1. Type of activated carbon: there are many kinds of activated carbon, and the appropriate one can be selected according to the requirements after laboratory tests according to the properties of malodorous substances; Activated carbon adsorbs the adsorption capacity of activated carbon selected for waste gas treatment equipment to deodorize. The structure diagram of catering oil fume purifier, especially in low concentration area, has good adsorption performance and high adsorption speed to reduce the degree of adsorption layer, low resistance loss, good mechanical strength, reduced loss in regeneration process, easy regeneration, and high surface activity after regeneration, easy source and low price.

2. adsorption bed forms: moving bed and flowing bed. In the treatment equipment of activated carbon adsorption waste gas, activated carbon can contact and transfer mass with gas in different ways. The adsorption bed of catering oil fume purifier can be divided into fixed bed, moving bed and flowing bed, which have good mass transfer effect, and are 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 loss is serious 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 and aerosol impurities, in order to ensure the deodorization effect, the gas must be pretreated. Pretreatment methods can be water washing, acid washing and alkali washing according to the specific conditions of malodorous gases, and dry or wet dust collectors can be used for gases with high dust content.