For pollution with less saturation, with the advantage of the complete regeneration of the filters when saturated.
An activated carbon (or zeolit) filter is used to filter the emissions. When the filter is full, our system is detecting the saturation and sends at this time automatically the air towards another active coal (or zeolit) filter .
It launches (automatically) the regeneration of the dirty filter. Calories are also present at this moment to be reused in the production, if needed.
Several filters, placed on different places of the industry, can so be regenerated by the same system.
The process applied is the adsorption on activated carbon, highly efficient technology, known since many years, with the regeneration ‘in situ’ of filters saturated with solvent.
What kind of technology is used today?
- The limits of activated carbon filters, in general, with regard to the adsorption phase on the carbon, are mainly determined by the high cost and logistical problems due to the periodic replacement of saturated carbons
- As for regeneration in situ, so far carried out using a current of steam or hot nitrogen, it has the disadvantage of large energy consumption and large installations, often complex, especially if the distillation columns are provided for the solvent recovery: in most cases, recovered solvent has become more expensive than new solvent
Our system is therefore composed of one, two, or more (depending on installation type) filters with activated carbon, with one or more filters in absorption, while a filter is regenerated.
This regeneration is carried out for desorption of filters, bringing the carbon at the temperature of solvent total release and regeneration. It takes usually 2 hours to clean a filter.
The originality of our innovation is this: the desorption has no impact on the environment (as we are working in closed circuit) and has an incredibly low energy consumption, self-sufficient for most of the time.
In addition, for each regeneration cycle, the energy is released as heat. It can be used for different purposes, in production or for heating of premises used.
Performance
The plant is able to absorb effectively the different types of solvents.
The plant is able of regenerating the filter saturated, so as to ensure full re-use.
The longevity of the activated carbon depends on the factor of mechanical resistance to airflow and thus the length of work of the filters themselves.
The activated carbon and the filters used allow us to estimate, however, wisely, a useful life of 4 years.