JP2002349259A - Heat retaining structure for exhaust gas processing device and exhaust passage - Google Patents
Heat retaining structure for exhaust gas processing device and exhaust passageInfo
- Publication number
- JP2002349259A JP2002349259A JP2001154921A JP2001154921A JP2002349259A JP 2002349259 A JP2002349259 A JP 2002349259A JP 2001154921 A JP2001154921 A JP 2001154921A JP 2001154921 A JP2001154921 A JP 2001154921A JP 2002349259 A JP2002349259 A JP 2002349259A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- wall
- exhaust
- exhaust gas
- exhaust passage
- 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
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Thermal Insulation (AREA)
- Chimneys And Flues (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ディーゼルエンジ
ン等に使用される排ガス処理装置とこの排ガス処理装置
に至る排気通路の保温構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas treatment device used for a diesel engine or the like and a heat retaining structure for an exhaust passage leading to the exhaust gas treatment device.
【０００２】[0002]
【従来の技術】従来、車載等のディーゼルエンジン等の
エンジンから排出される排ガス中には、黒煙を主成分と
する粒子状物質（ＰＭ：パテキュレートマター）や窒素
酸化物（ＮＯｘ）等が含まれており、これらを低減する
ため、各種の排ガス処理装置が用いられている。2. Description of the Related Art Conventionally, particulate matter (PM: particulate matter) mainly composed of black smoke, nitrogen oxide (NOx) and the like are contained in exhaust gas discharged from an engine such as a diesel engine mounted on a vehicle or the like. In order to reduce these, various exhaust gas treatment devices are used.
【０００３】例えば、粒子状物質を浄化するための排ガ
ス処理装置としては、セラミックス多孔体をフィルタと
して、粒子状物質を捕捉して浄化するディーゼルパティ
キュレートフィルタ（ＤＰＦ）装置が知られており、ま
た、ＮＯｘを浄化するための排ガス処理装置としては、
セラミックスの多孔体にＮＯｘ還元触媒を担持すると共
に、還元剤となる炭化水素（ＨＣ）を排ガスに添加し
て、ＮＯｘを窒素に還元して浄化する装置等が知られて
いる。[0003] For example, as an exhaust gas treatment device for purifying particulate matter, a diesel particulate filter (DPF) device that captures and purifies particulate matter using a porous ceramic body as a filter is known. As an exhaust gas treatment device for purifying NOx,
There is known a device which carries a NOx reduction catalyst on a porous ceramic body, adds hydrocarbon (HC) as a reducing agent to exhaust gas, and reduces NOx to nitrogen to purify the exhaust gas.
【０００４】そして、近年では、粒子状物質を浄化する
排ガス処理装置においても、粒子状物質を酸化するため
の酸化触媒を担持する装置が研究開発されている。[0004] In recent years, also in an exhaust gas treatment apparatus for purifying particulate matter, an apparatus supporting an oxidation catalyst for oxidizing the particulate matter has been researched and developed.
【０００５】これらの触媒を担持した排ガス処理装置に
おいては、いずれの場合も触媒に活性温度範囲があるた
め、触媒に流入する排ガス温度を３５０℃以上にするこ
とが望ましい。In any of the exhaust gas treatment apparatuses carrying these catalysts, since the catalyst has an active temperature range in any case, it is desirable that the temperature of the exhaust gas flowing into the catalyst be 350 ° C. or higher.
【０００６】しかしながら、これらの排ガス処理装置に
流入する排ガス温度は低く、例えば、東京都内等の市街
区域を走行する場合には平均で１６０℃程度であり、エ
ンジンの作動状態によっては９０℃という低い温度にな
る場合も生じる。However, the temperature of the exhaust gas flowing into these exhaust gas treatment devices is low, for example, about 160 ° C. on average when traveling in an urban area such as Tokyo, and as low as 90 ° C. depending on the operating state of the engine. It may also occur when the temperature is reached.
【０００７】この低温の排ガスでは、排ガス処理装置の
触媒を活性化できないので、触媒を活性化するために、
エンジン側において燃料噴射を制御して、噴射する燃料
量を増加して排ガスを昇温させたり、ヒータを設けて触
媒を加熱昇温したりすることが行われている。With this low temperature exhaust gas, the catalyst of the exhaust gas treatment device cannot be activated.
2. Description of the Related Art Fuel injection is controlled on the engine side to increase the amount of fuel to be injected to increase the temperature of exhaust gas, or to provide a heater to increase the temperature of a catalyst.
【０００８】また、この排ガスの昇温や触媒の加熱と共
に、排ガスや触媒を高温状態に維持するために、排気通
路や排ガス処理装置の保温が行われている。In addition to the temperature rise of the exhaust gas and the heating of the catalyst, the exhaust passage and the exhaust gas treatment device are kept warm to maintain the exhaust gas and the catalyst in a high temperature state.
【０００９】この保温方法としては、通路にセラミック
ウール等の保温材を巻回したり、二重管構造にして、こ
の内壁と外壁の間に空気層を設けたり、輻射熱反射板を
配置して遮熱することが行われている。As a method of keeping the heat, a heat insulating material such as ceramic wool is wound around the passage, an air layer is provided between the inner wall and the outer wall in a double tube structure, or a radiant heat reflecting plate is arranged to block the heat. Heating is being done.
【００１０】[0010]
【発明が解決しようとする課題】そして、二重管内を真
空状態にすれば、対流等による伝熱を著しく減少できる
ことが知られているが、この真空状態にすることが難し
く、実用化することは困難であった。It is known that if the inside of the double tube is evacuated, heat transfer due to convection and the like can be remarkably reduced. Was difficult.
【００１１】本発明は、上記の従来技術の問題を解決す
るためになされたものであり、その目的は、ディーゼル
エンジン等に使用される排ガス処理装置とこの排ガス処
理装置に至る排気通路を、比較的簡単に保温でき、しか
も、保温能力が高く放熱による温度低下を防止できる排
ガス処理装置及び排気通路の保温構造を提供することに
ある。The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to compare an exhaust gas treatment device used in a diesel engine or the like with an exhaust passage leading to the exhaust gas treatment device. It is an object of the present invention to provide an exhaust gas treatment apparatus and a heat retaining structure for an exhaust passage, which can easily and simply keep the temperature, and can prevent the temperature from being lowered due to heat radiation with high heat retaining capacity.
【００１２】[0012]
【課題を解決するための手段】以上のような目的を達成
するための排ガス処理装置及び排気通路の保温構造は、
エンジンの排ガス処理装置と該排ガス処理装置に至る排
気通路の少なくとも一方において、外装を内壁と外壁を
有する二重構造に形成し、該二重構造の前記内壁と前記
外壁の間に、置換ガスを吸収するガス吸収剤と、輻射熱
遮蔽板とを配備し、該二重構造内の空気と置換した前記
置換ガスを前記ガス吸収剤に吸収させて該二重構造内を
真空にして形成する。To achieve the above objects, an exhaust gas treatment apparatus and a heat retaining structure for an exhaust passage are provided.
In at least one of the exhaust gas treatment device of the engine and the exhaust passage leading to the exhaust gas treatment device, the exterior is formed in a double structure having an inner wall and an outer wall, and a replacement gas is provided between the inner wall and the outer wall of the double structure. A gas absorbent to be absorbed and a radiant heat shield plate are provided, and the replacement gas, which has been replaced with air in the double structure, is absorbed by the gas absorbent to form a vacuum in the double structure.
【００１３】あるいは、エンジンの排ガス処理装置と該
排ガス処理装置に至る排気通路の少なくとも一方におい
て、外装を内壁と外壁を有する二重構造に形成し、該二
重構造の前記内壁と前記外壁の間に、空気中のガス成分
を吸収するガス吸収剤と、輻射熱遮蔽板とを配備して形
成する。[0013] Alternatively, in at least one of the exhaust gas treatment device of the engine and the exhaust passage leading to the exhaust gas treatment device, the exterior is formed in a double structure having an inner wall and an outer wall, and the exterior is formed between the inner wall and the outer wall of the double structure. In addition, a gas absorbent for absorbing gas components in the air and a radiation heat shielding plate are provided.
【００１４】また、上記の排ガス処理装置及び排気通路
の保温構造において、前記置換ガスを、水素ガス、酸素
ガス、酸化窒素ガスの少なくとも一種類のガスとする。Further, in the above exhaust gas treatment apparatus and the heat retaining structure of the exhaust passage, the replacement gas is at least one of hydrogen gas, oxygen gas and nitrogen oxide gas.
【００１５】そして、前記水素ガスのガス吸収剤とし
て、Ｌａ−Ｎｉ，Ｔｉ−Ｆｅ，Ｍｇ−Ｎｉ，Ｆｅ０．９
−Ｎｉ０．１−Ｔｉの合金の内の少なくとも一種類を用
いることができる。And, as a gas absorbent of the hydrogen gas, La-Ni, Ti-Fe, Mg-Ni, Fe0.9
At least one of -Ni0.1-Ti alloys can be used.
【００１６】また、前記酸素ガスのガス吸収剤として、
金属鉄、金属マグネシウム、金属アルミニウムの微粉末
の内の少なくとも一種類を用いることができ、前記酸化
窒素ガスのガス吸収剤として、金属バリウム、酸化バリ
ウムの内の少なくとも一種類を用いることができる。Further, as a gas absorbent for the oxygen gas,
At least one of fine powders of metallic iron, metallic magnesium, and metallic aluminum can be used, and at least one of metal barium and barium oxide can be used as a gas absorbent of the nitrogen oxide gas.
【００１７】更に、上記の排ガス処理装置及び排気通路
の保温構造において、前記二重構造の前記内壁と前記外
壁の間に、更に、金網を配備して構成する。Further, in the above-mentioned exhaust gas treatment device and the heat retaining structure of the exhaust passage, a wire mesh is further provided between the inner wall and the outer wall of the double structure.
【００１８】この排ガス処理装置及び排気通路の保温構
造によれば、二重構造内の真空により対流伝熱を減少で
き、また、輻射遮熱板により放射伝熱（輻射伝熱）を減
少できるので。優れた保温性を持つ保温構造となる。According to the exhaust gas treatment apparatus and the heat retaining structure of the exhaust passage, the convective heat transfer can be reduced by the vacuum in the double structure, and the radiant heat transfer (radiant heat transfer) can be reduced by the radiation heat shield plate. . It becomes a heat retention structure with excellent heat retention.
【００１９】そして、更に、二重構造の内の輻射遮熱板
やガス吸収剤の支持を金網を介して行うことにより、伝
導伝熱も減少できる。Further, by supporting the radiation heat shield plate and the gas absorbent in the double structure through the metal mesh, the conduction heat transfer can be reduced.
【００２０】従って、二重構造の内壁から外壁への熱伝
達を極めて小さくできるので、放熱による排ガスの温度
の低下を防止でき、エンジン運転の広い範囲で触媒活性
を得ることができるようになる。Therefore, since the heat transfer from the inner wall to the outer wall of the double structure can be extremely reduced, the temperature of the exhaust gas can be prevented from lowering due to heat radiation, and the catalytic activity can be obtained in a wide range of engine operation.
【００２１】そのため、特に、ディーゼルパティキュレ
ートフィルタ（ＤＰＦ）装置においては粒子状物質を触
媒作用により酸化除去できる運転領域が広くなり、フィ
ルタ再生のための排ガス昇温の燃料噴射制御を減少でき
るので、燃費の悪化を抑制できる。For this reason, in particular, in a diesel particulate filter (DPF) device, the operating range in which particulate matter can be oxidized and removed by a catalytic action is widened, and the fuel injection control for raising the temperature of exhaust gas for filter regeneration can be reduced. Fuel economy can be suppressed from deteriorating.
【００２２】[0022]
【発明の実施の形態】以下、図面を用いて、本発明に係
る実施の形態の排ガス処理装置及び排気通路の保温構造
について、排ガス処理装置を例にして説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an exhaust gas treatment apparatus and a heat retaining structure of an exhaust passage according to an embodiment of the present invention will be described with reference to the drawings, taking an exhaust gas treatment apparatus as an example.
【００２３】図１は本発明の排ガス処理装置の保温構造
を示す断面図であり、図２は図１の部分拡大図である。
また、図３は、排ガス処理装置の配置を示す図である。FIG. 1 is a sectional view showing a heat retaining structure of an exhaust gas treatment apparatus of the present invention, and FIG. 2 is a partially enlarged view of FIG.
FIG. 3 is a diagram showing an arrangement of the exhaust gas treatment device.
【００２４】図１及び図２に示すように、本発明の実施
の形態の排ガス処理装置及び排気通路の保温構造は、排
ガス処理装置２と排気通路３の外装を内壁１１と外壁１
２を有する二重構造にして形成する。なお、図１では排
ガス処理装置２のみを図示しているが、排気通路３の二
重構造も同じ構造である。As shown in FIGS. 1 and 2, the exhaust gas treatment apparatus and the heat retaining structure of the exhaust passage according to the embodiment of the present invention comprise the exhaust gas treatment apparatus 2 and the exterior of the exhaust passage 3 having the inner wall 11 and the outer wall 1.
2 to form a double structure. Although only the exhaust gas treatment device 2 is shown in FIG. 1, the double structure of the exhaust passage 3 has the same structure.
【００２５】そして、この二重構造の内壁１１と外壁１
２の間に、水素ガス、酸素ガス、酸化窒素ガスの少なく
とも一種類の置換ガス（吸収ガス）を吸収するガス吸収
剤２０と輻射熱遮蔽板（放射熱遮蔽板）３０とを配備す
る。Then, the inner wall 11 and the outer wall 1 of this double structure
Between them, a gas absorbent 20 for absorbing at least one type of replacement gas (absorbing gas) of hydrogen gas, oxygen gas, and nitric oxide gas and a radiant heat shield (radiant heat shield) 30 are provided.
【００２６】この二重構造の内壁１１と外壁１２は、耐
熱性ステンレスで形成し、また、輻射熱遮蔽板３０は、
ステンレス板やアルミニウム板等を用いて形成する。The inner wall 11 and the outer wall 12 of this double structure are formed of heat-resistant stainless steel.
It is formed using a stainless steel plate, an aluminum plate, or the like.
【００２７】そして、この二重構造を形成した後に、こ
の二重構造の一部に設けた図示しないガス交換部から、
二重構造の内部の空気を、ガス吸収剤２０が吸収する置
換ガスで置換し、二重構造の内部を密封する。この密封
した排ガス処理装置２を、図３に示すようにエンジンの
排気通路３に接続し所定の位置に配置する。また、必要
に応じて、この排気通路３も排ガス処理装置２の外装と
同様な二重構造とする。After forming this double structure, a gas exchange unit (not shown) provided in a part of the double structure
The air inside the double structure is replaced with a replacement gas absorbed by the gas absorbent 20, thereby sealing the inside of the double structure. The sealed exhaust gas treatment device 2 is connected to an exhaust passage 3 of an engine and is arranged at a predetermined position as shown in FIG. If necessary, the exhaust passage 3 also has a double structure similar to the exterior of the exhaust gas treatment device 2.
【００２８】この空気と置換ガス（吸収ガス）の置換工
程は、作業中に置換ガスがガス吸収剤２０に吸収されな
いように、置換ガスとガス吸収剤２０が反応を開始する
温度以下で行うことが好ましい。また、この空気と置換
ガスの置換は、排ガス処理装置２と排気通路３をエンジ
ン１の後方の所定の位置に設置した後で行ってもよい。This replacement step between air and the replacement gas (absorbing gas) is performed at a temperature lower than the temperature at which the replacement gas and the gas absorbing agent 20 start a reaction so that the replacement gas is not absorbed by the gas absorbing agent 20 during the operation. Is preferred. Further, the replacement of the air and the replacement gas may be performed after the exhaust gas treatment device 2 and the exhaust passage 3 are installed at predetermined positions behind the engine 1.
【００２９】その後、エンジンの運転によって排ガスが
排ガス処理装置２と排気通路３を通過すると、この二重
構造のガス吸収剤２０が昇温されて、密封された置換ガ
スと反応して、この置換ガスを吸収するので、密封され
た二重構造内は真空状態となる。そのため、対流等によ
る伝熱が大幅に低下するので、優れ保温性能が得られる
ことになる。After that, when the exhaust gas passes through the exhaust gas treatment device 2 and the exhaust passage 3 by the operation of the engine, the temperature of the gas absorbent 20 having the double structure is raised, and the gas absorbent 20 reacts with the sealed replacement gas, thereby causing the replacement. Since the gas is absorbed, a vacuum is created in the sealed double structure. Therefore, heat transfer due to convection and the like is significantly reduced, and excellent heat retention performance can be obtained.
【００３０】この水素ガスのガス吸収剤としては、水素
吸蔵合金を使用でき、この水素吸蔵合金としては、Ｌａ
−Ｎｉ（ランタン−ニッケル），Ｔｉ−Ｆｅ（チタン−
鉄），Ｍｇ−Ｎｉ（マグネシウム−ニッケル），Ｆｅ
０．９−Ｎｉ０．１−Ｔｉ（鉄０．９−ニッケル０．１
−チタン）の合金等を用いることができるが、排ガス処
理において最高温度となる９００℃程度では水素を排出
しない特性を有するものが好ましく、水素放出温度が高
い希土類系の水素吸蔵合金が好ましい。As a gas absorbent for the hydrogen gas, a hydrogen storage alloy can be used.
-Ni (lanthanum-nickel), Ti-Fe (titanium-
Iron), Mg-Ni (magnesium-nickel), Fe
0.9-Ni0.1-Ti (iron 0.9-nickel 0.1
An alloy of (titanium) or the like can be used, but it is preferable that the alloy has a characteristic of not discharging hydrogen at about 900 ° C., which is the maximum temperature in exhaust gas treatment, and a rare earth-based hydrogen storage alloy having a high hydrogen release temperature is preferable.
【００３１】また、酸素ガスのガス吸収剤としては、金
属鉄、金属マグネシウム、金属アルミニウムの微粉末等
を用いることができる。As the oxygen gas absorber, fine powders of metallic iron, metallic magnesium, metallic aluminum and the like can be used.
【００３２】そして、酸化窒素ガスのガス吸収剤とし
て、金属バリウム、酸化バリウム等を用いることができ
る。この空気中のガス成分の一つである酸素ガスに対す
るガス吸収剤を使用する場合には、空気中に酸素ガスが
２１％もあるため、ガス置換を行わなくても低圧にする
ことができる。但し、より高い真空状態が必要な場合に
は、ガス置換が必要である。As a gas absorbent for the nitrogen oxide gas, metal barium, barium oxide or the like can be used. When a gas absorbent for oxygen gas, which is one of the gas components in the air, is used, the pressure can be reduced without performing gas replacement because the air contains 21% of the oxygen gas. However, when a higher vacuum state is required, gas replacement is required.
【００３３】更に、二重構造の内壁１１と外壁１２の間
に、更に、金網１４を配備して、この金網１４と遮蔽板
１３の組合せにより、遮蔽板１３やガス吸収剤２０と内
壁１１又は外壁１２との接触及び支持を金網１４を介し
て行うことにより、遮蔽板１３とガス吸収剤２０と内壁
１１や外壁１２との接触面積を小さくして、内壁１１や
外壁１２との間の伝熱経路の伝熱面積を小さくし、保温
能力を高める。Further, a wire mesh 14 is further provided between the inner wall 11 and the outer wall 12 of the double structure, and a combination of the wire mesh 14 and the shield plate 13 allows the shielding plate 13 or the gas absorbent 20 to be connected to the inner wall 11 or By performing contact and support with the outer wall 12 through the wire mesh 14, the contact area between the shielding plate 13, the gas absorbent 20, the inner wall 11, and the outer wall 12 is reduced, and the transmission between the inner wall 11 and the outer wall 12 is reduced. Reduce the heat transfer area of the heat path and increase the heat retention capacity.
【００３４】なお、この二重構造の保温構造に対して、
更に、セラミックウール等の保温材を巻回したりする保
温構造を組み合わせることもできる。In addition, with respect to this double insulation structure,
Further, a heat insulating structure in which a heat insulating material such as ceramic wool is wound may be combined.
【００３５】〔実施例〕実施例として、本発明の二重構
造の保温構造で置換ガスを水素とし、真空度を約１３Ｐ
ａ（１０-1Ｔｏｒｒ）程度として形成されたケース内に
酸化触媒を担持したハニカムコーディエライトセラミッ
クフィルタ（排ガス浄化装置）を設置し、エンジン後方
に設置して、連続して排ガス中の粒子状物質を燃焼する
試験を行った。[Embodiment] As an embodiment, the replacement temperature is set to hydrogen and the degree of vacuum is set to about 13
a, a honeycomb cordierite ceramic filter (exhaust gas purifying device) supporting an oxidation catalyst is installed in a case formed at about (10 -1 Torr), and is installed at the rear of the engine. A test was conducted to burn the material.
【００３６】また、比較例として、従来技術の、アルミ
ナの断熱マットで巻き回した状態の排気管及び排ガス処
理装置においても同様な試験を行った。As a comparative example, a similar test was performed on a conventional exhaust pipe and an exhaust gas treatment apparatus wound around an alumina insulating mat.
【００３７】その結果、連続燃焼可能なエンジンマニホ
ールドでの排気温度は、実施例では３００℃、比較例で
は４００℃となり、また、エンジンマニホールドの排気
温度が４００℃における排ガス処理装置の出口温度は、
実施例では３５０℃、比較例では２２０℃となった。そ
して、燃費の悪化率は、実施例では３％、比較例では５
％となった。As a result, the exhaust temperature at the engine manifold capable of continuous combustion is 300 ° C. in the example and 400 ° C. in the comparative example. Further, when the exhaust temperature of the engine manifold is 400 ° C., the outlet temperature of the exhaust gas treatment device is:
The temperature was 350 ° C. in the example and 220 ° C. in the comparative example. The fuel consumption deterioration rate is 3% in the example and 5% in the comparative example.
%.
【００３８】[0038]
【発明の効果】以上説明したように、本発明に係る排ガ
ス処理装置及び排気通路の保温構造によれば、二重構造
内の真空により対流伝熱を減少でき、また、輻射熱遮蔽
板により放射伝熱（輻射伝熱）を減少できるので優れた
保温性能を発揮できる。また、二重構造の内の輻射遮熱
板やガス吸収剤の固定及び支持を金網を介して行うこと
により、伝導伝熱も減少できる。As described above, according to the exhaust gas treatment apparatus and the heat retaining structure of the exhaust passage according to the present invention, the convective heat transfer can be reduced by the vacuum in the double structure, and the radiant heat shielding plate allows the radiation transfer. Excellent heat retention performance can be exhibited because heat (radiant heat transfer) can be reduced. In addition, conduction and heat transfer can be reduced by fixing and supporting the radiation heat shield plate and the gas absorbent in the double structure through the wire mesh.
【００３９】従って、放熱による排ガスの温度の低下が
少なくなるので、エンジン運転の広い範囲で触媒活性を
得ることができるようになる。Therefore, the temperature of the exhaust gas due to the heat radiation is less reduced, so that the catalytic activity can be obtained in a wide range of engine operation.
【００４０】そのため、特に、ディーゼルパティキュレ
ートフィルタ（ＤＰＦ）装置においては粒子状物質を触
媒作用により酸化除去できる運転領域が広くなり、フィ
ルタ再生のための排ガス昇温の燃料噴射制御を減少でき
るので、燃費の悪化を抑制できる。Therefore, in particular, in a diesel particulate filter (DPF) device, an operation range in which particulate matter can be oxidized and removed by a catalytic action is widened, and the fuel injection control for increasing the temperature of exhaust gas for filter regeneration can be reduced. Fuel economy can be suppressed from deteriorating.
【図１】本発明の実施の形態の排ガス処理装置の保温構
造を示す断面図である。FIG. 1 is a cross-sectional view showing a heat retaining structure of an exhaust gas treatment device according to an embodiment of the present invention.
【図２】図１のＡ部分の拡大図である。FIG. 2 is an enlarged view of a portion A in FIG.
【図３】排ガス処理装置の配置を示す図である。FIG. 3 is a diagram showing an arrangement of an exhaust gas treatment device.
１ エンジン ２ 排ガス処理装置 ３ 排気通路 １１ 内壁 １２ 外壁 ２０ ガス吸収剤 ３０ 輻射熱遮蔽板 DESCRIPTION OF SYMBOLS 1 Engine 2 Exhaust gas treatment apparatus 3 Exhaust passage 11 Inner wall 12 Outer wall 20 Gas absorbent 30 Radiation heat shielding plate
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ０１Ｎ 3/24 Ｆ０１Ｎ 3/24 Ｅ ４Ｇ０６６ Ｆ 7/08 7/08 Ａ Ｆ１６Ｌ 59/06 Ｆ１６Ｌ 59/06 Ｆ２３Ｊ 13/02 Ｆ２３Ｊ 13/02 Ｆターム(参考） 3G004 AA01 BA06 DA00 DA01 DA14 DA21 EA05 FA00 FA04 3G090 AA02 AA03 BA01 EA01 3G091 AA02 AA18 AB02 AB13 BA00 BA04 GA06 HA00 HB01 3H036 AA01 AA09 AB01 AB34 3K070 BA04 4G066 AA02B AA16B CA28 CA37 CA38 DA01 Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (reference) F01N 3/24 F01N 3/24 E 4G066 F 7/08 7/08 A F16L 59/06 F16L 59/06 F23J 13/02 F23J 13/02 F-term (reference) 3G004 AA01 BA06 DA00 DA01 DA14 DA21 EA05 FA00 FA04 3G090 AA02 AA03 BA01 EA01 3G091 AA02 AA18 AB02 AB13 BA00 BA04 GA06 HA00 HB01 3H036 AA01 AA09 AB01 AB34 3K070A02CA37
Claims (7)
理装置に至る排気通路の少なくとも一方において、外装
を内壁と外壁を有する二重構造に形成し、該二重構造の
前記内壁と前記外壁の間に、置換ガスを吸収するガス吸
収剤と、輻射熱遮蔽板とを配備し、該二重構造内の空気
と置換した前記置換ガスを前記ガス吸収剤に吸収させて
該二重構造内を真空にして形成したことを特徴とする排
ガス処理装置及び排気通路の保温構造。At least one of an exhaust gas treatment device of an engine and an exhaust passage leading to the exhaust gas treatment device has an exterior formed in a double structure having an inner wall and an outer wall, and between the inner wall and the outer wall of the double structure. In addition, a gas absorbent for absorbing the replacement gas and a radiation heat shield plate are provided, and the replacement gas, which has been replaced with air in the double structure, is absorbed by the gas absorber to evacuate the inside of the double structure. An exhaust gas treatment device and a heat retaining structure for an exhaust passage, characterized by being formed by:
理装置に至る排気通路の少なくとも一方において、外装
を内壁と外壁を有する二重構造に形成し、該二重構造の
前記内壁と前記外壁の間に、空気中のガス成分を吸収す
るガス吸収剤と、輻射熱遮蔽板とを配備したことを特徴
とする排ガス処理装置及び排気通路の保温構造。2. An at least one of an exhaust gas treatment device for an engine and an exhaust passage leading to the exhaust gas treatment device, wherein an exterior is formed in a double structure having an inner wall and an outer wall, and a portion between the inner wall and the outer wall of the double structure is provided. An exhaust gas treatment device and a heat retaining structure for an exhaust passage, further comprising a gas absorbent for absorbing gas components in air and a radiation heat shielding plate.
酸化窒素ガスの少なくとも一種類のガスとすることを特
徴とする請求項１記載の排ガス処理装置及び排気通路の
保温構造。3. The method according to claim 1, wherein the replacement gas is hydrogen gas, oxygen gas,
The exhaust gas treatment apparatus and the heat retaining structure for an exhaust passage according to claim 1, wherein the gas is at least one kind of nitrogen oxide gas.
−Ｎｉ，Ｔｉ−Ｆｅ，Ｍｇ−Ｎｉ，Ｆｅ０．９−Ｎｉ
０．１−Ｔｉの合金の内の少なくとも一種類を用いるこ
とを特徴とする請求項１又は３に記載の排ガス処理装置
及び排気通路の保温構造。4. A gas absorber for the hydrogen gas, which is La
-Ni, Ti-Fe, Mg-Ni, Fe0.9-Ni
The exhaust gas treatment apparatus and the heat retaining structure for an exhaust passage according to claim 1 or 3, wherein at least one kind of 0.1-Ti alloy is used.
鉄、金属マグネシウム、金属アルミニウムの微粉末の内
の少なくとも一種類を用いることを特徴とする請求項１
〜３のいずれかに記載の排ガス処理装置及び排気通路の
保温構造。5. The method according to claim 1, wherein at least one of fine powders of metallic iron, metallic magnesium, and metallic aluminum is used as the gas absorbent for oxygen gas.
An exhaust gas treatment device according to any one of claims 1 to 3, and a heat retaining structure for an exhaust passage.
金属バリウム、酸化バリウムの内の少なくとも一種類を
用いることを特徴とする請求項１又は３に記載の排ガス
処理装置及び排気通路の保温構造。6. As a gas absorbent for the nitrogen oxide gas,
4. The exhaust gas processing apparatus and the heat retaining structure for an exhaust passage according to claim 1, wherein at least one of metal barium and barium oxide is used.
に、更に、金網を配備したことを特徴とする請求項１〜
６のいずれか１項に記載の排ガス処理装置及び排気通路
の保温構造。7. A wire mesh is further provided between the inner wall and the outer wall of the double structure.
The exhaust gas treatment device according to any one of claims 6 to 9, and a heat retaining structure for an exhaust passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001154921A JP2002349259A (en) | 2001-05-24 | 2001-05-24 | Heat retaining structure for exhaust gas processing device and exhaust passage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001154921A JP2002349259A (en) | 2001-05-24 | 2001-05-24 | Heat retaining structure for exhaust gas processing device and exhaust passage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002349259A true JP2002349259A (en) | 2002-12-04 |
Family
ID=18999184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001154921A Pending JP2002349259A (en) | 2001-05-24 | 2001-05-24 | Heat retaining structure for exhaust gas processing device and exhaust passage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002349259A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010090970A (en) * | 2008-10-07 | 2010-04-22 | Ebara Corp | Heat-insulating structure and exhaust gas treatment device |
| JP2018178765A (en) * | 2017-04-05 | 2018-11-15 | 三和パッキング工業株式会社 | Cover member |
| WO2019003475A1 (en) * | 2017-06-27 | 2019-01-03 | 栗田工業株式会社 | Vacuum retention sheet |
| JP2019183663A (en) * | 2018-04-02 | 2019-10-24 | 株式会社豊田中央研究所 | Exhaust emission control device |
-
2001
- 2001-05-24 JP JP2001154921A patent/JP2002349259A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010090970A (en) * | 2008-10-07 | 2010-04-22 | Ebara Corp | Heat-insulating structure and exhaust gas treatment device |
| JP2018178765A (en) * | 2017-04-05 | 2018-11-15 | 三和パッキング工業株式会社 | Cover member |
| WO2019003475A1 (en) * | 2017-06-27 | 2019-01-03 | 栗田工業株式会社 | Vacuum retention sheet |
| JP2019183663A (en) * | 2018-04-02 | 2019-10-24 | 株式会社豊田中央研究所 | Exhaust emission control device |
| JP7063069B2 (en) | 2018-04-02 | 2022-05-09 | 株式会社豊田中央研究所 | Exhaust gas purification device |
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