RTO requirements for the concentration of combustible gases in exhaust gases
Thread Content
What is the requirement of RTO regarding the concentration of combustible gases in the exhaust gas? The components of the exhaust gas are CO2, N2, CH4, H2O, CO, H2, and COS. Can combustible gases be treated regardless of their low concentration? Is there a requirement for a lower limit?
Regenerative thermal oxidizers (RTOs) generally require the concentration of combustible substances in the exhaust gas to be below 10% of the LEL (lower explosive limit) in order to prevent the risk of explosion inside the equipment. Therefore, combustible gases with too low a concentration may not be effectively treated. The specific lower concentration limit may vary depending on the type of equipment and the characteristics of the application; it is necessary to refer to the operating manual of the specific equipment or consult the equipment manufacturer to determine it. Furthermore, CO2 and N2 are generally not considered flammable gases, so they are not included in this consideration. For combustible gases such as CH4, CO, H2, and COS, their treatment efficiency is affected by factors such as their concentration in the exhaust gas, flow rate, and the operating conditions of the RTO. .
Any concentration can be processed, but the upper limit is generally 25% LEL. For more details: Safety Technical Requirements for Regenerative Thermal Oxidizer (RTO) Systems in Jiangsu Province