Latest technologies for treating high-concentration chlorine- and halogen-containing exhaust gases
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Chlorine is often used in chemical processing plants; as a result, the exhaust gases emitted by some of these plants contain large amounts of chlorinated organic compounds. These waste gases are difficult to recover, and thermal incineration not only requires high energy levels but also tends to produce dioxins. Handling such exhaust gases is extremely challenging. We have now subjected the catalysts used in catalytic incineration to special treatment, which significantly improves their resistance to halogens as well as their catalytic activity. This enables the catalytic incineration process to handle exhaust gases with high concentrations of chlorine and other halogens, with low energy consumption and excellent treatment results. The actual outcomes have disproven the previous claim that catalytic incineration cannot be used to treat exhaust gases with high chlorine content.
High concentration~~Question: What concentration level can be considered “high concentration”?
Does this mean that dioxins are not produced after incineration?
Is the poster talking about RTO? Is it the catalyst used in the SCR for nitrogen oxide removal from the flue gases generated by the incineration of solids, liquids, gases, and waste? I’m a bit confused.
Are there any successful performance records for this? Could you explain the catalytic mechanism?
At certain temperatures, the chlorinated hydrocarbons in the exhaust gases undergo catalytic oxidation reactions with oxygen on the surface of halogen-resistant precious metal catalysts, converting the organic chlorinated hydrocarbons into carbon dioxide, water, and hydrogen chloride. The exhaust gas exiting the reactor is then cooled through heat exchange, and hydrogen chloride is removed via alkaline washing. This type of process has been applied in many applications, such as in PTA/PIA/methane chloride production facilities. Depending on the model, the catalyst can contain 100-5000 ppm of sodium chloride.
Reactor temperatures of three to four hundred degrees will not produce dioxins