SFL dust collectors are multipurpose, cost-effective, continuous-action modular units. The collectors automatically clean loaded with dust filters with the use of pulse regeneration with compressed air.
Flat corrugated cartridges are used as filter elements. The cartridges are placed horizontally in rows of 6 and 9, from 1 to 4 rows upwards.
Filtration surface area of one module ranges from 36 to 216 m2. This dust aspiration system is designed for continuous purification of air or gases from various types of dry and loose dusts with an input concentration up to 50 g/m3. Operation of SFL 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 also there are non-standard versions: antistatic, stainless steel, as well as explosion-proof (Ex).
For dust discharge, the standard range uses dust collection tanks (90-liter) equipped with manual shut-off flaps that allow to block the dust discharge point when the drum is removed while the dust collector is running.
Restrictions on the use of SFL
SFL dust collectors are not suitable for the following types of dust:
- smoldering and self-igniting dust;
- fibrous dust;
- sticky dusts;
- dusts with a moisture content of more than 5 %;
- cleaning air with temperatures above 80 °C.
Applications
- aspiration of manufacturing machinery and downstream equipment;
- aspiration of transfer points, conveying belts, conveyors, elevators;
- aspiration of crushers, mills, screens, coolers, mixers, batcher, etc.
- aspiration of thermal and mechanical metal cutting;
- aspiration of shot blasting and sand blasting.
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.
- Available in ATEX on special request
Design of SFL dust collectors
SFL dust collectors consist of a housing divided into a “dirty” chamber with horizontally arranged filter cartridges 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 cartridges are cleaned automatically when the set resistance is reached. The self-cleaning system shakes the filter cartridges with pulses of compressed air. The electronic control panel ensures fully automatic operation of the self-cleaning system.
For dust discharge, in the serial equipment line dust collection tanks (90-liter barrels) equipped with manual shut-off flaps. This allows to close the dust discharge point when the drum is removed while the dust collector is running.
Filter elements
The filter element for the SFL dust collector is a flat corrugated cartridge made of non-woven material. The dust collectors can be equipped with various additional options, which can be found in the “Delivery set” section.
| Cartridge | Filtration area, m2 | Filter element material |
|---|---|---|
| CART-D-SFL | Polyester | |
| CART-C-SFL | Antistatic polyester | |
| CART-T-SFL | Polyester with ePTFE membrane | |
| CART-TC-SFL | Antistatic polyester with ePTFE membrane |
Regeneration
As standard, cartridge regeneration in each collector section is performed simultaneously with the filtration process. Offline regeneration option allows to cut off each unit section from the draft inducer in turn and to regenerate the filter cartridges as efficiently as possible, because the air movement through the filter elements is stopped and light dust settles freely into the hopper.
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.
Possible arrangement of inlet/outlet flanges on SFN and SFL dust collectors
In the SFN and SFL series dust collectors, the inlet of contaminated gas and the outlet of purified gas are standardized from the top (picture below). Accordingly, the flanges are placed on the top of the dust collector. If necessary, the dirty gas inlet flange can be placed on the back wall of the filter unit in the upper part of the housing. The cleaned gas outlet can be placed on the side wall of the clean gas chamber.
The main difference between SFL and SFN
is that for the same filtering surface area the cartridge filter of the SFL series will have significantly smaller dimensions than the SFN pocket filter. However, SFN series filters are more versatile for different types of applications, SFL have limitations in operation – for SFL the maximum flow temperature should be no more than +80°C and the dust should be dry and non-sticky.
m2 | a rated load, m3/h | air flowrate, nm3/h | kg |
|||
| SFL-36/1 | 36 | 2 700 | 3 | 6 | 24 | 710 |
| SFL-36/2 | 72 | 5 400 | 6 | 12 | 24 | 1 160 |
| SFL-36/3 | 108 | 8 100 | 9 | 18 | 24 | 1 610 |
| SFL-36/4 | 144 | 10 800 | 12 | 24 | 24 | 2 070 |
| SFL-36/5 | 180 | 13 500 | 15 | 30 | 48 | 2 590 |
| SFL-54/1 | 54 | 4 050 | 5 | 9 | 41 | 860 |
| SFL-54/2 | 108 | 8 100 | 10 | 18 | 41 | 1 430 |
| SFL-54/3 | 162 | 12 150 | 15 | 27 | 82 | 2 050 |
| SFL-54/4 | 216 | 16 200 | 20 | 36 | 82 | 3 690 |
| SFL-54/5 | 270 | 20 250 | 25 | 45 | 123 | 3 320 |
| SFL-72/1 | 72 | 5 400 | 6 | 12 | 24 | 890 |
| SFL-72/2 | 144 | 10 800 | 12 | 24 | 24 | 1 550 |
| SFL-72/3 | 216 | 16 200 | 18 | 36 | 48 | 2 110 |
| SFL-72/4 | 288 | 21 600 | 24 | 48 | 48 | 2 780 |
| SFL-72/5 | 360 | 27 000 | 30 | 60 | 72 | 3 430 |
| SFL-108W/1 | 108 | 8 100 | 9 | 18 | 42 | 1 120 |
| SFL-108W/2 | 216 | 16 200 | 18 | 36 | 84 | 1 920 |
| SFL-108W/3 | 324 | 24 300 | 27 | 54 | 126 | 2 730 |
| SFL-108W/4 | 432 | 32 400 | 36 | 72 | 126 | 3 600 |
| SFL-108W/5 | 540 | 40 500 | 45 | 90 | 168 | 4 470 |
| SFL-108/1 | 108 | 8 100 | 6 | 18 | 24 | 1 080 |
| SFL-108/2 | 216 | 16 200 | 12 | 36 | 24 | 1 840 |
| SFL-108/3 | 324 | 24 300 | 18 | 54 | 48 | 2 600 |
| SFL-108/4 | 432 | 32 400 | 24 | 72 | 48 | 3 420 |
| SFL-108/4 | 540 | 40 500 | 30 | 90 | 72 | 4 220 |
| SFL-144/1 | 144 | 10 800 | 6 | 24 | 24 | 1 290 |
| SFL-144/2 | 288 | 21 600 | 12 | 48 | 24 | 2 210 |
| SFL-144/3 | 432 | 32 400 | 18 | 72 | 48 | 3 120 |
| SFL-144/4 | 576 | 43 200 | 24 | 96 | 48 | 4 090 |
| SFL-144/4 | 720 | 54 000 | 30 | 120 | 72 | 5 040 |
| SFL-162/1 | 162 | 12 150 | 9 | 27 | 43 | 1 370 |
| SFL-162/2 | 324 | 24 300 | 18 | 54 | 86 | 2 370 |
| SFL-162/3 | 486 | 36 450 | 27 | 81 | 129 | 3 420 |
| SFL-162/4 | 648 | 48 600 | 36 | 108 | 129 | 4 550 |
| SFL-162/5 | 810 | 60 750 | 45 | 135 | 172 | 5 620 |
| SFL-216/1 | 216 | 16 200 | 9 | 36 | 44 | 1 670 |
| SFL-216/2 | 432 | 32 400 | 18 | 72 | 88 | 2 960 |
| SFL-216/3 | 648 | 48 600 | 27 | 108 | 132 | 4 240 |
| SFL-216/4 | 864 | 64 800 | 36 | 144 | 132 | 5 620 |
| SFL-216/5 | 1 080 | 81 000 | 45 | 180 | 176 | 6 920 |
| SFL-360/1 | 360 | 27 000 | 15 | 60 | 68 | 2 560 |
Possible design
Spot (conveyor, silo) cartridge dust collector SFL-FH
SFL spot filters can be produced both in pressure version (without fan) – for ventilation of silos, bunkers, etc., which are under overpressure, and in discharge version (with fan) – for installation at transfer points and on silos where it is necessary to create discharge.
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 cartridges CART-D-SFL or CART-C-SFL | |
| Pyramid hooper (by number of sections) | |
| Supports | |
| 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 cartridges | |
| Heat-insulated housing | |
| Heat-insulated hopper | |
| Three-layer rust-preventing cover of the housing andd dust-collecting tank | |
| 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) — rotary encoder (for auger and rotary valve drives) — compressed air presure sensor |
| A housing-mounted fan | |
| Control and monitoring cabinet (according to additional technical specification) | |
• Chemical
• Metallurgical
• Metal working
• Mining
• Food
• Pharmaceutical
• Machine building
• Production of construction materials
• Cement production
• Other industries
Contacts
Arrisa Avenue, Unit #15, Office No. 303, 3rd Floor, Kolte Patil Downtown, Kharadi, Pune-411014, India