bbk 000000

UDC 628.16.067.3

Filatov A. I.

The analysis of washing rapid filters with different drainage types

Summary

The analysis of the process of washing rapid filters using head losses diagrams is presented. The diagrams of layer-by-layer head losses during washing allow determining and showing graphically the true capability of one or another drainage system to provide for uniform filter washing in area. The presence in the diagram of gaps in head loss values or even zones with a negative angular coefficient is a main evidence of the fact that the used drainage system cannot ensure uniform distribution of wash water in area. It is shown that uniform filter wash is possible on condition that the head loss diagram has a positive angular coefficient.

Key words

rapid filter , wash uniformity in area , head loss diagram , drainage layer , filtering media