Welcome to BAOLAN EP INC.
24-Hour Hotline
- Carbon Capture Utilization
- VOCs series
- DeSOx-DeNOx-Dedust
- Consumables
Contact Baolan
Address: Jurong East Road, Huantai Industrial Park, Zibo City, Shandong Province
Tel: +86-135-8959-1050
E-mail: [email protected]
Tel: +86-135-8959-1050
E-mail: [email protected]
Industry Knowledge
Combustion method for controlling VOCs
时间: 2025-04-09 09:58
The combustion method is divided into several categories, including direct combustion, thermal combustion, and catalytic combustion.
The process of converting harmful gases, vapors, liquids, or smoke into harmless substances through combustion is called combustion purification, also known as incineration. The combustion method is suitable for treating VOC waste gases with relatively high concentrations, and the removal rate is generally over 95%.
The chemical reactions that occur during combustion purification mainly involve combustion oxidation and thermal decomposition at high temperatures, so this method is only suitable for purifying those harmful substances that are combustible or can decompose at high temperatures.
The chemical reactions that occur during combustion purification mainly involve combustion oxidation and thermal decomposition at high temperatures, so this method is only suitable for purifying those harmful substances that are combustible or can decompose at high temperatures.
The combustion method is divided into several categories, including direct combustion, thermal combustion, and catalytic combustion.
Among them, the direct combustion method rapidly converts VOCs into CO2 and H2O at higher temperatures, generally above 1100°C, and is suitable for treating high concentrations of organic waste gas, with VOCs concentration ranging from 5000 to 10000 mg/m3.
Thermal combustion is generally used for treating organic waste gas with a concentration of 500-5000 mg/m3, where the waste gas itself is not used as fuel but serves as a combustion-supporting gas during the combustion process, requiring a lower reaction temperature, typically maintained at 540 to 820°C.
Among them, the direct combustion method rapidly converts VOCs into CO2 and H2O at higher temperatures, generally above 1100°C, and is suitable for treating high concentrations of organic waste gas, with VOCs concentration ranging from 5000 to 10000 mg/m3.
Thermal combustion is generally used for treating organic waste gas with a concentration of 500-5000 mg/m3, where the waste gas itself is not used as fuel but serves as a combustion-supporting gas during the combustion process, requiring a lower reaction temperature, typically maintained at 540 to 820°C.
Catalytic combustion, also known as flameless combustion, has a catalytic oxidation temperature range of 370 to 480°C and can be applied to a wide concentration range, from 2000 to 6000 mg/m3.
1.Direct combustion method
Direct combustion, also known as direct flame combustion, can burn directly in the air due to the high concentration of combustible components in the waste gas itself, allowing harmful substances to decompose into harmless materials under high temperatures; this method has a simple process and low investment, making it suitable for high concentration and low airflow waste gas.
Direct combustion equipment includes general combustion furnaces, kilns, or devices that direct waste gas into boilers to be burned as fuel gas, which is not suitable for handling low concentration gases. In oil refineries and petrochemical plants, flares are often used as safety measures for gas production devices and reaction tail gas devices during startup, shutdown, and accident handling. However, due to issues such as material balance, production management, and inadequate recovery equipment, processed oil gas and fuel gases are sometimes also discharged to the flare for combustion. Flare combustion not only produces a large amount of harmful gases, smoke, and thermal radiation that harm the environment but also results in significant losses of useful fuel gas, so flare combustion should be minimized and prevented as much as possible.
2.Thermal combustion method
Generally used for handling situations where the concentration of combustible components in waste gas is low. Due to the very low concentration of combustible components in the waste gas, the heat released during the combustion process is insufficient to meet the heat required for combustion. Therefore, the waste gas itself cannot be used as fuel and must have auxiliary fuel as the combustion-supporting gas. During the combustion of the auxiliary fuel, the combustible components in the waste gas are destroyed. Compared to direct combustion, the temperature required for thermal combustion is generally lower, typically between 540 and 820°C.
3.Catalytic combustion method
Catalytic combustion method is a technique that uses suitable catalysts in a system to oxidize and decompose organic substances in waste gas at lower temperatures. Catalytic combustion technology is a new type of technology that has emerged in response to the increasingly urgent demands for environmental protection and energy conservation over the past few decades.
The main advantages of this method are:
① low ignition temperature and low energy consumption;
② high treatment efficiency, no secondary pollution, wide range of organic substance concentration and composition treatment, low startup energy consumption, and the ability to recover some of the output thermal energy with small equipment size and low cost.
The main disadvantage of the catalytic combustion method is that when the concentration of organic waste gas is too low, a large amount of external heat needs to be supplemented to maintain the catalytic reaction.
1.Direct combustion method
Direct combustion, also known as direct flame combustion, can burn directly in the air due to the high concentration of combustible components in the waste gas itself, allowing harmful substances to decompose into harmless materials under high temperatures; this method has a simple process and low investment, making it suitable for high concentration and low airflow waste gas.
Direct combustion equipment includes general combustion furnaces, kilns, or devices that direct waste gas into boilers to be burned as fuel gas, which is not suitable for handling low concentration gases. In oil refineries and petrochemical plants, flares are often used as safety measures for gas production devices and reaction tail gas devices during startup, shutdown, and accident handling. However, due to issues such as material balance, production management, and inadequate recovery equipment, processed oil gas and fuel gases are sometimes also discharged to the flare for combustion. Flare combustion not only produces a large amount of harmful gases, smoke, and thermal radiation that harm the environment but also results in significant losses of useful fuel gas, so flare combustion should be minimized and prevented as much as possible.
2.Thermal combustion method
Generally used for handling situations where the concentration of combustible components in waste gas is low. Due to the very low concentration of combustible components in the waste gas, the heat released during the combustion process is insufficient to meet the heat required for combustion. Therefore, the waste gas itself cannot be used as fuel and must have auxiliary fuel as the combustion-supporting gas. During the combustion of the auxiliary fuel, the combustible components in the waste gas are destroyed. Compared to direct combustion, the temperature required for thermal combustion is generally lower, typically between 540 and 820°C.
3.Catalytic combustion method
Catalytic combustion method is a technique that uses suitable catalysts in a system to oxidize and decompose organic substances in waste gas at lower temperatures. Catalytic combustion technology is a new type of technology that has emerged in response to the increasingly urgent demands for environmental protection and energy conservation over the past few decades.
The main advantages of this method are:
① low ignition temperature and low energy consumption;
② high treatment efficiency, no secondary pollution, wide range of organic substance concentration and composition treatment, low startup energy consumption, and the ability to recover some of the output thermal energy with small equipment size and low cost.
The main disadvantage of the catalytic combustion method is that when the concentration of organic waste gas is too low, a large amount of external heat needs to be supplemented to maintain the catalytic reaction.
Copyright © 2014-2023 BAOLAN EP INC.
Telephone: +86-135-8959-1050 E-mail: [email protected]
Address: Jurong East Road, Huantai Industrial Park, Zibo City, Shandong Province
