Selection principles and applications of harmful gas detectors
Harmful gas detection and alarm device is a specialized safety and health detector used to detect the content of flammable or toxic gases and vapors in the air inside chemical workplaces or equipment, and to alarm for exceeding the limit. When choosing a gas detector, the following three principles should also be noted:
Firstly, it is necessary to clarify the purpose of the detection and select the type of instrument. The detection of harmful gases generally has two purposes, the first is to detect explosions, and the second is to detect toxins. The so-called explosion testing is to detect the combustible gas content in hazardous areas, issue an alarm if it exceeds the standard, in order to avoid the occurrence of explosion accidents; Poison testing is the process of detecting the concentration of toxic gases in hazardous areas, triggering an alarm if they exceed the limit, in order to prevent staff from being poisoned.
Then, clarify the purpose of the detection and select the type of instrument. If it is a leak detection for long-term operation in production or storage positions, a fixed detection alarm should be selected; Portable instruments are used for other maintenance and inspection, emergency testing, entry testing, and patrol testing.
Finally, clarify the detection object and select the optimal instrument model. It should be noted that the detection principle of the instrument should adapt to the requirements of the detection environment.
The purpose of harmful gas detection alarm:
Harmful gas detection and alarm device is a specialized safety and health detector used to detect the content of flammable or toxic gases and vapors in the air inside chemical workplaces or equipment, and to alarm for exceeding the limit. In addition, the air oxygen deficiency detector also belongs to this type of instrument.
The detection of harmful gases in hazardous chemical sites mainly involves the following situations:
Leakage detection: Alarm for on-site leakage detection of harmful gases or liquids (vapors) in equipment pipelines, and leak detection during equipment pipeline operation.
◎ Maintenance and testing: After equipment maintenance and replacement, residual harmful gases or liquids (vapors) should be detected, especially before hot work.
Emergency testing: In case of abnormal situations or accidents at the production site, harmful gases or liquids (vapors) should be tested for safety and hygiene.
◎ Entry testing: When personnel enter the hazardous substance isolation operation room, enter the drainage ditch, cable trench or equipment in hazardous areas for operation, harmful gases or liquid vapors must be tested.
◎ Patrol inspection: During safety and hygiene inspections, harmful gases or liquid vapors should be detected.
We need to strengthen safety management of hazardous chemicals, improve safety measures, and control potential safety hazards. However, it is impossible to achieve absolute safety, and there may still be situations where everything is lost. Therefore, the detection and alarm of accident hazards, as well as the detection and alarm of harmful gases or liquids (vapors) in hazardous chemical sites, are very necessary. It is of great significance to avoid and control accidents.
