The following points should be considered when installing the gas alarm
1. First, find out which possible leak points of the plant equipment to be monitored, and estimate their leakage pressure, possible leakage amount per unit time, leakage direction, etc., and draw a checkered map, which is divided according to the estimated severity. A, B, C three levels.
2. According to the dominant direction of the site, the possible circulation phenomenon of the air and the natural flow of the workshop air, it is speculated that the natural diffusion trend pattern of the combustible gas on the plane when a large amount of leakage occurs.
3. According to the density of the leaking gas (greater or smaller than the air), combined with the rising trend of the air flow, the three-dimensional flow trend diagram of the leakage flow is integrated.
4. According to the formed three-dimensional flow concept of flammable gas leakage in the monitoring range, an initial set point scheme can be made at the downstream position of the flow.
5. Study the point leakage state of the leak point: it may be a micro leak or a jet leak. If it is a micro leak, set the position to be close to the leak point. If it is a jet leak, it is slightly away from the leak. Based on the above situation, the final set-up plan is drawn up.
6. For a large and medium-sized workshop with flammable gas leakage, it is recommended to set a detection point for each distance (10~20) m. In this way, the quantity and variety that need to be purchased can be estimated from the final chess plot drawn.
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