Theoretical and experimental study of mud injection porous drainage in filters with floating loading

Victor Progulny,Igor Grachov

doi:10.31803/tg-20180410145724

Victor Progulny, Igor Grachov

Open Access

https://doi.org/10.31803/tg-20180410145724

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Abstract

The paper discusses up-flow filters with floating loading that intensify the process of filtering water for drinking purposes by improving filtering parameters and reducing power consumption. It is established that the problematic part of such filters are drainage systems. As a result of the analysis of drainage systems, it was found that the most promising material is porous polymer concrete. The proposed construction of drains is based on porous polymer concrete, which increases the reliability and durability of the filters with floating loading. The drainages based on porous polymer concrete, which intensify reliability and working life of filters, are offered. Mathematical model of the mud injection process of lower polymer concrete drainage with suspended matters, kept in damp water is designed. Experimental studies have shown the validity of the obtained model.

Highlights

Water filtration through grain loadings is the most popular way of getting necessary water quality
The fast filters with floating loadings, which have a number of advantages in contrast to filters with sand loadings, have been spread due to the possibility of the reception of necessary quality water under the worst qualitative features of source water, absence of the capacities and pump for keeping and presenting of washing water, smaller number of utility systems and valves and pumping
The main advantage of such filters is that washing is produced by clean water from upper loading space

Summary

INTRODUCTION

Water filtration through grain loadings is the most popular way of getting necessary water quality. The thickness of upper and lower drainage porous polymer concrete layer is not more than 60 mm, and aggregate fineness is 3-5 mm General scheme of such filter is given in Fig. 1.At filtration, the source water is supplied to a lower drainagedistributing system 2, where it is distributed on the filter uniformly, gets through expanded polystyrene loading 1 and accumulates in the upper loading space, where it is drained off on pipe line 5 beyond the filter. Figure1The Scheme of the filter with floating loading with rising flow: 1 - floating loading; 2 - lower drainage system from porous polymer concrete of tray-type; 3 - upper drainage system from porous polymer concrete; 4 - supply of source water; 5 – product water bleed-off; 6 – bleed-off of wash water; 7 – supporting structures.

MATHEMATICAL MODELS OF THE DRAINAGE MUD INJECTION PROCESS WITH SUSPENSION

CONCLUSION