Activated carbon adsorption and desorption equipment

　　Principles of adsorption and purification of organic waste gas
 

　　The organic waste gas is led by the air pipe and then enters the dry filter to remove the particulates and dust, and then enters the activated carbon adsorption bed. The number of adsorption beds is determined according to the size of the air volume. The valve can be switched to allow the gas to enter different adsorption beds. Working alternately, after the gas enters the adsorption bed, the organic substances in the gas are adsorbed by the activated carbon and attached to the surface of the activated carbon, so that the gas can be purified, and the purified gas is discharged to the atmosphere through the fan.
 

　　Principle of activated carbon regeneration device
 

　　By controlling the flow rate of the desorption process, the concentration of organic waste gas can be concentrated by 10-20 times. The desorption airflow is heated to about 300℃ by the electric heating device in the catalytic bed, and it is ignited under the action of the catalyst. The purification efficiency of the catalytic combustion process can reach 97 % Or more, after combustion, CO2 and H2O are generated and a large amount of heat is released. Part of this heat is used to heat the desorbed high-concentration exhaust gas through the heat exchanger in the catalytic combustion bed, and the other part is heated to remove the activated carbon from the outdoor air. For the use of attached gas, the electric heater must be started for about 1 hour to achieve the desorption catalytic combustion self-equilibrium process. After reaching the thermal balance, the electric heating device can be turned off. This kind of regeneration treatment system relies on the organic solvent in the exhaust gas as fuel, so that the regeneration process achieves a self-balanced cycle on the basis of no additional energy, which greatly reduces energy consumption and no secondary pollution. , The entire adsorption and catalytic combustion process is automatically controlled by PLC.