JP2003170162A - Photocatalytic reaction chamber of water treating device - Google Patents
Photocatalytic reaction chamber of water treating deviceInfo
- Publication number
- JP2003170162A JP2003170162A JP2001371615A JP2001371615A JP2003170162A JP 2003170162 A JP2003170162 A JP 2003170162A JP 2001371615 A JP2001371615 A JP 2001371615A JP 2001371615 A JP2001371615 A JP 2001371615A JP 2003170162 A JP2003170162 A JP 2003170162A
- Authority
- JP
- Japan
- Prior art keywords
- outer tube
- photocatalytic reaction
- shielding layer
- light
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000013032 photocatalytic reaction Methods 0.000 title claims abstract description 29
- 239000011941 photocatalyst Substances 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000010936 titanium Substances 0.000 claims abstract description 5
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 230000001699 photocatalysis Effects 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 230000006866 deterioration Effects 0.000 abstract description 6
- 238000000151 deposition Methods 0.000 abstract 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 239000013585 weight reducing agent Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 239000008213 purified water Substances 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000002070 germicidal effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 102100033029 Carbonic anhydrase-related protein 11 Human genes 0.000 description 1
- 101000867841 Homo sapiens Carbonic anhydrase-related protein 11 Proteins 0.000 description 1
- 101001075218 Homo sapiens Gastrokine-1 Proteins 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Catalysts (AREA)
- Physical Water Treatments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光触媒方式の水処
理装置における光触媒反応容器に係り、特に、有機樹脂
製の外管の劣化を防止するための対策に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photocatalytic reaction container in a photocatalytic water treatment apparatus, and more particularly to measures for preventing deterioration of an organic resin outer tube.
【０００２】[0002]
【従来の技術】近年、酸化チタン等の光触媒に光を照射
すると強力な酸化力を生じて、有害有機物の分解や、悪
臭物質の分解・殺菌等の作用を示すことが注目されてい
る。しかも、このような光触媒の作用は半永久的に持続
するという利点もあるので、これを工場廃水等の浄化に
適用することで顕著なコストメリットが期待できる。そ
れゆえ従来より、特開２０００−２５４６６７号や特開
平１０−２０２２５７号等の公報に記載されているよう
に、光触媒を用いた水処理方法や水処理装置が多数提案
されている。2. Description of the Related Art In recent years, attention has been paid to the fact that when a photocatalyst such as titanium oxide is irradiated with light, it exerts a strong oxidizing power to exert a function of decomposing harmful organic substances and decomposing / sterilizing malodorous substances. Moreover, since the action of such a photocatalyst has the advantage that it lasts semipermanently, applying this to the purification of industrial wastewater, etc., can be expected to have a significant cost advantage. Therefore, as described in JP-A 2000-254667 and JP-A 10-202257, many water treatment methods and water treatment apparatuses using a photocatalyst have been conventionally proposed.
【０００３】図３は、従来技術に係る水処理装置の光触
媒反応容器を示す断面図である。同図に示す光触媒反応
容器９は、石英ガラス等の紫外光を透過させる材料から
なる内管３と、塩化ビニル等の有機樹脂製の外管４とか
らなる２重管構造の円筒容器を有し、この円筒容器の両
端は塩化ビニル等の有機樹脂製のフランジ１１によって
蓋閉されている。また、内管３の内部には殺菌灯等の光
源２が配置されていて、この光源２から出射される紫外
光が、外管４の内壁面に沿って設けられている酸化チタ
ン等の光触媒体１に照射されるようになっている。かか
る光触媒反応容器９において、供給口６から円筒容器内
へ供給された被処理水である廃水５は、内管３と外管４
との間を流れていく過程で、光触媒体１の光触媒作用に
よって浄化されるので、浄化水８として排出口７から排
出される。FIG. 3 is a sectional view showing a photocatalytic reaction vessel of a water treatment apparatus according to the prior art. The photocatalytic reaction container 9 shown in the figure has a double-tube cylindrical container composed of an inner tube 3 made of a material such as quartz glass that transmits ultraviolet light and an outer tube 4 made of an organic resin such as vinyl chloride. Both ends of this cylindrical container are closed by flanges 11 made of an organic resin such as vinyl chloride. Further, a light source 2 such as a germicidal lamp is arranged inside the inner tube 3, and the ultraviolet light emitted from the light source 2 is a photocatalyst such as titanium oxide provided along the inner wall surface of the outer tube 4. The body 1 is irradiated. In the photocatalytic reaction container 9, the waste water 5 that is the water to be treated supplied from the supply port 6 into the cylindrical container is the inner pipe 3 and the outer pipe 4.
In the process of flowing between and, it is purified by the photocatalytic action of the photocatalyst body 1, and thus is discharged from the discharge port 7 as purified water 8.
【０００４】このような構成の光触媒反応容器９は、外
管４の内壁面に設けられる円筒状の光触媒体１の表面積
が大きく、かつ該光触媒体１に対して光源２からの紫外
光を均一に照射することができるので、光触媒作用によ
る浄化効率が高いという利点がある。また、円筒容器の
外管４として塩化ビニル等の有機樹脂材料を用いている
ので、耐水性を確保しつつ低コスト化や軽量化が実現さ
れている。In the photocatalyst reaction container 9 having such a structure, the surface area of the cylindrical photocatalyst 1 provided on the inner wall surface of the outer tube 4 is large, and the ultraviolet light from the light source 2 is uniform with respect to the photocatalyst 1. It is possible to irradiate the surface with the light, so that there is an advantage that the purification efficiency by the photocatalytic action is high. Further, since an organic resin material such as vinyl chloride is used as the outer tube 4 of the cylindrical container, cost reduction and weight reduction are realized while ensuring water resistance.
【０００５】[0005]
【発明が解決しようとする課題】上述した従来の光触媒
反応容器９は、塩化ビニル等の有機樹脂材料からなる外
管４によって低コスト化や軽量化が図られているが、こ
の外管４の内壁面や、同じく塩化ビニル等の有機樹脂材
料からなるフランジ１１の内壁面に、光源２からの紫外
光が直接照射されるため、長期間使用すると、これら有
機樹脂材料が劣化して水漏れを起こす危険性があった。
そこで、外管４やフランジ１１をガラス製もしくは金属
製とすることが考えられるが、ガラス製の場合は破損し
やすいという難点があり、金属製の場合は錆びや腐食を
起こしやすいという難点がある。In the conventional photocatalytic reaction vessel 9 described above, the outer tube 4 made of an organic resin material such as vinyl chloride is used for cost reduction and weight reduction. Since the inner wall surface and the inner wall surface of the flange 11 also made of an organic resin material such as vinyl chloride are directly irradiated with the ultraviolet light from the light source 2, when these are used for a long period of time, these organic resin materials deteriorate to prevent water leakage. There was a risk of causing it.
Therefore, it is conceivable that the outer tube 4 and the flange 11 are made of glass or metal, but if they are made of glass, they are easily damaged, and if they are made of metal, they are easily rusted or corroded. .
【０００６】本発明は、このような従来技術の実情に鑑
みてなされたもので、その目的は、有機樹脂製の外管を
採用して低コスト化や軽量化を図っても長期間劣化を起
こさず安定して使用できる、高信頼性の水処理装置の光
触媒反応容器を提供することにある。The present invention has been made in view of the circumstances of the prior art as described above, and an object thereof is to prevent deterioration for a long period of time even if an outer tube made of an organic resin is adopted to reduce cost and weight. It is intended to provide a highly reliable photocatalytic reaction container of a water treatment device which can be stably used without causing it.
【０００７】[0007]
【課題を解決するための手段】上述した目的を達成する
解決手段として、本発明は、紫外光を透過させる内管と
有機樹脂製の外管とからなる２重管構造の円筒容器と、
前記内管の内部に配置された光源と、前記外管の内壁面
に沿って設けられ前記光源により照射される光触媒体と
を備え、前記内管と前記外管との間を流れる被処理水を
光触媒作用で浄化する水処理装置の光触媒反応容器にお
いて、前記外管の内壁面の全面、もしくは該内壁面のう
ち前記光触媒体が存しない領域に、チタンの酸化物とジ
ルコニウムの酸化物とアルミニウムの酸化物のいずれか
一種以上を含む遮光層を被着させることとした。As a means for achieving the above-mentioned object, the present invention provides a cylindrical container having a double tube structure composed of an inner tube for transmitting ultraviolet light and an outer tube made of an organic resin,
Water to be treated, which comprises a light source disposed inside the inner tube and a photocatalyst provided along the inner wall surface of the outer tube and illuminated by the light source, and which flows between the inner tube and the outer tube. In a photocatalytic reaction vessel of a water treatment device for purifying water by photocatalysis, titanium oxide, zirconium oxide, and aluminum are formed on the entire inner wall surface of the outer tube or on the inner wall surface in a region where the photocatalyst does not exist. A light-shielding layer containing at least one of the above oxides was deposited.
【０００８】チタンやジルコニウム、アルミニウム等の
酸化物は、水に不溶で紫外光を透過しにくく、かつ酸や
アルカリに対して化学的に安定である。したがって、こ
れらの酸化物からなる遮光層を被着させている外管の内
壁面のコーティング領域は、長期間にわたって光源の紫
外光から保護されることとなり、よって有機樹脂製の外
管が劣化しにくくなって長寿命化が図れる。特に、遮光
層がチタンの酸化物を含んでいる場合には、紫外光の悪
影響を防止できるだけでなく、有機物の漏出を抑制でき
るという効果も期待できる。なお、鉛や鉄、亜鉛等の酸
化物も紫外光を透過しにくいが、毒性があったり、酸や
アルカリに溶解しやすいため、水処理装置の光触媒反応
容器に採用することは好ましくない。Oxides of titanium, zirconium, aluminum and the like are insoluble in water, hard to transmit ultraviolet light, and chemically stable to acids and alkalis. Therefore, the coating area on the inner wall surface of the outer tube on which the light-shielding layer made of these oxides is applied is protected from the ultraviolet light of the light source for a long period of time, and the outer tube made of the organic resin is deteriorated. It becomes difficult and the life can be extended. In particular, when the light-shielding layer contains an oxide of titanium, not only the adverse effect of ultraviolet light can be prevented but also the leakage of organic substances can be suppressed. It should be noted that oxides of lead, iron, zinc, etc. are also less likely to transmit ultraviolet light, but are not preferable because they are toxic and easily dissolved in acid or alkali, and therefore are not used in the photocatalytic reaction vessel of the water treatment device.
【０００９】また、遮光層は、外管の内壁面のうち光触
媒体が存しない領域には必ずコーティングしておく必要
があるが、遮光層を外管の内壁面の全面にコーティング
しておけば、光触媒体を透過した紫外光が外管に到達す
る可能性が大幅に低減するので、外管の劣化をより確実
に防止することができる。さらに、円筒容器の両端を蓋
閉しているフランジの内壁面にも遮光層をコーティング
しておけば、有機樹脂製のフランジを紫外光から保護す
ることもできるので、光触媒反応容器の長寿命化を図る
うえで一層好ましい。The light shielding layer must be coated on the inner wall surface of the outer tube where the photocatalyst does not exist. However, if the light shielding layer is coated on the entire inner wall surface of the outer tube. Since the possibility that ultraviolet light transmitted through the photocatalyst reaches the outer tube is greatly reduced, deterioration of the outer tube can be more reliably prevented. Furthermore, by coating the inner wall surface of the flange that closes both ends of the cylindrical container with a light-shielding layer, the flange made of organic resin can be protected from ultraviolet light, and the life of the photocatalytic reaction container can be extended. It is more preferable in order to achieve
【００１０】また、チタンの酸化物とジルコニウムの酸
化物とアルミニウムの酸化物のいずれか一種以上の粉末
と、チタニアとアルミナとジルコニアとシリカのいずれ
か一種以上のコロイド状物とを混ぜ合わせて形成された
スラリを、外管の内壁面に塗布して乾燥させたものを遮
光層となしておけば、該酸化物の隙間に該コロイド状物
が充填されるため、遮光層が外管に密着して耐剥離性が
向上すると共に、遮光層の強度も高まるので好ましい。
その際、前記スラリに予めポリビニルアルコールを加え
ておけば、塗布したスラリが乾燥して収縮しても微細な
隙間が生じにくくなるので、遮光層の強度をより高める
ことが可能となる。Further, it is formed by mixing one or more powders of titanium oxide, zirconium oxide and aluminum oxide with a colloidal substance of one or more of titania, alumina, zirconia and silica. If the light-shielding layer is formed by applying the dried slurry to the inner wall surface of the outer tube to form a light-shielding layer, the colloidal substance is filled in the gap between the oxides, so that the light-shielding layer adheres to the outer tube. Thus, the peeling resistance is improved and the strength of the light shielding layer is also increased, which is preferable.
At this time, if polyvinyl alcohol is added to the slurry in advance, even if the applied slurry dries and shrinks, it becomes difficult to form fine gaps, so that the strength of the light shielding layer can be further increased.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施形態例を図面
を参照して説明すると、図１は第１実施形態例に係る水
処理装置の光触媒反応容器を示す断面図であり、従来技
術の説明に用いた図３と対応する部分には同一符号が付
してある。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a photocatalytic reaction container of a water treatment apparatus according to the first embodiment. 3 corresponding to those used in the description of FIG.
【００１２】図１に示すように、本実施形態例に係る光
触媒反応容器９は、石英ガラス製の内管３と、塩化ビニ
ル製の外管４とからなる２重管構造の円筒容器を有し、
この円筒容器の両端は塩化ビニル製のフランジ１１によ
って蓋閉されている。また、内管３の内部には光源（殺
菌灯）２が配置されており、この光源２から出射される
紫外光が外管４の内壁面に沿って設けられている酸化チ
タン等の光触媒体１に照射されるようになっている。た
だし、外管４の内壁面のうち、光触媒体１が存しない領
域とフランジ１１の内壁面には、紫外光を透過しにくい
材料からなる遮光層１０が被着させてある。As shown in FIG. 1, the photocatalytic reaction container 9 according to the present embodiment has a cylindrical container having a double tube structure consisting of an inner tube 3 made of quartz glass and an outer tube 4 made of vinyl chloride. Then
Both ends of this cylindrical container are closed by flanges 11 made of vinyl chloride. Further, a light source (sterilization lamp) 2 is arranged inside the inner tube 3, and ultraviolet light emitted from the light source 2 is provided along the inner wall surface of the outer tube 4 such as a titanium oxide photocatalyst body. 1 is irradiated. However, of the inner wall surface of the outer tube 4, a region where the photocatalyst 1 does not exist and the inner wall surface of the flange 11 are covered with a light shielding layer 10 made of a material that hardly transmits ultraviolet light.
【００１３】上述した光触媒反応容器９は、次のような
手順で作製した。まず、予め水１００ｍｌに、重合度７
００のポリビニルアルコール（クラレポパール１１７）
１３ｇを溶かしておき、これに弱アルカリ性シリカゾル
（日産化学製，シリカゾル−Ｎ）６５０ｇを加えた後、
この溶液に酸化チタン（石産産業製，ＣＲ５０）２５０
ｇを添加して調整したスラリを、外管４およびフランジ
１１の内壁面に刷毛で薄くコーティングし、６０℃で乾
燥させる。しかる後、流水に浸して有機結合剤を溶解除
去することにより、外管４およびフランジ１１の所望の
コーティング領域に遮光層１０を被着させた。The photocatalytic reaction container 9 described above was manufactured by the following procedure. First, the degree of polymerization is 7 in 100 ml of water in advance.
Polyvinyl alcohol of 00 (Kuraray Popal 117)
After dissolving 13 g and adding 650 g of weakly alkaline silica sol (manufactured by Nissan Kagaku, silica sol-N),
Titanium oxide (CR50) 250 is added to this solution.
The slurry prepared by adding g is thinly coated on the inner wall surfaces of the outer tube 4 and the flange 11 with a brush and dried at 60 ° C. Thereafter, the light-shielding layer 10 was applied to desired coating regions of the outer tube 4 and the flange 11 by immersing it in running water to dissolve and remove the organic binder.
【００１４】また、外管４の内壁面のうち遮光層１０を
被着させていない領域に光触媒体１を配置し、かつ、内
管３の内部に、光触媒体１に紫外光を照射するための光
源２として４０Ｗの殺菌灯を配置した。なお、本実施形
態例で採用した光触媒体１は、特願平１１−７９４４７
号公報に記載されている方法で調整した触媒である。具
体的には、平織りしたＥガラス繊維に、酸化チタン光触
媒Ｐ２５（テグッサ社製の商品名）とシリカゾルとＰＶ
Ａで調整したスラリを含浸させ、成形後に乾燥・焼成し
て得た直径１００ｍｍ、長さ１ｍの円筒状の触媒であ
る。Further, the photocatalyst 1 is arranged in a region of the inner wall surface of the outer tube 4 where the light shielding layer 10 is not applied, and the inside of the inner tube 3 is irradiated with ultraviolet light. A 40 W germicidal lamp was arranged as the light source 2 of the above. The photocatalyst body 1 adopted in this embodiment is the same as that of Japanese Patent Application No. 11-79447.
It is a catalyst prepared by the method described in Japanese Patent Publication No. Specifically, a plain weave E glass fiber is coated with titanium oxide photocatalyst P25 (trade name of Tegusa Co.), silica sol, and PV.
It is a cylindrical catalyst having a diameter of 100 mm and a length of 1 m obtained by impregnating the slurry adjusted in A, drying and firing after molding.
【００１５】このような構成の光触媒反応容器９におい
て、供給口６から円筒容器内へ供給された被処理水であ
る廃水５は、内管３と外管４との間を流れていく過程
で、光触媒体１の光触媒作用によって浄化されていき、
浄化水８として排出口７から排出される。そして、低コ
スト化や軽量化を図るために塩化ビニルで形成されてい
る外管４およびフランジ１１が、光源２からの紫外光に
直接晒されないように遮光層１０で保護してあるため、
長期間にわたって劣化しにくく、それゆえ、この光触媒
反応容器９は長期間安定して使用することができる。In the photocatalytic reaction container 9 having such a structure, the waste water 5 as the water to be treated supplied from the supply port 6 into the cylindrical container flows between the inner pipe 3 and the outer pipe 4 in the process. , Is purified by the photocatalytic action of the photocatalyst 1,
The purified water 8 is discharged from the discharge port 7. Since the outer tube 4 and the flange 11 formed of vinyl chloride for cost reduction and weight reduction are protected by the light shielding layer 10 so as not to be directly exposed to the ultraviolet light from the light source 2,
The photocatalytic reaction vessel 9 can be used stably for a long period of time because it is unlikely to deteriorate over a long period of time.
【００１６】なお、遮光層１０の材料である酸化チタン
は、水に不溶で紫外光を透過しにくく、酸やアルカリに
対しても化学的に安定であり、かつ有機物の漏出を抑制
する効果もある。この遮光層１０は、酸化チタンの隙間
にコロイド状のシリカゾルが充填された状態になってい
るので、外管４やフランジ１１の内壁面に密着して耐剥
離性に優れており、強度も高い。しかも、予めポリビニ
ルアルコールを加えておいたスラリは、塗布・乾燥後に
収縮しても微細な隙間を生じにくいので、これも遮光層
１０の強度を高める要因となっている。Titanium oxide, which is the material of the light-shielding layer 10, is insoluble in water and hard to transmit ultraviolet light, chemically stable against acids and alkalis, and has an effect of suppressing leakage of organic substances. is there. Since this light-shielding layer 10 is in a state in which colloidal silica sol is filled in the gaps of titanium oxide, it is in close contact with the outer wall of the outer tube 4 and the inner wall of the flange 11, and is excellent in peeling resistance and has high strength. . Moreover, since the slurry to which polyvinyl alcohol has been added in advance does not easily form a fine gap even if it contracts after being applied and dried, this also increases the strength of the light shielding layer 10.
【００１７】図２は第２実施形態例に係る水処理装置の
光触媒反応容器を示す断面図であり、この実施形態例が
前述した第１実施形態例と相違する点は、遮光層１０を
外管４の内壁面の全面に被着させたことである。FIG. 2 is a sectional view showing the photocatalytic reaction container of the water treatment apparatus according to the second embodiment. The difference between this embodiment and the first embodiment is that the light shielding layer 10 is not provided. That is, the entire surface of the inner wall surface of the tube 4 is adhered.
【００１８】すなわち、図２に示すように、本実施形態
例に係る光触媒反応容器９では、外管４およびフランジ
１１の内壁面にはすべて遮光層１０が設けてあるので、
光触媒体１が遮光層１０の一部を覆うように配設されて
いる。外管１０の内壁面のうち光触媒体１に覆われてい
る領域は、他の領域のように光源２からの紫外光に直接
晒されるわけではないが、光触媒体１を透過する紫外光
もあるので、長期間使用すると紫外光の影響を受けて劣
化する恐れがある。そこで、本実施形態例のように光触
媒体１に覆われている領域にも遮光層１０を設けておけ
ば、外管４の劣化をより確実に防止することができるの
で、光触媒反応容器９の長寿命化が促進できる。That is, as shown in FIG. 2, in the photocatalytic reaction container 9 according to the present embodiment, the light shielding layer 10 is provided on all the inner wall surfaces of the outer tube 4 and the flange 11.
The photocatalyst 1 is arranged so as to cover a part of the light shielding layer 10. The region of the inner wall surface of the outer tube 10 which is covered with the photocatalyst 1 is not directly exposed to the ultraviolet light from the light source 2 like the other regions, but there is also the ultraviolet light that passes through the photocatalyst 1. Therefore, if it is used for a long time, it may be deteriorated due to the influence of ultraviolet light. Therefore, if the light-shielding layer 10 is provided also in the region covered with the photocatalyst 1 as in the present embodiment, the deterioration of the outer tube 4 can be prevented more reliably, so that the photocatalytic reaction container 9 can be prevented. A longer life can be promoted.
【００１９】なお、上述した各実施形態例における遮光
層１０を、他の手法によって形成することも可能であ
る。例えば、ゾル状の酸化チタン（多木化学，Ａ−６）
２００ｇにアルミナ（シーアイ化成，平均粒径３３ｎ
ｍ）粉末２０ｇを溶解した液を調整し、この液をコーテ
ィング領域に塗布して６０℃で乾燥させることにより、
遮光層１０となすことができる。The light shielding layer 10 in each of the above-described embodiments can be formed by another method. For example, sol-like titanium oxide (Taki Chemical, A-6)
Alumina to 200 g (CI formation, average particle size 33 n
m) Prepare a solution in which 20 g of powder is dissolved, apply this solution to the coating area and dry at 60 ° C.
It can be used as the light shielding layer 10.
【００２０】あるいは、予め、水１００ｍｌに重合度７
００のポリビニルアルコール（クラレポパール１１７）
１３ｇを溶かしておき、これに弱アルカリ性シリカゾル
（日産化学製，シリカゾル−Ｎ）６５０ｇを加えた後、
この溶液に酸化ジルコニウム粉末３００ｇを添加して調
整したスラリを、コーティング領域に塗布して乾燥させ
ることにより、遮光層１０となすことができる。Alternatively, a polymerization degree of 7 is added to 100 ml of water in advance.
Polyvinyl alcohol of 00 (Kuraray Popal 117)
After dissolving 13 g and adding 650 g of weakly alkaline silica sol (manufactured by Nissan Kagaku, silica sol-N),
The light-shielding layer 10 can be formed by applying a slurry prepared by adding 300 g of zirconium oxide powder to this solution and applying the slurry to the coating region and drying.
【００２１】あるいは、予め、水１００ｍｌに重合度７
００のポリビニルアルコール（クラレポパール１１７）
１３ｇを溶かしておき、これにジルコニアゾル（固形分
２０重量％）６５０ｇを加えた後、この溶液にαアルミ
ナ粉末（住友化学，平均粒径０．４μｍ）１５０ｇを添
加して調整したスラリを、コーティング領域に塗布して
乾燥させることにより、遮光層１０となすことができ
る。Alternatively, a polymerization degree of 7 is added to 100 ml of water in advance.
Polyvinyl alcohol of 00 (Kuraray Popal 117)
13 g was melted, 650 g of zirconia sol (solid content 20% by weight) was added thereto, and then 150 g of α-alumina powder (Sumitomo Chemical Co., average particle size 0.4 μm) was added to this solution to prepare a slurry. The light shielding layer 10 can be formed by applying the composition to the coating region and drying it.
【００２２】このほか、過酸化チタンの水溶液をコーテ
ィング領域に塗布して乾燥させるだけでも、遮光層１０
と同様の層を形成することはできる。In addition, the light-shielding layer 10 may be formed by simply applying an aqueous solution of titanium peroxide to the coating area and drying it.
It is possible to form a layer similar to.
【００２３】[0023]
【発明の効果】本発明は、以上説明したような形態で実
施され、以下に記載されるような効果を奏する。The present invention is carried out in the form as described above, and has the following effects.
【００２４】チタンやジルコニウム、アルミニウム等の
酸化物からなる遮光層を被着させている外管の内壁面の
コーティング領域が、長期間にわたって光源の紫外光か
ら保護されることになるので、有機樹脂製の外管を採用
しても長期間劣化を起こさず安定して使用でき、それゆ
え水処理装置の光触媒反応容器の低コスト化や軽量化を
図りつつ高い信頼性を確保することができる。Since the coating region on the inner wall surface of the outer tube on which the light-shielding layer made of an oxide such as titanium, zirconium or aluminum is adhered, is protected from the ultraviolet light of the light source for a long period of time, an organic resin is used. Even if a manufactured outer tube is adopted, it can be stably used without deterioration for a long period of time, and therefore, high reliability can be secured while achieving cost reduction and weight reduction of the photocatalytic reaction container of the water treatment device.
【図１】本発明の第１実施形態例に係る光触媒反応容器
を示す断面図である。FIG. 1 is a sectional view showing a photocatalytic reaction container according to a first embodiment of the present invention.
【図２】本発明の第２実施形態例に係る光触媒反応容器
を示す断面図である。FIG. 2 is a sectional view showing a photocatalytic reaction container according to a second embodiment of the present invention.
【図３】従来技術に係る光触媒反応容器を示す断面図で
ある。FIG. 3 is a cross-sectional view showing a photocatalytic reaction container according to a conventional technique.
１ 光触媒体 ２ 光源（殺菌灯） ３ 内管 ４ 外管 ５ 廃水 ６ 供給口 ７ 排出口 ８ 浄化水 ９ 光触媒反応容器 １０ 遮光層 １１ フランジ 1 Photocatalyst 2 light source (sterilization lamp) 3 inner tube 4 outer tube 5 wastewater 6 supply ports 7 outlet 8 purified water 9 Photocatalytic reaction vessel 10 Light-shielding layer 11 flange
フロントページの続き (72)発明者 横山 公一 広島県呉市宝町３番36号 バブコック日立 株式会社呉研究所内 Ｆターム(参考） 4D037 AA11 AB02 AB03 AB04 BA18 CA11 4D050 AA13 AB04 AB06 AB07 BC06 BC09 BD02 4G069 AA03 BA04B BA48A CA05 DA06 EA08 Continued front page (72) Inventor Koichi Yokoyama Babcock Hitachi 3-36 Takaracho, Kure City, Hiroshima Prefecture Kure Institute Co., Ltd. F-term (reference) 4D037 AA11 AB02 AB03 AB04 BA18 CA11 4D050 AA13 AB04 AB06 AB07 BC06 BC09 BD02 4G069 AA03 BA04B BA48A CA05 DA06 EA08
Claims (3)
外管とからなる２重管構造の円筒容器と、前記内管の内
部に配置された光源と、前記外管の内壁面に沿って設け
られ前記光源により照射される光触媒体とを備え、前記
内管と前記外管との間を流れる被処理水を光触媒作用で
浄化する水処理装置の光触媒反応容器において、 前記外管の内壁面の全面、もしくは該内壁面のうち前記
光触媒体が存しない領域に、チタンの酸化物とジルコニ
ウムの酸化物とアルミニウムの酸化物のいずれか一種以
上を含む遮光層を被着させたことを特徴とする水処理装
置の光触媒反応容器。1. A cylindrical container having a double tube structure composed of an inner tube for transmitting ultraviolet light and an outer tube made of organic resin, a light source arranged inside the inner tube, and an inner wall surface of the outer tube. In a photocatalytic reaction container of a water treatment device, which is provided along with a photocatalyst irradiated by the light source, and purifies the water to be treated flowing between the inner pipe and the outer pipe by a photocatalytic action, A light-shielding layer containing at least one of an oxide of titanium, an oxide of zirconium, and an oxide of aluminum was deposited on the entire inner wall surface or a region of the inner wall where the photocatalyst does not exist. A photocatalytic reaction container for a water treatment device.
ンジの内壁面に、前記遮光層を被着させたことを特徴と
する請求項１記載の水処理装置の光触媒反応容器。2. The photocatalytic reaction container of the water treatment apparatus according to claim 1, wherein the light shielding layer is adhered to an inner wall surface of a flange whose both ends of the cylindrical container are closed.
とアルミニウムの酸化物のいずれか一種以上の粉末と、
チタニアとアルミナとジルコニアとシリカのいずれか一
種以上のコロイド状物と、必要に応じてポリビニルアル
コールとを混ぜ合わせて形成されたスラリを、前記外管
の内壁面に塗布して乾燥させたものを、前記遮光層とな
したことを特徴とする請求項１または２記載の水処理装
置の光触媒反応容器。3. A powder of at least one of titanium oxide, zirconium oxide, and aluminum oxide,
Any one or more colloidal substances of titania, alumina, zirconia, and silica, and a slurry formed by mixing polyvinyl alcohol as needed, and applied to the inner wall surface of the outer tube and dried. The photocatalytic reaction container of the water treatment device according to claim 1 or 2, wherein the light shielding layer is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001371615A JP2003170162A (en) | 2001-12-05 | 2001-12-05 | Photocatalytic reaction chamber of water treating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001371615A JP2003170162A (en) | 2001-12-05 | 2001-12-05 | Photocatalytic reaction chamber of water treating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003170162A true JP2003170162A (en) | 2003-06-17 |
Family
ID=19180635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001371615A Pending JP2003170162A (en) | 2001-12-05 | 2001-12-05 | Photocatalytic reaction chamber of water treating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003170162A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012125736A (en) * | 2010-12-17 | 2012-07-05 | Panasonic Corp | Ballast water treatment apparatus |
| CN109019756A (en) * | 2018-09-12 | 2018-12-18 | 华南理工大学 | A kind of photocatalyst reaction vessel and photocatalysis performance test device |
-
2001
- 2001-12-05 JP JP2001371615A patent/JP2003170162A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012125736A (en) * | 2010-12-17 | 2012-07-05 | Panasonic Corp | Ballast water treatment apparatus |
| CN109019756A (en) * | 2018-09-12 | 2018-12-18 | 华南理工大学 | A kind of photocatalyst reaction vessel and photocatalysis performance test device |
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