Classifications

• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/30—Treatment of water, waste water, or sewage by irradiation
  • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
  • C02F1/325—Irradiation devices or lamp constructions
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2201/00—Apparatus for treatment of water, waste water or sewage
  • C02F2201/32—Details relating to UV-irradiation devices
  • C02F2201/322—Lamp arrangement
  • C02F2201/3227—Units with two or more lamps

Definitions

• the invention relates to the field of water treatment for disinfection, especially in the context of potabilization process.
• the invention relates to the disinfection of water by ultraviolet radiation.
• the invention applies to water disinfection devices presented in the form of closed reactors.
• Reactors using several UV lamps arranged parallel to the flow of water to be treated and integrated into systems having an L, U or Z configuration are known in particular.
• the lamps are parallel to an axis of the reactor.
• the replacement of the lamps in such reactors is possible thanks to the presence at at least one end thereof of flanges on which are fixed the quartz envelopes of the lamps. These flanges are also used for sealing the reactor.
• one to several lamps are mounted in an enclosure in such a way that they extend perpendicular to the flow of water to be treated.
• a reactor of this type is generally used for a use corresponding to medium pressure lamps.
• Reactors of this type use lamps that have relatively high linear powers, these powers being of the order of 50 Wuvc / cm. These medium pressure lamps have the advantage of being compact. However, their energy efficiency is low, and therefore their power consumption is about twice as high as low pressure lamps.
• Another type of reactor is known according to which a plurality of lamps is provided, the lamps being arranged perpendicularly to the stream of water to be treated, in a parallelepipedal structure and a spacing arrangement.
• reactor design allows the use of low pressure lamps advantageous for their low operating cost as already mentioned above.
• reactors of this type have the disadvantage of offering only a low resistance to pressure due to the parallelepipedic structure that characterizes them, and a high cost, which of course tends to restrict their operation.
• the invention particularly aims to overcome the disadvantages of the prior art.
• the object of the invention is to propose a new reactor design for the treatment of water by UV radiation, of the type implementing a plurality of means forming UV lamps, which makes it possible to optimize the power diffused with respect to conventional reactors of the same type.
• the invention also aims to provide such a reactor that allows easy installation, easy access to lamps and easy disassembly thereof for maintenance.
• the invention also aims to provide such a reactor that provides a satisfactory resistance to pressure.
• the invention also aims to provide such a reactor that can handle relatively large amounts of water.
• Another object of the invention is to provide such a reactor which is simple in design and can be manufactured and implemented in an easy and inexpensive manner.
• the means forming lamps include a UV lamp itself and a quartz sleeve protecting this lamp
• the reactor according to the invention makes it possible to combine the advantage of a relatively large processing capacity with that of a particularly efficient distribution of the UV radiation dispensed by the lamp means.
• the principle of the invention makes it possible to arrange the means forming UV lamps inclined with respect to the longitudinal axis of the reactor by excluding a perpendicular position of these means forming lamps with respect to this axis.
• the lamp means occupy the cylindrical space delimited by the housing in an optimized manner, this compared to a reactor of the prior art which would use a number of means forming equivalent lamps.
• a reactor according to the invention has the advantage of offering a satisfactory resistance to pressure due to the cylindrical shape of its housing.
• the angle of inclination of at least some of said lamp means inclined relative to the longitudinal axis of the reactor is less than 45 °.
• at least some of said lamp means are disposed inside said housing forming several non-zero angles and different from 90 ° with the longitudinal axis of said substantially cylindrical housing.
• the distribution of the lamp means in the reactor chamber is further optimized, which improves the distribution of the UV radiation and the distribution of the lamps. dose.
• said input means and / or said outlet means of the treated water have access means to at least some of the UV lamps of said lamp means.
• the maintenance and / or replacement of the lamps can thus be easily performed.
• said access means are preferably distributed in a ring on said input means and / or on said output means.
• the access means in question are distributed over a frustoconical portion of said input means and / or said output means.
• the device has at least a first set of means forming UV lamps, at least some of which cooperate at one of their ends with an access means provided on said input means or on said output means and in that the other of their ends is accommodated by at least one support element provided inside said housing.
• said first set of lamp means comprises a first series of UV lamp means forming at least a first angle of zero or non-zero with a longitudinal plane P of said cylinder and a second series of lamp means. UV forming at least a second angle d2 nonzero and different from the angle dl with said longitudinal plane P of said cylinder.
• the spatial distribution of the lamp means inside the reactor is thus optimized, creating a sort of entanglement of the lamp means while providing regular spaces between them so as to operate a homogeneous treatment within the reactor enclosure.
• said lamp means of the first series form an angle ô'i with a plane P 'perpendicular to the plane P and in that said lamp means of the second series form an angle of 2 with said plane P '.
• the reactor has two sets of means forming UV lamps, namely:
• the size of the access means is distributed in this way (their number being further increased by the fact of the implementation of a second set of lamps) to the means forming lamps on the control means. on the one hand, and on the output means on the other hand.
• the access means are thus advantageously spaced from each other, which facilitates the assembly and / or maintenance phases.
• said second set of lamp means comprises a first series of UV lamps forming at least a first angle ⁇ 1 zero or non-zero with a longitudinal plane P of said cylinder and a second series of means forming UV lamps forming at least a second angle ⁇ 2 not zero and different from the angle ⁇
• said lamp means of the first series form an angle ⁇ '1 with a plane P 'perpendicular to the plane P and said lamp means of the second series form an angle ⁇ '2 with said plane P'.
• said first support and / or said second support have a substantially star-shaped shape, the central portion of which accommodates the end of certain means forming lamps and whose tips accommodate the ends of other means forming lamps.
• said central portion of said supports is advantageously connected to said points by thin branches.
• FIG. 1 is a perspective view of the internal structure of a reactor according to a first embodiment of the invention
• FIGS. 2 and 3 are partial views to reveal the angles characterizing the inclination of the lamp means in the reactor according to the first embodiment
• FIG. 4 is a perspective view of the internal structure of a reactor according to a second embodiment of the invention.
• FIG. 1 illustrates a partial view of a first embodiment of a reactor according to the invention, in which the cylindrical casing is not shown to enable the internal structure of the reactor to be unveiled.
• the reactor comprises inlet means 2 for water and outlet means 3 for water between which a cylindrical housing extends
• the inlet means 2 are designed to be secured to a water supply pipe to be treated, while the outlet means 3 are designed to be secured to a pipe for discharging the treated water.
• UV lamps 4 are provided inside this casing. It will be noted that, in other embodiments, this number of lamp means can of course be different. In a conventional manner these lamp means include a UV lamp itself and a quartz sheath protecting this lamp. In this embodiment, the lamps have a length of 1500 mm and quartz envelopes a length of 1700 mm. The cylindrical housing has a diameter of about 600 mm.
• such a reactor has an installed power of about 4 kW and therefore a UVC power of about 1.3 kW.
• Each of the lamp means 4 is inclined with respect to the longitudinal axis of the reactor. It will be noted however that, in other embodiments, only certain lamp means may be inclined, the other lamp means may then extend parallel to the longitudinal axis of the reactor.
• All the lamps 4 are connected at one of their ends to a support element 6 roughly having a star shape 6 provided within the reactor, towards the outlet thereof and at the other of their ends to access means 5 provided on an essentially frustoconical part 2a water inlet means 2 in the reactor.
• These access means include orifices provided in this frustoconical portion.
• the support element 6 has a central portion 61 and spikes 62 connected to the central portion 61 by thin branches 63. The fineness of the branches 63 makes it possible to disturb the flow of water in the reactor to a minimum.
• the access means 5 accommodate the end of the quartz envelopes of the lamp means and include protection means 5a (cap-type possibly screwable) of these ends.
• Such a reactor has both the advantage of concentrating a number of means forming high lamps in a cylindrical reactor volume and that of allowing easy access to lamps for their maintenance and replacement. To do this, simply remove the caps 5a and remove the lamps by extracting them by the access means 5. During this operation the quartz sheaths of the lamp means remain in place. New lamps can then be reintroduced into the reactor. Simply slide the lamps along the quartz sheaths, an operation facilitated by teflon rings arranged along the lamps.
• a metallic cone 7 is provided at the level of the lamp means 42 so as to prevent a volume of water from being irradiated by the UV radiation dispensed by the lamps but directed towards the lamps at the periphery.
• the lamps 4 are divided into two series, namely a first series of five lamp means 41, one end of which is secured to the tips 62 of the element 6 and a second series of five lamp means 42. one end of which is secured to the central portion 61 of this element.
• the lamp means 41 of the first series are inclined at an angle different from the angle of inclination of the lamp means 42 of the second series. It will be noted, however, that according to other embodiments, the number of lamp means of the first series may be different from that of the second series.
• FIG. 1 shows the reactor shown in Figure 1 but with only one lamp means 41 of the first series.
• FIG. 1 shows the reactor shown in Figure 1 but with only one lamp means 41 of the first series.
• these means forming lamps 41 have:
• the angle d.sub.1 may more generally according to the embodiments be between 5 ° and 50 ° and the angle ⁇ '1 may be between 0 ° and 30 °.
• FIG 3 shows the reactor shown in Figure 1 but with only one lamp means 42 of the second series.
• the planes P and P 'longitudinal perpendicular to the reactor have been shown in this figure.
• angles ⁇ let 32 may be between 5 ° and 50 ° and the angles ⁇ 'i and ⁇ '2 may be between 0 ° and 30 °.
• the angles comt d2 reflect the fact that the lamps gather towards the axis of revolution of the reactor.
• the angles ⁇ 'and ⁇ ' 2 when they are not zero, mean that these lamps forming means, although gathering towards the axis of revolution of the reactor do not converge on it. Thus, it avoids problems when mounting the lamps and a bad distribution of the power of these resulting from a concentration too high UV at a given point.
• FIG. 4 illustrates a second embodiment of the invention according to which, in addition to a first set of ten lamp means 41, 42 arranged essentially as in the first embodiment described above, a second set of ten means is provided. forming lamps 43, 44 whose one end is connected to access means provided on a frustoconical portion 3a of the outlet means 3 and whose other ends are connected to a support member 6 'provided near the input means 2 According to this embodiment the two sets of lamp means are somehow imbricated head-to-tail in one another.
• the means forming UV lamps have the same dimensions as those indicated above but the cylindrical housing has a larger diameter, namely 955mm.
• a reactor has an installed power of about 8 KW and therefore a power
• UVC of about 2.5 KW.
• the lamp means 4 are therefore divided into two sets of lamp means, each of these sets having two sets of lamp means.
• the first and second sets of lamp means 41, 42 are arranged identically but in opposite directions.
• the second set of lamp means comprises two series of lamp means, namely a first series of five lamp means 43, one end of which is secured to the tips 62 of the element 6 'and a second series of five means forming lamps 43 whose end is secured to the central portion 61 of this element.
• the lamp means 41 of the first series are inclined at an angle different from the angle of inclination of the lamp means 42 of the second series.
• the number of lamp means of the first series may be different from that of the second series.
• FIG. 5 represents the reactor shown in FIG. 3 but with only one lamp means 43 of the first series. .
• FIGS. 5 and 6 For the sake of clarity of the description of the planes P and P 'longitudinal perpendicular to the reactor have been shown in this figure.
• these means forming lamps 43 have:
• an angle of inclination ⁇ 1 with respect to a longitudinal plane P of the reactor equal to 9 ° and an angle ⁇ '1 with respect to a plane P 'perpendicular to the plane P of the reactor equal to 16 °.
• the angle ⁇ 1 may more generally according to the embodiments be between 5 ° and 50 ° and the angle ⁇ '1 may be between 0 ° and 30 °.
• Figure 6 shows the reactor shown in Figure 1 but with only one lamp means 42 of the second series.
• the planes P and P 'longitudinal perpendicular to the reactor have been shown in this figure.
• lamps 44 have:
• angles ⁇ 1 and ⁇ 2 may be between 10 ° and 50 ° and that the angles ⁇ '1 and ⁇ '2 may be between 0 ° and 30 °.

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• Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Hydrology & Water Resources (AREA)
• Engineering & Computer Science (AREA)
• Environmental & Geological Engineering (AREA)
• Water Supply & Treatment (AREA)
• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Physical Water Treatments (AREA)
• Physical Or Chemical Processes And Apparatus (AREA)

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• 2005
  • 2005-01-21 FR FR0500673A patent/FR2881130B1/fr not_active Expired - Fee Related
• 2006
  • 2006-01-04 AU AU2006207542A patent/AU2006207542B2/en not_active Ceased
  • 2006-01-04 US US11/814,343 patent/US7683354B2/en not_active Expired - Fee Related
  • 2006-01-04 CN CNB2006800028496A patent/CN100533346C/zh not_active Expired - Fee Related
  • 2006-01-04 CA CA002593824A patent/CA2593824A1/en not_active Abandoned
  • 2006-01-04 JP JP2007551650A patent/JP2008528249A/ja not_active Ceased
  • 2006-01-04 EP EP06704263A patent/EP1838624A1/de not_active Withdrawn
  • 2006-01-04 WO PCT/EP2006/050046 patent/WO2006077177A1/fr active Application Filing
• 2007
  • 2007-07-02 ZA ZA200705367A patent/ZA200705367B/xx unknown
  • 2007-07-19 NO NO20073771A patent/NO20073771L/no not_active Application Discontinuation
  • 2007-07-20 TN TNP2007000280A patent/TNSN07280A1/en unknown
  • 2007-07-26 MA MA30099A patent/MA29166B1/fr unknown

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