VOCs waste gas treatment maintenance Xiamen catalytic combustion

Description :

　　Catalytic combustion is a purification method that uses catalysts to oxidize and decompose combustible substances in exhaust gas at lower temperatures. So, catalytic combustion is also known as catalytic chemical conversion. Due to the acceleration of the oxidation decomposition process by the catalyst, most hydrocarbons can be completely oxidized by the catalyst at temperatures of 300-450 ℃.

　　Compared with the thermal combustion method, catalytic combustion requires less auxiliary fuel, consumes less energy, and has smaller equipment and facilities. However, the promotion and application of this method in industrial production processes have been affected by issues such as catalyst poisoning, replacement of catalytic beds, and high cleaning costs.

　　1) Low ignition temperature, fast reaction rate, and energy saving. During catalytic combustion, the catalyst plays a role in reducing the activation energy of VOCs molecules reacting with oxygen molecules and changing the reaction pathway.

　　2) High processing efficiency, low emissions of secondary pollutants and greenhouse gases. The purification rate of VOCs exhaust gas treated by catalytic combustion is usually over 95%, and the final products are mainly CO2 and H2O. Due to the low temperature of catalytic combustion, the generation of NOx is greatly reduced. The CO2 emissions from auxiliary fuel consumption account for a large proportion of the total CO2 emissions, and the reduction in auxiliary energy consumption clearly reduces greenhouse gas CO2 emissions.

　　3) Widely applicable, catalytic combustion can treat almost all hydrocarbon organic waste gases and odorous gases, and is suitable for treating a wide range of VOCs concentrations. It is economically reasonable to use catalytic combustion method to treat VOCs waste gas with low concentration, high flow rate, multiple components and no recycling value.

　　The main features of RCO type exhaust gas treatment catalytic combustion equipment and high-temperature air combustion technology are:

　　1. Adopting a high-temperature air flue gas waste heat recovery device, alternately switching between air and flue gas to flow through a thermal storage body, can largely recover the sensible heat of high-temperature flue gas, thus achieving waste heat recovery;

　　2. Preheat the combustion air to a temperature level of over 1000 ℃ to form a new type of flame that is distinct from traditional flames such as diffusion flames and premixed flames, creating an excellent uniform temperature distribution inside the furnace;

　　3. By organizing combustion in a lean oxygen state, the significant generation of high-temperature thermal nitrogen oxides (NOx) under normal conditions is avoided. Therefore, this technology has generated significant economic and social benefits in practical applications.

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