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Startseite Market Segments & Applications Factory Equipment Air Filtration Flue gas filtration – use of conical dust filter cartridges

Conical dust filter cartridges for flue gas filtration

Filtration Group Industrial’s customer is a manufacturer of pellet heating systems. The product range extends from small heating systems for private households to municipal combined heat and power plants. Due to increasing demands on the emission quality of such heating systems, our customer was looking for an efficient and reliable solution to remove pollutants from flue gases, with the aim of further reducing environmental pollution. So far, our customer has been using electrostatic precipitators in the series. These electrostatic precipitators remove particles using the electrostatic principle. The customer is looking for a more compact as well as cheaper alternative to the currently used electrostatic precipitators.

Challenge

The retention rate of an electrostatic filter is challenged by contaminative fine dust in the range smaller one micrometer. After a long-time operation, the filter media is blocked and the differential pressure of the dust filter cartridge increases. Customer uses star-pleated filter cartridges type 852 054 DRG 50 V4A SO with a DRG 50 wire mesh material as support . Cleaning by multi-jet nozzle MJD-16.

Technical data

Volume flow: 900 m³/h
Filter cartridges: in conical design, filter material DRG 50 wire mesh filter surface: 1,7 m², diameter 165 mm, connection RD 100, length: 1.000 mm , inner tubes and end caps in V4A
Kind of dust: dry, fine, strong and agglomerated , dust powder density = 0,25 g/cm³
Temperature: exit flue temperature 120 – 200 °C with uncleaned tank, target: approx. 150 – 160 °C

Solution statement

Filtration Group recommends for this application conical dust filter cartridges. For stabilization of the pleats, the dust filter cartridges have been equipped with a coil spring.
The cleaning pressure of this application comes up to approx. 6 bar.
Glued with K201 (high-temperature resistant ceramic adhesive).
For fuse of the bottom end cap, the inner tube was fixed with a metal sheet including a hole.
Thanks to the conical design of the dust filter cartridges, the distance between the cartridges on dirt side, comes up to 240 mm each , based on the middle. Distance from the middle of the cartridge up to the filter housing comes up to 120 mm each.

Customer value

Compact design due to the possibility of small distances between the cartridges
Effective cleaning by constant upstream velocity and reduced inside capacity (operation of multi-jet nozzle MJD)
Cost-efficient by smaller compact filter housings
Higher filtration efficiency (dust content on clean side

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