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Bottom Discharge Centrifuge




The process of Filtration is similar to other types of centrifuges, the difference being in the method of unloading the Solids. The Scraper cuts the Solid cake while the basket is rotating at a slow speed. The solids are discharged through openings provided in the Basket bottom and Bottom Base / Inertia Plate.

Details :

  • FEEDING : A filter media is fixed to the cylindrical surface of a perforated basket. The feed slurry is directed to the basket wall using a feed pipe. Feeding is carried out while the basket is rotating at an appropriate speed. After the required cake is built, feeding is stopped. The centrifuge is run for some time to partially de-water the solids. Feeding can be repeated if there is adequate space for further build up of cake.
  • WASHING : After feeding, washing is carried out by pumping wash liquid through the wash pipe.
  • SPINNING : The basket is run at the spinning speed to complete the de-watering process.
  • SCRAPING : The speed of the basket is reduced to the scraping speed (slow speed). A scraper knife cuts the solids, discharging them through the chute.
  • HEEL REMOVAL - OPTIONAL : Some material remains on the filter media after scraping and is called residual heel. This heel can be removed by using the heel removal system.
  • CLEANING IN PLACE - OPTIONAL : The centrifuge can be cleaned using a CIP system.
  • LARGE CENTRAL OPENING Solid Discharge Openings : The ( Basket LCO ) picture shows openings in the basket. The picture below ( Bottom Base LCO ) shows the openings in the Bottom Trough. The large openings facilitates smooth flow of solids as compared to single kidney shaped side opening . Slide in Isolated Bearing Housing
  • Design : The bearing housing is completely isolated from the solvent vapours or mother liquor, preventing the chances of corrosion of bearings. This design eliminates the need to access below the Inertia Plate / Bottom trough (difficult in a Bottom discharge with large central opening) for dismantling the Bearing Housing. Also, the bearing housing can be removed easily without dismantling connections like grease pipe and Nitrogen Blanketing.


Specification

Model Unit 36 36D 48 48D 60 60D
Basket Diameter mm. 915 915 1220 1220 1524 1524
Basket Depth mm. 450 600 500 650 500 750
Working Capacity under Lip lts. 160 220 300 400 500 750
Basket Load (Max) kgs. 200 275 375 500 625 930
Max. Basket Revolutions rpm. 1100 1100 1000 1000 900 850
Centrifugal Force G. 619 619 682 682 691 616
Filtration Area sq.mts. 1.29 1.72 1.91 2.49 2.39 3.59
Motor Power kW. 7.5 7.5 15 18.5 18.5 22
Overall Dimension of Machine
Length over Motor mm. 1780 1780 2150 2150 2500 2500
Width mm. 1220 1220 1600 1600 2000 2000
Operating Height mm. 1500 1700 2325 2500 2250 2500
Weight of machine with Motor kgs. 3000 3100 4500 4750 7000 7500