When combustible gas leaks in an industrial environment and the combustible gas alarm detects that the concentration of combustible gas reaches the alarm value set by the alarm, it will send out sound and light alarm signals to remind to take safety measures such as personnel evacuation, forced exhaust, shutdown of equipment, etc. It is the 1 indispensable instrument in industrial production. However, combustible gas alarm needs to be installed before it is put into use. how should the installation position and height of combustible gas alarm be selected? the following is an introduction to yiyuntian electronic editor:

according to the relevant provisions of the GB50493-2009" petrochemical combustible gas and toxic gas detection and alarm design specification ", the installation position of the detector is determined according to the density and wind direction of the detected gas, however, it should be avoided to install the detector in a place with excessive air flow.

In general, indoor space with moderate area can be evenly distributed according to the protection radius, I .e. the detector is installed within 7.5m from the release source or the horizontal distance between the two detectors is within 15m; if the area is too large or there are a large number of indoor spaces that can be ventilated, the detector should be arranged according to the outdoor situation.When the detector is installed outdoors, it should be arranged on the windward side of the annual small frequency wind direction of the combustible gas release source, and the distance from the release source should not be greater than 15m; when the detector is arranged on the downwind side of the annual small frequency wind direction of the combustible gas release source, the distance from the release source should not be greater than 5m.

when detecting gases heavier than air, the detector installation height should be 0.3~0.6m from the ground; When detecting gases lighter than air, the detector installation height should be 0.5~2m higher than the release source.

1, installation location

the relevant provisions of the Code for Design of Body and Toxic Gas Detection and Alarm (GBT50493-2019), the installation position of the detector is determined according to the density and wind direction of the detected gas, but the detector should be avoided in the place where the air flow is too large.

in general, the indoor space combustible gas detector is installed within 7.5m from the release source or within 15m from the horizontal distance between the two detectors. The toxic gas detection radius is 1m.For the indoor space with large area or a large number of ventilated parts, the detector shall be arranged according to the outdoor situation.

when the detector is installed outdoors, it should be arranged on the windward side of the annual minimum frequency wind direction of the combustible gas release source, and the distance from the release source should not be more than 15m; When the detector is arranged on the downwind side of the annual minimum frequency wind direction of the combustible gas release source, the distance from the release source should not be greater than 5m. The toxic gas should be less than 2m.

2. Installation height

Installation of combustible gas detector the height should be installed according to the specific gravity of the combustible gas. The specific installation position of the detector is determined by the specific gravity of the gas. The specific installation scheme is as follows:

1. When the density specific gravity of the detected gas is greater than the air specific gravity, the gas detector should be installed at (30~60)cm from the ground, and the sensor part is downward.

2. when the density specific gravity of the detected gas is less than that of the air, the gas detector should be installed at a distance of (30~60)cm from the ceiling, and the sensor part should be downward.

the installation position of the combustible and harmful gas alarm probe is determined according to the relevant provisions of the GB50493-2009 "design specification for combustible gas detection and alarm in petrochemical industry" according to the detection gas density and wind direction, and the installation position of the detector shall be avoided.

In general, the area is suitable for indoor space. According to the protection radius, the uniform distribution point is that the detector is installed within 7.5m from the release source or within 15m from the horizontal distance between the two detectors; the indoor space of the area or stock ventilation part shall be arranged according to the outdoor situation. The detector shall be installed outdoors. The distance between the full frequency wind direction wind side and the release source shall be 15m; the distance between the full frequency wind direction wind side and the release source shall be 5m.

the installation height of the detector for detecting heavier gas than air shall be 0.3~0.6m from the surface; The installation height of the detector for detecting lighter gas than air should be 0.5~2m higher than that of the release source: A gas density of 0.97kg/m3 (standard state) is considered heavier than air. A gas density of 0.97kg/m3 (standard state) is considered lighter than air.

The above contents on how to select the installation location and height of combustible gas alarm are shared here, in addition, during the installation and use of combustible gas alarm , it is necessary to strictly abide by the requirements of the instructions and avoid the "lightning spots" that affect its normal operation, so that the normal and accurate monitoring of combustible gas alarm will not cause problems.