SFN dust collectors are perfect for various industrial aspiration processes. These are cost-effective, continuous-action modular units with pocket-style filters. The collectors automatically clean loaded with dust filters with the use of pulse regeneration with compressed air.
The area of filtering surface of one module is from 18 to 126 m2. Filter pockets are placed horizontally in one such section, 12 pieces in a row, from 1 to 7 rows upwards. The modular design allows to achieve the required capacity by selecting the size and number of sections.
The dust aspiration system is designed for continuous cleaning of air or gases from various types of dry, loose dusts, as well as from fibrous and weakly adherent dusts with an inlet concentration up to 50 g/m3. Operation of SFN collectors is possible both indoors (standard version) and outdoors (outdoor version).
The dust collectors are manufactured both in stationary version (with supports and hopper) and in hopper version (for installation on silos and transfer points), and there are also non-standard versions – antistatic, high-temperature, chemical-resistant, stainless steel, as well as explosion-proof (Ex).
For dust discharge, the standard range uses dust collection tanks (90-liter drums) equipped with manual shut-off flaps that allow the dust discharge point to be shut off when the drum is removed while the dust collector is running.
Applications
• Aspiration of furnaces, cast houses
• Aspiration of silo and bunker loading/unloading
• Aspiration of process and associated equipment
• Aspiration of pouring sites, conveyor belts, conveyors, and elevators
• Aspiration of crushers, mills, screens, refrigerators, mixers, and dispensers
• Aspiration of thermal and mechanical metal cutting
• Aspiration of shot blasting and surface treatment
• Aspiration of welding processes
Limitations
• Filters have no structural protection against explosion.
• In case of sparking application additional spark protection measures are required.
• Not designed for the temperature of flow to be cleaned above 80 °С.
Features & Benefits
-
Wide model range
A variety of possible configurations of SFN dust collectors allows to choose a unit with capacity from 1 000 to 150 000 m3/h and to work with inlet dust concentrations in the air up to 50 g/m3 and flow temperature up to +260 °C. -
High level of purification
Residual dust content of 5-10 mg/m3 and less with the use of special filter materials and advanced regeneration system. -
Simple, convenient and safe maintenance of SFN dust collector with horizontal access to the “clean” area of the unit:
– allows to make a compact dust collector and use it in rooms with restrictions on length, width and height;
– is ergonomic because it reduces the load on the human spine during the process of changing filter elements, since almost all the weight of the filter element is on the panel of the “clean” area;
– allows to change necessary filter elements without removal of others, staying in the clean area. -
Easily accessible high-efficiency regeneration system
Control unit, receiver, solenoid valves are located at the bottom of the collector housing at human height for quick checkup, maintenance and visual inspection by operating services. -
Easy assembly and mounting
The dust collector is supplied as a fully assembled unit or as an assembly of modules (housing, hopper with supports, regeneration system), which simplifies on-site installation in limited dimensions and significantly reduces commissioning time. - Possibility to increase the performance of the dust collector by partial upgrading of the construction elements of the already installed collector.
-
High-quality paint coat of the unit
To protect the collector housing from external influences, there is an option to make special sandblasting of the metal surface and further three-layer coating with paints of the Finnish manufacturer Tikkurila. - Two-stage filtration with additional module (option)
- Dust collector cleaning system with compressed air.
Design of SFN dust collectors
SFN dust collectors consist of a housing divided into a “dirty” chamber with horizontally arranged filter-pockets and a “clean” chamber, a pyramidal hopper, a pneumatic regeneration system, supports and a dust collection tank with a manual shut-off gate valve.
The filter-pockets are cleaned automatically when the set resistance is reached. The self-cleaning system shakes the filter pockets with pulses of compressed air. An electronic control panel ensures fully automatic operation of the self-cleaning system.
In the serial equipment line for dust discharge, dust collection tanks (90 liters barrels) are used. They are equipped with manual shut-off flaps, which allows to close the dust discharge point during the removal of the barrel while the dust collector is running.
Dust collectors can be equipped with various additional options, which can be found in the “Delivery set” section.
Operating principles
Contaminated air enters the dust collector through the inlet pipe under the effect of vacuum created by the fan. Inside the collector, the air flow is evenly distributed over the entire cleaning chamber and passes through filter-pockets placed inside the chamber. Dust particles are settled on the filter-pockets’ surface. The purified air coming from the inside of the pockets passes through the purified gas chamber and exits through the outlet pipe.
The filter-pockets are cleaned automatically when the set resistance is reached. The pneumatic regeneration system creates a pulse of compressed air that blows out the pockets without stopping the dust collector. The compressed air pulse comes from the receiver, passes through the pneumatic solenoid valves and is ejected into the inner part of filter-pockets, resulting in their purification.
After blowing dust particles settle in the hopper and are further discharged from the filter through the dust discharge flange. Dust settles in the dust-collecting barrel. For its removal it is necessary to close the gate valve, disconnect the barrel by means of latches, after emptying it, put it back and open the gate valve.
Regeneration
SFN are self-cleaning continuous-action dust collectors with pulse regeneration with compressed air. As standard, regeneration of the pockets in each collector section is performed simultaneously with the filtration process.
An offline regeneration option is available, which allows each collector section to be alternately disconnected from the draft inducer and the filter-pockets to be regenerated as efficiently as possible, since the air movement through the filter elements is stopped and light dust settles freely into the hopper.
The compressed air supply for the regeneration system on 1-, 2- and 3-section dust collectors is carried out from one side (left side as standard), on 4-section collectors and more it is carried out from both sides simultaneously (left and right side).
| Dust collector model | ||||||
| Filtration area, m2 | Capacity at a rated load, m3/h | Number of pulse valves, pcs. | Number of pockets, pcs. | Compressed air flowrate nm3/h | Weight, Kg |
|
| SFN-18/1 | 18 | 1 750 | 12 | 12 | 9 | 1 000 |
| SFN-18/2 | 36 | 3 500 | 24 | 24 | 18 | 1 650 |
| SFN-18/3 | 54 | 5 250 | 36 | 36 | 27 | 2 330 |
| SFN-18/4 | 72 | 7 000 | 48 | 48 | 36 | 3 200 |
| SFN-18/5 | 90 | 8 750 | 60 | 60 | 45 | 3 850 |
| SFN-36/1 | 36 | 3 500 | 12 | 24 | 12 | 1 210 |
| SFN-36/2 | 72 | 7 000 | 24 | 48 | 24 | 2 080 |
| SFN-36/3 | 108 | 10 500 | 36 | 72 | 36 | 2 960 |
| SFN-36/4 | 144 | 14 000 | 48 | 96 | 48 | 4 180 |
| SFN-36/5 | 180 | 17 500 | 60 | 120 | 60 | 5040 |
| SFN-54/1 | 54 | 5 200 | 12 | 36 | 14 | 1 490 |
| SFN-54/2 | 108 | 10 400 | 24 | 72 | 28 | 2 560 |
| SFN-54/3 | 162 | 15 600 | 36 | 108 | 42 | 3 710 |
| SFN-54/4 | 216 | 21 800 | 48 | 144 | 56 | 5 000 |
| SFN-54/5 | 270 | 27 000 | 60 | 180 | 70 | 6 070 |
| SFN-72/1 | 72 | 7 000 | 12 | 48 | 16 | 1 710 |
| SFN-72/2 | 144 | 14 000 | 24 | 96 | 32 | 3 020 |
| SFN-72/3 | 216 | 21 000 | 36 | 144 | 48 | 4 280 |
| SFN-72/4 | 288 | 28 000 | 48 | 192 | 64 | 5 780 |
| SFN-72/5 | 360 | 35 000 | 60 | 240 | 80 | 7 020 |
| SFN-90/1 | 90 | 8 650 | 12 | 60 | 18 | 1 970 |
| SFN-90/2 | 180 | 17 300 | 24 | 120 | 36 | 3 510 |
| SFN-90/3 | 270 | 25 590 | 36 | 180 | 54 | 5 030 |
| SFN-126/4 | 504 | 48 000 | 48 | 7 | 72 | 7,810 |
| SFN-90/4 | 360 | 34 600 | 48 | 240 | 72 | 6 980 |
| SFN-90/5 | 450 | 43 250 | 60 | 300 | 90 | 8 510 |
| SFN-108/1 | 108 | 10 500 | 12 | 72 | 22 | 2 190 |
| SFN-108/2 | 216 | 21 000 | 24 | 144 | 44 | 3 910 |
| SFN-108/3 | 324 | 31 500 | 36 | 216 | 66 | 5 620 |
| SFN-108/4 | 432 | 42 000 | 48 | 288 | 88 | 7 740 |
| SFN-108/5 | 540 | 52 500 | 60 | 360 | 110 | 9 440 |
| SFN-126/1 | 126 | 12 000 | 12 | 84 | 25 | 2 480 |
| SFN-126/2 | 252 | 24 000 | 24 | 168 | 50 | 4 400 |
| SFN-126/3 | 378 | 36 000 | 36 | 252 | 75 | 6 380 |
| SFN-126/4 | 504 | 48 000 | 48 | 336 | 100 | 8 560 |
| SFN-126/5 | 630 | 60 000 | 60 | 420 | 125 | 10 480 |
Filter elements
| Filter elements | |
|---|---|
 | Represents a smooth pocket made of non-woven needle-punched material (like a felt), put on a metal lattice frame. The frame is equipped with an inlet confuser. |
| Name | Filter area, m2 | Pocket-filter material |
|---|---|---|
| PF-D-1,5-SFN | Polyester fiber | |
| PF-C-1,5-SFN | Polyester fiber antistatic | |
| PF-H-1,5-SFN | Hydrophobic polyester fiber | |
| PF-HС-1,5-SFN | Hydrophobic polyester fiber antistatic | |
| PF-A-1,5-SFN | Aramid (heat-resistant) | |
| PF-AС-1,5-SFN | Aramid antistatic (heat-resistant) | |
| PF-eT-1,5-SFN | Polyester fiber with teflon membrane ePTFE | |
| PF-eTC-1,5-SFN | Polyester fiber with teflon membrane ePTFE antistatic | |
| PF-T-1,5-SFN | Teflon | |
| PF-TC-1,5-SFN | Teflon antistatic | |
| PF-DT-1,5-SFN | Polyacrylonitrile | |
| PF-DTC-1,5-SFN | Polyacrylonitrile antistatic | |
| PF-PI-1,5-SFN | Polyimide | |
| PF-PIC-1,5-SFN | Polyimide antistatic | |
| PF-PPS-1,5-SFN | Polyphenylene sulfide | |
| PF-PPSC-1,5-SFN | Polyphenylene sulfide antistatic |
*Non standard item.
IMPORTANT NOTICE: Different models of SFN Filter unit and its spare filter elements and accessories are available on special request. Please contact us or our authorized representative.
• Chemical
• Metallurgical
• Metal working
• Mining
• Food
• Pharmaceutical
• Machine building
• Production of construction materials
• Cement production
• Other industries
Delivery set
| Standard delivery set | |
|---|---|
| Dust collector housing (dirty and clean chambers) | |
| Gas inlet/outlet flanges on top (standard) | |
| Purge system (as a set) | — compressed air receiver — purge pipes — impulse valves — control unit (CONT-S) — oil-water separator with reducer |
| Service doors | |
| Access manhole on the back wall (by number of sections) | |
| Filter-pockets PF-D-1,5-SFN or PF-C-1,5-SFN | |
| Dust collector housing (painted) | |
| Pyramid hooper (by number of sections) | |
| Supporting structures | |
| Manual shut off flip gate (by number of sections) | |
| Dust-collecting 90-liter tank on wheels (by number of sections) | |
| Ground line (for antistatic design) | |
| Powder coating | |
| Extra | |
|---|---|
| Heated purge system included: | insulated box (by number of sections) - heating with thermostat (by number of sections) |
| Specific filter-pockets | |
| Differential pressure sensor | |
| Dust collector frames made of galvanized/rust steel | |
| Heat-insulated housing | |
| Heat-insulated hopper | |
| Offline regeneration | |
| Hopper heating | |
| Connected hopper | |
| Alternative dust discharge devices: | — rotary valve (sluice feeder) — double pendulum flap (flasher) — screw conveyor (for combined dust collector) |
| Sensors: | — dust level sensor in the hopper and in the dust-collecting tank — rotary encoder (for auger and rotary valve drives) — compressed air presure sensor |
| Offline-regeneration system with a set of shut-off valves | |
| A housing-mounted fan | |
| Control and monitoring cabinet (according to additional technical specification) | |
Contacts
Arrisa Avenue, Unit #15, Office No. 303, 3rd Floor, Kolte Patil Downtown, Kharadi, Pune-411014, India