Q-Filter® is used for the filtration of aqueous fluids and uses filter cloth from a roll, in combination with vacuum, to remove particles from aqueous media. As the dirt builds up on the filter cloth, the vacuum in the clean tank is increased to continu filtration. When the vacuum reaches the maximum, the filter cloth is indexed to make some new filter cloth available for filtration.
Q-Filter® creates an underpressure of up to -200 mbar and continuously increases and decreases the vacuum, in response to the process conditions, for optimal performance. The system automatically adjusts to fluctuations in the amount of fluid coming, the nature and amount of dirt in the fluid and the fliter cake build up on the filter cloth.
- The two chambers, A (dirty chamber) and B (clean chamber), positioned above each other, are separated by the filter cloth (2) which is supported by the sieve plate (1).
- Polluted medium flows through the inlet (3) into chamber A and through the filter cloth into chamber B, where pump (4) pumps off the clean fluid.
- Dirt accumulates on the filter cloth and forms a cake, which causes the resistance to increase and the level in A to rise. If a previously set level is reached, vacuum pump (5) kicks in and creates under pressure in chamber B, causing the medium to be sucked through the cloth and preventing the level in A to rise any further.
- As the filter cake on the cloth grows and the resistance increases, the under pressure in chamber B is further increased until a set maximum, at which point the cloth is forwarded over a short distance by turning wheels (6).
- Used cloth (7) comes out at the right while fresh cloth is pulled from roll (8), into the device. Than the cycle starts over again.