Belt press

Belt filter presses are used to remove water from treatment sludge and produce a non-liquid material referred to as “cake”. Dewatered residuals, or cake, vary in consistency from that of custard to moist soil.

A belt filter dewaters by applying pressure to the sludge to squeeze out the water. Sludge sandwiched between two tensioned porous belts are passed over and under rollers of various diameters. Increased pressure is created as the belt passes over rollers which decrease in diameter. Many designs of belt filtration processes are available, but all incorporate the following basic features: polymer conditioning zone, gravity drainage zones, low pressure squeezing zone, and high pressure squeezing zones.

The general mechanical components of a belt filter press include dewatering belts, rollers and bearings, belt tracking and tensioning system, controls and drives, and a belt washing system.

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