WO2005099778A1 - Procédé de décomposition de substances nocives et appareil de décomposition de substances nocives - Google Patents

Procédé de décomposition de substances nocives et appareil de décomposition de substances nocives Download PDF

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Publication number
WO2005099778A1
WO2005099778A1 PCT/JP2005/006159 JP2005006159W WO2005099778A1 WO 2005099778 A1 WO2005099778 A1 WO 2005099778A1 JP 2005006159 W JP2005006159 W JP 2005006159W WO 2005099778 A1 WO2005099778 A1 WO 2005099778A1
Authority
WO
WIPO (PCT)
Prior art keywords
photocatalyst
light
decomposing
harmful substance
gas
Prior art date
Application number
PCT/JP2005/006159
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Noguchi
Original Assignee
Kabushiki Kaisha Meidensha
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kabushiki Kaisha Meidensha filed Critical Kabushiki Kaisha Meidensha
Priority to KR1020087020329A priority Critical patent/KR100930837B1/ko
Priority to CN200580011122XA priority patent/CN1960769B/zh
Publication of WO2005099778A1 publication Critical patent/WO2005099778A1/fr
Priority to HK07106073.0A priority patent/HK1101361A1/xx

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00Disinfection, sterilisation or deodorisation of air
    • A61L9/16Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18Radiation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00Disinfection, sterilisation or deodorisation of air
    • A61L9/16Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18Radiation
    • A61L9/20Ultra-violet radiation
    • A61L9/205Ultra-violet radiation using a photocatalyst or photosensitiser
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00Disinfection, sterilisation or deodorisation of air
    • A61L9/01Deodorant compositions
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00Disinfection, sterilisation or deodorisation of air
    • A61L9/16Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18Radiation
    • A61L9/20Ultra-violet radiation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/88Handling or mounting catalysts
    • B01D53/885Devices in general for catalytic purification of waste gases
    • B01J35/39
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2255/00Catalysts
    • B01D2255/80Type of catalytic reaction
    • B01D2255/802Photocatalytic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/90Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
    • B01J35/59

Definitions

  • the present invention relates to a technology for collecting harmful gases such as odor and making them harmless, and more particularly to one using a photocatalyst.
  • a photocatalyst represented by titanium oxide or the like When a photocatalyst represented by titanium oxide or the like is irradiated with light having energy equal to or higher than the band gap of the photocatalyst, holes and electrons are generated inside the photocatalyst. The holes and electrons thus generated are diffused to the surface of the photocatalyst, and react with the substance adsorbed on the surface of the photocatalyst and the substance present in the vicinity of the surface of the photocatalyst. Many air purifiers and the like that utilize the properties of such photocatalysts have been commercialized, and many patent applications have been made.
  • titanium oxide photocatalyst is most frequently used because of its excellent oxidizing power and chemical stability. With this titanium oxide photocatalyst, the above-mentioned photocatalytic reaction proceeds by absorbing light having a wavelength of about 400 or less.
  • FIG. 3 is a plan view of an air purifier using both ozone and a photocatalyst.
  • this air purifier includes a filter portion 31, an ozone generation portion 32, a photocatalytic device 33, and an activated carbon portion 34 in this order from the upstream to the downstream of the flow path of the air to be treated.
  • the photocatalytic device 33 includes a case member for forming a flow path of air, a photocatalytic filter having a photocatalytic functional layer supported on a substrate having a large number of pores provided inside the case member, and a photocatalytic filter Means for irradiating ultraviolet light. Then, the photocatalyst filter is disposed such that the total amount of air to be processed flows through the photocatalyst filter.
  • FIG. 4 is a longitudinal cross-sectional view of an air purification apparatus provided with a deodorizing filter in which an adsorbent containing at least one of activated carbon and zeolite and a photocatalyst are used in combination.
  • the air purification device has a cylindrical deodorizing filter 41 including a photocatalyst, and an excitation light source 42 is disposed on the upstream side of the deodorizing filter 41 in proximity to the deodorizing filter 41 and the deodorizing filter 41 is excited. It is configured to rotate so that the irradiation position of the light from the light source 42 changes.
  • the gas adsorbed to the whole of the deodorizing filter 41 can be treated and decomposed. Therefore, the regeneration rate of the deodorizing filter 41 can be improved, and the initial excellent performance can be sustained for a long time (for example, see Patent Document 2).
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2002-272824
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2002-263175
  • the photocatalytic reaction proceeds only on the surface of the photocatalyst and in the vicinity of the surface of the photocatalyst. For this reason, in the case of decomposing and purifying harmful gases at extremely dilute concentrations of ppm or ppb level by photocatalyst, the process of diffusing the harmful gas on the photocatalyst surface tends to be the rate-limiting step of the decomposition and purification reaction. In particular, there is a problem that the decomposition and cleaning rate is significantly slowed when the harmful gas having a low adsorptivity to the photocatalyst is used as the target of decomposition and purification.
  • Patent Document 1 discloses the combined use with ozone, but the improvement of the cleaning rate by the combined use with ozone is not necessarily clarified.
  • Patent Document 2 describes the combined use of a photocatalyst and an adsorbent containing at least one of activated carbon and zeolite, the use of such an adsorbent is also possible. Since the harmful substances can not be adsorbed after the adsorbent reaches adsorption saturation, the purification action becomes low, and the adsorbent needs to be replaced. The used adsorbents become general waste and industrial waste, and there was a problem in terms of waste increase.
  • An object of the present invention is to provide a technology for decomposing harmful substances with high efficiency for decomposing and removing harmful substances, or a technology for decomposing harmful substances that requires only a small amount of waste, which solves the above problems.
  • the concentration of odorants generated in living space is on the order of ppb to several ppm, and in the case of decomposing such a lean concentration gas, the decomposition rate of the gas is proportional to the gas concentration It is known to grow. Also, in relation to the light intensity and the decomposition rate, the power of a cold cathode lamp for black light and photocatalyst is usually several mWZ cm 2 order light emitted In the case of the intensity, the higher the light intensity, the higher the decomposition rate. From these facts, it is concluded that the higher the light intensity and gas concentration, the higher the decomposition rate, and the stronger the effect of removing harmful substances such as deodorizing effect.
  • a decomposing device for harmful substances such as deodorizing devices composed of a member that carries a photocatalyst such as a ceramic filter coated with a photocatalyst and a light source
  • a gas containing harmful substances such as odor gas
  • the gas containing harmful substances has the highest gas concentration and the light intensity is high. Since the highest degree of contact is achieved by passing through the surface of a member carrying a photocatalyst such as a ceramic filter, the reaction efficiency can be increased.
  • the light source between members supporting photocatalysts such as two ceramic filters, light is reflected by the member supporting photocatalysts such as one ceramic filter and light is reflected on the other side such as ceramic filters etc. Since the light is incident on the member carrying the photocatalyst, it can be used to advance the photocatalytic reaction on the photocatalyst coated on the surface, and it becomes possible to increase the utilization efficiency of light.
  • the surfaces of members carrying a photocatalyst are arranged such that the light irradiated to the surfaces is reflected to the other surfaces, and a light source disposed in a region surrounded by these surfaces is used.
  • the light irradiated to the surface of the member carrying the photocatalyst contributes to the photocatalytic reaction or reflects the other photocatalyst even if it is reflected by the method of decomposing the harmful substance by irradiating the photocatalyst with light and decomposing the harmful substance by the photocatalyst. Since the light is irradiated to the surface of the carried member, the utilization efficiency of light energy can be improved.
  • the surfaces of members carrying a photocatalyst are arranged opposite to each other, and the photocatalyst is irradiated with light from a light source disposed between these surfaces to decompose harmful substances by the photocatalyst.
  • the light irradiated to the surface of the member carrying the photocatalyst contributes to the photocatalytic reaction, or even if it is reflected, the light is irradiated to the surface of the member carrying the other photocatalyst. Energy efficiency can be improved.
  • a light source is installed inside a tubular member carrying a photocatalyst, and the photocatalyst is supported by a method of decomposing harmful substances by irradiating the photocatalyst with the light source to decompose the harmful substance by the photocatalyst.
  • the light irradiated to the surface of the member which has been used contributes to the photocatalytic reaction, or even if it is reflected, it is irradiated to the surface of the member carrying another photocatalyst, thereby improving the utilization efficiency of the light energy.
  • harmful substances are filtered or formed by a method of decomposing a harmful substance, which is a member carrying the photocatalyst, a tubular member, a filter-like member, or a member capable of passing porous or other gases. It can be decomposed and removed as it passes through members that can pass other gases.
  • a porous material when a porous material is used, the surface area of the member is increased, so the amount of photocatalyst present is also increased, and the decomposition and removal efficiency of harmful substances is increased.
  • a harmful substance can pass, it is applicable.
  • the gas carrying the photocatalyst is carried so that the gas containing the harmful substance first passes through the member carrying the photocatalyst, or the surface of the cylindrical member having the highest light irradiation intensity.
  • the harmful substance can be efficiently removed by decomposing the harmful substance introduced into the rod-like member.
  • the member carrying the photocatalyst, or the tubular member made of ceramic can be recovered performance by washing the member carrying the photocatalyst or the tubular member with water by the method of decomposing the harmful substance. The amount is small.
  • the harmful substance decomposing apparatus has a flow decomposing substance of the harmful substance decomposing apparatus in which a straightening vane is installed in the gas flow path in the harmful substance decomposing apparatus, the flow resistance of the gas becomes large and the gas flow rate is small
  • the gas can be circulated throughout the member supporting the photocatalyst, the contact efficiency between the harmful substance and the photocatalyst becomes high, and the decomposition and removal effect of the harmful substance can be improved.
  • FIG. 1 is a block diagram of a deodorizing apparatus.
  • FIG. 2 is a block diagram of a deodorizing apparatus.
  • FIG. 3 is a plan view of an air purifier using ozone and a photocatalyst in combination.
  • FIG. 4 is a longitudinal sectional view of an air purifier using an adsorbent containing at least one of activated carbon and zeolite in combination with a photocatalyst.
  • FIG. 1 The block diagram of the deodorizing apparatus used for FIG. 1 at 1st Embodiment is shown.
  • FIG. 1 (a) is a cross-sectional view of the deodorizing apparatus, and (b) is a side view of the deodorizing apparatus.
  • This deodorizing apparatus combines a photocatalyst-coated ceramic filter with a light source for exciting the photocatalytic reaction so that a light source can be effectively used.
  • a light source is interposed between two ceramic filters. Deploy. Furthermore, the gas is introduced between the two ceramic filters so that the gas containing the odorous gas first passes through the surface of the ceramic filter where the light irradiation intensity is highest, and the force also passes through the ceramic filter.
  • the deodorizing device includes an air inlet 1 for introducing a gas installed at the lower part of the deodorizing device, a fan 2 for driving a gas introduced at an upper portion of the air outlet 1, and a deodorizing device.
  • gas is introduced from the air inlet 1 and reaches the central portion of the deodorizing device in which the lamp 3 as a light source is installed. Then, it passes ceramic filters 4, 5 arranged on both sides of the lamp 3. At the time of this passage, the light-irradiated photocatalyst on the surface of the ceramic filters 4 and 5 comes in contact with the gas, whereby the odor component gas in the gas is decomposed.
  • the gas from which the odor component gas has been decomposed and removed by passing through the ceramic filters 4 and 5 is the side chamber 6 or 7 To the side rooms 8, 9 and exhaust from the exhaust ports 10, 11.
  • the gas with the highest concentration of the odor component gas is irradiated with the strongest light of the ceramic filters 4 and 5. It is possible to break down harmful substances efficiently by passing through the In addition, by arranging a light source between two ceramic filters, light emitted to one of the ceramic filters is reflected to the other ceramic filter, thereby improving the utilization efficiency of light energy. be able to.
  • the lamps 3 serving as the light source may be provided in a single piece instead of a plurality of vertically arranged filters as long as the ceramic filters 4 and 5 can be uniformly irradiated.
  • titanium oxide is most preferable as the photocatalyst applied to the ceramic filter, but zinc oxide, strontium titanate, barium titanate, or a composite compound obtained by combining these photocatalysts, etc. is suitable. And those having a photocatalytic function can be used.
  • the number of ceramic filters is not limited to two, and any number of ceramic filters may be installed as long as the irradiated light is reflected by the other ceramic filters.
  • the lamp 3 of the light source may be installed inside a cylindrical ceramic filter such as a cylindrical shape.
  • FIG. 1 The block diagram of the deodorizing apparatus used for 2nd Embodiment is shown in FIG. In FIG. 1, (a) is a cross-sectional view of the deodorizing apparatus, and (b) is a side view of the deodorizing apparatus.
  • This deodorizing apparatus is the deodorizing apparatus of the first embodiment, in which a plurality of baffles 12 are attached to the side chambers 6, 7 so as to be perpendicular to the gas moving upward.
  • the flow resistance of the gas is increased, and the gas can uniformly flow in the side chambers 6 and 7 even when the gas flow rate is small. This action makes it possible to circulate the gas throughout the ceramic filters 4 and 5, and the contact efficiency between the odor component gas and the photocatalyst becomes high, and the deodorizing effect can be improved.
  • the rectifying plate 12 may not be perpendicular to the gas moving upward as long as the above effect can be obtained, and one plate may be provided in each of the side chambers 6 and 7. One by one.

Abstract

Il est prévu un procédé de décomposition de substances nocives dans lequel un élément support comme un filtre céramique auquel on applique un photocatalyseur comme de l’oxyde de titane en combinaison avec une source lumineuse générant de la lumière pour induire une réaction photocatalytique. Pour utiliser efficacement la lumière émise de la source lumineuse pour la réaction photocatalytique dans la couche photocatalytique, deux éléments comme des filtres céramiques supportant le photocatalyseur sont disposés l'un en face de l'autre et la source lumineuse est placée entre les deux éléments pour irradier de lumière le photocatalyseur. On injecte une substance nocive à la surface du photocatalyseur ayant atteint une certaine puissance afin de décomposer la substance nocive en irradiant de la lumière.
PCT/JP2005/006159 2004-04-14 2005-03-30 Procédé de décomposition de substances nocives et appareil de décomposition de substances nocives WO2005099778A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020087020329A KR100930837B1 (ko) 2004-04-14 2005-03-30 유해물질 분해방법
CN200580011122XA CN1960769B (zh) 2004-04-14 2005-03-30 有害物质的分解方法及有害物质分解装置
HK07106073.0A HK1101361A1 (en) 2004-04-14 2007-06-07 Method for decomposing harmful substance and apparatus for decomposing harmful substance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004-118499 2004-04-14
JP2004118499A JP2005296859A (ja) 2004-04-14 2004-04-14 有害物質の分解方法および有害物質分解装置

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Publication Number Publication Date
WO2005099778A1 true WO2005099778A1 (fr) 2005-10-27

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PCT/JP2005/006159 WO2005099778A1 (fr) 2004-04-14 2005-03-30 Procédé de décomposition de substances nocives et appareil de décomposition de substances nocives

Country Status (6)

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JP (1) JP2005296859A (fr)
KR (3) KR20090012284A (fr)
CN (1) CN1960769B (fr)
HK (1) HK1101361A1 (fr)
TW (1) TW200539900A (fr)
WO (1) WO2005099778A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3488155A4 (fr) * 2016-10-19 2019-12-11 Samsung Electronics Co., Ltd. Filtre photocatalyseur et climatiseur comprenant celui-ci
US10722605B2 (en) 2016-10-19 2020-07-28 Samsung Electronics Co., Ltd. Photocatalyst filter and air conditioner including the same

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2942965A1 (fr) * 2009-03-16 2010-09-17 Biowind Nouveau dispositif pour le traitement de l'air
JP6052966B2 (ja) * 2012-08-31 2016-12-27 株式会社ニッキ 気体用フィルタ装置
KR101667235B1 (ko) * 2016-04-25 2016-10-18 (주)유성엔비텍 오존 활성화 반응존을 갖는 탈취 유니트
KR101705837B1 (ko) * 2016-10-20 2017-02-10 주식회사 포시 살균과 세정 기능을 갖는 공기정화필터
KR20180124569A (ko) * 2017-05-12 2018-11-21 서울바이오시스 주식회사 유체 처리 장치
CN108889120A (zh) * 2018-07-24 2018-11-27 深圳市必发达科技有限公司 光催化空气净化器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1015351A (ja) * 1996-07-05 1998-01-20 Takasago Thermal Eng Co Ltd 空気浄化用の触媒体と空気浄化装置
JP2000210570A (ja) * 1999-01-26 2000-08-02 Hitachi Ltd 光触媒装置
JP2003245660A (ja) * 2002-02-26 2003-09-02 Meidensha Corp 水処理槽

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KR0153511B1 (ko) * 1995-12-29 1998-10-15 김태구 자동차 로커패널의 강성 취부구조
CN2339914Y (zh) * 1997-11-28 1999-09-22 中国科学院光电技术研究所 空气净化装置
CN2361283Y (zh) * 1998-09-23 2000-02-02 中国建筑材料科学研究院 光催化杀菌、除臭的空气净化组件

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1015351A (ja) * 1996-07-05 1998-01-20 Takasago Thermal Eng Co Ltd 空気浄化用の触媒体と空気浄化装置
JP2000210570A (ja) * 1999-01-26 2000-08-02 Hitachi Ltd 光触媒装置
JP2003245660A (ja) * 2002-02-26 2003-09-02 Meidensha Corp 水処理槽

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3488155A4 (fr) * 2016-10-19 2019-12-11 Samsung Electronics Co., Ltd. Filtre photocatalyseur et climatiseur comprenant celui-ci
US10722605B2 (en) 2016-10-19 2020-07-28 Samsung Electronics Co., Ltd. Photocatalyst filter and air conditioner including the same
US11701446B2 (en) 2016-10-19 2023-07-18 Samsung Electronics Co., Ltd. Photocatalyst filter and air conditioner including the same

Also Published As

Publication number Publication date
KR20090012284A (ko) 2009-02-02
CN1960769A (zh) 2007-05-09
KR20060135884A (ko) 2006-12-29
HK1101361A1 (en) 2007-10-18
JP2005296859A (ja) 2005-10-27
CN1960769B (zh) 2010-05-12
KR20080080241A (ko) 2008-09-02
TW200539900A (en) 2005-12-16
KR100930837B1 (ko) 2009-12-10

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