JP2001070805A - Plate type catalyst structure and its production - Google Patents
Plate type catalyst structure and its productionInfo
- Publication number
- JP2001070805A JP2001070805A JP25462199A JP25462199A JP2001070805A JP 2001070805 A JP2001070805 A JP 2001070805A JP 25462199 A JP25462199 A JP 25462199A JP 25462199 A JP25462199 A JP 25462199A JP 2001070805 A JP2001070805 A JP 2001070805A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- plate
- elements
- corrugated
- catalyst structure
- 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
- 239000003054 catalyst Substances 0.000 title claims abstract description 231
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000010030 laminating Methods 0.000 claims abstract description 9
- 238000005452 bending Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000012495 reaction gas Substances 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 229940010552 ammonium molybdate Drugs 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Catalysts (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、板状触媒構造体お
よびその製造方法に係り、特に、圧力損失の増加を回避
し、触媒活性を十分に発揮させることができる板状触媒
構造体およびその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-like catalyst structure and a method for producing the same, and more particularly, to a plate-like catalyst structure capable of avoiding an increase in pressure loss and exhibiting sufficient catalytic activity and a plate-like catalyst structure. It relates to a manufacturing method.
【0002】[0002]
【従来の技術】板状触媒は、ペースト状の触媒原料を触
媒基材に圧延、塗布した平板状の触媒塗布体を、所定温
度に加熱した一対の成形ローラ間に挿入して交互に逆方
向へ折り曲げるか、または交互に山部と谷部を形成して
階段状または波板状に成形することによって製造され
る。すなわち、板状触媒の製造工程においては、製品と
しての板状触媒が一定間隔(ピッチ)で積層するのに好
適な形状となるような工夫がなされるとともに、触媒塗
布体の水分を蒸発させて積層に耐え得るように高強度化
が図られる。そして階段状または波板状に成形された板
状触媒(以下、触媒エレメントという)は、例えば図6
に示すように、多数積層され、枠体内3に収納されて触
媒ユニットとなり、該触媒ユニットが焼成されて板状触
媒構造体となる。2. Description of the Related Art A plate-like catalyst is prepared by rolling a paste-like catalyst material on a catalyst base material and applying the same to a pair of forming rollers heated to a predetermined temperature and alternately in opposite directions. It is manufactured by bending or alternately forming peaks and valleys and forming steps or corrugations. In other words, in the production process of the plate-like catalyst, the plate-like catalyst as a product is devised so as to have a shape suitable for stacking at a constant interval (pitch), and the moisture of the catalyst-coated body is evaporated. Higher strength is achieved so as to withstand lamination. A plate-like catalyst (hereinafter, referred to as a catalyst element) formed in a stepped or corrugated shape is, for example, shown in FIG.
As shown in FIG. 7, a large number of the catalyst units are stacked and housed in the frame body 3 to form a catalyst unit. The catalyst unit is fired to form a plate-shaped catalyst structure.
【0003】しかしながら、上記従来技術では図8およ
び9に示したように、階段状の触媒エレメント1を積層
した際の段差部の重なりが不十分な場合には、垂直方向
の強度が十分得られず、積層高さが均一にならない場合
がある。そして強度が不足した部分またはその周辺部は
荷重を受けやすいために、積層枚数の増加とともに個々
の触媒エレメントの変形量が加算されて、例えば図10
に示したように、触媒積層体全体が大きく変形し、反応
ガスが吹き抜ける部分と滞留する部分とが生じるという
問題があった。特に、近年の触媒装置の小型化の要請に
基いて触媒エレメントを薄膜化してユニット当たりの積
層数を増加することによって一定の荷重に対する触媒エ
レメントの変形量がより大きくなる傾向があり、上述し
た触媒積層体が変形するという問題は従来よりも顕在化
し易くなっている。However, in the above prior art, as shown in FIGS. 8 and 9, when the stepped portions are not sufficiently overlapped when the step-like catalyst elements 1 are stacked, sufficient strength in the vertical direction can be obtained. And the stacking height may not be uniform. Since the portion where the strength is insufficient or its peripheral portion is susceptible to a load, the deformation amount of each catalyst element is added with the increase in the number of stacked layers.
As shown in (1), there has been a problem that the entire catalyst laminate is greatly deformed, and a portion where the reaction gas blows through and a portion where the reaction gas stays are generated. In particular, there is a tendency that the amount of deformation of the catalyst element with respect to a certain load is increased by reducing the thickness of the catalyst element and increasing the number of stacks per unit based on the recent demand for downsizing of the catalyst device. The problem that the laminate is deformed is more evident than before.
【0004】ところで、触媒装置の小型化、触媒の狭ピ
ッチ化、触媒活性の更なる向上等の要請に対応して触媒
の板厚をより薄く、平板部分の積層間隔をより狭くして
触媒と反応ガスとの接触効率を高めるための提案がなさ
れている。図7は、本発明者による未公知の触媒構造体
を示す説明図である。図7において、この触媒構造体
は、階段状の触媒エレメント1を網状物4を介して多数
積層したものであり、前記網状物4によって反応ガス流
を攪拌して触媒効率を向上させるものである。この先行
技術は、触媒エレメント1相互間に配置される網状物4
の形状によって被処理ガスの攪拌度合いを制御できると
いう利点を有しているが、触媒効率をより向上させる余
地が残るものであった。In response to demands for downsizing the catalyst device, narrowing the pitch of the catalyst, and further improving the activity of the catalyst, the thickness of the catalyst is made thinner, and the lamination interval of the flat plate portion is made narrower. Proposals have been made to increase the contact efficiency with the reaction gas. FIG. 7 is an explanatory view showing an unknown catalyst structure by the present inventors. In FIG. 7, this catalyst structure is formed by laminating a large number of step-like catalyst elements 1 via a network 4, and the reaction gas flow is agitated by the network 4 to improve the catalyst efficiency. . This prior art discloses a network 4 arranged between catalytic elements 1.
Has the advantage that the degree of agitation of the gas to be treated can be controlled by the shape, but leaves room for further improvement in the catalyst efficiency.
【0005】[0005]
【発明が解決しようとする課題】本発明の課題は、上記
従来技術および先行技術の課題を解決し、触媒エレメン
トを多数積層してユニット化した板状触媒構造体におい
て、一部で触媒エレメント相互間の積層間隔が変化して
も、その影響を極力小さくして触媒構造体全体として圧
力損失の増加を防止するとともに、十分な触媒効率を発
揮させることができる板状触媒構造体およびその製造方
法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and the prior art. A plate-shaped catalyst structure capable of exhibiting a sufficient catalyst efficiency while suppressing an increase in pressure loss as a whole of the catalyst structure by minimizing the influence of a change in the stacking interval between them, and a method for producing the same Is to provide.
【0006】[0006]
【課題を解決するための手段】上記課題を解決するた
め、本願で特許請求する発明は以下のとおりである。 (1)表面に触媒成分を担持させた長方形もしくは正方
形の平板を、その一対の辺に対して平行な方向に所定の
間隔で階段状に折り曲げて平面部と段差部を交互に形成
した触媒エレメント、または前記平板をその一対の辺に
対して平行な方向に所定の間隔で波板状に湾曲させて山
部と谷部を交互に形成した触媒エレメントを多数積層し
て枠体内に収納した触媒構造体において、前記階段状ま
たは波板状の触媒エレメント相互間の一カ所以上に平板
状の触媒エレメントを介在させたことを特徴とする板状
触媒構造体。Means for Solving the Problems To solve the above problems, the invention claimed in the present application is as follows. (1) A catalytic element in which a rectangular or square flat plate having a catalyst component supported on its surface is bent stepwise at predetermined intervals in a direction parallel to a pair of sides thereof to form a flat portion and a step portion alternately. Or a catalyst in which the flat plate is curved in a corrugated shape at predetermined intervals in a direction parallel to a pair of sides thereof, and a plurality of catalyst elements in which peaks and valleys are alternately formed are stacked and housed in a frame. A plate-like catalyst structure, wherein a plate-like catalyst element is interposed at one or more places between the step-like or corrugated catalyst elements in the structure.
【0007】(2)上記(1)に記載の階段状または波
板状の触媒エレメントを、表裏に貫通する貫通孔を多数
有する金属、セラミックスまたはガラス製の網状物を介
して多数積層して枠体内に収納した板状触媒構造体にお
いて、前記網状物の少なくとも一枚に代えて平板状の触
媒エレメントを用いたことを特徴とする板状触媒構造
体。(2) A frame formed by laminating a large number of the step-like or corrugated catalyst elements described in the above (1) via a metal, ceramics or glass mesh having a large number of through holes penetrating on the front and back sides. A plate-shaped catalyst structure housed in a body, wherein a plate-shaped catalyst element is used instead of at least one of the meshes.
【0008】(3)前記枠体の前記平板状触媒エレメン
トとの接触部に、前記平板状触媒エレメントを支持する
固定手段を設けたことを特徴とする上記(1)または
(2)に記載の板状触媒構造体。 (4)前記平板状の触媒エレメントを挟んで階段状また
は波板状の触媒エレメントの積層方向を変化させたこと
を特徴とする上記(1)〜(3)の何れかに記載の板状
触媒構造体。(3) The fixing device according to (1) or (2), wherein fixing means for supporting the flat catalyst element is provided at a contact portion of the frame with the flat catalyst element. Plate-like catalyst structure. (4) The plate-like catalyst according to any one of the above (1) to (3), wherein the laminating direction of the step-like or corrugated catalyst element is changed with the plate-like catalyst element interposed therebetween. Structure.
【0009】(5)上記(1)に記載の階段状または波
板状の触媒エレメントを多数積層して枠体内に収納する
触媒構造体の製造方法において、前記階段状または波板
状の触媒エレメントを所定枚数積層したのち平板状触媒
エレメントを重ね、該平板状触媒エレメント上にさらに
前記階段状または波板状の触媒エレメントを所定枚数積
層して前記平板状触媒エレメントが前記階段状または波
板状の触媒エレメント相互間の少なくとも1箇所に介在
する触媒積層体とし、該触媒積層体を枠体内に収納する
ことを特徴とする板状触媒構造体の製造方法。(5) In the method for manufacturing a catalyst structure according to the above (1), wherein a large number of step-shaped or corrugated catalyst elements are stacked and housed in a frame, the step-shaped or corrugated catalyst element is provided. After stacking a predetermined number of the flat catalyst elements, a predetermined number of the step-shaped or corrugated catalyst elements are further stacked on the flat catalyst element, and the flat catalyst elements are stacked in the step-shaped or corrugated shape. A method of manufacturing a plate-shaped catalyst structure, comprising: forming a catalyst laminate interposed at least at one position between the catalyst elements, and storing the catalyst laminate in a frame.
【0010】(6)前記枠体として、前記平板状触媒エ
レメントの固定手段を有するものを用いることを特徴と
する上記(5)に記載の板状触媒構造体の製造方法。 (7)前記平板状触媒エレメントを挟んで前記階段状ま
たは波板状の触媒エレメントの積層方向を変化させるこ
とを特徴とする上記(5)または(6)に記載の板状触
媒構造体の製造方法。(6) The method for producing a plate-shaped catalyst structure according to the above (5), wherein the frame having a means for fixing the plate-shaped catalyst element is used. (7) The production of the plate-like catalyst structure according to the above (5) or (6), wherein the laminating direction of the step-like or corrugated catalyst element is changed with the plate-like catalyst element interposed therebetween. Method.
【0011】[0011]
【発明の実施の形態】次に本発明を図面を用いて詳細に
説明する。図1は、本発明の一実施例である、階段状の
触媒エレメント(a)、平板状の触媒エレメント(b)
および触媒構造体(c)を示す説明図である。この触媒
構造体は、表面に触媒成分を担持させた長方形の平板
を、その一対の辺に対して平行な方向に所定の間隔で階
段状に折り曲げて平面部と段差部を交互に形成した、階
段状の触媒エレメント1を多数積層して枠体3内に収納
したものであって、前記階段状触媒エレメント1の相互
間の二カ所、例えば階段状触媒エレメント1の積層数が
50枚毎に平板状触媒エレメント2を介在させたもので
ある(触媒エレメントの一部は図示省略した。以下、同
様)。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a step-like catalyst element (a) and a plate-like catalyst element (b) according to one embodiment of the present invention.
FIG. 3 is an explanatory view showing a catalyst structure (c). This catalyst structure was formed by alternately forming a flat portion and a step portion by bending a rectangular flat plate having a catalyst component supported on its surface in a stepwise manner at predetermined intervals in a direction parallel to the pair of sides, A plurality of step-like catalyst elements 1 are stacked and housed in a frame body 3, and two places between the step-like catalyst elements 1, for example, the number of stacks of the step-like catalyst elements 1 is every 50 sheets. The plate-shaped catalyst element 2 is interposed (a part of the catalyst element is not shown in the drawing. The same applies hereinafter).
【0012】本実施例によれば、階段状触媒エレメント
1の所定積層数毎に平板状触媒エレメント2を介在させ
たことにより、触媒エレメントの歪み、変形量、または
触媒エレメントの積層によって生じるエレメント相互間
の空隙が加算されることなく分散されるので、触媒積層
体の最上部の階段状触媒エレメント1とその上部の枠体
3との間に空隙を生じることがなく、各触媒エレメント
が一定間隔で積層された板状触媒構造体となる。According to the present embodiment, since the plate-like catalyst elements 2 are interposed every predetermined number of stacks of the step-like catalyst elements 1, distortion or deformation of the catalyst elements, or the mutual movement of the catalyst elements caused by the stacking of the catalyst elements. Since the gaps between the catalyst elements are dispersed without being added, no gap is formed between the uppermost step-shaped catalyst element 1 and the upper frame 3 of the catalyst laminate, and each catalyst element is spaced at a predetermined interval. And a plate-like catalyst structure laminated.
【0013】本発明の板状触媒構造体は、階段状または
波板状の触媒エレメント積層体の、所定の階段状または
波板状触媒エレメント相互間に平板状触媒エレメントを
配置したものであり、各階段状または波板状触媒エレメ
ントの歪み、変形量の全てが加算されることなく、分
断、分散されるので、均一なガス流路が形成され易くな
る。歪み等の分断、分散効果は、介在させる平板状触媒
エレメントが多いほど顕著に表れるが、平板状触媒エレ
メント数が多すぎると階段状または波板状の触媒エレメ
ントと平板状触媒エレメントとの間に形成されるガス流
路断面が三角形になってガスが滞留し易くなり、圧力損
失が増加する傾向になる。従って、本発明においては平
板状の触媒エレメントの使用枚数は触媒構造体の強度を
確保するために必要最小限にすることが好ましい。[0013] The plate-like catalyst structure of the present invention comprises a step-like or corrugated-like catalyst element laminate, in which plate-like catalyst elements are arranged between predetermined step-like or corrugated-like catalyst elements. Since all the distortions and deformations of the step-like or corrugated catalyst elements are not added and divided and dispersed, a uniform gas flow path is easily formed. The effect of dividing and dispersing distortions, etc., becomes more pronounced as the number of interposed flat catalyst elements increases, but if the number of flat catalyst elements is too large, a step-like or corrugated catalyst element and a flat catalyst element are interposed. The cross section of the formed gas flow path becomes triangular, so that the gas easily stays, and the pressure loss tends to increase. Therefore, in the present invention, it is preferable that the number of the plate-shaped catalyst elements used is minimized in order to secure the strength of the catalyst structure.
【0014】多数積層した階段状または波板状触媒エレ
メント相互間の一個所以上に平板状触媒エレメントを介
在させる本発明は、階段状または波板状の触媒エレメン
トを網状物を介して多数積層した触媒構造体に適用する
ことができる。すなわち、触媒エレメント相互間に配置
された網状物の少なくとも一つに代えて平板状触媒エレ
メントを用いることにより、触媒構造体全体の変形、歪
み等の発生を抑制すると同時に触媒効率を向上させるこ
とができる。この場合、上記と同様の理由から、平板状
触媒エレメントの使用枚数は必要最小限とすることが好
ましい。In the present invention, a plurality of step-like or corrugated catalyst elements are interposed at one or more locations between the stacked step-like or corrugated catalyst elements. It can be applied to catalyst structures. That is, by using a plate-shaped catalyst element instead of at least one of the meshes arranged between the catalyst elements, it is possible to suppress the occurrence of deformation, distortion, etc. of the entire catalyst structure and to improve the catalyst efficiency. it can. In this case, for the same reason as described above, it is preferable that the number of plate catalyst elements used is minimized.
【0015】本発明において、触媒を収納する、例えば
金属製の枠体の、平板状板状触媒エレメントと接触する
個所に前記平板状触媒エレメントを支持、固定する固定
手段を設けることが好ましく、これによって触媒構造体
全体の曲げ剛性がより向上する。平板状触媒エレメント
の固定手段としては、例えば枠体の内壁面の所定個所に
プレス機械を用いて突起を形成するか、または突起を溶
接したものが挙げられる。In the present invention, it is preferable that a fixing means for supporting and fixing the plate-like catalyst element is provided at a place where the catalyst is accommodated, for example, a metal frame, where the plate-like catalyst element comes into contact. Thereby, the bending rigidity of the entire catalyst structure is further improved. As a means for fixing the plate-like catalyst element, for example, a method in which a projection is formed at a predetermined position on the inner wall surface of the frame using a press machine, or a projection is welded.
【0016】本発明において、階段状または波板状の触
媒エレメント間に介在させた平板状触媒エレメントの前
後で前記階段状または波板状触媒エレメントの積層方向
を変化させることが好ましい。これによって階段状また
は波板状触媒エレメントの成形誤差や歪みが平板状触媒
エレメントの片側に集中することなく分散するので、触
媒構造体全体としての変形または歪みを極力小さくする
ことができ、圧力損失の増加が防止しされ、触媒効率が
さらに向上する。In the present invention, it is preferable to change the laminating direction of the step-like or corrugated catalyst element before and after the plate-like catalyst element interposed between the step-like or corrugated catalyst elements. As a result, the molding error and distortion of the step-like or corrugated catalyst element are dispersed without concentrating on one side of the plate-like catalyst element, so that the deformation or distortion of the entire catalyst structure can be minimized, and the pressure loss can be reduced. Is prevented, and the catalyst efficiency is further improved.
【0017】本発明において、階段状または波板状触媒
エレメントは、金属、セラミックスまたはガラス製の触
媒基材に、例えばペースト状の触媒成分を圧延、塗布
し、これをロールプレス、平プレスなどを用いて機械加
工して成形したものが好適に使用される。加熱手段を備
えた成形装置を用いて触媒の成形と乾燥を同時に行うこ
ともできる。平板状触媒エレメントは、階段状または波
板状の触媒エレメントと同様、あらかじめ乾燥させてそ
の剛性を高めておくことが好ましい。平板状触媒エレメ
ントを調製する際の触媒基材として階段状または波板状
の触媒を調製する際に用いる基材よりも厚いものを用い
ることによってその剛性をさらに高めることもできる。In the present invention, the step-like or corrugated catalyst element is prepared by rolling and applying, for example, a paste-like catalyst component to a metal, ceramics or glass catalyst base, and subjecting the same to a roll press, a flat press or the like. What machined and machined using it is used suitably. The molding and drying of the catalyst can be performed simultaneously by using a molding apparatus provided with a heating means. The plate-like catalyst element is preferably dried in advance to increase its rigidity, like the step-like or corrugated catalyst element. The rigidity can be further increased by using a catalyst substrate which is thicker than a substrate used when preparing a stepwise or corrugated catalyst as a catalyst substrate when preparing a plate-shaped catalyst element.
【0018】[0018]
【実施例】次に、本発明の具体的実施例を説明する。 実施例1 繊維径9μmのEガラス製繊維1400本の撚糸を10
本/25.4mmの粗さで平織りした網状物に、チタニ
ア40%、シリカゾル20%、ポリビニルアルコール1
%のスラリを含浸し、150℃で乾燥して剛性をもたせ
て触媒基材とした。Next, specific examples of the present invention will be described. Example 1 1400 twisted yarns of E glass fiber having a fiber diameter of 9 μm
Book / 40% titania, 20% silica sol, polyvinyl alcohol 1
% Of the slurry, and dried at 150 ° C. to give rigidity to obtain a catalyst substrate.
【0019】一方、これとは別に、比表面積約270m
2 /gの酸化チタン1.2kgにモリブデン酸アンモニ
ウム((NH4 )6 ・Mo7 O24・4H2 O)を0.2
5kg、メタバナジン酸アンモニウム0.23kgおよ
び蓚酸0.3kg、さらに20wt%シリカゾルをSi
O2 として8wt%添加し、水を加えながら混練してペ
ースト状態にした。このペーストにカオリン系無機繊維
(商品名カオウール)15wt%を加えてさらに混練
し、水分30.5%の触媒ペーストを得た。On the other hand, a specific surface area of about 270 m
2 / g ammonium molybdate titanium oxide 1.2kg of ((NH 4) 6 · Mo 7 O 24 · 4H 2 O) 0.2
5 kg, 0.23 kg of ammonium metavanadate, 0.3 kg of oxalic acid, and 20 wt% silica sol
8 wt% of O 2 was added, and the mixture was kneaded while adding water to form a paste. To this paste was added 15 wt% of kaolin-based inorganic fiber (trade name: kao wool) and further kneaded to obtain a catalyst paste having a water content of 30.5%.
【0020】得られた触媒ペーストを先に調製した触媒
基材2枚の間に置き、一対の圧延ローラでその網目間お
よび網表面に塗布して厚さ0.7mmの平板状の触媒塗
布体を得た。得られた触媒塗布体を加熱金型に挟んで、
乾燥しながら長辺(長さ)L=15mmの平板部と、短
辺(高さ)=4mmの段差部を交互に有する階段状に形
成し、450mm角に切断して階段状触媒エレメントと
した。この触媒エレメント1枚当たりの折り曲げ部数は
29または30であった。一方、前記平板状の触媒塗布
体を乾燥したのち450mm角に切断して平板状の触媒
エレメントとした。The obtained catalyst paste is placed between the two previously prepared catalyst base materials, and is applied to the mesh and the mesh surface thereof with a pair of rolling rollers to form a 0.7 mm-thick plate-shaped catalyst-coated body. I got The obtained catalyst coated body is sandwiched between heating molds,
While drying, a stepped portion having a flat portion having a long side (length) of L = 15 mm and a step portion having a short side (height) of 4 mm alternately was formed, and cut into 450 mm square to obtain a stepped catalyst element. . The number of bent portions per one catalyst element was 29 or 30. On the other hand, after drying the plate-shaped catalyst-coated body, it was cut into 450 mm square to obtain a plate-shaped catalyst element.
【0021】得られた階段状の触媒エレメント1を、図
1の(C)に示したように、その段差部がそれぞれ3m
mずつ重なるように積層し、積層数50枚毎に平板状触
媒エレメント2を1枚配置し、全体として平板状触媒エ
レメントを2枚介在した150枚の階段状触媒エレメン
トからなる触媒積層体を得、これを内部寸法が幅450
mm、高さ450mm、奥行き450mmの枠体3内に
収納し、焼成して触媒構造体を得た。As shown in FIG. 1C, each of the obtained step-like catalyst elements 1 has a stepped portion of 3 m.
m, and one plate-like catalyst element 2 is arranged for every 50 sheets to obtain a catalyst laminate consisting of 150 step-like catalyst elements as a whole with two plate-like catalyst elements interposed. The internal dimensions are 450 width
It was housed in a frame 3 having a height of 450 mm, a height of 450 mm and a depth of 450 mm, and was fired to obtain a catalyst structure.
【0022】実施例2 実施例1で用いた階段状の触媒エレメント1を、図2の
(b)に示したように、実施例1で触媒基材として用い
た剛性を有する、450mm角の網状物4(図2の
(a))を介して多数積層し、最下層から41枚目と8
2枚目の網状物4の代わりに実施例1で用いた平板状触
媒エレメント2を配置して触媒積層体とし、上記実施例
1と同様の枠体3に収納し、焼成して触媒構造体を得
た。使用した階段状触媒エレメントは122枚、網状物
は120枚であった。Example 2 As shown in FIG. 2 (b), the step-like catalyst element 1 used in Example 1 was replaced with a rigid, 450 mm square mesh used as a catalyst substrate in Example 1. A large number are stacked via the object 4 ((a) of FIG. 2),
Instead of the second reticulated material 4, the flat catalyst element 2 used in Example 1 was arranged to form a catalyst laminate, which was housed in the same frame 3 as in Example 1 and calcined to form a catalyst structure. I got The number of step-like catalyst elements used was 122 and the number of meshes was 120.
【0023】実施例3 図3に示すように、平板状触媒エレメント2の上下で、
階段状触媒エレメント1の向きが水平方向に反転するよ
うに積層した以外は実施例1と同様にして触媒構造体を
得た。 実施例4 図4に示すように、平板状触媒エレメント2の上下で、
階段状触媒エレメント1の向きが上下および水平方向に
反転するように積層した以外は上記実施例1と同様にし
て触媒構造体を得た。Example 3 As shown in FIG. 3, above and below a flat catalyst element 2,
A catalyst structure was obtained in the same manner as in Example 1 except that the stepwise catalyst elements 1 were stacked so that the direction of the stepwise catalyst elements 1 was reversed in the horizontal direction. Example 4 As shown in FIG.
A catalyst structure was obtained in the same manner as in Example 1 except that the step-like catalyst elements 1 were stacked such that the directions of the step-like catalyst elements 1 were inverted in the vertical and horizontal directions.
【0024】実施例5 図5に示すように、枠体3として平板状触媒エレメント
2との接触部に固定手段5としての凹凸部を設けた枠体
を用いて前記平板状触媒エレメント2を固定した以外
は、上記実施例1と同様にして触媒構造体を得た。触媒
エレメントの積層枚数は実施例1と同様であった。 比較例1 実施例1で用いた階段状触媒エレメント1を、図6に示
したように、従来技術に従って単に積層して触媒構造体
を得た。Embodiment 5 As shown in FIG. 5, the plate-shaped catalyst element 2 is fixed by using a frame having a concave and convex portion as fixing means 5 at a contact portion with the plate-shaped catalyst element 2 as the frame 3. Except that, a catalyst structure was obtained in the same manner as in Example 1 above. The number of stacked catalyst elements was the same as in Example 1. Comparative Example 1 The step-like catalyst element 1 used in Example 1 was simply laminated according to the conventional technique as shown in FIG. 6 to obtain a catalyst structure.
【0025】比較例2 図7に示すように、平板状の触媒エレメント2を用いな
い以外は上記実施例2と同様にして触媒構造体を得た。
実施例1〜5と比較例1、2の触媒構造体について、本
来枠体3に接触するはずの最上段の階段状触媒エレメン
ト1の段差部の頂部と枠体3の内壁面との間に生じた空
隙を評価したところ、実施例1〜6は空隙がなく接触し
ていたのに対し、比較例1の場合は5箇所、比較例2の
場合は4箇所の空隙が認められた。このことから、実施
例1〜5においては、触媒相互の間隔が一定に保たれ、
触媒構造体全体として歪みや変形が生じなかったことが
分かる。Comparative Example 2 As shown in FIG. 7, a catalyst structure was obtained in the same manner as in Example 2 except that the flat catalyst element 2 was not used.
Regarding the catalyst structures of Examples 1 to 5 and Comparative Examples 1 and 2, between the top of the stepped portion of the uppermost stepped catalyst element 1, which should originally contact the frame 3, and the inner wall surface of the frame 3. When the generated voids were evaluated, Examples 1 to 6 had no voids and were in contact with each other, whereas Comparative Example 1 had five voids and Comparative Example 2 had four voids. From this, in Examples 1 to 5, the distance between the catalysts was kept constant,
It can be seen that no distortion or deformation occurred in the entire catalyst structure.
【0026】[0026]
【発明の効果】本願の請求項1に記載の発明によれば、
階段状または波板状の触媒エレメントの変形量または触
媒エレメントの積層によって生じるエレメント相互間の
空隙が分散されるので、各触媒エレメントが一定間隔で
積層された、均一のガス流路を有する板状触媒構造体と
なる。従って、圧力損失の増加を回避し、十分な触媒性
能を確保することができる。According to the invention described in claim 1 of the present application,
Since the amount of deformation of the stepped or corrugated catalyst elements or the gaps between the elements caused by the stacking of the catalyst elements are dispersed, each of the catalyst elements is stacked at regular intervals and has a uniform gas flow path. It becomes a catalyst structure. Therefore, an increase in pressure loss can be avoided, and sufficient catalyst performance can be ensured.
【0027】本願の請求項2に記載の発明によれば、触
媒積層体全体としての変形を防止し、、かつ触媒効率を
向上させることができる。本願の請求項3に記載の発明
によれば、上記発明の効果に加え、触媒エレメントの変
形量、または触媒エレメントの積層によって生じるエレ
メント相互間の空隙を分散する効果がより向上する。According to the invention described in claim 2 of the present application, it is possible to prevent deformation of the entire catalyst laminate and improve catalyst efficiency. According to the invention described in claim 3 of the present application, in addition to the effects of the above-described invention, the effect of dispersing the amount of deformation of the catalyst elements or the gap between the elements caused by the stacking of the catalyst elements is further improved.
【0028】本願の請求項4に記載の発明によれば、上
記発明の効果に加え、触媒エレメントの変形量、または
触媒エレメント相互間に生じる空隙を分散する効果がよ
り以上に向上する。本願の請求項5に記載の発明によれ
ば、触媒エレメントの変形量、または触媒エレメントの
積層によって生じるエレメント相互間の空隙が分散し、
各触媒エレメントが一定間隔で積層された板状触媒構造
体が得られる。According to the invention described in claim 4 of the present application, in addition to the effects of the above invention, the effect of dispersing the amount of deformation of the catalyst elements or the voids generated between the catalyst elements is further improved. According to the invention described in claim 5 of the present application, the amount of deformation of the catalyst element or the gap between the elements caused by the stacking of the catalyst element is dispersed,
A plate-like catalyst structure in which the catalyst elements are stacked at regular intervals is obtained.
【0029】本願の請求項6に記載の発明によれば、上
記発明の効果に加え、触媒エレメントの変形量、または
エレメント相互間の空隙を分散する効果がより向上す
る。本願の請求項7に記載の発明によれば、上記発明の
効果に加え、触媒エレメントの変形量、またはエレメン
ト相互間に生じる空隙を分散する効果がより以上に向上
する。According to the invention described in claim 6 of the present application, in addition to the effects of the above invention, the amount of deformation of the catalyst element or the effect of dispersing the gap between the elements is further improved. According to the invention described in claim 7 of the present application, in addition to the effects of the above invention, the amount of deformation of the catalyst element or the effect of dispersing the voids generated between the elements is further improved.
【図1】本発明の一実施例を示す触媒構造体ならびに階
段状触媒エレメントおよび平板状触媒エレメトを示す説
明図。FIG. 1 is an explanatory view showing a catalyst structure, a step-like catalyst element, and a plate-like catalyst element according to an embodiment of the present invention.
【図2】本発明の他の実施例を示す触媒構造体および網
状物を示す説明図。FIG. 2 is an explanatory view showing a catalyst structure and a network showing another embodiment of the present invention.
【図3】本発明の他の実施例を示す説明図。FIG. 3 is an explanatory view showing another embodiment of the present invention.
【図4】本発明の別の実施例を示す説明図。FIG. 4 is an explanatory view showing another embodiment of the present invention.
【図5】本発明のさらに別の実施例を示す説明図。FIG. 5 is an explanatory view showing still another embodiment of the present invention.
【図6】従来技術の説明図。FIG. 6 is an explanatory diagram of a conventional technique.
【図7】先行技術の説明図。FIG. 7 is an explanatory diagram of the prior art.
【図8】従来技術の問題点を示す説明図。FIG. 8 is an explanatory diagram showing a problem of the related art.
【図9】図8の一部拡大図。FIG. 9 is a partially enlarged view of FIG. 8;
【図10】従来技術の問題点を示す説明図。FIG. 10 is an explanatory diagram showing a problem of the related art.
1…階段状触媒エレメント、2…平板状触媒エレメン
ト、3…枠体、4…網状物、5…平板状触媒エレメント
の固定手段。DESCRIPTION OF SYMBOLS 1 ... Step catalyst element, 2 ... Flat catalyst element, 3 ... Frame, 4 ... Net, 5 ... Flat catalyst element fixing means.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮本 英治 広島県呉市宝町3番36号 バブコック日立 株式会社呉研究所内 Fターム(参考) 4G069 AA03 AA08 AA11 CA02 DA06 EA21 ED10 EE06 ────────────────────────────────────────────────── ─── Continued on the front page (72) Eiji Miyamoto Inventor 3-36 Takara-cho, Kure-shi, Hiroshima Babcock Hitachi Kure Research Laboratory F-term (reference) 4G069 AA03 AA08 AA11 CA02 DA06 EA21 ED10 EE06
Claims (7)
くは正方形の平板をその一対の辺に対して平行な方向に
所定の間隔で階段状に折り曲げて平面部と段差部を交互
に形成した触媒エレメント、または前記平板をその一対
の辺に対して平行な方向に所定の間隔で波板状に湾曲さ
せて山部と谷部を交互に形成した触媒エレメントを多数
積層して枠体内に収納した触媒構造体であって、前記階
段状または波板状の触媒エレメント相互間の一カ所以上
に平板状の触媒エレメントを介在させたことを特徴とす
る板状触媒構造体。1. A catalyst in which a flat or stepped portion is formed alternately by bending a rectangular or square plate having a catalyst component supported on its surface in a stepwise manner at predetermined intervals in a direction parallel to a pair of sides thereof. The element or the flat plate was bent into a corrugated shape at predetermined intervals in a direction parallel to a pair of sides thereof, and a large number of catalyst elements in which peaks and valleys were alternately formed were stacked and housed in the frame. A plate-like catalyst structure, wherein a plate-like catalyst element is interposed at one or more positions between the step-like or corrugated catalyst elements.
触媒エレメントを、表裏に貫通する貫通孔を多数有する
金属、セラミックスまたはガラス製の網状物を介して多
数積層して枠体内に収納した板状触媒構造体において、
前記網状物の少なくとも一枚に代えて平板状の触媒エレ
メントを用いたことを特徴とする板状触媒構造体。2. The step-like or corrugated catalyst element according to claim 1 is laminated in large numbers via a metal, ceramics or glass mesh having a large number of through-holes penetrating on the front and back sides, and is stacked in a frame. In the stored plate-like catalyst structure,
A plate-like catalyst structure, wherein a plate-like catalyst element is used instead of at least one of the meshes.
の接触部に、前記平板状触媒エレメントを支持する固定
手段を設けたことを特徴とする請求項1または2に記載
の板状触媒構造体。3. The plate-shaped catalyst structure according to claim 1, wherein fixing means for supporting the plate-shaped catalyst element is provided at a contact portion of the frame with the plate-shaped catalyst element. body.
状または波板状の触媒エレメントの積層方向を変化させ
たことを特徴とする請求項1〜3の何れかに記載の板状
触媒構造体。4. The plate-like catalyst structure according to claim 1, wherein the laminating direction of the step-like or corrugated catalyst elements is changed with the plate-like catalyst element interposed therebetween. .
触媒エレメントを多数積層して枠体内に収納する触媒構
造体の製造方法において、前記階段状または波板状の触
媒エレメントを所定枚数積層したのち平板状の触媒エレ
メントを重ね、該平板状触媒エレメント上にさらに前記
階段状または波板状の触媒エレメントを所定枚数積層し
て前記平板状触媒エレメントが前記階段状または波板状
の触媒エレメント相互間の少なくとも1箇所に介在する
触媒積層体とし、該触媒積層体を枠体内に収納すること
を特徴とする板状触媒構造体の製造方法。5. The method for manufacturing a catalyst structure according to claim 1, wherein a plurality of step-shaped or corrugated catalyst elements are stacked and housed in a frame. After laminating the plate-like catalyst elements, a predetermined number of the step-like or corrugated catalyst elements are further laminated on the plate-like catalyst element, and the plate-like catalyst elements are formed in the step-like or corrugated form. A method for manufacturing a plate-shaped catalyst structure, comprising: forming a catalyst laminate interposed at least at one position between catalyst elements, and storing the catalyst laminate in a frame.
ントの固定手段を有するものを用いることを特徴とする
請求項5に記載の板状触媒構造体の製造方法。6. The method for producing a plate-like catalyst structure according to claim 5, wherein a member having a means for fixing the plate-like catalyst element is used as the frame.
階段状または波板状の触媒エレメントの積層方向を変化
させることを特徴とする請求項5または6に記載の板状
触媒構造体の製造方法。7. The method for producing a plate-like catalyst structure according to claim 5, wherein the laminating direction of the step-like or corrugated catalyst elements is changed with the plate-like catalyst element interposed therebetween. .
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Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP25462199A JP2001070805A (en) | 1999-09-08 | 1999-09-08 | Plate type catalyst structure and its production |
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Publication Number | Publication Date |
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1999
- 1999-09-08 JP JP25462199A patent/JP2001070805A/en active Pending
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