Factory Equipment Air filtration

FG dedusting unit in pressure-shock resistant design with explosion suppression

Filtration Group Industrial’s customer is a family-owned company that successfully develops, produces and sells adhesives and sealants for the metal packaging industry. During adhesive production, resin dusts are ground in a crusher. This process produces sticky dusts with a minimum ignition energy of < 3 mJ, which must be extracted. For dusts with such a low ignition energy, dust extractors with constructive explosion protection are usually used. The resin dusts generated at the weighing and manual workplaces in production are extracted by the Filtration Group Industrial dust extractor SFR-09 008 DN-150 S1S SL.

Challenge

Dust removal filter in explosion-proof design with explosion release for inside installation. Application with an constructive explosion protection by using a relieve valve in order to provide the explosion decoupling for the dust removal filter without endangering the environment. Removal of sticky dusts. Compact and space-saving design has been required.

Technical Data

  • Volume flow: approx. 6.000 m³/h
  • Kind of dust: colophony: dry, free-flowing, flammable and difficulty soluable in water for a minimum ignition energy
  • Operating temperature: max. 40 °C
  • Residual dust content:
  • Cleaning by Filtration Group rotating wing (RLK)
  • Dust filter cartridges: 9 x 852 032 Ti 08-12
  • Filter material: Ti 08, electrically conductive polyester fleece with a total filter area of 108 m².
  • Installation of the filter in zone 22
  • Resin dust, free-flowing with the use of filter aid

Solution statement

  • Filtration Group Industrial has chosen a pressure shock resistant dust collector with explosion suppression for this application.
  • At the start of an explosion, the pressure increase is recorded by two separate pressure sensors and the extinguishing agent bottles are activated by the high-speed electronics
  • Inside the dust removal filter, the flame is suppressed by the extinguishing agent, so that the explosion pressure will be reduced. At the same time, the signal from the switch box disconnects all electrical components.
  • Effective and gentle cleaning of the filter elements and protection of the filter material against sticking due to the use of filter aid HI 26, which is supplied via the Filtration Group dosing device SDG-100

Customer value

  • Dedusting plant with constructive explosion protection can be installed in the hall. In comparison to a pressure shock resistant dedusting device with bursting disc discharge, no further measures need to be taken for the safety of the employees and the environment.
  • Longer element service life due to the use of filter aids HI 26
  • Cost-effective solution of explosion decoupling in comparison to existing systems
  • Optimum flow conditions in the filter chamber due to the use of conical filter elements

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