1. Types of activated carbon: There are many kinds of activated carbon, which can be selected according to the properties of malodorous substances and the requirements after laboratory tests; Activated carbon absorbs the adsorption capacity of activated carbon selected for waste gas treatment equipment to deodorize. The structure diagram of the cooking fume purifier, especially in the low concentration area, has the advantages of good adsorption performance, fast adsorption speed, reduced adsorption layer, low resistance loss, good mechanical strength, reduced loss during regeneration, easy regeneration, high surface activity after regeneration, easy source and low price.

2. Adsorption bed forms: moving bed and flowing bed. In the waste gas treatment equipment with activated carbon adsorption, activated carbon can contact with gas for mass transfer in different ways. The adsorption bed of catering oil fume purifier can be divided into fixed bed, moving bed and flowing bed, which has good mass transfer effect. It is generally used to deal with the situation of large gas volume, high odor concentration and frequent replacement of activated carbon, but the equipment is complicated and the activated carbon is seriously lost in operation.

3. Pretreatment of malodorous gas: When the malodorous concentration is high or the malodorous gas is compound, or the malodorous gas contains dust aerosol impurities, the gas must be pretreated to ensure the deodorization effect. According to the specific situation of malodorous gas, pretreatment methods can be water washing, acid washing and alkali washing, and dry or wet dust collectors can be used for gases with high dust content.