Renovation of exhaust gas adsorption unit
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Our company’s 180,000-ton peroxide production project has been in operation for 3 years; the oxidation exhaust gas is separated through expansion refrigeration, and then discharged after being adsorbed by an exhaust gas treatment unit. Currently, there are issues with exhaust emissions not meeting standards and high aromatic hydrocarbon consumption. To address these problems, we plan to upgrade the exhaust treatment units. Originally, there were 3 boxes with 8 cores each: 2 boxes for adsorption and 1 box for regeneration (desorption and drying). We plan to add another adsorption box, so that there will be 2 boxes for adsorption, 1 box for desorption, and 1 box for drying. This will reduce the adsorption time and decrease the amount of material processed by each adsorption box ； Then secondary adsorption is added to reduce the aromatic hydrocarbon content in the exhaust gases to below 40 mg/cubic meter, ensuring compliance with emission standards; this allows for the full recovery of aromatic hydrocarbons and reduces consumption
Not many domestic hydrogen peroxide manufacturers use secondary adsorption for oxidizing exhaust gases; most of them opt for expanders combined with activated carbon fiber adsorption. Based on your description, it seems to be the treatment method I mentioned. It is recommended to add an activated carbon fiber adsorption box to the system for treating oxidized exhaust gases, and to use activated carbon for the second stage of treatment; this should yield better results. There are domestic devices that use activated carbon for the adsorption of hydrogen peroxide
What material do you use for the shell of the adsorption box?