Selection of Fume Hoods with Gas Purification Function

  During laboratory construction, selecting a fume hood of the clean-air type requires choosing the type, material, shape, etc., based on the experimental content. The following factors are typically considered:
Medications used: When conducting experiments with organic substances or other special reagents, the control of air velocity must be fully considered. Heat sources: When using equipment with heat sources, if the heat output exceeds 2,000 kcal/hour, the ventilation capacity required to dissipate the heat must be calculated to determine the fan's power.
When handling radioactive materials or perchloric acid in experiments, a clean-air fume hood must be selected, with the air intake velocity set to exceed 0.5 m/s.
When conducting experiments with large equipment, consider the effective internal dimensions and allocate necessary space for exhaust ventilation.
Material: When using special acid-based experiments, consider the material of the fume hood. For example, industries such as semiconductors and corrosive sectors must employ corrosion-resistant materials for manufacturing.
External dimensions: Select the dimensions based on the experimental content, as excessively large sizes lead to waste, while overly small ones affect usability.
Environmental Protection: The discharged harmful gases must comply with national environmental standards. If the emissions exceed the national health standards, corresponding purification devices should be installed.
Energy conservation: Whenever possible, prioritize energy-saving measures. In rooms with heating or air conditioning, opt for recirculating fume hoods or choose fume hoods with airflow control. When selecting ventilation fans, determine their power based on actual needs. Avoid blindly increasing exhaust air volume and pressure. Instead, use frequency converters or variable-speed fans to reduce power consumption.
In modern research and experimentation, advanced scientific instruments and a well-equipped experimental environment are essential for enhancing technological capabilities and promoting scientific achievements. The primary mission of laboratory construction is to prioritize human safety, ensure security, and improve efficiency. Fume hoods play a crucial role in biochemical experiments, making it imperative to carefully select models that meet all technical specifications. Installing fume hoods solely to reduce costs at the expense of safety can lead to catastrophic consequences. The functionality and safety of fume hoods should therefore receive adequate attention.