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Dr Denzil Rodrigues Technical Manager, Hydropath Holdings Ltd.

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Presentation on theme: "Dr Denzil Rodrigues Technical Manager, Hydropath Holdings Ltd."— Presentation transcript:

1

2 Dr Denzil Rodrigues Technical Manager, Hydropath Holdings Ltd.

3 Electronics

4 Electric current travels along whole pipe The Hydropath signal is a decaying sine oscillation – Around 120 kHz – (2000 times faster than mains!) Pulse separation time varies to work in a range of situations Extremely low power – (Less than 20W)

5 Electronics Patented How do we get a signal into the pipe? Transformer AC current in primary circuit Magnetic field through ferrite AC current in secondary circuit Make secondary single loop Make loop bigger...

6 Electronics Alignment of pipe Position of pipe through unit Topology (knot theory)

7 Electronics = =

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9 Electronics: Comparison with Magnetic Magnet Wirewrap (electromagnet) Magnetic fields (not Electric Fields) – Very weak ( E = c B ) – Depends on flow rate (no flow, no protection) – Local (point protection only)

10 Electronics Signal Propagates over long distances AC signal allows current to flow in “open circuit” Faraday cage effect does not apply

11 Limescale

12 Calcium and bicarbonate dissolved in water Water becomes super-saturated when: Temperature increases or pressure decreases Ions precipitate as calcium carbonate: limescale Ca Calcium (HCO 3 ) 2 Bicarbonate CaCO 3 Calcium Carbonate CO 2 Carbon Dioxide H2OH2OH2OH2O H 2 O Water

13 Limescale

14 Seed Crystals Crystals need a start point to form (a nucleation site) Crystals prefer to form on existing crystals No existing crystal: crystals form all along string Existing crystal: will grow rather than form new crystals

15 Prevention of scale

16 Dissolving existing scale H2OH2OH2OH2O Ca + (HCO 3 ) 2 CaCO 3 + CO 2 + H 2 O Crystals form Creates Carbon Dioxide Dissolves existing scale To dissolve scale, Hydropath requires Hard Water Feed

17 Before After Dissolving existing scale

18 Before After eight months Dissolving existing scale Before – AFTER CLEANING! After one month Plate exchanger

19 Flocculation

20 Filters can only remove “big” particles Particles penetrate into filter material and cause clogging Stick particles together “flocculate” Enhance filtration Reduce backwashing by a factor of five Without Hydropath With Hydropath

21 Flocculation Hydropath unit Particles become chargedTurbulence mixes up particles; flock formed Pump Filter Filter removes flock

22 Bacteria and Algae

23 Na Cl Na Cl Cl Na H2OH2OH2OH2O H2OH2OH2OH2O Osmosis and Bacteria Semi-permeable membrane Semi-permeable membrane: passes water, but not salt. Water flows from dilute to concentrated region

24 Na Cl Na Cl Cl Na H2OH2OH2OH2O H2OH2OH2OH2O H2OH2OH2OH2O H2OH2OH2OH2O Na Cl Na Na Cl Cl H2OH2OH2OH2O H2OH2OH2OH2O Na Cl H2OH2OH2OH2O H2OH2OH2OH2O Na Cl H2OH2OH2OH2O H2OH2OH2OH2O Na Cl H2OH2OH2OH2O H2OH2OH2OH2O Na Cl Osmosis and Bacteria Semi-permeable membrane Semi-permeable membrane: passes water, but not salt. Water flows from dilute to concentrated region Bacteria cell: semi-permeable membrane In distilled water, water flows into bacteria Bacteria becomes “too dilute”, dies, bursts (kills even “freshwater” bacteria)

25 Hydropath and Bacteria Cl Na Na Cl Cl Na Cl Cl Cl Na Na Na Na Cl Cl Na Na Cl Cl Na Cl Cl Cl Na Na Na Na Cl Cl Na Cl Cl Cl Na Cl Cl Na Cl Cl Cl Na Cl Consider bacteria in salt water Hydropath charges bacteria, creating a wetting layer Layer of very pure water around bacteria Osmosis forces water into bacteria Bacteria dies

26 Hydropath and Bacteria

27 Cooling Towers Heat increase Pressure decrease Limescale Flocculation Bacteria and Algae

28 Cooling Towers Black = cold White = hot Hot coffee on edge of mug

29 Side-stream Filtering Side stream filter removes and returns water to same place Some of the water has already been filtered Need to pass about 10 times the total volume through filter before all water is filtered

30 Summary Electronics Limescale Flocculation Bacteria and Algae

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