CH710444B1 - Basin with ozone water treatment plant. - Google Patents

Abstract

The invention relates to a pond (1) provided with a water treatment plant (6, 7, 8), comprising an ozone generator (6), arranged to generate ozone and to inject into the basin a treated water low in ozone and, intermittently, a water rich in ozone for a bacteriological treatment of the water in the basin. The basin is provided with a plurality of nozzles (2) for the simultaneous injection of ozone-rich water at several points of the basin (1), in particular to homogenize the distribution of ozone within the basin.

Description

Description

TECHNICAL FIELD [0001] The present invention relates to a pool, for example a swimming pool, a spa, a jacuzzi, etc., with a water treatment installation.

State of the art [0002] US 6 824 695 describes a method of treating water using an ozonator and then an ultraviolet lamp also used for the destruction of residual ozone.

[0003] GB 2,306,463 describes a water decontamination system for swimming pools, which comprises a water-ozone contact chamber followed by an ultraviolet ozone destroyer.

[0004] DE 10 2004 027 574 describes different water treatment schemes with ozone injection followed by ultraviolet treatment for both sterilizing and destroying ozone.

[0005] US20 110 247 972 discloses a system for treating water with ozone and ultraviolet radiation.

[0006] DE 10 040 566 discloses a method of treating water by means of an ultraviolet lamp also producing ozone used for the treatment.

No. 4,959,142 discloses a device for sterilizing swimming pool water using an ozone and then an ultraviolet (UV) application. A system is triggered automatically in case of breakage of the transparent portions of the tube, to avoid flooding by short-circuiting the ultraviolet filter. Water like the ultraviolet filter or short circuit goes through a filter that destroys most of the remaining ozone before entering a pond.

[0008] EP 2,289,854 discloses a method of treating water by means of an ultraviolet lamp also producing ozone used for the treatment. A bypass circuit prevents the passage of water through a venturi, in order to regulate the amount of ozone in the treated water that joins the pool.

[0009] DE 10 022 093 discloses a method of treating water with ozone. The amount of ozone can be varied by means of valves regulating the passage passing through short circuits, so as to vary the amount of ozone between day and night.

US Pat. No. 8,025,807 discloses an ozone water treatment system comprising an ozone destroyer, a particle filter and a chemical treatment system. This device therefore requires treatment with chemicals.

DE 3 830 999 describes a system for treating water with ozone, with ozone injection in a buffer tank in the water circulation circuit.

[0012] WO 9 820 910 discloses a wastewater treatment system by exposure to a magnetic field, ozone and ultraviolet. Several treatment cycles can be provided.

US 5,288,461 discloses a water treatment device using ultraviolet radiation in two wavelengths.

No. 2,080,290,045 relates to a method of decontamination using ultraviolet rays and ozone.

US 5,512,178 relates to a method and a water treatment device involving the use of ozone and ultraviolet rays.

EP 2 165 978 also relates to a method and a water treatment device involving the use of ozone and ultraviolet rays.

[0017] WO 9 306 871 relates to a water sterilization apparatus provided with an ozone chamber and an ultraviolet radiation chamber.

These various documents of the prior art show that it is known to treat water using ultraviolet and / or ozone to reduce the number of bacteria. It is also known to use an ultraviolet lamp to reduce the residual ozone level in the water after its treatment, and thus avoid the inconvenience caused by a high level of dissolved ozone in the water.

In the particular case of water treatment of a pool or a pool, the above solutions only treat the water reinjected into the basin, but not the water that stagnates in the basin himself. Complementary chemical treatment, for example using chlorine, is necessary to treat stagnant water and in particular to prevent the deposition of algae that can develop in stagnant water against the walls and scales of the pond. example. Existing processes can reduce the amount of chlorine or chemicals in the pond, but not remove them completely, because it is difficult to recycle all of the water through the device; untreated standing water persists in most basins.

WO 2013/079 608 whose content is included by reference proposes a water treatment device, with a device for controlling either an injection of treated water low in ozone, or an injection of water rich in ozone . This device therefore allows either an injection of ozone upstream of an ozone destruction device or downstream of this destruction device. In the first case, the water is treated and then reinjected into the basin after destruction of the ozone. In the second case, a water rich in ozone is injected into the basin to apply a shock treatment when the pool is not used, which effectively removes algae and bacteria in the basin.

However, tests have shown that very high concentrations of ozone are needed to spread throughout the basin a concentration of ozone sufficient to kill algae and bacteria. However, high ozone concentrations in the inlet nozzle produce ozone bubble formation and significant ozone release near the nozzle, which is not available to treat water in the rest of the basin. As a result, the treatment of water is insufficient and the release of ozone into the ambient air is high, resulting in a risk of discomfort or even accidents if users pass by the pool during this treatment.

BRIEF SUMMARY OF THE INVENTION [0022] There is therefore a need for basins with a water treatment installation that make it possible to limit the drawbacks of the prior art.

In particular, there is a need for a water treatment solution in a basin that avoids or limits the need for chemicals and limits the dispersion of ozone in the air.

There is also a need for a water treatment solution in a basin that improves the quality of treatment, especially against algae.

The invention is part of the finding that most pools and basins are used for a limited number of hours each week, and that dissolved ozone levels not damaged during the hours during which the pool n is not used are less problematic.

The art also starts from the observation that algae and organic deposits are formed above all against the vertical walls of the basin, or against ladders or stairs, and much more slowly in the middle of the basin. [0027] Starting from these findings, the invention provides a pool with water treatment facility, comprising: an ozone generator, arranged to generate ozone and to inject into the basin a treated water low in ozone and, intermittently, a ozone-rich water for bacteriological treatment of water in the basin; a plurality of nozzles for the simultaneous injection of ozone-rich water at several points of the basin.

The injection of ozone-rich water simultaneously at several points in the basin, preferably for several hours, makes it possible to limit the density of ozone which must be dissolved in the water and thus, paradoxically, to reduce the quantity of total ozone that is needed to completely treat a pond.

"Intermittently" means for example every 24 hours, for example every night, for example for less than 8 hours each night, for example a duration of 4 to 6 hours.

The injection of water rich in ozone at several points also limits the loss of efficiency due to ozone which is released quickly by the water surface at a distance from the nozzles.

This arrangement also improves the homogeneous distribution of water rich in ozone at several points in the basin, preferably homogeneously throughout the basin.

In a preferred embodiment, some nozzles, or all nozzles, are arranged to inject ozone-rich water in a direction substantially parallel to the vertical walls of the basin. This results in a particularly high ozone density against the vertical walls of the basin, which effectively fight against organic deposits and algae formation at these sensitive points. This also results in a lower density of ozone in the center of the basin, ie where ozone is less needed, which limits the amount of surplus ozone to be produced and released into the atmosphere. ambiant air.

Some nozzles may also be arranged to inject ozone-rich water in a direction substantially parallel to the vertical walls of the basin towards the ladders or stairs of the basin.

At least some nozzles may be arranged against the vertical walls of the basin to more than 50 cm deep. In this way, at least the upper part of the vertical walls of the basin, which is the most exposed, is subjected to an ozone-rich intermittent ozone flow.

Some nozzles may also be arranged against the vertical walls, preferably less than 10 centimeters from the bottom.

Some nozzles may also be arranged at the bottom of the basin, directed against the walls.

In the text, the terms "ozone poor" and "ozone rich" are relative to each other. The device makes it possible either to produce at the outlet a water with a first ozone level (so-called ozone-depleted water), or a high with a second ozone level higher than the first rate (so-called ozone-rich water). In practice, ozone-depleted water is suitable for bathing and drinking, while ozone in ozone-rich water is sufficient to provide significant bacteriological treatment.

In one embodiment, the ozone-depleted water is substantially devoid of measurable traces of dissolved ozone. The so-called ozone-rich water contains for example between 1 and 4 grams of ozone injected per hour for an average basin of 240 cubic meters for example. These concentrations are sufficient to treat the entire pool provided ozone is applied for a sufficient time, for example for at least 3 or 4 hours every 24 hours, for example at night or when the pool is not used. Higher concentrations may also be used for shorter durations, but with a higher accident risk for potential visitors.

In a preferred embodiment, the water treatment device of the invention does not include any device or chemical treatment means, apart from ozone.

In one embodiment, the water treatment device of the invention does not include any filtration device.

In a preferred embodiment, the water treatment device of the invention performs a treatment of water only by means of ozone and ultraviolet, to the exclusion of any other additional means of treatment. .

The device of the invention allows the user to choose whether he wants a water treatment through the ozone destroyer to destroy dissolved ozone, for example during hours of use. a swimming pool, or if it prefers that this dissolved ozone enters the basin, for example in order to treat the water in the basin when it is not used.

BRIEF DESCRIPTION OF THE FIGURES [0043] Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which: FIG. 1 illustrates a schematic view of the water treatment device according to the invention, the valves being controlled so as to cause an ozone injection upstream of an ozone destroyer.

Examples of implementation of the invention are indicated in the description illustrated in the attached figure which schematically shows a top view of a pool, as an example of a pool, with an ozone generating device.

Example (s) of Embodiment of the Invention [0046] FIG. 1 in the appendix illustrates a pool 1, here a pool seen from above, with a water treatment device 6, 7, 8. This device may be in accordance with that described in the patent application WO 2013/079 608, and will only be succinctly described.

The water to be treated is recovered by a skimmer 10, for example in a channel at the edge of the basin or, in the case of an overflow pool, outside the walls of the basin. A pump 8 can pump it through a pipe 11 and bring it to the treatment device 6, 7, 8. This device comprises in this example a sand filter 7 (optional) and a treatment unit. Ozone and ultraviolet 6. This device comprises, in known manner, an ultraviolet lamp for generating ozone injected into the water to be treated, then another ultraviolet lamp operating at a different frequency to destroy the residual ozone in the water. treated water, in order to inject into the basin 1 treated water (that is to say without bacteria) poor in ozone.

The device 6 also allows to inject in the basin 1 water rich in ozone without passing it through the ozone destroyer. This treatment, called "ozone-shock", is preferably performed during the night or when the pool is not used, because it has the effect of releasing, for a period of a few hours, a significant amount of ozone in the pool and in the surrounding air, which could inconvenience swimmers. In one embodiment, an amount of ozone of the order of 1 to 10 grams of ozone per hour, preferably 1 to 4 grams, is injected into the pond for a period of 3 to 6 hours each night. This injection makes it possible to increase the concentration of ozone in the pond 1 for a sufficient period of time, and thus to destroy the algae and other organic bodies that can develop there. The proposed concentration is however low enough to avoid the risk of accident even if a sensitive visitor enters the pool during treatment.

According to the invention, the treated ozone-poor water, as well as the ozone-rich water injected during the shock treatment, are injected into the basin 1 through the introduction pipe 9 and the nanny 5. (That is to say a distributor) which distributes the water via several nozzles 2 distributed all around the basin. In the illustrated example, each nozzle 2 is fed by a solenoid valve 4 controlled individually by the control electronics (not shown), which makes it possible to control the introduction of water by the different nozzles, and for example to proceed with a local injection of ozonated water. However, it is also possible to provide a single valve, for example a solenoid valve, on the pipe 9, or to group several nozzles on the same valve.

The nozzles 2 are advantageously arranged against the vertical walls 12 of the basin 1, so as to increase the concentration of ozone against these walls during the shock treatment with water rich in ozone, without increasing it in unnecessary proportions. in the center of the basin. They may for example be arranged against the vertical walls, at least 50 centimeters from the surface, or near the bottom, so that at least the upper part of the vertical walls

Claims (6)

12 of basin 1 are exposed to a significant concentration of ozone. In the illustrated embodiment, the nozzles are made in such a way that the ozonated water jet 3 produced by each nozzle leaves the nozzle in a direction d substantially parallel to the vertical wall 12 on which the nozzle is mounted. "Substantially parallel" means in the context that the angle between the average axis d of the stream 3 and the vertical wall is less than 30 °, preferably less than 15 °, for example less than 5 °. Each nozzle may produce one or more jets in one or more preferred directions, as in the figure, or an annular jet 180 or 360, in a plane substantially parallel to the vertical wall on which the nozzle is mounted. In another embodiment, at least one nozzle is disposed at the bottom of the pool, near an edge, so as to produce a stream of ozonated water oriented against an adjacent wall and which goes up along this wall. It is also possible to use a perforated pipe against a wall or on the bottom near a wall as a nozzle. At least one nozzle may be arranged to project an ozonated water jet towards a staircase, a ramp or steps of the basin. The water injected by the majority of the nozzles 2 is preferably in the direction of the skimmer 10, to create a movement of water to the skimmer. At least one nozzle may be disposed near the surface of the water to force the flow of water to the skimmer, to bring the leaves and debris to the skimmer. The introduction of ozone-poor water is advantageously by the same nozzles as the introduction of ozone-rich water. By controlling the valves or solenoid valves, however, it can be done by a subset of these nozzles. claims A pond (1) with a water treatment plant (6, 7, 8), comprising: an ozone generator (6), arranged to generate ozone and to inject into the pond a treated water poor in water; ozone and, intermittently, water rich in ozone for bacteriological treatment of water in the basin; characterized by a plurality of nozzles (2) for simultaneous injection of ozone-rich water at several points of the pond (1). 2. Pool according to claim 1, wherein at least some nozzles (2) are arranged to inject the ozone-rich water in a direction (d) substantially parallel to an adjacent vertical wall (12) of the basin (1). 3. Basin according to claim 1 or 2 wherein at least some nozzles (2) are arranged against a vertical wall (12) of the basin (1) to more than 50 cm deep. 4. Pool according to one of claims 1 to 3, wherein at least some nozzles (1) are arranged at the bottom of the basin (1). 5. Pond according to one of claims 1 to 4, comprising an introduction pipe (9) downstream of the ozone generator, and a nurse (5) arranged to distribute the water of the introduction pipe in said nozzles (2). 6. Pond according to one of claims 1 to 5, the ozone generator (6) being arranged to inject into the pool less than 10 grams of ozone per hour for a period of several hours every 24 hours.