JPH05309233A - Catalytic denitrification device - Google Patents
Catalytic denitrification deviceInfo
- Publication number
- JPH05309233A JPH05309233A JP4113617A JP11361792A JPH05309233A JP H05309233 A JPH05309233 A JP H05309233A JP 4113617 A JP4113617 A JP 4113617A JP 11361792 A JP11361792 A JP 11361792A JP H05309233 A JPH05309233 A JP H05309233A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- exhaust gas
- dust
- layer
- catalytic
- 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.)
- Granted
Links
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims abstract description 66
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 10
- 239000000428 dust Substances 0.000 abstract description 49
- 238000002485 combustion reaction Methods 0.000 description 25
- 238000006555 catalytic reaction Methods 0.000 description 24
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 239000004071 soot Substances 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、都市ごみ焼却炉その他
の排ガス処理設備等に適用される触媒脱硝装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalytic denitration device applied to municipal waste incinerators and other exhaust gas treatment equipment.
【０００２】[0002]
【従来の技術】従来の都市ごみ焼却炉等の排ガス処理設
備に用いられる触媒脱硝装置では、図６に示すように、
燃焼排ガスが白抜き矢印で示す上方から下方へ向って流
れるダウンフロー型式の触媒反応塔１内に、複数のハニ
カム状の触媒層２を設置し、各触媒層２に圧縮空気を噴
出するスートブロワ３を設置していた。2. Description of the Related Art As shown in FIG. 6, a conventional catalyst denitration apparatus used for an exhaust gas treatment facility such as a municipal waste incinerator has
A plurality of honeycomb-shaped catalyst layers 2 are installed in a down-flow type catalytic reaction tower 1 in which combustion exhaust gas flows from the upper side to the lower side indicated by white arrows, and a soot blower 3 for ejecting compressed air to each catalyst layer 2. Was installed.
【０００３】[0003]
【発明が解決しようとする課題】前記の従来の触媒脱硝
装置においては、排ガス中のダスト濃度が２mg／Nm3 を
超える条件においては、ダストがハニカム状触媒の上表
面に付着し、その付着ダストの成長速度が速いために、
圧縮空気を利用したスートブロワでは、ダスト除去効果
が十分でない。そのため、短時間のうちにハニカム状触
媒の格子の閉塞が進行し、反応塔の圧力損失が上昇する
ため、長期間の連続運転が不可能であった。反応塔の圧
力損失が許容値を超えた時には、炉を停止し、触媒を反
応塔外へ抜き出して清掃する必要があった。In the above conventional catalytic denitration apparatus, when the dust concentration in the exhaust gas exceeds 2 mg / Nm 3 , the dust adheres to the upper surface of the honeycomb-shaped catalyst and the adhered dust Because of the fast growth rate of
Soot blowers using compressed air do not have sufficient dust removal effect. Therefore, the lattice of the honeycomb-shaped catalyst is clogged within a short time, and the pressure loss of the reaction tower is increased, so that long-term continuous operation is impossible. When the pressure loss in the reaction tower exceeded the allowable value, it was necessary to shut down the furnace and extract the catalyst out of the reaction tower for cleaning.
【０００４】また、触媒層にダストが付着し格子を閉塞
させた場合、触媒は破損しやすいので清掃が難しいばか
りでなく、触媒に付着したダスト中の KclやNacl等の有
害物質が、触媒中に移行し触媒を劣化させて脱硝性能を
低下させるため、触媒の寿命を短くする欠点があった。Further, when dust adheres to the catalyst layer to block the lattice, the catalyst is easily damaged and is not only difficult to clean, but also harmful substances such as Kcl and Nacl in the dust adhered to the catalyst are contained in the catalyst. However, there is a drawback that the life of the catalyst is shortened because the catalyst is deteriorated and the denitration performance is deteriorated.
【０００５】本発明は、従来の触媒脱硝装置の以上の問
題点を解決することができる触媒脱硝装置を提供しよう
とするものである。The present invention is intended to provide a catalytic denitration device which can solve the above problems of the conventional catalytic denitration device.
【０００６】[0006]
（１） 本発明は、鉛直方向に設置され排ガスが下方か
ら上方へ向って流れる反応部内にハニカム状に整形した
脱硝用の触媒を配置した触媒脱硝装置において、前記触
媒の上流側に整流格子を設置したことを特徴とする。 （２）また本発明は、鉛直方向に設置され排ガスが上方
から下方へ向って流れる反応部内にハニカム状に整形し
た脱硝用の触媒を配置した触媒脱硝装置において、排ガ
スの反転ダクトと同反転ダクトの下流側の整流格子をそ
れぞれ前記触媒の上流側に設置したことを特徴とする。(1) The present invention relates to a catalytic denitration apparatus in which a honeycomb-shaped catalyst for denitration is arranged in a reaction section which is installed in a vertical direction and in which exhaust gas flows upward from below. It is characterized by being installed. (2) Further, the present invention is a catalyst denitration apparatus in which a honeycomb-shaped catalyst for denitration is arranged in a reaction section which is installed vertically and in which exhaust gas flows downward from above. The downstream rectifying grids are installed on the upstream side of the catalyst, respectively.
【０００７】[0007]
【作用】前記本発明（１）においては、排ガスが下方か
ら上方へ向って流れる反応部内に配置されたハニカム状
の脱硝用の触媒の上流側に整流格子を設置しているため
に、排ガス中のダストは整流格子に付着して除去され
る。また、排ガスは整流格子により十分に整流された上
で触媒内へ流入するので、触媒入口における排ガス流れ
の乱れにより触媒にダストが付着することが防止され
る。In the present invention (1), since the rectification grid is installed on the upstream side of the honeycomb-shaped catalyst for denitration arranged in the reaction section in which the exhaust gas flows upward from below, Dust adheres to the rectifying grid and is removed. Further, since the exhaust gas is sufficiently rectified by the rectifying grid and then flows into the catalyst, dust is prevented from adhering to the catalyst due to the turbulence of the exhaust gas flow at the catalyst inlet.
【０００８】前記本発明（２）においては、排ガスが上
方から下方へ向って流れて反応部内へ流入する排ガス
は、先ず反転ダクトによってその方向が反転され、これ
によって起る慣性集じん作用により排ガス中の大粒径の
ダストが捕集される。また、反転ダクトを設けたことに
よって、反応部の上流側に堆積したダストが落下しても
同反転ダクトによって捕集され、触媒の上面を直撃する
ことが防止される。以上のように、大粒径のダストが捕
集除去された排ガスは、その後整流格子に流入して、排
ガス中のダストが整流格子に付着して除去される。ま
た、排ガスは整流格子により十分に整流された上で触媒
内へ流入するので、触媒入口における排ガス流れの乱れ
により触媒にダストが付着することが防止される。In the present invention (2), the direction of the exhaust gas flowing from the upper side to the lower side and flowing into the reaction section is first reversed by the reversing duct, and the inertial dust collecting action caused thereby causes the exhaust gas to move. The large-sized dust inside is collected. Further, by providing the reversing duct, even if the dust accumulated on the upstream side of the reaction portion falls, it is collected by the reversing duct and is prevented from directly hitting the upper surface of the catalyst. As described above, the exhaust gas from which the large-sized dust has been collected and removed then flows into the rectification grid, and the dust in the exhaust gas adheres to the rectification grid and is removed. Further, since the exhaust gas is sufficiently rectified by the rectifying grid and then flows into the catalyst, dust is prevented from adhering to the catalyst due to the turbulence of the exhaust gas flow at the catalyst inlet.
【０００９】[0009]
【実施例】本発明の第１の実施例を、図１及び図２によ
って説明する。図２において、２０はごみ焼却炉等の
炉、２１は炉２０の燃焼排ガスによって蒸気を発生する
ボイラ、２２はボイラ２１を出た燃焼排ガスが導入され
る集じん機であり、集じん機２２を出た排ガスにはアン
モニア（ＮＨ3 ）が添加されて、排ガス煙道に設けられ
た脱硝用の触媒が充填されたアップフロー型式の触媒反
応塔１の下部に導入され、ここで燃焼排ガスの脱硝が行
なわれ、燃焼排ガスは誘引ファン２３で誘引されて触媒
反応塔１の頂部から排出され煙突２４から外部へ放出さ
れるようになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. In FIG. 2, 20 is a furnace such as a refuse incinerator, 21 is a boiler that generates steam by the combustion exhaust gas of the furnace 20, 22 is a dust collector into which the combustion exhaust gas that exits the boiler 21 is introduced, and a dust collector 22 Ammonia (NH 3 ) is added to the exhaust gas discharged from the exhaust gas and introduced into the lower part of the upflow type catalytic reaction tower 1 filled with the catalyst for denitration provided in the exhaust gas flue, where the combustion exhaust gas The denitration is performed, and the combustion exhaust gas is attracted by the attracting fan 23 and discharged from the top of the catalytic reaction tower 1 and discharged from the chimney 24 to the outside.
【００１０】前記触媒反応塔１は、ほぼ鉛直の方向に配
置され、図１（ａ）に白抜き矢印で示す方向へ流れる燃
焼排ガスが下方から上方へ向って流れるアップフロー型
式のものである。同触媒反応塔１内には、ハニカム状に
整形された脱硝用の触媒層の上流側の第１層２ａと下流
側の第２層２ｂがほぼ水平に配置されており、また、圧
縮空気を前記触媒層の第１層２ａと第２層２ｂのそれぞ
れに下方から吹き付けるスートブロワ３が設けられてい
る。The catalytic reaction tower 1 is of an upflow type, which is arranged in a substantially vertical direction and in which combustion exhaust gas flowing in a direction indicated by a white arrow in FIG. 1A flows upward from below. In the catalytic reaction tower 1, a first layer 2a on the upstream side and a second layer 2b on the downstream side of a catalyst layer for denitration shaped into a honeycomb shape are arranged substantially horizontally, and compressed air A soot blower 3 for spraying from below is provided on each of the first layer 2a and the second layer 2b of the catalyst layer.
【００１１】前記触媒層の第１層２ａと第２層２ｂは、
図１（ｂ）に示すように、例えば、５ mm ，７ mm ，１
０ mm 程度の開口ピッチをもつ格子状に整形されたハニ
カム状のものである。触媒層の第１層２ａの下方の触媒
反応塔１内には、整流格子５が設けられている。同整流
格子５は、図１（ｄ）に示すように、前記触媒層と同じ
格子目、例えば、５ mm ，７ mm ，１０ mm 程度の開口
ピッチをもつ格子状に整形されたもの、又は図１（ｃ）
に示すように、前記触媒層と同様の開口率を有する多数
の開口５′を有するものが採用される。前記触媒層の第
１層２ａと第２層２ｂの高さ（長さ）を５００ mm とす
る場合には、整流格子５の高さ（長さ）は５０ mm 以下
程度とされ、整流格子５自体の圧損は、触媒層の一層当
りの圧損の１／５以下とするように設定される。また、
整流格子５の材質としては、水洗可能な金属、磁界等を
採用する。なお、図１（ａ）中、６はモータＭで駆動さ
れ整流格子５の上面に作用してダストを除去するハンマ
リング装置である。The first layer 2a and the second layer 2b of the catalyst layer are
As shown in FIG. 1B, for example, 5 mm, 7 mm, 1
It is a honeycomb shape shaped in a lattice with an opening pitch of about 0 mm. A rectifying grid 5 is provided in the catalytic reaction tower 1 below the first layer 2a of the catalyst layer. As shown in FIG. 1D, the rectifying grid 5 has the same grid as that of the catalyst layer, for example, a grid shaped with an opening pitch of about 5 mm, 7 mm, and 10 mm, or 1 (c)
As shown in FIG. 3, a catalyst having a large number of openings 5'having the same aperture ratio as the catalyst layer is adopted. When the height (length) of the first layer 2a and the second layer 2b of the catalyst layer is 500 mm, the height (length) of the rectifying grid 5 is about 50 mm or less. The pressure loss of itself is set to be ⅕ or less of the pressure loss per one layer of the catalyst layer. Also,
As the material of the rectifying grid 5, a washable metal, a magnetic field or the like is adopted. In FIG. 1A, 6 is a hammering device which is driven by a motor M and acts on the upper surface of the rectifying grid 5 to remove dust.
【００１２】以上のように構成された本実施例では、炉
２０からの燃焼排ガスは、ボイラ２１で蒸気を発生させ
集じん機２２でダストが除去された後アンモニアが添加
され、触媒反応塔１内を下方から上方へ向って流れる。In the embodiment constructed as described above, the combustion exhaust gas from the furnace 20 is added with ammonia after the steam is generated in the boiler 21 and the dust is removed in the dust collector 22, and the catalytic reaction tower 1 Flows from the bottom to the top.
【００１３】触媒反応器１内においては、燃焼排ガスは
先ず整流格子５を通り、その中に残存するダストが整流
格子５に付着する。燃焼排ガス中のダストがこのように
除去され、同時に燃焼排ガスは整流格子５によって整流
されて触媒層の第１層２ａ，続いて第２層２ｂへ流入し
て脱硝が行われる。In the catalytic reactor 1, the combustion exhaust gas first passes through the rectifying grid 5, and the dust remaining therein adheres to the rectifying grid 5. The dust in the combustion exhaust gas is removed in this way, and at the same time, the combustion exhaust gas is rectified by the rectification grid 5 and flows into the first layer 2a and then the second layer 2b of the catalyst layer for denitration.
【００１４】このように、燃焼排ガスは整流されて触媒
層２ａ，２ｂへ流入するために、同触媒層２ａ，２ｂの
入口のガス流れの乱れがなく、かつ、ダストが整流格子
５によって除去されることと相まって、触媒層２ａ，２
ｂの格子へのダストの付着を防止することができ、触媒
層２ａ，２ｂの圧損の増加を防ぐことができる。As described above, since the combustion exhaust gas is rectified and flows into the catalyst layers 2a and 2b, the gas flow at the inlets of the catalyst layers 2a and 2b is not disturbed, and dust is removed by the rectification grid 5. Coupled with this, the catalyst layers 2a, 2
It is possible to prevent dust from adhering to the lattice of b, and to prevent an increase in pressure loss of the catalyst layers 2a and 2b.
【００１５】また、触媒層２ａ，２ｂの下面のガス流入
部には、燃焼排ガスのダストが付着して成長する傾向が
あるが、付着したダストは自重により下方へ落下しやす
いために、スートブロワ３によってこれを容易に除去す
ることができる。Further, dust of combustion exhaust gas tends to adhere to and grow on the gas inflow portions on the lower surfaces of the catalyst layers 2a and 2b, but since the adhered dust easily falls downward due to its own weight, the soot blower 3 This can be easily removed by.
【００１６】更に、前記のように整流格子５にはダスト
が付着して成長するが、このダストはハンマリング装置
６によって容易に除去することができる。整流格子５に
は、このように一時的にダストが付着するが、同整流格
子５自体の圧損は、前記のように触媒層２ａ，２ｂ自体
の圧損より著しく小さいものであるために、ダスト付着
による整流格子５の圧損の上昇は実際上無視することが
できる。Further, as described above, dust adheres to the rectifying grid 5 and grows, and this dust can be easily removed by the hammering device 6. The dust temporarily adheres to the rectifying grid 5 as described above. However, since the pressure loss of the rectifying grid 5 itself is significantly smaller than the pressure loss of the catalyst layers 2a and 2b itself as described above, the dust adhesion does not occur. The increase in the pressure loss of the rectifying grid 5 due to the above can be practically ignored.
【００１７】本発明の第２の実施例を、図３及び図４に
よって説明する。本実施例においても、炉２０で発生し
ボイラ２１及び集じん機２２を通りアンモニアが添加さ
れた燃焼排ガスが触媒反応塔１で脱硝された上、誘引フ
ァン２３で誘引されて煙突２４から排出されるようにな
っているが、触媒反応塔１は燃焼排ガスが上方から下方
へ向って流れるダウンブロー型式となっている。A second embodiment of the present invention will be described with reference to FIGS. Also in this embodiment, the combustion exhaust gas generated in the furnace 20 and passing through the boiler 21 and the dust collector 22 to which ammonia has been added is denitrified in the catalytic reaction tower 1 and is also attracted by the attracting fan 23 and discharged from the stack 24. However, the catalytic reaction tower 1 is of a down blow type in which the combustion exhaust gas flows downward from above.
【００１８】触媒反応塔１は、ほぼ鉛直の方向に配置さ
れ、図３（ａ）に白抜き矢印で示す方向へ流れる燃焼排
ガスが上方から下方へ向って流れるダウンブロー型式の
ものであり、同触媒反応塔１内には、ハニカム状に整形
された脱硝用の触媒層の上流側の第１層２ａと下流側の
第２層２ｂがほぼ水平に配置されており、また、圧縮空
気を前記触媒層の第１層２ａと第２層２ｂのそれぞれに
上方から吹き付けるスートブロワ３が設けられている。
触媒層２ａ，２ｂは、図３（ｂ）に示すように、格子状
に整形されたハニカム状のものであり、前記第１の実施
例におけると同様な開口ピッチ及び高さを有している。The catalytic reaction tower 1 is of a down-blow type, which is arranged in a substantially vertical direction and in which combustion exhaust gas flowing in the direction indicated by the white arrow in FIG. 3 (a) flows downward from above. In the catalytic reaction tower 1, a first layer 2a on the upstream side and a second layer 2b on the downstream side of a catalyst layer for denitration shaped into a honeycomb shape are arranged substantially horizontally, and compressed air A soot blower 3 for spraying from above is provided on each of the first layer 2a and the second layer 2b of the catalyst layer.
As shown in FIG. 3B, the catalyst layers 2a and 2b are honeycomb-shaped and are shaped like a lattice, and have the same opening pitch and height as in the first embodiment. .
【００１９】触媒層の第１層２ａの上方の触媒反応塔１
内には、整流格子５が設けられている。同整流格子５の
形状、高さ、圧損、材質等は前記第１の実施例における
と同様に選定される。また、圧縮空気を整流格子５の上
面に吹き付けるスートブロワ３ａが整流格子５の上方に
設置されている。Catalytic reaction tower 1 above the first layer 2a of the catalyst layer
A rectifying grid 5 is provided inside. The shape, height, pressure loss, material, etc. of the rectifying grid 5 are selected in the same manner as in the first embodiment. A soot blower 3 a that blows compressed air onto the upper surface of the rectifying grid 5 is installed above the rectifying grid 5.
【００２０】前記触媒反応塔１の頂部に連なる燃焼排ガ
スの煙道の下端部４ｄは、図３（ａ）に示すように、膨
出した矩形の断面形状となっており、水平方向の平板状
の底部４ａに触媒反応塔１の頂部に設けられた矩形の開
口１ａが開口している。この開口１ａの上方に間隔をお
いた前記下端部４ｄ内にはじゃま板４ｂが配置され、同
じゃま板４ｂの縁部より開口１ａを囲うように金網４ｃ
が立設されており、前記の煙道の下端部４ｄ，じゃま板
４ｂ，金網４ｃ及び触媒反応塔の開口１ａによってガス
反転ダクト４が形成されている。As shown in FIG. 3 (a), the lower end portion 4d of the flue of the combustion exhaust gas connected to the top of the catalytic reaction tower 1 has a bulging rectangular cross-sectional shape, and has a flat plate shape in the horizontal direction. A rectangular opening 1a provided at the top of the catalytic reaction tower 1 is opened at the bottom 4a of the. A baffle plate 4b is arranged in the lower end portion 4d spaced above the opening 1a, and a wire mesh 4c is provided so as to surround the opening 1a from the edge of the baffle plate 4b.
The gas reversing duct 4 is formed by the lower end portion 4d of the flue, the baffle plate 4b, the wire netting 4c, and the opening 1a of the catalytic reaction tower.
【００２１】本実施例では、炉２０からの燃焼排ガス
は、ボイラ２１で蒸気を発生させた集じん機２２でダス
トが除去された後アンモニアが添加され、触媒反応塔１
の頂部の開口より触媒反応塔１内へ流入する。この際
に、燃焼排ガスは、前記ガス反転ダクト４において、図
３（ａ）中矢印に示すように、煙道の膨出した下端部４
ｄ内でほぼ水平方向に反転して金網４ｃを通って開口１
ａから触媒反応塔１内へ流入する。燃焼排ガスの流れが
このように反転することによって、燃焼排ガス中の大粒
径のダストは慣性力によって平板状の底部４ａ上に集め
られ除じんが行われる。また、ガス反転ダクト４を設け
たことによって、触媒反応塔１の上流側に設けられた図
示しないダンパ、煙道内のリブ等の突起物上に堆積した
ダストが落下して触媒層の第１層２ａの上面を直撃する
ことが防止される。In the present embodiment, the combustion exhaust gas from the furnace 20 is added with ammonia after dust is removed by the dust collector 22 which has generated steam in the boiler 21, and the catalytic reaction tower 1
Flows into the catalytic reaction column 1 through the opening at the top of the. At this time, the combustion exhaust gas flows through the gas reversal duct 4 as shown by an arrow in FIG.
Inverted substantially horizontally in d, passing through the wire netting 4c and opening 1
It flows from a into the catalytic reaction tower 1. By reversing the flow of the combustion exhaust gas in this way, large-sized dust particles in the combustion exhaust gas are collected by the inertial force on the flat bottom portion 4a and dust is removed. Further, since the gas reversing duct 4 is provided, the dust accumulated on the protrusions such as a damper (not shown) provided on the upstream side of the catalytic reaction tower 1 and ribs in the flue falls to drop the first layer of the catalyst layer. A direct hit on the upper surface of 2a is prevented.
【００２２】このようにガス反転ダクト４で大粒径のダ
ストが除去された燃焼排ガスは整流格子５へ流入して、
残存するダストが整流格子５に付着して除じんが行われ
ると共に、同整流格子５によって整流された上、燃焼排
ガスは触媒層の第１層２ａ，続いて第２層へ流入して脱
硝が行われる。The combustion exhaust gas from which the large particle size dust has been removed in the gas reversal duct 4 flows into the flow-regulating grid 5,
The remaining dust adheres to the rectifying grid 5 to remove dust, and is rectified by the rectifying grid 5, and the combustion exhaust gas flows into the first layer 2a of the catalyst layer and then into the second layer for denitration. Done.
【００２３】このように、燃焼排ガスは整流されて触媒
層２ａ，２ｂへ流入するために、同触媒層２ａ，２ｂの
入口のガス流れの乱れがなく、かつ、ダストがガス反転
ダクトと整流格子５によって除去されることと相まっ
て、触媒層２ａ，２ｂの格子へのダストの付着を防止す
ることができ、触媒層２ａ，２ｂの圧損の増加を防ぐこ
とができる。As described above, since the combustion exhaust gas is rectified and flows into the catalyst layers 2a and 2b, there is no disturbance in the gas flow at the inlets of the catalyst layers 2a and 2b, and dust is present in the gas reversal duct and the rectification grid. In addition to being removed by 5, it is possible to prevent dust from adhering to the lattice of the catalyst layers 2a and 2b, and to prevent an increase in pressure loss of the catalyst layers 2a and 2b.
【００２４】なお、整流格子５に付着したダストは、ス
ートブロワ３ａによって容易に除去することができる。
また、整流格子５には、以上のように一時的にダストが
付着するが、同整流格子５自体の圧損は、前記のように
触媒層２ａ，２ｂ自体の圧損より著しく小さいものであ
るために、ダスト付着による整流格子５の圧損の上昇は
実際上無視することができる。更に、ガス反転ダクト４
において捕集されたダストは、休止時に真空掃除機等に
よって容易に清掃することができる。The dust adhering to the rectifying grid 5 can be easily removed by the soot blower 3a.
Further, although dust is temporarily attached to the rectifying grid 5 as described above, the pressure loss of the rectifying grid 5 itself is significantly smaller than the pressure loss of the catalyst layers 2a and 2b itself as described above. The increase in the pressure loss of the rectifying grid 5 due to the dust adhesion can be practically ignored. Furthermore, the gas reversal duct 4
The dust collected in (1) can be easily cleaned by a vacuum cleaner or the like at rest.
【００２５】図５に、従来の触媒脱硝装置と本実施例と
の触媒反応塔の圧損経時変化の比較を示す。運転条件は
次の通りである。 触媒１０mmピッチ １５０mm□×５００mml （高
さ）を平面配置 整流格子１０mmピッチ １５０mm□×５０mml （高
さ）を平面配置 排ガス ４０，０００ Nm3／h ×２６
０℃ 図５に示すように、本実施例では、稼動時間が増加して
も触媒反応塔の圧損が一定に維持されることが確認され
た。FIG. 5 shows a comparison of changes over time in pressure loss of the catalytic reaction tower between the conventional catalytic denitration apparatus and this example. The operating conditions are as follows. Catalyst 10mm pitch 150mm □ × 500mml (height) arranged in a plane Rectification grid 10mm pitch 150mm □ × 50mml (height) arranged in a plane Exhaust gas 40,000 Nm 3 / h × 26
0 ° C. As shown in FIG. 5, in this example, it was confirmed that the pressure loss of the catalytic reaction column was kept constant even if the operating time was increased.
【００２６】[0026]
【発明の効果】本発明は、特許請求の範囲に記載された
ような整流格子又は排ガスの反転ダクトと整流格子を具
備したことによって、触媒層には、ほとんどダストが付
着せず、また成長することもないので、触媒層の圧損は
運転中ほとんど変化することがなく、長時間触媒脱硝装
置を連続して運転することができる。EFFECTS OF THE INVENTION According to the present invention, since the rectification grid or the exhaust gas reversal duct and the rectification grid as described in the claims are provided, almost no dust adheres to the catalyst layer and the catalyst layer grows. Since the pressure loss of the catalyst layer hardly changes during the operation, the catalyst denitration apparatus can be continuously operated for a long time.
【図１】本発明の第１の実施例を示し、図１（ａ）はそ
の縦断面図、図１（ｂ）は図１（ａ）のＡ部の下面図、
図１（ｃ）及び図１（ｄ）は図１（ａ）のＢ部の下面図
である。1 shows a first embodiment of the present invention, FIG. 1 (a) is a longitudinal sectional view thereof, FIG. 1 (b) is a bottom view of part A of FIG. 1 (a),
1 (c) and 1 (d) are bottom views of the portion B in FIG. 1 (a).
【図２】同第１の実施例が用いられる燃焼排ガス処理設
備のフローシート図である。FIG. 2 is a flow sheet diagram of a combustion exhaust gas treatment facility in which the first embodiment is used.
【図３】本発明の第２の実施例を示し、図３（ａ）はそ
の縦断面図、図３（ｂ）は図３（ａ）のＣ部の下面図、
図３（ｃ）は図３（ａ）のＡ−Ａ矢視図である。3 shows a second embodiment of the present invention, FIG. 3 (a) is a longitudinal sectional view thereof, FIG. 3 (b) is a bottom view of a portion C of FIG. 3 (a),
FIG. 3C is a view on arrow AA of FIG.
【図４】同第２の実施例が用いられる燃焼排ガス処理設
備のフローシート図である。FIG. 4 is a flow sheet diagram of a combustion exhaust gas treatment facility in which the second embodiment is used.
【図５】同第２の実施例と従来の触媒脱硝装置の触媒反
応塔の圧損の経時変化の比較図である。FIG. 5 is a comparison diagram of changes over time in pressure loss of the catalytic reaction tower of the conventional catalyst denitration apparatus of the second embodiment.
【図６】従来の触媒脱硝装置の縦断面図である。FIG. 6 is a vertical cross-sectional view of a conventional catalytic denitration device.
１ 触媒反応塔 １ａ 触媒反応塔頂部の開口 ２，２ａ，２ｂ 触媒層 ３，３ａ スートブロワ ４ ガス反転ダクト ４ａ 底部 ４ｂ じゃま板 ４ｃ 金網 ４ｄ 煙道の下端部 ５ 整流格子 ２０ 炉 ２１ ボイラ ２２ 集じん機 ２３ 誘引ファン ２４ 煙突 1 catalytic reaction tower 1a opening of catalytic reaction tower top 2,2a, 2b catalytic layer 3,3a soot blower 4 gas reversing duct 4a bottom 4b baffle plate 4c wire mesh 4d flue lower end 5 straightening grid 20 furnace 21 boiler 22 dust collector 23 Induction fan 24 Chimney
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐藤 鉄雄 横浜市中区錦町12番地 三菱重工業株式会 社横浜製作所内 (72)発明者 太田 雅博 横浜市中区錦町12番地 三菱重工業株式会 社横浜製作所内 (72)発明者 小林 勝彦 横浜市中区錦町12番地 三菱重工業株式会 社横浜製作所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Sato 12 Nishiki-cho, Naka-ku, Yokohama-shi Inside Mitsubishi Heavy Industries Ltd. Yokohama Works (72) Inventor Masahiro Ota 12 Nishiki-cho, Naka-ku, Yokohama Mitsubishi Heavy Industries Ltd. Yokohama Works (72) Inventor Katsuhiko Kobayashi 12 Nishiki-cho, Naka-ku, Yokohama City Mitsubishi Heavy Industries Ltd. Yokohama Works
Claims (2)
方へ向って流れる反応部内にハニカム状に整形した脱硝
用の觸媒を配置した触媒脱硝装置において、前記触媒の
上流側に整流格子を設置したことを特徴とする触媒脱硝
装置。1. A catalytic denitration apparatus in which a honeycomb-shaped denitration medium for denitration is disposed in a reaction section which is installed vertically and in which exhaust gas flows from below to above, and a rectifying grid is provided upstream of the catalyst. A catalytic denitration device characterized in that
方へ向って流れる反応部内にハニカム状に整形した脱硝
用の触媒を配置した触媒脱硝装置において、排ガスの反
転ダクトと同反転ダクトの下流側の整流格子をそれぞれ
前記触媒の上流側に設置したことを特徴とする触媒脱硝
装置。2. A reversing duct for exhaust gas and a downstream side of the reversing duct in a catalytic denitration apparatus in which a honeycomb-shaped catalyst for denitration is arranged in a reaction section which is installed vertically and in which exhaust gas flows downward from above. 2. A catalytic denitration device, characterized in that each of the rectifying grids is installed on the upstream side of the catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11361792A JP3293876B2 (en) | 1992-05-06 | 1992-05-06 | Catalytic denitration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11361792A JP3293876B2 (en) | 1992-05-06 | 1992-05-06 | Catalytic denitration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05309233A true JPH05309233A (en) | 1993-11-22 |
| JP3293876B2 JP3293876B2 (en) | 2002-06-17 |
Family
ID=14616756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11361792A Expired - Fee Related JP3293876B2 (en) | 1992-05-06 | 1992-05-06 | Catalytic denitration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3293876B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005125285A (en) * | 2003-10-27 | 2005-05-19 | Kanken Techno Co Ltd | Method and apparatus for treating N2O-containing exhaust gas |
| JP2011161403A (en) * | 2010-02-12 | 2011-08-25 | Babcock Hitachi Kk | Catalytic reactor |
| EP2357409A3 (en) * | 2010-02-17 | 2015-07-15 | Interprojekt GmbH | Device for denitriding exhaust gas provided with an air blowing unit |
| JP2015222163A (en) * | 2014-05-23 | 2015-12-10 | 三菱日立パワーシステムズ株式会社 | Denitration equipment and catalytic exchange method |
| JP2017187034A (en) * | 2016-03-31 | 2017-10-12 | マン・ディーゼル・アンド・ターボ・エスイー | Exhaust gas post-treatment system and internal combustion engine |
| JP2019076897A (en) * | 2019-01-09 | 2019-05-23 | 三菱日立パワーシステムズ株式会社 | Denitration facility and catalytic exchange method |
| CN111841320A (en) * | 2020-07-13 | 2020-10-30 | 洁华控股股份有限公司 | A high temperature dust removal and denitrification integrated device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016205274A1 (en) * | 2016-03-31 | 2017-10-05 | Man Diesel & Turbo Se | Exhaust after treatment system and internal combustion engine |
-
1992
- 1992-05-06 JP JP11361792A patent/JP3293876B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005125285A (en) * | 2003-10-27 | 2005-05-19 | Kanken Techno Co Ltd | Method and apparatus for treating N2O-containing exhaust gas |
| JP2011161403A (en) * | 2010-02-12 | 2011-08-25 | Babcock Hitachi Kk | Catalytic reactor |
| EP2357409A3 (en) * | 2010-02-17 | 2015-07-15 | Interprojekt GmbH | Device for denitriding exhaust gas provided with an air blowing unit |
| JP2015222163A (en) * | 2014-05-23 | 2015-12-10 | 三菱日立パワーシステムズ株式会社 | Denitration equipment and catalytic exchange method |
| JP2017187034A (en) * | 2016-03-31 | 2017-10-12 | マン・ディーゼル・アンド・ターボ・エスイー | Exhaust gas post-treatment system and internal combustion engine |
| CN107269356A (en) * | 2016-03-31 | 2017-10-20 | 曼柴油机和涡轮机欧洲股份公司 | Exhaust after treatment system and internal combustion engine |
| JP2019076897A (en) * | 2019-01-09 | 2019-05-23 | 三菱日立パワーシステムズ株式会社 | Denitration facility and catalytic exchange method |
| CN111841320A (en) * | 2020-07-13 | 2020-10-30 | 洁华控股股份有限公司 | A high temperature dust removal and denitrification integrated device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3293876B2 (en) | 2002-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212283555U (en) | SCR denitrification facility of cement kiln flue gas | |
| CN117180974B (en) | SCR denitration system | |
| JPH05309233A (en) | Catalytic denitrification device | |
| CN107970772A (en) | A kind of SCR equipment for denitrifying flue gas | |
| JPH0295415A (en) | Waste gas denitration apparatus | |
| CN207929005U (en) | A kind of SCR equipment for denitrifying flue gas | |
| CN112728697A (en) | Indoor air purifier with dust collection mechanism at bottom | |
| CN107282308A (en) | A kind of gauze formula electric dust collector | |
| CN102688731B (en) | A fluidized reactor and a flue gas catalytic denitrification device using the reactor | |
| CN220834953U (en) | SCR denitration system | |
| CN219559028U (en) | Ash blocking device of denitration system | |
| CN220176531U (en) | Catalyst mechanical ash removal anti-blocking device | |
| CN214764226U (en) | Special SOx/NOx control dust collector of building engineering | |
| CN102698594A (en) | Device for catalytic denitration reaction by preheating waste incineration flue gas | |
| CN218281268U (en) | System device for CO-catalytic treatment of NO and CO in sintering flue gas | |
| CN114763909B (en) | Boiler system of circulating fluidized bed coupling ion waterfall | |
| CN213912956U (en) | Integrated multi-pollutant collaborative removal system | |
| CN210645597U (en) | Centrifugal separation type filtering and purifying net disc | |
| CN218764618U (en) | Cement kiln tail gas processing apparatus | |
| JPH0679647B2 (en) | Bag filters in exhaust gas treatment equipment | |
| CN222489589U (en) | Integrated device for dust removal and denitrification of cement kilns | |
| CN214809524U (en) | Electric-bag composite dust collector | |
| KR100458865B1 (en) | A Dust Collector for VOCs, Dusts and Mists Removal | |
| CN214513791U (en) | A device for efficient denitrification of boiler flue gas | |
| JP4022353B2 (en) | Incineration equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20011016 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20020219 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080405 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090405 Year of fee payment: 7 |
|
| LAPS | Cancellation because of no payment of annual fees |