RTO (Regenerative Thermal Oxidizer) is an effective equipment for treating industrial exhaust gases, decomposing harmful substances in exhaust gases into harmless substances through high temperatures. However, not all gas concentrations are suitable for treatment with RTO furnaces. This article will ** the range of gas concentrations that are not suitable for RTO furnace processing.
First of all, we need to understand how the RTO furnace works. The RTO furnace mainly consists of a combustion chamber, a ceramic heat accumulator and a switching valve. During normal operation, the organic exhaust gas is first preheated to 760-820 and then enters the combustion chamber for oxidative decomposition. The oxidized high-temperature gas stores heat through a ceramic heat storage body and is used to preheat the newly entered organic exhaust gas. When the concentration of organic exhaust gas is low, the switching valve will automatically close to avoid the combustion chamber temperature being too high.
For gas concentrations that are not suitable for RTO furnace processing, we need to consider the following:
1. Concentration of volatile organic compounds (VOCs): Volatile organic compounds are one of the main objects of RTO furnace treatment, but not all volatile organic compounds are suitable for RTO furnace treatment. In general, VOCs below 25% LEL (volume fraction) are not suitable for RTO furnace processing. This is because the heat generated during the oxidation process by low concentrations of volatile organic compounds is not enough to maintain the temperature of the combustion chamber, resulting in poor oxidation. In addition, low concentrations of volatile organic compounds (VOCs) have a short residence time in the RTO furnace, which can lead to unstable treatment results.
2. Non-volatile organic compounds (NVOCs): Non-volatile organic compounds refer to those substances that cannot be directly combusted, such as ammonia, hydrogen sulfide, etc. These gases cannot react with oxygen in RTO furnaces, so they are not suitable for handling with RTO furnaces. In addition, high concentrations of non-volatile organic compounds (VOCs) can cause corrosion and clogging problems in RTO furnaces.
3. Toxic gases: Some highly toxic gases, such as chlorine, hydrogen sulfide, etc., are not suitable for RTO furnace treatment. These gases may produce toxic by-products during the oxidation process, which can be harmful to human health. At the same time, high concentrations of toxic gases can lead to safety issues for RTO furnaces.
4. Combustible gas: Although the RTO furnace can handle combustible gas, if the ratio of combustible gas to oxygen is out of balance, it may lead to accidents. Therefore, when using RTO furnaces to process combustible gases, it is necessary to strictly control the ratio of combustible gases to oxygen to ensure safe operation.
In summary, we can see that the range of gas concentrations that are not suitable for RTO furnace treatment includes: volatile organic compounds (VOCs) below 25% LEL, non-volatile organic compounds, highly toxic gases, and imbalance in the ratio of combustible gases to oxygen. In the actual engineering application, the appropriate waste gas treatment method should be selected according to the specific situation to ensure the effect and safety of waste gas treatment.