JP3989039B2

JP3989039B2 - Dust removal device

Info

Publication number: JP3989039B2
Application number: JP10408796A
Authority: JP
Inventors: 尚山下; 信義中山; 洋文山崎
Original assignee: Kawasaki Jukogyo KK
Current assignee: Kawasaki Motors Ltd
Priority date: 1996-03-29
Filing date: 1996-03-29
Publication date: 2007-10-10
Anticipated expiration: 2016-03-29
Also published as: JPH09268911A

Description

【０００１】
【発明の属する技術分野】
本発明は、ディーゼル機関等から排出される排ガス中に含まれるばいじんを除去する装置、詳しくは、粒状ろ過材の充填層でばいじんを捕集しながら粒状ろ過材の再生を行う装置において、焼却時の熱応力を緩和することができ、また、圧力損失を小さくすることができるばいじん除去装置に関するものである。
【０００２】
【従来の技術】
従来から、ディーゼル機関、例えば、船舶用ディーゼル機関からの排ガス中に含まれるばいじん（パティキュレート）を除去する際には、排ガスを粒状ろ過材層に通しながらばいじんを捕集し、捕集したばいじんを焼却してろ過材を再生する、いわゆるグラニュラ（ｇｒａｎｕｌａｒ）方式のばいじん除去装置が用いられている。
特開平４−３４７３１４号公報には、ディーゼル機関の排気導管と過給機との間の排気集合管内に設けられた、２枚の多孔支持体を対設して回転可能に形成された円盤状体と、この円盤状態内に粒子を充填して形成された粒子充填層と、この粒子充填層に近接して設けられた再生用ガス導管とからなるグラニュラ方式の排ガス浄化装置で、ばいじん（ダスト）の捕集と、捕集されたばいじんの焼却とを１つの粒子充填層で行うようにした技術が開示されている。
【０００３】
また、特開平６−３１７１３８号公報には、複数のフィルターエレメントに仕切られた円筒形の粒状ろ過材層を有するばいじん捕集ホルダーを間欠回転させて、このホルダーの外方向から内方向に含じん排ガスを流過させて集じんし、ばいじん捕集ホルダーの外周部に配置された焼却部シール部材から加熱された焼却用ガスを集じん済みのフィルターエレメントに供給して粒状ろ過材を再生するようにしたグラニュラ方式のばいじん除去装置が開示されている。
【０００４】
これらの公報記載の技術を含めた従来技術を図９及び図１０に基いて説明する。図９はグラニュラ式のばいじん除去装置の立断面の概略を示し、図１０は同装置のＡ−Ａ線断面の概略を示している。１０は円筒形の排ガス管で、この排ガス管１０内にこの排ガス管と同軸に間欠回転可能な円筒形のばいじん捕集ホルダー１２が配設されている。このばいじん捕集ホルダー１２は円筒形の通気性支持板１４、１６からなる二重筒を有し、この二重筒の間に粒状ろ過材（グラニュラ）１８が充填されてフィルター（ろ過材層）２０が形成されている。
このフィルター２０内には軸方向の複数の仕切板２２が放射状に設けられて、複数のフィルターエレメントが形成されている。また、ばいじん捕集ホルダー１２の外周部には、加熱された空気等の焼却用ガスを導入してフィルターエレメントのばいじんを焼却してろ過材を再生するための焼却部シール部材２４が設けられている。この焼却部シール部材２４には焼却用ガス供給管２６が連結されている。２８はヒーター、３０は遮蔽端板、３２は回転軸、３４はモーターである。
【０００５】
【発明が解決しようとする課題】
上記公報記載の従来のばいじん除去装置においては、捕集部の構造は何も限定されていない。また、特開平４−２６７９１３号公報には、セラミックフィルター式のばいじん除去装置が記載されているが、この場合のフィルターエレメントの保持方法では、グラニュラ式への適用は困難である。
従来、ホルダーの金網を溶接で固定する方式も知られているが、ホルダー部は６００〜７００℃の高温の焼却用ガスにさらされるため、熱応力が大きく、溶接部が損傷し金網がほつれたりするという問題がある。
また、グラニュラ式のばいじん除去装置の場合、排ガス流入の上流側に片寄ってばいじんが付着し、圧力損失が大きくなるという問題がある。
【０００６】
本発明は上記の諸点に鑑みなされたもので、その目的は、ばいじん捕集ホルダーの金網をパンチングメタルで保護し、これをボルト付の押え部材で支持・固定することにより、焼却・再生時のホルダーの熱応力を緩和するようにしたばいじん除去装置を提供することにある。
また、本発明の他の目的は、金網を複数枚重ねたり、粒状ろ過材の粒径を上流側を大きくし、これを金網で区切ったりすることにより、ガスの拡がりを良好にして圧力損失を小さくし、また、ばいじんを均等に捕集するようにしたばいじん除去装置を提供することにある。
【０００７】
【課題を解決するための手段】
上記の目的を達成するために、本発明のばいじん除去装置は、円筒形の排ガス管内に間欠回転可能な円筒形のばいじん捕集ホルダーが配設され、
このばいじん捕集ホルダーは円筒形の通気性支持板からなる二重筒を有し、該二重筒の間に粒状ろ過材が充填されてフィルターが形成されており、
このフィルター内には軸方向の複数の仕切板が放射状に設けられて複数のフィルターエレメントが形成されており、
ばいじん捕集ホルダーの外周部に、加熱された焼却用ガスを導入してフィルターエレメントのばいじんを焼却してろ過材を再生するための焼却用ガス供給管に接続された焼却部シール部材が設けられたばいじん除去装置において、
円筒形の通気性支持板からなる二重筒が、金網と該金網の外側に接触して設けられたパンチングメタルとで形成され、該パンチングメタルを押え部材でボルトを介してばいじん捕集ホルダーに固定して構成されている（図１及び図２参照）。
なお、排ガス管の長手方向の中心軸と、間欠回転可能なばいじん捕集ホルダーの中心軸とは一致する場合もあり、偏心する場合もある。
【０００８】
また、本発明のばいじん除去装置は、円筒形の排ガス管内に間欠回転可能な円筒形のばいじん捕集ホルダーが配設され、
このばいじん捕集ホルダーは円筒形の通気性支持板からなる二重筒を有し、該二重筒の間に粒状ろ過材が充填されてフィルターが形成されており、
このフィルター内には軸方向の複数の仕切板が放射状に設けられて複数のフィルターエレメントが形成されており、
ばいじん捕集ホルダーの外周部に、加熱された焼却用ガスを導入してフィルターエレメントのばいじんを焼却してろ過材を再生するための焼却用ガス供給管に接続された焼却部シール部材が設けられたばいじん除去装置において、
円筒形の通気性支持板からなる二重筒が、金網と該金網の外側に接触して設けられたパンチングメタルとで形成され、少なくともガスの入口側の金網が、複数枚重ねられた金網であることを特徴としている（図３〜図５参照）。
【０００９】
また、本発明のばいじん除去装置は、円筒形の排ガス管内に間欠回転可能な円筒形のばいじん捕集ホルダーが配設され、
このばいじん捕集ホルダーは円筒形の通気性支持板からなる二重筒を有し、該二重筒の間に粒状ろ過材が充填されてフィルターが形成されており、
このフィルター内には軸方向の複数の仕切板が放射状に設けられて複数のフィルターエレメントが形成されており、
ばいじん捕集ホルダーの外周部に、加熱された焼却用ガスを導入してフィルターエレメントのばいじんを焼却してろ過材を再生するための焼却用ガス供給管に接続された焼却部シール部材が設けられたばいじん除去装置において、
フィルター内を円筒形の仕切金網で複数の区画に分割し、ガス流れの上流側区画に充填された粒状ろ過材の径が、ガス流れの下流側区画に充填された粒状ろ過材の径より大きくなるようにしたことを特徴としている（図６〜図８参照）。
このばいじん除去装置（図６〜図８）において、円筒形の通気性支持板からなる二重筒を、金網と該金網の外側に接触して設けられたパンチングメタルとで形成することが好ましい。また、円筒形の通気性支持板からなる二重筒を、金網と該金網の外側に接触して設けられたパンチングメタルとで形成し、さらに、少なくともガスの入口側の金網を、複数枚重ねられた金網とすることが好ましい。
【００１０】
これらのばいじん除去装置において、パンチングメタルを押え部材でボルトを介してばいじん捕集ホルダーに固定するように構成することが好ましい（図５、図８参照）。また、パンチングメタルと押え部材との間に、相対すべりを良くするためのすべり板を挿入して設けることが好ましい（図１、図２、図５、図８参照）。排ガス管として、例えば、ディーゼル機関の排気管が適用される。この場合、ディーゼル機関と過給機との間の排気管とすることが好ましいが、過給機の下流の排気管とすることも可能である。
【００１１】
【発明の実施の形態】
図１及び図２は、本発明の実施の第１形態によるばいじん除去装置の要部の概略構成を示す。本実施形態は、円筒形の通気性支持板からなる二重筒が、金網４０とこの金網４０の外側に接触して設けられたパンチングメタル４２とで形成され、このパンチングメタル４２を押え部材４４、４６でボルト４８、５０、５２を介してばいじん捕集ホルダー１２に固定したものである。１８は粒状ろ過材、２０はフィルター（ろ過材層）である。
また、パンチングメタル４２と押え部材４４との間に、相対すべりを良くするためのすべり板５４が挿入されている。このすべり板５４は、押え部材４４及びばいじん捕集ホルダー１２の材質と異なる材質を用いることが好ましい。このようにすれば、相対すべりを一層良好にすることができる。
【００１２】
焼却用ガスとしては、一般的には空気が用いられるが、酸素濃度が高い（例えば約１２％以上）排ガス等を用いることもできる。また、空気や排ガスに酸素を混合させたガスを用いることもできる。
焼却用ガスはヒーターで６００〜７００℃に加熱されて焼却部シール部材に導入され、図２に示すように、既にばいじんを捕集したフィルターエレメントに捕捉されているばいじんを燃焼・焼却してろ過材１８を再生する。ろ過材１８が再生されると、ホルダー１２はフィルターエレメント１個分だけ間欠回転して、図１に示すようにばいじん除去工程が行われる。ろ過材としては、例えば、直径約１mmのシリカーアルミナ系のムライトボール等が用いられる。
パンチングメタル４２は、高温の焼却用ガスによって熱膨張するので、ボルト締めや溶接固定では、熱応力によりボルトや溶接箇所が損傷したり切断したりして金網がほつれたり、熱変形により金網が抜けたりする。また、損傷により金網の交換ができないという問題が生じる。
また、溶接では金網の押えが少なく金網がづれるという問題があり、ボルト締めの場合は、金網を切断することになり、この部分からほつれてくる。このため、本実施形態におけるように、押え部材で伸びを吸収するように構成する。また、相対すべりを良くするために、パンチングメタルと押え部材との間にすべり板を入れている。
【００１３】
図３〜図５は、本発明の実施の第２、３、４形態を示す。本実施形態は、円筒形の通気性支持板からなる二重筒が、金網４０とこの金網４０の外側に接触して設けられたパンチングメタル４２とで形成され、図３に示す実施の第２形態のように、ガス入口側の金網４０を、複数枚重ねられた金網４０で形成したものである。図３は一例として、３枚の金網４０を重ね合わせた場合を示している。金網を複数枚重ねることにより、パンチングメタル４２の孔を通った排ガス又は焼却用ガスの広がりが良好になり、圧力損失も少なくなる。
また、図４に示す実施の第３形態のように、ガス出口側の金網をも複数枚重ねる場合もある。また、図５に示す実施の第４形態のように、パンチングメタル４２を押え部材４４、４６でボルト４８、５０、５２を介してばいじん捕集ホルダー１２に固定する場合もある。さらに、パンチングメタル４２と押え部材４４との間に、相対すべりを良くするためのすべり板５４を挿入して設ける場合もある。他の構成及び作用は、図１及び図２に示す実施の第１形態の場合と同様である。
【００１４】
図６〜図８は、本発明の実施の第５、６、７形態を示す。本実施形態は、フィルター内を円筒形の仕切金網６０で複数の区画に分割し、ガス流れの上流側区画に充填された粒状ろ過材６２の径が、ガス流れの下流側区画に充填された粒状ろ過材６４の径より大きくなるように構成したものである。
図６に示す実施の第５形態は、一例として、フィルターを中間の仕切金網６０で２区画に分割し、ガス流れの上流側に例えば粒径２〜５mm程度の大径の粒状ろ過材６２を充填し、ガス流れの下流側に粒径１mm程度の小径の粒状ろ過材６４を充填した構成を示している。ばいじんは入口部に堆積しやすいので、本実施形態では、ばいじんを均等に捕集することができ、かつ、圧力損失も小さくなる。なお、区画の数は３以上とすることも可能であり、各区画の厚みの比及び粒状ろ過材の大きさは、任意に変更することができる。また、本実施態様においても、金網４０とパンチングメタル４２を用いることが好ましい。
図７に示す実施の第６形態は、ガス入口側の金網４０を複数枚重ねる場合を示し、図８に示す実施の第７形態は、押え部材４４、４６、すべり板５４を用いる場合を示している。他の構成及び作用は、図１及び図２に示す実施の第１形態の場合と同様である。
【００１５】
【発明の効果】
本発明は上記のように構成されているので、つぎのような効果を奏する。
（１）通気性支持板を金網とこの金網を保護するパンチングメタルとで構成し、このパンチングメタルをボルト付の押え部材でばいじん捕集ホルダーに支持・固定しているので、ばいじん捕集ホルダーの焼却・再生時の熱応力を緩和することができ、伸びを吸収して金網及びパンチングメタル取付部の損傷を防止することができる。さらに、パンチングメタルと押え部材との間にすべり板を挿入して設けているので、相対すべりをさらに良くして、上記の効果を一層確実に奏することができる。
（２）通気性支持板としての金網を複数枚重ねる場合は、フィルターに導入されるガスの拡がりが良好になり、圧力損失を小さくすることができる。
（３）粒状ろ過材の径をガス流れの上流側を大きくするようにフィルター内を金網で区切る場合は、フィルター入口部に片寄ってばいじんが付着することを回避して、ばいじんを均等に捕集することができ、除じん効率の向上及び圧力損失の低減を図ることができる。
【図面の簡単な説明】
【図１】本発明の実施の第１形態によるばいじん除去装置の要部の概略断面図で、ばいじん捕集時の状態を示している。
【図２】図１に示す状態から焼却・再生時に切り換わった状態を示す概略断面図である。
【図３】本発明の実施の第２形態を示す概略断面図である。
【図４】本発明の実施の第３形態を示す概略断面図である。
【図５】本発明の実施の第４形態を示す概略断面図である。
【図６】本発明の実施の第５形態を示す概略断面図である。
【図７】本発明の実施の第６形態を示す概略断面図である。
【図８】本発明の実施の第７形態を示す概略断面図である。
【図９】従来のグラニュラ式のばいじん除去装置を示す縦断面図である。
【図１０】図９に示すばいじん除去装置のＡ−Ａ線断面説明図である。
【符号の説明】
１０排ガス管
１２ばいじん捕集ホルダー
１４、１６通気性支持板
１８粒状ろ過材
２０フィルター（ろ過材層）
２２仕切板
２４焼却部シール部材
２６焼却用ガス供給管
２８ヒーター
３０遮蔽端板
３２回転軸
３４モーター
４０金網
４２パンチングメタル
４４、４６押え部材
４８、５０、５２ボルト
５４すべり板
６０仕切金網
６２大径の粒状ろ過材
６４小径の粒状ろ過材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for removing dust contained in exhaust gas discharged from a diesel engine or the like, and more specifically, an apparatus for regenerating a granular filter medium while collecting the dust in a packed bed of the granular filter medium. The present invention relates to a dust removing device that can relieve the thermal stress and reduce the pressure loss.
[0002]
[Prior art]
Conventionally, when removing dust (particulates) contained in exhaust gas from a diesel engine, for example, a marine diesel engine, dust is collected by passing the exhaust gas through a particulate filter layer. A so-called granular type dust removing apparatus is used in which the filter medium is regenerated by incineration.
Japanese Patent Laid-Open No. 4-347314 discloses a disk-like shape that is rotatably formed by facing two porous supports provided in an exhaust collecting pipe between an exhaust pipe of a diesel engine and a supercharger. A granular exhaust gas purification apparatus comprising a body, a particle packed layer formed by filling particles in the disk state, and a regeneration gas conduit provided close to the particle packed layer. ) And the incineration of the collected dust are performed in one particle packed bed.
[0003]
Japanese Patent Application Laid-Open No. 6-317138 discloses that a dust collection holder having a cylindrical granular filter material layer partitioned by a plurality of filter elements is intermittently rotated so that the dust is contained from the outside to the inside. The exhaust gas is allowed to flow through to collect dust, and the incineration gas heated from the incineration part seal member located on the outer periphery of the dust collection holder is supplied to the collected filter element to regenerate the granular filter media. A granular-type dust removing apparatus is disclosed.
[0004]
Conventional techniques including those described in these publications will be described with reference to FIGS. FIG. 9 shows an outline of a vertical section of a granular type dust removing apparatus, and FIG. 10 shows an outline of a section taken along line AA of the apparatus. Reference numeral 10 denotes a cylindrical exhaust pipe, and a cylindrical dust collection holder 12 that can be intermittently rotated coaxially with the exhaust pipe is disposed in the exhaust pipe 10. The dust collection holder 12 has a double cylinder composed of cylindrical air-permeable support plates 14 and 16, and a granular filter medium (granular) 18 is filled between the double cylinders to filter (filter medium layer). 20 is formed.
A plurality of axial partition plates 22 are provided radially in the filter 20 to form a plurality of filter elements. In addition, an incinerator seal member 24 is provided on the outer periphery of the dust collection holder 12 to incinerate the dust of the filter element by introducing incineration gas such as heated air to regenerate the filter medium. Yes. An incineration gas supply pipe 26 is connected to the incineration part seal member 24. 28 is a heater, 30 is a shielding end plate, 32 is a rotating shaft, and 34 is a motor.
[0005]
[Problems to be solved by the invention]
In the conventional dust removing device described in the above publication, the structure of the collecting part is not limited. Japanese Laid-Open Patent Publication No. 4-267913 discloses a ceramic filter type dust removing device, but it is difficult to apply the filter type holding method in this case to the granular type.
Conventionally, a method of fixing a holder wire mesh by welding is also known. However, since the holder portion is exposed to a high temperature incineration gas of 600 to 700 ° C., the thermal stress is large, the weld portion is damaged, and the wire mesh is frayed. There is a problem of doing.
Further, in the case of the granular type dust removing device, there is a problem that the dust is attached to the upstream side of the exhaust gas inflow and the pressure loss increases.
[0006]
The present invention has been made in view of the above-mentioned points. The purpose of the present invention is to protect the metal net of the dust collection holder with a punching metal, and to support and fix it with a holding member with a bolt, so that it can be used during incineration / regeneration. An object of the present invention is to provide a dust removing device which can relieve the thermal stress of the holder.
Another object of the present invention is to stack a plurality of wire meshes, or to increase the particle size of the granular filter material on the upstream side and partition it with a wire mesh to improve gas spreading and reduce pressure loss. An object of the present invention is to provide a dust removing device that is small and that collects dust evenly.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the dust removing apparatus of the present invention is provided with a cylindrical dust collection holder that is intermittently rotatable in a cylindrical exhaust pipe,
This dust collection holder has a double cylinder made of a cylindrical air-permeable support plate, a filter is formed by filling a granular filter material between the double cylinders,
In this filter, a plurality of axial partition plates are provided radially to form a plurality of filter elements,
An incinerator seal member connected to an incineration gas supply pipe is provided on the outer periphery of the dust collection holder to introduce a heated incineration gas to incinerate the filter element soot and regenerate the filter medium. In the dust removal device,
A double cylinder made of a cylindrical air-permeable support plate is formed by a metal mesh and a punching metal provided in contact with the outside of the metal mesh, and the punching metal is held by a pressing member to a dust collection holder via a bolt. It is configured to be fixed (see FIGS. 1 and 2).
The central axis in the longitudinal direction of the exhaust gas pipe may coincide with the central axis of the dust collection holder capable of intermittent rotation, and may be eccentric.
[0008]
Further, the dust removing device of the present invention is provided with a cylindrical dust collection holder capable of intermittent rotation in a cylindrical exhaust pipe,
This dust collection holder has a double cylinder made of a cylindrical air-permeable support plate, a filter is formed by filling a granular filter material between the double cylinders,
In this filter, a plurality of axial partition plates are provided radially to form a plurality of filter elements,
An incinerator seal member connected to an incineration gas supply pipe is provided on the outer periphery of the dust collection holder to introduce a heated incineration gas to incinerate the filter element soot and regenerate the filter medium. In the dust removal device,
A double cylinder made of a cylindrical air-permeable support plate is formed of a metal mesh and a punching metal provided in contact with the outside of the metal mesh, and at least a plurality of metal meshes on the gas inlet side are stacked. It is characterized (see FIGS. 3 to 5).
[0009]
Further, the dust removing device of the present invention is provided with a cylindrical dust collection holder capable of intermittent rotation in a cylindrical exhaust pipe,
This dust collection holder has a double cylinder made of a cylindrical air-permeable support plate, a filter is formed by filling a granular filter material between the double cylinders,
In this filter, a plurality of axial partition plates are provided radially to form a plurality of filter elements,
An incinerator seal member connected to an incineration gas supply pipe is provided on the outer periphery of the dust collection holder to introduce a heated incineration gas to incinerate the filter element soot and regenerate the filter medium. In the dust removal device,
The inside of the filter is divided into a plurality of sections by a cylindrical partition wire mesh, and the diameter of the granular filter medium filled in the upstream section of the gas flow is larger than the diameter of the granular filter medium packed in the downstream section of the gas flow. It is characterized by the above (see FIGS. 6 to 8).
In this dust removing device (FIGS. 6 to 8), it is preferable to form a double cylinder made of a cylindrical air-permeable support plate with a metal mesh and a punching metal provided in contact with the outside of the metal mesh. In addition, a double cylinder made of a cylindrical air-permeable support plate is formed of a metal mesh and a punching metal provided in contact with the outside of the metal mesh, and a plurality of metal meshes at least on the gas inlet side are stacked. It is preferable to use a wire mesh.
[0010]
In these dust removing devices, it is preferable that the punching metal is fixed to the dust collecting holder through a bolt with a pressing member (see FIGS. 5 and 8). Further, it is preferable to provide a slip plate for improving relative slip between the punching metal and the pressing member (see FIGS. 1, 2, 5, and 8). As the exhaust gas pipe, for example, an exhaust pipe of a diesel engine is applied. In this case, an exhaust pipe between the diesel engine and the supercharger is preferable, but an exhaust pipe downstream of the supercharger can also be used.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show a schematic configuration of a main part of a dust removing apparatus according to a first embodiment of the present invention. In this embodiment, a double cylinder made of a cylindrical air-permeable support plate is formed of a metal mesh 40 and a punching metal 42 provided in contact with the outside of the metal mesh 40, and the punching metal 42 is pressed against the pressing member 44. 46 are fixed to the dust collection holder 12 via bolts 48, 50, 52. 18 is a granular filter material, 20 is a filter (filter material layer).
Further, a slip plate 54 for improving relative slip is inserted between the punching metal 42 and the pressing member 44. The sliding plate 54 is preferably made of a material different from that of the holding member 44 and the dust collecting holder 12. In this way, relative slip can be further improved.
[0012]
As the incineration gas, air is generally used, but exhaust gas having a high oxygen concentration (for example, about 12% or more) can also be used. A gas in which oxygen is mixed with air or exhaust gas can also be used.
The incineration gas is heated to 600 to 700 ° C. with a heater and introduced into the incineration part seal member. As shown in FIG. 2, the dust already captured by the filter element that has collected the dust is burned and incinerated and filtered. The material 18 is regenerated. When the filter medium 18 is regenerated, the holder 12 rotates intermittently by one filter element, and a dust removal process is performed as shown in FIG. As the filter medium, for example, a silica-alumina mullite ball having a diameter of about 1 mm is used.
Since the punching metal 42 is thermally expanded by the high-temperature incineration gas, the bolt or the welded portion is damaged or cut due to thermal stress when the bolt is tightened or welded, or the wire mesh is frayed, or the wire mesh is removed due to thermal deformation. Or Further, there arises a problem that the wire mesh cannot be replaced due to damage.
In addition, there is a problem that the wire mesh is less pressed in welding and the wire mesh is broken. In the case of bolt tightening, the wire mesh is cut and frayed from this portion. For this reason, as in the present embodiment, the presser member is configured to absorb the elongation. In order to improve relative sliding, a sliding plate is inserted between the punching metal and the pressing member.
[0013]
3 to 5 show second, third and fourth embodiments of the present invention. In this embodiment, a double cylinder made of a cylindrical air-permeable support plate is formed by a metal mesh 40 and a punching metal 42 provided in contact with the outside of the metal mesh 40, and the second embodiment shown in FIG. As in the embodiment, a plurality of metal meshes 40 on the gas inlet side are formed by overlapping metal meshes 40. FIG. 3 shows a case where three metal meshes 40 are overlapped as an example. By stacking a plurality of metal meshes, the spread of the exhaust gas or the incineration gas passing through the holes of the punching metal 42 is improved, and the pressure loss is also reduced.
Further, as in the third embodiment shown in FIG. 4, a plurality of metal meshes on the gas outlet side may be stacked. Further, as in the fourth embodiment shown in FIG. 5, the punching metal 42 may be fixed to the dust collection holder 12 by the pressing members 44, 46 through the bolts 48, 50, 52. Furthermore, a slip plate 54 for improving relative slip may be provided between the punching metal 42 and the presser member 44. Other configurations and operations are the same as those of the first embodiment shown in FIGS.
[0014]
6 to 8 show fifth, sixth and seventh embodiments of the present invention. In the present embodiment, the inside of the filter is divided into a plurality of sections by a cylindrical partition metal mesh 60, and the diameter of the granular filter material 62 filled in the upstream section of the gas flow is filled in the downstream section of the gas flow. This is configured to be larger than the diameter of the granular filter material 64.
In the fifth embodiment shown in FIG. 6, as an example, the filter is divided into two sections by an intermediate partition net 60, and a large-diameter granular filter material 62 having a particle diameter of about 2 to 5 mm is provided on the upstream side of the gas flow. A configuration is shown in which the particulate filter material 64 having a small diameter of about 1 mm is filled on the downstream side of the gas flow. Since dust is likely to accumulate at the inlet portion, in this embodiment, dust can be collected evenly and pressure loss is reduced. In addition, the number of divisions can also be made into 3 or more, and the ratio of the thickness of each division and the magnitude | size of a granular filter medium can be changed arbitrarily. Also in this embodiment, it is preferable to use the wire mesh 40 and the punching metal 42.
The sixth embodiment shown in FIG. 7 shows a case where a plurality of metal meshes 40 on the gas inlet side are stacked, and the seventh embodiment shown in FIG. 8 shows a case where holding members 44 and 46 and a sliding plate 54 are used. ing. Other configurations and operations are the same as those of the first embodiment shown in FIGS.
[0015]
【The invention's effect】
Since this invention is comprised as mentioned above, there exist the following effects.
(1) The breathable support plate is composed of a metal mesh and a punching metal that protects the metal mesh, and this punching metal is supported and fixed to the dust collection holder by a holding member with a bolt. Thermal stress during incineration / regeneration can be alleviated, and elongation can be absorbed to prevent damage to the metal mesh and punching metal attachment. Further, since the provided by inserting a sliding plate between the punching metal and the pressing member, and further improve the relative slip, the effect of the above SL can be achieved even more securely.
( 2 ) When a plurality of metal meshes as a breathable support plate are stacked, the gas introduced into the filter can be spread well and the pressure loss can be reduced.
( 3 ) When dividing the inside of the filter with a wire mesh so that the diameter of the granular filter medium is increased on the upstream side of the gas flow, it avoids the dust from adhering to the filter inlet and collects the dust evenly. It is possible to improve dust removal efficiency and reduce pressure loss.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a main part of a dust removing device according to a first embodiment of the present invention, showing a state during dust collection.
FIG. 2 is a schematic cross-sectional view showing a state switched from the state shown in FIG. 1 during incineration / regeneration.
FIG. 3 is a schematic cross-sectional view showing a second embodiment of the present invention.
FIG. 4 is a schematic cross-sectional view showing a third embodiment of the present invention.
FIG. 5 is a schematic sectional view showing a fourth embodiment of the present invention.
FIG. 6 is a schematic sectional view showing a fifth embodiment of the present invention.
FIG. 7 is a schematic sectional view showing a sixth embodiment of the present invention.
FIG. 8 is a schematic sectional view showing a seventh embodiment of the present invention.
FIG. 9 is a longitudinal sectional view showing a conventional granular dust removing apparatus.
FIG. 10 is a cross-sectional explanatory view taken along line AA of the dust removing apparatus shown in FIG. 9;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Exhaust gas pipe 12 Dust collection holders 14 and 16 Breathable support plate 18 Granular filter material 20 Filter (filter material layer)
22 partition plate 24 incinerator seal member 26 incineration gas supply pipe 28 heater 30 shielding end plate 32 rotating shaft 34 motor 40 wire mesh 42 punching metal 44, 46 holding member 48, 50, 52 bolt 54 slip plate 60 partition wire mesh 62 large diameter Granular filter medium 64 Small-diameter granular filter medium

Claims

A cylindrical dust collection holder capable of intermittent rotation is disposed in a cylindrical exhaust pipe,
This dust collection holder has a double cylinder made of a cylindrical air-permeable support plate, a filter is formed by filling a granular filter material between the double cylinders,
In this filter, a plurality of axial partition plates are provided radially to form a plurality of filter elements,
An incinerator seal member connected to an incineration gas supply pipe is provided on the outer periphery of the dust collection holder to introduce a heated incineration gas to incinerate the filter element soot and regenerate the filter medium. In the dust removal device,
A double cylinder made of a cylindrical air-permeable support plate is formed by a metal mesh and a punching metal provided in contact with the outside of the metal mesh, and the punching metal is held by a pressing member to a dust collection holder via a bolt. A dust removing device , comprising: a fixed slip plate provided between a punching metal and a pressing member to insert a slip plate for improving relative slip .

A cylindrical dust collection holder capable of intermittent rotation is disposed in a cylindrical exhaust pipe,
This dust collection holder has a double cylinder made of a cylindrical air-permeable support plate, a filter is formed by filling a granular filter material between the double cylinders,
In this filter, a plurality of axial partition plates are provided radially to form a plurality of filter elements,
An incinerator seal member connected to an incineration gas supply pipe is provided on the outer periphery of the dust collection holder to introduce a heated incineration gas to incinerate the filter element soot and regenerate the filter medium. In the dust removal device,
A double cylinder made of a cylindrical air-permeable support plate is formed of a metal mesh and a punching metal provided in contact with the outside of the metal mesh, and at least a plurality of metal meshes on the gas inlet side are stacked. Ah is, via a bolt member retainer punching metal is fixed to the dust collecting holder, between the punching metal and the pressing member, and characterized by providing by inserting a sliding plate for improving the relative sliding Soot and dust removal device.

A cylindrical dust collection holder capable of intermittent rotation is disposed in a cylindrical exhaust pipe,
This dust collection holder has a double cylinder made of a cylindrical air-permeable support plate, a filter is formed by filling a granular filter material between the double cylinders,
In this filter, a plurality of axial partition plates are provided radially to form a plurality of filter elements,
An incinerator seal member connected to an incineration gas supply pipe is provided on the outer periphery of the dust collection holder to introduce a heated incineration gas to incinerate the filter element soot and regenerate the filter medium. In the dust removal device,
The inside of the filter is divided into a plurality of sections by a cylindrical partition wire mesh, and the diameter of the granular filter medium filled in the upstream section of the gas flow is larger than the diameter of the granular filter medium packed in the downstream section of the gas flow. A double cylinder made of a cylindrical air-permeable support plate is formed by a metal mesh and a punching metal provided in contact with the outside of the metal mesh, and the punching metal is trapped by a presser member through a bolt. A dust removing device, characterized in that a slip plate for fixing relative slip is provided between a punching metal and a pressing member, which is fixed to a collecting holder .

A cylindrical dust collection holder capable of intermittent rotation is disposed in a cylindrical exhaust pipe,
This dust collection holder has a double cylinder made of a cylindrical air-permeable support plate, a filter is formed by filling a granular filter material between the double cylinders,
In this filter, a plurality of axial partition plates are provided radially to form a plurality of filter elements,
The outer peripheral portion of the dust collecting holder, provided with connected incinerated seal member incineration gas supply pipe for introducing a heated incinerated gas reproduces the filtration material by burning soot and dust filter Ereme cement In the soot and dust removal device,
The inside of the filter is divided into a plurality of sections by a cylindrical partition wire mesh, and the diameter of the granular filter medium filled in the upstream section of the gas flow is larger than the diameter of the granular filter medium packed in the downstream section of the gas flow. A double cylinder comprising a cylindrical air-permeable support plate is formed of a metal mesh and a punching metal provided in contact with the outside of the metal mesh, and at least a plurality of metal meshes on the gas inlet side are stacked. wire mesh der that is is, via a bolt member retainer punching metal is fixed to the dust collecting holder, between the punching metal and the pressing member, provided by inserting a sliding plate for improving the relative sliding A dust removing device characterized by that .

The dust removing apparatus according to any one of claims 1 to 4 , wherein the exhaust gas pipe is an exhaust pipe of a diesel engine.