For the packaging and printing industry VOCs exhaust treatment, should still implement the policy of priority recovery of resources, really can not be recycled, can consider adopting other technologies or a combination of technologies. Adsorption method is generally used to treat VOCs in the packaging and printing industry, which is currently more effective than the other methods.
Recovery processes include absorption and adsorption. Among them, the adsorption method can realise the recycling of solvents, and from the perspective of circular economy, it should be the preferred process.
Packaging and printing industry is currently operating in the domestic situation is basically in a micro-profit state, if the VOCs through the adsorption technology, so that the recycled solvents can be reused, not only to achieve environmental protection, but also reduce production costs, which should be the first choice for people to consider the issue of end-of-pipe treatment. In foreign countries, there are also more and more manufacturers from RTO technology to use adsorption technology, or a combination of two processes to deal with VOCs. especially in Italy, the majority of composite flexible packaging manufacturers choose this technology.
The adsorbent for the adsorption method can be granular activated carbon or activated carbon fibres; desorption can be done using water vapour or inert gas as desorbent. For V()Cs control in the printing industry, inert gases (such as nitrogen) are generally used as desorbents. This is because when water vapour is used for desorption, the recovered ethyl acetate may not be reused due to the hydrolysis reaction that leads to acid change.
At present, the technology of adsorption method to recover VOCs emitted from the packaging and printing industry is quite mature, and most of them use activated carbon as adsorbent and nitrogen as desorbent. Detailed programme and quotation information you can contact us to get Oh~!
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