JP4642814B2 - Exhaust gas deodorization treatment system for paint drying furnace - Google Patents

Exhaust gas deodorization treatment system for paint drying furnace Download PDF

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JP4642814B2
JP4642814B2 JP2007173719A JP2007173719A JP4642814B2 JP 4642814 B2 JP4642814 B2 JP 4642814B2 JP 2007173719 A JP2007173719 A JP 2007173719A JP 2007173719 A JP2007173719 A JP 2007173719A JP 4642814 B2 JP4642814 B2 JP 4642814B2
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treatment
drying furnace
filter
exhaust gas
water
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JP2009011889A (en
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明人 宮下
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Toyota Motor East Japan Inc
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Kanto Auto Works Ltd
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本発明は、塗装乾燥炉から排出される悪臭ガスの脱臭処理システムに関するものである。   The present invention relates to a deodorizing treatment system for malodorous gas discharged from a paint drying furnace.

自動車ボデーその他塗装物の乾燥炉から排出される悪臭ガスを脱臭処理するには直燃式脱臭装置及び蓄熱式脱臭装置が主流であり、高温燃焼(750℃〜850℃)させ臭気分を酸化分解(脱臭)していた。   In order to deodorize odorous gases emitted from the drying furnace for automobile bodies and other painted products, direct combustion deodorizers and regenerative deodorizers are the mainstream. (Deodorized).

上記従来の脱臭処理では、燃焼に要するエネルギー(燃料)費用が莫大であり、高温燃焼のため設備の塗装工程内での維持管理が大変で、保守時の安全性に懸念を有しており、その上高価である。また、浮遊粒子状物質や光化学的オキシダントに係る大気汚染の状況は深刻であり、この浮遊粒子状物質や光化学的オキシダントの原因の一つに揮発性を有し大気中で気体となる有機化合物の総称である揮発性有機化合物(VOC)の排出を抑制することが必要である。塗装乾燥炉の排気ガスにはトルエン、キシレンの揮発性有機化合物(VOC)を含んでおり、これの排出を抑制する必要がある。   In the above conventional deodorization treatment, the energy (fuel) cost required for combustion is enormous, maintenance is difficult in the painting process of the equipment due to high temperature combustion, and there are concerns about safety during maintenance, In addition, it is expensive. In addition, air pollution conditions related to suspended particulate matter and photochemical oxidants are serious, and one of the causes of suspended particulate matter and photochemical oxidants is the volatility of organic compounds that become gases in the atmosphere. It is necessary to suppress emission of the volatile organic compound (VOC), which is a generic name. The exhaust gas of the paint drying furnace contains volatile organic compounds (VOC) of toluene and xylene, and it is necessary to suppress the emission thereof.

地球温暖化防止策が重要な課題となっている今日、自動車業界及び関連業界等においてCO2排出が多大な高温燃焼式に代わるべき脱臭方式が現存していない問題があった。
特開2001−310150公報 特開2002−331223公報 特開平7−8746公報
Today, global warming prevention measures have become an important issue, and there has been a problem in the automobile industry and related industries where there is no deodorization method that should replace the high-temperature combustion method that emits a large amount of CO2.
JP 2001-310150 A JP 2002-331223 A Japanese Patent Laid-Open No. 7-8746

本発明の目的は、CO2及びVOCの排出を最小限に抑えた大気の温暖化防止と安全性の高い常温処理(酸化)による塗装乾燥炉の排気ガス脱臭処理システムを提供することである。   An object of the present invention is to provide an exhaust gas deodorization treatment system for a coating drying furnace by room temperature treatment (oxidation) with high safety and prevention of atmospheric warming while minimizing CO2 and VOC emissions.

上記の目的を達成するための本発明は、請求項1に記載の通り、塗装乾燥炉の排気ガスをヤニ取フィルタにて水のミスト噴霧により冷却及び水溶化しヤニ及びガスをフィルタにて捕捉する第1処理と、前記第1処理された水溶湿気を除湿ユニットにて除湿する第2処理と、前記第2処理で除湿された気体中のヤニの粒子及び煙を電気集塵機にて除去する第3処理と、前記第3処理された気体を光触媒脱臭装置にて臭気成分を分解、脱臭する第4処理をして脱臭しCO2及びVOCを低減することを特徴とするものである。   In order to achieve the above object, according to the present invention, the exhaust gas of the coating drying furnace is cooled and water-soluble by mist spraying of water with a filter for removing paint and trapping the gas and gas with the filter. A first treatment, a second treatment for dehumidifying the first treated water-soluble moisture by a dehumidifying unit, and a third for removing dust particles and smoke in the gas dehumidified by the second treatment by an electric dust collector. The third treatment gas is subjected to a fourth treatment for decomposing and deodorizing odor components by a photocatalyst deodorization apparatus to deodorize and reduce CO2 and VOC.

本発明によると、塗装乾燥炉の排気ガスの脱臭しCO2及びVOCの低減処理を常温酸化分解により処理エネルギー(燃料)費用を大幅に低減し、且つ塗装工程内での維持管理を容易とし保守時の安全性を確保した効果を有している。   According to the present invention, the exhaust gas of the coating drying furnace is deodorized and CO2 and VOC reduction treatment is performed at room temperature by oxidative decomposition to greatly reduce the processing energy (fuel) cost and facilitate maintenance in the painting process. It has the effect of ensuring safety.

以下本発明を実施するための最良の形態について図面に基づいて説明する。図1において1は第1処理するヤニ取フィルタ、2は第2処理する除湿ユニット、3は第3処理する電気集塵機、4は第4処理する光触媒脱臭装置である。   The best mode for carrying out the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a dust removing filter for first treatment, 2 denotes a dehumidifying unit for second treatment, 3 denotes an electrostatic precipitator for third treatment, and 4 denotes a photocatalyst deodorizing device for fourth treatment.

本発明は、塗装乾燥炉の排気ガスをヤニ取フィルタ1にて水のミスト噴霧により冷却及び水溶化しヤニ及びガスをフィルタにて捕捉する第1処理と、前記第1処理された水溶湿気を除湿ユニット2にて除湿する第2処理と、前記第2処理で除湿された気体中のヤニの粒子及び煙を電気集塵機3にて除去する第3処理と、前記第3処理された気体を光触媒脱臭装置4にて臭気成分を分解、脱臭する第4処理して脱臭しCO2及びVOCを低減することを特徴とする塗装乾燥炉の排気ガス脱臭処理システムである。   The present invention includes a first treatment in which exhaust gas from a paint drying furnace is cooled and water-soluble by spraying water with a mist spray filter 1 and trapped with the filter, and the first treated water-soluble moisture is dehumidified. A second process for dehumidifying in the unit 2; a third process for removing dust particles and smoke in the gas dehumidified by the second process by the electric dust collector 3; and a photocatalyst deodorizing for the third processed gas. An exhaust gas deodorization treatment system for a paint drying furnace characterized in that CO2 and VOC are reduced by performing a fourth treatment of decomposing and deodorizing odor components in the device 4.

前記ヤニ取フィルタ1は水のミスト噴霧装置とフィルタを備えており、このフィルタは圧力損失が極めて小さく、耐熱性、耐腐食性、除去性の高いロータリ式グリスフィルタあるいはデミスターフィルタが適当である。   The scavenging filter 1 is provided with a water mist spraying device and a filter, and this filter is suitably a rotary grease filter or a demister filter with extremely small pressure loss and high heat resistance, corrosion resistance, and removability.

この第1処理のヤニ取フィルタ1では、塗装乾燥炉内での高温(220℃)焼き付けによる化学反応で生成された悪臭成分・有害物質を含んだ高温の排気ガスを水のミスト噴霧により瞬時冷却して潜熱を奪った瞬間に水溶化し、その後水分子と結合したヤニ及びガスをフィルタにて捕捉する。この時水溶化したヤニはフィルタから自重落下する。これにより、従来は硬化したヤニの清掃には薬品等の溶剤を必要としていたが、この第1処理では自浄作用する利点を有している。   In this first treatment filter, the high-temperature exhaust gas containing malodorous and harmful substances generated by the chemical reaction by baking at a high temperature (220 ° C.) in the coating drying furnace is instantly cooled by water mist spraying. As soon as the latent heat is taken away, it becomes water-soluble and then traps and gas bound to water molecules are captured by a filter. At this time, the water-solubilized spider falls by its own weight from the filter. Thus, conventionally, a solvent such as a chemical is required for cleaning the cured resin, but this first treatment has an advantage of self-cleaning.

前記ヤニ取フィルタ1におけるフィルタをロータリ式グリスフィルタあるいはデミスターフィルタを用いることによりロータリ式グリスフィルタでは火災誘発因子(オイルミスト)を流入させない清潔性と安全性を有し、除去率99.72%、静圧性(終期清静圧127Pa/面速1.1m/secの特性を有する。また、デミスターフィルタでは細い金属線をメリヤス状に編み、これを数枚1組として交互に重ね合わせたものであるから、90%以上の空間率を有しているため、圧力損失が極めて小さく、耐熱性、耐腐食性に優れており、高い捕集効率を有する。   By using a rotary grease filter or a demister filter as the filter in the dust removing filter 1, the rotary grease filter has cleanliness and safety that does not allow fire-inducing factors (oil mist) to flow in, and the removal rate is 99.72%. Static pressure (final static pressure of 127 Pa / surface speed of 1.1 m / sec. Also, in the demister filter, a thin metal wire is knitted into a knitted shape, and several of them are alternately stacked as a set. Because of the space ratio of 90% or more, the pressure loss is extremely small, the heat resistance and the corrosion resistance are excellent, and the collection efficiency is high.

第2処理の除湿ユニット2では、前記第1処理で水溶化させたため、水溶湿気を除湿する。この除湿により前記冷却時のドレン水にはヤニ、臭気物質も含まれて排出される。   In the dehumidifying unit 2 in the second process, the water-soluble moisture is dehumidified because the water is solubilized in the first process. Due to this dehumidification, the drain water at the time of cooling also contains dust and odorous substances and is discharged.

第3処理の電気集塵機3では、気体中の煙を消し、ヤニ(臭気を含んでいる)の粒子を捕捉する。この時水溶化したヤニ粒子は自重落下しドレン化する。   In the electrostatic precipitator 3 of the third treatment, smoke in the gas is extinguished and particles of ani (containing odor) are captured. At this time, the water-solubilized particle will fall by its own weight and drain.

第4処理の光触媒脱臭装置4では、光触媒酸化チタン(TiO2)のフィルタに紫外線を照射することにより、活性酸素が発生し排気ガス成分を分解する結果無害な水と炭酸ガスに変化してVOCの臭気成分(有機化合物等)を分解、脱臭する。   In the photocatalyst deodorizing apparatus 4 of the fourth treatment, by irradiating the photocatalytic titanium oxide (TiO2) filter with ultraviolet rays, active oxygen is generated and the exhaust gas components are decomposed, resulting in harmless water and carbon dioxide gas. Decomposes and deodorizes odor components (organic compounds, etc.).

上記第1処理〜第4処理を経た塗装乾燥炉の排気ガスは、煙を消去しヤニの除去及び脱臭処理されて無害な水及び低減したCO2及びVOCを排出する。因みにCO2は約75%低減された。   The exhaust gas of the coating and drying furnace that has undergone the first to fourth treatments eliminates smoke, removes spider, and deodorizes to discharge harmless water and reduced CO2 and VOC. Incidentally, CO2 was reduced by about 75%.

尚、第1処理のヤニ取フィルタ1以外の除湿ユニット2、電気集塵機3及び光触媒脱臭装置4は市販されている既存の機器が用いられる。   As the dehumidifying unit 2, the electric dust collector 3, and the photocatalyst deodorizing apparatus 4 other than the first treatment dust removing filter 1, existing devices that are commercially available are used.

このように本発明は、塗装乾燥炉から排出される悪臭ガスの脱臭処理を従来のように高温燃焼ではなく常温処理するものであるから、設備費及びCO2及びVOCの発生量が大幅減となり、処理エネルギー費用が著しく低減し、塗装工程内での維持管理を容易とし保守時の安全性が確保され、地球温暖化防止策に寄与する利点を有している。   As described above, the present invention treats the deodorizing treatment of malodorous gas discharged from the coating drying furnace at room temperature instead of high temperature combustion as in the prior art, so the equipment cost and the amount of CO2 and VOC generated are greatly reduced. The cost of processing energy is remarkably reduced, maintenance in the painting process is facilitated, safety at the time of maintenance is ensured, and there are advantages that contribute to global warming prevention measures.

本発明システムを示すブロック図Block diagram showing the system of the present invention

符号の説明Explanation of symbols

1 ヤニ取フィルタ
2 除湿ユニット
3 電気集塵機
4 光触媒脱臭装置
1 Smear filter 2 Dehumidification unit 3 Electric dust collector 4 Photocatalyst deodorization device

Claims (1)

塗装乾燥炉の排気ガスをヤニ取フィルタにて水のミスト噴霧により冷却及び水溶化しヤニ及びガスをフィルタにて捕捉する第1処理と、前記第1処理された水溶湿気を除湿ユニットにて除湿する第2処理と、前記第2処理で除湿された気体中のヤニの粒子及び煙を電気集塵機にて除去する第3処理と、前記第3処理された気体を光触媒脱臭装置にて臭気成分を分解、脱臭する第4処理をして脱臭しCO2及びVOCを低減することを特徴とする塗装乾燥炉の排気ガス脱臭システム。   A first treatment for cooling and water-solubilizing the exhaust gas of the paint drying furnace by a mist spray of water with a filter for removing dust and capturing the dust and gas with a filter, and dehumidifying the water-humidity treated with the first treatment with a dehumidifying unit. The second treatment, the third treatment for removing dust particles and smoke in the gas dehumidified in the second treatment with an electric dust collector, and the third treated gas for decomposing odor components with a photocatalyst deodorizer An exhaust gas deodorization system for a paint drying furnace, characterized by performing a fourth process for deodorizing and deodorizing to reduce CO2 and VOC.
JP2007173719A 2007-07-02 2007-07-02 Exhaust gas deodorization treatment system for paint drying furnace Expired - Fee Related JP4642814B2 (en)

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JP2011092910A (en) * 2009-11-02 2011-05-12 Okawara Mfg Co Ltd Waste gas deodorization apparatus
KR101229985B1 (en) 2010-08-19 2013-02-19 센텍(주) Device for pre-treating contaminated air and deordorizing system using the same
KR101485776B1 (en) * 2014-06-30 2015-01-27 주식회사 메트로엔지니어링 Dust and offensive odor removal apparatus of ascon plan using a corona discharge
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JP2003339833A (en) * 2002-05-22 2003-12-02 Toyota Motor Corp Circulation-type photocatalyst deodorizing device and deodorizing system using the same
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109453592A (en) * 2018-11-14 2019-03-12 广东科霖环保设备有限公司 A kind of industrial organic waste-gas purification processing system outfit

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