Dust collectors are considered among the leading technology for particle separation and gas filtration in industrial processes. They achieve high efficiencies and can guarantee dust emissions below 5 mg/Nm3.
Dust collectors are static devices; the dusty gases are directed into the dirty zone of the filter, also known as the dirty air chamber, where the filter sleeves act as a barrier between the dirty and clean side. The gases pass through the filter fabric, exiting free of dust and particles through the clean air chamber, where they are channelled to a fan and chimney.
In order to be a fully automatic system, the sleeves with the filtered dust must be cleaned. At AIR JET, we work with dust collectors with Pulse Jet technology, which, as the name suggests, are air filters that incorporate the Pulse Jet cleaning system. This automated system uses pulses of compressed air to dislodge the dust from the air filter sleeves, causing it to fall to the bottom of the filter where it is discharged.
The most energy-efficient dust collectors are those equipped with the Pulse Jet cleaning system. The basic concept of this technology is to create an overpressure shock (pulse) inside the sleeve to cause it to swell and release the dust on its surface.
The cleaning system consists of compressed air manifolds (store pressurised air), membrane valves (control a controlled release of air), injector tubes (direct air to each of the hoses) and Venturis (maximise cleaning efficiency and help minimise energy consumption).
Finally, all this is controlled by the cleaning sequencer, which is responsible for creating the optimal cleaning sequence. These can range from very simple systems with sequential cleaning to intelligent systems that trigger cleaning according to the amount of dust retained in the sleeves (pressure drop cleaning).
The efficiency of dust filtration depends on the selection of the filter fabric, the quality of the fabrication and the tightness between the dirty and clean air chamber of the filter.
The choice of filter fabric is crucial and must be adapted to the specific process conditions, considering factors such as dust particle size, type of dust, temperature and gas humidity.
The manufacture of the sleeve also plays a key role in achieving high levels of efficiency and durability. Aspects such as the type of stitching or sealing, reinforced areas in the sleeve to prevent premature abrasion, and compatible support cages to prevent material fatigue failures are key factors.
Last but not least, the design of the sleeve attachment system on the filter is crucial, as poor design can allow dust to pass through. Our system, known as Snap-Ring, guarantees a perfect fit between the air filter sleeve and the filter plate, preventing unwanted dust leakage.
At AIR JET, we often say that no two filters installed are identical. This is because each process, product or customer is unique and requires a customised approach.
Depending on the application, process conditions and customer requirements, a wide range of filter designs are available. Each design is conceived for specific applications and special needs and answers questions such as dust concentration, dust density, dust properties (sticky, explosive, flammable…) among others.
AIR JET offers a wide range of solutions to control the emission of pollutants into the atmosphere in all types of industries.
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