JP4970897B2

JP4970897B2 - UV irradiation system

Info

Publication number: JP4970897B2
Application number: JP2006291769A
Authority: JP
Inventors: 裕司山越
Original assignee: Photoscience Japan Corp
Current assignee: Photoscience Japan Corp
Priority date: 2006-10-26
Filing date: 2006-10-26
Publication date: 2012-07-11
Anticipated expiration: 2026-10-26
Also published as: JP2008104981A

Description

本発明は、被処理液体に紫外線を照射することにより該被処理液体を処理する紫外線照射システムにおいて、必要とする紫外線照射量を確実に確保できるように、紫外線照度をモニタすることに関する。 The present invention relates to monitoring the illuminance of ultraviolet rays so as to ensure a necessary amount of ultraviolet irradiation in an ultraviolet irradiation system for treating the liquid to be treated by irradiating the liquid to be treated with ultraviolet rays.

水処理において、紫外線照射装置は目的に応じた対象物に対する必要紫外線照射量を確保する必要がある。たとえば、公共事業では、大腸菌群を９９．９％不活化するために消毒前の下水二次処理水に３０ｍJ／ｃｍ²の紫外線照射量を確保することが求められている。また、産業界では、一般細菌を９９．９％不活化するために超純水に３０〜５０ｍJ／ｃｍ²の紫外線照射量を確保することを要求されている。 In water treatment, it is necessary for an ultraviolet irradiation device to ensure a necessary ultraviolet irradiation amount for an object according to the purpose. For example, in public works, in order to inactivate 99.9% of coliform bacteria, it is required to secure an ultraviolet irradiation amount of 30 mJ / cm ^{2 in} the sewage secondary treated water before disinfection. In addition, in the industry, it is required to secure an ultraviolet irradiation amount of 30 to 50 mJ / cm ^{2 in} ultrapure water in order to inactivate 99.9% of general bacteria.

水処理において、被処理液体に対する紫外線照射量は、紫外線照射装置の光源の経時変化や水質によって変化する。すなわち、紫外線照射装置においては紫外線を発する光源が使用時間とともに低下し、これが被処理液体に対する紫外線照射量に影響を与える。また、水質による影響としては濁度、色度、紫外線透過率、水温、処理流量などが変化すると被処理液体に対する紫外線照射量に影響を与える。さらに、紫外線照射装置内の被処理液体と接している面では硬度分、スケールなどが付着する場合があり、その付着物によって光源からの紫外線が吸収されることがある。その付着面が紫外線ランプを内挿している透明保護管であったり、周囲からの紫外線を受ける流路管であったりすれば、付着物の存在は被処理液体に対する紫外線照射量の低下を招く。また、その付着物が紫外線照度をモニタ検知する照度センサの窓に付着すれば、照度のモニタリング値が実際より低い値を示してしまう。 In the water treatment, the amount of ultraviolet irradiation with respect to the liquid to be treated varies depending on the temporal change of the light source of the ultraviolet irradiation device and the water quality. That is, in the ultraviolet irradiation device, the light source that emits ultraviolet rays decreases with the use time, which affects the amount of ultraviolet irradiation with respect to the liquid to be treated. Further, as the influence of water quality, if the turbidity, chromaticity, ultraviolet transmittance, water temperature, treatment flow rate, etc. are changed, the amount of ultraviolet irradiation to the liquid to be treated is affected. Furthermore, the surface of the ultraviolet irradiation device that is in contact with the liquid to be treated may adhere to the hardness, scale, or the like, and the ultraviolet light from the light source may be absorbed by the adhered matter. If the adhering surface is a transparent protective tube having an ultraviolet lamp inserted therein or a channel tube that receives ultraviolet rays from the surroundings, the presence of the adhering substance causes a decrease in the amount of ultraviolet irradiation to the liquid to be treated. Moreover, if the adhering matter adheres to the window of the illuminance sensor that monitors and detects the ultraviolet illuminance, the illuminance monitoring value will be lower than the actual value.

水処理向け紫外線照射装置において、紫外線照度を連続モニタリングする照度センサを具備したものは既に存在している。この照度センサの出力に基づき、紫外線照度が所定基準よりも低下したことが検知されたならば、紫外線ランプを交換することで、被処理液体に対する紫外線照射量を低下させることなく、適切な紫外線処理を行うことができる。ところで、照度センサは受光部が劣化する恐れがあるため、定期的に点検する必要がある。モニタ用の照度センサそのものが劣化したのでは、紫外線照度の正確なモニタができないからである。一般に、その点検は、同じ紫外線ランプの光を、点検すべき照度センサと基準となる照度計とで同時に受光し、それぞれの検知データを比較照合することで行われる。 Some ultraviolet irradiation devices for water treatment already have an illuminance sensor that continuously monitors the illuminance of ultraviolet rays. Based on the output of the illuminance sensor, if it is detected that the illuminance of the ultraviolet ray is lower than the predetermined standard, it is possible to replace the ultraviolet lamp and perform an appropriate ultraviolet ray treatment without reducing the ultraviolet ray irradiation amount to the liquid to be treated. It can be performed. By the way, the illuminance sensor needs to be regularly inspected because the light receiving portion may be deteriorated. This is because if the illuminance sensor for monitoring itself deteriorates, it is impossible to accurately monitor the ultraviolet illuminance. In general, the inspection is performed by simultaneously receiving the light of the same ultraviolet lamp by the illuminance sensor to be inspected and the illuminance meter serving as a reference, and comparing and collating the respective detection data.

しかし、今までのところ、専用の照度センサ点検設備が開発されておらず、照度センサの点検に際して、各ユーザは、市販の照度計を基準照度計として用意し、適宜の場所で照度センサと基準照度計とに紫外線ランプの光を照射し、それぞれの検知データを比較照合することで点検を行っていた。そのため、照度センサ点検作業を行うことが面倒であったので、照度センサ点検作業を行い易い環境を整えることが望まれていた。 However, until now, no dedicated illuminance sensor inspection facility has been developed, and when illuminating the sensor, each user prepares a commercially available illuminance meter as the reference illuminance meter, The inspection was performed by irradiating the illuminometer with light from an ultraviolet lamp and comparing and comparing the respective detection data. Therefore, since it is troublesome to perform the illuminance sensor inspection work, it has been desired to prepare an environment in which the illuminance sensor inspection work can be easily performed.

一方、水質のモニタに関しては、既に種々のタイプの水質測定機器が市販されている。しかし、従来は、紫外線照射装置との組み合わせで適切な水質測定機器を提供することがなされておらず、各ユーザが、独自に水質測定機器を用意して、自前で水質管理を行わねばならず、面倒であった。 On the other hand, regarding the water quality monitor, various types of water quality measuring instruments are already on the market. However, conventionally, an appropriate water quality measurement device has not been provided in combination with an ultraviolet irradiation device, and each user has to prepare a water quality measurement device independently and perform water quality management on his own. It was troublesome.

本発明は、上述の点に鑑みてなされたもので、照度センサの点検を容易に行うことができるようにした紫外線照射システムを提供しようとするものである。更には、水質測定も容易に行うことができるようにした紫外線照射システムを提供しようとするものである。 The present invention has been made in view of the above-described points, and an object of the present invention is to provide an ultraviolet irradiation system that can easily check an illuminance sensor. Furthermore, the present invention intends to provide an ultraviolet irradiation system that can easily measure water quality.

本発明に係る紫外線照射システムは、被処理液体を通す流路に設けられ、該流路を通る前記被処理液体に紫外線を照射することにより該被処理液体を処理する紫外線ランプと、該紫外線ランプの照度をモニタするための照度センサと、を備えた紫外線照射装置と、検査用の紫外線ランプと、検査用の紫外線ランプと、検査用の基準照度計と、検査対象たる照度センサをセットするためのセンサ設置部であって、該センサ設置部は前記検査対象たる照度センサを前記基準照度計と同一の受光面に配置するものと、前記紫外線の照射に応じて前記基準照度計と前記照度センサとによる前記紫外線ランプの照度のモニタに応じて各々から同時に出力される、前記基準照度計の出力と前記センサ設置部にセットされた前記検査対象たる照度センサの出力とを比較することで、前記検査対象たる照度センサの信頼度を点検する比較装置と、を備えた照度センサ点検設備と、を具備し、前記紫外線照射装置から前記照度センサを外して前記センサ設置部にセットすることで、該照度センサを前記照度センサ点検設備で点検できることを特徴とする。これにより、ユーザは紫外線照射装置から取り外した検査対象の照度センサをセンサ設置部にセットしてから、１回の紫外線照射のみによって照度センサを検査することのできる、検査の容易な専用の照度センサ点検設備を具備した紫外線照射システムを提供することができるので、照度センサの点検を容易に行うことができるようになる。 An ultraviolet irradiation system according to the present invention is provided in a flow path for passing a liquid to be processed, and an ultraviolet lamp for processing the liquid to be processed by irradiating the liquid to be processed passing through the flow path with ultraviolet light, and the ultraviolet lamp In order to set an ultraviolet irradiation device equipped with an illuminance sensor for monitoring the illuminance of, an ultraviolet lamp for inspection, an ultraviolet lamp for inspection, a reference illuminometer for inspection, and an illuminance sensor to be inspected The sensor illuminator, wherein the illuminance sensor to be inspected is disposed on the same light receiving surface as the reference illuminance meter, and the reference illuminance meter and the illuminance sensor according to the irradiation of the ultraviolet rays. the ultraviolet according to the monitoring of the illuminance of the lamps is simultaneously outputted from each output of said object serving as an illumination sensor which is set in the sensor installation portion and the output of the reference illumination meter according the And a comparison device for checking the reliability of the illuminance sensor to be inspected, and an illuminance sensor inspection facility comprising: The illumination sensor can be inspected by the illumination sensor inspection facility by being set in the section. As a result, the user can inspect the illuminance sensor by only one ultraviolet irradiation after setting the illuminance sensor to be inspected removed from the ultraviolet irradiation device on the sensor installation part. Since the ultraviolet irradiation system equipped with the inspection facility can be provided, the illuminance sensor can be easily inspected.

本発明の紫外線照射システムにおいては、前記紫外線照射装置において前記流路を通る前記被処理液体の水質をモニタする水質測定機器を更に具備するようにしてもよい。これにより、水質測定も容易に行うことができるようになる。 In the ultraviolet irradiation system of the present invention, the ultraviolet irradiation device may further include a water quality measuring device that monitors the water quality of the liquid to be treated that passes through the flow path. Thereby, water quality can be easily measured.

以下、添付図面を参照して、本発明の一実施例につき詳細に説明する。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

図１は、本発明の一実施例に係る紫外線照射システムの正面略図である。この実施例に係る紫外線照射システムにあっては、設備全体が１つのフレーム又は筐体内に納められており、該フレーム又は筐体の下部に紫外線照射装置１が収容されており、その上部の右側に電源設備２が収容され、その上部の左側に照度センサ点検設備３が収容されている。 FIG. 1 is a schematic front view of an ultraviolet irradiation system according to an embodiment of the present invention. In the ultraviolet irradiation system according to this embodiment, the entire equipment is housed in one frame or casing, and the ultraviolet irradiation apparatus 1 is accommodated in the lower part of the frame or casing, and the right side of the upper part thereof. The power supply facility 2 is housed in the illuminance sensor inspection facility 3 on the left side of the upper portion thereof.

紫外線照射装置１は、被処理液体を通す流路を形成する密閉管４と、該密閉管４の中に挿入された紫外線透過管（石英管）５と、該紫外線透過管（石英管）５の中に収納された紫外線ランプ６とを含んでいる。公知のように、密閉管４の両端のカバー部４ａ，４ｂを外して紫外線透過管５にアクセスし、紫外線ランプ６の交換などを行うことができるようになっている。また、密閉管４には、被処理液体を導入又は排出するためのポート４ｃ，４ｄが設けられている。このポート４ｃ，４ｄに配管（図示せず）が接続され、該配管を介して被処理液体が密閉管４に流される。被処理液体は密閉管４内を流れる過程で、紫外線透過管（石英管）５を透過して照射される紫外線ランプ６からの紫外線に曝され、殺菌又は消毒などの所定の処理が施される。 The ultraviolet irradiation device 1 includes a sealed tube 4 that forms a flow path for passing a liquid to be treated, an ultraviolet transmission tube (quartz tube) 5 inserted into the sealed tube 4, and the ultraviolet transmission tube (quartz tube) 5. And an ultraviolet lamp 6 housed in the inside. As is well known, the cover portions 4a and 4b at both ends of the sealed tube 4 can be removed to access the ultraviolet ray transmissive tube 5 so that the ultraviolet lamp 6 can be replaced. The sealed tube 4 is provided with ports 4c and 4d for introducing or discharging the liquid to be processed. Pipes (not shown) are connected to the ports 4c and 4d, and the liquid to be treated is caused to flow to the sealed pipe 4 through the pipes. The liquid to be treated is exposed to ultraviolet rays from an ultraviolet lamp 6 irradiated through the ultraviolet transmission tube (quartz tube) 5 in the process of flowing through the sealed tube 4, and is subjected to a predetermined treatment such as sterilization or disinfection. .

密閉管４の所定箇所には、内部に配置した紫外線ランプ６の照度をモニタするための照度センサ７が配置される。この照度センサ７は、例えば、密閉管４の側面に設けられた透明面を通してその内部の紫外線ランプ６から照射された紫外線を受光し、その受光量に応じた電気的検知信号を出力する。この照度センサ７は、密閉管４の所定設置箇所からの取り外しが自在であるが、常時は密閉管４の所定箇所に設置されていて、照度を常時モニタする。照度センサ点検設備３を使用して、該照度センサ７の点検を行う時は、密閉管４の所定箇所から照度センサ７が外されて、後述するように、照度センサ点検設備３にセットされる。 An illuminance sensor 7 for monitoring the illuminance of the ultraviolet lamp 6 disposed inside is disposed at a predetermined location of the sealed tube 4. The illuminance sensor 7 receives, for example, ultraviolet rays emitted from the ultraviolet lamp 6 through a transparent surface provided on the side surface of the sealed tube 4 and outputs an electrical detection signal corresponding to the amount of received light. The illuminance sensor 7 can be detached from a predetermined installation location of the sealed tube 4, but is always installed at a predetermined location of the sealed tube 4 and constantly monitors the illuminance. When the illuminance sensor inspection facility 3 is used to inspect the illuminance sensor 7, the illuminance sensor 7 is removed from a predetermined portion of the sealed tube 4 and set in the illuminance sensor inspection facility 3 as will be described later. .

また、密閉管４の所定箇所あるいは、ポート４ｃ，４ｄに接続された配管（図示せず）の所定箇所には、各種の水質をモニタするための各種の水質測定機器（図示せず）が配置される。水質測定項目としては濁度、色度、紫外線透過率、水温、処理流量などの各項目があり、それらの項目を測定するのに必要なセンサや測定機器が設けられる。 Various water quality measuring devices (not shown) for monitoring various water qualities are arranged at predetermined locations of the sealed tube 4 or pipes (not shown) connected to the ports 4c and 4d. Is done. As water quality measurement items, there are items such as turbidity, chromaticity, ultraviolet transmittance, water temperature, treatment flow rate and the like, and sensors and measuring instruments necessary for measuring these items are provided.

電源設備２には、紫外線ランプ６に対する電源供給回路が設けられていると共に、上記照度センサ７からの出力信号を受信して所定の紫外線ランプ照度モニタ処理を行う電子・電気機器、上記各種の水質測定機器（図示せず）からの測定信号を受信して所定の水質モニタ処理を行う電子・電気機器、その他の種々の測定機器あるいは制御機器が設けられている。 The power supply facility 2 is provided with a power supply circuit for the ultraviolet lamp 6, electronic / electrical equipment that receives an output signal from the illuminance sensor 7 and performs predetermined ultraviolet lamp illuminance monitoring processing, and various water qualities described above. An electronic / electrical device that receives a measurement signal from a measuring device (not shown) and performs predetermined water quality monitoring processing, and other various measuring devices or control devices are provided.

図２は、電源設備２における表示パネル面の一例を示す。この図を参照して、本システムが有する各種のモニタ機能、測定機能などについて列挙する。表示計８〜１２は、上記水質測定機器が測定した水質測定結果を表示するものであり、濁度計８，色度計９，紫外線透過率計１０，流量計１１，水温計１２などである。これらは、上記の各水質測定項目である濁度、色度、紫外線透過率、水温、処理流量の測定結果を表示するものである。更に、紫外線照射量計１３、電源表示灯14，漏電表示灯１５，盤内温度異常表示灯１６，UV異常表示灯１７，UV点灯表示灯１８，積算時間計１９，クリーニング異常表示灯２０，濁度異常表示灯２１，色度異常表示灯２２，UV運転切替スイッチ２３，紫外線透過率異常表示灯２４，流量異常表示灯２５，水温異常表示灯２６，紫外線照射量異常表示灯２７が設けられている。また、付設照度計２８は、上記照度センサ７からの出力信号に基づき、紫外線照度のモニタ結果を表示する。 FIG. 2 shows an example of the display panel surface in the power supply facility 2. With reference to this figure, various monitor functions, measurement functions, and the like of this system are listed. The display meters 8 to 12 display the water quality measurement results measured by the water quality measuring device, such as a turbidity meter 8, a chromaticity meter 9, an ultraviolet transmittance meter 10, a flow meter 11, and a water temperature meter 12. . These display the measurement results of the turbidity, chromaticity, ultraviolet transmittance, water temperature, and treatment flow rate, which are the above-mentioned water quality measurement items. Furthermore, the ultraviolet irradiation meter 13, the power indicator 14, the leakage indicator 15, the panel temperature abnormality indicator 16, the UV abnormality indicator 17, the UV lighting indicator 18, the integrating timer 19, the cleaning abnormality indicator 20, A degree abnormality indicator lamp 21, a chromaticity abnormality indicator lamp 22, a UV operation changeover switch 23, an ultraviolet ray transmittance abnormality indicator lamp 24, a flow rate abnormality indicator lamp 25, a water temperature abnormality indicator lamp 26, and an ultraviolet irradiation amount abnormality indicator lamp 27 are provided. Yes. The attached illuminometer 28 displays the monitor result of the ultraviolet illuminance based on the output signal from the illuminance sensor 7.

なお、この実施例で示した紫外線照射装置１は光源の紫外線ランプ６を２灯使用しているため、UV点灯表示灯１８は、それぞれに対応して合計２個設けられている。漏電表示灯１５、盤内温度異常表示灯１６、UV異常表示灯１７、クリーニング異常表示灯２０は紫外線照射装置１の装置としての異常を示すためのものである。濁度異常表示灯２１、色度異常表示灯２２、紫外線透過率異常表示灯２４、流量異常表示灯２５は水質にのみ依存する異常を示している。これらの水質異常は、上述の水質測定機器の測定データに基づき判定する。水温異常表示灯は処理水が止水し、かつ、光源が点灯していた場合に水温が上昇するために設けてある。紫外線照射量異常表示灯は付設照度計と流量計からの情報にて得られる紫外線照射量が異常となった場合に表示する。その他、積算時間計１９は光源の点灯時間の積算時間を示し、光源を交換する際、リセットが可能である。 In addition, since the ultraviolet irradiation device 1 shown in this embodiment uses two ultraviolet lamps 6 as light sources, a total of two UV lighting display lamps 18 are provided corresponding to each. The earth leakage indicator lamp 15, the in-panel temperature abnormality indicator lamp 16, the UV abnormality indicator lamp 17, and the cleaning abnormality indicator lamp 20 are for indicating an abnormality as an apparatus of the ultraviolet irradiation device 1. The turbidity abnormality indicator lamp 21, the chromaticity abnormality indicator lamp 22, the ultraviolet ray transmittance abnormality indicator lamp 24, and the flow rate abnormality indicator lamp 25 show an abnormality that depends only on the water quality. These water quality abnormalities are determined based on the measurement data of the above-described water quality measuring device. The water temperature abnormality indicator lamp is provided to increase the water temperature when the treated water stops and the light source is turned on. The ultraviolet irradiation amount abnormality indicator lamp is displayed when the ultraviolet irradiation amount obtained from the information from the attached illuminometer and flow meter becomes abnormal. In addition, the integration time meter 19 indicates the integration time of the lighting time of the light source, and can be reset when the light source is replaced.

図３は、照度センサ点検設備３の構成例を示す。照度センサ点検設備３の内部には、紫外線照射装置１に使用する光源の紫外線ランプ６と同じ波長の紫外線を発光する紫外線ランプ２９が検査用の光源として設けられており、更に、検査用の基準照度計３１と、検査対象たる照度センサ７をセットするためのセンサ設置部３０とが、測定台３２に載せられている。比較装置を含む点検用電子機器３３は、前記基準照度計３１の出力と前記センサ設置部３０にセットされた前記検査対象たる照度センサ７の出力とを該比較装置にて比較することで、前記検査対象たる照度センサ７の信頼度を点検する。ここで、照度センサ７の感度が落ちていると判定されたら、密閉管４にセットする照度センサ７を別のものに交換したり、該照度センサ７の掃除・修理等のメンテナンスを行えばよい。なお、この照度センサ点検設備３を使用して、前記照度センサ７の点検を行う時のみ、該照度センサ７が密閉管４の所定箇所から外されて、該照度センサ点検設備３のセンサ設置部３０にセットされる。このように、照度センサ点検設備３が紫外線照射装置１に付属して予め設置されているので、照度センサ点検作業を行い易い。 FIG. 3 shows a configuration example of the illuminance sensor inspection facility 3. Inside the illuminance sensor inspection facility 3, an ultraviolet lamp 29 that emits ultraviolet rays having the same wavelength as the ultraviolet lamp 6 of the light source used in the ultraviolet irradiation device 1 is provided as a light source for inspection, and further, a reference for inspection. An illuminometer 31 and a sensor installation unit 30 for setting the illuminance sensor 7 to be inspected are mounted on a measurement table 32. The inspection electronic device 33 including the comparison device compares the output of the reference illuminance meter 31 with the output of the illuminance sensor 7 to be inspected set in the sensor installation unit 30 by the comparison device. The reliability of the illuminance sensor 7 to be inspected is checked. Here, if it is determined that the sensitivity of the illuminance sensor 7 is lowered, the illuminance sensor 7 set on the sealed tube 4 may be replaced with another one, or maintenance such as cleaning and repair of the illuminance sensor 7 may be performed. . Only when the illuminance sensor inspection facility 3 is used to inspect the illuminance sensor 7, the illuminance sensor 7 is removed from a predetermined location of the sealed tube 4, and the sensor installation portion of the illuminance sensor inspection facility 3 is used. Set to 30. Thus, since the illuminance sensor inspection facility 3 is attached in advance to the ultraviolet irradiation device 1, it is easy to perform the illuminance sensor inspection work.

なお、照度センサ点検設備３は、図１に示すように紫外線照射装置１と同一フレーム又は筐体内に収容されていなくてもよい。つまり、照度センサ点検設備３が紫外線照射装置１から分離されていても、１体のシステムとして、近くにまとめられていれば、本発明の目的を達成することができる。また、水質測定機器も紫外線照射装置１から分離して設けてもよい。 The illuminance sensor inspection facility 3 may not be accommodated in the same frame or casing as the ultraviolet irradiation device 1 as shown in FIG. That is, even if the illuminance sensor inspection facility 3 is separated from the ultraviolet irradiation device 1, the object of the present invention can be achieved as long as the illuminance sensor inspection facility 3 is integrated as a single system. Further, the water quality measuring device may be provided separately from the ultraviolet irradiation device 1.

本発明の一実施例に係る紫外線照射システムの正面略図。1 is a schematic front view of an ultraviolet irradiation system according to an embodiment of the present invention. 電源設備における表示パネル面の一例を示す図。The figure which shows an example of the display panel surface in power supply equipment. 照度センサ点検設備の構成例を示す略図。Schematic which shows the structural example of illumination intensity sensor inspection equipment.

Explanation of symbols

１紫外線照射装置
２電源設備
３照度センサ点検設備
４密閉管
５紫外線透過管（石英管）
６紫外線ランプ
７照度センサ
３０センサ設置部
３１検査用の基準照度計
３２測定台
３３比較装置を含む点検用電子機器 DESCRIPTION OF SYMBOLS 1 Ultraviolet irradiation device 2 Power supply equipment 3 Illuminance sensor inspection equipment 4 Sealed tube 5 Ultraviolet transmission tube (quartz tube)
6 UV lamp 7 Illuminance sensor 30 Sensor installation unit 31 Reference illuminance meter 32 for inspection Measuring table 33 Electronic equipment for inspection including comparison device

Claims

An ultraviolet lamp which is provided in a flow path for passing the liquid to be processed and which processes the liquid to be processed by irradiating the liquid to be processed passing through the flow path with an ultraviolet light, and an illuminance sensor for monitoring the illuminance of the ultraviolet lamp And an ultraviolet irradiation device comprising:
A sensor installation unit for setting an ultraviolet lamp for inspection, a reference illuminance meter for inspection, and an illuminance sensor to be inspected , wherein the sensor installation unit has the same illuminance sensor as the inspection object as the reference illuminance meter An output of the reference illuminometer , which is simultaneously output from each according to the monitor of the illuminance of the ultraviolet lamp by the reference illuminance meter and the illuminance sensor according to the irradiation of the ultraviolet light, A comparison device for checking the reliability of the illuminance sensor to be inspected by comparing the output of the illuminance sensor to be inspected set in the sensor installation unit, and an illuminance sensor inspection facility comprising:
And the illuminance sensor can be inspected by the illuminance sensor inspection facility by removing the illuminance sensor from the ultraviolet irradiation apparatus and setting the illuminance sensor on the sensor installation unit.

The ultraviolet irradiation system according to claim 1, wherein the illuminance sensor inspection facility is provided in the facility that accommodates the ultraviolet irradiation device.

The ultraviolet irradiation system according to claim 1, further comprising a water quality measurement device that monitors the water quality of the liquid to be treated that passes through the flow path in the ultraviolet irradiation device.

4. The ultraviolet irradiation system according to claim 3, wherein the water quality measuring device measures part or all of the turbidity, chromaticity, ultraviolet transmittance, water temperature, and treatment flow rate of the liquid to be treated.