JPH0893438A - Mist eliminating device - Google Patents
Mist eliminating deviceInfo
- Publication number
- JPH0893438A JPH0893438A JP25127994A JP25127994A JPH0893438A JP H0893438 A JPH0893438 A JP H0893438A JP 25127994 A JP25127994 A JP 25127994A JP 25127994 A JP25127994 A JP 25127994A JP H0893438 A JPH0893438 A JP H0893438A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- mist
- coarse
- gas
- removing device
- 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
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、気体中に浮遊する微小
な液滴であるミスト、特に内燃機関におけるブローバイ
ガス中のオイルミストを、効率良く分離除去する装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for efficiently separating and removing mist, which is fine liquid droplets suspended in a gas, particularly oil mist in blow-by gas in an internal combustion engine.
【０００２】[0002]
【従来の技術】各種工業プロセスで発生する液滴やミス
ト、内燃機関のブローバイガスや空気駆動装置の圧縮空
気中のオイルミスト等の気体中に浮遊する液滴ないしミ
ストの中でも、粒径が約２０μｍ以上の液滴は、自然沈
降を利用して捕集する重力分離装置、又は気体の流路に
挿入した邪魔板等の障害物に衝突させて捕集する慣性分
離装置によって、ほぼ完全に分離除去することが可能で
ある。2. Description of the Related Art Among droplets and mists generated in various industrial processes, droplets or mists floating in a gas such as blow-by gas of an internal combustion engine or oil mist in compressed air of an air drive unit, the particle size is about Droplets of 20 μm or more are almost completely separated by a gravity separator that collects by utilizing natural sedimentation or an inertial separator that collects by colliding with an obstacle such as a baffle plate inserted in a gas flow path. It can be removed.
【０００３】しかし、粒径が１０〜２０μｍ以下のミス
トと呼ばれる微小な液滴は、重力分離装置や慣性分離装
置によって分離することが困難である。特に、自動車エ
ンジン等の内燃機関におけるブローバイガスに含まれる
オイルミストについては、粒径が１μｍ程度又はそれ以
下と極めて微細であるため、重力や慣性力を利用した除
去装置では分離除去できなかった。However, it is difficult to separate minute droplets called mist having a particle size of 10 to 20 μm or less by a gravity separator or an inertial separator. In particular, oil mist contained in blow-by gas in an internal combustion engine such as an automobile engine cannot be separated and removed by a removing device using gravity or inertial force because the particle size is extremely fine, about 1 μm or less.
【０００４】かかるミストの分離には、濾材によって捕
集する濾過分離装置、あるいは気体とミストの間に相対
的運動を起こさせて分離する装置、代表的には遠心力を
利用した分離装置（サイクロン）が使用されていた。と
ころが、濾過分離装置では、気体の流路に濾布や繊維充
填層等の炉材を配置するので、分離効率は高くなるもの
の、圧力損失が大きくなり又目詰まりも起こりやすい。
一方、サイクロン分離装置では、逆に圧力損失は小さく
且つ目詰まりも起こり難いが、大きな遠心力か十分長い
滞留時間を与えないと約１μｍ以下の微細なミストの分
離ができない欠点があった。For the separation of such mist, a filtration / separation device for collecting with a filter medium, or a device for separating by causing relative motion between gas and mist, typically a separation device utilizing a centrifugal force (cyclone) ) Was used. However, in the filtration / separation device, since the furnace material such as the filter cloth and the fiber-filled layer is arranged in the gas flow path, the separation efficiency is increased, but the pressure loss is increased and clogging is likely to occur.
On the other hand, in the cyclone separator, on the contrary, the pressure loss is small and clogging is unlikely to occur, but it has a drawback that fine mist of about 1 μm or less cannot be separated unless a large centrifugal force or a sufficiently long residence time is applied.
【０００５】又、荷電粒子は電場内においてその極性と
反対極性の電極の方向に移動する性質があるが、この静
電気力を利用してミストを分離する電気分離装置も知ら
れている。しかし、この装置は微細なミストの分離が可
能であるが、ミストが帯電していなければ利用すること
ができないという大きな欠点があるため、通常のオイル
ミストは電荷を有しないので、この電気分離装置より分
離することはできなかった。In addition, charged particles have the property of moving in the direction of an electrode having a polarity opposite to that of the charged particles in an electric field. An electric separation device for separating mist by utilizing this electrostatic force is also known. However, although this device can separate fine mist, it has a major drawback that it cannot be used unless the mist is charged. No more separation was possible.
【０００６】[0006]
【発明が解決しようとする課題】このように、気体中の
微小な液滴やミストを分離する従来のミスト分離装置で
は、分離効率を高めると圧力損失や目詰まりが生じやす
く、逆に圧力損失及び目詰まりを低減させると分離効率
が低下するという状況にあり、比較的簡単な装置で、圧
力損失及び目詰まりがなく、高い分離効率でミストを分
離除去することは困難な現状であった。As described above, in the conventional mist separating device for separating minute droplets or mist in the gas, if the separation efficiency is increased, pressure loss or clogging easily occurs, and conversely, pressure loss occurs. In addition, when the clogging is reduced, the separation efficiency is lowered, and it is difficult to separate and remove the mist with high separation efficiency with a relatively simple device without pressure loss and clogging.
【０００７】本発明は、かかる従来の事情に鑑み、気体
中に含まれるミスト、特に粒径が１μｍ以下の微細なミ
ストを効率良く分離除去することができ、しかも圧力損
失が低く且つ目詰まりが少ない、ミスト除去装置を提供
することを目的とする。In view of such conventional circumstances, the present invention can efficiently separate and remove mist contained in gas, especially fine mist having a particle size of 1 μm or less, and has low pressure loss and clogging. An object is to provide a small number of mist removing devices.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、本発明が提案するミスト除去装置においては、長さ
方向にほぼ平行に且つ互いに間隔をおいて配列した複数
の単繊維又は繊維糸からなり、気体中のミストを捕集し
て粗粒化し、粗粒ミストないし液滴として気体中に再飛
散させる粗粒化フィルターと、粗粒化フィルターから再
飛散した粗粒ミストないし液滴を気体から分離する分離
装置とを備えたことを特徴とする。In order to achieve the above object, in the mist removing device proposed by the present invention, a plurality of monofilaments or fiber yarns arranged substantially parallel to the longitudinal direction and spaced from each other are provided. , A coarse filter that collects mist in the gas to make it into coarse particles and then re-disperses it in the gas as coarse mist or droplets, and the coarse mist or droplets that have been re-sprayed from the coarse filter as gas. And a separating device for separating from.
【０００９】ここで、単繊維とは絹や化学繊維等のフィ
ラメント及び木綿や羊毛あるいは化学繊維等の短繊維
（ステープル）を含む意味であり、繊維糸とはこれらの
単繊維を数本集めて撚りをかけ若しくは紡績した糸を意
味する。繊維糸は１種類の単繊維からなるもののほか、
２種類以上の単繊維からなっていても良い。The term "single fiber" as used herein means a filament such as silk or chemical fiber and a short fiber (staple) such as cotton, wool or chemical fiber, and the term "fiber yarn" means a collection of several such single fibers. It means a twisted or spun yarn. Fiber yarn consists of one type of monofilament,
It may consist of two or more types of monofilaments.
【００１０】又、上記分離装置は、従来から液滴や通常
のミストの分離除去に用いられている装置であって良
く、例えば、自然沈降を利用した重力分離装置、慣性力
を利用した邪魔板等を備えるインパクタやルーバーのよ
うな慣性分離装置、遠心力を利用したサイクロン分離装
置が好ましい。The separating device may be a device that has been conventionally used for separating and removing droplets or normal mist. For example, a gravity separating device utilizing natural sedimentation, a baffle plate utilizing inertial force. An inertial separation device such as an impactor or louver provided with the above, or a cyclone separation device utilizing centrifugal force is preferable.
【００１１】[0011]
【作用】本発明のミスト除去装置においては、従来の重
力分離装置や慣性分離装置あるいは遠心力分離装置等で
は分離できなかった微細なミストを、まず粗粒化フィル
ターにより気体から捕集し、捕集した２又はそれ以上の
ミストを粗粒化フィルター上で合体又は合一させた後、
粗粒ミストないし液滴として気体中に再飛散させる。In the mist removing device of the present invention, fine mist which could not be separated by the conventional gravity separator, inertial separator, centrifugal separator or the like is first collected from the gas by the coarse-graining filter and collected. After coalescing or coalescing the collected two or more mists on the coarse-grained filter,
Redispersed in the gas as coarse mist or droplets.
【００１２】即ち、本発明における粗粒化フィルター
は、複数の単繊維又は繊維糸が長さ方向に平行し互いに
間隔をおいてすだれ状に配列しており、気体中に含まれ
るミストはこの単繊維又は繊維糸の近くを流れる時に単
繊維又は繊維糸に付着して捕集され、捕集された複数の
ミストは同一の又は隣接する単繊維又は繊維糸の上で合
体又は合一されることにより次第に粗粒化する。粗粒化
フィルター上で粗粒化したミストは、その自重と気体の
流れる圧力により粗粒化フィルターから自然に離れ、粗
粒ミストないし液滴となって気体中に再飛散する。That is, in the coarse-graining filter of the present invention, a plurality of single fibers or fiber threads are arranged in a comb shape in parallel with each other in the lengthwise direction and spaced from each other, and the mist contained in the gas is this single fiber. When flowing near a fiber or a fiber yarn, the mist attached to the single fiber or the fiber yarn is collected, and the collected mists are united or united on the same or adjacent single fiber or fiber yarn. The particles gradually become coarse by. The mist coarsened on the coarse-grained filter is naturally separated from the coarse-grained filter by its own weight and the pressure of the flowing gas, and becomes mist or droplets to be scattered again in the gas.
【００１３】この粗粒化フィルターの下流には、従来か
ら使用されている通常のミストの分離装置を配置してあ
るので、再飛散した粗粒ミストないし液滴を容易に捕集
して分離除去することができる。例えば、従来は通常の
分離装置では捕集不可能な粒径が１μｍ以下の微細なミ
ストであっても、本発明に係わる粗粒化フィルターによ
り粒径が１μｍを越える粗粒ミストに、好ましくは粒径
が約１０μｍ以上の液滴とすることにより、通常の分離
装置を用いて気体中のミストを高い効率で分離除去する
ことが可能となる。Since a conventional mist separating device which has been conventionally used is disposed downstream of the coarse-graining filter, the re-scattered coarse-mist or droplets can be easily collected and separated and removed. can do. For example, even a fine mist having a particle size of 1 μm or less that cannot be collected by a conventional separation device in the past, is preferably converted into a coarse mist having a particle size of more than 1 μm by the coarse particle filter according to the present invention, preferably By forming the droplets having a particle size of about 10 μm or more, it becomes possible to separate and remove the mist in the gas with high efficiency by using an ordinary separating device.
【００１４】粗粒化フィルターを構成する単繊維又は繊
維糸は、特に限定はなく、例えば、木綿、麻、羊毛、絹
等の天然繊維、レーヨン等の再生繊維、アセテート等の
半合成繊維、ナイロン、ポリエステル、アクリル、ポリ
エチレン、ポリプロピレン、アラミド等の有機合成繊
維、又はガラス繊維、炭素繊維、金属繊維、セラミック
ス繊維等の無機合成繊維であって良い。中でも、これら
の繊維のモノフィラメント又は紡績糸が好ましい。紡績
糸は糸の周囲に単繊維が多数突き出ているので、ミスト
の捕集に適している。The monofilament or fiber thread constituting the coarse-grained filter is not particularly limited, and examples thereof include natural fibers such as cotton, hemp, wool and silk, regenerated fibers such as rayon, semi-synthetic fibers such as acetate, nylon. , Organic synthetic fibers such as polyester, acrylic, polyethylene, polypropylene and aramid, or inorganic synthetic fibers such as glass fiber, carbon fiber, metal fiber and ceramic fiber. Of these, monofilaments or spun yarns of these fibers are preferable. The spun yarn is suitable for collecting mist because a large number of single fibers are projected around the spun yarn.
【００１５】一般に、気体中のミスト等の捕集に関して
は、単繊維等の単一の捕集体の捕集効率ηは、捕集体の
太さをｄf、この太さの捕集体に捕集され得るミストの
流入幅をｄeとすると： η＝ｄe／ｄf＝ｆ(Ｓｔｋ) で表される。In general, regarding the collection of mist in gas, the collection efficiency η of a single collector such as a single fiber is as follows: the thickness of the collector is d f , and the collector of this thickness is collected. the inflow width of the mist that may be When d e: represented by η = d e / d f = f (Stk).
【００１６】 ただし、Ｓｔｋ＝Ｃcρpｄp 2Ｕ0／ρμｄc Ｃc…カニンガムの補正係数 ρp…粒子密度 ｄp…粒子直径 Ｕ0…ガス速度 ρ…空気密度 μ…ガス粘性係数 ｄc…捕集体の代表長さHowever, Stk = C c ρ p d p 2 U 0 / ρ μ d c C c ... Cunningham's correction coefficient ρ p ... Particle density d p ... Particle diameter U 0 ... Gas velocity ρ ... Air density μ ... Gas viscosity coefficient d c ... Representative length of the collector
【００１７】従って、単繊維等の捕集体が集合したフィ
ルター全体の捕集効率Ｅは、フィルターにおける捕集体
の充填率をαとすると： Ｅ＝αη で表される。Therefore, the collection efficiency E of the whole filter in which the collection bodies such as the single fibers are collected is represented by E = αη, where α is the packing rate of the collection bodies in the filter.
【００１８】これらの式から、粗粒化フィルターの捕集
効率Ｅを高めるためには、捕集体を構成する単繊維又は
繊維糸の太さｄfを小さくすること、充填率αを大きく
すること、又はｄeが大きくなるように気体の通過速度
を大きくすることが、有効であることが分かる。しか
し、充填率αを大きくすると、圧力損失が増大し、又目
詰まりが発生しやすくなるので、圧力損失を少なく且つ
目詰まりを起こすことなく、高い捕集効率が達成できる
ように、単繊維又は繊維糸の太さ及び充填率を考慮して
その配列と配置を選択する。From these equations, in order to increase the collection efficiency E of the coarse-grained filter, the thickness d f of the single fibers or fiber threads constituting the collector should be reduced and the packing rate α should be increased. It can be seen that it is effective to increase the passage speed of gas so that, or d e increases. However, if the filling rate α is increased, the pressure loss increases, and clogging is likely to occur.Therefore, in order to achieve a high collection efficiency without reducing the pressure loss and causing clogging, the single fiber or The arrangement and arrangement are selected in consideration of the thickness and the filling rate of the fiber yarn.
【００１９】尚、本発明の粗粒化フィルターにおける単
繊維又は繊維糸の太さに関しては、ガスの流速によって
も異なるが、一般に１００μｍ以下であることが好まし
く、特に内燃機関におけるブローバイガス中の微細なオ
イルミストを効率良く分離除去するためには、２０〜４
０μｍの太さの単繊維又は繊維糸を使用することが好ま
しい。The thickness of the single fiber or the fiber thread in the coarse-grained filter of the present invention is preferably 100 μm or less, though it varies depending on the gas flow rate, and particularly fine particles in blow-by gas in an internal combustion engine. 20 to 4 in order to efficiently separate and remove various oil mists
Preference is given to using monofilaments or yarns with a thickness of 0 μm.
【００２０】次に、粗粒化フィルターを構成する複数の
単繊維又は繊維糸の配列ないし配置について説明する。
基本的には、複数の単繊維又は繊維糸を、一平面上で長
さ方向に平行に且つ互いに間隔をおいて、すだれ状に配
列する。このように単繊維又は繊維糸をすだれ状に配列
したすだれ状繊維層では、単繊維又は繊維糸の間隔を極
端に狭くしない限り、圧力損失や目詰まりは発生しにく
いが、反面ミストの捕集効率が低い。Next, the arrangement or arrangement of a plurality of single fibers or fiber yarns constituting the coarse grain filter will be described.
Basically, a plurality of monofilaments or fiber threads are arranged in a comb shape in a plane parallel to the longitudinal direction and spaced from each other. In the interdigital fiber layer in which the single fibers or the fiber threads are arranged like a comb, pressure loss and clogging are less likely to occur unless the distance between the single fibers or the fiber threads is extremely narrowed, but the mist is collected. Efficiency is low.
【００２１】そこで、このすだれ状繊維層で高い捕集効
率を得るためには、気体の流れ方向に対してほぼ直角方
向に複数のすだれ状繊維層を配置することが好ましい。
この場合、各すだれ状繊維層の配置関係は特に限定され
ず、例えば各すだれ状繊維層の平面を互いに平行にし又
は互いに傾け、あるいは各すだれ状繊維層の単繊維又は
繊維糸の長さ方向を互いに平行にし又は互いに傾けるこ
とができる。Therefore, in order to obtain a high collection efficiency with this interdigital fiber layer, it is preferable to arrange a plurality of interdigital fiber layers in a direction substantially perpendicular to the gas flow direction.
In this case, the arrangement relationship of each interdigital fiber layer is not particularly limited, and for example, the planes of each interdigital fiber layer are made parallel to each other or inclined with respect to each other, or the length direction of the single fiber or fiber yarn of each interdigital fiber layer is set. It can be parallel to each other or tilted to each other.
【００２２】又、いずれの場合においても、互いに隣接
する各すだれ状繊維層の単繊維又は繊維糸が、気体の流
れ方向に対してできるだけ互いに重ならないように配列
し、又は配置することが好ましい。更に、複数のすだれ
状繊維層は、夫々同一種類の繊維でも、異なる種類の繊
維からなっていても良い。In any case, it is preferable that the single fibers or the fiber threads of the interdigital fiber layers adjacent to each other are arranged or arranged so as not to overlap each other in the gas flow direction as much as possible. Furthermore, each of the plurality of interdigital fiber layers may be made of the same type of fibers or different types of fibers.
【００２３】上記のごとく複数層のすだれ状繊維層を配
置する場合、各すだれ状繊維層の単繊維又は繊維糸の太
さを、気体の流れ方向の上流及び下流のすだれ状繊維層
が中間部のすだれ状繊維層より太くなるように傾斜させ
ることが好ましい。このように配置することにより、粒
径の大きなミストは上流の太い単繊維又は繊維糸のすだ
れ状繊維層で及び粒径の小さなミストは中間部の細い単
繊維又は繊維糸のすだれ状繊維層でそれぞれ捕集されや
すく、しかも捕集されたミストは粗粒化と再飛散を繰り
返しながら中間部から下流の各すだれ状繊維層の間で次
第に粒径が大きく成長し、望ましい大きさの粗粒ミスト
ないし液滴となる。When a plurality of interdigital fiber layers are arranged as described above, the thickness of the single fiber or fiber yarn of each interdigital fiber layer is determined by the intermediary portions of the interdigital fiber layers upstream and downstream in the gas flow direction. It is preferable to incline so as to be thicker than the interdigital fiber layer. By arranging in this way, the mist with a large particle size is the upstream thick monofilament or fiber yarn interdigital fiber layer, and the small particle size mist is the intermediate thin monofiber or fiber yarn interdigital fiber layer. Each of them is easily collected, and the collected mist gradually grows in size between the intermediary and downstream interdigital fiber layers while repeating coarsening and re-scattering, and the coarse mist of the desired size is obtained. Or it becomes a droplet.
【００２４】又、一平面上ですだれ状に配列した複数の
単繊維又は繊維糸は、夫々単繊維又は繊維糸１をその両
端で固定するのが通常であるが、図１に示すように各単
繊維又は繊維糸１をほぼ直角方向に配列した単繊維又は
繊維糸からなる糸状支持材２により固定し、この糸状支
持材２をフィルターの枠体３に固定することによって、
単繊維又は繊維糸１の両端を解放しても良い。図１の構
造によれば、単繊維又は繊維糸１が気体の流れに伴って
曲がったり又は糸状支持材２を軸として回転し、気体中
に含まれる異物を排除しやすいので、目詰まり及びそれ
に伴う圧力損失を避けるのに有効である。Further, a plurality of monofilaments or fiber yarns arranged in a comb shape on one plane is usually obtained by fixing the monofilaments or fiber yarns 1 at both ends thereof, but as shown in FIG. By fixing the monofilament or the fiber thread 1 with the thread-like support material 2 made of the monofilament or the fiber thread arranged substantially at right angles, and fixing the thread-like support material 2 to the frame body 3 of the filter,
Both ends of the single fiber or the fiber yarn 1 may be released. According to the structure of FIG. 1, the single fiber or the fiber thread 1 bends with the flow of gas or rotates around the thread-shaped support material 2 to easily remove foreign matter contained in the gas. It is effective in avoiding the accompanying pressure loss.
【００２５】かかる図１のすだれ状繊維層は、上記のご
とく複数層配置することができ、しかも各繊維層ごとに
単繊維又は繊維糸１の太さや間隔を変えたり、繊維の種
類を変えることができることは言うまでもない。The interdigital fiber layers shown in FIG. 1 can be arranged in a plurality of layers as described above, and the thickness or spacing of the single fibers or the fiber threads 1 or the type of fibers can be changed for each fiber layer. It goes without saying that you can do it.
【００２６】粗粒化フィルターの目詰まりを防止し、圧
力損失の増大を抑制する手段としては、図１の構造の外
に、一平面上ですだれ状に配列した複数の単繊維又は繊
維糸を、交互に高弾性繊維と低弾性繊維とで構成する方
法もある。この場合、異物の付着により目詰まりが起こ
って圧力損失が増加すると、各単繊維又は繊維糸の弾性
率の違いから低弾性繊維からなる単繊維又は繊維糸が伸
び、目開きが大きくなって異物が排除されるため、フィ
ルターの性状が元に回復する作用がある。As means for preventing clogging of the coarse-grained filter and suppressing an increase in pressure loss, a plurality of single fibers or fiber yarns arranged in a comb shape on one plane are provided in addition to the structure shown in FIG. Alternatively, there is a method of alternately forming high elastic fibers and low elastic fibers. In this case, if clogging occurs due to the adhesion of foreign matter and the pressure loss increases, the monofilament or fiber yarn made of low-elasticity fiber stretches due to the difference in elastic modulus of each monofilament or fiber yarn, and the mesh size increases, resulting in foreign matter. Since it is eliminated, it has the effect of restoring the original properties of the filter.
【００２７】又、一平面上ですだれ状に配列した複数の
単繊維又は繊維糸を、交互に太い単繊維又は繊維糸と細
い単繊維又は繊維糸とで構成すれば、太い単繊維又は繊
維糸の両側は流速が上がると共に粒子の密度が高くな
り、その結果太い単繊維又は繊維糸の両側の細い単繊維
又は繊維糸によって捕集が効果的に行える。又、細い単
繊維又は繊維糸は剛性が低いためガス流によって変形し
易く、目詰まりが生じにくいという効果もある。Further, if a plurality of monofilaments or fiber yarns arranged in a comb shape on one plane are alternately composed of thick monofilaments or fiber yarns and thin monofilaments or fiber yarns, thick monofilaments or fiber yarns are formed. On both sides of the particle, the density of particles increases with increasing flow velocity, and as a result, the collection can be effectively performed by the thin monofilament or fiber thread on both sides of the thick monofilament or fiber thread. Further, since the thin monofilament or the fiber yarn has low rigidity, it is easily deformed by the gas flow, and there is an effect that clogging is less likely to occur.
【００２８】尚、粗粒化フィルターの下流に配置する分
離装置については、従来から液滴や通常のミストの分離
除去に用いられている装置であって良いことは前記した
が、気体から分離された粗粒ミストや液滴が出口パイプ
側に流出しないように、液膜トラップを備えることが好
ましい。即ち、分離装置で気体から分離された粗粒ミス
トや液滴は分離装置の内壁に液膜として残るが、この液
膜が出口パイプ側に流出しないように、例えば出口パイ
プを分離装置内に突き出した構造等の、液膜トラップを
設けるものである。As mentioned above, the separating device arranged downstream of the coarse-graining filter may be a device conventionally used for separating and removing droplets or normal mist, but it is separated from gas. It is preferable to provide a liquid film trap so that the coarse-grained mist and droplets do not flow out to the outlet pipe side. That is, the coarse mist and droplets separated from the gas in the separation device remain as a liquid film on the inner wall of the separation device, but, for example, the outlet pipe is projected into the separation device so that this liquid film does not flow out to the outlet pipe side. A liquid film trap having a different structure is provided.
【００２９】[0029]
【実施例】実施例１ オイルミストの分離除去に従来から使用されてる下記３
種類の分離装置、即ち図２に示すサイクロン分離装置
５、図３に示す重力沈降分離装置６、及び図４に示すイ
ンパクタ分離装置７を用意し、その気体流入用の入口パ
イプ８に本発明の粗粒化フィルター１０を挿着すること
により、オイルミストの捕集効率と圧力損失を測定し
た。EXAMPLES Example 1 The following 3 which are conventionally used for separating and removing oil mist:
A type of separation device, that is, a cyclone separation device 5 shown in FIG. 2, a gravity settling separation device 6 shown in FIG. 3, and an impactor separation device 7 shown in FIG. 4 are prepared, and an inlet pipe 8 for gas inflow of the present invention is provided. By inserting the coarse particle filter 10, the collection efficiency of oil mist and the pressure loss were measured.
【００３０】図２に示すサイクロン分離装置５は、円筒
状上部と逆円錐状下部からなる本体５ａの高さが７０ｍ
ｍ及び本体５ａの円筒状上部の直径が４５ｍｍであり、
本体５ａの接線方向に設けた入口パイプ８及び本体５ａ
の上部に垂直方向に設けた出口パイプ９の内径が共に１
５ｍｍであって、出口パイプ９は本体５ａの内部に長さ
１６ｍｍだけ突き出すことにより液膜トラップを構成し
ている。The cyclone separator 5 shown in FIG. 2 has a main body 5a consisting of a cylindrical upper part and an inverted conical lower part with a height of 70 m.
m and the diameter of the cylindrical upper part of the main body 5a is 45 mm,
Inlet pipe 8 and main body 5a provided in the tangential direction of the main body 5a
Both of the inner diameters of the outlet pipes 9 installed vertically in the upper part of the
It is 5 mm, and the outlet pipe 9 constitutes a liquid film trap by projecting a length of 16 mm inside the main body 5a.
【００３１】図３の重力沈降分離装置６は、円筒状の沈
降室６ａの直径が６０ｍｍ及び長さが５４ｍｍであり、
円筒状の沈降室６ａの軸中心に沿い対向する位置に内径
が共に１０ｍｍの入口パイプ８と出口パイプ９が設けて
あり、出口パイプ９は沈降室６ａの内部に５ｍｍだけ突
き出すことにより液膜トラップを構成している。又、図
４のインパクタ分離装置７は、円筒状の本体７ａの直径
が３０ｍｍ及び長さが３０ｍｍであり、入口パイプ８と
出口パイプ９の寸法や構成は図３の装置と同じであっ
て、円筒状の本体７ａの内部にその軸方向に直角に３枚
の邪魔板７ｂがジグザクに等間隔に配置してある。The gravity sedimentation separation device 6 of FIG. 3 has a cylindrical sedimentation chamber 6a having a diameter of 60 mm and a length of 54 mm.
An inlet pipe 8 and an outlet pipe 9 each having an inner diameter of 10 mm are provided at positions facing each other along the axial center of the cylindrical settling chamber 6a, and the outlet pipe 9 projects into the settling chamber 6a by 5 mm to form a liquid film trap. Are configured. The impactor separation device 7 of FIG. 4 has a cylindrical main body 7a having a diameter of 30 mm and a length of 30 mm, and the inlet pipe 8 and the outlet pipe 9 have the same size and configuration as the device of FIG. Inside the cylindrical main body 7a, three baffle plates 7b are arranged at equal intervals in a zigzag manner at right angles to the axial direction.
【００３２】これらの各分離装置５、６、７の各入口パ
イプ８に挿着した粗粒化フィルター１０は、次の３種類
である： 粗粒化フィルター：直径８μｍのステンレス単繊維を
撚った直径１５０μｍの複数の繊維糸を、一平面上で長
さ方向に平行に且つ１ｍｍの間隔で配列して両端を枠体
に固定したすだれ状繊維層からなり、すだれ状繊維層を
気体の流れ方向に対して直角に２５層（厚さ２０ｍｍ）
配置した粗粒化フィルター。There are the following three types of coarse-grained filters 10 inserted into the respective inlet pipes 8 of the respective separating devices 5, 6, and 7: coarse-grained filter: stainless single fiber having a diameter of 8 μm is twisted. A plurality of fiber yarns having a diameter of 150 μm are arranged in parallel on the same plane in the length direction at intervals of 1 mm, and both ends are fixed to the frame body. 25 layers (20 mm thick) perpendicular to the direction
Arranged coarse-grained filter.
【００３３】粗粒化フィルター：図１に示すように、
直径６０μｍの複数のナイロンの繊維糸１を、一平面上
で長さ方向に平行に且つ１ｍｍの間隔で配列し、各繊維
糸１に対して直角方向に配列した直径３９μｍのナイロ
ンの繊維糸からなる糸状支持材２により各繊維糸を固定
し且つ繊維糸１の両端を解放したすだれ状繊維層からな
り、２つのすだれ状繊維層を糸状支持材２が５０μｍの
間隔をおいて平行し且つ繊維糸１が重ならないように一
平面上に配置して枠体３に固定したものを、気体の流れ
方向に対して直角に２層配置（間隔１ｍｍ）した粗粒化
フィルター。Coarse-grained filter: As shown in FIG.
A plurality of nylon fiber threads 60 having a diameter of 60 μm are arranged parallel to each other on a plane in the longitudinal direction at an interval of 1 mm, and are arranged in a direction perpendicular to each fiber thread 1. Each of the fiber yarns is fixed by the thread-like support material 2 and the both ends of the fiber thread 1 are opened, and the two interdigital fiber layers are parallel to each other with the thread-like support material 2 spaced at a distance of 50 μm. A coarse-grained filter in which the yarns 1 arranged on one plane so as not to overlap and fixed to the frame 3 are arranged in two layers (interval 1 mm) at right angles to the gas flow direction.
【００３４】粗粒化フィルター：直径６０μｍのナイ
ロンの複数の繊維糸を、一平面上で長さ方向に平行に且
つ１.６μｍの間隔で配列して両端を枠体に固定し、各
繊維糸に対して直角方向に１０μｍの間隔で配列した直
径３９μｍの３本のナイロンの繊維糸からなる糸状支持
材により各繊維糸を固定したすだれ状繊維層からなり、
すだれ状繊維層を気体の流れ方向に対して直角に１層だ
け配置した粗粒化フィルター。Coarse-grained filter: A plurality of nylon fiber threads having a diameter of 60 μm are arranged in parallel on the same plane in the longitudinal direction at intervals of 1.6 μm, and both ends are fixed to a frame body. A interdigital fiber layer in which each fiber thread is fixed by a thread-like support material composed of three nylon fiber threads having a diameter of 39 μm arranged at an interval of 10 μm in a direction perpendicular to
A coarse-grained filter in which only one layer of the interdigital fiber layer is arranged at right angles to the gas flow direction.
【００３５】又、比較例として、上記本発明の粗粒化フ
ィルターの代わりに、直径３５μｍのナイロンの繊維糸
を縦糸と横糸とし、縦糸及び横糸の間隔４０μｍで織り
上げた織物を３枚重ねたもの、及びポリエチレンとポリ
プロピレンからなり、空隙率９５％で厚さ１０ｍｍの不
織布を、それぞれ各分離装置の入口パイプに上記と同様
に挿着し、オイルミストの捕集効率と圧力損失を同様に
測定した。As a comparative example, instead of the coarse-grained filter of the present invention, a nylon fiber thread having a diameter of 35 μm was used as warp and weft, and three woven fabrics were woven at a warp and weft spacing of 40 μm. , And a non-woven fabric composed of polyethylene and polypropylene and having a porosity of 95% and a thickness of 10 mm were inserted into the inlet pipes of the respective separators in the same manner as above, and the oil mist collection efficiency and pressure loss were measured in the same manner. .
【００３６】上記の各粗粒化フィルター及び比較例のフ
ィルターを挿着した分離装置を用いて、オイルミスト発
生装置で発生させた平均粒径１.４５μｍのオイルミス
トを含む気体を４５リットル／分の流量で流し、各分離
装置での捕集効率並びに圧力損失を測定した結果を表１
に示した。尚、参考のために、粗粒化フィルター又は比
較例のフィルターを挿着しない分離装置における捕集効
率及び圧力損失も測定し、表１に併せて示した。A gas containing oil mist having an average particle size of 1.45 μm generated by an oil mist generator was used at 45 liters / minute by using each of the above-mentioned coarse-grained filters and a separator equipped with a filter of a comparative example. Table 1 shows the results of measuring the collection efficiency and pressure loss in each separation device at the flow rate of
It was shown to. For reference, the collection efficiency and the pressure loss in a separation device in which the coarse-grained filter or the filter of the comparative example was not inserted were also measured and are also shown in Table 1.
【００３７】[0037]
【表１】 [Table 1]
【００３８】上記の結果から、本発明の粗粒化フィルタ
ーを備えた分離装置では、粗粒化フィルターなしの分離
装置に比べてオイルミストの捕集効率が格段に向上し、
圧力損失も低く抑えることができるのに対して、通常の
織物や不織布をもちいた場合には捕集効率の向上は認め
られるものの、圧力損失の増加が極めて大きいことが分
かる。From the above results, in the separation device provided with the coarse particle filter of the present invention, the efficiency of collecting oil mist is remarkably improved as compared with the separation device without the coarse particle filter.
It can be seen that, while the pressure loss can be suppressed to a low level, when the ordinary woven fabric or non-woven fabric is used, the collection efficiency is improved, but the pressure loss is significantly increased.
【００３９】実施例２ 前記実施例１のサイクロン分離装置と粗粒化フィルター
を使用し、平均粒径の異なるオイルミストを捕集した
場合の捕集効率を測定した。その結果を表２に示した。 Example 2 Using the cyclone separator of Example 1 and the coarse-grained filter, the collection efficiency when oil mists having different average particle sizes were collected was measured. The results are shown in Table 2.
【００４０】[0040]
【表２】 [Table 2]
【００４１】上記の結果から、従来オイルミストの分離
に有効とされているサイクロン分離装置であっても、オ
イルミストの平均粒径が１μｍより小さくなると捕集効
率が急激に低下することが分かる。これに対して、本発
明の粗粒化フィルターを備えたサイクロン分離装置を使
用することによって、平均粒径が１μｍ以下の微細なオ
イルミストも高い捕集効率で分離除去できることが分か
る。From the above results, it can be seen that even with a cyclone separator which has been conventionally effective for separating oil mist, the collection efficiency drops sharply when the average particle size of oil mist becomes smaller than 1 μm. On the other hand, by using the cyclone separation device equipped with the coarse-grained filter of the present invention, it can be seen that fine oil mist having an average particle size of 1 μm or less can be separated and removed with high collection efficiency.
【００４２】[0042]
【発明の効果】本発明の粗粒化フィルターを備えたミス
ト除去装置によれば、内燃機関におけるブローバイガス
中のオイルミストのような気体中に含まれるミスト、特
に粒径が１μｍ以下の微細なミストを、小さな圧力損失
でありながら、高い効率で捕集して分離除去することが
できる。According to the mist removing device provided with the coarse-grained filter of the present invention, mist contained in gas such as oil mist in blow-by gas in an internal combustion engine, especially fine particles having a particle size of 1 μm or less. The mist can be collected and separated and removed with high efficiency with a small pressure loss.
【００４３】しかも、粗粒化フィルターは小型化且つ軽
量化が可能であり、従来のミスト分離装置の入口側に簡
単に挿着できるため、コンパクトで低価格なミスト除去
装置を提供することができる。Moreover, the coarse-grained filter can be made smaller and lighter, and can be easily attached to the inlet side of the conventional mist separating device, so that a compact and low-cost mist removing device can be provided. .
【図１】本発明に係わる粗粒化フィルターの一具体例を
説明的に示す概略の正面図である。FIG. 1 is a schematic front view illustratively showing a specific example of a coarse-graining filter according to the present invention.
【図２】サイクロン分離装置に粗粒化フィルターを備え
た本発明のミスト除去装置を示す概略の断面図である。FIG. 2 is a schematic cross-sectional view showing a mist removing device of the present invention in which a cyclone separating device is provided with a coarse graining filter.
【図３】重力沈降分離装置に粗粒化フィルターを備えた
本発明のミスト除去装置を示す概略の断面図である。FIG. 3 is a schematic cross-sectional view showing a mist removing device of the present invention in which a gravity sedimentation separation device is provided with a coarse particle filter.
【図４】インパクタ分離装置に粗粒化フィルターを備え
た本発明のミスト除去装置を示す概略の断面図である。FIG. 4 is a schematic cross-sectional view showing a mist removing device of the present invention in which an impactor separating device is provided with a coarse graining filter.
１ 繊維糸 ２ 糸状支持材 ３ 枠体 ５ サイクロン分離装置 ６ 重力沈降分離装置 ７ インパクタ分離装置 ８ 入口パイプ ９ 出口パイプ １０ 粗粒化フィルター 1 Fiber Yarn 2 Filiform Support Material 3 Frame 5 Cyclone Separation Device 6 Gravity Sedimentation Separation Device 7 Impactor Separation Device 8 Inlet Pipe 9 Outlet Pipe 10 Coarse Particle Filter
Claims (8)
おいて配列した複数の単繊維又は繊維糸からなり、気体
中のミストを捕集して粗粒化し、粗粒ミストないし液滴
として気体中に再飛散させる粗粒化フィルターと、粗粒
化フィルターから再飛散した粗粒ミストないし液滴を気
体から分離する分離装置とを備えたことを特徴とするミ
スト除去装置。1. A plurality of single fibers or fiber yarns arranged substantially parallel to each other in a longitudinal direction and spaced apart from each other, and collects mist in a gas to make coarse particles, thereby forming coarse mist or droplets. A mist removing device comprising: a coarse-grained filter for re-scattering in a gas; and a separation device for separating coarse-grained mist or droplets re-scattered from the coarse-grained filter from a gas.
維糸が、一平面上で長さ方向に平行に且つ互いに間隔を
おいてすだれ状に配列し、このすだれ状繊維層が気体の
流れ方向に対してほぼ直角に少なくとも１層配置されて
いることを特徴とする、請求項１に記載のミスト除去装
置。2. A plurality of single fibers or fiber threads of a coarse-grained filter are arranged in a comb shape in a plane parallel to the length direction and at intervals from each other, and the comb-shaped fiber layer forms a gas flow. The mist removing device according to claim 1, wherein at least one layer is arranged substantially at right angles to the direction.
れ状繊維層の単繊維又は繊維糸の太さを、気体の流れ方
向の上流及び下流のすだれ状繊維層が中間部のすだれ状
繊維層より太くなるように傾斜させたことを特徴とす
る、請求項２に記載のミスト除去装置。3. A plurality of interdigital fiber layers, wherein each interdigital fiber layer has a thickness of a single fiber or a fiber yarn, and the interdigital fiber layers of the interdigital fiber layers upstream and downstream in the gas flow direction are intermediate fibers. The mist removing device according to claim 2, wherein the mist removing device is inclined so as to be thicker than the fiber layer.
繊維又は繊維糸が、夫々その両端で固定されているか、
又は各単繊維又は繊維糸に対してほぼ直角方向に配列し
た単繊維又は繊維糸からなる糸状支持材により固定され
且つ両端が解放されていることを特徴とする、請求項２
又は３に記載のミスト除去装置。4. A plurality of monofilaments or fiber threads arranged in a comb shape on one plane are fixed at both ends, respectively,
Or fixed by a thread-like support material composed of monofilaments or fiber threads arranged in a direction substantially perpendicular to each monofilament or fiber thread and having both ends open.
Or the mist removing device described in 3.
繊維又は繊維糸が、交互に高弾性繊維と低弾性繊維とで
構成されていることを特徴とする、請求項２〜４のいず
れかに記載のミスト除去装置。5. A plurality of single fibers or fiber yarns arranged in a comb shape on one plane are composed of high elastic fibers and low elastic fibers alternately. The mist removing device according to any one of claims.
繊維又は繊維糸が、交互に太い単繊維又は繊維糸と細い
単繊維又は繊維糸とで構成されていることを特徴とす
る、請求項２、４又５のいずれかに記載のミスト除去装
置。6. A plurality of monofilaments or fiber yarns arranged in a comb shape on a single plane are alternately composed of thick monofilaments or fiber yarns and thin monofilaments or fiber yarns, The mist removing device according to claim 2, 4, or 5.
繊維糸が、天然繊維、再生繊維、半合成繊維、有機合成
繊維、又は無機合成繊維からなることを特徴とする、請
求項１〜６のいずれかに記載のミスト除去装置。7. The single fiber or the fiber thread constituting the coarse-grained filter is made of natural fiber, regenerated fiber, semi-synthetic fiber, organic synthetic fiber or inorganic synthetic fiber. The mist removing device according to any one of 1.
力分離装置、慣性力を利用した慣性分離装置、遠心力を
利用したサイクロン分離装置のいずれかであることを特
徴とする、請求項１〜７のいずれか記載のミスト除去装
置。8. The separation device is any one of a gravity separation device using natural sedimentation, an inertial separation device using inertial force, and a cyclone separation device using centrifugal force. The mist removing device according to any one of to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25127994A JPH0893438A (en) | 1994-09-20 | 1994-09-20 | Mist eliminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25127994A JPH0893438A (en) | 1994-09-20 | 1994-09-20 | Mist eliminating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0893438A true JPH0893438A (en) | 1996-04-09 |
Family
ID=17220441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25127994A Pending JPH0893438A (en) | 1994-09-20 | 1994-09-20 | Mist eliminating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0893438A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10103039A (en) * | 1996-05-31 | 1998-04-21 | Pall Corp | Purifier employed in bleeder circuit for endothermic engine block and bleeder circuit provided with the same purifier |
| JP2007503545A (en) * | 2003-08-25 | 2007-02-22 | エフ・エー・フアウ・モトーレンテヒニック・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング | Crank chamber ventilation device in internal combustion engine |
| EP1902767A1 (en) * | 2006-09-22 | 2008-03-26 | ISI-Industrie-Produkte GmbH | Method and device for the separation of liquids from a gas stream |
| JP2016131969A (en) * | 2015-01-22 | 2016-07-25 | 三菱重工業株式会社 | Exhaust gas treatment system and method |
| CN111558256A (en) * | 2020-05-20 | 2020-08-21 | 中国石油大学(华东) | Superfine particle separation system under coupling mechanism |
-
1994
- 1994-09-20 JP JP25127994A patent/JPH0893438A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10103039A (en) * | 1996-05-31 | 1998-04-21 | Pall Corp | Purifier employed in bleeder circuit for endothermic engine block and bleeder circuit provided with the same purifier |
| JP2007503545A (en) * | 2003-08-25 | 2007-02-22 | エフ・エー・フアウ・モトーレンテヒニック・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング | Crank chamber ventilation device in internal combustion engine |
| EP1902767A1 (en) * | 2006-09-22 | 2008-03-26 | ISI-Industrie-Produkte GmbH | Method and device for the separation of liquids from a gas stream |
| JP2016131969A (en) * | 2015-01-22 | 2016-07-25 | 三菱重工業株式会社 | Exhaust gas treatment system and method |
| WO2016117172A1 (en) * | 2015-01-22 | 2016-07-28 | 三菱重工業株式会社 | Exhaust gas treatment system and method |
| US10328383B2 (en) | 2015-01-22 | 2019-06-25 | Mitsubishi Heavy Industries Engineering, Ltd. | Flue gas treatment system and method |
| US10610820B2 (en) | 2015-01-22 | 2020-04-07 | Mitsubishi Heavy Industries Engineering, Ltd. | Flue gas treatment system and method |
| CN111558256A (en) * | 2020-05-20 | 2020-08-21 | 中国石油大学(华东) | Superfine particle separation system under coupling mechanism |
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