By utilizing variable frequency drum zeolite (activated carbon) to adsorb organic waste gas, low concentration and high air volume waste gas can be concentrated to high concentration and low air volume, thereby reducing equipment and operating costs and achieving efficient VOCs treatment. Utilizing the high-temperature gas mixture after catalytic combustion for desorption regeneration, achieving an uninterrupted adsorption desorption process.
1、 Concept of a complete set of equipment for variable frequency drum zeolite (activated carbon)+catalytic combustion
By utilizing variable frequency drum zeolite (activated carbon) to adsorb organic waste gas, low concentration and high air volume waste gas can be concentrated to high concentration and low air volume, thereby reducing equipment and operating costs and achieving efficient VOCs treatment. Utilizing the high-temperature gas mixture after catalytic combustion for desorption regeneration, achieving an uninterrupted adsorption desorption process.
2、 Working principle
The treated air containing VOCs is sent to the treatment area of concentrated variable frequency drum zeolite (activated carbon) after pre filtration. VOCs are adsorbed and removed by adsorbents in the processing area, and the air is purified before being discharged from the processing section of the concentrated activated carbon drum. The VOCs adsorbed in the concentration drum are desorbed and concentrated (to a degree of 5-20 times) through hot air treatment in the regeneration zone. After highly concentrated VOCs are desorbed, they enter the heat exchanger for further heating before being sent to the heating chamber. Through the heating device, the gas reaches the catalytic reaction temperature, and then the organic gas is decomposed into carbon dioxide, water, and heat energy by the catalyst in the catalytic bed. The reacted gas then enters the heat exchanger for heat exchange with low-temperature gas to preheat the incoming gas. In this way, the heating system only needs to compensate for heating through the automatic control system to achieve complete combustion, greatly saving energy and meeting national emission standards.
3、 Selection conditions and characteristics of CO catalytic combustion
1. The exhaust gas must not contain components that can poison or permanently deactivate the catalyst, such as chlorine, sulfur, halogens, heavy metals, etc.
2. The mixed exhaust gas concentration entering the catalytic combustion equipment is less than 1/4LEL within the lower explosive limit range.
3. The maximum temperature for catalytic combustion is ≤ 600 ℃. High temperature substances and high concentration gases need to be diluted to prevent catalyst deactivation and inability to carry out catalytic reduction reactions due to overheating in the reaction chamber.
4. The gas entering catalytic combustion must not contain dust particles or oil mist that can clog or cause flashback.
