Just place a pretreated sludge cake between the Crown Press' pair of
filtration belts, use the hand lever to apply the tension force, and the
belts and sludge cake are drawn around a static, curved crown that exerts
the same kind of pressure you get with the rollers in a working press. You
can then collect the filtrate and record the volume as a function of
pressure exerted.
The unique design of the Crown Press means you can simulate the action of
full-scale presses more accurately than other laboratory presses allow. For
instance, only the Crown Press permits free water motion across both the top
and bottom belt faces. And by exerting its tension pressure over a curved
crown the Crown Press opens micro-fissures in the sludge cake, shearing it
just as the large presses do. You also get a simulation of the presses'
capillary action: when the Crown Press bends the belt, the fabric opens
capillary channels, allowing the filtrate to flow away freely from the
sludge.
Since the Crown Press' tension forces are measured in pounds, you merely
have to divide the result by the belt width to arrive at a value for the
force on the sludge expressed in pounds per inch - the unit of measure
ordinarily used in the adjustment of belt tension. And just as on a
full-scale press, tension to the Crown Press' belt can be applied in a timed
sequence.
You can even measure sludge migration - because the sludge is free to
migrate at the outer edges, coming into contact with open belt material.
This isn't possible with other lab presses.
Compact and portable, the Crown Press can be easily moved from site to site,
and allows easy exchange of belt types.
Weight: 30lbs, Dimensions: 11"W x 12.75"D x 14.5"H |
