The device is designed according to two basic principles of adsorption (high efficiency) and catalytic combustion (energy saving). It works continuously in two gas paths, one catalytic combustion chamber and two adsorption beds are used alternately. 

Firstly, organic waste gas is adsorbed by activated carbon. When it reaches saturation, it stops adsorbing. 

Then, the organic matter is desorbed from activated carbon by hot air flow to regenerate activated carbon. The desorbed organic matter has been concentrated (the concentration is tens of times higher than before) and sent to catalytic combustion chamber to catalytic combustion to form carbon dioxide and water vapor. 

When the concentration of organic waste gas is over 2000 ppm, the organic waste gas can maintain spontaneous combustion in the catalytic bed without external heating. The exhaust gas after combustion is discharged into the atmosphere, and most of it is sent to the adsorption bed for regeneration of activated carbon. 

In this way, the thermal energy required for combustion and adsorption can be satisfied, and the purpose of energy saving can be achieved. After regeneration, it can enter the next adsorption; during desorption, the purification operation can be carried out in another adsorption bed, which is suitable for both continuous operation and interval operation.