JP6401812B2 - Structure with heat exchange piping with protector - Google Patents
Structure with heat exchange piping with protector Download PDFInfo
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- JP6401812B2 JP6401812B2 JP2017053616A JP2017053616A JP6401812B2 JP 6401812 B2 JP6401812 B2 JP 6401812B2 JP 2017053616 A JP2017053616 A JP 2017053616A JP 2017053616 A JP2017053616 A JP 2017053616A JP 6401812 B2 JP6401812 B2 JP 6401812B2
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Description
本発明は、プロテクターを有する熱交換配管を備えた、ボイラの熱交換部等の構造物に関する。 The present invention relates to a structure such as a heat exchange section of a boiler, which includes a heat exchange pipe having a protector.
石油や石炭等の燃料を燃焼させる設備では、当該燃料の燃焼によって灰が発生する。この灰が、設備内の熱交換配管の伝熱面に付着すると、当該熱交換配管の熱交換効率が低下する問題がある。
この問題に対しては、熱交換配管の伝熱面に圧縮空気や水蒸気等の気体を噴きつけ、灰を落とす煤吹装置（スーツブロー）をさらに設けることで解決することができる。
In equipment for burning fuel such as oil and coal, ash is generated by the combustion of the fuel. When this ash adheres to the heat transfer surface of the heat exchange pipe in the facility, there is a problem that the heat exchange efficiency of the heat exchange pipe is lowered.
This problem can be solved by further providing a soot blower (suit blow) that blows a gas such as compressed air or water vapor onto the heat transfer surface of the heat exchange pipe to drop the ash.
スーツブローによって熱交換効率の低下は防げるものの、ボイラ等の燃焼設備内は、灰、砂等の微粒子を含むガスが常に循環しており、当該微粒子がスーツブローの噴きつける気体によって熱交換配管にぶつかり、配管摩耗させる問題が生じる。特に大型ボイラの場合、摩耗した熱交換配管の交換は、膨大なコストを必要とするため、当該摩耗をできる限り抑制することが求められていた。 Although the reduction of heat exchange efficiency can be prevented by suit blow, gas containing fine particles such as ash and sand is constantly circulating in combustion equipment such as boilers, and the fine particles blow into the heat exchange pipe by the gas blown by suit blow. The problem of colliding and pipe wear occurs. In particular, in the case of a large boiler, replacement of a worn heat exchange pipe requires enormous costs, so that it has been required to suppress the wear as much as possible.
微粒子を含むガスによる磨耗防止対策としては、（１）本体そのものを耐摩耗性材料とする方法、（２）保護部表面にコーティングして保護する方法、及び（３）熱交換配管に円環上のカバーを被せ配管の肉厚を増す方法の大きく３つに分類される。 As countermeasures against wear caused by gas containing fine particles, (1) a method of making the main body itself wear-resistant material, (2) a method of coating and protecting the surface of the protection part, and (3) an annular ring on the heat exchange pipe There are three main methods for increasing the wall thickness of the pipes.
（１）本体そのものをステンレス等の耐摩耗性材料とする方法では、本体全域の摩耗を防止又は軽減されるため、状況によってはメンテナンスフリーとなり得る。しかし、一般に耐摩耗性材料は高価であり、熱交換配管の本数も多大な数量であることからコストが莫大となるという欠点がある。 (1) In the method in which the main body itself is made of an abrasion-resistant material such as stainless steel, the wear of the entire main body is prevented or reduced, so that it can be maintenance-free depending on the situation. However, in general, wear-resistant materials are expensive, and the number of heat exchange pipes is large, so that there is a disadvantage that the cost is enormous.
（２）保護部表面にコーティングして保護する方法としては、耐摩耗金属溶射、ライニング等が挙げられる。しかしながら、設置済の設備を変更する場合、配管隙間が通常は数ｃｍ以下であることから、当該方法の適用は困難である。また、大型のボイラである場合、熱交換配管の本数が膨大であることから多大なコストを必要とする。 (2) Examples of the method of coating and protecting the surface of the protective part include wear-resistant metal spraying and lining. However, when the installed equipment is changed, since the piping gap is usually several cm or less, it is difficult to apply the method. Moreover, since it is a large sized boiler, since the number of heat exchange piping is enormous, a great cost is required.
（３）熱交換配管に円環上のカバーを被せ配管の肉厚を増す方法（特許文献１）であっても、熱交換配管の本数が多大であることからコストが問題となる。また、このようなプロテクターをとりつけても、スーツブロー上流側に近く設置された熱交換配管の摩耗は激しく、効果が長く持続しないという問題があった。 (3) Even in the method (Patent Document 1) in which the cover on the ring is covered with the heat exchange pipe and the thickness of the pipe is increased (Patent Document 1), the number of the heat exchange pipes is large, so the cost becomes a problem. Moreover, even if such a protector is attached, there is a problem in that the heat exchange pipe installed near the upstream side of the suit blow is severely worn and the effect does not last long.
本発明の目的は、安価で簡単な構造で摩耗防止効果を長期間継続するプロテクターを提供することである。 An object of the present invention is to provide a protector that has a wear prevention effect for a long period of time with an inexpensive and simple structure.
本発明によれば、以下の構造物等が提供される。
１．粒子を含む流体が内部を通過する構造物であって、
複数の熱交換配管を、前記流体の流動方向に対して垂直方向に一定間隔で離隔して設置してなる熱交換配管群と、前記熱交換配管群の伝熱面に気体を噴き付けるスーツブローを備え、
前記熱交換配管が、前記スーツブローから噴きつける気体を受ける面にそれぞれプロテクターを有する構造物。
２．粒子を含む流体が内部を通過する構造物であって、
複数の熱交換配管を、前記流体の流動方向に対して垂直方向に一定間隔で離隔して設置してなる熱交換配管群と、前記熱交換配管群の伝熱面に気体を噴き付けるスーツブローを備え、
前記熱交換配管群が前記スーツブローを挟んで２つ形成されており、
流体の上流側の前記熱交換配管群の熱交換配管が、前記スーツブローから噴きつける気体を受ける面にそれぞれプロテクターを有する構造物。
３．前記プロテクターが、凹部が前記スーツブローに向いた湾曲部材、凹部が前記スーツブローに向いたＶ字部材、又は凹部が前記スーツブローに向いたコの字部材である１又は２に記載の構造物。
４．前記粒子が灰粒子及び／又は砂粒子であり、前記流体が気体であって、ボイラの熱交換部である１〜３のいずれかに記載の構造物。
According to the present invention, the following structures and the like are provided.
1. A structure through which fluid containing particles passes;
A heat exchange pipe group in which a plurality of heat exchange pipes are installed at regular intervals in a direction perpendicular to the fluid flow direction, and a suit blow that blows gas onto the heat transfer surface of the heat exchange pipe group With
The structure which has a protector in the surface where the said heat exchange piping receives the gas which spouts from the said suit blow, respectively.
2. A structure through which fluid containing particles passes;
A heat exchange pipe group in which a plurality of heat exchange pipes are installed at regular intervals in a direction perpendicular to the fluid flow direction, and a suit blow that blows gas onto the heat transfer surface of the heat exchange pipe group With
Two heat exchange piping groups are formed across the suit blow,
The structure which has a protector in the surface where the heat exchange piping of the said heat exchange piping group of the upstream of the fluid receives the gas which sprays from the said suit blow, respectively.
3. The structure according to 1 or 2, wherein the protector is a curved member whose concave portion faces the suit blow, a V-shaped member whose concave portion faces the suit blow, or a U-shaped member whose concave portion faces the suit blow. .
4). The structure according to any one of 1 to 3, wherein the particles are ash particles and / or sand particles, the fluid is a gas, and is a heat exchange part of a boiler.
本発明によれば、安価で簡単な構造で摩耗防止効果を長期間継続するプロテクターが提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the protector which continues the wear prevention effect for a long period of time with an inexpensive and simple structure can be provided.
本発明の構造物は、粒子を含む流体が内部を通過する構造物であって、複数の熱交換配管を、流体の流動方向に対して垂直方向に一定間隔で離隔して設置してある熱交換配管群と、熱交換配管群の伝熱面に気体を噴き付けるスーツブローを備え、熱交換配管が、スーツブローから噴きつける気体（スーツブローガス）を受ける面にそれぞれプロテクターを有する。
本発明の構造物は、好ましくはボイラ（循環流動層ボイラ、微粉炭ボイラ等）、燃焼炉、焼却炉等の熱交換配管のスーツブロー部（熱交換配管のスーツブローガスを受ける部分）である。
The structure of the present invention is a structure through which a fluid containing particles passes, and a plurality of heat exchange pipes are installed at regular intervals in a direction perpendicular to the fluid flow direction. The exchange pipe group and a suit blow for injecting a gas to the heat transfer surface of the heat exchange pipe group are provided, and the heat exchange pipe has a protector on a surface for receiving the gas (suit blow gas) to be injected from the suit blow.
The structure of the present invention is preferably a suit blow part of a heat exchange pipe (a part receiving the suit blow gas of the heat exchange pipe) such as a boiler (circulating fluidized bed boiler, pulverized coal boiler, etc.), a combustion furnace, an incinerator, or the like. .
本発明の構造物中は、粒子を含む流体が内部を通過しているが、当該流体は好ましくは気体である。
また、流体中の粒子は、例えば灰粒子や砂粒子が含まれる。粒子が灰（石炭灰）である場合、粒径は例えば５〜６０μm程度であり、粒子が砂の場合は粒径は例えば１００μｍ以上である。
In the structure of the present invention, a fluid containing particles passes through the inside, and the fluid is preferably a gas.
The particles in the fluid include, for example, ash particles and sand particles. When the particles are ash (coal ash), the particle size is, for example, about 5 to 60 μm, and when the particles are sand, the particle size is, for example, 100 μm or more.
図１は、本発明の一実施形態を示す図である。
図１において、複数の熱交換配管１０は、流体の流動方向に対して垂直方向に１列に配され、さらに当該列を流体の流動方向に複数配して熱交換配管群を形成している。熱交換配管群は、スーツブロー３０を間に介して２つ形成されており、これら２つの熱交換配管群について、スーツブロー３０に面する２列の熱交換配管はプロテクター２０を有する。
２つの熱交換配管群に挟まれた円筒状のスーツブロー３０は、その円筒の先端部分に噴射口を有しており、当該噴射口からスーツブローガスを噴き付け、熱交換配管１０の伝熱面に付着した汚れを落とす機能を有する。また、スーツブロー３０は、配管自体が回転しながら熱交換配管群の間を熱交換配管の列に沿って（図１の左右方向）に移動することもできる。
本発明の構造物では、熱交換配管にプロテクターを設けることによって、スーツブローの熱交換配管の汚れを落とす機能を低下させることなく、熱交換配管の摩耗を防ぐことができる。また、プロテクター自体の摩耗も小さいため、長期間（例えば数年）熱交換配管の摩耗防止効果を維持することができる。
FIG. 1 is a diagram showing an embodiment of the present invention.
In FIG. 1, a plurality of heat exchange pipes 10 are arranged in one row in a direction perpendicular to the fluid flow direction, and a plurality of the rows are arranged in the fluid flow direction to form a heat exchange pipe group. . Two heat exchange pipe groups are formed with the suit blow 30 interposed therebetween, and for these two heat exchange pipe groups, the two rows of heat exchange pipes facing the suit blow 30 have protectors 20.
A cylindrical suit blow 30 sandwiched between two heat exchange pipe groups has an injection port at the tip of the cylinder, and a suit blow gas is injected from the injection port to transfer heat from the heat exchange pipe 10. Has the function of removing dirt adhering to the surface. Moreover, the suit blow 30 can also move between the heat exchange pipe groups along the row of the heat exchange pipes (the left-right direction in FIG. 1) while the pipes themselves rotate.
In the structure of the present invention, by providing a protector on the heat exchange pipe, wear of the heat exchange pipe can be prevented without deteriorating the function of removing dirt from the heat exchange pipe of the suit blow. Further, since the wear of the protector itself is small, the effect of preventing wear of the heat exchange pipe can be maintained for a long period (for example, several years).
図１が示すように、プロテクター２０を有する熱交換配管１０は、スーツブロー３０に面する熱交換配管だけでよい。また、図２が示すように、スーツブロー３０に面する１列目及び２列目まででもよい。
このように構造物中の熱交換配管は、全てがプロテクターを有する必要はなく、スーツブローのスーツブローガスが強く当たる部分にのみプロテクターを設けるだけでよい。
As shown in FIG. 1, the heat exchange pipe 10 having the protector 20 may be only the heat exchange pipe facing the suit blow 30. Further, as shown in FIG. 2, the first and second rows facing the suit blow 30 may be used.
Thus, it is not necessary for all the heat exchange pipes in the structure to have a protector, and it is only necessary to provide a protector only at a portion of the suit blow where the suit blow gas is strongly hit.
図３は、本発明の他の実施形態を示す図である。
図３の構造物では、２つの熱交換配管群のうちの流体流動方向の上流側の熱交換配管群であって、スーツブロー３０に面する１列の熱交換配管のみがプロテクター２０を有する。
その他、複数の熱交換配管１０が、流体の流動方向に対して垂直方向に１列に配され、さらに当該列を流体の流動方向に複数配して熱交換配管群を形成しており、２つの熱交換配管群に円筒状のスーツブロー３０が挟まれていることは図１と同じである。
FIG. 3 is a diagram showing another embodiment of the present invention.
In the structure of FIG. 3, only one row of heat exchange pipes facing the suit blow 30 has the protector 20, which is the upstream heat exchange pipe group in the fluid flow direction of the two heat exchange pipe groups.
In addition, a plurality of heat exchange pipes 10 are arranged in one row in the direction perpendicular to the fluid flow direction, and a plurality of the rows are arranged in the fluid flow direction to form a heat exchange pipe group. The cylindrical suit blow 30 is sandwiched between two heat exchange pipe groups as in FIG.
２つの熱交換配管群のうち、流体の流動方向の下流側の熱交換配管群は、流動方向上流側の熱交換配管に比べ、流体自体の流動によって伝熱面に汚れが溜まりにくい傾向にある。従って、スーツブローガスによる汚れ除去も大きな風圧を必要とせず、流動方向上流側の熱交換配管群に比べ、スーツブローとの距離を長くとることができる。長く距離をとることにより、スーツブローガスによる熱交換配管の摩耗を低減することができ、プロテクターの設置を省略することができる。 Of the two heat exchange pipe groups, the heat exchange pipe group on the downstream side in the fluid flow direction tends to be less likely to accumulate dirt on the heat transfer surface due to the flow of the fluid itself than the heat exchange pipe on the upstream side in the flow direction. . Accordingly, the removal of dirt by the suit blow gas does not require a large wind pressure, and the distance from the suit blow can be made longer than the heat exchange pipe group on the upstream side in the flow direction. By taking a long distance, it is possible to reduce the wear of the heat exchange piping due to the suit blow gas, and the installation of the protector can be omitted.
図４はプロテクターが設けられた熱交換配管の斜視図及び概略断面図である。
図４に示すように、プロテクターは熱交換配管の延伸方向に沿って設けられており、配管をスーツブローのスーツブローガスから保護している。熱交換配管に設けられるプロテクターは、好ましくは湾曲部材（図４の半円）、Ｖ字部材、及びコの字部材のいずれかである。プロテクターが湾曲部材、Ｖ字部材及びコの字部材である場合、これらの凹部がスーツブローに向くように設ける。また、プロテクターがＶ字部材及びコの字部材である場合、先端が内側に屈曲していてもよい。
FIG. 4 is a perspective view and a schematic sectional view of a heat exchange pipe provided with a protector.
As shown in FIG. 4, the protector is provided along the extending direction of the heat exchange pipe and protects the pipe from the suit blow gas of the suit blow. The protector provided in the heat exchange pipe is preferably one of a curved member (semicircle in FIG. 4), a V-shaped member, and a U-shaped member. When a protector is a curved member, a V-shaped member, and a U-shaped member, these recessed parts are provided so as to face suit blow. Moreover, when a protector is a V-shaped member and a U-shaped member, the front-end | tip may be bent inside.
熱交換配管に設けられるプロテクターは、平板でもよいが、プロテクターが平板である場合、プロテクター自体の摩耗が大きく、プロテクターの交換頻度が高くなって、コストが上昇するおそれがある。一方、プロテクターが上記Ｖ字部材、湾曲部材、コの字部材である場合、プロテクター自体の摩耗が小さく、プロテクターの交換頻度を低くすることができ、コストを抑えることができる。
特にＶ字部材及び湾曲部材であれば、Ｖ字部材は平板を２枚張り合わせることで製造でき、湾曲部材は円筒部材を２つに分割することで製造できることから、製造が容易であるため、コスト面からプロテクターとして特に好ましい。また、市販のＬ字部材をそのまま使用することも可能でありコストを抑えることができる。
The protector provided in the heat exchange pipe may be a flat plate, but when the protector is a flat plate, the protector itself is greatly worn, the frequency of replacement of the protector increases, and the cost may increase. On the other hand, when a protector is the said V-shaped member, a curved member, and a U-shaped member, wear of protector itself is small, the replacement frequency of a protector can be made low, and cost can be held down.
In particular, if it is a V-shaped member and a curved member, the V-shaped member can be manufactured by laminating two flat plates, and since the curved member can be manufactured by dividing the cylindrical member into two, the manufacturing is easy. Particularly preferred as a protector from the viewpoint of cost. Moreover, it is also possible to use a commercially available L-shaped member as it is, and cost can be suppressed.
プロテクターは、好ましくはその端部に堰を有する。
図５は、プロテクターがＶ字部材である場合の、堰を有するプロテクターの斜視図である。尚、図５では堰は片方の端部のみに配されているが、好ましくは両端部に堰を有する。
プロテクターがその端部に堰を有することで、流体中に含まれる粒子が当該端部から漏れ出て、熱交換配管や、その周辺部に衝突して浸食することを防ぐことができる。
The protector preferably has a weir at its end.
FIG. 5 is a perspective view of a protector having a weir when the protector is a V-shaped member. In FIG. 5, the weir is arranged only at one end, but preferably has a weir at both ends.
By having a weir at the end of the protector, it is possible to prevent particles contained in the fluid from leaking out from the end and colliding with and eroding the heat exchanging pipe and its peripheral part.
プロテクターの構成材料は、設置場所によって適宜選択すればよく、例えば循環流動層ボイラの熱交換配管である場合、プロテクターの材料として、雰囲気ガス温度に耐えるステンレス鋼が選択でき、炭素鋼のような安価な材料であっても十分な熱交換配管の摩耗防止効果が得られる。 The material of the protector may be appropriately selected depending on the installation location. For example, when the heat exchange pipe of the circulating fluidized bed boiler is selected, stainless steel that can withstand the atmospheric gas temperature can be selected as the protector material, and it is inexpensive as carbon steel. Even if it is a simple material, sufficient wear prevention effect of the heat exchange pipe can be obtained.
図６は、プロテクターが設けられた熱交換配管の断面図である。
プロテクターの幅は、好ましくは配管の外径の０．９〜１．１倍である。また、プロテクターの高さは、好ましくは配管の管径（内径）０．５倍〜１．１倍である。
例えば図６が示すように、Ｖ字部材を備える熱交換配管の外径が０．０５ｍの場合、当該Ｖ字部材の高さは０．０３５ｍであり、Ｖ字部材の幅は０．０５ｍである
尚、コスト低減と交換容易化のため、図６に示すように、プロテクターの熱交換配管への設置は、例えば熱交換配管に半割り管プロテクター（半円状プロテクター）をバンド巻固定して、溶接することで取付け固定するとよい。この場合であっても、好ましいプロテクター幅及び高さ等に変化はない。
FIG. 6 is a cross-sectional view of a heat exchange pipe provided with a protector.
The width of the protector is preferably 0.9 to 1.1 times the outer diameter of the pipe. The height of the protector is preferably 0.5 to 1.1 times the pipe diameter (inner diameter) of the pipe.
For example, as FIG. 6 shows, when the outer diameter of the heat exchange pipe provided with the V-shaped member is 0.05 m, the height of the V-shaped member is 0.035 m, and the width of the V-shaped member is 0.05 m. In order to reduce costs and facilitate replacement, as shown in FIG. 6, the protector is installed on the heat exchange pipe by, for example, fixing a half-pipe protector (semi-circular protector) to the heat exchange pipe with a band. It is good to fix it by welding. Even in this case, there is no change in preferred protector width and height.
実施例１
本発明のプロテクターの摩耗防止効果を確認するため、以下に示す解析を行った。
流動解析ソフトＦｌｕｅｎｔ（フルエント）（アンシス・ジャパン株式会社製）を用いて、図７に示すスーツブロー部について、ＬＥＳ（Ｌａｒｇｅ Ｅｄｄｙ Ｓｉｍｕｌａｔｉｏｎ）による流動及び粒子追跡衝突解析を行い、熱交換配管及びプロテクターの摩耗を解析した。尚、図７は、スーツブロー部の熱交換配管がプロテクターを有さない場合を示す。
具体的には、以下の条件を設定し、それぞれ解析した。得られた結果を図８に示す。
Example 1
In order to confirm the wear prevention effect of the protector of the present invention, the following analysis was performed.
Using the flow analysis software Fluent (manufactured by Ansys Japan Co., Ltd.), the flow and particle tracking collision analysis by LES (Large Eddy Simulation) is performed on the suit blow part shown in FIG. Wear was analyzed. In addition, FIG. 7 shows the case where the heat exchange piping of a suit blow part does not have a protector.
Specifically, the following conditions were set and analyzed. The obtained result is shown in FIG.
［解析条件］
スーツブローガス流速：６０ｍ／ｓ
ガス密度：０．８３４ｋｇ／ｍ３
粘度：０．０００２９１Ｐａ・ｓ、
粒子密度：８００ｋｇ／ｍ３
粒子流量：０．１ｋｇ／ｓ
粒子径：１０μｍ
摩耗計測時間：０．１〜１．１ｓｅｃの１秒間計測
（摩耗計測時間＝粒子飛散時間）
[Analysis conditions]
Suit blow gas flow velocity: 60m / s
Gas density: 0.834 kg / m 3
Viscosity: 0.000291 Pa · s,
Particle density: 800 kg / m 3
Particle flow rate: 0.1 kg / s
Particle size: 10 μm
Wear measurement time: 0.1 second to 1.1 second measurement (wear measurement time = particle scattering time)
図８に示すように、摩耗の最大値はプロテクター無しに比べ、半円、Ｖ字、コの字、先端が内側に屈曲のいずれのプロテクターともに１／２〜１／３となった。また、摩耗を面積で合計した値（積分値）は半円に比べＶ字、コの字、先端が内側に屈曲した形状では２〜５割小さい値であり、より摩耗が少なくなっていることが分かった。 As shown in FIG. 8, the maximum value of wear was 1/2 to 1/3 for all protectors with semicircle, V-shape, U-shape, and tip bent inward, compared to the case without a protector. Also, the total wear value (integrated value) by area is 20-50% smaller for V-shaped, U-shaped, and tip bent inward than semi-circle, and wear is reduced. I understood.
実施例２
熱交換配管が有するプロテクターの端部に堰を有する場合の、当該堰の効果を確認する解析を行った。
流動解析ソフトＦｌｕｅｎｔ（フルエント）を用いて、図９に示すスーツブロー部について、ＬＥＳ（Ｌａｒｇｅ Ｅｄｄｙ Ｓｉｍｕｌａｔｉｏｎ）による流動及び粒子追跡衝突解析を行い、プロテクター端部近傍の熱交配管及び側壁面の摩耗度合いを解析した。図９のスーツブロー部の熱交換配管は、一方の端部に堰を有し、他方の端部が堰を有さないＶ字部材からなるプロテクターである。
具体的には、以下の条件を設定し、それぞれ解析した。得られた結果を図１０に示す。
Example 2
An analysis was conducted to confirm the effect of the weir when the end of the protector included in the heat exchange pipe has a weir.
Using the flow analysis software Fluent, flow and particle tracking collision analysis by LES (Large Eddy Simulation) is performed on the suit blow part shown in FIG. 9, and the degree of wear of the heat exchange pipe and the side wall surface near the end of the protector Was analyzed. The heat exchange pipe of the suit blow part in FIG. 9 is a protector made of a V-shaped member having a weir at one end and the other end not having a weir.
Specifically, the following conditions were set and analyzed. The obtained result is shown in FIG.
［解析条件］
ガス流速：１００ｍ／ｓ
ガス密度：０．８３４ｋｇ／ｍ３
粘度：０．０００２９１Ｐａ・ｓ
粒子密度：８００ｋｇ／ｍ３
粒子流量：０．０５ｋｇ／ｓ
粒子径：５０μｍ
粒子飛散時間：０．１〜１．１ｓｅｃの１秒間計測
[Analysis conditions]
Gas flow rate: 100m / s
Gas density: 0.834 kg / m 3
Viscosity: 0.000291 Pa · s
Particle density: 800 kg / m 3
Particle flow rate: 0.05kg / s
Particle size: 50 μm
Particle scattering time: 0.1 second to 1.1 second measurement for 1 second
熱交換配管が有するプロテクターの端部に堰がある場合は、熱交換配管が有するプロテクターの端部に堰が無い場合に比べ、プロテクター端部周辺の熱交配管及び側壁面の摩耗は１／１０以下になった。 When there is a weir at the end of the protector that the heat exchange pipe has, compared to the case where there is no weir at the end of the protector that the heat exchange pipe has, the wear of the heat exchange pipe and the side wall surface around the protector end is 1/10. It became the following.
実施例３
図１１に示すように、図３と同様の熱交換配管群及びスーツブローを備えるスーツブロー部を備える循環流動床ボイラを運用した結果、当該熱交換配管群は、プロテクターを有さない熱交換配管群に比べ、１列目及び２列目以降の熱交換配管の摩耗を防止することができた。
また、熱交換配管群が有するＶ字部材プロテクター自体も摩耗が少なく長く防護効果が続き、当該プロテクターの交換は、１０年以上に渡って不要であった。
Example 3
As shown in FIG. 11, as a result of operating a circulating fluidized bed boiler including a heat exchange pipe group similar to FIG. 3 and a suit blow unit equipped with a suit blow, the heat exchange pipe group is a heat exchange pipe having no protector. Compared with the group, it was possible to prevent wear of the heat exchange pipes in the first row and the second row.
In addition, the V-shaped member protector itself of the heat exchange piping group has little wear and the protective effect has continued for a long time, and replacement of the protector has not been necessary for more than 10 years.
本発明のプロテクターは、摩耗防止のためにボイラ等の配管に用いることができる。 The protector of this invention can be used for piping, such as a boiler, for abrasion prevention.
１０ 熱交換配管
２０ プロテクター
３０ スーツブロー
10 Heat exchange piping 20 Protector 30 Suit blow
Claims (7)
複数の熱交換配管を、前記流体の流動方向に対して垂直方向に一定間隔で離隔して設置してなる熱交換配管群と、前記熱交換配管群の伝熱面に気体を噴き付けるスーツブローを備え、
前記熱交換配管が、前記スーツブローから噴きつける気体を受ける面にそれぞれプロテクターを有し、
前記プロテクターが、凹部が前記スーツブローに向いた湾曲部材、凹部が前記スーツブローに向いたＶ字部材、又は凹部が前記スーツブローに向いたコの字部材であり、
前記プロテクターが、ステンレス鋼又は炭素鋼からなる構造物。 A structure through which fluid containing particles passes;
A heat exchange pipe group in which a plurality of heat exchange pipes are installed at regular intervals in a direction perpendicular to the fluid flow direction, and a suit blow that blows gas onto the heat transfer surface of the heat exchange pipe group With
The heat exchange pipe, have a respective protector surface receiving the gas sprayed from the suit blow,
The protector is a curved member whose concave portion faces the suit blow, a V-shaped member whose concave portion faces the suit blow, or a U-shaped member whose concave portion faces the suit blow,
A structure in which the protector is made of stainless steel or carbon steel .
複数の熱交換配管を、前記流体の流動方向に対して垂直方向に一定間隔で離隔して設置してなる熱交換配管群と、前記熱交換配管群の伝熱面に気体を噴き付けるスーツブローを備え、
前記熱交換配管群が前記スーツブローを挟んで２つ形成されており、
流体の上流側の前記熱交換配管群の熱交換配管が、前記スーツブローから噴きつける気体を受ける面にそれぞれプロテクターを有し、
前記プロテクターが、凹部が前記スーツブローに向いた湾曲部材、凹部が前記スーツブローに向いたＶ字部材、又は凹部が前記スーツブローに向いたコの字部材であり、
前記プロテクターが、ステンレス鋼又は炭素鋼からなる構造物。 A structure through which fluid containing particles passes;
A heat exchange pipe group in which a plurality of heat exchange pipes are installed at regular intervals in a direction perpendicular to the fluid flow direction, and a suit blow that blows gas onto the heat transfer surface of the heat exchange pipe group With
Two heat exchange piping groups are formed across the suit blow,
Upstream of the heat exchanger pipe group heat exchange pipe of the fluid, have a respective protector surface receiving the gas sprayed from the suit blow,
The protector is a curved member whose concave portion faces the suit blow, a V-shaped member whose concave portion faces the suit blow, or a U-shaped member whose concave portion faces the suit blow,
A structure in which the protector is made of stainless steel or carbon steel .
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