We have extensive experience in gaseous emission treatment, particularly in the installation of wet electrostatic filters, an advanced technology for removing organic and inorganic dust and mist. First, these systems use discharge and collection electrodes to generate a strong electric field. As a result, the corona effect ionises gas molecules and electrically charges the particles in the gas stream. Consequently, the charged particles are attracted to the collection electrode, where they are efficiently removed from the airflow, ensuring high-performance emission control.
Wet electrofiltration
Wet electrofiltration improves traditional electrostatic filtration by combining dust removal with a preliminary washing stage. As a result, both coarse particles and micronic or submicronic fractions responsible for visible smoke and opacity can be effectively removed.
Furthermore, the pre-washing section prevents fouling of the electrofiltration stage and improves overall system efficiency and reliability. In addition, recirculated washing water can be periodically purged or treated through dedicated chemical-physical processes to maintain optimal performance and environmental compliance.
Example of application of wet electrofiltration
The following examples highlight the effectiveness of wet electrofiltration in flue gas purification. When the high-voltage system is switched off, the untreated fumes contain high levels of particulate matter and oil mists (over 150 mg/Nm³), resulting in a visible plume that can be seen from long distances. In contrast, when the electrofilter is fully operational, the emissions are significantly reduced, leaving only minimal water vapour visible at the stack. As a result, particulate and oil mist concentrations can be reduced to around 5 mg/Nm³, with guaranteed performance levels below 10 mg/Nm³.
Characteristics
High abatement efficiency of oil mists, VOCs and solid particulate matter down to 0.1 μm: efficiency values close to 99% can be achieved
Limited maintenance operations (no mechanical moving parts, only periodic cleaning required)
Low energy consumption compared to other abatement technologies
Extremely low pressure drop
Limited fouling problems, both because there is pre-washing and because the collector tubes are large diameter and continuously cleaned by the liquid film of condensation; the system is therefore self-cleaning
Fields of application
Our plants can be complemented, if necessary, by coarser particulate abatement systems through the installation of cyclones, Venturi jets and sprinkler or plate scrubbers entirely designed and manufactured by Fidia Engineering. In addition, tube-electrode cooling systems can be installed, usually consisting of a plate heat exchanger and cooling tower.
- Textile sector: abatement of particulate and oily mists present in fumes from thermofixing stenter and various heat treatments
- Energy sector: reatment of flue gases from waste incineration and waste-to-energy plants (abatement of acid mists, heavy metals, silicates), from industrial low-fuel boilers (drying and combustion of grape marc and olive pomace, drying and combustion of wood residues in the production of pellets, production of energy and steam from renewable biomasses), from waste and biomass gasification plants, from coal production and processing plants
- Cement and lime industry: abatement of particulate matter contained in emissions from rotary kilns and grinding mills
- Wood and HD Fiberboard industry: abatement of wood dust and organic combustion products contained in fumes from wood biomass furnaces
- Steel and metallurgical sector: separation of metal dusts and acid mists contained in fumes from smelting and roasting furnaces for copper, zinc, pyrites, etc..
- Petrochemical sector (refineries): abatement of dusts, sulphuric mists, hydrocarbons
- Metal crushing sector: dust and hydrocarbon abatement
- Plastic foam and/or PVC or resin coating production sector
Pilot plant
We have the ELT C-012 wet (pilot) electrofilter with high efficiency in the abatement of submicron particles (organic and inorganic mists). Efficiency values close to 99% can be achieved. Volume flow rate of treated air (maximum): 2,000 Nm3/h (max. 130° C).
Manufactured by us entirely in AISI 304, complete with internal flushing section (rod desk tubes), gas distribution grid, flushing ramps, emission electrodes and 6” collection tubes, self-supporting, automatically programmable internal section flushing, high emission rigid electrodes, automatic V/I ratio adjustment and discharge optimisation, possibility of cooling with electrode tube liner, flushing of insulators, interlocking key safety system.
Here below some of works
Contact us to know complete reference list
69018
Wet electrofilters
The plant treats the gaseous emissions from the kilns for drying and combustion of grape marc (rich in dust, oily mists, VOCs). The aspirations from the ovens are fed into the lower section of the wet electrofilter, after treatment with dry cyclones and a washing tower. The system also significantly reduces olfactory nuisance.
Distillery Sector
57518
Wet electrofilters
The plant treats the gaseous emissions from the drying machines and thermo-fixing of the color on the fabrics (Rameuse) and from the printing machines (over 10 machines in total): the aspirations coming from the production department are fed into the lower section of the electrofilter. humid. This involves a pre-washing phase followed by an electrostatic collection section.
Textile industry
50012
Wet electrofilters
For the removal of oily mists, organic particulate VOCs and olfactory nuisances contained in the fumes coming from the grinding mills of metal scrap, the installation of the wet electrofilter has allowed the plant to treat the gaseous emissions coming from the furnaces for drying the olive pomace (rich in dust, oily mists, VOCs). The aspirations from the ovens are fed into the lower section of the wet electrofilter, after treatment with dry cyclones and a wet scrubber. The plant provides an optional chemical-physical treatment of the washing water. The system also significantly reduces olfactory nuisance
Sansificio sector
42310
Wet electrofilters
For the removal of oily mists, organic particulate VOC and nuisances For the removal of oil mists, organic particulate VOC and olfactory nuisances contained in the fumes coming from the grinding mills of metal scrap, the installation of the wet electrofilter has allowed to increase in significantly the dust abatement yields of the existing flue gas line, consisting of a dry cyclone separator, a Venturi jet and a wet scrubber. Thanks to the lower pre-wash section, a further reduction of the volatile organic compounds present in the effluent was achieved.
Mechanical field
Contacts
Registered office: Via Enrico Fermi 32 – 24020 Scanzorosciate (BG)
Operational headquarters, warehouse and workshop: Via A. Moro 1 – 24020 Scanzorosciate (BG)
Cap. Soc. € 600.000,00 i.v.
R.I. BG, Cod. Fisc. e P.I. 02887960165
Cod. Univoco SUBM70N
REA 331280
info@fidiaeng.it
(+39) 035 659 4550
