Activated carbon adsorption catalytic combustion is designed based on two basic principles: adsorption and catalytic combustion (energy-saving). It adopts dual gas path continuous operation, with one catalytic combustion chamber and two adsorption beds alternately used. First, use activated carbon to adsorb the exhaust gas, stop adsorption when it is almost saturated, and then use a hot gas flow to desorb the substance from the activated carbon to make the activated carbon; The detached material has been concentrated (with a concentration several tens of times higher than before) and sent to the catalytic combustion chamber for catalytic combustion into carbon dioxide and water vapor, which are then discharged. When the concentration of exhaust gas reaches 700mg/m3 or above, the exhaust gas can maintain spontaneous combustion in the catalytic bed without external heating. Part of the exhaust gas after combustion is discharged into the atmosphere, while the majority is sent to the adsorption bed for use as activated carbon. This can meet the heat energy requirements for combustion and adsorption, achieving the goal of energy conservation. Can enter the next adsorption; During desorption, purification can be carried out using another adsorption bed, which is suitable for both continuous and intermittent operations.

Working principle of activated carbon catalytic combustion equipment

In the industrial production process, the exhaust gas emitted enters the rotary valve of the equipment through the induced draft fan, and the gas and outlet gas are separated by the selector valve. The gas is first preheated through the ceramic material filling layer (bottom layer) to generate heat storage and exchange, and its temperature almost reaches the temperature set for catalytic oxidation in the catalytic layer (middle layer). At this point, some pollutants are oxidized and decomposed; The exhaust gas continues to heat up through the heating zone (upper layer, which can be heated by electric heating or gas heating) and maintained at the set temperature; It then enters the catalytic layer to complete the catalytic oxidation reaction, which generates CO2 and H2O and releases a large amount of heat to achieve the expected treatment effect.

Advantages:

1. Easy to operate, with automatic control achieved during device operation.

2. The device starts up and only takes 15-30 minutes to heat up to the ignition temperature. The energy consumption is only the fan power, and it automatically compensates when the concentration is low.

3. The honeycomb ceramic carrier catalyst impregnated with precious metals palladium and platinum today has a large specific surface area and low resistance,.

4. Waste heat can be returned to the drying oven, reducing the power consumption in the original drying oven; It can also be used as a heat source for other purposes.

5. Long service life, catalysts are usually replaced every two years, and the carrier is also used.

6. Not producing secondary pollutants such as nitrogen oxides (NOX);

7. Excellent purification efficiency;

8. Heat recovery rate.

9. Small footprint: only 70%~80% of similar products in the same industry, and there are no requirements for equipment foundation.