Does organic waste gas treatment equipment need to replace adsorbent regularly?

Yes, the adsorbents in organic waste gas treatment equipment (such as activated carbon, zeolite and other materials) are like "air purifier filters". After long-term use, they will absorb pollutants and must be replaced regularly. To give a simple example, activated carbon is like a sponge. When it is first used, it has a very strong suction force and can firmly grasp the harmful substances in the exhaust gas, but after a long time, the sponge will be full of water and can no longer absorb it. If it is not replaced at this time, the exhaust gas treatment effect will be greatly reduced. Not only may it be fined for exceeding the emission standard, but it may even cause secondary pollution due to the release of pollutants after the adsorbent is saturated.
How often to change it depends mainly on the actual situation of the factory. For example, in places such as paint spraying workshops with high exhaust gas concentration and pungent odor, activated carbon may have to be replaced every two months; while in workshops such as packaging factories with relatively "light" exhaust gas, it may only be replaced once every six months. However, most factories generally change it every 3 to 6 months. There are many factors that affect the frequency of replacement, such as how high the concentration of pollutants in the exhaust gas is, how long the equipment is turned on every day, what kind of adsorbent is used (honeycomb carbon is more durable than granular carbon), and even humid weather will make the activated carbon "unable to absorb" faster.
When you change it, you can't just take it out and throw it away. Because the old activated carbon is full of harmful substances, it is considered hazardous waste and must be handed over to professional companies for disposal. It cannot be thrown away as ordinary garbage, otherwise it may pollute the soil or groundwater. In order to save money, some factories will dry the used activated carbon and continue to use it, but this is like wringing out a dirty rag and then using it. The effect will only get worse and worse, and it may also cause the risk of spontaneous combustion - because the adsorbed organic matter is easy to react and release heat at high temperatures.