JPH04100512A - Ozone decomposing tower - Google Patents
Ozone decomposing towerInfo
- Publication number
- JPH04100512A JPH04100512A JP2215038A JP21503890A JPH04100512A JP H04100512 A JPH04100512 A JP H04100512A JP 2215038 A JP2215038 A JP 2215038A JP 21503890 A JP21503890 A JP 21503890A JP H04100512 A JPH04100512 A JP H04100512A
- Authority
- JP
- Japan
- Prior art keywords
- ozone
- activated carbon
- tower
- mist
- metal net
- 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
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 58
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003595 mist Substances 0.000 claims abstract description 17
- 238000000354 decomposition reaction Methods 0.000 claims description 25
- 239000000945 filler Substances 0.000 claims description 12
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
- 239000002184 metal Substances 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract 3
- 229910052801 chlorine Inorganic materials 0.000 description 7
- 239000000460 chlorine Substances 0.000 description 7
- -1 chlorine ions Chemical class 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- MBYLVOKEDDQJDY-UHFFFAOYSA-N tris(2-aminoethyl)amine Chemical compound NCCN(CCN)CCN MBYLVOKEDDQJDY-UHFFFAOYSA-N 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は活性炭層にオゾン含有気体を通して気体中のオ
ゾンを除去する、特に水処理に用いられるオゾン分解塔
に関するものである。[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to an ozone decomposition tower that removes ozone from the gas by passing an ozone-containing gas through an activated carbon layer, and is particularly used in water treatment. .
（従来の技術）
オゾンは強力な酸化力を持つ気体であり、排水処理や上
水の浄化に広く利用されているが、オゾンは人体に対し
て有害であり、８時間の労ａ環境条件では０．ｌｐｐｍ
以下とする必要がある。このためオゾン利用設備では、
未反応のオゾン含有気体を分解し、無害化して大気中に
放出している。(Prior art) Ozone is a gas with strong oxidizing power, and is widely used for wastewater treatment and clean water purification. However, ozone is harmful to the human body and is 0. lppm
It is necessary to do the following. For this reason, in equipment that uses ozone,
Unreacted ozone-containing gas is decomposed, rendered harmless, and released into the atmosphere.
オゾンを分解する処理方式としては、燃焼法、触媒法、
活性炭分解法、薬液洗浄法、光分解法などがあり、その
中で保守点検の容易な活性炭分解法が広く利用されてい
る。Treatment methods for decomposing ozone include combustion method, catalyst method,
There are activated carbon decomposition methods, chemical cleaning methods, photodecomposition methods, etc. Among them, the activated carbon decomposition method, which is easy to maintain and inspect, is widely used.
（発明が解決しようとする課題） 活性炭分解法では次のような反応が行われる。(Problem to be solved by the invention) In the activated carbon decomposition method, the following reactions take place.
２０、 ＋２Ｃ→２ＣＯ□＋０□
２０、十Ｃ−＋ＣＯ□＋２０□
ＺＯ，＋ Ｃ→３ＣＯ□十Ｃ
すなわち、活性炭表面における触媒作用で分解する他、
はとんどは活性炭のオゾンによる燃焼反応となっており
、使用によって活性炭は消耗し、通常は活性炭１ｇでオ
ゾン４ｇが分解できる。20, +2C→2CO□+0□ 20, 10C-+CO□+20□ ZO, + C→3CO□10C In other words, in addition to being decomposed by the catalytic action on the activated carbon surface,
Most of the time, it is a combustion reaction of activated carbon with ozone, and the activated carbon is consumed as it is used, and normally 1 g of activated carbon can decompose 4 g of ozone.
活性炭を充填したオゾン分解塔の一般的な構成を第２図
に示す。Figure 2 shows the general configuration of an ozone decomposition tower filled with activated carbon.
第２図において、ステンレス鋼あるいはＦＲＰなどの材
料で作られたオゾン分解塔１の下部から導入管２を通し
て未反応オゾン含有気体が導入され、金網３上に充填さ
れた活性炭層４を通してオゾンが分解され、排気口５を
通って大気へ放出される。In Fig. 2, unreacted ozone-containing gas is introduced from the bottom of an ozone decomposition tower 1 made of materials such as stainless steel or FRP through an introduction pipe 2, and ozone is decomposed through an activated carbon layer 4 filled on a wire mesh 3. and is released into the atmosphere through the exhaust port 5.
このオゾン分解塔を水処理に利用するときは。When using this ozone decomposition tower for water treatment.
未反応オゾン含有気体は相対湿度１００％でミストを多
く含むので、オゾン分解塔の底部にドレン弁６を設け、
溜った水を定期的に排出している。Since the unreacted ozone-containing gas contains a lot of mist at a relative humidity of 100%, a drain valve 6 is provided at the bottom of the ozone decomposition tower.
The accumulated water is drained regularly.
従って、長期間使用するのには問題があり、その１つと
して、活性炭層４の下部での発熱による材料の局部的な
劣化がある。Therefore, there are problems with long-term use, one of which is local deterioration of the material due to heat generation under the activated carbon layer 4.
すなわち、水処理に利用された未反応オゾンは被処理水
を通過してくるので、湿度１００％で被処理水のミスト
を同伴することが多く、ミストの量が多くなると活性炭
層４の下部の金網３との接触面で活性炭を局部的に濡ら
して気体の均一な通過を妨害し、局部的な発熱や未反応
オゾンの排出を速め、濡れた状態で活性炭とオゾンとの
接触による分解熱が作用して、さらに材料の劣化を速め
る。In other words, since unreacted ozone used in water treatment passes through the water to be treated, it often accompanies mist from the water to be treated at 100% humidity, and when the amount of mist increases, the lower part of the activated carbon layer 4 The activated carbon is locally wetted at the contact surface with the wire mesh 3 to prevent the uniform passage of gas, thereby accelerating local heat generation and the discharge of unreacted ozone. This further accelerates the deterioration of the material.
例えば、金網材料として用いられるステンレス鋼に対し
てミストに含まれる塩素イオンが濡れた状態で作用し、
金網の織目で隙間腐食を発生して金網に穴を開けたり、
あるいはステンレス鋼を用いたオゾン分解塔１と金網３
との間で同様に塩素イオンの濃縮１分解熱によって腐食
が行われ、溶接部分に穴を開ける。For example, chlorine ions contained in mist act on stainless steel used as wire mesh material in a wet state.
Crevice corrosion occurs in the weave of the wire mesh, creating holes in the wire mesh,
Or ozone decomposition tower 1 and wire mesh 3 using stainless steel
Similarly, corrosion occurs between the chlorine ions due to the heat of concentration and decomposition, creating a hole in the welded part.
塩素イオンによるステンレス鋼の劣化は対象となる被処
理水の塩素イオン濃度に対応して、上水、下水、し尿の
順に速くなり、使用開始後１〜２年で発生する。Deterioration of stainless steel due to chlorine ions increases in the order of clean water, sewage, and human waste, depending on the chlorine ion concentration of the water to be treated, and occurs within one to two years after the start of use.
本発明は上記の問題を考慮してなされたもので、ミスト
による腐蝕を防止した耐久性の高いオゾン分解塔を提供
することを目的としている。The present invention was made in consideration of the above problems, and an object of the present invention is to provide a highly durable ozone decomposition tower that is prevented from being corroded by mist.
（課題を解決するための手段および作用）本発明は、オ
ゾン含有気体を活性炭層を通して気体中のオゾンを分解
するオゾン分解塔において、塔下部に被処理水からのミ
ストを除くデミスタを設けると共に、活性炭層を支持す
る金網と活性炭との間に耐熱性、耐オゾン性の充填材を
挿入し、デミスタによって被処理水からのミストを除き
、塩素イオンの持ち込みをなくして活性炭の局部的な濡
れを防止すると共に、金網上に充填材をのせることによ
って活性炭とオゾンとの接触を充填材の間に落ち込んだ
少量の活性炭の表面のみで発生させ１分解熱が金網近く
に集中しないようにして局部加熱を防止したものである
。(Means and effects for solving the problems) The present invention provides an ozone decomposition tower that decomposes ozone in the gas by passing an ozone-containing gas through an activated carbon layer, in which a demister is provided at the bottom of the tower to remove mist from the water to be treated. A heat-resistant and ozone-resistant filler is inserted between the wire mesh that supports the activated carbon layer and the activated carbon, and a demister removes mist from the water to be treated, eliminating the introduction of chlorine ions and preventing local wetting of the activated carbon. In addition, by placing the filler on the wire mesh, the contact between the activated carbon and ozone occurs only on the surface of the small amount of activated carbon that has fallen between the fillers, preventing the decomposition heat from concentrating near the wire mesh and causing the ozone to come into contact with the activated carbon and ozone locally. This prevents heating.
（実施例） 本発明の一実施例を第１図に示す。(Example) An embodiment of the present invention is shown in FIG.
第１図において、オゾン分解塔１は塔下部に未反応オゾ
ン含有気体を導入する導入管２、金網３゜活性炭層４、
排気口５．ドレン弁６、デミスタ７、および充填材８か
ら構成されている。In FIG. 1, an ozone decomposition tower 1 includes an inlet pipe 2 for introducing unreacted ozone-containing gas into the lower part of the tower, a wire mesh 3° activated carbon layer 4,
Exhaust port 5. It is composed of a drain valve 6, a demister 7, and a filler 8.
第１図のように構成されたオゾン分解塔では、気体中の
ミストはデミスタの繊維表面に衝突して捕獲され、大き
な水滴として下部へ除去されるので、ミストに含まれる
不純物や塩素イオンなどが金網３やオゾン分解塔１の本
体と活性炭層４との間の接触部へ送入して蓄積されるの
が防止でき、水滴として溜った水はトレン弁６によって
定期的に塔外の排出される。In the ozone decomposition tower configured as shown in Figure 1, the mist in the gas collides with the fiber surface of the demister, is captured, and is removed to the bottom as large water droplets, so that impurities, chlorine ions, etc. contained in the mist are removed. It is possible to prevent the water from being introduced into the wire mesh 3 or the contact area between the main body of the ozone decomposition tower 1 and the activated carbon layer 4 and to accumulate therein, and the water that has accumulated as water droplets is periodically discharged outside the tower by the tren valve 6. Ru.
デミスタとしてはプラスチック製のフィルタのほか、耐
オゾン性の金属フィルタなども利用でき、塔と分離でき
るようにすることも可能であり、またサイクロンなどを
併用することも可能である。In addition to plastic filters, ozone-resistant metal filters can be used as the demister, and it is also possible to separate it from the tower, and it is also possible to use a cyclone or the like in combination.
また相対湿度１００％の気体のため、気体の冷却によっ
て水蒸気から生じるミストには塩素イオンがないため、
活性炭の濡れ以外問題にはならない。Also, since it is a gas with a relative humidity of 100%, there are no chlorine ions in the mist generated from water vapor by cooling the gas.
There is no problem other than wetting the activated carbon.
ミストを除かれた未反応オゾン含有気体は、金網を通過
し、充填材、例えば砕石、砂利などの間を通過して活性
炭層４へ送られ、活性炭とオゾンとの反応によって未反
応オゾンが分解除去され、排気口５から大気へ放出され
る。The unreacted ozone-containing gas from which the mist has been removed passes through a wire mesh, passes between fillers such as crushed stones and gravel, and is sent to the activated carbon layer 4, where the unreacted ozone is decomposed by the reaction between the activated carbon and ozone. It is removed and released into the atmosphere from the exhaust port 5.
金網上の充填材は８はオゾンと活性炭との反応による熱
を金網あるいは金網と分解塔の接触している部分に集中
しないようにしている。The filling material 8 on the wire mesh prevents the heat generated by the reaction between ozone and activated carbon from concentrating on the wire mesh or on the part where the wire mesh and the decomposition tower are in contact.
活性炭とオゾンとの接触による分解は、充填材間に落ち
込む活性炭との接触によって行われ、充填材の上部の活
性炭層で発生する。気体の通過速度は充填材の間で速く
なり、オゾンの分解熱は金網全体には伝わらない。The decomposition of activated carbon by contact with ozone takes place through contact with the activated carbon that falls between the fillers and occurs in the activated carbon layer above the fillers. The gas passage speed becomes faster between the fillers, and the heat of decomposition of ozone is not transferred to the entire wire mesh.
上述のように本発明によれば、オゾン分解塔にミストと
して送入される塩素イオンを水滴として活性炭層の前段
で除き、またステンレス鋼、あるいはＦＲＰなとで構成
される塔の一部、すなわち金銅上部でのオゾンと活性炭
との反応による発熱を充填材を用いて分散させることに
よって材料の劣化を防止することができ、またオゾン処
理プラント運転上、高濃度のオゾン含有気体を通過させ
たいときにも、短時間ならば充填材による熱の分散によ
って可能となる。As described above, according to the present invention, chlorine ions sent to the ozone decomposition tower as a mist are removed as water droplets before the activated carbon layer, and a part of the tower made of stainless steel or FRP, i.e. Deterioration of the material can be prevented by dispersing the heat generated by the reaction between ozone and activated carbon in the upper part of the gilt copper using a filler, and when it is necessary to pass a high concentration of ozone-containing gas during ozone treatment plant operation. Even for short periods of time, this is possible due to the heat dissipation by the filler.
活性炭層はオゾンによって消耗し１層の高さは次第に減
少して行くが、上部から新しい活性炭を追加すればよく
、活性炭の濡れを防止できるので保守点検上からも好都
合である。Although the activated carbon layer is consumed by ozone and the height of one layer gradually decreases, it is sufficient to add new activated carbon from the top, which is convenient from the viewpoint of maintenance and inspection because it prevents the activated carbon from getting wet.
以上説明したように本発明によれば、安価な材料である
デミスタや充填材の利用によって、安定して長期間使用
できる経済的なオゾン分解塔が得られる。As explained above, according to the present invention, an economical ozone decomposition column that can be stably used for a long period of time can be obtained by using inexpensive materials such as a demister and a filler.
第１図は本発明の一実施例を示すオゾン分解塔の構成図
、第２図は従来のオゾン分解塔の一例を示す構成図であ
る。FIG. 1 is a block diagram of an ozone decomposition tower showing an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a conventional ozone decomposition tower.
Claims (1)
して気体中のオゾンを分解するオゾン分解塔において、
塔下部に被処理水からのミストを除くデミスタを設ける
と共に、活性炭層を支持する金網と活性炭層との間に耐
熱性、耐オゾン性の充填材を挿入したことを特徴とする
オゾン分解塔。In an ozone decomposition tower that decomposes ozone in the gas by passing an ozone-containing gas obtained by oxidizing the water to be treated through an activated carbon layer,
An ozone decomposition tower characterized in that a demister is provided at the lower part of the tower to remove mist from water to be treated, and a heat-resistant and ozone-resistant filler is inserted between a wire mesh that supports the activated carbon layer and the activated carbon layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2215038A JPH04100512A (en) | 1990-08-16 | 1990-08-16 | Ozone decomposing tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2215038A JPH04100512A (en) | 1990-08-16 | 1990-08-16 | Ozone decomposing tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04100512A true JPH04100512A (en) | 1992-04-02 |
Family
ID=16665729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2215038A Pending JPH04100512A (en) | 1990-08-16 | 1990-08-16 | Ozone decomposing tower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04100512A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108744777A (en) * | 2018-06-15 | 2018-11-06 | 苏州市玄天环保科技有限公司 | A kind of boiler waste gas treating device |
-
1990
- 1990-08-16 JP JP2215038A patent/JPH04100512A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108744777A (en) * | 2018-06-15 | 2018-11-06 | 苏州市玄天环保科技有限公司 | A kind of boiler waste gas treating device |
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