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Heatset Drying

Drying is performed with hot gas fed in instead of the old method of burning natural gas.

The hot gas that cools during the drying process carries mineral oil, water and VOCs back to the resource recovery system.

Heatset Drying

The hot gas-powered drying process saves several cubic metres of natural gas a day compared to the previous method of burning natural gas.

The use of hot gas also reduces CO2 emissions in the printing process to make the process CO2-free.


Heatset drying

At the end of the printing process in the heatset method, the printed, wet paper webs need to be dried. In conventional heatset printing, this is done using separately operated technical dryers. The process of generating the heat required, however, is extremely energy-intensive and leads to a high additional use of final energy.

Completely different
The hot gas supplied with the help of hot gas logistics is fed to the printing presses' dryers separately during the drying stages. The hot gas, when it reaches the first stage of the drying process, has a temperature of around 360°C. With the addition of ambient air, the temperature in the first stage is reduced to around 280°C. In the second stage, the temperature after the addition of ambient air is 180°C, and 120°C in the third and final stage. At Jungfer, the entire process is completely different. This is because we have completely turned this technically essential process on its head and redesigned it from scratch. With gas combustion in our own turbine power plant, we produce not only electricity but also automatically around 7,000 kW of hot gas - which is more than enough to supply our dryer systems directly with the hot air they need. The high, but most importantly additional energy demands associated previously with generating this hot air are therefore completely obsolete. At the same time, however, we also use the hot gas for another process that is completely new and revolutionary in the printing industry: the recovery of resources.

Avoiding emissions.
It is through the intelligent linking of a whole series of fundamental technical changes that we have established a heatset printing process at Jungfer that is unique in the industry: no carbon dioxide emissions. This has been made possible thanks to a completely new drying method that uses no separate energy feed, which allows the virtually complete recovery of all of the volatile components contained in the dryer exhaust air and - as a result - the removal of the thermal afterburning stage associated with the usual considerable emissions produced by the printing process.
 CO2-free printing