Activated carbon adsorption catalytic purification device

working principle

Activated carbon adsorption treatment of organic waste gas utilizes the characteristic of activated carbon micropores that can absorb organic substances. The organic solvents in high air volume and low concentration organic waste gas are adsorbed onto activated carbon and concentrated. After adsorption purification, the gas meets the standard and is directly discharged.

Catalytic combustion desorption is the process of using hot air generated from the decomposition of organic waste gas by catalytic combustion to heat the adsorbed organic solvents in activated carbon, bringing them to the boiling point of the solvent, causing the organic solvents to desorb from the activated carbon, and introducing the concentrated high concentration waste gas into the catalytic combustion device.

activated carbon adsorption—Catalytic combustion desorption is the organic combination of the advantages of both. Firstly, activated carbon is used for adsorption concentration. When the adsorption of activated carbon reaches saturation, the catalytic combustion equipment is started by electric heating, and the activated carbon adsorption bed is heated by hot air. When the catalytic combustion reaction bed is heated to250℃Left and right, the activated carbon adsorption bed reaches60~120℃At that time, the high concentration exhaust gas resolved from the adsorption bed can undergo oxidation reaction in the catalytic reaction bed. The high-temperature gas after the reaction undergoes heat exchange in the heat exchanger, and a portion of the heat exchanged gas is reused and sent to the activated carbon adsorption bed for desorption, while the other portion is discharged into the atmosphere. The temperature of the desorbed exhaust gas rapidly increases after heat exchange in the heat exchanger, reducing the heating power of catalytic combustion, thereby enabling the catalytic combustion device and desorption project to operate at low or no power.

Technical features

The core part of the system consists of three parallel activated carbon adsorption beds and a catalytic combustion furnacePLCThe control system is controlled and equipped with a touch digital display screen. The front-end of the equipment is connected to the washing tower and dry filter, and the back-end of the equipment is connected to the chimney to discharge purified gas.

During the operation of the system, due to the large air volume, two out of the three units of the activated carbon adsorption bed are used for adsorption, and one unit is used for desorption regeneration as a backup.

The catalytic combustion device consists of an inner liner and an outer shell, with the inner liner having a heat exchange chamber、Heating chamber and catalytic chamber. When the equipment is running, the exhaust gas is heated through a heating chamber, and with the help of a catalyst, the organic exhaust gas can undergo flameless combustion at a lower ignition temperature, achieving the purpose of purifying the exhaust gas.

Scope of application

This purification device is mainly suitable for purifying and eliminating odors from volatile or leaked organic waste gases in painting, printing, electromechanical, home appliances, shoe making, plastic and various chemical workshops. It is most practical for organic waste gases with low concentration and high air volume that are not suitable for direct combustion or direct catalytic combustion and adsorption recovery treatment.