Environmental protection machine for removing chemical gaseous pollutants in laboratory air

Abstract

The invention provides an environmental protection machine for removing chemical gaseous pollutants in laboratory air. The environmental protection machine comprises: a box body, the top of which is provided with an upper air outlet and the bottom of which is provided with a bottom surface air inlet, a left air inlet and a right air inlet; an HEPA efficient filtering module mounted at the top of the box body and located below the upper air outlet; a first W-shaped chemical filtering module mounted below the HEPA efficient filtering module; an EC fan mounted below the first W-shaped chemical filtering module; a TVOC chemical filtering module mounted below the EC fan; a second W-shaped chemical filtering module mounted below the TVOC chemical filtering module; a negative ion sterilization module mounted below the second W-shaped chemical filtering module; and a pre-filter arranged below the negative ion sterilization module. Air in a laboratory can be circularly filtered, various pollution gases in the laboratory are removed through cooperation of all the filtering modules, and the purification efficiency is high.

Description

technical field [0001] The invention relates to the technical field of air purification equipment, in particular to an environmental protection machine for removing chemical gaseous pollutants in laboratory air. Background technique [0002] A variety of volatile chemical reagents and materials are stored and used in the laboratory, which continue to volatilize and leak into the laboratory air, forming chemical pollution gases. Laboratories are generally equipped with various chemical waste gas emission devices, such as laboratory fume hoods, atomic absorption hoods, universal absorption hoods, etc., to carry out special exhaustion for places where there are more chemical pollution gases, because most chemical gases are heavier than air , some are easy to form azeotropic compounds with water in the air (such as HCl.3H 2 O), these exhaust gas discharge devices can not completely exhaust the volatilized chemical pollution gases, and some leaks are everywhere in the low-altitu...

AI Technical Summary

Problems solved by technology

[0004] Although it has been able to solve the pollution of laboratory air particles very well, the acid-base chemical gaseous pollutants and hydrocarbon gaseous pollutants (VOCs) volatilized into the laboratory air at various molecular levels, such as hydrochloric acid, hydrogen Fluoric acid, sulfuric acid mist, hydrobromic acid, acetic acid, hydrogen sulfide, sulfur dioxide, nitrogen oxides, chlorine, ammonia, amines, toluene, benzene, aldehydes, isopropanol, acetone, ether, methyl sulfide, methyl sulfide The purification and removal effect of volatile chemical pollution gases such as alcohol and n-hexane is generally unsatisfactory

At present, most laboratories use activated carbon physical adsorption method to treat chemical waste gas. Physical adsorption only adsorbs and retains chemical pollutant gas molecules in the micropores of activated carbon. Water molecules adsorb and release the originally adsorbed pollutant gas molecules, forming secondary pollution

Activated carbon is also easy to agglomerate in a humid environment, which affects its purification and filtration effect and service life

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