JPH08597Y2 - Soot blow device - Google Patents
Soot blow deviceInfo
- Publication number
- JPH08597Y2 JPH08597Y2 JP6267890U JP6267890U JPH08597Y2 JP H08597 Y2 JPH08597 Y2 JP H08597Y2 JP 6267890 U JP6267890 U JP 6267890U JP 6267890 U JP6267890 U JP 6267890U JP H08597 Y2 JPH08597 Y2 JP H08597Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- steam
- supply pipe
- diffuser
- steam supply
- 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.)
- Expired - Lifetime
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Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案はボイラ排ガスの脱硝設備の触媒部、または、
ボイラや空気予熱器等の伝熱管等の伝熱部等への灰の付
着や堆積を防止するスートブロー装置に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention is directed to a catalyst part of a denitration equipment for boiler exhaust gas, or
The present invention relates to a soot blow device that prevents ash from adhering to or depositing on a heat transfer portion such as a heat transfer tube of a boiler or an air preheater.
従来から例えばボイラ排ガスの脱硝設備の触媒部への
灰の付着や堆積を防止するスートブロー装置は、脱硝設
備容器の内部において、中央に位置する蒸気供給管とこ
の蒸気供給管から分岐して取付けられ下方に小口径の蒸
気噴出口を多数有する散気管からなる管体をボイラの燃
焼排ガスの流れ方向とほぼ直交する面内で往復動可能に
設け、散気管の蒸気噴出口から蒸気をブローさせて被洗
浄物である脱硝触媒へ吹き付けて該触媒上に付着したり
堆積したりする灰（燃焼灰）や未燃カーボンを除去する
ことにより触媒表面を洗浄するようにしている。Conventionally, for example, a soot-blowing device that prevents ash from adhering to and depositing on the catalyst portion of a denitration equipment for boiler exhaust gas is installed inside the denitration equipment container by branching from the steam supply pipe located at the center and this steam supply pipe. A tube consisting of diffuser tubes with many small-diameter steam outlets is provided so as to be able to reciprocate in a plane substantially orthogonal to the flow direction of the combustion exhaust gas of the boiler, and steam is blown from the steam outlets of the diffuser tubes. The catalyst surface is cleaned by removing ash (combustion ash) and unburned carbon that are sprayed onto the denitration catalyst, which is the object to be cleaned, to adhere or deposit on the catalyst.
〔考案が解決しようとする課題〕 しかし、スートブロー作動初期においては、脱硝設備
容器の外部に位置する蒸気供給管が冷やされており、供
給される蒸気と相当な温度差があるため蒸気が冷やされ
てドレン（凝縮水）が発生し、このドレンが蒸気と共に
中央の蒸気供給管を通ってそのまま散気管内へ流入しそ
の蒸気噴出口から噴出されて触媒等の被洗浄物に当たっ
たり、吹き付けられたりして、被洗浄物の摩耗や腐食を
引き起こしていた。[Problems to be solved by the invention] However, in the early stage of soot blow operation, the steam supply pipe located outside the denitration equipment container is cooled, and the steam is cooled because there is a considerable temperature difference with the supplied steam. Drain (condensed water) is generated, and this drain flows directly into the diffuser pipe along with the steam through the central steam supply pipe and is ejected from the steam ejection port to hit or be sprayed on the object to be cleaned such as the catalyst. As a result, the object to be cleaned is abraded and corroded.
本考案はこのような問題点に鑑みてなされたものであ
り、ドレンをスートブロー装置から効果的に抜き出して
被洗浄物に当てないようにして被洗浄物の摩耗や腐食を
防止し、被洗浄物の脱硝触媒作用等、本来の作用を有効
に行わせるようにすることを目的とするものである。The present invention has been made in view of the above problems, and prevents drainage and corrosion of an object to be cleaned by effectively draining the drain from the soot-blowing device and not hitting the object to be cleaned. The purpose of the present invention is to effectively perform the original functions such as the denitration catalytic effect of the above.
本考案の粉粒体輸送装置は、上記目的を達成するため
に、 中央に位置する蒸気供給管とこの蒸気供給管から分岐
して取付けられ下方に小口径の蒸気噴出口を多数有する
散気管からなる管体を燃焼排ガスの流れ方向とほぼ直交
する面内で往復動可能に設け、散気管の蒸気噴出口から
蒸気をブローさせて被洗浄物を洗浄するようにしたスー
トブロー装置において、前記蒸気供給管の末端部の散気
管が分岐する部分の蒸気供給管の断面を含む面内に位置
させて管体に凝縮水排出用の小孔を設け、この小孔を囲
むようにして管体の外側に凝縮水の衝突板を設け、この
衝突板は散気管外面との間で散気管の軸線方向に向けて
開口を形成した構成にしたものである。In order to achieve the above object, the powdery- or granular-material transporting device of the present invention comprises a steam supply pipe located at the center and an air diffuser pipe branching from the steam supply pipe and having a large number of small-sized steam outlets below. In the soot-blowing device in which the pipe body is provided so as to reciprocate in a plane substantially orthogonal to the flow direction of the combustion exhaust gas and the vapor is blown from the vapor jet port of the diffuser pipe to wash the object to be washed, A small hole for discharging condensed water is provided in the pipe body by locating it in the plane including the cross section of the steam supply pipe at the part where the diffuser pipe at the end of the pipe branches, and condensing outside the pipe body so as to surround this small hole. A water impingement plate is provided, and the impingement plate has an opening formed in the axial direction of the air diffuser with the outer surface of the air diffuser.
スートブローの作動初期においてドレンは蒸気と共に
スートブロー装置の管体の蒸気供給管を通りその末端部
に至り、ここに設けられた凝縮水排出用の小孔から管体
外部へ排出される。排出されたドレンは衝突板に当たり
方向を転換されて衝突板と散気管に沿ってそれらの間に
形成された開口から排出される。しかして、ドレンは蒸
気に比べて重量が大きいため該蒸気供給管内を直進して
蒸気供給管の末端部まで至ると共に、途中で散気管には
入らず該凝縮水排出用の小孔から積極的に排出される。
なお、凝縮水排出用の小孔は散気管の蒸気噴出口の口径
よりも大きくしておけばたとえ蒸気供給管の末端部で分
岐する散気管内へドレンが入ったとしてもドレンが凝縮
水排出用の小孔から優先して排出される。In the initial stage of soot blow operation, the drain flows with steam through the steam supply pipe of the pipe body of the soot blow device to the end portion thereof, and is discharged to the outside of the pipe body through a small hole for discharging condensed water provided therein. The discharged drain hits the collision plate and is redirected to be discharged from the opening formed along the collision plate and the air diffuser between them. However, since the drain is heavier than steam, it goes straight through the steam supply pipe to the end of the steam supply pipe, and does not enter the diffuser pipe on the way, but positively flows through the small holes for discharging the condensed water. Is discharged to.
If the small hole for discharging condensed water is made larger than the diameter of the steam outlet of the diffuser pipe, the drain will discharge condensed water even if the drain enters the diffuser pipe branched at the end of the steam supply pipe. It is preferentially discharged from the small holes for use.
以下、図面に示す実施例を参照しながら、本考案を詳
細に説明する。Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.
第１図は本考案の実施例に係るスートブロー装置の平
面図、第２図は第１図の正面図、第３図は第１図のＰ部
拡大図、第４図は第３図のIV線矢視断面図である。FIG. 1 is a plan view of a soot-blowing apparatus according to an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is an enlarged view of P part of FIG. 1, and FIG. 4 is IV of FIG. FIG.
第１図および第２図に示すようにスートブロー装置１
は脱硝装置の容器10内に位置した管体４と容器10の外部
に位置した管体駆動部５により構成されている。管体４
は平面視で中央部に位置した蒸気供給管２とこの蒸気供
給管２の複数個所から分岐されて両側に延びた複数本の
散気管３から王字状に形成されて構成されており、この
管体10は散気管３の両端部を下方からレール６で摺動自
在に支持されている。散気管３の底部には多数の小口径
の蒸気噴出口７が形成されている。容器10の外部に位置
する管体駆動部５は管体４を容器10を横断する方向に、
即ち、燃焼ガスの流れ方向（第２図に符号Ａで示す）と
ほぼ直交する方向に往復動させるための作動を行う。こ
れにより管体４の下方に位置する触媒（被洗浄物）８に
均等に蒸気を吹き付け（第２図に符号Ｂで示す）、触媒
８上に付着したり堆積している石炭焚きボイラの燃焼ガ
スに含まれている灰や未燃分を均等に除去する。この駆
動部５には管体４の蒸気供給管２と連設される蒸気供給
源に通じる別の蒸気供給管2aが設けられている。As shown in FIGS. 1 and 2, the soot blow device 1
Is composed of a tube body 4 located inside the container 10 of the denitration device and a tube body drive unit 5 located outside the container 10. Tube 4
Is composed of a steam supply pipe 2 located in the central portion in a plan view and a plurality of diffusing pipes 3 branched from a plurality of places of the steam supply pipe 2 and extending to both sides in a royal shape. The tube body 10 is slidably supported on both ends of the air diffuser 3 from below by rails 6. A large number of small-diameter steam outlets 7 are formed at the bottom of the air diffuser 3. The tubular body driving unit 5 located outside the container 10 moves the tubular body 4 in a direction traversing the container 10,
That is, the operation for reciprocating in the direction substantially orthogonal to the flow direction of the combustion gas (indicated by symbol A in FIG. 2) is performed. As a result, the catalyst (cleaning object) 8 located below the pipe body 4 is sprayed with steam evenly (indicated by symbol B in FIG. 2), and the combustion of the coal-fired boiler adhering to or depositing on the catalyst 8 is burned. Remove ash and unburned matter contained in gas evenly. The drive unit 5 is provided with another steam supply pipe 2a communicating with a steam supply source connected to the steam supply pipe 2 of the pipe body 4.
しかして、第４図に詳細を示すように蒸気供給管２の
末端部の散気管３が分岐する位置の散気管３には蒸気供
給管２の断面を含む面内の散気管３の外側壁の下方側に
寄せた位置に凝縮水排出用の小孔11が設けられており、
散気管３の外側にはこの小孔11を囲むようにして断面コ
字状の凝縮水の衝突板12が散気管３に取付けられて設け
れている。この小孔11の取付位置は第４図に示すように
散気管３の断面の水平な中心線と垂直な水平線とが成す
90度の角度範囲α内、即ち散気管３の外側下半分、の壁
面とするのが望ましく、より好ましくは下方に下がった
位置が望ましい。本実施例ではα＝45°の位置に取付け
た場合を示している。小孔11の径は散気管３の蒸気噴出
口７よりも例えば２倍と大きくして形成するのが望まし
い。例えば第３図においてドレンが蒸気供給管２内を進
んで来てＴ型の分岐部で左右に分かれて散気管３内に進
入したとしても、凝縮水排出用の小孔11の径が散気管３
の該分岐部付近にある蒸気噴出口７の径よりも大きけれ
ば、ドレンは該凝縮水排出用の小孔11から優先して排出
されるからである。そしてこの衝突板12は散気管３の軸
線方向に所定の幅が持たされており、幅方向の両端部に
は散気管３外面との間で散気管３の軸線方向に向けて開
口13が形成されている。Therefore, as shown in detail in FIG. 4, the diffuser pipe 3 at the position where the diffuser pipe 3 at the end of the vapor supply pipe 2 branches off includes the inward plane outer wall of the diffuser pipe 3 including the cross section of the vapor supply pipe 2. A small hole 11 for discharging condensed water is provided at a position closer to the lower side of
A collision plate 12 of condensed water having a U-shaped cross section is attached to the diffusing pipe 3 outside the diffusing pipe 3 so as to surround the small hole 11. The mounting position of the small hole 11 is formed by a horizontal center line and a vertical horizontal line of the cross section of the air diffusing tube 3 as shown in FIG.
The wall surface is preferably within the angle range α of 90 degrees, that is, the outer lower half of the air diffusing tube 3, and more preferably, the position lowered downward is desirable. In this embodiment, the case where it is attached at a position of α = 45 ° is shown. It is desirable that the diameter of the small hole 11 is formed to be, for example, twice as large as that of the steam jet port 7 of the air diffuser 3. For example, in FIG. 3, even if the drain advances in the steam supply pipe 2 and splits into left and right at the T-shaped branch portion and enters the diffuser pipe 3, the diameter of the small hole 11 for discharging condensed water is equal to that of the diffuser pipe. Three
This is because the drain is preferentially discharged from the small hole 11 for discharging the condensed water if the diameter is larger than the diameter of the steam outlet 7 near the branch portion. The collision plate 12 has a predetermined width in the axial direction of the air diffusing tube 3, and an opening 13 is formed at both ends in the width direction between the outer surface of the air diffusing tube 3 and the axial direction of the air diffusing tube 3. Has been done.
このような構成において、容器10内には例えば温度32
0℃のボイラの燃焼排ガスが流れており、スートブロー
装置の管体４も同温度とされている。そして、スートブ
ロー運転の初期においては駆動部５の蒸気供給管2aの温
度は外気の温度と同じであるため、蒸気供給源の例えば
温度290℃、圧力15.5kg/cm2の過熱蒸気を供給した場
合、ここの駆動部５の蒸気供給管2aで過熱蒸気の一部が
冷やされて凝縮水（ドレン）になる。このため、スート
ブロー装置１の管体４の蒸気供給管２にドレンが蒸気と
共に導入されて蒸気供給管２内を直進して末端に至る。
なお、ドレンは蒸気よりも重量が大きいため蒸気供給管
２の途中から分岐した散気管３には入らず蒸気供給管２
内を直進すると共に、蒸気供給管２の底部分を走って進
む。蒸気供給管２の末端部には、蒸気供給管２の断面を
含む面内において散気管３の外側壁の下方側に寄せた位
置、即ち、蒸気供給管２の底部に寄った位置に凝縮水排
出用の小孔11が設けられているため、重量の大きい勢い
をもったドレンが小孔11からそのまま円滑に排出され
る。なお、このとき、凝縮水排出用の小孔11の径を散気
管３の蒸気噴出口７の径よりも大きくしておくことによ
り、ドレンがたとえ散気管３の方へ分岐して進入したと
しても該小孔11の方から蒸気噴出口７に優先して管外に
排出されることとなる。そして、第３図に示すように排
出されたドレンは衝突板12の内面に衝突して左右に分か
れ、散気管３に沿って流れて開口13から容器10内に排出
される。一方、ドレンを分離された蒸気は散気管３の多
数の蒸気噴出口７から下方向へ噴出されて、触媒８の表
面の灰や未燃カーボンを吹き飛ばす。なお、スートブロ
ー運転開始後、しばらくすると駆動部５の蒸気供給管2a
も温められてドレンの発生はなくなる。In such a configuration, the temperature in the container 10 is, for example, 32
The combustion exhaust gas of the boiler at 0 ° C is flowing, and the tube body 4 of the sootblowing device is also at the same temperature. Since the temperature of the steam supply pipe 2a of the drive unit 5 is the same as the temperature of the outside air in the early stage of the soot blow operation, for example, when superheated steam having a temperature of 290 ° C. and a pressure of 15.5 kg / cm 2 is supplied from the steam supply source. A part of the superheated steam is cooled in the steam supply pipe 2a of the drive unit 5 to be condensed water (drain). Therefore, drain is introduced into the steam supply pipe 2 of the tube body 4 of the soot blower 1 together with the steam, and goes straight inside the steam supply pipe 2 to reach the end.
Since the drain is heavier than steam, it does not enter the diffuser pipe 3 branched from the middle of the steam supply pipe 2 and the steam supply pipe 2
While going straight inside, it runs along the bottom portion of the steam supply pipe 2. At the end of the steam supply pipe 2, the condensed water is located at a position closer to the lower side of the outer wall of the diffuser pipe 3 in a plane including the cross section of the steam supply pipe 2, that is, at a position closer to the bottom of the steam supply pipe 2. Since the small hole 11 for discharging is provided, the drain having a large weight and momentum is smoothly discharged as it is from the small hole 11. At this time, by setting the diameter of the small hole 11 for discharging condensed water to be larger than the diameter of the steam jet port 7 of the air diffusing pipe 3, it is assumed that the drain branches into the air diffusing pipe 3 and enters. Also, the small holes 11 are discharged to the outside of the pipe in preference to the steam jet 7. Then, as shown in FIG. 3, the discharged drain collides with the inner surface of the collision plate 12 to be divided into right and left, flows along the air diffuser 3 and is discharged into the container 10 through the opening 13. On the other hand, the steam from which the drain has been separated is jetted downward from a large number of steam outlets 7 of the air diffuser 3 to blow off ash and unburned carbon on the surface of the catalyst 8. It should be noted that the steam supply pipe 2a of the drive unit 5 is a while after the start of the soot blow operation.
It is also warmed up and drainage disappears.
このように、ドレンは触媒８に当たることがなく、触
媒８の摩耗や腐食が防止される。In this way, the drain does not hit the catalyst 8 and wear and corrosion of the catalyst 8 are prevented.
以上の実施例では、凝縮水排出用の小孔11を１個のみ
設けた場合を示したが、本考案では蒸気噴出量を極力抑
えられる範囲で、比較的小径の複数の小孔を蒸気供給管
２の末端部の散気管３が分岐する部分の蒸気供給管２の
断面を含む面内に位置させて設けれこともできる。ま
た、被洗浄物が触媒である場合について説明したが、被
洗浄物がボイラ、灰熱回収装置または空気予熱器等の伝
熱管である場合等にも同様に適用できる。In the above embodiment, the case where only one small hole 11 for discharging condensed water is provided has been shown, but in the present invention, a plurality of small holes having a relatively small diameter are supplied within a range in which the amount of steam jetted can be suppressed as much as possible. It can also be provided so as to be located in the plane including the cross section of the steam supply pipe 2 at the portion where the air diffuser pipe 3 at the end of the pipe 2 branches. Further, the case where the object to be cleaned is a catalyst has been described, but the same can be applied to the case where the object to be cleaned is a heat transfer tube such as a boiler, an ash heat recovery device or an air preheater.
以上の説明から明らかなように、本考案のスートブロ
ー装置では、凝縮水を被洗浄物に当てずにすみ、被洗浄
物の摩耗や腐食を防止することができ、被洗浄物の本来
有する作用の例えば脱硝触媒作用や伝熱作用等を有効に
行わせることができるという実用的効果がある。As is clear from the above description, the soot-blowing device of the present invention does not need to apply condensed water to the object to be cleaned and can prevent abrasion and corrosion of the object to be cleaned. For example, there is a practical effect that the denitration catalytic action and the heat transfer action can be effectively performed.
図面は本考案の一実施例を示すものであり、第１図はス
ートブロー装置の平面図、第２図は第１図の正面図、第
３図は第１図のＰ部拡大図、第４図は第３図のIV矢視断
面図である。 １……スートブロー装置、２……蒸気供給管、３……散
気管、４……管体、５……管体駆動部、６……レール、
７……蒸気噴出口（散気管）、８……触媒（被洗浄
物）、10……容器（脱硝装置）、11……凝縮水排出用小
孔、12……衝突板、13……開口。The drawings show one embodiment of the present invention. FIG. 1 is a plan view of a soot-blowing device, FIG. 2 is a front view of FIG. 1, and FIG. 3 is an enlarged view of a P portion of FIG. The drawing is a sectional view taken along the line IV of FIG. 1 ... Soot blow device, 2 ... Steam supply pipe, 3 ... Air diffuser pipe, 4 ... Pipe body, 5 ... Pipe body drive part, 6 ... Rail,
7 ... Steam ejection port (air diffuser), 8 ... Catalyst (object to be cleaned), 10 ... Container (denitrification device), 11 ... Small hole for discharging condensed water, 12 ... Impacting plate, 13 ... Opening .
Claims (1)
管から分岐して取付けられ下方に小口径の蒸気噴出口を
多数有する散気管からなる管体を燃焼排ガスの流れ方向
とほぼ直交する面内で往復動可能に設け、散気管の蒸気
噴出口から蒸気をブローさせて被洗浄物を洗浄するよう
にしたスートブロー装置において、前記蒸気供給管の末
端部の散気管が分岐する部分の蒸気供給管の断面を含む
面内に位置させて管体に凝縮水排出用の小孔を設け、こ
の小孔を囲むようにして管体の外側に凝縮水の衝突板を
設け、この衝突板は散気管外面との間で散気管の軸線方
向に向けて開口を形成することを特徴とするスートブロ
ー装置。1. A pipe body comprising a steam supply pipe located at the center and a diffusing pipe which is attached so as to be branched from the steam supply pipe and which has a large number of steam outlets of a small diameter in the lower part thereof is substantially orthogonal to the flow direction of combustion exhaust gas. In a soot-blowing device that is capable of reciprocating in the plane and blows steam from the steam jet port of the diffuser pipe to wash the object to be cleaned, the vapor of the portion where the diffuser pipe at the end of the vapor supply pipe branches A small hole for discharging condensed water is provided in the pipe body in a plane including the cross section of the supply pipe, and a condensed water collision plate is provided outside the pipe body so as to surround the small hole. A soot blowing device, characterized in that an opening is formed between the outer surface and the air diffuser in the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6267890U JPH08597Y2 (en) | 1990-06-15 | 1990-06-15 | Soot blow device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6267890U JPH08597Y2 (en) | 1990-06-15 | 1990-06-15 | Soot blow device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0425937U JPH0425937U (en) | 1992-03-02 |
| JPH08597Y2 true JPH08597Y2 (en) | 1996-01-10 |
Family
ID=31592050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6267890U Expired - Lifetime JPH08597Y2 (en) | 1990-06-15 | 1990-06-15 | Soot blow device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08597Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5272111B1 (en) * | 2012-05-28 | 2013-08-28 | 三菱重工プラント建設株式会社 | Passage removal device and dust collection device |
| WO2014178337A1 (en) * | 2013-05-01 | 2014-11-06 | 東京博善株式会社 | Cremation system and cremation method |
| KR101387024B1 (en) * | 2013-11-25 | 2014-04-21 | 한모기술주식회사 | The combined cleaning system for hear exchanger |
-
1990
- 1990-06-15 JP JP6267890U patent/JPH08597Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0425937U (en) | 1992-03-02 |
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