JP2016064340A - Water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treatment apparatus which can suppress degradation in start-up performance of an electric discharge lamp without changing starting voltage.SOLUTION: A water treatment apparatus 1 includes a water flow pipe 10, a plurality of electric discharge lamps 20 and a start-up auxiliary part 40. The water flow pipe 10 has light-shielding properties and makes treated water pass through. The plurality of electric discharge lights 20 radiate ultraviolet rays in the water flow pipe 10. The start-up auxiliary part 40 applies light to at least one electric discharge lamp 22 (20) of the plurality of electric discharge lamps 20 during the time from non-lighting of the plurality of electric discharge lamps 20 until starting lighting thereof.SELECTED DRAWING: Figure 1

Description

  Embodiments of the present invention relate to a water treatment apparatus using a discharge lamp that irradiates ultraviolet rays.

  Conventionally, a water treatment apparatus using a discharge lamp that irradiates ultraviolet rays is known. Many water treatment apparatuses using discharge lamps that irradiate ultraviolet rays are hermetically sealed so that ultraviolet rays do not leak from a portion through which water to be treated passes. Since such a water treatment apparatus is in a state in which light from the outside does not enter (hereinafter referred to as “dark state”), if the thermal electrons in the discharge lamp disappear after turning off, the startability of the discharge lamp is poor. Become. In such a water treatment apparatus, by entering light from the outside, the number of electrons in the discharge lamp increases, and the startability of the discharge lamp can be improved to a certain level.

  By the way, a discharge lamp that irradiates ultraviolet rays has its startability determined by the product of the applied voltage and time, and is generally turned on when the applied voltage increases. However, when the number of electrons in the discharge lamp is extremely small or absent, the starting voltage designed on the ballast side is insufficient and the lamp may not light up. In particular, since the inside of the water treatment apparatus is in a dark state, when the discharge lamp is lighted frequently, the startability may be deteriorated due to the absence of electrons in the discharge lamp.

JP2012-250166A

  In the case as described above, usually, a measure of increasing the starting voltage is taken. However, in place of the measure of increasing the starting voltage, another measure that can suppress the deterioration of the startability of the discharge lamp is required.

  An object of this invention is to provide the water treatment apparatus which suppresses the deterioration of the startability of a discharge lamp, without changing a starting voltage.

  The water treatment apparatus of the present embodiment includes a water pipe, a plurality of discharge lamps, and a start assist unit. The water pipe has a light shielding property and allows water to be treated to pass therethrough. The plurality of discharge lamps emit ultraviolet rays in the water pipe. The start assist unit irradiates at least one of the plurality of discharge lamps with light during a period from when the plurality of discharge lamps are not lit to when lighting is started.

  ADVANTAGE OF THE INVENTION According to this invention, the water treatment apparatus which suppresses the deterioration of the startability of a discharge lamp can be provided, without changing a starting voltage.

1 is a cross-sectional view illustrating a water treatment apparatus according to Embodiment 1. FIG. FIG. 2 is another cross-sectional view illustrating the water treatment apparatus according to the first embodiment. FIG. 3 is a cross-sectional view schematically showing the flow of water in the water treatment apparatus according to the first embodiment. FIG. 4 is a cross-sectional view showing a water treatment apparatus according to the second embodiment. FIG. 5 is another cross-sectional view illustrating the water treatment apparatus according to the second embodiment. FIG. 6 is a conceptual diagram illustrating an example in which the water treatment apparatus according to the first embodiment is used for ballast water treatment of a ship.

  The water treatment apparatuses 1 and 2 according to the first and second embodiments described below have light shielding properties and water pipes 10 and 110 that allow water to be treated to pass through, and radiate ultraviolet rays in the water pipes 10 and 110. Starting aid for irradiating at least one discharge lamp 22 (20) of the plurality of discharge lamps 20 between when the plurality of discharge lamps 20 and the plurality of discharge lamps 20 are not lit until starting lighting Part 40,60.

  In addition, in the water treatment apparatuses 1 and 2 according to Embodiments 1 and 2 described below, the start-up auxiliary units 40 and 60 allow light outside the water pipes 10 and 110 to enter the water pipes 10 and 110. It has the light guide bar 41 or the window 61 as a lighting part.

  In addition, in the water treatment apparatuses 1 and 2 according to the first and second embodiments described below, the start assisting units 40 and 60 include a light guide bar 41 or a window 61 as a daylighting unit that does not transmit ultraviolet rays.

  Further, in the water treatment apparatus 1 according to Embodiment 1 described below, the start assisting unit 40 is in the vicinity of one discharge lamp among the plurality of discharge lamps 20 in the water conduit 10, and includes at least one discharge lamp. It has the light guide bar 41 as a lighting part arrange | positioned in the position which irradiates light to the electric lamp 22 (20).

  Moreover, in the water treatment apparatuses 1 and 2 according to Embodiments 1 and 2 described below, the start assisting unit 40 includes a light bulb including a solid light emitting element or a filament as the light sources 42 and 62.

  Moreover, in the water treatment apparatuses 1 and 2 which concern on Embodiment 1 and Embodiment 2 demonstrated below, the some discharge lamp 20 contains a medium pressure ultraviolet lamp.

  Moreover, the water treatment apparatuses 1 and 2 which concern on Embodiment 1 and Embodiment 2 demonstrated below are mounted in the ship 70, and the water treatment at the time of discharging | emitting the ballast water currently hold | maintained in the ship 70 out of the ship 70 Used for.

[Embodiment 1]
First, the water treatment apparatus 1 which concerns on Embodiment 1 of this invention is demonstrated based on drawing. FIG. 1 is a cross-sectional view showing a water treatment apparatus 1 according to the first embodiment, specifically, a cross-sectional view in a direction of a pipe axis of a water flow pipe 10 to be described later (hereinafter referred to as “pipe axis direction”). FIG. 2 is another cross-sectional view showing the water treatment apparatus 1 according to the first embodiment, specifically, a cross-sectional view orthogonal to the tube axis of the water flow pipe 10 to be described later.

  The water treatment apparatus 1 according to the present embodiment includes a water conduit 10, a discharge lamp 20, a protective tube 30, a start assisting unit 40, and a cleaning mechanism 50. The water flow pipe 10 has a light shielding property and allows water to be treated to flow therethrough. For the water conduit 10, for example, a material such as stainless steel is used.

  As shown in FIGS. 1 and 2, the water flow pipe 10 has a water flow part 11 whose outer diameter is cylindrical and whose inside is a cavity. And the inflow part 12 and the outflow part 13 are each protrudingly provided in the both ends of the pipe-axis direction in the surrounding wall of the water flow part 11. As shown in FIG. In the example shown in FIGS. 1 and 2, the inflow portion 12 and the outflow portion 13 are protruded with their directions aligned. Here, the inflow part 12 and the outflow part 13 are formed in a hollow cylindrical shape, for example, and communicate with the inside of the water flow part 11. Moreover, the inflow part 12 and the outflow part 13 are connected with piping for inflow or outflow of water. That is, light does not enter the water conduit 10 from the outside of the water conduit 10 except for light incident from the start assist unit 40.

  Here, the flow of water in the water treatment apparatus 1 according to the present embodiment will be described with reference to FIG. FIG. 3 is a cross-sectional view schematically showing the flow of water in the water treatment apparatus 1. In addition, in FIG. 3, in order to demonstrate the flow of the water in the water flow pipe 10 in the water treatment apparatus 1, the figure which abbreviate | omitted description of the starting auxiliary | assistant part 40 and the cleaning mechanism 50 is shown. First, in the example shown in FIG. 3, water (treated water) flows into the water conduit 10 from the inflow portion 12 of the water conduit 10. And water (to-be-processed water) flows the water flow part 11 of the water flow pipe 10 in a pipe-axis direction. At this time, the water (water to be treated) flowing through the water conduit 10 is subjected to purification treatment such as sterilization by a plurality of discharge lamps 20 described later, details of which will be described later. Thereafter, the water (treated water) that has passed through the water flow part 11 flows out of the water flow pipe 10 from the outflow part 13. That is, the water flowing through the water conduit 10 flows through the water conduit 10 along a route schematically shown by the arrow f1 in FIG.

  Returning to FIGS. The water treatment apparatus 1 includes a plurality of (for example, four, six, eight, etc.) discharge lamps 20 that emit ultraviolet rays inside the water pipe 10. In the present embodiment, as the discharge lamp 20, for example, an ultraviolet lamp capable of emitting ultraviolet rays having a wavelength of 200 to 400 nm is used. Such an ultraviolet lamp is called an intermediate pressure ultraviolet lamp, and has a mercury vapor pressure of 40 kPa or more during lighting. As described above, the medium pressure ultraviolet lamp emits ultraviolet light including a wavelength effective for sterilization.

  In the example shown in FIGS. 1 and 2, the discharge lamp 20 has a straight tube bulb 21 formed in a cylindrical shape. The bulb 21 is a straight tube bulb having ultraviolet transparency, and for example, transparent quartz glass, soda lime glass, borosilicate glass, or the like is used. The bulb 21 is filled with a rare gas such as amalgam, argon, or xenon. Further, for example, a fluorescent material that emits ultraviolet light when irradiated with light having a predetermined wavelength may be applied to the inner peripheral surface of the bulb 21.

  Although illustration is omitted, for example, tungsten containing tria (tria dioxide) is used for the electrodes (filaments) provided at both ends of the bulb 21. Further, terminal pins connected respectively to the pair of lead wires connecting the above-described electrodes are provided on the outer end surfaces of the caps that are fitted and fixed to both ends of the bulb 21. The discharge lamp 20 is supplied with power from, for example, the terminal pins described above. The discharge lamp 20 is supplied with electric power from a lamp lighting device such as a power connection structure or a ballast (not shown).

  From here, the arrangement | positioning relationship between the water flow pipe 10 and the some discharge lamp 20 is demonstrated. As shown in FIG. 1, the plurality of discharge lamps 20 are arranged along the tube axis of the water pipe 10 through the tube axis. Further, the plurality of discharge lamps 20 are arranged at equal intervals in a cross section orthogonal to the tube axis of the water conduit 10. In the example shown in FIGS. 1 and 2, a shaft portion 51 of a cleaning mechanism 50 to be described later is provided at the center portion in a cross section orthogonal to the tube axis of the water conduit 10, and the plurality of discharge lamps 20 are It arrange | positions so that the space | interval of the axial part 51 of the cleaning mechanism 50 and each discharge lamp 20 may become substantially equal. Thereby, the water treatment apparatus 1 can uniformly irradiate the water flowing through the water conduit 10 with ultraviolet rays.

  Further, in the water treatment apparatus 1 according to the present embodiment, a cylindrical protective tube 30 that protects the discharge lamp 20 is provided. In the example shown in FIGS. 1 and 2, the protective tube 30 is disposed coaxially with the bulb 21 so as to cover the outer peripheral surface of the bulb 21 of the discharge lamp 20 in the water conduit 10. The protective tube 30 is made of a material that transmits ultraviolet rays. For example, transparent quartz glass or the like is used for the protective tube 30.

  Here, as shown in FIG. 1, in the water treatment apparatus 1, the protective tube 30 that covers the outer peripheral surfaces of the discharge lamp 20 and the bulb 21 thereof is arranged so that both end portions thereof protrude from both end surfaces of the water flow portion 11. May be. For example, in the water treatment apparatus 1, portions of the plurality of discharge lamps 20 that supply power, such as the caps described above, may be disposed so as to protrude outside the water conduit 10. On the other hand, in the water treatment apparatus 1, a portion that emits ultraviolet rays, such as the bulb 21, is disposed in the water conduit 10. That is, the water treatment apparatus 1 arranges the discharge lamp 20 in the water pipe 10 so that ultraviolet rays are not emitted outside the water pipe 10. When the protective tube 30 is provided so as to cover the entire discharge lamp 20, the entire discharge lamp 20 may be disposed in the water tube 10.

  The water treatment apparatus 1 includes a start assisting unit 40 that assists lighting of the plurality of discharge lamps 20. The start assisting unit 40 is disposed at a position where at least one discharge lamp 22 (20) among the plurality of discharge lamps 20 is irradiated with light. Moreover, the starting auxiliary | assistant part 40 has the light guide bar 41 and the light source 42 as a lighting part. As the light guide rod 41, for example, a transparent resin such as an acrylic resin or a polycarbonate (PC) resin, or a glass such as quartz glass, soda glass, or borosilicate glass is used. Moreover, the starting auxiliary | assistant part 40 has the light bulb which comprised solid light emitting elements, such as LED (Light Emitting Diode), or a filament as the light source 42, for example.

  In the example shown in FIGS. 1 and 2, the light guide bar 41 is disposed in the vicinity of one discharge lamp 22 (20) along the tube axis direction of the water conduit 10. As a result, during the period from when the plurality of discharge lamps 20 are not lit until lighting is started, the light incident on the water conduit 10 by the light guide bar 41 is efficiently irradiated to one discharge lamp 22 (20). . Further, as shown in FIG. 2, since the light guide rod 41 is disposed near the outer periphery of the water flow portion 11, the light guide rod 41 is guided not to the central portion where the water pressure is strong but to the end portion in the cross section orthogonal to the tube axis direction of the water flow tube 10. Since the light rod 41 is located, the light guide rod 41 is not easily affected by water pressure. Here, the light guide bar 41 is disposed at one end portion (the right end portion in FIG. 1) of the water flow portion 11 of the water flow tube 10 so that the end portion is exposed. That is, the light guide bar 41 allows light to enter the inside from the exposed end portion, and guides light outside the water pipe 10 into the water pipe 10. In a discharge lamp that irradiates ultraviolet rays, for example, in the dark state, the electrons in the discharge lamp disappear, and thus a starting failure that rarely causes the discharge lamp to light may occur. Therefore, the water treatment apparatus 1 suppresses the occurrence of a start failure by causing light outside the water pipe 10 to enter the water pipe 10 by the light guide rod 41 of the auxiliary starter 40, and releases the light without changing the start voltage. Deterioration of startability of the electric lamp 20 can be suppressed.

  In the example shown in FIGS. 1 and 2, a light source 42 is disposed near the exposed end of the light guide bar 41. Specifically, it is preferable that the exposed end portion of the light guide bar 41 is arranged so that more light is irradiated from the light source 42. By arranging in this way, the light emitted from the light source 42 can be made incident into the water conduit 10 by the light guide bar 41. As a result, the number of electrons in the bulb 21 of one discharge lamp 22 (20) is increased during the period from when the plurality of discharge lamps 20 are not lit until lighting is started, and the starting characteristics of the discharge lamp 22 (20) are increased. Can be prevented.

  The water treatment apparatus 1 according to the first embodiment having the above-described configuration includes the light guide bar 41 as a daylighting portion that does not transmit ultraviolet rays, thereby preventing the light guide bars 41 from radiating ultraviolet rays to the outside of the water conduit 10. It is possible to increase the safety of light leaking out of the water conduit 10 and to suppress a decrease in the amount of ultraviolet light in the water conduit 10. In addition, deterioration of the light source 42 due to irradiation of the light source 42 with ultraviolet light can be suppressed. The light guide bar 41 may contain a material that absorbs ultraviolet rays, such as zinc oxide, titanium oxide, indium tin oxide, and the like.

  In the water treatment apparatus 1 according to the first embodiment having the above-described configuration, the start auxiliary unit 40 is in the vicinity of one discharge lamp 22 (20) of the plurality of discharge lamps 20 in the water conduit 10, and is at least one. By having the light guide rod 41 as a daylighting portion arranged at a position where light is emitted to one discharge lamp 22 (20), the start-up assistance of one specific discharge lamp 22 (20) is performed. Thereby, if the light guide bar 41 is disposed near the discharge lamp 20 and the light incident from the end of the light guide bar 41 is irradiated to one specific discharge lamp 22 (20), a plurality of mounted Since one discharge lamp 22 (20) among the discharge lamps 20 is reliably started, the other discharge lamp 20 can serve as a starting aid by the light of the first discharge lamp 22 (20). . Thus, in the water treatment apparatus 1, when one discharge lamp 22 (20) is lit, the other discharge lamps 20 can be lit in a chain by electrons emitted from the discharge lamp 22 (20). I can expect.

  In the water treatment apparatus 1 according to the first embodiment having the above-described configuration, the start assisting unit 40 includes a light bulb including a solid light emitting element or a filament as the light source 42, thereby starting the discharge lamp 20 without changing the start voltage. Sexual deterioration can be suppressed. The light source 42 may be turned on only when the plurality of discharge lamps 20 are not lit or when lighting is started (for example, for several seconds), and may be turned off when the plurality of discharge lamps 20 are lit. The light source 42 is preferably a light source that can reliably emit light with low power, and specifically, a light bulb including a solid light emitting element or a filament.

  In the example shown in FIGS. 1 and 2, the plurality of discharge lamps 20 include medium pressure ultraviolet lamps, so that deterioration of startability of the discharge lamp 20 can be suppressed without changing the starting voltage.

  Note that the start assisting unit 40 may allow natural light to enter the water pipe 10 by the light guide bar 41. In this case, the start assisting unit 40 may not have the light source 42. In this case, the water treatment apparatus 1 can easily suppress the deterioration of the starting characteristics only by using the light guide bar 41. Moreover, the light guide rod 41 can be made to allow light necessary for generating electrons to enter the water pipe 10 by using a material that transmits visible light (blue to red).

  Moreover, in the example shown in FIGS. 1 and 2, a shaft portion 51 of the cleaning mechanism 50 is provided at the center portion in the cross section orthogonal to the tube axis of the water flow pipe 10. The shaft portion 51 has a rod shape and is disposed along the tube axis direction of the water conduit 10. A connecting pipe 52 is attached to the shaft portion 51 so as to be movable in the direction of the pipe axis of the water flow pipe 10. A plurality of (for example, four) arm portions 53 extending toward each of the plurality of discharge lamps 20 are integrally formed on the connecting tube 52, and the outer peripheral surface of the protective tube 30 is provided at the tip of each arm portion 53. A cleaning unit 54 is provided in contact with a part thereof. For the cleaning unit 54, for example, Teflon (registered trademark) rubber or the like is used. When the connecting pipe 52 of the cleaning mechanism 50 moves in the direction of the pipe axis of the water flow pipe 10, the cleaning unit 54 that contacts the outer peripheral surface of each protective pipe 30 removes dirt or the like attached to the outer surface of the protective pipe 30. Remove.

[Embodiment 2]
Next, the water treatment apparatus 2 according to Embodiment 2 will be described with reference to the drawings. FIG. 4 is a cross-sectional view showing the water treatment device 2 according to the second embodiment, specifically, a cross-sectional view in the direction of the pipe axis of the water flow pipe 110 to be described later (hereinafter referred to as “tube axis direction”). FIG. 5 is another cross-sectional view showing the water treatment apparatus 2 according to the second embodiment, specifically, a cross-sectional view orthogonal to the tube axis of the water passage 110 described later. 4 and 5, the same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  The water treatment device 2 according to the second embodiment is different from the water treatment device 1 according to the first embodiment in that the start auxiliary unit 60 includes a window 61 instead of the light guide rod that is the daylighting unit.

  As shown in FIGS. 4 and 5, the water flow pipe 110 has a water flow part 111 whose outer diameter is cylindrical and whose inside is a cavity. Then, an inflow portion 112 and an outflow portion 113 are respectively provided at both ends of the peripheral wall 114 of the water passage portion 111 in the tube axis direction. In the example shown in FIGS. 4 and 5, the inflow portion 112 and the outflow portion 113 are protruded with their directions aligned. Here, the inflow part 112 and the outflow part 113 are formed in a hollow cylindrical shape, for example, and communicate with the inside of the water flow part 111. Moreover, the inflow part 112 and the outflow part 113 are connected with piping for inflow or outflow of water. That is, light does not enter the water conduit 110 from outside the water conduit 110 except for light incident from the start assisting unit 60.

  Here, as shown in FIG. 4, in the water treatment apparatus 2, the protective tube 30 covering the outer peripheral surfaces of the discharge lamp 20 and the bulb 21 thereof is arranged so that both end portions thereof protrude from both end surfaces of the water passage portion 110. May be. For example, in the water treatment device 2, portions of the plurality of discharge lamps 20 that supply electric power such as the caps described above may be disposed to protrude outside the water conduit 110. On the other hand, in the water treatment apparatus 2, a portion that emits ultraviolet rays such as the bulb 21 is disposed in the water conduit 110. That is, the water treatment device 2 suppresses ultraviolet rays from being radiated out of the water conduit 110. When the protective tube 30 is provided so as to cover the entire discharge lamp 20, the entire discharge lamp 20 may be disposed in the water tube 110.

  In the water treatment apparatus 2, the start assisting unit 60 includes a window 61 and a light source 62 as a daylighting unit. For the window 61, for example, a transparent resin such as an acrylic resin or a polycarbonate (PC) resin, or a glass such as quartz glass, soda glass, or borosilicate glass is used. Moreover, the starting auxiliary | assistant part 60 has the light bulb which comprised solid light emitting elements, such as LED, or a filament as the light source 62, for example.

  The window 61 of the start assisting unit 60 is a position at which light is emitted to at least one discharge lamp 22 (20) among the plurality of discharge lamps 20 from when the plurality of discharge lamps 20 are not lit until lighting is started. Placed in. The window 61 is a part of the peripheral wall 114 of the water passage portion 111 and is provided at a position where one discharge lamp 22 (20) can be irradiated with light. For example, the window 61 is formed by fitting a translucent member into an opening provided in a part of the peripheral wall 114 of the water passage portion 111 and fixing the same. That is, in the water treatment device 2, only the light that passes through the window 61 enters the water conduit 110.

  Here, in the example shown in FIGS. 4 and 5, the window 61 is a peripheral wall of the water flow portion 111 so that the distance from the one discharge lamp 22 (20) is shortened in a cross section orthogonal to the tube axis of the water flow tube 110. 114. Further, the window 61 is provided in the central portion in the pipe axis direction of the water flow pipe 110 in the peripheral wall 114 of the water flow part 111. As a result, during a period from when the plurality of discharge lamps 20 are not lit to when lighting is started, light that has passed through the window 61 and entered the water conduit 110 is efficiently irradiated to one discharge lamp 22 (20). To do. As shown in FIGS. 4 and 5, since the water treatment apparatus 2 is provided with the window 61 on the peripheral wall 114 of the water passage portion 111, the start assisting portion 60 is not easily affected by water pressure.

  The water treatment apparatus 2 according to the second embodiment having the above-described configuration includes the window 61 as a daylighting portion that does not transmit ultraviolet rays, so that the window 61 can prevent ultraviolet rays from being radiated out of the water pipe 110, and the water pipe. While the safety | security of the light which leaks out of 110 increases, the fall of the light quantity of the ultraviolet-ray in the water flow pipe 110 can be suppressed. In addition, the deterioration of the light source 62 due to the light source 62 being irradiated with ultraviolet light can be suppressed. The window 61 may contain a material that absorbs ultraviolet rays, such as zinc oxide, titanium oxide, indium tin oxide, and the like.

  In the water treatment device 2 according to the second embodiment having the above-described configuration, the start auxiliary unit 60 is in the vicinity of one discharge lamp 22 (20) of the plurality of discharge lamps 20 in the water conduit 110, and is at least one. By having a window 61 as a daylighting unit disposed at a position where light is emitted to one discharge lamp 22 (20), start-up assistance for one specific discharge lamp 22 (20) is performed. As a result, when the window 61 is arranged near the discharge lamp 20 and the light incident from the window 61 is irradiated onto one specific discharge lamp 22 (20), among the plurality of mounted discharge lamps 20, 1 Since the two discharge lamps 22 (20) are reliably started, the other discharge lamps 20 can serve as a starting aid by the light of the first one discharge lamp 22 (20). Thus, in the water treatment apparatus 2, if one discharge lamp 22 (20) is lit, the other discharge lamps 20 can be lit in a chain by electrons emitted from the discharge lamp 22 (20). I can expect.

  In the water treatment device 2 according to the second embodiment having the above-described configuration, the start assisting unit 60 includes a light bulb including a solid light emitting element or a filament as the light source 62, thereby starting the discharge lamp 20 without changing the start voltage. Sexual deterioration can be suppressed. Specifically, the light source 62 is preferably arranged so that more light is emitted from the light source 62 to a portion of the window 61 exposed outside the water conduit 110. By arranging in this way, the light emitted from the light source 62 can be made incident into the water conduit 110 through the window 61. Further, the light source 62 may be turned on only when the plurality of discharge lamps 20 are not lit or when lighting is started (for example, for several seconds), and may be turned off when the plurality of discharge lamps 20 are lit. The light source 62 is preferably a light source that can reliably emit light with low power, and specifically, a light bulb including a solid light emitting element or a filament.

  In addition, the start auxiliary | assistant part 60 may make natural light inject into the water pipe 110 with the window 61 which is a lighting part. In this case, the start assisting unit 60 may not have the light source 62. In this case, the water treatment device 2 can easily suppress the deterioration of the starting characteristics simply by providing the window 61 in the water conduit 110. In addition, by using a material that transmits visible light (blue to red) for the window 61, light necessary for generating electrons can be caused to enter the water pipe 110.

  Here, the water treatment apparatus 1 according to the first embodiment and the water treatment apparatus 2 according to the second embodiment are used for water treatment when the ballast water that is mounted on the ship and is held in the ship is discharged to the outside of the ship. May be. This point will be described with reference to FIG. FIG. 6 is a schematic diagram in which the water treatment apparatus 1 according to the first embodiment is mounted on a ship 70. In the example shown in FIG. 6, the ballast water in the ballast tank 71 of the ship 70 flows into the water treatment device 1 from the inflow portion 12 through the pipe 72 and is subjected to purification processing such as sterilization by ultraviolet rays. The treated ballast water is drained out of the ship 70 from the outflow portion 13 via the pipe 73. Thereby, the ballast water held in the ship 70 is subjected to purification treatment such as sterilization by the water treatment device 1 and discharged to the outside of the ship 70 as safer water.

  In addition, the water treatment apparatus 1 may be used at the time of the so-called purification process at the time of flooding in which ballast water is pumped into the ballast tank 71.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 1, 2 Water treatment apparatus 10,110 Water pipe 11,111 Water flow part 12,112 Inflow part 13,113 Outflow part 20 Discharge lamp 21 Valve 30 Protection pipe 40 Start auxiliary part 41 Light guide rod 42 Light source 60 Start auxiliary part 61 Window 62 light source

Claims (7)

A water pipe having a light-shielding property and passing water to be treated;
A plurality of discharge lamps arranged in the water pipe and emitting ultraviolet rays into the water pipe;
A starting auxiliary unit that irradiates at least one of the plurality of discharge lamps with light during a period from when the plurality of discharge lamps are not lit to when lighting is started;
A water treatment apparatus comprising: The water treatment apparatus according to claim 1, wherein the start assisting unit includes a daylighting unit that causes light outside the water conduit to enter the water conduit. The water treatment apparatus according to claim 2, wherein the start assisting unit includes the daylighting unit that does not transmit ultraviolet rays. The start-up auxiliary unit includes the daylighting unit arranged in the vicinity of one of the plurality of discharge lamps in the water pipe and at a position where at least one of the discharge lamps is irradiated with light. The water treatment apparatus of Claim 2 or Claim 3. The water treatment apparatus according to any one of claims 1 to 4, wherein the start-up auxiliary unit includes a light bulb including a solid light emitting element or a filament as a light source. The water treatment apparatus according to any one of claims 1 to 5, wherein the plurality of discharge lamps include medium-pressure ultraviolet lamps. The water treatment apparatus according to any one of claims 1 to 6, wherein the water treatment apparatus is used for water treatment when discharging ballast water that is mounted on a ship and held in the ship to the outside of the ship.

Images