Rieter

Dust filtering

Index

Usually two filter stages are used because a great deal of fly is carried along in the removal of dust by suction. The stages are preliminary filtering and fine filtering. These operations can be performed with individual filters or a central filter.

In new installations in new buildings a central filter (part of the air-conditioning plant) will probably be chosen; individual filters may have to be used in older premises for reasons of space availability and room height. The dust-laden air flows against a slowly rotating filter drum (Fig. 83, 1). A layer of dust and fly forms, is removed by rollers and falls into a carriage located beneath the drum. Before the air returns into the room, it is passed through the fine filter in the form of a filter drum (Fig. 83, 2).

Fig. 82 – Principle diagram of filtration

Fig. 83 – Flow diagram of waste removal plant

Fig. 84 – Panel pre-filter (LUWA)

Fig. 85 – Rotary fine filter (LUWA)