JP2000070671A - Air purifying method - Google Patents
Air purifying methodInfo
- Publication number
- JP2000070671A JP2000070671A JP10244513A JP24451398A JP2000070671A JP 2000070671 A JP2000070671 A JP 2000070671A JP 10244513 A JP10244513 A JP 10244513A JP 24451398 A JP24451398 A JP 24451398A JP 2000070671 A JP2000070671 A JP 2000070671A
- Authority
- JP
- Japan
- Prior art keywords
- air
- photocatalyst
- treatment
- dehumidification
- air cleaning
- 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
- 238000000034 method Methods 0.000 title claims description 48
- 239000011941 photocatalyst Substances 0.000 claims abstract description 49
- 238000011282 treatment Methods 0.000 claims abstract description 32
- 239000000126 substance Substances 0.000 claims abstract description 21
- 238000007791 dehumidification Methods 0.000 claims abstract description 17
- 238000004887 air purification Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 230000001877 deodorizing effect Effects 0.000 abstract description 19
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 2
- 230000001699 photocatalysis Effects 0.000 description 17
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 12
- 238000004332 deodorization Methods 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 4
- WQOXQRCZOLPYPM-UHFFFAOYSA-N dimethyl disulfide Chemical compound CSSC WQOXQRCZOLPYPM-UHFFFAOYSA-N 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical compound C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 description 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- -1 acetaldehyde, ketones Chemical class 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 2
- 230000009965 odorless effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- ZFRKQXVRDFCRJG-UHFFFAOYSA-N skatole Chemical compound C1=CC=C2C(C)=CNC2=C1 ZFRKQXVRDFCRJG-UHFFFAOYSA-N 0.000 description 2
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 2
- 229910001930 tungsten oxide Inorganic materials 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 description 1
- MPCRDALPQLDDFX-UHFFFAOYSA-L Magnesium perchlorate Chemical compound [Mg+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O MPCRDALPQLDDFX-UHFFFAOYSA-L 0.000 description 1
- 244000061176 Nicotiana tabacum Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000000843 anti-fungal effect Effects 0.000 description 1
- 230000000840 anti-viral effect Effects 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- PZOUSPYUWWUPPK-UHFFFAOYSA-N indole Natural products CC1=CC=CC2=C1C=CN2 PZOUSPYUWWUPPK-UHFFFAOYSA-N 0.000 description 1
- RKJUIXBNRJVNHR-UHFFFAOYSA-N indolenine Natural products C1=CC=C2CC=NC2=C1 RKJUIXBNRJVNHR-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229940074386 skatole Drugs 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、排水処理場、廃棄
物処理場、厨房、トイレ、一般家庭などの各種建造物内
等の悪臭および細菌類などの有害物質を除去するための
空気清浄化方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to air purification for removing odorous substances and harmful substances such as bacteria in various buildings such as wastewater treatment plants, waste treatment plants, kitchens, toilets, and general households. It is about the method.
【０００２】[0002]
【従来の技術】食品臭、たばこ臭、ペット臭、便所臭な
どの悪臭の成分は、多種多様であり、代表的なものとし
て、アンモニア、アミン類、インドール、スカトールな
どの窒素化合物、硫化水素、メチルメルカプタン、硫化
メチル、二硫化メチル、二硫化ジメチルなどの硫黄化合
物、ホルムアルデヒド、アセトアルデヒドなどのアルデ
ヒド類、アセトンなどのケトン類、メタノール、エタノ
ールなどのアルコール類がある。2. Description of the Related Art The components of malodor such as food odor, tobacco odor, pet odor, and toilet odor are various, and typical ones are ammonia, amines, nitrogen compounds such as indole and skatole, hydrogen sulfide, There are sulfur compounds such as methyl mercaptan, methyl sulfide, methyl disulfide and dimethyl disulfide, aldehydes such as formaldehyde and acetaldehyde, ketones such as acetone, and alcohols such as methanol and ethanol.
【０００３】従来、このような悪臭を脱臭する方法とし
て、悪臭物質と薬剤とを化学反応させる方法、芳香剤で
悪臭物質をマスキングする方法、活性炭、ゼオライトな
どの吸着剤にて悪臭物質を吸着する方法、または、これ
らの方法を組み合わせて行う方法があった。このような
各種の脱臭方法が使用されているが、薬剤及び芳香剤
は、共に悪臭物質と反応した後での再生はほとんど不可
能である。また、吸着剤の場合も、吸着容量が飽和する
と脱臭性能は著しく低下する。従って、どのような方法
においても、新しいものと定期的に交換しなければなら
ない。Heretofore, as a method of deodorizing such malodor, a method of chemically reacting a malodorous substance with a medicine, a method of masking a malodorous substance with an aromatic agent, and adsorption of a malodorous substance by an adsorbent such as activated carbon and zeolite have been proposed. There has been a method or a method of combining these methods. Although various such deodorizing methods have been used, it is almost impossible to regenerate both the drug and the fragrance after reacting with the malodorous substance. Also, in the case of an adsorbent, when the adsorption capacity is saturated, the deodorizing performance is significantly reduced. Therefore, any method must be replaced periodically with a new one.
【０００４】そこで、光触媒とランプとを用いて、脱臭
機能を果たすようにした脱臭方法が開発されている。光
触媒は光エネルギーを化学エネルギーに変える物質であ
り、具体的には、酸化タングステン、酸化チタン、酸化
イットリウム、酸化亜鉛などの金属酸化物またはこれら
の混合物からなる半導体である。この脱臭方法では、ラ
ンプから紫外線を光触媒に照射してその光エネルギーに
て光触媒を活性化させ、酸化反応を促進させて悪臭物質
を無臭物質に変換する。紫外線照射によって光触媒が励
起されると、光触媒から電子が飛び出し表面に吸着した
酸素を攻撃してＯ2 -を生成し、また、正孔が空気中の水
分を攻撃して、ＯＨラジカルを生成し、これらの活性種
により悪臭物質の酸化反応が促進され、種々の悪臭物質
が、具体的には水、二酸化炭素などの無臭物質まで最終
的に分解される。Therefore, a deodorizing method using a photocatalyst and a lamp to perform a deodorizing function has been developed. The photocatalyst is a substance that converts light energy into chemical energy, and is specifically a semiconductor made of a metal oxide such as tungsten oxide, titanium oxide, yttrium oxide, zinc oxide, or a mixture thereof. In this deodorizing method, ultraviolet light is irradiated on a photocatalyst from a lamp to activate the photocatalyst with the light energy, thereby promoting an oxidation reaction to convert a malodorous substance into an odorless substance. When the photocatalyst is excited by the ultraviolet radiation, attacking the oxygen electrons from the photocatalyst is adsorbed on the surface popping with the O 2 - generate, also holes attacks the moisture in the air to produce OH radicals Oxidation of malodorous substances is promoted by these active species, and various malodorous substances are finally decomposed into odorless substances such as water and carbon dioxide.
【０００５】しかしながら、光触媒を用いた脱臭方法に
おいては水処理場や厨房、温水プールの更衣室など比較
的湿度が高い環境において充分な脱臭効果が得られ難い
という問題があった。However, the deodorizing method using a photocatalyst has a problem that it is difficult to obtain a sufficient deodorizing effect in a relatively humid environment such as a water treatment plant, a kitchen, and a changing room of a heated pool.
【０００６】[0006]
【発明が解決しようとする課題】本発明の課題は、光触
媒による脱臭の効率を著しく高めた空気清浄化方法の提
供である。SUMMARY OF THE INVENTION An object of the present invention is to provide an air cleaning method in which the efficiency of photocatalytic deodorization is significantly improved.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、上記課題
を解決するため鋭意検討を重ねた結果、本発明に到達し
たものである。Means for Solving the Problems The present inventors have made intensive studies to solve the above problems, and as a result, have reached the present invention.
【０００８】（１）空気中に含まれる有害物質を光触媒
によって分解、除去する空気清浄化方法において、空気
清浄化処理を受ける前の汚染空気中の水分を低下させた
後に光触媒によって清浄化処理することを特徴とする空
気清浄化方法。(1) In an air cleaning method for decomposing and removing harmful substances contained in the air by a photocatalyst, the water in the contaminated air is reduced before the air cleaning process is performed, and then the cleaning process is performed by the photocatalyst. An air cleaning method characterized by the above-mentioned.
【０００９】（２）上記の発明（１）において、汚染空
気の除湿処理前の相対湿度が６０％以上、光触媒による
空気清浄化前の相対湿度が４５％以下であることを特徴
とする空気清浄化方法。(2) In the above invention (1), the relative humidity before the dehumidification treatment of the contaminated air is 60% or more, and the relative humidity before the air purification by the photocatalyst is 45% or less. Method.
【００１０】（３）上記の発明（１）または（２）にお
いて、汚染空気の除湿処理前の絶対湿度Ａ（ｇ／ｍ3）
と光触媒による空気清浄化前の絶対湿度Ｂ（ｇ／ｍ3）
の関係が、Ａ／Ｂ≧１．５であることを特徴とする空気
清浄化方法。(3) In the above invention (1) or (2), the absolute humidity A (g / m 3 ) before the dehumidifying treatment of the contaminated air.
And absolute humidity B (g / m 3 ) before air cleaning with photocatalyst
Is an air purification method, wherein A / B ≧ 1.5.
【００１１】[0011]
【発明の実施の形態】本発明は、光触媒によって処理す
る前の空気中の水分を低下させることによって光触媒に
よる脱臭の効率を著しく高めた空気清浄化方法を提供す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an air cleaning method in which the efficiency of photocatalytic deodorization is significantly improved by reducing the moisture in the air before being treated with a photocatalyst.
【００１２】本発明の空気清浄化方法は、空気清浄化処
理を受ける前の汚染空気中に共雑している水分を除去し
た後に光触媒によって清浄化処理するものであり、光触
媒による空気中有害物質の分解除去を著しく高効率に行
うことが可能である。According to the air cleaning method of the present invention, the water contaminating the contaminated air before being subjected to the air cleaning treatment is removed, and then the cleaning treatment is performed by a photocatalyst. Can be decomposed and removed with extremely high efficiency.
【００１３】本発明に係わる光触媒とは、０．５〜５ｅ
Ｖ、好ましくは１〜４ｅＶの禁止帯幅を有する、光触媒
反応をもたらす光反応性半導体である。本発明に係わる
このような光触媒としては、酸化亜鉛、酸化タングステ
ン、酸化チタン、及び酸化セリウム等の金属酸化物粒子
が挙げられるが、殊に酸化チタンはその構造安定性、光
反応性有害物除去能、更には取扱い上の安全性等から生
活空間において使用するには最も適しており、本発明に
係わる光触媒として有利に用いられる。The photocatalyst according to the present invention is 0.5 to 5 e
V, preferably a photoreactive semiconductor that provides a photocatalytic reaction with a band gap of 1-4 eV. Examples of such a photocatalyst according to the present invention include metal oxide particles such as zinc oxide, tungsten oxide, titanium oxide, and cerium oxide. In particular, titanium oxide has its structural stability and photoreactive harmful substance removal. The photocatalyst according to the present invention is most suitable for use in a living space because of its performance and safety in handling.
【００１４】本発明に係わる光触媒は取り扱いの簡便さ
から光触媒を担持した部材または光触媒からなる部材に
成形することが好ましい。この光触媒部材は光触媒の他
に活性炭、ゼオライトなどの吸着剤を含むものが好まし
く、特に、光触媒を担持した繊維状シートからなる部材
であることが好ましい。The photocatalyst according to the present invention is preferably formed into a member supporting the photocatalyst or a member comprising the photocatalyst from the viewpoint of easy handling. The photocatalyst member preferably contains an adsorbent such as activated carbon and zeolite in addition to the photocatalyst, and is particularly preferably a member made of a fibrous sheet supporting the photocatalyst.
【００１５】光触媒部材の具体例として、平坦なシート
状、平坦な板状、波板状などの他に、通風性を有するハ
ニカム状、コルゲート状、フォーム状などの多孔質体等
を挙げることができる。As specific examples of the photocatalyst member, in addition to a flat sheet shape, a flat plate shape, a corrugated plate shape, and the like, a porous body such as a honeycomb shape, a corrugate shape, a foam shape, etc. having air permeability can be given. it can.
【００１６】本発明の汚染空気中の水分を低下させる方
法は、乾燥剤または除湿剤などの薬剤での処理や除湿機
などの装置による処理を挙げることができる。乾燥剤ま
たは除湿剤の具体例としては、シリカゲル、塩化カルシ
ウム、粒状ソーダ石灰、棒状水酸化ナトリウム、濃硫
酸、過塩素酸マグネシウム、五酸化リンなどがある。The method of reducing the water content in the contaminated air according to the present invention includes treatment with a chemical such as a desiccant or dehumidifier, and treatment with a device such as a dehumidifier. Specific examples of the desiccant or dehumidifier include silica gel, calcium chloride, granular soda lime, bar-like sodium hydroxide, concentrated sulfuric acid, magnesium perchlorate, phosphorus pentoxide, and the like.
【００１７】本発明の空気清浄化方法は、汚染空気の除
湿処理前の相対湿度が６０％以上、除湿後の光触媒によ
る空気清浄化前の相対湿度が４５％以下であることが好
ましい。除湿処理前の相対湿度が６０％未満、特に４５
％以下の場合には、除湿による光触媒脱臭の効率化が低
く、除湿を行うメリットが少ない。また、除湿後の光触
媒による空気清浄化前の相対湿度が４５％を越え、特に
６０％以上の場合には、光触媒の反応効率が低く、充分
な脱臭効果が得難い。In the air cleaning method of the present invention, the relative humidity of the contaminated air before the dehumidification treatment is preferably 60% or more, and the relative humidity before the air purification by the photocatalyst after the dehumidification is 45% or less. Relative humidity before dehumidification is less than 60%, especially 45%
% Or less, the efficiency of photocatalytic deodorization by dehumidification is low, and there is little merit in performing dehumidification. Further, when the relative humidity before air cleaning by the photocatalyst after dehumidification exceeds 45%, especially when it is 60% or more, the reaction efficiency of the photocatalyst is low, and it is difficult to obtain a sufficient deodorizing effect.
【００１８】本発明の空気清浄化方法は、汚染空気の除
湿処理前の絶対湿度Ａ（ｇ／ｍ3）と光触媒による空気
清浄化前の絶対湿度Ｂ（ｇ／ｍ3）の関係が、Ａ／Ｂ≧
１．５であることが好ましく、Ａ／Ｂ≧２であることが
更に好ましい。Ａ／Ｂ＜１．５の場合には、汚染空気中
の水分の除去が不十分のため、光触媒による脱臭の効率
向上が比較的少なく、本発明の目的を充分には達成でき
ない。In the air cleaning method of the present invention, the relationship between the absolute humidity A (g / m 3 ) before the dehumidifying treatment of the contaminated air and the absolute humidity B (g / m 3 ) before the air cleaning by the photocatalyst is A / B ≧
It is preferably 1.5, and more preferably A / B ≧ 2. In the case of A / B <1.5, since the removal of moisture in contaminated air is insufficient, the efficiency of deodorization by the photocatalyst is relatively small, and the object of the present invention cannot be sufficiently achieved.
【００１９】本発明の空気清浄化方法においては、光触
媒部材に励起光を照射する必要があり、励起光照射の手
段としては、専用光源を用いる照射、屋外や窓際での日
光の照射、および室内照明光など他の目的で使用される
光の利用などを挙げることができる。励起光の照射は連
続または断続のいずれを採ることも可能である。In the air cleaning method of the present invention, it is necessary to irradiate the photocatalyst member with excitation light. As means for irradiating excitation light, irradiation using a dedicated light source, irradiation of sunlight outdoors or near a window, and indoors Use of light used for other purposes, such as illumination light, can be mentioned. Irradiation with the excitation light can be either continuous or intermittent.
【００２０】本発明の空気清浄化方法においては、空気
を通風させながら清浄化処理することが一般的であり、
通風手段として、シロッコ型、ターボ型、ラジアル型、
軸流型、プロペラ型、クロスフロー型などのファンモー
ターや熱対流によるものなどを利用しても良い。In the air cleaning method of the present invention, it is general to carry out a cleaning process while passing air through.
Sirocco type, turbo type, radial type,
A fan motor of an axial flow type, a propeller type, a cross flow type, or the like, or a device using thermal convection may be used.
【００２１】本発明の空気清浄化方法においては、光触
媒方式以外の空気清浄化手段、例えば、除塵フィルター
や集塵電極ユニットなどによる除塵、活性炭等の吸着剤
や二酸化マンガン等の酸化触媒などを用いた脱臭、抗
菌、防黴、抗ウイルスなどの手段を併用しても良い。In the air cleaning method of the present invention, air cleaning means other than the photocatalytic system, such as dust removal using a dust filter or a dust collection electrode unit, an adsorbent such as activated carbon, and an oxidation catalyst such as manganese dioxide, are used. Means such as deodorization, antibacterial, antifungal, and antiviral may be used in combination.
【００２２】除塵、脱臭、抗菌などの併用する空気清浄
化手段は、除湿前、除湿後の光触媒処理前、または、光
触媒処理後に適宜設けることができ、複数の手段を集中
して設置しても良く、各々分散して設置しても良いが、
一般的には、除塵や脱臭などの処理は光触媒処理の前段
に設けることが好ましく、除湿後の光触媒処理前に設け
ることが特に好ましい。The air purifying means used in combination with dust removal, deodorization, antibacterial and the like can be appropriately provided before dehumidification, before photocatalytic treatment after dehumidification, or after photocatalytic treatment. Good, they may be installed separately,
Generally, treatments such as dust removal and deodorization are preferably provided before the photocatalytic treatment, and particularly preferably provided before the photocatalytic treatment after the dehumidification.
【００２３】本発明の空気清浄化方法において、処理前
後の空気の湿度変化を望まない場合には、光触媒処理後
に適宜加湿し、除去された空気中水分を補うことができ
る。In the air cleaning method of the present invention, if it is not desired to change the humidity of the air before and after the treatment, the air can be humidified appropriately after the photocatalytic treatment to make up for the removed moisture in the air.
【００２４】[0024]
【実施例】以下、本発明を実施例により説明するが、本
発明はこれらの実施例に限定されるものではない。EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.
【００２５】実施例１ ３０ｃｍ角の筒状筐体の中に、ペレット状シリカゲルを
充填した除湿フィルターユニット、光触媒コルゲート
（商品名ラジット光触媒コルゲート、三菱製紙製）、ピ
ーク波長３６０ｎｍの近紫外光を発する光源、光触媒コ
ルゲート（商品名ラジット光触媒コルゲート、三菱製紙
製）、およびファンを順次配置した試験用空気清浄機
を作製し、除湿フィルターが吸気側、ファンが排気側と
なるように通風し、これを実施例１の空気清浄化方法と
した。Example 1 A dehumidifying filter unit filled with pelletized silica gel in a cylindrical casing of 30 cm square, a photocatalytic corrugate (trade name: RADIT photocatalytic corrugate, manufactured by Mitsubishi Paper), and a near-ultraviolet light having a peak wavelength of 360 nm is emitted. A test air purifier was prepared in which a light source, a photocatalytic corrugate (trade name: Ragit photocatalytic corrugate, manufactured by Mitsubishi Paper Mills), and a fan were sequentially arranged. The air cleaning method of Example 1 was used.
【００２６】比較例１ 実施例１において、試験用空気清浄機から除湿フィル
ターユニットを外した試験用空気清浄機とする以外は
全て実施例１と同一とし、これを比較例１の空気清浄化
方法とした。Comparative Example 1 The same procedure as in Example 1 was carried out except that the test air purifier was replaced with a test air purifier in which the dehumidifying filter unit was removed. And
【００２７】比較例２ 実施例１において、試験用空気清浄機から２枚の光触
媒コルゲートと光源を外した試験用空気清浄機とする
以外は全て実施例１と同一とし、これを比較例２の空気
清浄化方法とした。Comparative Example 2 The same procedure as in Comparative Example 2 was carried out except that the test air purifier was replaced with two photocatalytic corrugates and a light source. An air cleaning method was used.
【００２８】実施例２ 市販の除湿機（松下電器製ＣＢ−Ｂ１６０Ｆ−Ｗ）の排
気口を比較例１の試験用空気清浄機の吸気側にダクト
で接続し、除湿機を運転しながら試験用空気清浄機の
ファンが排気側となるように通風し、これを実施例２の
空気清浄化方法とした。Example 2 The exhaust port of a commercially available dehumidifier (CB-B160F-W manufactured by Matsushita Electric Industrial Co., Ltd.) was connected to the intake side of the test air cleaner of Comparative Example 1 by a duct, and the test was performed while the dehumidifier was operating. Ventilation was performed so that the fan of the air purifier was on the exhaust side, and this was used as the air cleaning method of Example 2.
【００２９】比較例３ 実施例２において、試験用空気清浄機とダクトを外し
て除湿機のみとし、これを比較例３の空気清浄化方法と
した。Comparative Example 3 In Example 2, the test air purifier and the duct were removed, and only the dehumidifier was used. This was used as the air purifying method of Comparative Example 3.
【００３０】比較例４ 実施例２において、試験用空気清浄機から光源を外し
た試験用空気清浄機とする以外は全て実施例２と同一
とし、これを比較例４の空気清浄化方法とした。Comparative Example 4 The procedure of Example 2 was repeated except that the light source was removed from the test air purifier, except that the test air purifier was used. .
【００３１】以上、実施例および比較例の光触媒部材
は、以下の方法で脱臭試験を行い、その結果を表１と表
２に示した。The photocatalyst members of Examples and Comparative Examples were subjected to a deodorizing test by the following method, and the results are shown in Tables 1 and 2.
【００３２】［脱臭性］３水準の湿度条件において、１
立米の密閉容器内にアセトアルデヒドを２０ｐｐｍ注入
した後に実施例および比較例の空気清浄化方法を実施
し、容器中のアセトアルデヒド濃度（ｐｐｍ）をガスク
ロマトグラフで測定し、その除去速度を求めた。なお、
空気清浄化方法の実施例においては、適宜試験用空気清
浄機の光源を点灯し、ファンを運転し、また、除湿機を
運転した。[Deodorizing property] Under three humidity conditions, 1
After injecting 20 ppm of acetaldehyde into a closed rice container, the air cleaning methods of Examples and Comparative Examples were performed, the acetaldehyde concentration (ppm) in the container was measured by gas chromatography, and the removal rate was determined. In addition,
In the example of the air cleaning method, the light source of the test air purifier was appropriately turned on, the fan was operated, and the dehumidifier was operated.
【００３３】［光触媒効率の向上率］各湿度条件におけ
る実施例１および２の脱臭性（アセトアルデヒド除去速
度）を比較例１の脱臭性（アセトアルデヒド除去速度）
で除した値を百分率（％）で表し、光触媒効率の向上率
とした。[Improvement rate of photocatalytic efficiency] The deodorizing property (acetaldehyde removing rate) of Examples 1 and 2 under each humidity condition was compared with that of Comparative Example 1 (acetaldehyde removing rate).
The value divided by is expressed as a percentage (%), which was defined as the improvement rate of the photocatalytic efficiency.
【００３４】［湿度］各実施例において、除湿処理前の
湿度、および上記の脱臭性測定における１立米の密閉容
器内と同じ空気を処理した除湿処理後の湿度を測定し
た。[Humidity] In each of the examples, the humidity before the dehumidifying treatment and the humidity after the dehumidifying treatment in which the same air as in the closed container of 1 m3 in the above-mentioned deodorizing property measurement was treated were measured.
【００３５】[0035]
【表１】 [Table 1]
【００３６】[0036]
【表２】 [Table 2]
【００３７】表１および表２の結果から、汚染空気を除
湿した後に光触媒によって処理する空気清浄化方法は、
アセトアルデヒドの除去速度が大きく、脱臭性が優れる
ことが分かる。処理する空気の相対湿度が６０％未満の
場合には、脱臭性は比較的高く、除湿処理を実施するメ
リットは少ない。一方、除湿処理後の相対湿度が４５％
を越える場合には、除湿による脱臭性の向上は認められ
るが、脱臭が低目であって実用性が乏しい。また、除湿
処理前の絶対湿度Ａ（ｇ／ｍ3）と光触媒による空気清
浄化前の絶対湿度Ｂ（ｇ／ｍ3）の関係が、Ａ／Ｂ≧
１．５の場合には、光触媒効率の向上率が１５０％以上
となり、光触媒の効率化を充分に達成できる。From the results of Tables 1 and 2, the air cleaning method of dehumidifying contaminated air and then treating with a photocatalyst is as follows.
It can be seen that the acetaldehyde removal rate is high and the deodorization is excellent. When the relative humidity of the air to be treated is less than 60%, the deodorizing property is relatively high, and the merit of performing the dehumidifying treatment is small. On the other hand, the relative humidity after the dehumidification process is 45%
In the case of exceeding, the improvement of deodorization by dehumidification is recognized, but the deodorization is low and the practicality is poor. The relationship between the absolute humidity A (g / m 3 ) before the dehumidifying treatment and the absolute humidity B (g / m 3 ) before the air cleaning by the photocatalyst is A / B ≧
In the case of 1.5, the improvement rate of the photocatalytic efficiency becomes 150% or more, and the efficiency of the photocatalyst can be sufficiently improved.
【００３８】比較例２および比較例３において除湿処理
のみを行った場合にはアセトアルデヒドの除去速度は著
しく小さく、除湿処理そのものが脱臭性に寄与している
のではないことは明白である。また、比較例４において
光を照射せず光触媒を機能させない場合の脱臭性は低
く、実施例で用いた光触媒部材の吸着脱臭作用が湿度の
影響を受けているのではないことも明白である。In Comparative Examples 2 and 3, when only the dehumidifying treatment was performed, the removal rate of acetaldehyde was extremely low, and it is clear that the dehumidifying treatment itself did not contribute to the deodorizing property. Further, in Comparative Example 4, the deodorizing property when the photocatalyst was not activated without irradiation with light was low, and it is clear that the adsorption and deodorizing action of the photocatalyst member used in the examples was not affected by humidity.
【００３９】[0039]
【発明の効果】本発明によれば、空気清浄化処理を受け
る前の汚染空気中の水分を低下させた後、好ましくは特
定の水分低下を実施した後に光触媒によって清浄化処理
することを特徴とする空気清浄化方法は、光触媒による
空気中有害物質の分解除去を著しく高効率に行うことが
可能であり、優れた脱臭効果を得ることが可能である。According to the present invention, after the moisture in the contaminated air is reduced before being subjected to the air cleaning treatment, preferably after a specific moisture reduction is carried out, the cleaning treatment is carried out with a photocatalyst. The air purifying method described above can perform decomposition and removal of harmful substances in the air with a photocatalyst with extremely high efficiency, and can obtain an excellent deodorizing effect.
フロントページの続き Ｆターム(参考） 4C080 AA07 BB02 BB05 CC02 CC12 CC13 CC14 CC15 HH05 JJ05 JJ06 JJ09 KK08 LL20 MM02 NN06 QQ01 4D048 AA19 AA22 AB03 BA07X BA13X BA41X BB08 CD01 CD05 DA03 DA20 EA01 4G069 AA01 AA03 AA11 BA04B BA48A CA10 CA11 CA17 DA05 EA13 Continued on the front page F-term (reference) 4C080 AA07 BB02 BB05 CC02 CC12 CC13 CC14 CC15 HH05 JJ05 JJ06 JJ09 KK08 LL20 MM02 NN06 QQ01 4D048 AA19 AA22 AB03 BA07X BA13X BA41X BB08 CD01 CD05 DA03 DA20 EA01 A04 A03 A04 EA13
Claims (3)
って分解、除去する空気清浄化方法において、空気清浄
化処理を受ける前の汚染空気中の水分を低下させた後に
光触媒によって清浄化処理することを特徴とする空気清
浄化方法。1. An air cleaning method for decomposing and removing harmful substances contained in air with a photocatalyst, wherein the water in the contaminated air is reduced before being subjected to the air cleaning process and then the photocatalyst is cleaned. An air purification method characterized by the following.
％以上、光触媒による空気清浄化前の相対湿度が４５％
以下であることを特徴とする請求項１に記載の空気清浄
化方法。2. The relative humidity of the contaminated air before the dehumidification treatment is 60.
%, Relative humidity before air cleaning by photocatalyst is 45%
2. The air cleaning method according to claim 1, wherein:
／ｍ3）と光触媒による空気清浄化前の絶対湿度Ｂ（ｇ
／ｍ3）の関係が、Ａ／Ｂ≧１．５であることを特徴と
する請求項１または請求項２に記載の空気清浄化方法。3. The absolute humidity A (g) of the contaminated air before the dehumidification treatment.
/ M 3 ) and the absolute humidity B (g) before air cleaning with a photocatalyst
/ M 3 ), wherein A / B ≧ 1.5. 3. The air purification method according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10244513A JP2000070671A (en) | 1998-08-31 | 1998-08-31 | Air purifying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10244513A JP2000070671A (en) | 1998-08-31 | 1998-08-31 | Air purifying method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000070671A true JP2000070671A (en) | 2000-03-07 |
Family
ID=17119805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10244513A Pending JP2000070671A (en) | 1998-08-31 | 1998-08-31 | Air purifying method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000070671A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003033037A1 (en) * | 2001-10-16 | 2003-04-24 | Nichimen Chemical Industry Co., Ltd. | Deodorizing device |
| US7758821B2 (en) | 2001-07-30 | 2010-07-20 | Carrier Corporation | Modular photocatalytic air purifier |
-
1998
- 1998-08-31 JP JP10244513A patent/JP2000070671A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7758821B2 (en) | 2001-07-30 | 2010-07-20 | Carrier Corporation | Modular photocatalytic air purifier |
| US7951327B2 (en) | 2001-07-30 | 2011-05-31 | Carrier Corporation | Photocatalytic air purifier for a fan coil unit |
| WO2003033037A1 (en) * | 2001-10-16 | 2003-04-24 | Nichimen Chemical Industry Co., Ltd. | Deodorizing device |
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