JPH0741140B2 - Method and device for removing solvent from exhaust of paint baking drying furnace - Google Patents
Method and device for removing solvent from exhaust of paint baking drying furnaceInfo
- Publication number
- JPH0741140B2 JPH0741140B2 JP2411773A JP41177390A JPH0741140B2 JP H0741140 B2 JPH0741140 B2 JP H0741140B2 JP 2411773 A JP2411773 A JP 2411773A JP 41177390 A JP41177390 A JP 41177390A JP H0741140 B2 JPH0741140 B2 JP H0741140B2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- water
- exhaust
- solvent
- exhaust gas
- 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 - Fee Related
Links
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、塗装焼付乾燥炉の排ガ
ス中の溶剤除去方法及びその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing a solvent from exhaust gas of a paint baking drying furnace.
【０００２】[0002]
【従来の技術】一般に、塗装工程において塗装後に焼付
乾燥炉で被塗装物の焼付乾燥を行なっている。例えば、
製缶工程においては缶内面となる部分に、缶胴成形後又
は成形前のブランクの状態で塗装を行なっており、塗装
後は焼付乾燥炉（オーブン）に送って焼付乾燥を行なっ
ている。塗装焼付乾燥炉の排気には、塗料から発する有
害な溶剤が含まれており、その濃度が所定以下、例え
ば、最も規制が厳しい所ではセロソルブ系溶剤濃度が１
０ppm以下等でないと大気に放出することができないよ
うに規制している。そのため、塗装焼付け炉の排気は、
溶剤が所定値以下の濃度になるように排気処理を行なっ
てから大気中に放出している。従来、塗装焼付乾燥炉の
排気処理は、排気を燃焼させることにより処理してい
る。しかしその場合、危険性が高く高度の安全管理を必
要とし、且つ排気を燃焼させるための燃料が必要であ
り、運転コストが高くなる欠点があると共に、燃焼で多
くの炭酸ガスを発するので、近時問題になっている地球
温暖化現象上からも好ましくない。また、設備も大型で
広い設置スペースを必要とする。2. Description of the Related Art Generally, in a painting process, after painting, an object to be coated is baked and dried in a baking and drying furnace. For example,
In the can manufacturing process, the inner surface of the can is coated in a blank state after forming the can body or before forming, and after coating, it is sent to a baking and drying oven (oven) for baking and drying. Exhaust gas from the baking / drying oven contains harmful solvent emitted from the paint, and its concentration is below a certain level. For example, in the most strict regulations, the cellosolve solvent concentration is 1
It is regulated that it cannot be released into the atmosphere unless it is below 0ppm. Therefore, the exhaust of the paint baking furnace is
The solvent is exhausted to a concentration below a predetermined value and then released into the atmosphere. Conventionally, the exhaust treatment of a paint baking drying furnace is performed by burning the exhaust. However, in that case, there is a drawback that the risk is high and a high level of safety management is required, and that fuel for burning the exhaust gas is required, and the operating cost becomes high, and a large amount of carbon dioxide gas is emitted by the combustion, so It is not preferable in view of the global warming phenomenon, which has become a problem in time. Also, the equipment is large and requires a large installation space.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記従来の
塗装焼付乾燥炉の排気における溶剤除去処理の欠点を解
消しようとするものであり、排気を燃焼させることな
く、大気汚染防止法又は各地方自治体の条例による規制
値以下に溶剤を除去することができ、しかも従来よりも
ランニングコストを低減化できる塗装焼付乾燥炉の排気
中の溶剤除去方法及び装置を提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention is intended to eliminate the drawbacks of the solvent removal treatment in the exhaust gas of the above-mentioned conventional coating baking drying furnace, and it is possible to prevent the air pollution by using the method for preventing the air pollution or burning the exhaust gas without burning the exhaust gas. It is an object of the present invention to provide a method and a device for removing a solvent from an exhaust gas of a coating baking drying furnace, which can remove a solvent to a value equal to or less than a regulation value according to the regulations of a local government and reduce a running cost as compared with a conventional method.
【０００４】[0004]
【課題を解決するための手段】近時、缶内面塗料は水性
塗料化する傾向にある。本発明者は、この点に着目して
研究を重ねた結果、湿式フィルタを用いて排気を積極的
に水に接触させることによって排気中の溶剤を除去でき
ることを見出し、本発明に到達したものである。[Means for Solving the Problems] Recently, the paint on the inner surface of a can tends to be a water-based paint. As a result of repeated research focusing on this point, the present inventor has found that the solvent in the exhaust gas can be removed by actively contacting the exhaust gas with water using a wet filter, and has arrived at the present invention. is there.
【０００５】即ち、本発明の塗装焼付乾燥炉の排気中の
溶剤除去方法は、焼付乾燥炉の排気通路に、フィルタチ
ャンバーを設け、該フィルタチャンバー内に排気流に対
向して耐熱性のあるフィルタを設け、該フィルタに排気
流方向から水をスプレーすると共に、フィルタ上部から
水をドリップしてフィルタに薄い水膜を形成して、排気
を水に衝突させることにより、排気中の溶剤を水に吸収
させて除去することを特徴とするものである。That is, the method for removing the solvent in the exhaust gas of the coating and baking oven of the present invention is such that a filter chamber is provided in the exhaust passage of the baking oven, and a heat resistant filter is provided in the filter chamber so as to face the exhaust flow. By spraying water from the exhaust flow direction on the filter, drip the water from the upper part of the filter to form a thin water film on the filter, and collide the exhaust with the water, thereby converting the solvent in the exhaust into water. It is characterized by being absorbed and removed.
【０００６】前記フィルタとしては、エキスパンドメタ
ル状の金属製フィルタが耐熱性があり且つ排ガス流の圧
力損失が少ない点で望ましい。そして該フィルタを排気
流の方向に沿って間隔をおいて複数段設けることによっ
て、より効率良く溶剤を吸収することができる。その場
合、最上流側のフィルタにスプレー及びドリップする水
は、下流側のフィルタにスプレー及びドリップした水を
回収して使用しても、新水を使用した場合と比較して除
去率の低下は僅かであるので、水の使用量と汚水量を低
下させる上で回収水を使用するのが望ましい。最後段の
フィルタの下流側に、デミスターを設け、溶剤除去処理
後の排気中に含まれる水分を除去するようにした。ま
た、チャンバーの入口に排気通路に突出する邪魔板を設
けて、排気流の整流効果を持たせている。[0006] As the filter, an expanded metal metal filter is preferable because it has heat resistance and a small pressure loss of the exhaust gas flow. By providing the filters in a plurality of stages at intervals along the exhaust flow direction, the solvent can be more efficiently absorbed. In that case, even if the water sprayed and dripted on the most upstream filter is collected and used for the downstream filter, the removal rate will not decrease compared to the case where new water is used. Since it is small, it is desirable to use recovered water in order to reduce the amount of water used and the amount of wastewater. A demister was provided on the downstream side of the last filter to remove the water contained in the exhaust gas after the solvent removal treatment. In addition, a baffle projecting into the exhaust passage is provided at the entrance of the chamber to have a rectifying effect on the exhaust flow.
【０００７】[0007]
【作用】本発明は、水性塗料の特性を利用して、塗装焼
付乾燥炉の排気を湿式フィルタを通すことによって、水
に接触させ溶剤を水に吸収させて除去するものである。
排気はフィルタチャンバー入口で邪魔板で整流され、フ
ィルタチャンバー内に設けられたフィルタ面に均一に衝
突するが、フィルタ面に達するまでに、排気と同一方向
でスプレーされた水滴が蒸発する際に排ガス中から蒸発
潜熱を奪うため冷却され、沸点の高い溶剤は液化し、ス
プレーされた水と接触することによって水に吸収され
る。また、フィルタ面には、風上から水をスプレーする
と共に上部から水をドリップするため、フィルター面全
体に薄い均一な水膜を安定して形成することができ、フ
ィルタに達した排気を確実に水に衝突させることがで
き、排気はさらに冷却され未溶解の溶剤も溶解して回収
される。 フィルタに衝突した排気は、フィルタがエキス
パンドメタル状のフィルタ板を切り起こし角度が互いに
９０°で交差するようにして複数枚重ねて構成されてい
るため、切り起こしに衝突して方向変えながら旋回する
ように進む。その結果、排ガスはフィルタ面の水膜との
接触が多くなり、効率良く溶剤が吸収される。しかも、
エキスパンドメタル状フィルタ板は、目が粗いので、従
来のフィルタに比べて圧力損失が少ない。フィルタを多
段に設けても、溶剤除去は１段目が主に寄与するが、複
数段設けることによって、１段目で除去されなかったも
のをさらに２段目を通過することによって、より確実に
除去することができると共に、２段目湿式フィルタ装置
を設けることによって背圧により１段目のフィルタに均
一に排気を衝突させる作用をし、除去効率を高めること
ができる。The present invention utilizes the characteristics of the water-based paint to pass the exhaust gas of the coating baking drying furnace through a wet filter to bring it into contact with water to absorb the solvent and remove it.
Exhaust is rectified by baffles in the filter chamber inlet, but impinges uniformly on the filter surface provided in the filter chamber, to reach the filter surface, the exhaust in the same direction
Evaporate from the exhaust gas when water droplets sprayed in
It is cooled to remove latent heat, and the solvent with a high boiling point is liquefied and
Absorbed into the water by coming into contact with the water played
It Also, spray water from the windward on the filter surface.
In addition to dripping water from the top with
A thin and uniform water film can be stably formed on the body,
The exhaust that reaches the filter can be made to collide with water without fail.
The exhaust gas is further cooled and the undissolved solvent is also dissolved and collected.
To be done. The exhaust that collides with the filter is extracted by the filter.
Cut and raise the banded metal filter plate so that the angles are
It is constructed by stacking multiple sheets so that they intersect at 90 °.
Therefore, it collides with the cut and raised and turns while changing direction
To proceed. As a result, the exhaust gas forms a water film on the filter surface.
The number of contacts increases, and the solvent is efficiently absorbed. Moreover,
Expanded metal filter plates have coarse meshes, so
Less pressure loss than conventional filters. Even if filters are provided in multiple stages, the first stage mainly contributes to solvent removal, but by providing multiple stages, it is possible to more reliably pass the solvent that was not removed in the first stage through the second stage. In addition to being able to remove the exhaust gas, the second stage wet filter device is provided so that the exhaust gas can uniformly collide with the first stage filter due to the back pressure, and the removal efficiency can be improved.
【０００８】[0008]
【実施例】以下、本発明の実施例を図面に基づき詳細に
説明する。図１は本発明装置の一実施例の概略図であ
り、図２は製缶ラインに適用した場合の塗装焼付乾燥炉
に配置した全体概略図を示している。図２において、１
は塗装焼付乾燥炉であり、前工程で内面塗装された缶が
炉内を通過するコンベヤ２によって搬送され、搬送中に
焼付乾燥が行なわれ、炉外に搬送される。３は焼付乾燥
炉の排気ダクトであり、その途中に排気ファン４が設け
られ、その下流側に本発明に係る溶剤除去装置５が設け
られている。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a schematic view of an embodiment of the apparatus of the present invention, and FIG. 2 is a schematic view of the entire apparatus arranged in a coating / baking / drying furnace when applied to a can manufacturing line. In FIG. 2, 1
Is a paint baking drying furnace, in which cans whose inner surfaces are coated in the previous step are conveyed by a conveyor 2 passing through the inside of the furnace, baking and drying are performed during the conveyance, and the outside is conveyed. Reference numeral 3 denotes an exhaust duct of a baking and drying furnace, an exhaust fan 4 is provided in the middle of the exhaust duct, and a solvent removing device 5 according to the present invention is provided downstream thereof.
【０００９】溶剤除去装置５は、図１に示すように、入
口側が焼付乾燥炉からの入口側ダクト３に連接され、出
口側が大気に開放する排気ダクト６に連接されているフ
ィルタチャンバー７を有し、その入口側の底壁部から排
気路中にほぼ３０°〜４５°傾斜突出して邪魔板８を設
け、ダクトからフィルタチャンバーに侵入する排気に乱
流を起させ、チャンバー内に設けられたフィルタに排気
流が均一に衝突するようにしてある。チャンバーの内部
は排気方向に沿って２段の湿式フィルタ装置１０、１１
及びデミスター１２によって区画されている。As shown in FIG. 1, the solvent removing device 5 has a filter chamber 7 whose inlet side is connected to an inlet side duct 3 from the baking and drying furnace and whose outlet side is connected to an exhaust duct 6 which is open to the atmosphere. Then, the baffle plate 8 is provided so as to project from the bottom wall portion on the inlet side thereof in the exhaust passage at an angle of approximately 30 ° to 45 °, and a turbulent flow is generated in the exhaust gas that enters the filter chamber from the duct, and the baffle plate 8 is provided in the chamber. The exhaust stream impinges uniformly on the filter. The inside of the chamber has two stages of wet filter devices 10, 11 along the exhaust direction.
And is divided by the demister 12.
【００１０】湿式フィルタ装置１０、１１は、エキスパ
ンドメタル状の目が比較的粗くて圧力損失が少なく、且
つ耐熱性、耐薬品性に優れているステンレスフィルタ板
を、切り起し角度が互いに９０°で交叉するようにして
複数枚組み合わせて、そこを通過する排気との衝突面積
を増やすようにしたフィルタ１４、１５を有し、該フィ
ルタの上部からフィルタ面に沿って水をドリップすると
共に、フィルタの上流側、つまり風上からフィルタ面全
体に水をスプレーすることによってフィルタに薄い均一
な水膜を形成するように形成してある。１６、１７はそ
のためにフィルタの上流側に配置されたスプレーノズル
であり、フィルタ一枚につき、ノズル１個の組合せで溶
剤除去性能に応じて、スプレー水量を個々に調節できる
ようになっている。１８、１９は各フィルタの上部に配
置されたドリップノズルである。本実施例では、後述す
るように、１段目の湿式フィルタ装置１０で使用する水
は、２段目の湿式フィルタ装置１１からの排水をタンク
２０に溜めて、それを利用している。２１はそのための
ポンプである。２段目の湿式フィルタ装置は新水を使用
している。新水としては、排水処理後の放流水又は工水
を用いる。In the wet filter devices 10 and 11, stainless steel filter plates, which are expanded metal-like meshes having relatively coarse meshes, small pressure loss, and excellent heat resistance and chemical resistance, are cut and raised at an angle of 90 °. The filters 14 and 15 are arranged so as to increase the collision area with the exhaust gas passing therethrough, and water is drip along the filter surface from the upper part of the filter and It is formed so that a thin and uniform water film is formed on the filter by spraying water on the entire surface of the filter from the upstream side, that is, from the windward side. Therefore, 16 and 17 are spray nozzles arranged on the upstream side of the filter, and the amount of spray water can be individually adjusted according to the solvent removal performance by combining one nozzle per filter. Reference numerals 18 and 19 denote drip nozzles arranged above the filters. In the present embodiment, as will be described later, as the water used in the first-stage wet filter device 10, the wastewater from the second-stage wet filter device 11 is collected in the tank 20 and used. 21 is a pump therefor. The second stage wet filter device uses fresh water. As fresh water, discharged water or industrial water after wastewater treatment is used.
【００１１】デミスター１２は、前記湿式フィルタ装置
を通過した排気の水滴を回収するためのものであり、本
実施例では前記湿式フィルタ装置のフィルタと同様なス
テンレスフィルタを採用した。２２は風量設定用のダン
パである。The demister 12 is for collecting water droplets of the exhaust gas that has passed through the wet filter device, and in this embodiment, a stainless filter similar to the filter of the wet filter device is adopted. Reference numeral 22 is a damper for setting the air volume.
【００１２】以上のような装置によって、本発明の方法
の効果を確認するために次のような実験を行なった。水
性塗料で内面塗装したＤＩ缶の焼付乾燥炉からの排気装
置に前記実施例装置を適用し、設定条件として排気のフ
ィルタ通過速度１m/sec、基準排気量１０m3N/minに対し
て、スプレー水量及びドリップ水量を２，３，４L/min
にそれぞれ変えて、その場合の排気中の溶剤濃度変化、
圧力損失について、それぞれ測定した。その結果を表１
に示す。The following experiment was carried out in order to confirm the effect of the method of the present invention using the above apparatus. The apparatus of the above-mentioned example was applied to the exhaust device from the baking and drying furnace of the DI can whose inner surface was coated with the water-based paint, and the spray condition was set to 1 m / sec and the standard exhaust amount was 10 m 3 N / min. Water volume and drip water volume are 2, 3, 4 L / min
Change the solvent concentration in the exhaust gas in that case,
Each pressure loss was measured. The results are shown in Table 1.
Shown in.
【表１】 [Table 1]
【００１３】上記表から明らかなように、本装置を採用
することによって、排気中の有害物質である溶剤を全体
的な数値として略４０〜６０％の除去効率で除去するこ
とができ、前記スプレー水量及びドリップ水量を選定す
ることによって大気中に放出が認められる基準濃度以下
に溶剤を除去することができ、本装置が排気中の溶剤除
去に十分適用できることが確認された。上記諸条件のう
ちスプレー、ドリップの水量は、少なくても多過ぎても
除去効率が低下することが確認され、本実験装置の場合
３．０L/minの場合が最も除去効率が高かった。また、
１段目及び２段目ともに新水を使用した場合と１段目を
２段目で使用した水を回収して使った場合を比較する
と、上記表においてテスト１と４、２と５、３と６が略
対応するが、テスト１と４の場合を除き、その除去効率
は新水の場合が若干高いが大差がなく、一段目に２段目
で使った水を使用しても、特にテスト５の場合はＢＡ、
ＢＣ、ＨＣ共にその濃度を略１０ppm以下に押えること
ができた。従って、水消費量を少なくし汚水を少なくす
るには、テスト５の場合のような条件で行なうのが望ま
しい。また、圧力損失は、７〜１０mmAqで圧力損失は少
なかった。従って、炉電力容量も少なくてすむ。上記実
験において、第１段目で使用した水は、廃水処理を行な
ってから放流する。As is clear from the above table, by adopting this device, the solvent, which is a harmful substance in the exhaust gas, can be removed with a removal efficiency of about 40 to 60% as a whole numerical value, and the spray is used. It was confirmed that by selecting the amount of water and the amount of drip water, it is possible to remove the solvent below the standard concentration at which the release is recognized in the atmosphere, and this device can be sufficiently applied to remove the solvent in the exhaust gas. It was confirmed that the removal efficiency was lowered when the amount of water in the spray or drip was too small or too much among the above conditions, and the removal efficiency was highest in the case of the present experimental device at 3.0 L / min. Also,
Comparing the cases where new water is used for both the first and second stages and the case where the water used for the first stage is recovered and used, tests 1 and 4, 2, 5 and 3 are shown in the above table. 6 and 6 are almost the same, except for the cases of tests 1 and 4, the removal efficiency is slightly higher in the case of fresh water, but there is no big difference, and even if the water used in the first step is used, BA for test 5
The concentration of both BC and HC could be suppressed to about 10 ppm or less. Therefore, in order to reduce the amount of water consumed and the amount of dirty water, it is desirable to carry out the conditions as in Test 5. The pressure loss was 7 to 10 mmAq, which was small. Therefore, the furnace power capacity can be small. In the above experiment, the water used in the first step is discharged after the wastewater treatment.
【００１４】また、比較例として、上記装置において水
を用いず、即ち乾式フィルタの状態で同じようなテスト
を３回行なった結果、その場合の排気の溶剤濃度は表２
に示すようになった。As a comparative example, the same test was conducted three times in the above apparatus without using water, that is, in a dry filter state. As a result, the solvent concentration of the exhaust gas in that case is shown in Table 2.
It came to be shown in.
【表２】 以上のように、乾式の場合は殆ど溶剤は除去されない
が、本発明のように湿式フィルタにすることによって、
溶剤除去効率が著しく高くなり本発明の方法が排気中の
溶剤除去に有効な方法であるとが確認された。[Table 2] As described above, the solvent is hardly removed in the case of the dry type, but by using the wet filter as in the present invention,
It was confirmed that the solvent removal efficiency was remarkably increased and the method of the present invention was an effective method for removing the solvent in the exhaust gas.
【００１５】図３は本発明装置の他の実施例を示してい
る。本実施例は、通常の製缶ラインで使用される焼付乾
燥炉のように容量が大きい場合であり、その排気容量に
応じてフィルタチャンバー２９に各段のフィルタを、上
下方向及び幅方向に多段に重ねて設けてある。FIG. 3 shows another embodiment of the device of the present invention. This embodiment is a case where the capacity is large as in a baking and drying furnace used in a normal can making line, and filters of each stage are provided in the filter chamber 29 in accordance with the exhaust capacity thereof, and the filter chamber 29 has multiple stages in the vertical and width directions. It is provided on top of.
【００１６】図中、３０が１段目の湿式フィルタ装置、
３１が２段目の湿式フィルタ装置、３２がデミスター装
置であり、夫々が上下方向に前記実施例と同様にステン
レスのエキスパンドメタル状に加工してなるフィルタ３
３、３４、３５が図の実施例では３段に重ねられてい
る。そして、各フィルタに対してスプレーノズル３６、
３７、ドリップノズル３８、３９が設けられている。こ
の実施例の最上段にドリップした水はその下段のフィル
タに順次垂れ流れるので、下方の段になるにつれてノズ
ルからのドリップ水量を減らすように適宜調節する。In the figure, 30 is a first-stage wet filter device,
Reference numeral 31 is a wet filter device of the second stage, 32 is a demister device, and each of them is a filter 3 which is vertically processed into a stainless expanded metal like the above-mentioned embodiment.
In the illustrated embodiment, 3, 34 and 35 are stacked in three stages. Then, for each filter, a spray nozzle 36,
37 and drip nozzles 38 and 39 are provided. Since the water dripping at the uppermost stage of this embodiment flows down to the filter at the lower stage, the amount of drip water from the nozzle is adjusted appropriately as it goes to the lower stage.
【００１７】４０、４１、４２はそれぞれの排水ホッパ
ーであり、排水ホッパー４１、４２に集められた水は、
図示しないタンクに集められて１段目のスプレー及びド
リップ水として再び使用される。４３は邪魔板である。
以上、本発明の実施例について説明したが、本発明は製
缶工程での缶内面塗装の焼付乾燥炉に限らず、水性塗料
を使用した被塗装物品の塗装焼付乾燥炉であれば如何な
る形態の炉であっても適用できることは言うまでもな
い。Reference numerals 40, 41 and 42 are drainage hoppers, and the water collected in the drainage hoppers 41 and 42 is
It is collected in a tank (not shown) and used again as the first-stage spray and drip water. 43 is a baffle.
Although the embodiments of the present invention have been described above, the present invention is not limited to the baking and drying oven for coating the inner surface of the can in the can making process, but any form of coating baking and drying oven for the article to be coated using the water-based paint can be used. It goes without saying that it can be applied to a furnace.
【００１８】[0018]
【発明の効果】本発明によれば、排気中の水性塗料溶剤
を燃焼させることなく、大気中に放出が認められる基準
濃度以下の値に除去することができるので、従来と比較
して、排気を燃焼させる燃料が不要であり、省エネルギ
ーで且つ燃焼による大気汚染もない。EFFECTS OF THE INVENTION According to the present invention, the water-based paint solvent in the exhaust gas can be removed to a value lower than the standard concentration at which it can be released into the atmosphere without burning it. No fuel for burning is required, energy saving and no air pollution due to combustion.
【００１９】特に、フィルタに水を排気流方向からスプ
レーすると共に上方からドロップするようにしているの
で、排気がフィルタに達する間に冷却されると共に、フ
ィルタ面全体に薄い均一な水膜を形成することができ、
極めて効果的に溶剤を水に溶解させて除去させることが
できる。さらに、フィルタがエキスパンドメタル状のフ
ィルタ板を９０°方向を変えて複数枚重ねて構成されて
いるので、排気はフィルタ面の水膜と接触を繰り返しな
がら進み、効率良く溶剤が吸収される。しかも、エキス
パンドメタル状のフィルタ板は、目が粗いので、従来の
フィルタより圧力損失や目詰まりが少なく、排気量が低
下することが少ない。そして、従来の排気燃焼処理方式
と比べて、危険がなく、また装置の構造が簡単で重量も
軽く且つ設置スペースも少なくてすむので、省スペース
を図ることができると共に設置工事も簡単である。そし
て、維持管理も単にフィルタの定期的な洗浄を行なうの
みであるから、ランニングコストが安い。１段目のフィ
ルタに使用する水は、２段目以降に使用した水を再使用
できるから、水の使用量と汚水量を低下させることがで
きる。In particular, the filter is sprayed with water from the exhaust flow direction.
I try to drop it and drop it from above
So that the exhaust is cooled while it reaches the filter and
A thin and uniform water film can be formed on the entire filter surface,
It is very effective to dissolve the solvent in water and remove it.
it can. In addition, the filter is
It is composed by stacking multiple filter plates by changing the direction by 90 °.
Therefore, the exhaust gas must not repeatedly contact the water film on the filter surface.
The solvent is absorbed and the solvent is efficiently absorbed. Moreover, the extract
Since the banded metal filter plate has a coarse mesh,
Less pressure loss and clogging than filter, lower displacement
There are few things to give down. As compared with the conventional exhaust gas combustion treatment method, there is no danger, and the structure of the device is simple, the weight is light and the installation space is small, so that the space can be saved and the installation work is easy. The maintenance cost is low because the maintenance is performed only by regularly cleaning the filter. Since the water used for the first-stage filter can reuse the water used for the second-stage and subsequent stages, it is possible to reduce the amount of water used and the amount of dirty water.
【図１】本発明の実施例に係る塗装焼付乾燥炉の溶剤除
去装置の概略図である。FIG. 1 is a schematic diagram of a solvent removal device for a coating baking drying furnace according to an embodiment of the present invention.
【図２】図１の溶剤除去装置を塗装焼付乾燥炉に配置し
た状態での概略図である。FIG. 2 is a schematic view of a state in which the solvent removing device of FIG. 1 is arranged in a coating baking drying furnace.
【図３】本発明の他の実施例に係る塗装焼付乾燥炉の溶
剤除去装置の概略図である。FIG. 3 is a schematic view of a solvent removal device for a coating baking drying furnace according to another embodiment of the present invention.
１ 塗装焼付乾燥炉 ５ 溶剤除去装置 ７、２９ フィルタチャンバー ８、４３ 邪魔板 １０、１１、３０、３１ 湿式フィルタ装置 １２、３２ デミスター １４、１５、３３、３４ フィルタ １６、１７、３６、３７ スプレーノズル １８、１９、３８、３９ ドリップノズル 1 Coating Baking Drying Furnace 5 Solvent Removal Device 7, 29 Filter Chamber 8, 43 Baffle Plate 10, 11, 30, 31 Wet Filter Device 12, 32 Demister 14, 15, 33, 34 Filter 16, 17, 36, 37 Spray Nozzle 18, 19, 38, 39 Drip nozzle
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ０１Ｄ 53/34 ＺＡＢ 53/77 Ｂ０５Ｃ 9/14 Ｂ０５Ｄ 3/02 Ｚ 6804−4Ｄ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location B01D 53/34 ZAB 53/77 B05C 9/14 B05D 3/02 Z 6804-4D
Claims (6)
乾燥炉からの排気中の溶剤を除去する方法であって、焼
付乾燥炉の排気通路に、フィルタチャンバーを設け、該
フィルタチャンバー内に排気流に対向してエキスパンド
メタル状のフィルタ板を切り起し角度が互いに９０°で
交差するようにして複数枚重ね合わせて構成された金属
製のフィルタを設け、該フィルタに排気流方向から水を
スプレーすると共に、該フィルタ上部から水をドリップ
して該フィルタに薄い水膜を形成して、排気を水に衝突
させることにより、排気中の溶剤を水に吸収させて除去
することを特徴とする塗装焼付乾燥炉の排気中の溶剤除
去方法。1. A method for removing a solvent in exhaust gas from a baking stoving drying furnace for a coating object using a water-based paint, wherein a filter chamber is provided in an exhaust passage of the baking stoving furnace, and a filter chamber is provided in the filter chamber. Expanding against the exhaust flow
Cut and raise the metal filter plate and the angles are 90 ° to each other.
Metals constructed by stacking multiple sheets so that they intersect.
A filter made of water, spraying water from the exhaust flow direction on the filter, drip water from the upper part of the filter to form a thin water film on the filter, and make the exhaust collide with the water. A method for removing the solvent from the exhaust gas of a paint baking and drying furnace, characterized in that the solvent is removed by absorbing it in water.
フィルタチャンバー、該フィルタチャンバー内に排気流
に対向して設けられたエキスパンドメタル状のフィルタ
板を切り起し角度が互いに９０°で交差するようにして
複数枚重ね合わせて構成された金属製のフィルタ、該フ
ィルタに排気流方向の上流側から水をスプレーするスプ
レーノズル、前記フィルタの上部からフィルタ面に水を
ドリップするドリップノズルからなることを特徴とする
塗装焼付乾燥炉の排気中の溶剤除去装置。2. A filter chamber provided in the exhaust passage of the paint baking drying furnace, expanded metal-like filter disposed so as to face the exhaust stream into the filter chamber
Cut and raise the plates so that the angles intersect each other at 90 °
It is characterized by comprising a metal filter configured by stacking a plurality of sheets, a spray nozzle for spraying water from the upstream side in the exhaust flow direction to the filter, and a drip nozzle for drip water from the upper part of the filter to the filter surface. Solvent removal device from the exhaust of the paint baking and drying furnace.
隔をおいて複数段設けられている請求項２の塗装焼付乾
燥炉の排気中の溶剤除去装置。3. The apparatus for removing solvent from exhaust gas of a coating baking drying furnace according to claim 2 , wherein the filters are provided in a plurality of stages at intervals along the direction of exhaust gas flow.
けた請求項２又は３記載の塗装焼付乾燥炉の排気中の溶
剤除去装置。4. A device for removing a solvent from the exhaust gas of a coating baking oven according to claim 2 , wherein a demister is provided on the downstream side of the filter.
ドリップする水は、下流側のフィルタにスプレー及びド
リップした水を回収して使用する請求項３又は４記載の
塗装焼付乾燥炉の排気中の溶剤除去装置。5. The exhaust gas of a coating baking drying furnace according to claim 3 , wherein the water sprayed and dripted on the filter on the most upstream side is collected and used on the downstream filter. Solvent removal device.
通路に突出する邪魔板を設けた請求項２、３、４又は５
記載の塗装焼付乾燥炉の排気中の溶剤除去装置。6. The inlet of the filter chamber, according to claim 2, 3, 4 or 5 provided with a baffle plate which projects into the exhaust passage
A device for removing the solvent from the exhaust gas of the coating baking drying furnace described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2411773A JPH0741140B2 (en) | 1990-12-19 | 1990-12-19 | Method and device for removing solvent from exhaust of paint baking drying furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2411773A JPH0741140B2 (en) | 1990-12-19 | 1990-12-19 | Method and device for removing solvent from exhaust of paint baking drying furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04219119A JPH04219119A (en) | 1992-08-10 |
| JPH0741140B2 true JPH0741140B2 (en) | 1995-05-10 |
Family
ID=18520718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2411773A Expired - Fee Related JPH0741140B2 (en) | 1990-12-19 | 1990-12-19 | Method and device for removing solvent from exhaust of paint baking drying furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741140B2 (en) |
Cited By (2)
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| KR101394902B1 (en) * | 2013-04-29 | 2014-05-14 | (주)키이엔지니어링 | Solvent recovery system |
| KR101489333B1 (en) * | 2013-08-30 | 2015-02-04 | 린나이코리아 주식회사 | Draining and exhaust cooling system of combination steam oven and control method |
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| US6790653B2 (en) * | 2001-08-23 | 2004-09-14 | Bio-Reaction Industries, Llc | Biological filter apparatus with multiple filter units |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5110610A (en) * | 1974-07-15 | 1976-01-28 | Koyo Shoji Kk | SAHOOTOTSUKYUATSUJATSUKI |
| JPS59447B2 (en) * | 1974-09-03 | 1984-01-06 | 日本原子力研究所 | Fuji Yung Gas Seisei Houhou |
| JPS604921B2 (en) * | 1976-08-31 | 1985-02-07 | トヨタ自動車株式会社 | measuring device |
-
1990
- 1990-12-19 JP JP2411773A patent/JPH0741140B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101394902B1 (en) * | 2013-04-29 | 2014-05-14 | (주)키이엔지니어링 | Solvent recovery system |
| KR101489333B1 (en) * | 2013-08-30 | 2015-02-04 | 린나이코리아 주식회사 | Draining and exhaust cooling system of combination steam oven and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04219119A (en) | 1992-08-10 |
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