Paper belt filters

Paper belt filters

Paper belt filters remove often large quantities of dirt from process water or wastewater.

Examples include

machine shops, where drilling, milling and planing oils are initially filtered for reuse

horticulture and greenhouses, with wastewater or cleaning water containing large quantities of light and heavy dirt such as potting soil or sand.

How the paper belt filter works

With single-use filter paper

A paper roll feeds filter paper over the filtration surface; used paper is collected or rolled into the waste bin.

The advantage is that all liquid is filtered and only filter waste and used paper are discarded, with no residual liquid volume.

With filter cloth for continuous use

A rotating cloth spans the surface. Liquid flows through it and dirt remains on it. As it rotates, nozzles beneath the surface clean the cloth and wash dirt into the waste tank with cleaning liquid.

The advantage is that the cloth has a longer service life and is used continuously.
The disadvantage is a continuous waste stream containing dirt and cleaning liquid.

Automatic filtration

As the cloth clogs, the liquid level above it rises.

The level is measured; a high level signals the drive to advance the cloth.

The fresh cloth rapidly lowers the liquid level

and the cycle starts again. The paper belt filter provides fully automatic continuous filtration.

Applications

Horticulture, greenhouses and nurseries

Ebb-and-flow water filtration

Water recycling system

Water is distributed throughout the greenhouses and supplied to plants in an ebb-and-flow system. Excess water enters the drainage system and must be reused, rather than discharged into the sewer.

This water is filtered again to remove larger particles and keep the sprinkler system clear.

Paper belt filter models

Filtration for machining equipment

Grinding dust, drilling chips and planing shavings

Contamination in drilling and sawing oil can be continuously filtered with a paper belt filter.