PP fume hood

1PP fume hoodstructure

Upper cabinet: The main frame is made of 8mm thick high-quality pure PP (polypropylene) board, which is welded with the same color and same quality welding rod. Excellent acid and alkali resistance, and good weather resistance.

Tabletop: Made of 8mm acid and alkali resistant PP material, lined with a 'T-shaped structure', with high strength, acid and alkali resistance, impact resistance, and easy cleaning.

Lower cabinet: Made of 8mm acid and alkali resistant PP material, with square tube structure and T-shaped structure at the four corners, it can achieve good load-bearing capacity.

IIPP fume hoodfunction

(1) Release function: It should have a mechanism to absorb harmful gases generated inside the fume hood into the gas outside the hood, dilute it, and eliminate it from the outside.

(2) Non backflow function: It should have the function of preventing harmful gases from flowing back into the room through the airflow generated by the exhaust fan inside the fume hood. To ensure the implementation of this function, it is a good method to connect a fume hood and a ventilation fan with a single pipeline. It is not possible to connect them with a single pipeline, and it is limited to those on the same floor and in the same room that can be connected in parallel. The ventilation fan should be installed at the end of the pipeline as much as possible.

(3) Isolation function: A non sliding glass window should be installed in front of the fume hood to separate the inside and outside of the fume hood.

(4) Supplementary function: It should have a channel or alternative device for inhaling air from outside the fume hood when discharging harmful gases.

(5) Control wind speed function: To prevent harmful gases from escaping from the fume hood, a certain suction speed is required. The factors that determine the suction speed of the fume hood include the heat generated by the experimental content and its relationship with the number of air changes. The main focus is on the experimental content and the properties of harmful substances. To ensure such wind speed, the exhaust fan should have the necessary static pressure, which is the frictional resistance when air passes through the ventilation duct. When determining the wind speed, attention must also be paid to noise issues. When air flows through the pipeline, it should be limited to 7-10m, and noise will be generated beyond 10m. The noise limit in the laboratory is usually 70dBA. Increasing the pipeline cutting area will reduce the wind speed and noise. Considering the cost and construction issues of the pipeline, the power of the pipeline and exhaust fan must be carefully selected.

(6) Heat resistance and acid alkali corrosion resistance function: Some fume hoods require the installation of electric furnaces, while others produce large amounts of toxic and harmful gases such as acid and alkali, which are corrosive. The countertop, lining plate, side plate, and selected water and air nozzles of the fume hood should have anti-corrosion function.