Coanda effect induced lamellae cleaning system for wastewater and drinking water treatment clarifier

A method to dislodge sediment retained within a lumen of individual tubes from a tube settler assembly used for raw water clarification, said method comprising the steps of:

• providing a high pressure air power supply means;
• providing a number of first perforated pipes;
• releasing high pressure air from said high pressure air power supply means through said number of first perforated pipes beneath said tube settler assembly, to generate a first fluid flow from combined high pressure air and raw water;
• providing a smooth arcuate deflectors at a location between said tube settler assembly and said number of first perforated pipes and located in a pathway of said first fluid flow, said smooth arcuate deflectors of such size, shape and number as to generate turbulence of a Coanda-effect type of said first fluid flow;
• and
• driving said first fluid flow towards and through a bottom mouth of tubes lumen of the tube settler assembly and thereinto in such a way as to dislodge sediments trapped therein.

An apparatus to remove sediment retained within a lumen of tubes from a tube settler assembly in a water clarification process, said apparatus for use inside an enclosure formed inside a basin from a clarifier cell and spacedly over a flooring defined by the basin, said apparatus comprising:

• a tube settler assembly having a number of obliquely inclined elongated hollow settling tubes each defining a bottom mouth opening into an inner lumen;
• a number of transversely spaced first perforated pipes extending spacedly beneath said tube settler assembly;
• an air compressor member, operatively connected to said number of transversely spaced first perforated pipes;
• each of said number of transversely spaced first perforated pipes defining a peripheral and lengthwisely spaced air escape ports through which high pressure air from said air compressor member escapes, so that a first fluid flow from combined high pressure air and raw water is generated outside of said number of transversely spaced first perforated pipes;
• and
• a Coanda effect inducing means, mounted through a pathway of said first fluid flow between said number of transversely spaced first perforated pipes and said bottom mouth of the tube settler assembly and generating fluid flow turbulence improving sediment cleaning within said lumen of tubes of the tube settler assembly.