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How it works
Feed material is introduced into the centrifuge at point (A) where it is fed along a static feed pipe and then into a rotating feed pipe, which directs the feed into the feed bowl (B). Here it is accelerated to a circular motion and when it leaves, via the feed discharge ports, it is rotating at the same speed as the bowl. In these calm conditions the solids in the feed gravitate to the outside of the bowl and are transported by the scroll towards the conical end. This action takes place beneath the layer of liquid (or centrate).
The solids are conveyed out of the water via the conical section, from where they are discharged radially into the centrifuge housing and down into the cake chute (C). The liquid is prevented by flowing out with the solids by gravity. It flows around the scroll to the liquid outlet, over weir plates, finally discharging radially and falling down into the centrate chute (D). As you may expect in order to discharge the solids the scroll must turn slightly faster than the bowl. This extra speed is provided by a Rotary Hydraulic Motor or Rotodiff (E). This is called the differential speed and for most applications will be between 2 and 20 rpm faster than the bowl speed. The variables available on this machine are bowl speed, differential speed and pool depth. Also both sludge feed and polymer dosage rates can be varied. Polymer dosage points are available before the sludge feed pump and inside the centrifuge at the point of contact with the feed bowl. تقرير عن نظام تجفيف الحمأة (open in new window)
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