Equipment and method for recovering volatile organic compounds

Abstract

The invention discloses equipment and a method for recovering volatile organic compounds, and relates to the technical field of volatile organic compound treatment. The equipment comprises an adsorption assembly, a cyclone separator, a desorber, an induced draft fan and a condenser. The adsorption assembly, the cyclone separator, the desorber, the induced draft fan and the condenser are communicated in sequence, the desorber is communicated with the adsorption assembly through an adsorbent feedback mechanism in the adsorption assembly, and the adsorption assembly comprises a first sealing box body, an L-shaped shunt pipe, an annular confluence pipe, an adsorbent blanking pipe, a hopper and a plurality of spherical activated carbon; a waste gas input pipe fixedly penetrates through the left side of the first sealing box body. Any spherical activated carbon can be in effective contact with methylbenzene evenly distributed in waste gas, then efficient adsorption of methylbenzene is achieved, a method for increasing the usage amount of the spherical activated carbon does not need to be adopted, and the recovery cost is effectively reduced while the adsorption efficiency is guaranteed.

Description

technical field [0001] The invention relates to the technical field of volatile organic compounds treatment, in particular to a device and method for recovering volatile organic compounds. Background technique [0002] Volatile organic compounds (VOCs) are relatively common and ubiquitous air pollutants in the atmosphere. Common components include hydrocarbons, benzene series, alcohols, ketones, phenols, esters, and amines. The sources are very extensive, not only industrial stationary sources such as petrochemicals, paint coatings, and leather production, but also mobile sources such as motor vehicle exhaust gases. Among them, the more common VOCs are toluene present in industrial exhaust gases. [0003] The invention patent of patent application publication number CN 110898614 A discloses a kind of equipment and method for recovering volatile organic compounds, wherein the equipment for recovering volatile organic compounds includes a circulating fluidized bed, a primary c...

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Problems solved by technology

[0004] However, in the actual use process, the researchers collected and tested the exhaust gas that needs to be discharged into the atmosphere, and found that the remaining amount of toluene in the exhaust gas accounted for about 12% of the total toluene in the exhaust gas. The actual purification efficiency is about 88%. In order to understand the specific reasons for the above situation, the researchers tested the saturation of the spherical activated carbon separated by the primary cyclone separator, and then learned that in this batch of spherical activated carbon, more than 32% of the spherical activated carbon Activated carbon saturation rate is less than 70%

[0005] From the above content, it can be seen that in the process of activated carbon adsorbing toluene, some activated carbons have not effectively contacted with toluene during the movement process, and thus cannot better adsorb toluene, which led to the occurrence of the above situation. Although the increase in the use of spherical activated carbon The amount can solve the above problems, but it needs to be modified for the equipment, and it will also increase the energy consumption during the subsequent desorption treatment, which will increase the recovery cost

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