VOCs waste gas treatment equipment

Abstract

The invention discloses VOCs waste gas treatment equipment, and relates to the technical field of VOCs waste gas treatment. A negative pressure fan communicated with a waste gas inlet channel is arranged at one end of a waste gas absorption transverse pipe; a negative pressure inner cavity adjacent to the negative pressure fan is arranged in the waste gas absorption transverse pipe; an activated carbon mesh enclosure is filled with internal activated carbon; a peripheral ventilation electromagnetic valve located at the position of a second main port of the waste gas absorption transverse pipe is arranged in a waste gas outlet channel. A heating rod used for heating internal activated carbon is arranged in the activated carbon mesh enclosure, and a temperature sensing module used for sensing and monitoring the temperature of a heating rod is arranged on one side of the activated carbon mesh enclosure. The VOCs waste gas is prevented from being absorbed by internal activated carbon in the front-end area in a supersaturated mode, the relative adsorption degree of activated carbon particles in the middle-rear section is low, when the activity of the activated carbon in the waste gas absorption transverse pipe is recovered, the activity can be efficiently recovered in a balanced mode due to balanced absorption, and the activity recovery time of the internal activated carbon is shortened.

Description

technical field [0001] The invention belongs to the technical field of VOCs waste gas treatment, and in particular relates to a VOCs waste gas treatment equipment. Background technique [0002] According to the definition of the World Health Organization (WHO), VOCs (volatile organic compounds) are various organic compounds with a boiling point of 50°C to 260°C at room temperature. In my country, VOCs refer to organic compounds with a saturated vapor pressure greater than 70Pa at room temperature and a boiling point below 260°C at normal pressure, or all organic compounds with a vapor pressure greater than or equal to 10Pa at 20°C and are volatile. [0003] Most VOCs have unpleasant special smell, and are toxic, irritating, teratogenic and carcinogenic, especially benzene, toluene and formaldehyde will cause great harm to human health. VOCs are important precursors that cause urban haze and photochemical smog, mainly from coal chemical industry, petrochemical industry, fuel...

AI Technical Summary

Problems solved by technology

[0004] It can be seen from the above that in various industrial production links, it is very necessary to treat VOCs exhaust gas. It is a relatively common method to use activated carbon for VOCs exhaust gas absorption, but the activated carbon arranged in the ventilation pipe is used for VOCs exhaust gas absorption. At the same time, the activated carbon in the front end first contacts the VOCs exhaust gas, and the activated carbon in the middle and rear stages contacts the subsequent VOCs exhaust gas that is not absorbed by the front-end activated carbon, resulting in a greater degree of VOCs exhaust gas absorbed by the activated carbon in the front stage than in the middle and rear stages.

[0005] However, after the activated carbon has been absorbed for a certain period of time, if it is heated to restore its activity, the activated carbon in the previous stage will be too saturated due to the degree of adsorption, and it will take a long time for the activity to recover.

If activated carbon activity recovery is carried out in a non-replaceable structure in the device, it will affect the efficiency of VOCs exhaust gas treatment

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