Activated carbon adsorption-desorption—catalytic combustion system utilizes the adsorption capacity of activated carbon to absorb organic matter from waste gases. Once the activated carbon is saturated, the adsorbed organic matter is desorbed by hot air. The desorbed high-concentration organic gases are then oxidized to carbon dioxide and water through catalytic combustion. The activated carbon, after desorption, can be reused. The activated carbon adsorption-desorption—catalytic combustion method has moderate investment costs and low operating expenses, and is widely used in VOCs waste gas treatment.

The system operation is divided into the following parts:

1) Adsorption Process: After collection, the waste gas undergoes pretreatment (dry filtration to remove particulate matter, preventing blockage of activated carbon), and then is pressurized by a fan before entering the adsorption tank. Organic matter is collected by the activated carbon, and the purified organic gas is released into the atmosphere through an exhaust stack.

2) Desorption: After a certain吸附 tower adsorption time, the activated carbon adsorbs until saturation. The吸附 tower then automatically switches to desorption mode. Fresh air is pressurized by a fan and sequentially passes through a heat exchanger and a heater, being heated to 70-100°C. The hot air then passes through the adsorption bed for thermal sweeping. The organic substances adsorbed by the adsorbent are desorbed and then enter the catalytic combustion chamber. The吸附 tower is equipped with multiple temperature sensors to monitor the temperature of various parts.

3) Catalytic Combustion: The high-concentration organic waste gases are heated to 200-350°C by the heat exchanger and heater inside the catalytic combustion furnace, then enter the catalytic bed. The organic matter undergoes flameless combustion on the catalyst surface, producing non-polluting carbon dioxide and water. The catalyst uses platinum-palladium precious metal catalysts, featuring high catalytic efficiency and a low ignition temperature.

4) Safety Control: Multiple temperature sensors are installed in the adsorption tower bed and catalytic combustion furnace. They monitor the temperature of various parts. When the temperature exceeds the set value, the system automatically switches to safety mode.

The adsorption bed is equipped with a spray system that automatically activates when the bed temperature exceeds a certain threshold, cooling the system.

The catalytic combustion rate is equipped with a combustible gas concentration detector. When the concentration of combustible gas exceeds 15% of the lower explosive limit, the system's emergency valve automatically opens, and the exhaust is automatically discharged into the chimney.

Features:

1. Honeycomb catalyst with low resistance and low ignition temperature.

2. The heat generated from the combustion and decomposition of waste gas can be recycled for further use, thereby saving operation costs.

3. Low VOCs concentration required; decomposition reaction is typically completed at around 200-350°C under catalyst action, without the need for auxiliary fuel.

4. Particularly suitable for handling continuous emissions of waste gases.

5. Fully automatic control, easy to operate, and high safety.

Application Fields:

1. Petroleum and Chemicals (such as plastics, rubber, synthetic fibers, organic chemicals)

2. Automotive and electronics industry exhaust gas treatment

3. Spraying, glass manufacturing industry, baked paint drying production lines, etc., organic waste gases