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SuperBlower-filter Side-inlet

SuperBlower-filter Side-inlet. Report by K. Häll & J. Mahler. Cell-plate. Bag. Transition. Inlet chamber. Coanda-plate. Dividing panels. Conical hopper. Screw conveyor. Conditions for test filter:. Filter conditions prior to test:. Test set-up as seen from inside filter.

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SuperBlower-filter Side-inlet

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  1. SuperBlower-filter Side-inlet Report by K. Häll & J. Mahler

  2. Cell-plate. Bag. Transition. Inlet chamber. Coanda-plate. Dividing panels. Conical hopper. Screw conveyor.

  3. Conditions for test filter:

  4. Filter conditions prior to test: • Test set-up as seen from inside filter.

  5. Test results:

  6. This graph shows velocity [m/sec] curves and a simple animation of some dust movement.

  7. This graph shows average Air volume [m3/h] curves. Q x 1000

  8. This graph shows average pressure [Pascal]curves.

  9. Observations in the filter during operation: • The very low level of dust circulating in the filter does not reach the cell plate but holds a position of approximately 2 [m] before it. This can also be seen in the photographs of the inside of the hopper. • The level of dust does not go above the hopper. In other words, the preseparation taking place in the filter’s coanda area reduces the dust load on the bags. This means that the life time of the filter media increases, leading to smaller service expenditures. • Compared to similar filters, the pressure drop over the examined filter is noticeably lower (See graph later). • This means that the main fan uses less energy moving the air volume through the filter. This of course lowers the energy costs on this fan.

  10. Note the quantity of dust on the filter bags near the dividing panel. The filter bags in this filter had not been cleaned in 7 weeks when this photo was taken. Note that in the photograph to the right, there is only dust in the conical hopper itself.

  11. Standard SBF-filter in polen versus the new side-inlet for SBF-filter : Ref. filter Side inlet

  12. Patent ! • JKF has patented the side inlet with Coanda plates.

  13. Functional description of side inlet chamber with Coanda-plates:

  14. Construction of side inlet chamber: • Inlet piece (transition) mounted to side inlet chamber opening • The velocity of the airflow entering the side inlet chamber is reduced. • Upper section of side inlet chamber • The dynamic pressure increases immediately after passing the inlet • opening but decreases quickly as the airflow reaches the middle of the upper section of the inlet chamber. • The airflow is directed downward • into the inlet chamber where it • encounters the Coanda plates.

  15. Lower section of side inlet chamber: • Lower section of side inlet chamber, which contains the Coanda plates The airflow meets the top of the Coanda plates, pressure and velocity increases. • The airflow comes in contact with the Coanda plates and the airflow • sticks to its surface. Because of their velocity and inertia, the dust particles in the airflow cannot follow the air • (Preseparation). • The pressure and velocity of the • airflow decreases drastically when • passing through the lower section of • the side inlet chamber, before entering • the conical hopper.

  16. Flow sketch :

  17. Conical hopper: As the airflow entering the conical hopper Has a very low velocity and dynamic pressure, it expands equally to each side of the hopper section. It does so by creating a rotating turbulence which still carries the fine dust. When this turbulence breaks down, transported dust leaves the airflow and falls down into the hopper. This forms the second preseparation eliminating the finer dust from the initial air volume. A side effect of this second preseparation is the observed, very even distribution of dust in the hopper. And therefore the dust has the best settle down conditions in the Patented side inlet for the SuperBlower-filter.

  18. Conclusion Compared to a conventional filter design, the Super Blower Filter with side inlet offers many advantages to the user of the dust control plant: • The filter is indifferent to the dust volume blown into the filter. It handles evenly well small fine dust quantities as big coarse materials. • Optimum dust settlement conditions in the hopper leads to efficient and regular dust outlet, thus avoiding that the system blocks. • Due to the very accurate and equal dust distribution in the bag compartment and in the hopper, the dust load on each bag is reduced to a minimum. This results in the longest lifetime of the filter media, and less service costs. • The low pressure drop over the total filter installation allows for minimum fan costs. Our test results show that 10% energy savings are reached. • Reduced noise level is a result of the innovative and integrated construction of the filter inlet. • The design flexibility of the Super Blower Filter with the new side inlet allows for an easier and more individualized plant solution at your factory. If you want a state of the art plant solution, take the JKF way!!

  19. Questions ? Report by K. Häll & J. Mahler

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