Installation requirements for combustible gas detectors

Update:26-01-2019
Summary:

When the flammable gas alarm fixed-point device is in p […]

When the flammable gas alarm fixed-point device is in place, its orientation is not easy to change. The following points should be considered when applying in detail. Clarify what the equipment to be monitored may be missing, analyze their leakage pressure, direction and other factors, and draw the probe azimuth distribution map, according to the severity of the leakage, the classification of I, II, III three levels.

According to the detailed factors such as the direction of the airflow and the direction of the wind, the direction of leakage of the combustible gas is judged when there are many leaks. According to the density of the leaking gas (greater or smaller than the air), combined with the trend of air activity, the comprehensive trend graph of the three-dimensional activity of the leak is formed, and the initial set plan is made in the downstream direction of the activity.

The leakage of the leak point is that the micro-leakage is still erupting. If it is a micro leak, set the position of the point to be close to the leak point. If it is a spray-like leak, it should be slightly away from the leak. Summarize these situations and draw up a final plan. In this way, the quantity and type of demand can be budgeted. For places where there is a large flammable gas leak, a test point should be set for each distance of 10-20m according to the relevant regulations. Regarding the small and non-continuous operation of the unmanned pump room, it is necessary to pay attention to the possibility of leakage of combustible gas. Generally, a detector should be installed in the downhole device.

For locations where hydrogen is leaking, the detector equipment should be placed above the point of leakage. For media with a gas density greater than air, the detector device should be placed below the point of the leak point and be aware of the surrounding environment. Special attention should be paid to the setting of safety monitoring points for places where simple accumulation of flammable gases is required. Regarding the open flammable gas dispersion and escape environment, if there is a lack of outstanding ventilation conditions, it is also very simple to make the flammable gas content in a certain part of the air close to or reach the lower limit of the blasting concentration. These are safety monitoring points that cannot be ignored.

According to the analysis results of the scene, more than half of them were formed by incorrect equipment and verification. Therefore, it is necessary to introduce the correct equipment and check the attention to reduce the problem.