Dan-ECO²

To minimize the environmental impact, Danieli is committed to continuous improvement of and investment in a process that reduces the exhaust emissions of aluminum cold rolling mill to meet and exceed the requirements of environmental regulations.

For the separation of Volatile Organic Compounds (VOCs), Dan-ECO² is an ecologically effective system.
Furthermore, not only is this method ECO-logically efficient, it is also ECO-nomically efficient as it allows the recovery by distillation of the absorbed rolling oil without chemically altering its state.

Description of the process:

Each boundary layer has a chemical equilibrium on each side. This means that each time the same amount of VOC molecules goes into the gas film and leaves the gas film. A part of it goes back to the gas phase while a portion moves into the liquid film. This phenomenon is produced on the Sulzer MellapakPlus™ or equivalent packing structures that are incorporated in our system. 

The process of absorption to distillation operates in an automated, closedloop cycle, continuously monitored by a range of instrumentation throughout the system and acts as a standalone unit.
The absorption process of the rolling oil into high boiling absorptive oil is heavily dependent on temperature and pressure. Therefore, the rolling oil is regenerated through the application of high temperature and low pressure in the closed-loop on the distillation unit, as shown in the diagram below.
Danieli Automation developed the automation system for Dan-ECO² in order to guarantee a strong synergy between process and software within the group.