gas in the measured location, the detector converts the gas signal into a voltage signal or a current signal and transmits it to the alarm instrument. The instrument displays the percentage concentration of the lower explosion limit of the flammable gas. When the concentration of flammable gas exceeds the alarm set value, an audible and visual alarm signal is generated. The on-duty personnel take safety measures in time to avoid the occurrence of explosive explosion. 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 using the gas detector correctly.

(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 less than air), combined with the trend of air flow, integrated into a three-dimensional flow chart of leakage, and make an initial set point program at the downstream position of its flow.

(4) The leakage status of the leakage point was studied as microleakage or jetting. If it is a microleakage, set the position of the point to be 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 sites 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 paid 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. Sites that are liable to accumulate flammable gas should pay special attention 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. .

Correctly making the gas alarm not only allows you to complete the job, but also guarantees your life!