Activated carbon is a kind of adsorbent made of carbon-containing materials with black appearance, developed internal pore structure, large specific surface area, strong adsorption capacity, non-polar surface, hydrophobic and organophilic. The porosity of activated carbon has a strong adsorption capacity for some harmful gases (mainly organic matter). It is often used to adsorb aliphatic CnHm, aromatic hydrocarbon, ketones, alcohols, ethers, aldehydes, organic acids, kerosene, gasoline, phosgene, esters, odor, etc. When the exhaust gas passes through the activated carbon layer, it is adsorbed on the activated carbon by the unbalanced molecular attraction or chemical bond existing on the carbon surface, so as to achieve the exhaust gas purification.
The filtered organic waste gas enters the high specific surface area activated carbon adsorption and concentration device, and the air flow passes through the activated carbon hole, where the organic solvent molecules are adsorbed in the activated carbon microhole under the action of adsorption force to realize the separation of solvent molecules and air, and the clean air after adsorption and purification is discharged into the atmosphere through the exhaust cylinder. After adsorption of activated carbon to a certain extent, its adsorption performance will be reduced, in this state is called adsorption saturation. The activated carbon needs to be regenerated after adsorption saturation to restore its adsorption function. This regeneration process is called desorption regeneration process.
※ PLC automatic control;
※ Adopt multiple safety facilities;
※ Stable operation, easy maintenance, low operating costs;
The gas flow simulation is carried out in the activated carbon box to ensure that the exhaust gas is distributed through the activated carbon layer to achieve the best adsorption effect.
1. The concentration of organic waste gas entering the purification device should be less than 25% of the lower limit of its explosion limit;
2. An emergency device for direct exhaust of organic waste gas should be set up before the purification device. When the purification device fails, it should be able to open the direct exhaust device immediately so that the organic waste gas can be directly drained to prevent the accumulation of organic gas.
3. The top of the activated carbon adsorber should be equipped with a pressure gauge and a safety release device (safety valve or bursting disc device);
4. Before the adsorption and purification device, a flame arrester should be set;
5. The activated carbon adsorption device should have good grounding measures to prevent the accumulation of static electricity;
6. The differential pressure meter should be set on the air pipe of the gas inlet and outlet of the activated carbon adsorber to determine the airflow resistance (pressure drop) through the adsorber, so as to determine whether the activated carbon needs to be replaced;
7. Activated carbon adsorption device and surrounding should be set up a certain no-fire area.
It is widely used in various fields of the national economy such as food, medicine, environmental protection, energy, chemical industry, and national defense, and plays an indispensable role.
