Several problems that should be paid attention to in daily use of laboratory fume hood

As an important ventilation equipment, fume hood plays an irreplaceable role in the laboratory. Create a good experimental environment through the exhaust and gas supply system to protect technicians from toxic and harmful gases. For fume hood, an important ventilation equipment, laboratory staff must use and maintain it correctly to prevent damage.

1. Minimize air interference: air interference in the laboratory will reduce the ventilation and exhaust efficiency of the fume hood. Therefore, the fume hood should be placed in a correct and reasonable position to maximize efficiency. Bian Xiao suggested that it should be placed in a place where cross airflow can be avoided, and it should be placed reasonably according to the laboratory space.

2. Ensure normal ventilation: Before the fume hood officially starts working, the staff should check whether the ventilation function of the fume hood is normal, and then start running the fume hood after ensuring that it is correct. When working for the first time, they should check whether the wind speed and speed of the fume hood meet the prescribed standards. In the routine regulations of the laboratory, the wind speed when non-toxic pollutants are produced in general experiments is

0.25-0.38 m/s, the wind speed is 0.4-0.5 m/s when toxic and harmful pollutants are generated in the experiment, and 0.5-0.6 m/s when toxic or little radioactivity is generated in the experiment.

When gas is generated in the experiment, the wind speed is 0.5m/s and the particles are1m/s. ..

3. Correct operation: There are many types of fume hoods or specially customized fume hoods, and different products have different functions. To maximize the efficiency of the fume hood, it is the key to follow the correct operating procedures. Each type of fume hood has a set of related instructions and use steps, so the staff should read the instructions carefully and operate correctly before use.

4. Maintenance: As a kind of precision experimental equipment, the fume hood should be checked and proofread by professionals. If parts are found to be damaged and aged, they should be replaced in time. If there is any fault, report it in time and contact the manufacturer for maintenance.