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Catalytic combustion equipment is mainly composed of heat exchanger, catalytic bed, electric heater, combustion chamber and heat regenerator. The heating tubes preheat the equipment. Driven by the fan, the system provides temperature conditions (80～120°C) for activated carbon desorption. The desorbed waste gas enters the catalytic combustion chamber. Under the effect of the catalytic bed, organic pollutants are oxidized and decomposed into small molecular compounds such as water and carbon dioxide at 250~350°C. The heat of qualified exhaust gas is recycled by the heat exchanger to achieve energy saving.
1. Uniform airflow and temperature distribution: Sufficient length and internal space of the combustion chamber ensure uniform airflow and temperature on the catalyst surface, avoiding direct flame contact. The equipment is designed with good thermal insulation. The furnace body adopts steel shell lined with refractory materials or double-layer wall structure.
2. Easy cleaning and replacement: The catalyst reactor adopts a drawer-type structure for easy disassembly, which facilitates cleaning and replacement of catalyst carriers.
3. Auxiliary fuel and combustion-supporting gas: Natural gas is commonly used as auxiliary fuel; fuel oil and electric heating are also available. Purified gas is preferentially used for combustion supporting. If purified gas cannot meet the requirement, fresh air will be introduced.
4. High reaction conversion rate: Catalytic combustion is an irreversible exothermic reaction. Higher operating temperature helps improve conversion efficiency. However, the actual working temperature is limited by catalyst heat resistance, high-temperature material performance, heat supply and side reactions. Therefore, the operating temperature shall be reasonably selected according to actual working conditions.
