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VOCs exhaust definition

VOCs have a wide range of sources and various emission forms. According to its emission source, it can be easily divided into 5 categories. They are divided into five categories: painting waste gas, plastic and plastic waste gas, stereotyped waste gas, chemical organic waste gas and printing waste gas. Various types of exhaust gas have the characteristics of different types of components. In order to achieve a good treatment effect, and stably meet the exhaust emission standards. Different exhaust gas needs to be treated and possibly recycled through different treatment methods according to their physical and chemical characteristics.                                                                                                

List of common VOCs exhaust types

Serial number

Type of exhaust

Common ingredients


Painting exhaust

Acetone, butanol, xylene, toluene, ethyl acetate, butyl acetate


Plastic, plastic waste gas

Olefin plastic polymer monomers such as ethylene, propylene, styrene, acrylonitrile, butadiene, etc.


Finalized waste gas       dyeing and finishing enterprises, chemical fiber production enterprises

Aldehydes, ketones, hydrocarbons, fatty acids, alcohols, esters, lactones, heterocyclic compounds, aromatic compounds


Chemical organic waste gas

Chemical products produced with the same composition


Printing exhaust

Toluene, non-methane total hydrocarbons, ethyl acetate, ethanol


From the perspective of exhaust gas treatment methods, it can be divided into two types: removal methods and recovery methods. From the core analysis of the method and process, the removal process is mainly based on the direct reaction and decomposition of component materials. The recycling process is mainly based on the separation of material components and auxiliary recycling processes. In terms of application, the recovery process can effectively target high value-added and recovery value processes. It can recover and reuse some components in the exhaust gas. Considering the results, it not only reduces the emission concentration and volume of the exhaust gas, but also to a certain extent. This reduces the operating cost of the enterprise.

VOCs product framework

Different exhaust gas treatment processes have been proposed and developed separately for the use goals of exhaust gas recovery and treatment devices, but different technologies have different use effects for different concentrations of exhaust gas. Combining the characteristics of this application, Rankun Technology has divided the VOCs tail gas treatment process into corresponding products according to the treatment scope, concentration and process. Make it play its application efficiency in a reasonable application range.

Ran Kun Technology VOCs exhaust gas recovery and treatment system product schematic

Rankun Technology's VOCs product sequence uses single equipment as the product infrastructure, and combines the new exhaust gas concentration treatment range division method to provide corresponding product treatment systems and integrated products for different concentration ranges of exhaust gas conditions.


Rankun Technology VOCs single equipment list

Serial number


Single equipment, specifications

Process type


Gas delivery

Roots supercharger

Conveying device

Screw compressors

Liquid ring booster

Blower/Vortex Machine/Vortex Fan


Spray tower

PP, stainless steel



Adsorption box/tower

Adsorbent: activated carbon, molecular sieve, zeolite, high polymer resin Box body: stainless steel, PP



Falling film absorber

Graphite (tube, round block), stainless steel, silicon carbide


Rankun Technology VOCs tail gas recovery monomer products use various towers and boxes as the main and basic products. At the same time, combined with years of vacuum equipment production experience and research and development capabilities, various gas delivery devices have been introduced, which can be widely used in various exhaust gas delivery tasks and needs. 
For integrated products, Rankun Technology has developed targeted products suitable for different exhaust gases through analysis and process design of different concentrations of waste gas.