I would like to ask how to effectively deal with formaldehyde and xylene exhaust gases?
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I would like to ask everyone: How should formaldehyde and xylene emissions generated during the production process be treated? What are the most suitable methods for handling them, and what kind of equipment is used to meet environmental emission standards? Thank you all
The technologies or equipment to be used are directly related to the characteristics of the exhaust gases; absorption and adsorption methods can be employed when the concentration is low, while equipment such as condensers may be necessary when the concentration is high； In short, only when the characteristics of the exhaust gas are fairly well known can it be determined what kind of technology or equipment should be used. This is just my humble opinion; I hope those more knowledgeable can offer some guidance :)
Thank you for the help from the second floor. The concentration of these exhaust gases generated in our production process is quite low; as for the specific figures, we are unable to provide them at the moment.
Formaldehyde is highly toxic; it should first be adsorbed using carbon fiber or activated carbon, and after desorption and concentration, it can be incinerated through catalysis. Recovery isn’t easy... I specialize in the treatment of organic waste gases; if you need such services, contact me. Hehe, Beijing Lvc Create wuyan808@126.com
For organic exhaust gases, activated carbon adsorption can be considered as a preferred option; the use of activated carbon fibers yields even better adsorption results. If the amount of waste is small, the activated carbon after adsorption can be sent to a solid waste treatment facility. In cases where the amount is large, the activated carbon can be regenerated, and the recovered formaldehyde or xylene can be recycled.
If the concentration is relatively low, adsorption may be a good treatment option. However, if the volume of gas is large, it is necessary to consider the impact of operating costs on the entire process. A solution with good economic and technical viability must be determined based on the specific data of the gas :)
Furthermore, according to relevant adsorption data, formaldehyde does not easily adsorb onto activated carbon; therefore, using only activated carbon adsorption to remove both formaldehyde and xylene simultaneously is not, in my opinion, a good solution. I would appreciate some advice from those who are more experienced :)
Concentration: What is the air volume? Without these basic conditions determined, it’s hard to choose the appropriate treatment method
If the volume of gas is particularly large, and activated carbon is used for adsorption, does that mean the adsorption tower has to be very large? I don’t quite understand. Could you explain it? Also, can this exhaust gas be handled through membrane separation? Hope someone knowledgeable can answer
1. It can undergo catalytic combustion to recover heat. 2. Large chemical enterprises all have flares, which can be used for treatment.
Activated carbon is used to adsorb organic gas pollutants; it is feasible even when the amounts are small, as the low quantities combined with the strong adsorption capacity of activated carbon ensure that the adsorption requirements are met. However, when the volume is relatively large, the adsorption method requires careful consideration. Not only is it difficult to determine the adsorption capacity of activated carbon, but releasing air once that capacity has been exceeded can have serious consequences. Even the equipment needed for regenerating activated carbon is expensive, and the regeneration process itself is costly as well; as a result, the overall treatment costs are beyond what many companies can afford. It might be better to use other methods, such as incineration or strong oxidation.