JP2005040746A - Ultraviolet irradiation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultraviolet irradiation device capable of improving the treating capacity. <P>SOLUTION: The device is provided with flow passages 5, 19, 9 through which a fluid to be treated passes and a plurality of ultraviolet irradiation units 17 installed in the flow passage 19 to irradiate the fluid to be treated with ultraviolet rays. In the device, further, the ultraviolet irradiation units 17 is installed with ultraviolet lumps 31 in the state of extending in a direction crossing the flow of the fluid to be treated in the flow passage 19, and the flow passage 19 is installed with the plurality of ultraviolet irradiation units 17 in parallel in the flow direction of the fluid to be treated in the flow passage 19. In an ultraviolet irradiation part 7 in which the plurality of the ultraviolet irradiation units 17 are installed in the flow passage 19, the space between the adjacent ultraviolet irradiation units 17 is a throttling part 19c in which the width between wall surfaces in the direction along the extending direction of the ultraviolet lumps 31 in the flow passage 19 is narrowed, thereby accelerating uniformization of the amount of the ultraviolet irradiation which the fluid to be treated and objects to be irradiated in the fluid to be treated receive, and improving the treating capacity of the ultraviolet irradiation device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an ultraviolet irradiation device, and more particularly to an ultraviolet irradiation device that irradiates ultraviolet rays to a fluid to be processed flowing through a flow path.

  The ultraviolet irradiation device irradiates the fluid to be treated flowing through the flow path with ultraviolet rays, for example, to purify the fluid by killing microorganisms in the fluid to be treated, oxidative decomposition of organic matter, decomposition of other toxic substances, etc. Is what you do. As such an ultraviolet irradiation device, a configuration in which ultraviolet irradiation units are arranged side by side in the direction of the flow of the fluid to be processed flowing in the flow path in a rectangular parallelepiped or a cubic flow path through which the fluid to be processed flows. Is used. In the ultraviolet irradiation apparatus having such a configuration, the ultraviolet lamp included in the ultraviolet irradiation unit is installed in a state extending in a direction intersecting with the flow of the fluid to be processed in the flow path.

  By the way, in the ultraviolet irradiation device, the intensity of ultraviolet rays irradiated to the fluid to be treated changes depending on the position in the flow path with respect to the ultraviolet lamp, that is, the distance from the ultraviolet lamp. The ultraviolet intensity decreases as the distance from the ultraviolet lamp increases. Accordingly, the fluid to be treated has a portion that receives ultraviolet rays having a strength necessary for processing the fluid to be treated and a portion that cannot receive ultraviolet rays having a necessary strength depending on the position through which the fluid flows, that is, the distance from the ultraviolet lamp. . That is, for example, when microorganisms such as bacteria in the water to be treated are to be killed by ultraviolet rays, the amount of ultraviolet irradiation received is uneven depending on the position where the microorganisms accompanying the water to be treated pass through the ultraviolet lamp, Processing ability, in this case, killing ability may not be obtained.

  For this reason, there is a need for an ultraviolet irradiation apparatus that can make the amount of ultraviolet irradiation received by the fluid to be processed and the irradiation target in the fluid to be processed uniform as much as possible and improve the processing capability.

  The subject of this invention is improving the processing capability of an ultraviolet irradiation device.

  An ultraviolet irradiation device of the present invention includes a flow path through which a fluid to be processed flows, and a plurality of ultraviolet irradiation units that are installed in the flow path and irradiate ultraviolet rays to the fluid to be processed that flows through the flow path. The ultraviolet irradiation unit is provided with an ultraviolet lamp extending in a direction intersecting with the flow of the fluid to be processed in the flow path, and the ultraviolet irradiation unit includes a plurality of the ultraviolet irradiation units in the flow path. In an ultraviolet irradiation unit that is installed side by side in the direction of the flow of the processing fluid and a plurality of ultraviolet irradiation units are installed in the flow path, the direction along the extending direction of the ultraviolet lamp in the flow path between adjacent ultraviolet irradiation units The said subject is solved by setting it as the structure where the width | variety between the wall surfaces of this is narrow.

With such a configuration, the width between the wall surfaces in the direction along the extending direction of the ultraviolet lamp in the flow path between the adjacent ultraviolet irradiation units is narrowed, so that the flow through the ultraviolet irradiation unit is reduced. Stir mixing of the processing fluid is facilitated. Therefore, since the uniformization of the ultraviolet irradiation amount received by the fluid to be processed and the irradiation target in the fluid to be processed is promoted, the processing capability of the ultraviolet irradiation device can be improved.
Moreover, if it is set as the structure where the width | variety between the wall surfaces of the direction along the extension direction of the said ultraviolet lamp of a flow path is narrow in the exit part from an ultraviolet irradiation part, it will be located in the exit part side from a ultraviolet irradiation part. Since the stirring and mixing of the fluid to be processed around the ultraviolet irradiation unit can be further promoted, the processing capability of the ultraviolet irradiation apparatus can be further improved.

  Furthermore, the portion where the width between the wall surfaces in the direction along the extending direction of the ultraviolet lamp between the adjacent ultraviolet irradiation units is narrowed is the width between the wall surfaces in the direction along the extending direction of the ultraviolet lamp in the flow path. After gradually becoming narrower, the configuration is such that the shape gradually increases. With such a configuration, stirring and mixing of the fluid to be processed flowing through the flow path of the ultraviolet irradiation section can be further promoted.

  Moreover, in the ultraviolet irradiation part, it is set as the structure where the width | variety between the wall surfaces of the direction along the extension direction of the ultraviolet lamp of a flow path is narrower than the width | variety of parts other than an ultraviolet irradiation part. With such a configuration, the distance to the fluid to be processed that flows through the position farthest from the ultraviolet lamp can be shortened.

  Furthermore, the ultraviolet irradiation unit is provided with a plurality of ultraviolet lamps in a circular shape, and the ultraviolet irradiation unit has a wall surface along the extending direction of the ultraviolet lamp in the flow path, except for an entrance portion to the ultraviolet irradiation unit. If the configuration is formed in an arc shape corresponding to the cylindrical outer shape of the ultraviolet irradiation unit, the distance to the processing fluid flowing through the position farthest from the ultraviolet lamp can be shortened, and the processing fluid can be stirred. Since the mixing can be further promoted, the processing capability of the ultraviolet irradiation device can be further improved.

  According to the present invention, the processing capability of the ultraviolet irradiation device can be improved.

  Hereinafter, an embodiment of an ultraviolet irradiation apparatus to which the present invention is applied will be described with reference to FIGS. FIG. 1 is a perspective view showing a schematic configuration of an ultraviolet irradiation apparatus to which the present invention is applied. FIG. 2 is an enlarged horizontal sectional view showing a portion of an ultraviolet irradiation portion of an ultraviolet irradiation apparatus to which the present invention is applied. FIG. 3 is a side view showing a schematic configuration of a part of an ultraviolet irradiation unit of an ultraviolet irradiation apparatus to which the present invention is applied. FIG. 4 is a horizontal cross-sectional view showing an enlarged portion of the ultraviolet irradiation section of the ultraviolet irradiation apparatus to which the present invention is applied. In this embodiment, the fluid to be treated is water, and an ultraviolet irradiation device for killing bacteria in the water, for example, Escherichia coli will be described as an example.

  As shown in FIG. 1, the ultraviolet irradiation device 1 of the present embodiment has a groove-like open channel type treated water channel having an open top. In the present embodiment, two ultraviolet irradiation devices 1 having the same configuration are provided for a flow path 3 having a rectangular cross section through which one water to be treated flows. The ultraviolet irradiation device 1 is provided with an introduction water channel part 5, an ultraviolet irradiation part 7, an outlet water channel part 9, and an overflow trough 11 in this order from the upstream side with respect to the flow of water to be treated. These inlet channel part 5, ultraviolet irradiation part 7, lead-out channel part 9, and overflow trough 11 are arranged in a straight line, and form a channel shape of an open channel type treated water having an upper opening. ing.

  The introduction water channel portion 5 is a flow channel having the same rectangular cross section as the flow channel 3 for guiding the water to be treated to the ultraviolet irradiation unit 7, and flows in a state extending at right angles to the extending direction in the flow channel 3. Connected to the road 3. A flat plate rectifying plate 13 in which a plurality of through holes 13a are formed in a lattice shape is installed at a portion where the introduction water channel portion 5 is connected to the flow channel 3 so as to vertically block the flow channel. As shown in FIGS. 1 and 2, the ultraviolet irradiation unit 7 includes a channel width adjusting member 15 installed on each side wall 14 side in order to change the width between the opposing side walls 14 of the channel having a rectangular cross section, It is composed of two ultraviolet irradiation units 17 installed between the wall surfaces formed by the road width adjusting member 15.

  The channel width adjusting member 15 is formed by bending a material having corrosion resistance, for example, a plate such as stainless steel into a desired shape. And by installing a pair of flow path width adjusting members 15 formed symmetrically on both side walls of the flow path in a symmetrical state, the shape of the flow path 19 of the fluid to be treated in the ultraviolet irradiation unit 7, Make the width the desired shape. As shown in FIGS. 2 and 3, the ultraviolet irradiation unit 17 has a support frame 23 that supports the ultraviolet transmission tubes 21 arranged at equal intervals on the circumference, dirt attached to the outer surface of the ultraviolet transmission tubes 21, and the like. The wiper 25 includes a wiper 25 for wiping, a motor 27 for driving the wiper 25, and a rotary shaft 29 connected to the shaft of the motor 27.

  The ultraviolet transmissive tube 21 is a straight tubular tube made of a material that transmits ultraviolet rays, for example, quartz glass or Teflon (registered trademark). For example, a U-shaped or a plurality of straight tubular ultraviolet lamps 31 are inserted into a watertight tube. Sealed. The lower end portion of the ultraviolet ray transmitting tube 21 is watertightly closed with a substantially disc-shaped seal cap 32 formed of a material such as a synthetic resin which is not easily affected by ultraviolet rays. A lower lamp support member 33 that supports the lower end of the ultraviolet lamp 31 is installed at the lower end of the ultraviolet transmission tube 21 closed by the seal cap 32. When the ultraviolet lamp 31 is U-shaped, the base of the ultraviolet lamp 31 is inserted into a socket fixed to the upper lamp support member 35 located on the upper end side of the ultraviolet transmission tube 21. The lower lamp support member 33 and the upper lamp support member 35 are made of a material such as a metal or a synthetic resin that is not easily affected by ultraviolet rays.

  The upper end portion of the ultraviolet transmissive tube 21 is water-tightly closed with a substantially disc-shaped seal cap 37 formed of a material such as a synthetic resin that is not easily affected by ultraviolet rays. The wiring 39 from the upper lamp support member 35 is inserted into the seal cap 37 in a watertight manner, whereby the wiring 39 is guided to the outside of the ultraviolet ray transmitting tube 21. The wiring 39 is connected to an ultraviolet lamp lighting means including a ballast and a power source (not shown).

  The support frame 23 is made of an anticorrosive material, for example, a metal such as stainless steel or aluminum, or a synthetic resin, and supports the substantially flat plate-like pedestal portion 23a and the flat plate-like upper end portion of the ultraviolet ray transmitting tube 21. And a disk-shaped support plate 23b, and at least two support rods 23c provided between the pedestal portion 23a and the support plate 23b. The lower end part of the ultraviolet transmissive tube 21 is attached to the upper surface of the pedestal part 23a. A through-hole having the same diameter as the outer diameter of the ultraviolet transmissive tube 21 is formed in the support plate 23b at a position corresponding to the installation position of the ultraviolet transmissive tube 21.

  The support frame 5 of the present embodiment supports seven ultraviolet transmissive tubes 21, and the support plate 23b has seven through holes formed at equal intervals so as to surround the center of the support plate 23b. . The pedestal portion 23a is provided with a support portion to which the lower end portion of the ultraviolet ray transmitting tube 21 is attached at a position corresponding to the seven through holes formed in the support plate 23b. The support bar 23c is installed outside the ultraviolet transmission tube 21.

  The motor 27 is attached to the center of the upper surface of the support plate 23b. The rotating shaft 29 connected to the shaft of the motor 27 is inserted into a through hole formed at the center of the support plate 23b, and the end of the rotating shaft 29 is rotated by a foot bearing 23d provided at the center of the pedestal portion 23a. It is supported freely. Although not shown, the outer surface of the rotating shaft 29 is threaded. The wiper 25 is formed of an anticorrosive material, an anticorrosive material, such as stainless steel or Teflon (registered trademark), and has a cylindrical nut portion 25a and a nut portion 25a that are screwed into the thread of the rotary shaft 29. The ring-shaped portion 25b is fixed and has a hole having the same diameter as the outer diameter of the ultraviolet ray transmitting tube 21. The ring-shaped portion 25b is fixed to the ring-shaped portion 25b, and a cylindrical portion 25c through which the support rod 23 is inserted. The wiper 25 can be formed integrally with a nut portion 25a, a ring-shaped portion 25b, a cylindrical portion 25c, etc., or a nut portion 25a, a ring-shaped portion 25b, and a cylindrical portion formed of different materials. 25c and the like can be connected.

  As shown in FIG. 1 and FIG. 2, such an external column-shaped ultraviolet irradiation unit 17 is sandwiched between the flow channel width adjusting members 15 and is placed vertically on the channel 19 of the ultraviolet irradiation unit 7. is set up. The several ultraviolet irradiation unit 17 is installed in the state located in a line with the direction of the flow of to-be-processed water. For example, in the case of FIG. 2, the two ultraviolet irradiation units 17 are installed in a state of being aligned in the direction of the water to be treated. In addition, the ultraviolet irradiation unit 17 is installed in the flow path 19 of the ultraviolet irradiation unit 7 in a state where the ultraviolet irradiation unit 17 stands vertically, that is, in a state where the ultraviolet lamp 31 and the ultraviolet transmission tube 21 extend in the vertical direction. For this reason, the extending direction of the ultraviolet lamp 31 and the ultraviolet transmissive tube 21 is a direction intersecting the flow of the water to be treated.

  The flow path 19 of the ultraviolet irradiation unit 7 formed by the flow path width adjusting member 15 is an extension of the ultraviolet lamp 31 and the ultraviolet transmission tube 21 of the ultraviolet irradiation unit 17 at the inlet portion 19a of the water to be treated from the introduction water channel 5. The width in the direction along the existing direction is a width in which the ultraviolet irradiation unit 17 can be installed and is narrower than the introduction water channel portion 5, and the opposing wall surfaces formed by the channel width adjusting member 15 are parallel to each other. It has become. Further, a wall surface 19b perpendicular to the surface of the side wall 14 forms the inlet portion 19a between the end of the inlet portion 19a of the flow path 19 of the ultraviolet irradiation unit 7 and the side wall 14 of the introduction water channel portion 5. It is formed by the surface portion of the flow path width adjusting member 15 that is bent perpendicularly to the surface.

  Furthermore, the flow path 19 of the ultraviolet irradiation unit 7 formed by the flow path width adjusting member 15 is disposed between the ultraviolet irradiation units 17 arranged side by side along the flow of the water to be treated. The width in the direction along the extending direction of the lamp 31 and the ultraviolet transmissive tube 21 is narrower than the width of the inlet portion 19 a of the flow path 19 of the ultraviolet irradiation unit 7 and narrower than the outer diameter of the ultraviolet irradiation unit 17. It is an aperture portion 19c. A wall surface portion formed by the channel width adjusting member 15 between the inlet portion 19 a and the throttle portion 19 c of the channel 19 of the ultraviolet irradiation unit 7 is formed in an arc shape along the outer shape of the ultraviolet irradiation unit 17. .

  On the other hand, the outlet portion 19d of the water to be treated to the outlet water passage portion 9 of the flow passage 19 of the ultraviolet irradiation portion 7 formed by the flow passage width adjusting member 15 is an ultraviolet lamp of the ultraviolet irradiation unit 17 like the throttle portion 19c. 31 and the width along the direction in which the ultraviolet transmissive tube 21 extends are narrower than the width of the inlet portion 19 a of the flow path 19 of the ultraviolet irradiation unit 7 and smaller than the outer diameter of the ultraviolet irradiation unit 17. . The wall surface portion formed by the channel width adjusting member 15 between the narrowed portion 19 c and the outlet portion 19 d of the channel 19 of the ultraviolet irradiation unit 7 is formed in a semicircular arc shape along the outer shape of the ultraviolet irradiation unit 17. ing. Therefore, the portion of the flow path 19 of the ultraviolet irradiation unit 7 where the ultraviolet irradiation unit 17 located on the downstream side with respect to the flow of the water to be treated is disposed on the wall surface formed by the flow path width adjusting member 15. A substantially cylindrical space into which the unit 17 can be inserted is formed.

  In addition, a wall surface 19e perpendicular to the surface of the side wall 14 forms the outlet portion 19d between the end of the outlet portion 19d of the flow path 19 of the ultraviolet irradiation unit 7 and the side wall 14 of the outlet water channel portion 9. It is formed by the surface portion of the flow path width adjusting member 15 that is bent perpendicularly.

  Thus, after the width between the wall surfaces in the direction along the extending direction of the ultraviolet lamp 31 and the ultraviolet ray transmitting tube 21 gradually narrows toward the narrowed portion 19c, the flow path 19 gradually expands from the narrowed portion 19c. It has a shape to go. In FIG. 2, the surface portions of the flow path width adjusting member 15 forming the throttle portion 19c and the outlet portion 19d are formed in a state of facing each other in parallel.

  As shown in FIG. 1, the lead-out water channel portion 9 is a flow channel for guiding the water to be treated that has been subjected to the ultraviolet ray irradiation treatment by the ultraviolet ray irradiation unit 7, and is formed by the same side wall 14 that forms the introduction water channel portion 5. It is formed in a rectangular cross section. The overflow trough 11 is provided in the most downstream portion of the ultraviolet treatment device 1 connected to the outlet water channel portion 9, is formed along the flow direction of the water to be treated, and is parallel to a comb shape whose bottom is higher than that of the outlet water channel portion 9. Has a plurality of grooves 11a and 11b. The groove 11a of the overflow trough 11 has an end on the inflow side of the treated water on the outlet water channel 9 side closed and an end on the outflow side of the treated water opened, and the groove 11b is formed on the outlet water channel portion. The end on the inflow side of the 9th to-be-treated water is opened, and the end on the outflow side of the to-be-treated water is closed. Such overflow grooves 11 a and grooves 11 b are alternately provided in the overflow trough 11. The treated water that has been subjected to the ultraviolet irradiation treatment flows into the groove 11b from the outlet water channel portion 9, and then flows into the groove 11a that is open at the end on the outflow side of the treated water, and from the groove 11a to the outside of the ultraviolet irradiation device 1. leak.

  The operation of the ultraviolet irradiation apparatus 1 having such a configuration and the features of the present invention will be described. In the ultraviolet irradiation device 1 of the present embodiment, the water to be treated flows from the flow path 3 into the introduction flow path portion 5 through the rectifying plate 13. The water to be treated that has flowed into the introduction flow path unit 5 is guided to the ultraviolet irradiation unit 7 and is irradiated with ultraviolet rays from the ultraviolet irradiation unit 17 while flowing through the flow channel 19 of the ultraviolet irradiation unit 7. At this time, the water to be treated which has flowed from the inlet portion 19a of the flow path 19 of the ultraviolet irradiation unit 7 flows through the portion of the ultraviolet irradiation unit 17 installed on the upstream side with respect to the flow of the water to be treated. When the air travels toward the narrowed portion 19c of the flow path 19 where the flow becomes narrow, the flow converges on the central portion of the flow path 19. Therefore, the water to be treated collides with the ultraviolet transmission tube 21 of the ultraviolet irradiation unit 17 installed on the upstream side, and converges on the central portion of the flow path 19 as it goes toward the throttle portion 19 c of the flow path 19. This facilitates stirring and mixing of the water to be treated in the ultraviolet irradiation unit 17 installed on the upstream side of the flow path 19.

  Furthermore, the water to be treated that has passed through the narrowed portion 19 c of the flow path 19 is in a state of expanding toward the wall surface of the flow path 19 as the width of the flow path 19 increases. Therefore, the water to be treated collides with the ultraviolet ray transmission tube 21 of the ultraviolet irradiation unit 17 installed on the downstream side of the throttle portion 19c of the flow path 19 and the wall surface of the counter flow path 19 from the throttle portion 19c of the flow path 19. By expanding toward, the stirring and mixing of the water to be treated in the ultraviolet irradiation unit 17 portion installed on the downstream side of the flow path 19 is promoted.

  Thus, in the ultraviolet irradiation device 1 of the present embodiment, the flow path 19 of the fluid to be processed of the ultraviolet irradiation unit 7 in which the ultraviolet irradiation unit 17 is installed is in a direction along the extending direction of the ultraviolet lamp 31 and the ultraviolet transmission tube 21. Is narrowed at the narrowed portion 19c of the flow path 19 of the adjacent ultraviolet irradiation unit 7. For this reason, when the to-be-processed water which flows through the flow path 19 of the ultraviolet irradiation part 7 collides with the ultraviolet irradiation unit 17 of an upstream side and a downstream, the to-be-processed water converges toward the aperture | diaphragm | squeeze part 19c of the flow path 19. In addition, agitation and mixing in the horizontal direction of the fluid to be treated are promoted in combination with expansion after passing. Therefore, the uniformity of the amount of ultraviolet irradiation received by the fluid to be processed and the irradiation target in the fluid to be processed is promoted, and the processing capability of the ultraviolet irradiation apparatus can be improved.

  Furthermore, in this embodiment, the width between the wall surfaces in the direction along the extending direction of the ultraviolet lamp 31 and the ultraviolet transmissive tube 21 of the flow path 19 is also narrowed at the outlet portion 19 d of the flow path 19 of the ultraviolet irradiation unit 7. . Accordingly, since the stirring and mixing of the fluid to be processed around the ultraviolet irradiation unit 17 installed on the outlet portion 19d side of the flow path 19 is further promoted, the processing capability of the ultraviolet irradiation apparatus can be further improved. In addition, the width between the wall surfaces of the flow path 19 along the extending direction of the ultraviolet lamp 31 and the ultraviolet transmissive tube 21 is gradually narrowed toward the throttle portion 19c in the vicinity of the upstream side of the throttle portion 19c. In the vicinity of the downstream side of the throttle portion 19c, the shape gradually increases as the distance from the throttle portion 19c increases. For this reason, convergence and expansion of the flow of the fluid to be processed can be more efficiently performed, and stirring and mixing of the fluid to be processed flowing through the flow path of the ultraviolet irradiation unit can be further promoted.

  Furthermore, in the present embodiment, the width between the wall surfaces of the flow path 19 of the ultraviolet irradiation unit 7 in the direction along the extending direction of the ultraviolet lamp is narrower than the widths of the introduction flow path unit 5 and the discharge flow path unit 9. ing. For this reason, the distance to the to-be-processed water or the microbial cells flowing through the position farthest from the ultraviolet lamp is shortened, and the treatment capability of the ultraviolet irradiation device can be further improved.

  Further, in the ultraviolet irradiation unit 17 of the present embodiment, an ultraviolet transmission tube 21 in which a plurality of ultraviolet lamps 31 are inserted is arranged in a circular shape, and the ultraviolet irradiation unit 7 has a flow path 19 of the ultraviolet irradiation unit 7. Except for the inlet portion 19a, the wall surface of the flow path 19 along the extending direction of the ultraviolet lamp 31 and the ultraviolet transmission tube 21 is formed in an arc shape corresponding to the outer shape of the ultraviolet irradiation unit 17, and the shape of the flow path 19 is substantially cylindrical. It has become. For this reason, since the distance to the to-be-processed water and microbial cells which flow through the position farthest from the ultraviolet lamp 21 in the flow path 19 can be shortened, and furthermore, the stirring and mixing of the to-be-treated water can be further promoted, the ultraviolet irradiation device The processing capacity can be further improved.

  In the present embodiment, the two ultraviolet irradiation units 17 are installed side by side along the flow of the water to be treated. However, the number of the ultraviolet irradiation units 17 can be selected as appropriate. For example, as shown in FIG. 4, a configuration in which three ultraviolet irradiation units 17 are installed side by side along the flow of the water to be treated may be employed. At this time, the narrowed portions 19c of the flow path 19 of the ultraviolet irradiation unit 7 are formed in two places. In addition, since the stirring and mixing of the water to be treated is promoted as the number of the narrowed portions 19c of the flow path 19 of the ultraviolet irradiation unit 7 increases, the processing capacity required for the ultraviolet irradiation apparatus, the size of the installation place, and the cost are increased. However, it is desirable that the number of ultraviolet irradiation units installed and the number of throttle portions 19c of the flow path 19 of the ultraviolet irradiation unit 7 be as large as possible in order to improve the processing capability.

  Moreover, in this embodiment, the surface part of the flow-path width adjusting member 15 which forms the aperture | diaphragm | squeeze part 19c and the exit part 19d of the flow path 19 of the ultraviolet irradiation part 7 is formed in the state facing in parallel. However, the narrowed portion 19c and the outlet portion 19d of the flow path 19 of the ultraviolet irradiation unit 7 are narrowed if the width between the wall surfaces in the direction along the extending direction of the ultraviolet lamp 31 and the ultraviolet transmitting tube 21 is narrow. The surface portion of the flow path width adjusting member 15 that forms the outlet portion 19d does not need to be formed in parallel with each other. For example, the wall surface as shown in FIG. 4 may be bent. it can.

  In the present embodiment, the surface portion of the flow path width adjusting member 15 connected to the narrowed portion 19c of the flow path 19 of the ultraviolet irradiation unit 7 is formed in an arc shape, but has a linear shape as shown in FIG. As a surface, the width of the flow path 19 of the ultraviolet irradiation unit 7 may be gradually reduced and expanded on the upstream side and the downstream side of the narrowed portion 19c of the flow path 19 of the ultraviolet irradiation unit 7. Further, the narrowed portion 19c and the outlet portion 19d of the flow path 19 of the ultraviolet irradiating unit 7 have an ultraviolet irradiating unit as long as the width between the wall surfaces in the direction along the extending direction of the ultraviolet lamp 31 and the ultraviolet transmitting tube 21 is narrow. The width of the flow path 19 of the ultraviolet irradiation unit 7 may be gradually reduced or enlarged in an arc shape or a straight line on the upstream side and the downstream side of the throttle portion 19c of the 7 flow path 19. However, on the upstream side and the downstream side of the narrowed portion 19c of the flow path 19 of the ultraviolet irradiation unit 7, it is preferable that the width of the flow path 19 of the ultraviolet irradiation unit 7 be gradually reduced and expanded in an arc shape or a linear shape. This is desirable because the stirring and mixing of the water to be treated can be further promoted.

  Further, the present invention is not limited to the configuration of the flow path of the ultraviolet irradiation device 1 of the present embodiment, the configuration of the ultraviolet irradiation unit 17 used in the present embodiment, and the like. As long as the ultraviolet lamp and the ultraviolet transmission tube of the irradiation unit extend and the ultraviolet irradiation units are arranged side by side along the direction of the flow of the fluid to be processed, it can be applied to ultraviolet irradiation apparatuses having various configurations. In addition, according to the present invention, the fluid to be treated as in the present embodiment is water, and the present invention is not limited to an ultraviolet irradiation device for killing bacteria in the water, for example, E. coli. Can be applied to various ultraviolet irradiation apparatuses for processing for various purposes.

It is a perspective view which shows schematic structure of one Embodiment of the ultraviolet irradiation device to which this invention is applied. It is sectional drawing in the horizontal direction which expands and shows the part of the ultraviolet irradiation part of one Embodiment of the ultraviolet irradiation device which applies this invention. It is a side view which shows schematic structure of the part of the ultraviolet irradiation unit in one Embodiment of the ultraviolet irradiation device which applies this invention. It is sectional drawing in the horizontal direction which expands and shows the part of the ultraviolet irradiation part of one Embodiment of the ultraviolet irradiation device which applies this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ultraviolet irradiation apparatus 5 Introductory water channel part 7 Ultraviolet irradiation part 9 Derived water channel part 15 Channel width adjustment member 19 Channel 19a Inlet part 19c Restriction part 19d Outlet part 21 Ultraviolet transmission pipe 31 Ultraviolet lamp

Claims (4)

A flow path through which the fluid to be processed flows, and a plurality of ultraviolet irradiation units that are installed in the flow path and irradiate ultraviolet rays to the fluid to be processed that flows through the flow path. The ultraviolet lamp is installed in a state extending in a direction intersecting with the flow of the fluid to be processed in the flow path, and a plurality of the ultraviolet irradiation units are arranged in the flow path of the flow of the fluid to be processed in the flow path. In the ultraviolet irradiation section in which the plurality of ultraviolet irradiation units are installed in the direction and the plurality of ultraviolet irradiation units are installed in the flow path, the direction along the extending direction of the ultraviolet lamp in the flow path between the adjacent ultraviolet irradiation units UV irradiation device with a narrow width between the wall surfaces. 2. The ultraviolet irradiation device according to claim 1, wherein a width between wall surfaces in a direction along an extending direction of the ultraviolet lamp of the flow path is narrowed at an exit portion from the ultraviolet irradiation unit. The portion where the width between the wall surfaces in the direction along the extending direction of the ultraviolet lamp is narrowed between the adjacent ultraviolet irradiation units is between the wall surfaces in the direction along the extending direction of the ultraviolet lamp in the channel. 3. The ultraviolet irradiation apparatus according to claim 1, wherein the ultraviolet irradiation device has a shape that gradually increases after the width is gradually narrowed. In the ultraviolet irradiation unit, a plurality of the ultraviolet lamps are arranged in a circular shape, and the ultraviolet irradiation unit, except for an entrance portion to the ultraviolet irradiation unit, extends in the direction in which the ultraviolet lamp extends in the flow path. The ultraviolet irradiation apparatus according to any one of claims 1 to 3, wherein a wall surface along the line is formed in an arc shape corresponding to a cylindrical outer shape of the ultraviolet irradiation unit.

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