FL

Local filters with pulse purging system FL-6, FL-12, FL-15 are designed for air cleaning from dust. Local filters may be applied both for extension of the existing central aspiration installations and for self-installation on complex equipment based on point filters.


Install local filters to prevent emergency situations!

Local filters with pulse purging system FL-6, FL-12, FL-15 are designed for air cleaning from dust. Local filters may be applied both for extension of the existing central aspiration installations and for self-installation on complex equipment based on point filters. Recommended installation scheme in complex with grinding block BDA-3 (fig. 2).


Specifications

Characteristic

Unit

FL-6  

FL-12  

FL-15

Filter type

-

local with autonomous cleaning

local with autonomous cleaning

 

Capacity on air

m3/hour

2600..2800

3600…4850

 

Filter surface area

m2

6

12

 

Quantity of filter elements

pcs.

4

8

 

Form of filter elements

-

rectangular

rectangular

 

Weight

kg

260

560

 

Compressed air consumption, min.

l/min

120...130

260

Compressed air pressure, min.

bar

6…6,2

6…6,2

 

Inlet dust concentration

g/m3

max. 50

max. 50

 

Residual dust concentration

g/m3

max. 4

max. 4

 

Filter resistance ΔР

kPa

1,1…1,2

1,1…1,2

 

Shaking duration

Ms

80…100

80…100

 

Pair of elements shaking frequency

min

2…4

2…4

 

If there is a separate compressor for compressed air supply to the unit, air ducts system must be min. 10 m long to perform cooling function.


Structure and Functioning


Contaminated air is fed to the chamber of filters 1, which contains filter elements 2, where dust is settled on their external surface as air passes through the filter material (fig.2). At the same time dust creates so-called additional filter layer that is also important for filtration process. Purified air flows out of each element into the upper chamber 3, then through the valve 6 and exhaust fan flows out into the atmosphere.


At certain intervals programmed in the controller each pair of elements receives in turn a short-time injection of compressed air from the collector 6 through the corresponding injection tube 7, which has a number of small-diameter holes located opposite to outlet holes of elements. Diameter of these holes and distance from them to element are optimally calculated ensuring forced intake of the significant air amount inside with each injection of compressed air. This leads to powerful short-time change of air flow direction through the filter material, inflating the bag and effectively shaking off a dust layer, which falls back into the collector 5 and by the airlock 4 returns to the product flow. Also, before starting the regeneration process, fan is closed by throttle valve 8. Duration of cycles is chosen so, to ensure efficient filtration, prevent product sticking between cartridges and keep filter resistance within acceptable limits.


Cover 9 and doors 10 allow access to filter elements for their replacement or manual cleaning.