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Filtration, Back-Wash

 

Dry & fine particle filtration with an automatically regenerable filter !

 

 

 

Content

1. Process description

2. Models

2.1. Filtrax F - bag filter

2.2. Filtrax P - pleated membrane

3. Applications

 

1. Process description 

Backwash filters are dedicated to fine & dry dust filtration. In a backwash filter, the filter housing is divided in various compartments, each containing the same amount of bag or cartridge filters.

 

 

 

 

 

 

 

 

When a compartment is in “filtration mode”, the emission flows from the outside to the inside of the bag, building a particle cake on its surface.

 

 

 

 

 

 
 
When a compartment is in ‘cleaning mode”, pressurized air is injected from the inside to the outside of the bag. The particle cake is expelled from the bag, falls at the bottom of the housing and is automatically evacuated

Only non sticky particles can be filtered with a backwash filter

2. Models 

 

2.1. Filtrax F - bag filter 

 

 

Bag filters are recommended for particles sizes > 10µm. Smaller particles may clog too quickly the filter surface, which requires too many backwash pulses.

 

 

We propose systems with flat bag filters in order to reduce the size of the housing of 40 to 50%; they have the advantage to be horizontally mounted, which facilitates their removal

 

2.2 Filtrax P - pleated membrane 

 

 

Cartridge pleated filters are recommended for particle sizes < 10µm. They accumulate the fine dust at the bottom of each pleat, letting the its edges clean.

 

 

If the particle cake is sticky, the bags are not properly cleaned and the pressure drop also increases. In this case, an electrofilter is preferred

 

3. Applications 

Any fine dry and non sticky particles, like metal dust, powder,…

 

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