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At what pressure drop does the activated carbon need to be replaced?
At what pressure drop does the activated carbon need to be replaced?In general, when the pressure drop of the activated carbon adsorption box increases by more than 50% to 100% compared to the initial operating pressure drop, it is usually necessary to consider replacing the activated carbon, but this is not an absolute standard, the following are analyzed from different working conditions and specific factors:Pressure drop reference under different working conditions Exhaust gas treatment condition In the treatment of general industrial organic waste gas, if the initial pressure drop is between 200-500Pa, when the pressure drop rises to 300-1000Pa, it may be necessary to replace the activated carbon. For example, in the organic waste gas treatment of some electronics factories, the initial pressure drop is 300Pa. When the pressure drop reaches 600Pa and above, the activated carbon may be adsorbed saturated, or blocked, affecting the airflow through. For the treatment of high temperature, high humidity exhaust gas, due to moisture and high temperature may lead to activated carbon being more easily blocked and performance decline, the pressure drop rises to about 50% of the initial, that is, it may need to be replaced. For example, in the high temperature and high humidity waste gas treatment of some printing and dyeing plants, the initial pressure drop is 400Pa, and when the pressure drop reaches 600Pa, it is necessary to pay attention to the status of activated carbon and consider replacing it. Wastewater treatment condition When treating urban domestic sewage or general industrial wastewater, the initial pressure drop of the activated carbon adsorption tank may be between 100-300kPa. When the pressure drop rises to 150-600kPa, it is necessary to consider replacing the activated carbon. For example, in the advanced treatment of urban sewage treatment plants, the initial pressure drop is 200kPa, and when the pressure drop reaches more than 300kPa, it may mean that the activated carbon adsorbs a large number of suspended solids and pollutants, resulting in pore blockage. For the treatment of wastewater containing high concentrations of heavy metal ions or viscous substances, the rise in pressure drop may be more pronounced. When the pressure drop rises more than 60%-80% of the initial, it is necessary to replace the activated carbon in time to ensure the treatment effect and normal operation of the system. Other influencing factors Equipment design and specifications: In a large activated carbon adsorption box, due to the relatively large airflow channel, the allowable fluctuation range of pressure drop may be larger; The change of pressure drop in the small adsorption chamber is more sensitive to the overall performance, and the activated carbon may need to be replaced if the pressure drop increases by 40%-80%. Process requirements: In some processes that require very high treatment effects and stability, such as waste gas or wastewater treatment in pharmaceutical, food processing, and other industries, it may be necessary to replace the pressure drop by 30%-50% to ensure product quality and the stability of the production environment. |
