The universal exhaust hood arm is primarily designed to swiftly dispel small-scale particles or gases, such as dust, hot air, volatile gases, and harmful substances, generated during experiments or production processes.
A universal exhaust hood arm is a type of local exhaust ventilation system. Local exhaust ventilation involves promptly removing harmful substances in close proximity to their source of generation. This method efficiently eliminates a large amount of hazardous substances with minimal air volume, making it a cost-effective and viable solution for enhancing existing laboratory conditions and the most suitable approach for new laboratory ventilation construction.
When arranging a universal exhaust hood arm, the following points should be noted:
1.Employ different exhaust hoods based on the dispersion characteristics of the hazardous substances. For instance, a hood with enclosures is usually used for spectrometers, while side suction hoods are suitable for laboratory bench exhaust or slot exhaust systems. Umbrella-shaped hoods are recommended for heating troughs.
2.Whole-room ventilation: It is essential to have both natural ventilation and mechanical ventilation. This is commonly used in rooms without fume hoods but require the expulsion of hazardous substances. Natural ventilation utilizes the temperature difference between indoor and outdoor environments to create a thermal pressure that expels harmful gases from the room. When air flows freely through the room via windows, it is termed unorganized natural ventilation. Organized natural ventilation involves directing air flow in a specific direction using designated intake and exhaust vents. Mechanical ventilation is employed when natural ventilation is insufficient to meet indoor air exchange requirements, 3.particularly in areas like hazardous material storage rooms and pharmaceutical storage facilities. Despite having natural ventilation, mechanical ventilation is necessary to address emergency ventilation needs.
4.Position the exhaust hood as close as possible to the source of hazardous substance emission.
Ensure that the exhaust hood facilitates experimental operations and equipment maintenance and inspections.
