The function of the activated carbon adsorption device is to purify the waste gas and to adsorb the organic matter in the waste gas. It can be applied to petrochemical industry, pharmaceutical and chemical industry, pesticide and chemical industry, coating industry, painting industry, packaging and printing industry, leather industry, microfiber (artificial leather), ultra-high molecular weight polyethylene fiber (PE fiber) and other industries.
The activated carbon adsorption device can adsorb and reuse the solvent with relatively low boiling point, including benzene, toluene, xylene, chlorobenzene, 150 solvent oil, methanol, ethanol, acetone, butanone, formic acid, acetic acid, methacrylic acetate, gasoline and other solvents. The active carbon is determined by the solvent, for example toluene active carbon is for recycling toluene, gasoline activated carbon is for recycling gasoline.
Advantages of activated carbon adsorption device:
- The adsorption efficiency is up to 90%, it has the large capacity and wide application.
- Activated carbon has the characteristics of low price, wide range of sources, and so on.
- The operation is simple, safe and reliable.
- It is convenient to maintain, without too much manpower.
- Large specific surface area, good selective adsorption, it can deal with a variety of mixed waste gas at the same time.
Working principle of activated carbon adsorption device:
Pretreatment process is taken before VOC organic waste gas getting into the adsorber, including filter bag filtering, washing, moisture adjustment and other methods, to remove dust, high boiling point, or easily polymerized harmful substances, prolong the service life of activated carbon. In the activated carbon layer after treatment of VOC, in which the solvent is adsorbed, the air is discharged through exhaust pipe.
Steam is used as a heat source to desorb the solvent, forming a mixture of steam and solvent, leaving the desorber, getting a mixture of solvent and water by condensing cooling. If the solvent is insoluble in water, the chromatography layer method is used to reuse the solvent, such as benzene, toluene, etc. If the solvent dissolves in water, methods of distillation, extraction, or distillation are used to extract solvent, such as methanol, acetone, etc.
The activated carbon adsorption device is automatic control system, and it can be unattended during operation, the manual process can also be used according to the requirements of the user. VOC organic waste gas pipeline and the valve actuator adopts pneumatic type, meeting the requirements of explosion-proof in solvent reutilization process.
The system uses PLC programmable controller, three control methods of automatic, soft hand and hard manual are set up. In the safe operation of equipment, we set up the function of over temperature alarm, adsorption bed ultra micro alarm, fan fault or undervoltage alarm, valve failure alarm lamp. In addition, when the desorption is stopped, the running time of the fan can be delayed (the delay time can be set), ensure the safe and reliable operation of the equipment.