A fume hood, also called a fume hood or a fume hood, is a large-scale facility for laboratories, especially chemical laboratories. The purpose is to reduce the experimenter's exposure to harmful gases. Completely isolated requires the use of a glove box. The fume hood is a first-class barrier to protect personnel against toxic chemical fumes. It can be used as an important safety back-up device, such as the failure of chemical experiments, the effective emission of harmful gases when chemical fumes, dust and toxic gases are produced, the fume hood, the protection of workers and the laboratory environment.
Disposal of fume hoods:
Absorption method: generally adopts physical absorption, that is, the exhaust gas is introduced into the absorption liquid to be purified, and is heated, analyzed, condensed and recovered after saturation of the absorption liquid; this method is applicable to exhaust gas with atmospheric quantity, low temperature, and low concentration, but it needs to be equipped with heating analytical recovery. Devices, large equipment, high investment.
Activated carbon adsorption method is generally adopted: Adsorption of waste gas by activated carbon, when the adsorption is saturated, activated carbon desorption regeneration, the exhaust gas blown off after catalytic combustion, into harmless substances, renewable activated carbon continue to use. When the activated carbon is regenerated to a certain number of times, the adsorption capacity is significantly decreased, and it is necessary to regenerate or renew the activated carbon.