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Resource recovery

During the drying stage, volatile components contained in the printing ink - such as water, mineral oils and hydrocarbons - evaporate. This produces contaminated exhaust air which needs to be cleaned before it is released back into the environment. The conventional way of doing this involves thermal afterburning. With this method, not only are valuable raw materials destroyed, but considerable quantities of CO2 are emitted too.

Drop by drop
A conventional method that we have done away with since the autumn of 2012 and replaced with a completely new solution. We cool the exhaust air from the dryers, which is laden with volatile components, in a controlled manner across several temperature stages. The energy for this cooling process - after further conversion - comes from the hot gas from the turbine power plant. As they cool, the raw materials contained in the exhaust air condense out almost completely, are captured and are then fed back into the materials cycle. As a result, afterburning and the emissions that come with it are now a thing of the past.

CO2-free printprocess.
Simply the right result! Coming up with a virtually carbon dioxide-free printing process using heatset web offset is the product of a wealth of individual innovations. Supplying the printing presses with energy alone calls for a massive increase in efficiency, since printing presses require two types of energy: electricity and hot gas. The hot gas which replaces the previous natural gas burners can only be used with heatset drying since the exhaust air from the dryers is cleaned as part of the resource recovery process to comply with the legal guidelines for hazardous substances, and not - as previously - through thermal afterburning, but instead through condensation, distillation and adsorption.
More information:
 CO2-free printing