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废气处理活性炭Activated carbon for exhaust gas treatment 活性炭吸附法关键参数要求 1、活性炭过滤箱结构设计合理，不得让未经过滤的气体进入后续工艺流程，过滤后尾气中颗粒物含量<1mg/m。过滤箱应有压差计，压力过大时及时更换并记录。 2、活性炭填充量与每小时处理废气量体积之比应不小于1:5000，每 1 万 Nm/h 废气处理蜂窝活性炭吸附截面积不小于 2.3 ㎡，颗粒活性炭吸附截面积不小于 4.6 ㎡ 。 3、颗粒活性炭最好选择柱状活性炭，直径≤5mm，比表面积≥1200㎡/g，碘值≥800mg/g，四氯化碳吸附率≥45%；蜂窝活性炭的横向强度应不低于 0.3MPa，纵向强度应不低于0.8MPa，比表面积≥750㎡/g，碘值≥800mg/g，四氯化碳吸附率≥25%。 废气处理活性炭参数是指在活性炭的使用过程中，会发生什么现象。从以上几点可以看出，废气处理活性炭参数主要有：颗粒大小、表面官能团、表面碱性官能团和微孔结构等。 一、颗粒大小 活性炭的颗粒大小直接影响其吸附能力，颗粒越大，吸附能力越强。对工业生产上来说，根据生产需求选择合适的粒径，是提高活性炭吸附性能的关键。 二、表面官能团 在活性炭表面上有大量的官能团存在，主要是一些含氧官能团和羧基等亲水性较强的基团。 Key parameter requirements for activated carbon adsorption method 1. The structure design of the activated carbon filter box is reasonable, and unfiltered gas must not enter the subsequent process flow. The particulate matter content in the filtered exhaust gas is less than 1mg/m. The filter box should have a differential pressure gauge, which should be replaced and recorded in a timely manner when the pressure is too high. 2. The ratio of the filling amount of activated carbon to the volume of exhaust gas treated per hour should not be less than 1:5000. The adsorption cross-sectional area of honeycomb activated carbon for exhaust gas treatment should not be less than 2.3 square meters per 10000 Nm/h, and the adsorption cross-sectional area of granular activated carbon should not be less than 4.6 square meters. 3. It is best to choose columnar activated carbon for granular activated carbon, with a diameter of ≤ 5mm, a specific surface area of ≥ 1200 ㎡/g, an iodine value of ≥ 800mg/g, and a carbon tetrachloride adsorption rate of ≥ 45%; The transverse strength of honeycomb activated carbon should not be less than 0.3MPa, the longitudinal strength should not be less than 0.8MPa, the specific surface area should be ≥ 750 ㎡/g, the iodine value should be ≥ 800mg/g, and the carbon tetrachloride adsorption rate should be ≥ 25%. The parameters of activated carbon for exhaust gas treatment refer to the phenomena that occur during the use of activated carbon. From the above points, it can be seen that the parameters of activated carbon for exhaust gas treatment mainly include particle size, surface functional groups, surface alkaline functional groups, and microporous structure. 1、 Particle size The particle size of activated carbon directly affects its adsorption capacity, and the larger the particles, the stronger the adsorption capacity. For industrial production, selecting the appropriate particle size according to production needs is the key to improving the adsorption performance of activated carbon. 2、 Surface functional groups There are a large number of functional groups on the surface of activated carbon, mainly oxygen-containing functional groups and carboxyl groups with strong hydrophilicity. |
