JP3878543B2 - Dust remover in air heater - Google Patents

Dust remover in air heater Download PDF

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JP3878543B2
JP3878543B2 JP2002356783A JP2002356783A JP3878543B2 JP 3878543 B2 JP3878543 B2 JP 3878543B2 JP 2002356783 A JP2002356783 A JP 2002356783A JP 2002356783 A JP2002356783 A JP 2002356783A JP 3878543 B2 JP3878543 B2 JP 3878543B2
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heat exchange
pipe
support frame
air heating
group
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JP2004190891A (en
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智彦 高野江
晃裕 小野
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株式会社川崎技研
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Description

【0001】
【発明の属する技術分野】
本発明は、粉塵を含む燃焼ガス、例えば、ゴミ焼却炉で発生した燃焼ガスとの間で熱交換することにより加熱空気を得るようにした空気加熱装置において、この空気加熱装置に設けた熱交換管に付着した粉塵を除去させるための除塵装置に関する。
【0002】
【従来の技術】
この種の空気加熱装置は、燃焼ガスを通過させる空気加熱室内に多数の熱交換管が一定の縦列間隔及び一定の横列間隔で配管された配管群が設けられ、この配管群を構成する各熱交換管内に流通させた空気を前記燃焼ガスの熱により加熱させるようになっている。
このような空気加熱装置では、燃焼ガスに含まれた粉塵が配管群を構成する熱交換管に付着し、熱交換効率を低下させてしまうという問題あった。
【0003】
従来、熱交換管に付着した粉塵を除去するための除塵装置としては、例えば、配管群の縦列間隔内を上下方向に通るように垂直部材(紐状体)を設け、この垂直部材を熱交換管の延長方向に往復移動させることにより、熱交換管の側面側に付着した粉塵を掻き取って除去するようにしたものが知られている(特許文献1参照)。
そのほか、各熱交換管にエアーを吹き付けて粉塵を吹き飛ばすことで除去するようにしたものもある。
【0004】
【特許文献1】
特開2001−241886号公報
【0005】
しかしながら、従来のように、配管群の縦列間隔内を上下方向に通るように垂直部材を設けたものでは、垂直部材が熱交換管の延長方向に往復移動することによって熱交換管の側面側に付着した粉塵を除去できるが、熱交換管の上面側や下面側に付着した粉塵を除去することができない。
特に、図7に示すように、粉塵Dは熱交換管1aの上面側に多く付着するもので、これを除去しないままにしておくと、配管群の横列間隔が粉塵によって塞がれてしまうことがあり、熱交換管による熱交換効率を著しく低下させるばかりでなく、燃焼ガスの流通に乱れを生じさせてしまうという問題があった。
なお、各熱交換管にエアーを吹き付けて粉塵を吹き飛ばすようにしたものでは、各熱交換管に向けて空気吹出口を設ける必要があるなど、その設備が複雑になるし、メンテナンスに手間がかかるという問題があった。
【0006】
本発明は、上記のような問題を解決するためになされたもので、熱交換管の上面側や下面側に付着した粉塵を能率的に除去することができるようにした空気加熱装置における除塵装置を提供することを課題としている。
【0007】
【課題を解決するための手段】
上記の課題を解決するために、本発明の空気加熱装置における除塵装置は、
燃焼ガスを通過させる空気加熱室内に多数の熱交換管が一定の縦列間隔及び一定の横列間隔で配管された配管群が設けられ、この配管群を構成する各熱交換管内に流通させた空気を前記燃焼ガスの熱により加熱させるようにした空気加熱装置において、
前記配管群の上方及び下方に設けられた上側支持枠及び下側支持枠と、
前記上側支持枠及び下側支持枠に上端及び下端が連結された状態で、前記配管群の縦列間隔内を上下方向に通した複数の垂直部材と、
前記複数の垂直部材に支持された状態で、前記配管群の横列間隔内を熱交換管の延長方向と直交する方向に通した水平部材と、
前記上側支持枠及び下側支持枠を熱交換管の延長方向に往復移動させることで、垂直部材及び水平部材を熱交換管の延長方向に往復移動させる往復駆動手段を備え、
前記空気加熱室内に複数の配管群が上下方向に複数段に設けられ、この複数群の配管群には、上下に隣接すると共に、縦列間隔が異なるように形成された少なくとも2段の配管群を含み、
この上下に隣接すると共に、縦列間隔が異なるように形成された少なくとも2段の配管群には、各配管群の縦列間隔内を上下方向に通るように垂直部材が設けられると共に、各配管群の垂直部材が各配管群の間に設けた中間支持枠を介して連結されている構成とした。
【0008】
【発明の実施の形態】
以下、本発明の実施の形態を図面に示す実施例より説明する。尚、本発明の具体的な構成はこの実施例に限定されることはない。
図1は本発明の実施例に係る空気加熱装置における除塵装置の全体側面図、図2は空気加熱装置における除塵装置の全体正面図、図3は空気加熱装置における除塵装置の要部を示す部分正面図、図4は図3のA−A矢視図、図5は空気加熱装置を備えたゴミ焼却炉を示す概略図である。
【0009】
本実施例の空気加熱装置1は、図5に示すように、ゴミ焼却炉としてのシャフト型溶融炉90に設けた生成ガス処理系8の途中に組み込まれている。
前記シャフト型溶融炉90は、炉上部に設けた給塵装置91からゴミを投入し、炉底部に設けたガス供給ノズル92から支燃ガス(酸素)を供給して、投入したゴミを上層の乾燥域を経て中層の熱分解域で熱分解して炭化させ、その炭化灰分(チャー)を下層の溶融域で溶融させ、排出させるようになっている。
【0010】
前記シャフト型溶融炉90での熱分解によって生成される生成ガスは、炉内を上昇し、生成ガス処理系8に導入されていく。
この生成ガス処理系8には、上流側から順に、ガス燃焼室80、燃焼ガス冷却室81、空気加熱室82、集塵装置83が設けられ、これらに生成ガス(燃焼ガス)を順に通過させ、誘引送風機84を経たのち最終的に排気ガスとして煙突85から外気に放出させるようになっている。
【0011】
前記空気加熱装置1は、図1及び図2で示すように、多数の熱交換管1a,1b,1cが一定の縦列間隔S1及び一定の横列間隔S2で配管された配管群11,12,13が空気加熱室82内に設けられている。
この実施例では、空気加熱室内に第1配管群11、第2配管群12、第3配管群13とが上下方向に3段に設けられている。
前記第1配管群11と第2配管群12は、上下に隣接すると共に、縦列間隔S1と及び横列間隔S2が同一に形成され、第1配管群11と第2配管群12を構成する各熱交換管1a,1bの管径も同一に形成されている。
又、第2配管群12と第3配管群13は、上下に隣接すると共に、第3配管群13の縦列間隔S10及び横列間隔S20が第2配管群12の縦列間隔S1及び横列間隔S2より小さくなるように形成され、第3配管群13を構成する熱交換管1cの管径が第2配管群12を構成する熱交換管1bの管径よりも小さく形成されている。
【0012】
又、図1で示すように、第1配管群11を構成する各熱交換管1aの一端口(左端口)を覆うように送風導入ダクト15が設けられ、第1配管群11を構成する各熱交換管1aの他端口(右端口)及び第2配管群12を構成する各熱交換管1bの他端口(右端口)を跨って覆うように第1連通ダクト16が設けられ、第2配管群12を構成する各熱交換管1bの一端口(左端口)及び第3配管群13を構成する各熱交換管1cの一端口(左端口)を跨って覆うように第2連通ダクト17が設けられ、第3配管群13を構成する各熱交換管1cの他端口(右端口)を覆うように排出ダクト18が設けられている。
そして、前記送風導入ダクト15に送風機19(図5に示す)からの空気を供給して、その空気を、第1配管群11→第1連通ダクト16→第2配管群12→第2連通ダクト17→第3配管群13→排出ダクト18の順に流通させるようになっている。
【0013】
前記空気加熱室82内には、前記ガス燃焼室80によって生成ガスを燃焼させた後の燃焼ガスが前記燃焼ガス冷却室81を経て下方から上方に向けて流動するように導入されるもので、この燃焼ガスの熱との熱交換によって前記空気加熱装置1を流通する空気を加熱し、その加熱空気を前記煙突85の手前で排気ガス中に混合させることで、排気ガスの温度を上昇させて、排気ガスが外気に放出される際の水蒸気による白煙を消去させるようになっている。
なお、前記空気加熱室82を通過した燃焼ガスは、空気加熱装置1に供給した空気との熱交換によって温度が低下するため、次の集塵装置83へは、温度が低下した状態の燃焼ガスを供給することができる。
【0014】
前記空気加熱装置1には、各配管群11.12,13を構成する熱交換管1a,1b,1cに付着した粉塵を除去するための除塵装置2が設けられている。
この除塵装置2は、第1配管群11の上方に設けた上側支持枠20と、第3配管群13の下方に設けた下側支持枠21と、第2配管群12と第3配管群13の間に設けた中間支持枠22を備えている。
【0015】
前記上側支持枠20と中間支持枠22との間には、前記第1配管群11及び第2配管群12の縦列間隔S1内を一直線状に上下方向に通した複数本(4本)の上側チェーン30が垂直部材として設けられ、又、中間支持枠22と下側支持枠21との間には、前記第3配管群13の縦列間隔S10内を上下方向に通した複数本(4本)の下側チェーン31が垂直部材として設けられている。
従って、前記上側チェーン30と下側チェーン31は、中間支持枠22によって連結され、この中間支持枠22は、上側チェーン30に対しては下側支持枠として機能し、下側チェーン31に対しては上側支持枠として機能する。
なお、前記垂直部材としての各チェーン30,31は、各支持枠20,21,22に連結したターンバックル35に連結され、このターンバックル35により緊張状態に取り付けられている。
【0016】
前記第1配管群11及び第2配管群12に設けた複数の上側チェーン30には、第1配管群11及び第2配管群12の横列間隔S2内を通るように水平部材としての上側棒材40が支持され、この上側棒材40は、熱交換管1aの延長方向と直交する方向に延長している。
又、前記第3配管群13に設けた複数の下側チェーン31には、第3配管群13の横列間隔S20内を熱交換管1cの上面に接触して通るように水平部材としての下側棒材41が支持され、この下側棒材41は、熱交換管1cの延長方向と直交する方向に延長している。
この場合、上側チェーン30による上側棒材40の支持構造は、図4に示すように、上側チェーン30を内部が長穴33になるように環状に連結し、その長穴33に設けた受け部材34の上に上側棒材40を載置させると共に、この上側棒材40が軸方向にズレ動くのを規制するストッパ43を上側棒材40に突設した構造になっている。
なお、下側チェーン31による下側棒材41の支持構造も上記と同様に形成されている。
【0017】
前記上側支持枠20及び下側支持枠21には、この上側支持枠20及び下側支持枠21を同期して熱交換管の延長方向に同一ストロークStで往復移動させるための往復駆動手段としての電動シリンダ5(エアーシリンダ、油圧シリンダ等でも可)が連結されている。
この電動シリンダ5は、空気加熱室82の外部に取り付けられ、空気加熱室82内に貫通させた連結バー50を介してそれぞれ支持枠20,21に連結されている。
【0018】
また、前記上側支持枠20及び下側支持枠21には、その往復移動をガイドするガイドレール60,61によって支持されている。
上側支持枠20は、空気加熱室82の内面に取り付けた上向ガイドレール60に上側支持枠20に設けた下向きレール受け65を摺動可能に嵌め込むことで支持されている。
下側支持枠21は、空気加熱室82の内面に取り付けた横向ガイドレール61に下側支持枠21に設けた横向きレール受け66を摺動可能に嵌め込むことで支持されている。このように、下側支持枠21を横向ガイドレール61と横向きレール受け66で支持することにより、下側支持枠21が上下に振れ動くことに伴なうレール外れを防止することができる。
【0019】
従って、前記電動シリンダ5を作動させると、上側支持枠20及び下側支持枠21が同期して熱交換管の延長方向に往復移動し、これに伴ない各チェーン30,31及び各棒材40,41及び中間支持枠22も往復移動する。
このとき、前記各棒材40,41が配管群11,12,13の横列間隔S2,S20内を通過し、かつ熱交換管1a,1b,1cの延長方向と直交する方向に延長しているため、横列間隔S2,S20内に溜まる粉塵を除去することができる。
なお、第3配管群13に設けた各棒材41は、熱交換管1cの上面に接触しているため、熱交換管1cの上面に付着した粉塵を掻き取って除去できるが、熱交換管の表面が塗装されているような場合には、その塗膜が剥離するおそれがあるため、第1配管群11及び第2配管群12に設けた棒材40のように、熱交換管1a,1bの上面に接触しない状態で横列間隔S2内に通すのが好ましい。
【0020】
次に、図6は本発明の参考例に係る空気加熱装置における除塵装置の全体側面図である。
この参考例は、空気加熱室82内に、燃焼ガスを横方向に流動するように導入した例で、空気加熱室82に横方向に配置して複数個の配管群14,14が設けられ、この配管群14,14について、上側支持枠20及び下側支持枠21と、複数の垂直部材30と、水平部材40と、往復駆動手段(電動シリンダ5等)を主構成とする除塵装置2を備えている。なお、図の例では、2個の配管群14,14に跨るように除塵装置2を設けているが、各配管群14のそれぞれに独立して除塵装置を設けることができる。
なお、空気加熱室82内に導入する燃焼ガスの流動方向は、実施例のように、下方から上方でもよいし、参考例の例のように、横方向でもよいし、又、上方から下方でもよい。
【0021】
又、本発明の空気加熱装置は、実施例のシャフト型溶融炉以外に、ストーカ型焼却炉にも適用することができるし、空気加熱装置によって加熱した空気をストーカ型焼却炉の燃焼用空気として供給することもできる。
【0022】
【発明の効果】
以上説明したように、本発明の空気加熱装置における除塵装置にあっては、配管群の横列間隔内に水平部材を通したので、熱交換管の上面側や下面側に付着した粉塵を能率的に除去することができる。
【0023】
本発明の空気加熱装置における除塵装置にあっては、縦列間隔が異なる配管群が上下方向に複数段に設けられている場合でも、各配管群の垂直部材を中間支持枠を介して連結させているため、複数段の配管群に対して1機の除塵装置を構成すればよく、構造が簡単になるし、メンテナンスも楽になる。
【図面の簡単な説明】
【図1】 本発明の実施例に係る空気加熱装置における除塵装置の全体側面図である。
【図2】 空気加熱装置における除塵装置の全体正面図である。
【図3】 空気加熱装置における除塵装置の要部を示す部分正面図である。
【図4】 図3のA−A矢視図である。
【図5】 空気加熱装置を備えたゴミ焼却炉を示す概略図である。
【図6】 本発明の参考例に係る空気加熱装置における除塵装置の全体側面図である。
【図7】 粉塵が熱交換管の上面側に付着した状態を示す断面図である。
【符号の説明】
1 空気加熱装置
1a 熱交換管
1b 熱交換管
1c 熱交換管
11 第1配管群
12 第2配管群
13 第3配管群
15 送風導入ダクト
16 第1連通ダクト
17 第2連通ダクト
18 排出ダクト
19 送風機
2 除塵装置
20 上側支持枠
21 下側支持枠
22 中間支持枠
30 上側チェーン(垂直部材)
31 下側チェーン(垂直部材)
33 長穴
34 受け部材
35 ターンバックル
40 上側棒材(水平部材)
41 下側棒材(水平部材)
43 ストッパ
5 電動シリンダ(往復駆動手段)
50 連結バー
60 上向ガイドレール
61 横向ガイドレール
8 生成ガス処理系
80 ガス燃焼室
81 燃焼ガス冷却室
82 空気加熱室
83 集塵装置
84 誘引送風機
85 煙突
90 シャフト型溶融炉
91 給塵装置
92 ガス供給ノズル
S1 縦列間隔
S10 縦列間隔
S2 横列間隔
S20 横列間隔
St ストローク
D 粉塵
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air heating apparatus in which heated air is obtained by exchanging heat with a combustion gas containing dust, for example, a combustion gas generated in a garbage incinerator, and the heat exchange provided in the air heating apparatus The present invention relates to a dust removing device for removing dust adhering to a pipe.
[0002]
[Prior art]
This type of air heating apparatus is provided with a pipe group in which a large number of heat exchange pipes are piped at constant column intervals and constant row intervals in an air heating chamber through which combustion gas passes, and each heat constituting the pipe group is provided. The air circulated in the exchange pipe is heated by the heat of the combustion gas.
In such an air heating device, there is a problem that dust contained in the combustion gas adheres to the heat exchange pipes constituting the pipe group, thereby reducing the heat exchange efficiency.
[0003]
Conventionally, as a dust removing device for removing dust adhering to a heat exchange pipe, for example, a vertical member (string-like body) is provided so as to pass in the vertical direction within a column interval of a pipe group, and this vertical member is subjected to heat exchange. It is known that the dust adhered to the side surface of the heat exchange tube is scraped and removed by reciprocating in the tube extension direction (see Patent Document 1).
In addition, there are some which are removed by blowing air to each heat exchange tube to blow away dust.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-241886
However, in the case where a vertical member is provided so as to pass in the vertical direction within the column interval of the piping group as in the conventional case, the vertical member reciprocates in the extension direction of the heat exchange tube to move to the side surface side of the heat exchange tube. Although the adhering dust can be removed, the dust adhering to the upper surface side and the lower surface side of the heat exchange tube cannot be removed.
In particular, as shown in FIG. 7, dust D adheres to the upper surface side of the heat exchange pipe 1a, and if this is left unremoved, the row spacing of the piping group will be blocked by dust. There is a problem that not only the heat exchange efficiency by the heat exchange pipe is remarkably lowered, but also the distribution of the combustion gas is disturbed.
In addition, in the case where air is blown to each heat exchange tube to blow off dust, it is necessary to provide an air outlet toward each heat exchange tube, and the equipment becomes complicated and maintenance is troublesome. There was a problem.
[0006]
The present invention has been made to solve the above-described problems, and is a dust removing device in an air heating device that can efficiently remove dust adhering to the upper surface side and the lower surface side of a heat exchange tube. It is an issue to provide.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the dust removing device in the air heating device of the present invention is:
A group of pipes in which a large number of heat exchange pipes are piped at a constant column interval and a constant row interval are provided in an air heating chamber through which the combustion gas passes, and the air circulated in each heat exchange pipe constituting the pipe group In the air heating apparatus that is heated by the heat of the combustion gas,
An upper support frame and a lower support frame provided above and below the piping group;
With the upper and lower support frames connected to the upper and lower ends, a plurality of vertical members passing in the vertical direction within the column interval of the pipe group,
A horizontal member that is supported by the plurality of vertical members and that passes through a row interval of the pipe group in a direction orthogonal to the extension direction of the heat exchange tubes;
Reciprocating drive means for reciprocating the vertical member and the horizontal member in the extending direction of the heat exchange tube by reciprocating the upper support frame and the lower support frame in the extending direction of the heat exchange tube,
In the air heating chamber, a plurality of piping groups are provided in a plurality of stages in the vertical direction. The plurality of piping groups include at least two piping groups that are adjacent to each other in the vertical direction and have different column intervals. Including
At least two stages of pipe groups that are adjacent to each other in the vertical direction and have different column intervals are provided with vertical members so as to pass in the vertical direction within the column intervals of the respective pipe groups. It was set as the structure by which the vertical member was connected through the intermediate support frame provided between each piping group .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the examples shown in the drawings. The specific configuration of the present invention is not limited to this embodiment.
1 is an overall side view of a dust removing device in an air heating device according to an embodiment of the present invention, FIG. 2 is an overall front view of the dust removing device in the air heating device, and FIG. 3 is a portion showing a main part of the dust removing device in the air heating device. FIG. 4 is a front view, FIG. 4 is a view taken along arrow AA of FIG. 3, and FIG. 5 is a schematic view showing a refuse incinerator equipped with an air heating device.
[0009]
As shown in FIG. 5, the air heating apparatus 1 of this embodiment is incorporated in the middle of a generated gas treatment system 8 provided in a shaft-type melting furnace 90 as a garbage incinerator.
The shaft-type melting furnace 90 is charged with dust from a dust supply device 91 provided at the top of the furnace, and is supplied with combustion supporting gas (oxygen) from a gas supply nozzle 92 provided at the bottom of the furnace. The carbonized ash (char) is melted and discharged in the lower melting zone through pyrolysis in the middle thermal decomposition zone and carbonization through the drying zone.
[0010]
The product gas generated by the thermal decomposition in the shaft-type melting furnace 90 rises in the furnace and is introduced into the product gas processing system 8.
The generated gas treatment system 8 is provided with a gas combustion chamber 80, a combustion gas cooling chamber 81, an air heating chamber 82, and a dust collecting device 83 in order from the upstream side, through which the generated gas (combustion gas) passes. After the induction blower 84, the exhaust gas is finally discharged from the chimney 85 to the outside air.
[0011]
As shown in FIGS. 1 and 2, the air heating device 1 includes a group of pipes 11, 12, and 13 in which a large number of heat exchange pipes 1a, 1b, and 1c are piped at a constant column interval S1 and a constant row interval S2. Is provided in the air heating chamber 82.
In this embodiment, the first pipe group 11, the second pipe group 12, and the third pipe group 13 are provided in three stages in the vertical direction in the air heating chamber.
The first piping group 11 and the second piping group 12 are adjacent to each other in the vertical direction, and the column interval S1 and the row interval S2 are formed to be the same, and each heat constituting the first piping group 11 and the second piping group 12 is formed. The tube diameters of the exchange tubes 1a and 1b are also formed to be the same.
The second piping group 12 and the third piping group 13 are adjacent to each other in the vertical direction, and the column spacing S10 and the row spacing S20 of the third piping group 13 are smaller than the column spacing S1 and the row spacing S2 of the second piping group 12. The diameter of the heat exchange pipe 1 c constituting the third pipe group 13 is formed smaller than the diameter of the heat exchange pipe 1 b constituting the second pipe group 12.
[0012]
Further, as shown in FIG. 1, an air introduction duct 15 is provided so as to cover one end (left end) of each heat exchange pipe 1 a constituting the first pipe group 11, and each of the first pipe group 11 is constituted. The first communication duct 16 is provided so as to cover the other end (right end) of the heat exchange pipe 1a and the other end (right end) of each heat exchange pipe 1b constituting the second pipe group 12, and the second pipe. The second communication duct 17 covers the one end (left end) of each heat exchange pipe 1b constituting the group 12 and the one end (left end) of each heat exchange pipe 1c constituting the third pipe group 13. A discharge duct 18 is provided so as to cover the other end (right end) of each heat exchange pipe 1 c that is provided and constitutes the third pipe group 13.
And the air from the air blower 19 (shown in FIG. 5) is supplied to the air introduction duct 15, and the air is supplied to the first pipe group 11 → the first communication duct 16 → the second pipe group 12 → the second communication duct. 17 → third piping group 13 → exhaust duct 18 in this order.
[0013]
In the air heating chamber 82, the combustion gas after burning the generated gas in the gas combustion chamber 80 is introduced so as to flow upward from below through the combustion gas cooling chamber 81, The air flowing through the air heating device 1 is heated by heat exchange with the heat of the combustion gas, and the heated air is mixed into the exhaust gas before the chimney 85, thereby increasing the temperature of the exhaust gas. The white smoke caused by water vapor when the exhaust gas is released to the outside air is erased.
Note that the temperature of the combustion gas that has passed through the air heating chamber 82 is lowered by heat exchange with the air supplied to the air heating device 1, and therefore, the combustion gas in a state in which the temperature is lowered is sent to the next dust collector 83. Can be supplied.
[0014]
The air heating device 1 is provided with a dust removing device 2 for removing dust adhering to the heat exchange tubes 1a, 1b, and 1c constituting the pipe groups 11.12 and 13.
The dust removing device 2 includes an upper support frame 20 provided above the first pipe group 11, a lower support frame 21 provided below the third pipe group 13, a second pipe group 12, and a third pipe group 13. An intermediate support frame 22 provided between the two is provided.
[0015]
Between the upper support frame 20 and the intermediate support frame 22, a plurality of (four) upper sides that pass in a straight line in the vertical interval S <b> 1 of the first pipe group 11 and the second pipe group 12. A chain 30 is provided as a vertical member, and a plurality of (four) between the intermediate support frame 22 and the lower support frame 21 are vertically passed through the column interval S10 of the third pipe group 13. A lower chain 31 is provided as a vertical member.
Therefore, the upper chain 30 and the lower chain 31 are connected by the intermediate support frame 22, and the intermediate support frame 22 functions as a lower support frame for the upper chain 30, and Functions as an upper support frame.
Each of the chains 30 and 31 serving as the vertical members is connected to a turnbuckle 35 connected to each of the support frames 20, 21 and 22, and is attached in tension by the turnbuckle 35.
[0016]
The plurality of upper chains 30 provided in the first piping group 11 and the second piping group 12 have upper bars as horizontal members so as to pass through the row interval S2 between the first piping group 11 and the second piping group 12. 40 is supported, and the upper bar 40 extends in a direction orthogonal to the extending direction of the heat exchange tube 1a.
In addition, the plurality of lower chains 31 provided in the third pipe group 13 are arranged on the lower side as a horizontal member so as to pass through the row interval S20 of the third pipe group 13 in contact with the upper surface of the heat exchange pipe 1c. A bar 41 is supported, and the lower bar 41 extends in a direction perpendicular to the extending direction of the heat exchange pipe 1c.
In this case, as shown in FIG. 4, the support structure of the upper bar 40 by the upper chain 30 is formed by connecting the upper chain 30 in an annular shape so that the inside becomes a long hole 33, and a receiving member provided in the long hole 33. The upper bar 40 is mounted on the upper bar 40, and a stopper 43 that restricts the upper bar 40 from moving in the axial direction is provided on the upper bar 40 in a projecting manner.
The support structure of the lower bar 41 by the lower chain 31 is also formed in the same manner as described above.
[0017]
The upper support frame 20 and the lower support frame 21 serve as reciprocating drive means for synchronizing the upper support frame 20 and the lower support frame 21 with the same stroke St in the extending direction of the heat exchange tube. An electric cylinder 5 (which may be an air cylinder, a hydraulic cylinder or the like) is connected.
The electric cylinder 5 is attached to the outside of the air heating chamber 82, and is connected to the support frames 20 and 21 via a connecting bar 50 penetrating the air heating chamber 82.
[0018]
Further, the upper support frame 20 and the lower support frame 21 are supported by guide rails 60 and 61 that guide the reciprocal movement thereof.
The upper support frame 20 is supported by slidably fitting a downward rail receiver 65 provided on the upper support frame 20 into an upward guide rail 60 attached to the inner surface of the air heating chamber 82.
The lower support frame 21 is supported by slidably fitting a lateral rail receiver 66 provided on the lower support frame 21 to a lateral guide rail 61 attached to the inner surface of the air heating chamber 82. In this way, by supporting the lower support frame 21 with the lateral guide rail 61 and the lateral rail receiver 66, it is possible to prevent the rail from coming off due to the lower support frame 21 swinging up and down.
[0019]
Accordingly, when the electric cylinder 5 is operated, the upper support frame 20 and the lower support frame 21 are synchronously reciprocated in the extending direction of the heat exchange pipe, and accordingly, the chains 30 and 31 and the bars 40 are moved. 41 and the intermediate support frame 22 also reciprocate.
At this time, the rods 40 and 41 pass through the row intervals S2 and S20 of the pipe groups 11, 12, and 13 and extend in a direction perpendicular to the extending direction of the heat exchange tubes 1a, 1b, and 1c. Therefore, the dust accumulated in the row intervals S2, S20 can be removed.
In addition, since each bar 41 provided in the 3rd piping group 13 is contacting the upper surface of the heat exchange pipe 1c, it can scrape off and remove the dust adhering to the upper surface of the heat exchange pipe 1c. When the surface of the heat exchanger tube 1a, the coating film may be peeled off, like the bar 40 provided in the first pipe group 11 and the second pipe group 12, It is preferable to pass through the row interval S2 without contacting the upper surface of 1b.
[0020]
Next, FIG. 6 is an overall side view of the dust removing device in the air heating device according to the reference example of the present invention.
This reference example is an example in which the combustion gas is introduced into the air heating chamber 82 so as to flow in the lateral direction, and a plurality of pipe groups 14 and 14 are provided in the air heating chamber 82 in the lateral direction. With respect to the pipe groups 14, 14, the dust removing device 2 mainly comprising an upper support frame 20 and a lower support frame 21, a plurality of vertical members 30, a horizontal member 40, and reciprocating drive means (electric cylinder 5 or the like) is provided. I have. In the example shown in the figure, the dust removing device 2 is provided so as to straddle the two piping groups 14, 14, but each of the piping groups 14 can be provided with a dust removing device independently.
The flow direction of the combustion gas introduced into the air heating chamber 82 may be from the lower side to the upper side as in the embodiment, the horizontal direction as in the example of the reference example, or from the upper side to the lower side. Good.
[0021]
Further, the air heating apparatus of the present invention can be applied to a stoker type incinerator in addition to the shaft type melting furnace of the embodiment, and the air heated by the air heating apparatus is used as combustion air for the stoker type incinerator. It can also be supplied.
[0022]
【The invention's effect】
As described above, in the dust removing device in the air heating device of the present invention, since the horizontal member is passed in the row interval of the pipe group, the dust adhering to the upper surface side and the lower surface side of the heat exchange pipe is efficiently collected. Can be removed.
[0023]
In the dust removing device in the air heating device of the present invention, the vertical members of each pipe group are connected via the intermediate support frame even when the pipe groups having different column intervals are provided in a plurality of stages in the vertical direction. Therefore, a single dust removing device may be configured for a plurality of stages of piping groups, the structure is simplified, and maintenance is facilitated.
[Brief description of the drawings]
FIG. 1 is an overall side view of a dust removing device in an air heating device according to an embodiment of the present invention.
FIG. 2 is an overall front view of a dust removing device in an air heating device.
FIG. 3 is a partial front view showing a main part of a dust removing device in an air heating device.
4 is an AA arrow view of FIG. 3;
FIG. 5 is a schematic view showing a refuse incinerator equipped with an air heating device.
FIG. 6 is an overall side view of a dust removing device in an air heating device according to a reference example of the present invention.
FIG. 7 is a cross-sectional view showing a state in which dust adheres to the upper surface side of the heat exchange tube.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air heating apparatus 1a Heat exchange pipe 1b Heat exchange pipe 1c Heat exchange pipe 11 1st piping group 12 2nd piping group 13 3rd piping group 15 Blower introduction duct 16 1st communication duct 17 2nd communication duct 18 Exhaust duct 19 Blower 2 Dust remover 20 Upper support frame 21 Lower support frame 22 Intermediate support frame 30 Upper chain (vertical member)
31 Lower chain (vertical member)
33 Long hole 34 Receiving member 35 Turn buckle 40 Upper bar (horizontal member)
41 Lower bar (horizontal member)
43 Stopper 5 Electric cylinder (reciprocating drive means)
DESCRIPTION OF SYMBOLS 50 Connection bar 60 Upward guide rail 61 Horizontal guide rail 8 Generated gas processing system 80 Gas combustion chamber 81 Combustion gas cooling chamber 82 Air heating chamber 83 Dust collector 84 Induction fan 85 Chimney 90 Shaft type melting furnace 91 Dust supply device 92 Gas Supply nozzle S1 Column spacing S10 Column spacing S2 Row spacing S20 Row spacing St Stroke D Dust

Claims (1)

燃焼ガスを通過させる空気加熱室内に多数の熱交換管が一定の縦列間隔及び一定の横列間隔で配管された配管群が設けられ、この配管群を構成する各熱交換管内に流通させた空気を前記燃焼ガスの熱により加熱させるようにした空気加熱装置において、
前記配管群の上方及び下方に設けられた上側支持枠及び下側支持枠と、
前記上側支持枠及び下側支持枠に上端及び下端が連結された状態で、前記配管群の縦列間隔内を上下方向に通した複数の垂直部材と、
前記複数の垂直部材に支持された状態で、前記配管群の横列間隔内を熱交換管の延長方向と直交する方向に通した水平部材と、
前記上側支持枠及び下側支持枠を熱交換管の延長方向に往復移動させることで、垂直部材及び水平部材を熱交換管の延長方向に往復移動させる往復駆動手段を備え、
前記空気加熱室内に複数の配管群が上下方向に複数段に設けられ、この複数群の配管群には、上下に隣接すると共に、縦列間隔が異なるように形成された少なくとも2段の配管群を含み、
この上下に隣接すると共に、縦列間隔が異なるように形成された少なくとも2段の配管群には、各配管群の縦列間隔内を上下方向に通るように垂直部材が設けられると共に、各配管群の垂直部材が各配管群の間に設けた中間支持枠を介して連結されていることを特徴とする空気加熱装置における除塵装置。
A group of pipes in which a large number of heat exchange pipes are piped at a constant column interval and a constant row interval are provided in an air heating chamber through which the combustion gas passes, and the air circulated in each heat exchange pipe constituting the pipe group In the air heating apparatus that is heated by the heat of the combustion gas,
An upper support frame and a lower support frame provided above and below the piping group;
With the upper and lower support frames connected to the upper and lower ends, a plurality of vertical members passing in the vertical direction within the column interval of the pipe group,
A horizontal member that is supported by the plurality of vertical members and that passes through a row interval of the pipe group in a direction orthogonal to the extension direction of the heat exchange tubes;
Reciprocating drive means for reciprocating the vertical member and the horizontal member in the extending direction of the heat exchange tube by reciprocating the upper support frame and the lower support frame in the extending direction of the heat exchange tube,
In the air heating chamber, a plurality of piping groups are provided in a plurality of stages in the vertical direction. The plurality of piping groups include at least two piping groups that are adjacent to each other in the vertical direction and have different column intervals. Including
At least two stages of pipe groups that are adjacent to each other in the vertical direction and have different column intervals are provided with vertical members so as to pass in the vertical direction within the column intervals of the respective pipe groups. A dust removing device in an air heating device, wherein the vertical members are connected via an intermediate support frame provided between the pipe groups .
JP2002356783A 2002-12-09 2002-12-09 Dust remover in air heater Expired - Fee Related JP3878543B2 (en)

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