1. Type of technology
2. Contaminants which can be removed
All types of dust.
3. Emission limits possible
Such technology is able to handle dusts of particle size from medium to submicronic size, with collection efficiency exceeding 97%.
4. Description of the equipment and/or process
Cartridge filters may be used to replace the conventional woven fabric or needled felt filter bags in dust collection equipment under certain working conditions or where there is restricted space.
The star-shaped structure of the filter cartridges offers an ample filter surface.
Advantages: filter surface approx. 10 times greater than that of the filter bags with the same proportion: no wire cages, less holes, less solenoid valves, less fabricated metalwork (labour and material). Example: for a filter surface of 100 m2, 100 filter bags dia. 123 x 2500 mm. are Required, while just 10 filter cartridges are sufficient. The filter cartridges are designed and built for automatic cleaning through the reverse-jet system. Pressure of the cleaning air, from 5 to 7 bar, depends on the chemical-physical properties of the dusts to be handled. Cleaning times lie within 3/10 and 6/10 of a second with an interval from 1 to 25 minutes between the two cleaning cycles.
The pressure drop is approx. 100 mm. H2O for coarse dusts and 100 to 150 mm. H2O for fine dusts. The cartridges are made of a mixture of cellulose (paper), with layers of polyester and polypropylene, or nomex etc. depending on the nature of the material. Collection efficiency is 99%.
For heavy dust loads, the use of a precleaner is recommended.