Recycling system of VOCs in exhaust gas

Abstract

The invention relates to a recycling system of VOCs in exhaust gas. The recycling system comprises a micropore absorption tower, an absorption liquid circulation system, an absorption liquid cooling system, a rich and barren absorption liquid circulation system, a condensing system, a buffer tank and a vacuum pump which are connected in sequence through a pipeline; the tail gas discharge outlet of the vacuum pump is connected with the micropore absorption tower, so that a closed loop circulation system is formed, and zero emission of VOCs is further realized. According to the recycling system of VOCs in exhaust gas, the operation manner of closed loop circulation is adopted and the absorption and desorption processes are carried out synchronously, so that the working efficiency is improved, and high safety and reliability are further achieved.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and specifically discloses a VOCs recovery and utilization system in waste gas. Background technique [0002] Volatile organic compounds (VOCs) are typical representatives of air pollutants. VOCs generally contain "triphenyls" (benzene, toluene, xylene), aldehydes, halogenated hydrocarbons, polycyclic aromatic hydrocarbons, organic sulfides, organic nitrogen compounds, etc. Volatile Organic Pollutants. With the frequent occurrence of smog weather, the emission of VOCs, which is one of the important contributors to smog, has also attracted great attention. VOCs are also very easy to combine with moisture and dust particles in the air, and enter the human body with the respiratory system to endanger human health, cause endocrine dysfunction, and affect the human immune function, respiratory tract, cardiovascular and central nervous systems, etc., and this Substances often have bi...

AI Technical Summary

Problems solved by technology

[0007] 1. The solvent is volatile and lost, resulting in high operating costs;

[0008] 2. There is a problem of liquid in the absorption equipment, which causes the solvent to escape with the flowing gas;

[0009] 3. Due to the difficulty of desorption, the absorption solvent is difficult to be recycled, and it is usually used for one time;

[0010] 4. In order to achieve higher absorption efficiency, multi-stage absorption towers are generally used, which brings about an increase in equipment investment costs;

[0011] 5. It has been well promoted in the field of oil and gas recycling, but it has not been widely used in other fields

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