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廢氣處理活性炭Activated carbon for exhaust gas treatment 活性炭吸附法關鍵參數要求 1、活性炭過濾箱結構設計合理，不得讓未經過濾的氣體進入后續工藝流程，過濾后尾氣中顆粒物含量<1mg/m。過濾箱應有壓差計，壓力過大時及時更換并記錄。 2、活性炭填充量與每小時處理廢氣量體積之比應不小于1:5000，每 1 萬 Nm/h 廢氣處理蜂窩活性炭吸附截面積不小于 2.3 ㎡，顆粒活性炭吸附截面積不小于 4.6 ㎡ 。 3、顆粒活性炭最好選擇柱狀活性炭，直徑≤5mm，比表面積≥1200㎡/g，碘值≥800mg/g，四氯化碳吸附率≥45%；蜂窩活性炭的橫向強度應不低于 0.3MPa，縱向強度應不低于0.8MPa，比表面積≥750㎡/g，碘值≥800mg/g，四氯化碳吸附率≥25%。 廢氣處理活性炭參數是指在活性炭的使用過程中，會發生什么現象。從以上幾點可以看出，廢氣處理活性炭參數主要有：顆粒大小、表面官能團、表面堿性官能團和微孔結構等。 一、顆粒大小 活性炭的顆粒大小直接影響其吸附能力，顆粒越大，吸附能力越強。對工業生產上來說，根據生產需求選擇合適的粒徑，是提高活性炭吸附性能的關鍵。 二、表面官能團 在活性炭表面上有大量的官能團存在，主要是一些含氧官能團和羧基等親水性較強的基團。 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. |
