In order to solve the environmental issue and deal with highly variable emission flow rates and considerable solvent mass flows, a regenerative thermal oxidation plant combined with a heat recovery system for diathermic oil heating has been installed.
The diathermic oil heats the drying sections of the printing machines allowing to reuse the energy in the same production process that generated the polluting emission.
THE MEASURES IDENTIFIED FOR APPLICATION IN THE FLEXIBLE PACKAGING INDUSTRY
Regenerative thermal oxidation is frequently used to treat atmospheric emissions containing V.O.C. released during flexible packaging printing processes, when solvent recovery is not possible nor convenient due to the quantity and composition of the solvents used.
The application in the flexible packaging industry had to provide for the identification and application of specific measures aimed at enabling the following goals:
- The achievement of the highest purification performance, through a specific sizing of the process parameters.
- The optimization of energy consumption, thanks to the identification of an interesting form of energy recovery, to be used in the production process.
- The reduction of secondary pollutants produced by the oxidation process.
- The absence of interference with the production process, which requires the absolute absence of perturbations to the printing process.