Activated Carbon Adsorption Technology Overview Processing Principle Process Flow
The activated carbon adsorption technology can be used to process organic exhaust gases with a concentration between 0~1000 mg/m3 and blowing rate between 100~100,000 m3/h, exhaust gas working conditions with a high blowing rate and a low concentration or intermittent operation and situations with low or super-low concentrations such as essences or spices. It is widely used in various industries such as petrochemistry, leather, textile, printing and dyeing, paint, rubber, shoemaking, pharmacy, electronics, chemical fiber and brewing.
Adsorption Process: the adsorption capacity of a solid surface is used. The exhaust gas contacts a porous solid substance with a big superficial area. Pollutants in the exhaust gas are absorbed at the solid surface to be separated from the gas mixture, thus realizing purification.
Desorption and Regeneration Process: after absorbing a certain amount of solvent, the activated carbon can be desorbed and regenerated. During regeneration, the steam is spayed from the bottom of the tower to steam out the solvent absorbed by the activated carbon; then it is condensed to liquid in the condenser, and enters the separator; organic solvents are separated and recycled; the residual enters the aerating pump, and is discharged after aeration.
After the exhaust gas is collected, dust is removed in the air filter and dehumidified in the dehumidifier; then it enters the adsorbent bed, and high-quality granular activated carbon or activated carbon fiber is used as the adsorbent to absorb pollutants on its surface through molecular attraction and capillary action, during which time oxygen and nitrogen are not absorbed. After being saturated from adsorption, desoprtion can be conducted through hot steam (lathe I and lathe II can be used alternatively); after concentration and desoprtion, the exhaust gas can be processed through condensate recycling, incineration, biodegradation and plasma processing. After desoprtion, the activated carbon/activated carbon fiber is desorbed through hot steam or vacuum for reuse.
