JPS6348574B2 - - Google Patents
Info
- Publication number
- JPS6348574B2 JPS6348574B2 JP61003601A JP360186A JPS6348574B2 JP S6348574 B2 JPS6348574 B2 JP S6348574B2 JP 61003601 A JP61003601 A JP 61003601A JP 360186 A JP360186 A JP 360186A JP S6348574 B2 JPS6348574 B2 JP S6348574B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- adsorption
- regenerated
- regeneration
- volatile organic
- 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.)
- Expired
Links
- 238000001179 sorption measurement Methods 0.000 claims description 31
- 150000004045 organic chlorine compounds Chemical class 0.000 claims description 15
- 230000008929 regeneration Effects 0.000 claims description 15
- 238000011069 regeneration method Methods 0.000 claims description 15
- 239000003463 adsorbent Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 4
- 230000002070 germicidal effect Effects 0.000 claims description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 2
- 150000002894 organic compounds Chemical class 0.000 claims 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 6
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 4
- 229950011008 tetrachloroethylene Drugs 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000000711 cancerogenic effect Effects 0.000 description 2
- 231100000315 carcinogenic Toxicity 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 150000002896 organic halogen compounds Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000012492 regenerant Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Physical Water Treatments (AREA)
- Removal Of Specific Substances (AREA)
Description
〔産業上の利用分野〕
本発明は、トリクロロエチレン、テトラクロロ
エチレン等の発ガン性のある揮発性有機塩素化合
物を含む上水、用水、廃水等の処理で行われるス
トリツピング過程で排気される排ガスの処理方法
に関するものである。
〔従来技術〕
近年、トリクロロエチレン、テトラクロロエチ
レン等の発ガン性のある揮発性有機塩素化合物に
よる環境汚染が問題となつており、汚粋源として
は主としてドライクリーニング用脱脂剤や、金属
工業、電子産業等の洗浄廃水に起因するといわれ
ている。
水中に含まれるこれら揮発性有機塩素化合物
は、ストリツピングを行うことによつて水中から
容易に除去することができるが、ストリツピング
で排気される排ガス中に揮発性有機塩素化合物が
移行し、この排ガスを未処理のまま大気中に放散
すると、再び新たな環境汚染の原因となるところ
から、吸着剤によつて排ガスを吸着処理し、無害
化することが一般的に考えられる。
〔発明が解決しようとする問題点〕
しかしながら、前記排ガスの吸着処理は、比較
的確実な方法であるが、対象成分濃度が一般に数
十mg／Ｎm3以下と極めて低濃度であるために、吸
着容量が数％（WT）以下と小さく、また再生時
に排出される使用済再生剤中の脱着された成分の
処理も必要となり、処理操作は煩雑であり、全体
のランニングコストも高くなる点が問題であつ
た。
本発明は、鋭意研究した結果完成されたもので
あつて、揮発性有機塩素化合物を含む水のストリ
ツピングで排気される排ガスを吸着剤によつて低
コストでしかも簡便に無害化処理し、さらに吸着
剤の再生時に脱着されて排出される有害成分をも
合理的に除去し、もつて環境汚染の防止をはかる
ことができる方法を提供することを目的とするも
のである。
〔問題点を解決するための手段〕
本発明は、揮発性有機塩素化合物を含む水をス
トリツピングして排気される排ガスを、吸着塔に
導いて排ガス中に移行された前記揮発性有機塩素
化合物を吸着処理し、該吸着塔の吸着剤の再生を
再生用ガスで行つて吸着成分を脱着し、該再生で
排出される再生排ガスに殺菌線とオゾン発生線の
両紫外線を照射して再生排ガス中に脱着された前
記揮発性有機化合物を分解したのち、さらにその
ガスを前記吸着塔に導いて吸着処理することを特
徴とする排ガス処理方法を提供するものである。
〔作用〕
本発明の作用について、一実施態様を示す図面
を参照しながら説明すれば、トリクロロエチレ
ン、テトラクロロエチレン等の揮発性有機塩素化
合物を含有する原水１は、ポンプ２によつて充填
塔３内の上方に導かれて内部の充填物上に散布さ
れ、下方から送風機４によつて吹き込まれるスト
リツピング空気５等によつて水中の揮発性有機塩
素化合物が除去され、処理水６となつて流出す
る。このとき、充填塔３から排気される排ガス７
中には、水中から追い出された揮発性有機塩素化
合物が含まれており、この排ガス７を吸着剤（粒
状、繊維状、ハニカム状等の活性炭、ゼオライ
ト、モレキユラーシーブ等の天然又は合成の吸着
剤を使用することかできる）を充填した吸着塔８
に導いて吸着処理することにより、排ガス７中の
揮発性有機塩素化合物は吸着され、無害化された
処理ガス９となつて大気中に放散される。
このような吸着操作において、吸着塔８の吸着
剤は吸着の進行に伴つて吸着能力を失い、飽和に
達したときは吸着成分を脱着する再生を行う。す
なわち、例えばストリツピング空気５を分岐して
加熱器１０によつて加熱した空気を再生用ガス１
１として、飽和した吸着塔８に供給し、吸着剤に
吸着されている成分を脱着する。このときに排出
される再生排ガス１２には吸着剤の再生時に脱着
された揮発性有機塩素化合物などの有害成分が含
有されるから、この再生排ガス１２を紫外線照射
装置１３に導入して紫外線を照射する。
紫外線照射装置１３においては、253.7nmと
184.9nmを主波長にもつ紫外線を照射して再生排
ガス１２中の有害成分を分解する。この場合、
253.7nmを主波長にもついわゆる殺菌線と称され
ている紫外線だけでは効果が少ないので、
184.9nmを主波長にもついわゆるオゾン発生線と
称されている紫外線をも照射することによつて有
害成分の分解効果が発揮される。効果的な分解が
できる有機物としては、有機ハロゲン化合物があ
り、特にトリクロロエチレン、テトラクロロエチ
レンに対しては極めて効果的である。これらの紫
外線の照射は、同時に照射してもよく、また別別
に照射することもできる。
このように紫外線照射後の再生排ガス１２′に
は一部未分解成分が残留し、そのまま大気中へ放
散することができない。そのため、紫外線照射後
の再生排ガス１２′を再び再生済の吸着塔８に導
いて、残留する未分解成分を吸着させ、完全無害
化してから大気中へ放散する。
なお、上記操作において、使用する吸着塔が１
塔である場合には、吸着塔８の再生時にはストリ
ツピング排ガス７の吸着操作を中断させなくては
ならないが、図示例のように吸着塔８と別に吸着
塔８′（１塔に限らず複数塔でもよい）を並設さ
せることにより、吸着と再生を交互に行い、連続
的に処理を継続することができるから便利であ
る。
また、上記実施例では、吸着塔内の吸着剤の再
生は、再生用ガスを別個に設けられた加熱器１０
で加熱したのち吸着塔に供給する例を示したが、
吸着塔に加熱機能を内蔵した方式とすることもで
きる。
〔実施例〕
某工場洗浄廃水を空気を使用してストリツピン
グし、その排ガス７を、図示例のように、２塔並
設した吸着塔の一方の吸着塔８にて処理し、この
吸着塔８が飽和したときに加熱空気で再生し、排
出される再生排ガス１２を紫外線照射後、再生済
の他方の吸着塔８′にて処理した。このときの処
理条件及び処理結果は次の通りであつた。
処理条件
１ ストリツピング気液比：20
２ 吸着剤：活性炭素繊維
３ 吸着剤通気SV：30001／ｈ
４ 再生空気／ストリツピング空気：１／3000
５ 紫外線照射
紫外線照射出力 14W
照射時間 1.6〜4.7sec
波長（同時照射） 253.7nm（65％）
184.9nm（15％）
その他（20％）
処理結果
[Industrial Application Field] The present invention relates to a method for treating exhaust gas exhausted during the stripping process performed in the treatment of clean water, commercial water, wastewater, etc., which contains carcinogenic volatile organic chlorine compounds such as trichlorethylene and tetrachlorethylene. It is related to. [Prior Art] In recent years, environmental pollution due to carcinogenic volatile organic chlorine compounds such as trichlorethylene and tetrachlorethylene has become a problem, and the sources of pollution are mainly dry cleaning degreasers, metal industry, electronic industry, etc. This is said to be caused by washing wastewater. These volatile organic chlorine compounds contained in water can be easily removed from the water by stripping, but the volatile organic chlorine compounds migrate into the exhaust gas exhausted by stripping, and this exhaust gas If it is released into the atmosphere without being treated, it may cause new environmental pollution, so it is generally considered that the exhaust gas is adsorbed using an adsorbent to render it harmless. [Problems to be solved by the invention] However, although the above adsorption treatment of exhaust gas is a relatively reliable method, the concentration of target components is generally extremely low, several tens of mg/Nm 3 or less, so adsorption is difficult. The problem is that the capacity is small, less than a few percent (WT), and it is also necessary to treat the desorbed components of the used regenerant discharged during regeneration, making the treatment operation complicated and increasing the overall running cost. It was hot. The present invention was completed as a result of intensive research, and uses an adsorbent to detoxify exhaust gas exhausted from stripping of water containing volatile organic chlorine compounds at low cost and in a simple manner. It is an object of the present invention to provide a method that can rationally remove harmful components that are desorbed and discharged during regeneration of agents, thereby preventing environmental pollution. [Means for Solving the Problems] The present invention provides a method for stripping water containing volatile organic chlorine compounds and guiding the exhaust gas to an adsorption tower to remove the volatile organic chlorine compounds transferred into the exhaust gas. After the adsorption treatment, the adsorbent in the adsorption tower is regenerated with a regeneration gas to desorb the adsorbed components, and the regenerated exhaust gas discharged during the regeneration is irradiated with both ultraviolet rays of germicidal radiation and ozone generation radiation to remove the absorbed components from the regenerated exhaust gas. The present invention provides an exhaust gas treatment method, characterized in that after decomposing the volatile organic compound desorbed by the gas, the gas is further guided to the adsorption tower and subjected to adsorption treatment. [Operation] The operation of the present invention will be explained with reference to the drawings showing one embodiment. Raw water 1 containing volatile organic chlorine compounds such as trichlorethylene and tetrachlorethylene is pumped into the packed column 3 by the pump 2. Volatile organic chlorine compounds in the water are removed by stripping air 5 and the like which are guided upward and spread over the internal packing, and which are blown from below by a blower 4, and flow out as treated water 6. At this time, the exhaust gas 7 exhausted from the packed tower 3
It contains volatile organic chlorine compounds expelled from the water, and this exhaust gas 7 is absorbed by adsorbents (natural or synthetic such as granular, fibrous, honeycomb-like activated carbon, zeolite, molecular sieve, etc.). Adsorption tower 8 filled with adsorbent
By conducting adsorption treatment on the exhaust gas 7, volatile organic chlorine compounds in the exhaust gas 7 are adsorbed and released into the atmosphere as a detoxified treated gas 9. In such an adsorption operation, the adsorbent in the adsorption tower 8 loses its adsorption capacity as adsorption progresses, and when it reaches saturation, regeneration is performed to desorb the adsorbed components. That is, for example, the stripping air 5 is branched and the air heated by the heater 10 is used as the regeneration gas 1.
1, the adsorbent is supplied to the saturated adsorption tower 8 and the components adsorbed on the adsorbent are desorbed. Since the regenerated exhaust gas 12 discharged at this time contains harmful components such as volatile organic chlorine compounds desorbed during the regeneration of the adsorbent, this regenerated exhaust gas 12 is introduced into the ultraviolet irradiation device 13 and irradiated with ultraviolet rays. do. In the ultraviolet irradiation device 13, the wavelength is 253.7nm.
Harmful components in the regenerated exhaust gas 12 are decomposed by irradiating ultraviolet rays with a main wavelength of 184.9 nm. in this case,
Ultraviolet rays, which have a main wavelength of 253.7nm and are called germicidal rays, are not very effective.
The effect of decomposing harmful components can be exerted by irradiating ultraviolet rays, which have a main wavelength of 184.9 nm and are so-called ozone-generating rays. Organic substances that can be effectively decomposed include organic halogen compounds, and are particularly effective against trichlorethylene and tetrachloroethylene. These ultraviolet rays may be irradiated simultaneously or separately. In this way, some undecomposed components remain in the regenerated exhaust gas 12' after being irradiated with ultraviolet rays, and cannot be released into the atmosphere as is. Therefore, the regenerated exhaust gas 12' after being irradiated with ultraviolet rays is again guided to the regenerated adsorption tower 8, where the remaining undecomposed components are adsorbed, completely rendered harmless, and then released into the atmosphere. In addition, in the above operation, the number of adsorption towers used is 1.
In the case of a column, it is necessary to interrupt the adsorption operation of the stripping exhaust gas 7 when the adsorption column 8 is regenerated. It is convenient because adsorption and regeneration can be performed alternately and processing can be continued continuously by arranging them in parallel. In addition, in the above embodiment, the regeneration of the adsorbent in the adsorption tower is carried out using a heater 10 separately provided with the regeneration gas.
An example was shown in which the material was heated with water and then supplied to the adsorption tower.
It is also possible to adopt a system in which the adsorption tower has a built-in heating function. [Example] A certain factory cleaning wastewater is stripped using air, and the exhaust gas 7 is treated in one adsorption tower 8 of two adsorption towers installed in parallel as shown in the example. When it becomes saturated, it is regenerated with heated air, and the discharged regenerated exhaust gas 12 is irradiated with ultraviolet rays and then treated in the other regenerated adsorption tower 8'. The processing conditions and processing results at this time were as follows. Processing conditions 1 Stripping gas-liquid ratio: 20 2 Adsorbent: activated carbon fiber 3 Adsorbent ventilation SV: 30001/h 4 Regeneration air/stripping air: 1/3000 5 Ultraviolet irradiation Ultraviolet irradiation output 14W Irradiation time 1.6-4.7sec Wavelength ( Simultaneous irradiation) 253.7nm (65%) 184.9nm (15%) Others (20%) Processing results
以上述べたように本発明によれば、排出される
ストリツピング排ガス及びこれを処理する吸着剤
の再生排ガス中の揮発性有機塩素化合物をすべて
効果的に除去して無害化し、環境汚染を完全に防
止することができるものである。
As described above, according to the present invention, all volatile organic chlorine compounds in the stripping exhaust gas discharged and the recycled exhaust gas of the adsorbent that processes it are effectively removed and rendered harmless, thereby completely preventing environmental pollution. It is something that can be done.
第１図は本発明の一実施態様を示す系統説明図
で、第２図は再生排ガス中のトリクロロエチレン
濃度と紫外線による分解率の関係を示す線図、第
３図は再生排ガス中のテトラクロロエチレン濃度
と紫外線による分解率の関係を示す線図である。
１…原水、２…ポンプ、３…充填塔、４…送風
機、５…ストリツピング空気、６…処理水、７…
排ガス、８，８′…吸着塔、９…処理ガス、１０
…加熱器、１１…再生用ガス、１２，１２′…再
生排ガス、１３…紫外線照射装置。
Fig. 1 is a system explanatory diagram showing one embodiment of the present invention, Fig. 2 is a diagram showing the relationship between the trichlorethylene concentration in the recycled exhaust gas and the decomposition rate by ultraviolet rays, and Fig. 3 is a diagram showing the relationship between the trichlorethylene concentration in the recycled exhaust gas and the decomposition rate by ultraviolet rays. FIG. 2 is a diagram showing the relationship between decomposition rates due to ultraviolet rays. 1... Raw water, 2... Pump, 3... Packed tower, 4... Blower, 5... Stripping air, 6... Treated water, 7...
Exhaust gas, 8, 8'... Adsorption tower, 9... Processing gas, 10
...heater, 11...regeneration gas, 12, 12'...regeneration exhaust gas, 13...ultraviolet irradiation device.
Claims (1)
ングして排気される排ガスを、吸着塔に導いて排
ガス中に移行された前記揮発性有機塩素化合物を
吸着処理し、該吸着塔の吸着剤の再生を再生用ガ
スで行つて吸着成分を脱着し、該再生で排出され
る再生排ガスに殺菌線とオゾン発生線の両紫外線
を照射して再生排ガス中に脱着された前記揮発性
有機化合物を分解したのち、さらにそのガスを前
記吸着塔に導いて吸着処理することを特徴とする
排ガス処理方法。 ２ 前記吸着塔を複数塔並設し、これらの吸着塔
を交互に使用して処理を連続化したものである特
許請求の範囲第１項記載の排ガス処理方法。[Scope of Claims] 1. Exhaust gas exhausted by stripping water containing volatile organic chlorine compounds is led to an adsorption tower, and the volatile organic chlorine compounds transferred into the exhaust gas are adsorbed, The adsorbent is regenerated with a regeneration gas to desorb the adsorbed components, and the regenerated exhaust gas discharged during the regeneration is irradiated with both ultraviolet rays of germicidal radiation and ozone generation radiation to remove the volatile components desorbed in the regenerated exhaust gas. An exhaust gas treatment method characterized in that after decomposing an organic compound, the gas is further guided to the adsorption tower for adsorption treatment. 2. The exhaust gas treatment method according to claim 1, wherein a plurality of adsorption towers are arranged in parallel and the treatment is made continuous by using these adsorption towers alternately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61003601A JPS62163730A (en) | 1986-01-13 | 1986-01-13 | Treatment of exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61003601A JPS62163730A (en) | 1986-01-13 | 1986-01-13 | Treatment of exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62163730A JPS62163730A (en) | 1987-07-20 |
| JPS6348574B2 true JPS6348574B2 (en) | 1988-09-29 |
Family
ID=11562005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61003601A Granted JPS62163730A (en) | 1986-01-13 | 1986-01-13 | Treatment of exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62163730A (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4941957A (en) * | 1986-10-22 | 1990-07-17 | Ultrox International | Decomposition of volatile ogranic halogenated compounds contained in gases and aqueous solutions |
| JP2813354B2 (en) * | 1988-10-24 | 1998-10-22 | ジンプロ・エンヴィロメンタル・インコーポレーテッド | Decomposition of volatile organic halogenated compounds contained in gas and aqueous solution |
| JPH0470126U (en) * | 1990-10-24 | 1992-06-22 | ||
| KR20000065318A (en) * | 1999-04-01 | 2000-11-15 | 박종규 | Process for preventing air pollution by using ultraviolet ray |
| US6358374B1 (en) * | 1999-12-17 | 2002-03-19 | Carrier Corporation | Integrated photocatalytic and adsorbent technologies for the removal of gaseous contaminants |
| KR100424507B1 (en) * | 2000-05-27 | 2004-03-26 | (주)백년기술 | Apparatus for destruction of volatile organic compounds |
| KR20020033355A (en) * | 2000-10-31 | 2002-05-06 | 김동현 | Activated carbon absorbing apparatus |
| KR100470747B1 (en) * | 2000-11-06 | 2005-02-21 | (주)서울필텍엔지니어링 | Method and apparatus for eliminating the stench and volatile organic compounds in the polluted air |
| KR20020057852A (en) * | 2002-04-20 | 2002-07-12 | 한국문화기술연구원(주) | A Method for Recovery and Removal of Volatile Organic Compounds, and An Apparatus Using the Method |
| JP2004000916A (en) | 2002-04-25 | 2004-01-08 | Canon Inc | Decomposition device for material to be decomposed and decomposition method therefor |
| FR2873595B1 (en) * | 2004-07-30 | 2007-06-29 | Brandt Ind Sas | PROCESS FOR THE TREATMENT OF VOLATILE ORGANIC COMPOUNDS OR GAS, IN PARTICULAR FOR A CIRCULATION CIRCULATION OF AN AIR FLOW |
| US20060153747A1 (en) * | 2005-01-13 | 2006-07-13 | Carrier Corporation | Gas treatment adsorption-oxidation system |
| JP2020032381A (en) * | 2018-08-31 | 2020-03-05 | ウシオ電機株式会社 | Gas treatment apparatus, gas treatment method |
-
1986
- 1986-01-13 JP JP61003601A patent/JPS62163730A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62163730A (en) | 1987-07-20 |
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| JPS6348574B2 (en) | ||
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| JPS6348573B2 (en) | ||
| JPS6348567B2 (en) | ||
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |