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How to control the exhaust gas concentration of catalytic combustion system

2021-10-30

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How to control the exhaust gas concentration of catalytic combustion system?
1. An appropriate concentration of exhaust gas can ensure the safe and efficient treatment of exhaust gas in the catalytic combustion system, and it is also beneficial for extending the service life of equipment and catalysts.
2. Low content: A large amount of energy is used to heat the air, resulting in high energy consumption and insufficient reaction heat release to maintain the system's self heating combustion. In this case, it is recommended to concentrate the exhaust gas.
3. Concentration: Explosion hazard; If the temperature rises too high and the combustion temperature exceeds 600 degrees for a long time, it will cause damage to the equipment and catalyst. In this case, it is recommended to add fresh air to dilute the exhaust gas to below the lower explosion limit.
Tail gas pretreatment can improve the service life of catalysts and catalytic combustion devices
1. The exhaust gas may contain harmful components to the catalyst. If this chemical substance is known to exist, the exhaust gas should be pre-treated. Otherwise, these components will have a significant impact on the lifespan of the catalyst.
2. The exhaust gas must undergo pre-treatment (dust removal, oil removal, and dehumidification) before entering the catalytic device. Dust, carbon deposition, and high boiling adhesive adhere to the surface of the catalyst, covering the active site of the catalyst, which can cause catalytic action of the catalyst. Therefore, the introduction of dust and high boiling adhesive should be avoided.
3. When the humidity is high and the temperature is high, water vapor and oil mist are prone to react with the catalyst, leading to the deactivation of the catalyst during sintering. It is necessary to minimize the entry of water vapor and oil mist into the catalyst bed as much as possible.

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