JP2012092874A - Structure with curved protector - Google Patents
Structure with curved protector Download PDFInfo
- Publication number
- JP2012092874A JP2012092874A JP2010239294A JP2010239294A JP2012092874A JP 2012092874 A JP2012092874 A JP 2012092874A JP 2010239294 A JP2010239294 A JP 2010239294A JP 2010239294 A JP2010239294 A JP 2010239294A JP 2012092874 A JP2012092874 A JP 2012092874A
- Authority
- JP
- Japan
- Prior art keywords
- particles
- wear
- protector
- bending member
- bending
- 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
Abstract
Description
本発明は、プロテクターとして湾曲部材を備えた、ダクト等の構造物及びその磨耗防止方法に関する The present invention relates to a structure such as a duct having a curved member as a protector and a method for preventing wear thereof.
ボイラー等の配管には灰や砂等の微粒子を含むガスが通過するため、その曲がり部等において配管磨耗が生じやすい。
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）保護部を覆うコーティング又は板を取り付ける方法、及び（３）保護部のガス上流側に衝立として板（プロテクター）を取り付ける方法の大きく３つに分類される。
Since gas containing fine particles such as ash and sand passes through piping such as boilers, piping wear tends to occur at the bent portions.
As measures for preventing wear due to gas containing fine particles, (1) a method of making the main body itself a wear-resistant material, (2) a method of attaching a coating or a plate covering the protective part, and (3) a gas upstream side of the protective part There are roughly three methods for attaching plates (protectors) as screens.
（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、特に設置済の設備を変更する場合は撤去費用がかか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 there is a disadvantage that removal costs are required particularly when the installed equipment is changed.
（２）保護部表面を覆うコーティング又は板を取り付ける方法としては、耐摩耗金属溶射及びライニング等が挙げられる（例えば特許文献１，２）。設置済の設備を変更する場合、一般的に（１）の方法よりも安価となる。しかし、使用環境により、金属溶射皮膜又はコーティング材の剥離が短周期で起こる場合はコスト増となる。また、保護部表面に耐摩耗性材料等の板を取り付ける方法では、本体重量の増加が制約となるケースがある。 (2) Examples of a method for attaching a coating or a plate covering the surface of the protective part include wear-resistant metal spraying and lining (for example, Patent Documents 1 and 2). When changing the installed equipment, it is generally cheaper than the method (1). However, when the metal sprayed coating or coating material peels off in a short cycle depending on the use environment, the cost increases. In addition, in the method of attaching a plate made of an abrasion resistant material or the like to the protective part surface, there are cases where an increase in the weight of the main body becomes a limitation.
（３）保護部に衝立を設ける方法として、特許文献３の方法が挙げられる。特許文献３では、三角錐状突起物の下流に渦を発生させ、保護部への微粒子の接触を防止して摩耗防止を図っている。
ダクト又は配管の曲がり部等において衝立を立てる方法は、保護部全面に板を取り付ける場合と比較して、曲がり部上流に衝立として板を取り付けることで、少ない材料で広範囲の保護が図れる特徴がある。
しかし、プロテクターそのものが摩耗するため、プロテクターを耐摩耗性材料とするか、摩耗の度に取り替える等の措置が必要になりコスト増となる。
(3) The method of patent document 3 is mentioned as a method of providing a partition in a protection part. In Patent Document 3, a vortex is generated downstream of the triangular pyramidal projection to prevent contact of the fine particles with the protective portion, thereby preventing wear.
Compared with the case where a plate is attached to the entire surface of the protective part, the method of setting a partition in the bent part of the duct or piping has a feature that a wide range of protection can be achieved with a small amount of material by attaching a plate as a partition upstream of the bent part. .
However, since the protector itself is worn out, it is necessary to take measures such as making the protector wear-resistant material or replacing the protector every time it is worn.
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、
湾曲部材が、湾曲部の内側が前記流体の上流を向くように内壁に設けられた構造物。
２．前記粒子が灰粒子及び砂粒子であり、前記流体が気体であり、ダクト又は配管である請求項１に記載の構造物。
３．粒子を含む流体が内部を通過する構造物において、湾曲部材を、湾曲部の内側が前記流体の上流を向くように内壁に設ける磨耗防止方法。
According to the present invention, the following structures and the like are provided.
1. A structure through which fluid containing particles passes;
A structure in which the bending member is provided on the inner wall so that the inside of the bending portion faces the upstream of the fluid.
2. The structure according to claim 1, wherein the particles are ash particles and sand particles, the fluid is a gas, and is a duct or a pipe.
3. In a structure in which a fluid containing particles passes inside, a wear preventing method for providing a bending member on an inner wall so that the inside of the bending portion faces the upstream side of the fluid.
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を提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the protector which continues a 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、湾曲部材（プロテクター）が、湾曲部の内側（凹部）が流体の上流を向くように設けられている。
本発明の構造物は、好ましくは、ボイラー等の設備に用いるダクト又は配管である。例えばボイラー排ガスシステムの配管である。この配管は、ボイラー、特に流動層ボイラー等で生じた排気ガスを外部に排出するためのものであり、通常１以上の曲がり部がある。
The structure of the present invention is a structure through which a fluid containing particles passes, and the bending member (protector) is provided so that the inner side (concave portion) of the bending portion faces the upstream of the fluid.
The structure of the present invention is preferably a duct or piping used for equipment such as a boiler. For example, piping for boiler exhaust gas systems. This pipe is for exhausting exhaust gas generated by a boiler, particularly a fluidized bed boiler, etc., and usually has one or more bent portions.
図１は湾曲部材が設けられた曲がり部の断面図である。
排気ガス１００には灰や砂等の粒子が含まれ、これら粒子が曲がり部１０や内部構造物３０の摩耗の原因となる。
内部構造物としては入槽用ラダー、温度計突起部、整流板、旋回羽根、ノズル、梁等が挙げられる。
曲がり部１０の手前（上流側）には、湾曲部材２０が設けられている。湾曲部材２０は、湾曲部の内側が排気ガス流の上流部を向くように、配管の内壁に沿って設けられている。
湾曲部材２０を設けることにより、曲がり部１０、内部構造物３０の摩耗を防ぐことができる。
FIG. 1 is a cross-sectional view of a bent portion provided with a bending member.
The exhaust gas 100 contains particles such as ash and sand, and these particles cause wear of the bent portion 10 and the internal structure 30.
Examples of the internal structure include a tank ladder, a thermometer projection, a current plate, a swirl vane, a nozzle, and a beam.
A bending member 20 is provided in front (upstream side) of the bent portion 10. The bending member 20 is provided along the inner wall of the pipe so that the inside of the bending portion faces the upstream portion of the exhaust gas flow.
By providing the bending member 20, wear of the bent portion 10 and the internal structure 30 can be prevented.
湾曲部材２０の周辺の拡大図を図２に示す。
図２に示す湾曲部材２０の高さＨは、好ましくは３．４〜１１．４ｃｍ、より好ましくは６．０〜９．０ｃｍである。この程度の高さで効果的に摩耗を防げる。
An enlarged view of the periphery of the bending member 20 is shown in FIG.
The height H of the bending member 20 shown in FIG. 2 is preferably 3.4 to 11.4 cm, and more preferably 6.0 to 9.0 cm. Wear at this height can be effectively prevented.
尚、微粒子２００の粒径は、例えば、微粒子２００が灰の場合には２０μｍ以上、砂の場合には粒径２００μｍ以上である。このような微粒子に対し、上記の湾曲部材２０を効果的に用いることができる。 The particle size of the fine particles 200 is, for example, 20 μm or more when the fine particles 200 are ash, and 200 μm or more when the particles 200 are sand. The bending member 20 can be effectively used for such fine particles.
微粒子２００から延びる矢印は、微粒子２００の進行方向を示す。湾曲部材２０があることにより、微粒子２００が曲がり部１０に直接衝突することを回避できる。通常曲がり部１０は接合部１１，１２を有する多角型であるが、接合部を有さない形状でもよい。特に接合部が摩耗しやすいが、湾曲部材２０によりその摩耗を防げる。また、摩耗を受けやすい段差３０の内部構造物等も、その上流部に湾曲部材２０があることにより摩耗から守られる。 An arrow extending from the fine particle 200 indicates the traveling direction of the fine particle 200. The presence of the bending member 20 can prevent the fine particles 200 from directly colliding with the bent portion 10. Normally, the bent portion 10 is a polygonal shape having the joint portions 11 and 12, but may be a shape having no joint portion. In particular, the joint is easily worn, but the curved member 20 can prevent the wear. Further, the internal structure of the step 30 that is susceptible to wear is also protected from wear by the presence of the curved member 20 at the upstream portion thereof.
即ち、湾曲部材２０を設けると、保護対象となる曲がり部及び内部構造物（保護部）から微粒子が遠ざけられ、また、保護部周辺のガス流速が低下する。従って、プロテクター自身が摩耗してなくならない限り、保護対象の摩耗防止効果を維持できる。 That is, when the bending member 20 is provided, the fine particles are moved away from the bent portion and the internal structure (protective portion) to be protected, and the gas flow velocity around the protective portion is reduced. Therefore, as long as the protector itself is not worn away, it is possible to maintain the wear prevention effect of the protection target.
プロテクターは長期間排気ガスを受けることにより、プロテクター自体が摩耗して小さくなるか消滅する。しかし、本発明において、プロテクターとして湾曲部材２０を用いることで、湾曲部材２０自体の摩耗を防止することも可能となる。湾曲部材２０の湾曲部付近においては、微粒子２００が湾曲形状に沿ってガス１００の方向と逆向きに流れるため、湾曲部材２０への微粒子２００の衝突速度が緩和されるためである。 When the protector receives exhaust gas for a long period of time, the protector itself becomes worn and becomes smaller or disappears. However, in the present invention, by using the bending member 20 as a protector, it is possible to prevent the bending member 20 itself from being worn. This is because in the vicinity of the curved portion of the bending member 20, the fine particles 200 flow in the direction opposite to the direction of the gas 100 along the curved shape, so that the collision speed of the fine particles 200 with the bending member 20 is reduced.
図１におけるＡ−Ａ線断面図を図３に示す。
図３から分かるように、湾曲部材２０は配管の内壁において、半周（１８０°）に亘って取り付けられている。このように取付けることによって、摩耗の生じやすい部分を効果的に保護することができる。湾曲部材２０の内壁周囲に沿う長さは、好ましくは９０〜１８０°、より好ましくは１８０°〜３６０°である。
また、湾曲部材２０の数に制限はないが、例えば１つの曲がり部１０に３〜５個設けることができる。図４Ａに、１つの曲がり部に湾曲部材を複数設けたダクトの一例を示す。図４Ｂはこのダクトを上方から見た図である。
A cross-sectional view taken along line AA in FIG. 1 is shown in FIG.
As can be seen from FIG. 3, the bending member 20 is attached over a half circumference (180 °) on the inner wall of the pipe. By attaching in this way, it is possible to effectively protect the portion where wear easily occurs. The length along the circumference of the inner wall of the bending member 20 is preferably 90 to 180 °, more preferably 180 ° to 360 °.
Moreover, although there is no restriction | limiting in the number of the bending members 20, 3-5 can be provided in the one bending part 10, for example. FIG. 4A shows an example of a duct in which a plurality of bending members are provided at one bent portion. FIG. 4B is a view of this duct as viewed from above.
湾曲部材と保護部の距離は適宜設定できるが通常５０〜２００ｃｍである。 The distance between the bending member and the protection part can be set as appropriate, but is usually 50 to 200 cm.
湾曲部材２０の作成方法としては、平板を曲げ加工する、市販の配管を長手方向に半割りする方法等が挙げられるが、配管を半割りにする方法が安価で加工も容易である。 Examples of a method for creating the bending member 20 include a method of bending a flat plate, and a method of halving a commercially available pipe in the longitudinal direction, but a method of halving the pipe is inexpensive and easy to process.
湾曲部材の大きさと形は本発明の効果が得られれば特に限定されないが、中心角９０°〜１８０°の円弧状板が好ましく、典型的には断面が円である管を縦方向に２等分した半円状板（半割管）である。また、真円に限らず楕円の一部の円弧でもよい。湾曲部材の形状の一例を図５に示す。
後述するように、半円以下の曲率でも微粒子の衝突速度は低下するが、配管を半割りにした半円形状が適している。
The size and shape of the bending member are not particularly limited as long as the effects of the present invention can be obtained. However, an arc-shaped plate having a central angle of 90 ° to 180 ° is preferable. This is a divided semicircular plate (half pipe). Moreover, not only a perfect circle but a partial arc of an ellipse may be used. An example of the shape of the bending member is shown in FIG.
As will be described later, although the collision speed of the fine particles is reduced even with a curvature less than a semicircle, a semicircular shape with a pipe divided in half is suitable.
湾曲部材２０の材料は、配管の摩耗を防止できると共に湾曲部材自体の摩耗も防止できることから安価な炭素鋼が好ましい。
湾曲部材２０の配管への取り付けは、通常溶接にて行う。
The material of the bending member 20 is preferably inexpensive carbon steel because it can prevent the piping from being worn and the bending member itself.
The bending member 20 is attached to the pipe by ordinary welding.
実施例１
流動層ボイラーの排気ダクト（直径約３ｍ）（実機）の、曲がり部等摩耗から保護すべき箇所に、炭素鋼（ＳＳ４００）からなる半割管を内側が上流を向けて設置した。半割管は高さが設置場所、範囲等を考慮して、２１ｍｍ（１／２Ｂ）〜１６５ｍｍ（６Ｂ）のものを使用した。
特に、曲がり部には、図４Ａに示すように、３個の湾曲部材（半割管）を２〜４メートル間隔で設けた。半割管の高さは、主に６０ｍｍ（２Ｂ）又は８９ｍｍ（３Ｂ）であった。このように半割管を取付けることで、半割管の下流３０〜４０ｃｍに発生していた摩耗を防止できた。
Example 1
A half pipe made of carbon steel (SS400) was installed with the inner side facing upstream in a place to be protected from wear such as a bent portion of an exhaust duct (diameter: about 3 m) (actual machine) of a fluidized bed boiler. The half pipes with a height of 21 mm (1 / 2B) to 165 mm (6B) were used in consideration of the installation location, range, and the like.
In particular, as shown in FIG. 4A, the bending portion was provided with three bending members (half pipes) at intervals of 2 to 4 meters. The height of the half pipe was mainly 60 mm (2B) or 89 mm (3B). By attaching the half pipe in this way, it was possible to prevent wear that occurred 30 to 40 cm downstream of the half pipe.
上記の実機を５年以上運転した。この間、半割管は、排気ダクトの摩耗を防ぎ、かつ、使用開始から５年経過しても目視点検にて半割管自体に摩耗は発生しなかった。 The above-mentioned actual machine was operated for more than 5 years. During this time, the half pipe prevented wear of the exhaust duct, and even after five years from the start of use, the half pipe itself was not worn by visual inspection.
比較として、半割管の代わりに高さ６ｃｍの平板（炭素鋼（ＳＳ４００））を用いた他は実施例１と同様にして実機を実際に運転した。
平板は上端部から摩耗し、使用開始から１〜２年で先端から３ｃｍ（約５０％）が摩耗し消滅し、平板の取替が必要となった。
For comparison, the actual machine was actually operated in the same manner as in Example 1 except that a 6 cm high flat plate (carbon steel (SS400)) was used instead of the half pipe.
The flat plate was worn from the upper end, and 3 cm (about 50%) from the tip was worn and disappeared in 1 to 2 years from the start of use, and it was necessary to replace the flat plate.
このように、湾曲したプロテクターを内側が上流を向くように設けるという簡単な構成で、配管の摩耗を防ぎながら、プロテクター自体も摩耗し難く、驚くほど長期間使用できることが分かった。 Thus, it was found that the protector itself is not easily worn while preventing the wear of the pipe with a simple configuration in which the curved protector is provided so that the inner side faces the upstream, and it can be used surprisingly for a long time.
解析例１
半割管と平板の磨耗メカニズムをコンピュータシミュレーションにより解析した。
図６（ａ），（ｂ）に示すように、直径３ｍ、長さ５ｍの円管の中央に、半割管と平板を設置し、以下の条件で、空気流動場における粒子の運動状態を解析した。
流体密度：０．８３４ｋｇ／ｍ３、流体粘度：２．９１×１０−４Ｐａ・ｓ、
平均流速：１３ｍ／ｓ
Analysis example 1
The wear mechanism of half pipe and flat plate was analyzed by computer simulation.
As shown in FIGS. 6 (a) and 6 (b), a half tube and a flat plate are installed in the center of a 3m diameter and 5m long tube, and the motion state of particles in the air flow field is as follows. Analyzed.
Fluid density: 0.834 kg / m 3 , Fluid viscosity: 2.91 × 10 −4 Pa · s,
Average flow velocity: 13m / s
また、図６（ｃ），（ｄ）に示すように、プロテクター（半割管と平板）からの水平距離１０００ｍｍ、壁面からの高さ２５ｍｍの位置から、プロテクターに粒子（粒径：５０μｍ、粒子密度：８００ｋｇ／ｍ３、粒子形状：真球と仮定）を発射するという状態を解析した。半割管及び平板の高さは６０ｍｍとした。
解析した結果、図６（ｃ）に示すように、半割管に衝突したガスは、半割管の曲がりに沿って本来のガスの流れ方向と逆向きに流れた。半割管の上部への粒子の衝突速度は平板で１０ｍ／ｓであったのが、半割り管で約１／３の３ｍ／ｓまで低下した。
Further, as shown in FIGS. 6 (c) and 6 (d), particles (particle size: 50 μm, particles) are placed on the protector from a position at a horizontal distance of 1000 mm from the protector (half pipe and flat plate) and a height of 25 mm from the wall surface. The state of firing a density of 800 kg / m 3 and a particle shape assuming a true sphere was analyzed. The height of the half pipe and the flat plate was 60 mm.
As a result of the analysis, as shown in FIG. 6C, the gas that collided with the half pipe flowed in the opposite direction of the original gas flow along the bend of the half pipe. The impact velocity of the particles on the upper part of the half pipe was 10 m / s for the flat plate, but decreased to about 1/3 of 3 m / s for the half pipe.
以上から、平板型プロテクターでは、上部に粒子が大きな速度で衝突し摩耗しやすいが、半割管では、上部への粒子の衝突衝撃が減じられていて、そのため半割管は平板に比べ摩耗しにくいことが分かった。 From the above, in the flat plate protector, the particles collide with the upper part at a high speed and wear easily, but in the half pipe, the impact impact of the particles on the upper part is reduced, so the half pipe wears out compared with the flat plate. I found it difficult.
解析例２
プロテクターの曲率の違いによるガス流速、粒子の衝突速度をコンピュータシミュレーションにより解析した。
図７（ａ），（ｂ），（ｃ）の右側に示すように、高さ８９ｍｍの平板、楕円管、半割管に、粒子を含むガス流を１３ｍ／ｓで当てるという状態を解析した。粒子の密度は８００ｋｇ／ｍ３、粒径は５０μｍ、粒子形状は真球とした。
Analysis example 2
The gas flow velocity and particle collision velocity due to the difference in the curvature of the protector were analyzed by computer simulation.
As shown on the right side of FIGS. 7 (a), 7 (b), and 7 (c), a state in which a gas flow containing particles was applied at 13 m / s to a flat plate, an elliptic tube, and a half tube having a height of 89 mm was analyzed. . The density of the particles was 800 kg / m 3 , the particle size was 50 μm, and the particle shape was a true sphere.
衝突速度の解析結果を図７（ａ），（ｂ），（ｃ）の左側に示す。図７（ｂ），（ｃ）に示すように、楕円管と半割管においては、上部に本来のガスの流れ方向と逆向きの領域が認められ、これにより粒子の衝突速度が低下した。粒子の衝突直前速度は、平板で８ｍ／ｓ、楕円管で５ｍ／ｓ、半割管で４ｍ／ｓであった。曲率があれば一定のプロテクター自体の摩耗防止効果があるが、曲率が高い方が効果が高いことが示された。 The analysis results of the collision speed are shown on the left side of FIGS. 7 (a), (b), and (c). As shown in FIGS. 7B and 7C, in the elliptical tube and the half-divided tube, a region opposite to the original gas flow direction was observed in the upper part, and the collision speed of the particles was thereby reduced. The velocity immediately before the collision of the particles was 8 m / s for the flat plate, 5 m / s for the elliptic tube, and 4 m / s for the half tube. It was shown that if there is curvature, the protector itself has an effect of preventing wear, but the higher the curvature, the higher the effect.
解析例３
プロテクターによる粒子軌道の影響をコンピュータシミュレーションにより解析した。
図４Ａ，４Ｂに示した曲がり部における、粒子軌道の解析結果を図４Ｃに示す。流動層ボイラーから排出された燃焼ガスに含まれた灰及び砂粒子は、ダクト入口より流入し、特に粒子径の大きい砂粒子を主体とした粒子は、曲がり部外周部へと集中して流れる。
半割管に衝突した粒子は、図４Ｃに示すように内周側に進路を変更した。半割管１本で曲がり部全域に対して粒子の接触を防止していることが分かった。尚、解析条件は以下の通りとした。
粒子密度：８００ｋｇ／ｍ３、粒径：２１７μｍ（砂平均粒径）、ダクト径：３０００ｍｍ、ガス平均流速：１３ｍ／ｓ、粒子形状：真球と仮定
Analysis example 3
The influence of the particle trajectory by the protector was analyzed by computer simulation.
FIG. 4C shows the analysis result of the particle trajectory in the bent portion shown in FIGS. 4A and 4B. The ash and sand particles contained in the combustion gas discharged from the fluidized bed boiler flow in from the duct inlet, and particularly particles mainly composed of sand particles having a large particle diameter flow concentrically to the outer periphery of the bent portion.
Particles that collided with the half pipe changed their course to the inner circumference as shown in FIG. 4C. It was found that one half-split tube prevented the particles from contacting the entire bent portion. The analysis conditions were as follows.
Particle density: 800 kg / m 3 , particle size: 217 μm (sand average particle size), duct diameter: 3000 mm, gas average flow velocity: 13 m / s, particle shape: assumed to be a true sphere
このように半割管は、保護対象である曲がり部への粒子の接触を防止し、摩耗を抑制し、さらに半割管下流において、外周部の流速が低下することで粒子の衝突エネルギーが低下することにより、ダクト磨耗を抑制することが分かった。 In this way, the half pipe prevents contact of the particles with the bent part to be protected, suppresses wear, and further reduces the collision energy of the particles by reducing the flow velocity of the outer peripheral part downstream of the half pipe. By doing so, it was found that duct wear was suppressed.
本発明の湾曲プロテクターは摩耗防止のためにボイラー等の配管に用いることができる。 The curved protector of the present invention can be used for piping such as boilers to prevent wear.
１０ 曲がり部
１１，１２ 接合部
２０ 湾曲部材
３０ 段差
１００ 流体
２００ 微粒子
DESCRIPTION OF SYMBOLS 10 Bending part 11,12 Joint part 20 Bending member 30 Level difference 100 Fluid 200 Fine particle
Claims (3)
湾曲部材が、湾曲部の内側が前記流体の上流を向くように内壁に設けられた構造物。 A structure through which fluid containing particles passes;
A structure in which the bending member is provided on the inner wall so that the inside of the bending portion faces the upstream of the fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010239294A JP5773614B2 (en) | 2010-10-26 | 2010-10-26 | Structure with curved protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010239294A JP5773614B2 (en) | 2010-10-26 | 2010-10-26 | Structure with curved protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2012092874A true JP2012092874A (en) | 2012-05-17 |
| JP5773614B2 JP5773614B2 (en) | 2015-09-02 |
Family
ID=46386434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2010239294A Active JP5773614B2 (en) | 2010-10-26 | 2010-10-26 | Structure with curved protector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5773614B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014066352A (en) * | 2012-09-27 | 2014-04-17 | Idemitsu Kosan Co Ltd | Structure with tabular protector or l-shaped protector |
| JP2017134963A (en) * | 2016-01-27 | 2017-08-03 | トヨタ自動車株式会社 | Fuel cell system |
| JP2018096679A (en) * | 2016-12-14 | 2018-06-21 | Ｊｆｅスチール株式会社 | Duct |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2829841A1 (en) * | 1978-07-07 | 1980-01-24 | Walther & Cie Ag | Duct for abrasive dust-laden gas - has bottom wall covered by layer of coarse-grained material such as loosely distributed gravel |
| JPS59129388A (en) * | 1983-01-12 | 1984-07-25 | Ishikawajima Harima Heavy Ind Co Ltd | Fluidized bed type heat exchanger |
| US4641864A (en) * | 1984-02-16 | 1987-02-10 | R & H Technologies, Inc. | Wear resistant pipe bend for slurry transport |
| JPS62170490U (en) * | 1986-04-16 | 1987-10-29 |
-
2010
- 2010-10-26 JP JP2010239294A patent/JP5773614B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2829841A1 (en) * | 1978-07-07 | 1980-01-24 | Walther & Cie Ag | Duct for abrasive dust-laden gas - has bottom wall covered by layer of coarse-grained material such as loosely distributed gravel |
| JPS59129388A (en) * | 1983-01-12 | 1984-07-25 | Ishikawajima Harima Heavy Ind Co Ltd | Fluidized bed type heat exchanger |
| US4641864A (en) * | 1984-02-16 | 1987-02-10 | R & H Technologies, Inc. | Wear resistant pipe bend for slurry transport |
| JPS62170490U (en) * | 1986-04-16 | 1987-10-29 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014066352A (en) * | 2012-09-27 | 2014-04-17 | Idemitsu Kosan Co Ltd | Structure with tabular protector or l-shaped protector |
| JP2017134963A (en) * | 2016-01-27 | 2017-08-03 | トヨタ自動車株式会社 | Fuel cell system |
| JP2018096679A (en) * | 2016-12-14 | 2018-06-21 | Ｊｆｅスチール株式会社 | Duct |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5773614B2 (en) | 2015-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4621953A (en) | Anti-erosion protrusions for wear surfaces in fluid conduits | |
| JP5773614B2 (en) | Structure with curved protector | |
| CN105492826B (en) | Pipeline wall structure | |
| US9857077B2 (en) | Coal rope distributor with replaceable wear components | |
| KR102126663B1 (en) | Exhaust gas treatment device | |
| JP3209608U (en) | Powder transport tube | |
| JP2018096588A (en) | Boiler, boiler assembling method, and flow regulating member installation method | |
| JP5868722B2 (en) | Flare equipment and dust reduction method thereof | |
| JP6043563B2 (en) | Structure with flat plate protector or L-shaped protector | |
| JP6353185B2 (en) | Structure with heat exchange piping with protector | |
| CA2860818C (en) | Fuel head assembly with replaceable wear components | |
| JP6401812B2 (en) | Structure with heat exchange piping with protector | |
| CN107631117A (en) | Unloading can formula abrasion-resistant elbow | |
| JP5129604B2 (en) | Circulating fluidized bed combustion furnace | |
| RU80915U1 (en) | PIPELINE BEND FOR TRANSPORT OF DUSTY MATERIALS | |
| Kim et al. | Wastage rate of water walls in a commercial circulating fluidized bed combustor | |
| JP2004028430A (en) | Circulating fluidized bed boiler | |
| US10258923B2 (en) | Systems and methods for catalyst screens in selective catalytic reduction reactors | |
| JP6845711B2 (en) | Boiler duct structure, method for reducing solid particles contained in boiler and solid gas two-phase flow | |
| JP2011017529A (en) | Lance pipe | |
| JP2020101308A (en) | Chute section protective device, and chute section of fluidized bed boiler | |
| JP6284653B2 (en) | Burner nozzle tip | |
| CN213900273U (en) | Steel wear-resistant elbow with built-in multilayer guide plates for dust removal pipeline | |
| CN208901373U (en) | Monowall tube and fin panel casing for fluidized-bed combustion boiler | |
| JP6614230B2 (en) | duct |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20131017 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20140711 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20140729 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20140926 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20150303 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20150327 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20150623 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20150630 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5773614 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |