JP6244080B2 - UV irradiation equipment - Google Patents

Description

  The present invention relates to an ultraviolet irradiation device, and more particularly to an ultraviolet irradiation device that irradiates ultraviolet rays from outside a tube through which a fluid flows.

  2. Description of the Related Art Conventionally, there are known ultraviolet irradiation apparatuses that are used for irradiating a fluid with ultraviolet rays, inactivating bacteria and viruses in the fluid, decomposing harmful substances in the fluid, and the like.

  For example, in Patent Document 1, a tube having ultraviolet transparency is spirally wound in a housing, an ultraviolet lamp is disposed inside the spiral, and a fluid is allowed to flow through the tube. A so-called external illumination type ultraviolet irradiation device that irradiates ultraviolet rays has been proposed. In particular, in this document, when a tube made of polytetrafluoroethylene having a high ultraviolet transmittance is arranged in a spiral shape, a part of the ultraviolet ray emitted from the ultraviolet lamp is directly absorbed by the irradiated fluid in the spirally wound tube. The remainder is repeatedly reflected between the tubes and gradually absorbed by the fluid, so that the utilization efficiency of ultraviolet rays can be improved. Such an externally-illuminated UV irradiation device with a spirally wound tube reduces the tube diameter and the fluid is stirred by the helix, effectively irradiating UV light even to fluids with low transmittance it can.

JP 2004-66045 A

  However, according to Patent Document 1, there are the following problems. That is, when irradiating a fluid having a low transmittance of ultraviolet rays with ultraviolet rays, it is preferable to reduce the thickness of the tube in order to increase the irradiation amount of ultraviolet rays. However, if the tube thickness is reduced, the rigidity and pressure resistance of the tube will decrease, so the tube may vibrate due to the impact of a water hammer or the like generated by the flow of fluid, and the tube or UV lamp may be damaged by the vibration of the tube. There is.

  In order to solve such a problem, it is desirable to firmly support and fix the spirally wound UV-transmitting tube. For example, a method is conceivable in which the tube is sandwiched and fixed by a belt-like support member disposed inside and outside the spiral, or the tube is fixed to the support member with a band by applying the belt-like support member to the spiral of the tube. . However, these methods have a problem that the irradiation of ultraviolet rays to the fluid to be irradiated is reduced because the irradiation of the ultraviolet rays is blocked by the support member.

The problem to be solved by the present invention is that the thickness of a spirally wound tube that circulates the fluid to be irradiated can be reduced, and can be firmly supported and fixed without blocking ultraviolet irradiation, and the irradiation with low ultraviolet transmittance is low. An object of the present invention is to provide an ultraviolet irradiation device suitable for use in a fluid .

To solve the above problems, an ultraviolet irradiation apparatus of the present invention is supported wound spirally on the outer peripheral surface of the supporting lifting pipe made of fluorocarbon resin tube having a UV transparent is formed of a metal, tubing A plurality of ultraviolet lamps are disposed outside the support pipe apart from the support pipe, and a housing for supporting the support pipe and surrounding the plurality of ultraviolet lamps is provided, and fluid is passed through the tube to irradiate ultraviolet rays. And

That is, the tube is supported and fixed on the outer peripheral surface of the support pipe made of metal, and a plurality of ultraviolet lamps are arranged outside the support pipe. It can be made thinner to increase the UV transmittance of the tube. Further, since the tube is resistant to internal pressure, the thickness of the tube can be set so that it can withstand the required internal pressure. On the other hand, since the tube is wrapped around and supported by a metal support pipe , the tube can be firmly supported and fixed , preventing the tube from damaging the tube and the UV lamp around the tube. it can.

Furthermore, since the tube is spirally wound around the outer periphery of the support pipe made of metal and the tube is supported and fixed, ultraviolet rays emitted from the ultraviolet lamp can be obtained by placing an ultraviolet lamp outside the spiral of the tube. Is not blocked by the support member of the tube, the amount of ultraviolet irradiation is not reduced.

As described above, according to the present invention, it is possible to realize an ultraviolet irradiation device that targets a fluid having a low ultraviolet transmittance as an irradiation target.

Moreover, it is preferable to reflect an ultraviolet-ray in the outer peripheral surface of the support pipe around which a spiral tube is wound. According to this, the ultraviolet rays that have passed through the tube and the fluid to be irradiated and the ultraviolet rays that have passed through the gap between the tubes are reflected by the outer peripheral surface of the cylindrical body, and again irradiate the irradiated fluid that circulates in the tube. Efficiency can be improved. In this case, the support pipe can be formed of a metal having ultraviolet reflectivity. Alternatively, the reflective film can be formed of a metal having ultraviolet reflectivity on the outer peripheral surface of the support pipe formed of metal . For example, when the support pipe and the reflection film are made of metal, it is preferable to use aluminum having high ultraviolet reflectance, for example, aluminum having a purity of 90% or more.

In addition, the temperature of the tube and the fluid to be irradiated in the tube may increase due to the irradiation of ultraviolet rays, and the tube and the fluid may be deteriorated. In such a case, it is preferable that the support pipe is formed of a material having high thermal conductivity, and the refrigerant is passed through the support pipe to cool the tube and the irradiated fluid.

  On the other hand, when measuring the amount of ultraviolet irradiation, an ultraviolet illuminance meter that can measure the illuminance of multiple ultraviolet lamps is placed in the support cylinder, and an opening is formed in the cylindrical wall of the support cylinder at a position corresponding to the multiple ultraviolet lamps. Form. According to this, it is possible to measure the illuminance of ultraviolet rays that have passed through the tube and the fluid to be irradiated and entered the cylindrical body.

  In addition, a reflective film can be formed of aluminum or the like on the inner surface of the casing to reflect ultraviolet rays within the casing. According to this, since the ultraviolet rays removed from the tube are reflected by the reflection film and irradiated onto the tube, the utilization efficiency of the ultraviolet rays can be improved.

According to the present invention, the thickness of the spirally wound tube that circulates the irradiated fluid can be reduced, and the tube can be firmly supported and blocked without blocking the ultraviolet irradiation, and used for the irradiated fluid having a low ultraviolet transmittance. It is possible to provide a suitable ultraviolet irradiation apparatus .

It is a sectional side view of the ultraviolet irradiation device of Embodiment 1 of the present invention. It is an enlarged view of the part of the frame 1 of FIG. It is sectional drawing of line AA of FIG. It is sectional drawing of line BB of FIG. It is a conceptual diagram of the ultraviolet irradiation device of Embodiment 1 of the present invention. It is a conceptual diagram of the ultraviolet irradiation device of Embodiment 2 of the present invention. It is a conceptual diagram of the ultraviolet irradiation device of Embodiment 3 of the present invention. It is a conceptual diagram of the ultraviolet irradiation device of Embodiment 4 of the present invention.

Hereinafter, the present invention will be described based on embodiments.
(Embodiment 1)
As shown in FIGS. 1-5, the ultraviolet irradiation device of Embodiment 1 arrange | positions an ultraviolet lamp out of the tube which is a flow path through which the to-be-irradiated fluid which is the irradiation object of ultraviolet rays flows, and from the outside of a flow path This is a so-called external illumination type ultraviolet irradiation device that irradiates ultraviolet rays. In the ultraviolet irradiation device, a tube 3 having ultraviolet transparency is spirally wound around the outer peripheral surface of a support pipe 5 that is a cylindrical body, and a plurality of ultraviolet lamps 7 are arranged around the axis of the support pipe 5 away from the tube 3. An inner case 9 that supports the support pipe 5 and surrounds the plurality of ultraviolet lamps 7 and an outer case 11 that covers the inner case 9 are provided, and ultraviolet rays from the ultraviolet lamp 7 are applied to the irradiated fluid that flows through the tube 3. It comes to irradiate.

  The tube 3 is, for example, a coil tube formed by spirally winding a tube formed of a fluororesin into a hollow cylinder, and is a flow path through which a fluid to be irradiated flows. One end side of the tube 3 is connected to an inflow pipe for the irradiated fluid (not shown), and the other end side is connected to an outflow pipe for the irradiated fluid. As the fluororesin used for the tube 3, for example, FEP (tetrafluoroethylene / hexafluoropropylene copolymer resin), PFA (tetrafluoroethylene), PTFE (polytetrafluoroethylene), or the like can be used. ,

  The support pipe 5 is formed into a hollow cylinder from metal, for example, aluminum, and the tube 3 is wound around the outer peripheral surface in a spiral shape to be supported and fixed. The support pipe 5 is laid down and is supported by the inner case 9 by a hook 13 described later.

  The plurality of ultraviolet lamps 7 are arranged away from the tube 3 and around the axis of the support pipe 5, for example, at equal intervals. Each ultraviolet lamp 7 is, for example, a straight tubular ultraviolet lamp 7 having bases 15 formed at both ends, and is turned on or off by connecting each base 15 to a socket 16.

  The inner case 9 is formed in a box shape and can accommodate the tube 3, the support pipe 5 and the ultraviolet lamp 7. The inner case 9 is formed of a reflector such as aluminum that reflects ultraviolet rays. Thereby, the ultraviolet rays irradiated from the plurality of ultraviolet lamps 7 are repeatedly reflected in the inner case 9 and irradiated to the tube 3. The inner case 9 is provided with a pair of hooks 13 that support the support pipe 5. Each hook 13 is formed in an L-shape that is suspended from the inner surface of the inner case 9 and bent in the horizontal direction. The horizontal portion of each hook 13 is inserted into the support pipe 5 and supports the support pipe 5. Thus, the extending direction of the support pipe 5 can be supported in the inner case 9 so as to coincide with the horizontal direction. Plate members 18 are supported at both ends of the inner case 9. The plate member 18 has an opening in which the tube 3 protruding from the end of the support pipe 5 is inserted and supported. A hole corresponding to the diameter of the tube 3 is formed in the inner wall of the plate member 18 so that the tube 3 can be pulled out from the inner wall of the plate member 18.

  The outer case 11 is formed in a box shape corresponding to the inner case 9 and covers the inner case 9. The wall of the outer case 11 is formed with an intake port 17 for sucking outside air and an exhaust port 19 for discharging the air inside the outer case 11 to the outside. The intake port 17 is provided with a filter, and the exhaust port 19 is provided with a fan. Thereby, after air outside the outer case 11 is clarified through a filter, the air is passed through the outer case 11 to cool the inside of the device, and the temperature of the device is prevented from rising.

  The operation of the ultraviolet irradiation device 1 of the present embodiment formed in this way will be described. Here, the irradiated fluid having a low ultraviolet transmittance is, for example, the supernatant liquid of an activated sludge tank used for the treatment of livestock excreta, and the supernatant liquid is irradiated with ultraviolet rays so that viruses in the supernatant liquid are not removed. A case where the activation process is performed will be described as an example. For easy understanding, the irradiated fluid before ultraviolet irradiation is sometimes referred to as raw water, and the irradiated fluid irradiated with a set amount of ultraviolet rays is sometimes referred to as treated water.

  In the state where the plurality of ultraviolet lamps 7 are lit, the supernatant liquid (raw water) flows into the tube 3 through an inflow pipe from an activated sludge tank (not shown). The raw water that has flowed into the tube 3 flows from the outer case 11 into the inner case 9 and is guided into the spirally wound tube 3. The raw water flowing through the spiral tube 3 is irradiated with ultraviolet rays from the plurality of ultraviolet lamps 7. At this time, in order to increase the ultraviolet transmittance of the tube 3, if the tube 3 is thinly formed within a range in which the tube 3 can withstand the internal pressure, the tube 3 is vibrated by an impact caused by the flow of raw water, and the tube 3 is damaged. There is a fear. However, in the present embodiment, the tube 3 does not move because the tube 3 is supported and fixed to the support pipe 5 so as to withstand the impact caused by the flow of raw water. As a result, the vibration of the tube 3 caused by the flow of raw water can be suppressed, so that the tube 3 can be prevented from being damaged, and damage to the ultraviolet lamp 7 caused by the tube 3 vibrating and colliding with the ultraviolet lamp 7 can be prevented. Can be prevented.

  Since the raw water flowing through the spiral portion of the tube 3 flows while being stirred along the spiral, it is possible to uniformly irradiate ultraviolet light onto the supernatant liquid of the activated sludge tank having a low transmittance. Thereby, the virus in raw | natural water can be inactivated. The treated water that has been inactivated by the irradiation of ultraviolet rays flows out from the outer case 11 to the outflow pipe, is appropriately treated if necessary, and is discharged into a river or the like.

  On the other hand, the ultraviolet rays that have passed through the tube 3 and raw water or passed through the gaps between the tubes 3 are reflected by the outer peripheral surface of the aluminum support pipe 5. Due to this reflection, ultraviolet rays can be irradiated again toward the raw water in the tube 3, so that the utilization efficiency of the ultraviolet rays can be improved. Further, by reflecting the ultraviolet light hitting the support pipe 5, it is possible to suppress the heating of the support pipe 5 by the ultraviolet light, and it is possible to reduce deterioration of the tube 3 and raw water due to the support pipe 5 being heated and the tube 3 being heated. .

  Moreover, since the ultraviolet rays which go to the direction away from the tube 3 are reflected in the inner case 9 formed of a reflector and can be irradiated to the raw water in the tube 3, the ultraviolet rays irradiated to the raw water can be increased.

  As described above, according to the ultraviolet irradiation device 1 of the present embodiment, the flow path of the raw water is formed by the tube 3 that is resistant to the internal pressure, so that the thickness of the tube can be set thin within a range that can withstand the internal pressure due to the raw water. Since the tube 3 is supported and fixed by the support pipe 5, it is possible to prevent the tube 3 from vibrating due to the flow of raw water, so that damage to the tube 3 and the ultraviolet lamp 7 due to the vibration of the tube 3 can be suppressed. . Thereby, since the wall thickness of the tube 3 can be made thin and the ultraviolet-ray transmittance of the tube 3 can be raised, the ultraviolet irradiation amount with respect to the raw | natural water which flows through the inside of the tube 3 can be increased.

  Further, since the tube 3 is spirally wound around the outer peripheral surface of the support pipe 5 to support and fix the tube, by placing the ultraviolet lamp 7 on the outside of the spiral of the tube 3, the ultraviolet ray 7 is irradiated. Since the ultraviolet rays are not blocked by the support pipe 5 which is the support member of the tube 3, the irradiation amount of the ultraviolet rays is not reduced.

  That is, by supporting and fixing the tube 3 which is a flow path of raw water, the tube 3 is made thinner to increase the ultraviolet transmittance of the tube, and the support pipe 5 is disposed inside the helix of the tube 3. Since the ultraviolet rays can be irradiated from the outside of the spiral of the tube 3 without being blocked by the ultraviolet rays, it is possible to increase the irradiation amount of the ultraviolet rays to the raw water. As a result, a fluid having a low ultraviolet transmittance, for example, a fluid having an ultraviolet transmittance of 10% or less at a liquid layer thickness of 1 cm can be targeted for irradiation.

  Further, since the tube 3 is fixed, the tube 3 does not move and collide with the ultraviolet lamp 7 and the ultraviolet lamp 7 is not damaged. Therefore, since the ultraviolet lamp 7 can be disposed close to the tube 3, the amount of ultraviolet rays can be increased, and the irradiated fluid with low ultraviolet transmittance can be reliably irradiated with ultraviolet rays.

  In addition, if the spiral tube 3 is laid down horizontally without being fixed, the tube 3 may hang down and be damaged. However, in this embodiment, since the spiral tube 3 is fixed to the support pipe 5, the tube 3 does not hang down even when placed in the horizontal direction. Therefore, it is possible to select whether the spiral tube 3 is set up in the vertical direction or laid down in the horizontal direction, so that the degree of freedom in device design and installation location can be improved.

  In this embodiment, a fluid having a low ultraviolet transmittance is used as the supernatant liquid of the activated sludge tank, and the process of inactivating the virus in the supernatant liquid is exemplified, but the application of the ultraviolet irradiation apparatus of the present embodiment is this. It is not limited to. For example, it can be used for sterilization of bacteria contained in fruit juice, sterilization of molasses produced when sugar is produced, or decomposition of harmful substances in industrial wastewater.

  The tube 3 as a fluid flow path can be formed of quartz glass instead of fluororesin. However, quartz glass has a lower tensile strength than fluororesin and is easily damaged by internal pressure due to fluid flow, so fluororesin is used. It is preferable.

  Further, in the present embodiment, the entire support pipe 5 is made of aluminum in order to reflect ultraviolet rays on the outer peripheral surface of the support pipe 5. For example, the support pipe 5 is made of resin, and ultraviolet rays such as aluminum are formed on the outer peripheral surface thereof. The film can be selected as appropriate, for example, by forming a film that reflects light. Moreover, when the transmittance | permeability of the to-be-irradiated fluid is low and an ultraviolet-ray does not reach the outer peripheral surface of the support pipe 5, the material which does not reflect an ultraviolet-ray on the outer peripheral surface of the support pipe 5 can be used.

  Further, in the present embodiment, the inner case 9 is formed of an aluminum reflecting plate in order to irradiate the irradiated fluid with ultraviolet rays going away from the irradiated fluid. However, the reflection that reflects the ultraviolet rays on the inner surface of the inner case 9 is performed. What is necessary is just to be able to reflect ultraviolet rays within the inner case 9, such as by forming a film.

  Further, a groove corresponding to the outer shape of the tube 3 can be formed on the outer peripheral surface of the support pipe 5. According to this, the support fixation of the tube 3 becomes still stronger by winding the tube 3 along a groove | channel. Further, the positioning of the tube 3 is facilitated, and the workability such as manufacturing can be improved.

(Embodiment 2)
The conceptual diagram of the cross section of the ultraviolet irradiation device of Embodiment 2 is shown in FIG. The second embodiment is different from the first embodiment in that a plurality of tubes 3, for example, three tubes 3 are spirally wound around the outer peripheral surface of the support pipe 5 so as not to overlap each other. That is, the second embodiment is that the flow path cross-sectional area of the fluid to be irradiated is three times that of the first embodiment. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  According to this, since the cross-sectional area of the channel through which the irradiated fluid is allowed to flow by increasing the number of tubes 3 is increased, the flow rate of the irradiated fluid can be increased without increasing the pressure loss. The number of tubes 3 can be selected as appropriate based on the amount of fluid to be irradiated and the transmittance of the fluid to be irradiated.

(Embodiment 3)
FIG. 7 is a conceptual diagram of the ultraviolet ray processing apparatus according to the third embodiment. The third embodiment is different from the first embodiment in that the coolant is passed through the support pipe 5 to cool the irradiated fluid. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  The support pipe 5 is made of a metal having high thermal conductivity. Both ends of the support pipe 5 are inserted and supported in openings formed in the inner case 9 and the outer case 11 and are drawn out from the outer case 11 to the outside. Of the ends of the support pipe 5, the refrigerant inflow pipe is connected to the end of the treated water outflow side, and the refrigerant outflow pipe is connected to the end of the raw water inflow side. Thereby, the refrigerant flows through the support pipe 5 so as to face the outflow direction of the fluid to be irradiated.

  Here, the characteristic operation of the present embodiment will be described. While flowing through the spiral tube 3, the temperature of the fluid to be irradiated rises due to the irradiation of ultraviolet rays. Therefore, it is difficult to irradiate the irradiated fluid that deteriorates due to the temperature rise with ultraviolet rays. Therefore, in the present embodiment, the support pipe 5 for winding the tube 3 in a spiral shape is formed of a metal having high heat conductivity and the refrigerant is passed through the support pipe 5 so that the inside of the tube 3 is interposed via the support pipe 5. Cool the irradiated fluid.

  According to this, since the to-be-irradiated fluid which flows through the inside of the tube 3 can be cooled with the refrigerant which flows through the inside of the support pipe 5, the temperature rise of the to-be-irradiated fluid by ultraviolet irradiation can be suppressed. As a result, it is possible to irradiate the irradiated fluid containing the substance that deteriorates due to the temperature rise with ultraviolet rays. In addition, as a metal which forms the support pipe 5, it is preferable to use aluminum with a high reflectance of ultraviolet rays. According to this, the irradiated fluid can be cooled, and the ultraviolet rays hitting the outer peripheral surface of the support pipe 5 can be reflected and irradiated to the irradiated fluid, so that the effective ultraviolet rays can be increased.

(Embodiment 4)
The conceptual diagram of the ultraviolet irradiation device of Embodiment 4 is shown in FIG. The fourth embodiment is different from the first embodiment in that an illuminance meter 31 for measuring the illuminance of the plurality of ultraviolet lamps 7 is arranged in the support pipe 5, and each ultraviolet lamp is provided on the wall surface of the support pipe 5 facing the illuminance meter 31. 7 is formed, and the ultraviolet illuminance of the plurality of ultraviolet lamps 7 is measured. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  Both ends of the support pipe 5 are inserted and supported in openings formed in the inner case 9 and the outer case 11 and are drawn out from the outer case 11 to the outside. A slit 29 corresponding to each ultraviolet lamp 7 is formed on the tube wall of the support pipe 5. The slits 29 are formed along the extending direction of the support pipe 5 and open toward the respective ultraviolet lamps 7. The illuminometer 31 inserted and supported in the support pipe 5 includes, for example, a columnar sensor 33 and a support rod 35 that supports the sensor 33. The sensor 33 can measure ultraviolet rays over the entire circumference. For example, a transmission medium that transmits the illuminance of ultraviolet rays received by the sensor 33 to the outside is accommodated in the support rod 35. The illuminometer 31 is inserted into the support pipe 5, and the support lot 35 is attached to the support pipe 5 so that the sensor 33 is positioned at the slit 29. Thereby, since the ultraviolet-ray which permeate | transmitted the tube 3 injects into the support pipe 5 from each slit 29, and is received with the sensor 33, the illumination intensity of an ultraviolet-ray can be measured.

  According to this, since it is possible to measure the illuminance of ultraviolet rays, if there is an ultraviolet lamp 7 whose extinguishment or ultraviolet output is reduced due to a failure or the like, the measured value of the illuminance of ultraviolet rays is lowered and can be found. It is possible to prevent an insufficient amount of UV irradiation due to a failure of the device.

  Further, since the ultraviolet rays received by the sensor 33 are ultraviolet rays that have passed through the fluid to be irradiated, for example, if the ultraviolet transmittance of the fluid to be irradiated decreases for some reason, the illuminance detected by the illuminometer 31 decreases. Therefore, it is possible to detect a change in the ultraviolet transmittance of the fluid to be irradiated. Thereby, when the ultraviolet transmittance is lowered, by taking measures such as increasing the output of the ultraviolet lamp 7, it is possible to reliably irradiate the fluid to be irradiated with a set amount of ultraviolet rays.

  Note that the illuminance meter 31 of the present embodiment receives ultraviolet light that has passed through the fluid to be irradiated, but can receive ultraviolet light that has not passed through the fluid to be irradiated. For example, the tube 3 is wound around the support pipe 5 in a spiral shape so as to avoid the slits 29 of the support pipe 5, so that the ultraviolet rays irradiated from the ultraviolet lamp 7 are directly incident on the support pipe 5 from the slits 29. In this case, a plate member protruding from the outer peripheral surface of the support pipe 5 can be formed at the edge of each slit 29, and the tube 3 can be configured not to block each slit by this plate member. According to this, even when irradiating the irradiated fluid having a low transmittance of ultraviolet rays with ultraviolet rays, the ultraviolet rays can be incident into the support pipe 5, so that the illuminance of the ultraviolet rays can be measured.

  Further, when the refrigerant is allowed to flow through the support pipe 5 as in the third embodiment, the illuminance meter 31 cannot be disposed in the support pipe 5. In this case, the illuminance meter is installed outside the support pipe 5. be able to.

3 Tube 5 Support pipe 7 UV lamp 9 Inner case 11 Outer case 13 Hook 29 Slit 31 Illuminance meter 33 Sensor 35 Rod

Claims (5)

Fluorocarbon resin tube having a UV transparent is supported wound spirally on the outer peripheral surface of the support pipe which is formed of metal, are arranged a plurality of ultraviolet lamps on the outside of the support pipe away from the front Symbol tube An ultraviolet irradiation device that includes a housing that supports the support pipe and surrounds the plurality of ultraviolet lamps, and irradiates the tube with a fluid to irradiate ultraviolet rays. In the ultraviolet irradiation device according to claim 1 ,
The ultraviolet irradiation apparatus according to claim 1, wherein at least an outer peripheral surface of the support pipe is made of aluminum. In the ultraviolet irradiation device according to claim 1 or 2 ,
An ultraviolet irradiation device characterized in that a coolant is passed through the support pipe. In the ultraviolet irradiation device according to claim 1 or 2 ,
An ultraviolet illuminance meter having a cylindrical sensor for measuring the illuminance of the plurality of ultraviolet lamps is disposed inside the support pipe, and extends along the extending direction of the support pipe on the wall surface of the support pipe facing the sensor. Te, ultraviolet irradiation apparatus, wherein the opening at positions corresponding to said plurality of ultraviolet lamps are made form. In the ultraviolet irradiation device according to any one of claims 1 to 4 ,
An ultraviolet irradiation apparatus, wherein a reflection surface for reflecting ultraviolet rays is formed on an inner surface of the casing .

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