Air Filtration System
Mambretti Tech distributes and supports OMAR air filtration equipment, a leading company in the design, construction, installation and assistance of industrial systems for environmental protection. The experience in the foundries of Mambretti Metalli combined with the industrial expertise of the manufacturer allows us to offer specific solutions on the market for die-casting foundries and beyond, providing advice on regulations, 5.0 certification and the precise calculation of the energy savings that can be achieved.
Fumes aspiration from smelters
The operating steps of a melting furnace are loading, melting, scorification and picking. From the point of view of polluting fumes, the loading and scorification phases are the most critical since a huge volume of hot smoke with the presence of hydrochloric acid rises from the furnace at high speed. The solution is the design of a hood correctly sized and shaped to contain fumes and evacuate them quickly.
In the melting phase, on the other hand, the mass of the fumes is lower but at a higher temperature. In the case of temperatures above 200C, an air-to-air heat exchanger is provided and then directs the flow towards the filter. The cooling air of the exchanger is used to heat a water battery with the aim of saving calories and related energy costs.
In the case of remelting of sprues and recycled materials, it is possible to install a system for inerting acid substances through the injection of hydrated lime into the collector (in this case the filter works as a reactor).
All components are Atex certified to guarantee the safety of the system.
Aspiration of oily fumes from DCMs
In the die-casting process, significant quantities of fumes are developed: in fact, the release agent, in contact with the hot walls of the mould, vaporizes with a very high upward propagation speed. The capture of fumes takes place through the installation of suitably sized hoods equipped with motorized movement systems. The polluting smoke is conveyed into a main collector (inclined at an angle of 3%) and equipped with condensate drain systems along the critical points of the route. The filter is paneled and can have two or three stages. The first is made of pre-oriented metal wool (sort of grinder) while the second is an inertial separator made from an aluminum extrusion. The third (optional) is made up of polyester microfiber pockets.
Energy recovery
The air filtration solutions aimed at energy savings are very interesting, even because complying with all 5.0 requirements. In detail they include the design and installation of heat exchangers that recover the cooling air (heated by heat exchange) for additional plant needs. AHU air handling units are also proposed, with cross-flow heat recovery units capable of recovering Kcal and reducing heat input for the correct thermal balance. In addition, OMAR systems can use compressed air economizers and inverters for power management.