A gas detector control system is a system used to detect the concentration of gases in the environment in real time and to sound an alarm when a harmful gas leak is detected. It is mainly composed of gas detectors and alarm controllers, and is widely used in specific industries such as petroleum, chemical, and coal chemical industries to ensure production safety and prevent fire and explosion accidents.
Gas alarm controller: Receives signals from gas detectors, and when harmful gases are detected, it will send out sound and light alarm signals, and can control the activation of related safety facilities, such as exhaust systems, shut-off valves, etc., to prevent explosions and poisoning accidents.
Gas detectors: These devices can sense the concentration of flammable or toxic gases in the environment, and when the gas concentration reaches the preset alarm threshold, they will output a signal to the alarm controller. Catalytic, electrochemical, and infrared types are more commonly used types of gas detectors.
Actual application cases and industry applications:
In industries such as petroleum, chemical, and coal chemical industries, gas detector control systems are widely used in production, processing, and transportation to detect the leakage of flammable and explosive gases in real time. Once a harmful gas leak is detected, the system will immediately sound an alarm and initiate relevant safety measures to ensure production safety and prevent fire and explosion accidents. In addition, the system is also used in many fields such as atmospheric environmental protection, electricity, and steel metallurgy to achieve comprehensive safety monitoring.
Gas detectors and controllers should be installed in the following locations:
1.Installation location of gas detectors:
Near the leak source: The detector should be installed at key locations with potential leaks such as valves, instruments, and T-type connections, usually within 1-2 meters horizontally from the potential leak source.
Ventilation airflow path: Installed under the vent, exhaust fan, or upstream of the workshop air circulation direction to ensure rapid capture of diffused gas.
Layered distribution: In large workshops or high-rise spaces, detectors should be installed in layers to cover different heights (such as the top and operating floors).
2.Installation according to gas specific gravity:
Density greater than air: Installed 30~60 cm from the ground with the sensor facing downward.
Density less than air: Installed 30~60 cm from the ceiling with the sensor facing downward.
Evenly distribute points within the effective coverage area: According to the effective coverage radius of the detector (such as 7.5 meters indoors), evenly distribute points within the effective coverage area.
3.Controller installation location:
Control room: The alarm host should be installed in a control room or duty room with 24-hour manned duty, and linked with the exhaust system and emergency shut-off valve.
Alarm installation: The on-site area alarm should be installed near the alarm area where the detector is located. The installation height should be 2.2 meters higher than the ground or floor of the on-site area, and located in a place that is easily noticed by the staff.
4.Installation requirements and environmental conditions:
Avoid interference: Avoid installation in places directly affected by steam and oil smoke, places with large air flow such as air inlets, ventilation fans, doors, places with a lot of water vapor and water droplets, places with strong electromagnetic fields, and extreme temperature environments (such as temperatures below -40℃ or above 55℃).
Fix and wiring: Ensure that the installation is firm and reliable, the sensor is placed downward, and the outer cover is covered after correct wiring to meet explosion-proof requirements.