JPS5941362Y2 - Forced circulation boiler - Google Patents

Description

【考案の詳細な説明】 この考案は水管を密着させて螺旋状に巻き、縦向きの筒
状とした内外２重の水管壁からなる強制循環型のボイラ
に関するものである。[Detailed description of the invention] This invention relates to a forced circulation boiler consisting of double walls of the water pipes, an inner and outer wall, formed into a vertically cylindrical shape, with water pipes tightly wound in a spiral shape.

従来のこの種のボイラは内外の水管壁を構成する水管が
上端から下端に至るまで全周に亘り密着しており、内側
の水管壁の内側に設けた火室に対してバーナかも吹き込
まれた燃焼ガスは内側の水管壁の下端の間隙から内外の
水管壁の間の筒状間隙内に流入してこれを上昇し、この
筒状間隙の上方の開口から出てい（ようになっている。In conventional boilers of this type, the water pipes that make up the inner and outer water pipe walls are in close contact with each other all the way from the top to the bottom, and the burner also blows into the firebox installed inside the inner water pipe wall. The combustion gas flows into the cylindrical gap between the inner and outer water tube walls from the gap at the lower end of the inner water tube wall, rises therein, and exits from the opening above the cylindrical gap. It has become.

上記のような従来のボイ２の構造では水管壁を構成する
水管が全周に亘って密着しているため、断面円形の上下
の水管の接触部に生ずる凹入部に対して燃焼ガスが上下
方向に流れるため、この凹入部がポケットとなって燃焼
ガスとの接触が妨げられ、熱効率が低下するという欠点
がある。In the conventional Boi 2 structure as described above, the water pipes that make up the water pipe wall are in close contact with each other over the entire circumference, so the combustion gas flows upward and downward against the recess that occurs at the contact area between the upper and lower water pipes, which have a circular cross section. Since the fuel flows in the same direction, the concave portion becomes a pocket and prevents contact with the combustion gas, resulting in a decrease in thermal efficiency.

また、縦方向の大小径の異なるパイプによる多数の螺旋
状水管を７重程度の同心に配置し、この各水管の隣接部
には多数の隔離片を介在させて隙間を形成し、上方のバ
ーナから吹込んだ燃焼ガスを各上下の水管の間から外部
へ流すようにしたボイラもあるが、このような従来型式
のボイ２は燃焼ガスが狭い間隙を横方向に流れて煙道へ
向かうノテ火室内が高圧となる。In addition, a large number of spiral water pipes made up of pipes of different sizes in the vertical direction are arranged concentrically in about 7 layers, and a number of isolation pieces are interposed between adjacent parts of each water pipe to form gaps, and the upper burner There are some boilers in which the combustion gas blown in from the boiler flows outward from between the upper and lower water pipes, but in this type of conventional boiler 2, the combustion gas flows laterally through a narrow gap and flows toward the flue. High pressure builds up inside the firebox.

このためバーナで発生させた燃焼ガスの押込み圧を相当
高くしなければならないので、バーナに附属した送風機
も高圧大馬力のものが必要となり、消費動力が大となる
とともに運転に伴う騒音も高くなり、間隙が狭いので煤
なども詰まり易く、詰まると火室内の圧がさらに上る。For this reason, the pressure of the combustion gas generated by the burner must be increased considerably, and the blower attached to the burner must also be of high pressure and high horsepower, which increases power consumption and increases noise during operation. Since the gap is narrow, it is easy for soot to get clogged, and if it gets clogged, the pressure inside the firebox will rise even more.

しかし、全周に亘り間隙があるため、掃除も極めて困難
であるなどの問題がある。However, since there are gaps around the entire circumference, there are problems such as cleaning is extremely difficult.

この考案は上記の問題を解決するため、内外２重の水管
壁を構成する水管の一部を内外方向に屈曲して上下の水
管の間に間隙を形成し、火室内の燃焼ガスが内側の水管
壁の途中から内外の水管壁の間の筒状間隙内に横方向か
ら流入して筒状間隙内を周方向に流れたのち外側の水管
壁の途中から外部へ流れ出るようにした熱効率のよいボ
イ２を提供するものである。This idea solves the above problem by bending a part of the water pipes that make up the double walls of the inner and outer water pipes in the inner and outer directions to form a gap between the upper and lower water pipes, so that the combustion gas inside the fire chamber can be The water flows laterally into the cylindrical gap between the inner and outer water pipe walls from the middle of the water pipe wall, flows circumferentially within the cylindrical gap, and then flows out from the middle of the outer water pipe wall. This provides a boiler 2 with high thermal efficiency.

以下にこの考案のボイ２の実施例を添附図面に基づいて
詳細に説明する。An embodiment of the body 2 of this invention will be described in detail below based on the accompanying drawings.

図において、１はボイラの外壁で、耐火材からなり、底
を有する縦向き円筒状の内張りの外側を鋼板により被っ
たもので、その中程の一部に排気口２が設けである。In the figure, reference numeral 1 denotes the outer wall of the boiler, which is made of refractory material, has a vertically oriented cylindrical lining with a bottom, and is covered with a steel plate on the outside, and an exhaust port 2 is provided in a part of the middle thereof.

Ａ、Ｂは内外２重の水管壁で、内側の水管壁Ａは水管３
を密着させて螺旋状に巻き、内側の水管壁Ａの排気口２
側において、上下に隣接する水管３を一つおきに内方へ
第２図のように屈曲して屈曲部４を形成し、この各屈曲
部４の上下に間隙５を形成する。A and B are double water pipe walls, inside and outside, and the inner water pipe wall A is water pipe 3.
Closely wrap it in a spiral shape and connect it to the exhaust port 2 of the inner water pipe wall A.
On the side, every other vertically adjacent water pipe 3 is bent inward as shown in FIG. 2 to form a bent part 4, and a gap 5 is formed above and below each bent part 4.

また、外側の水管壁Ｂの、排気口２と反対の側において
、上下に隣接する水管６を一つおきに内方へ第２図のよ
うに屈曲して屈曲部７を形成し、この各屈曲部７の上下
に間隙８を形成する。In addition, on the side of the outer water pipe wall B opposite to the exhaust port 2, every other vertically adjacent water pipe 6 is bent inward as shown in FIG. 2 to form a bent part 7. A gap 8 is formed above and below each bent portion 7.

なお、各水管壁Ａ、Ｂを構成する水管３，６は同径のも
のを用いている。Note that the water pipes 3 and 6 constituting each of the water pipe walls A and B have the same diameter.

また、外壁１の底部上には耐火材の層９を設けて、内側
の水管壁Ａ内の火室１０の底部を閉塞するとともに内外
の水管壁Ａ、Ｂ間の筒状間隙１１と外側の水管壁Ｂと外
壁１間の筒状間隙１２の下端も閉鎖する。A layer 9 of refractory material is provided on the bottom of the outer wall 1 to close the bottom of the firebox 10 in the inner water pipe wall A and to close the cylindrical gap 11 between the inner and outer water pipe walls A and B. The lower end of the cylindrical gap 12 between the outer water tube wall B and the outer wall 1 is also closed.

また、外壁１上の開口も、耐火材を鋼板で被った着脱自
在の頂蓋１３で閉鎖し、火室１０および筒状間隙１１．
１２の上端を閉鎖する。The opening on the outer wall 1 is also closed with a removable top cover 13 made of fireproof material covered with a steel plate, and the firebox 10 and the cylindrical gap 11.
Close the top end of 12.

１４は頂蓋１３の中央上部に固定したバーナで、その噴
出口１５は頂蓋１３の中央の開口から火室１０内に向け
る。A burner 14 is fixed to the upper center of the top cover 13, and its jet port 15 is directed into the firebox 10 from the opening in the center of the top cover 13.

１６はこの考案のボイラを支える脚１７を有する支持台
で、この台１６上にポンプ１８を設け、給水管１９かも
の水を送水管２０を経て各水管３゜６の下端に送水する
ようにし、各水管３，６の上端は排出管２１に連結する
。Reference numeral 16 denotes a support stand having legs 17 for supporting the boiler of this invention, and a pump 18 is installed on this stand 16 to send water from the water supply pipes 19 through water pipes 20 to the lower ends of each water pipe 3.6. , the upper end of each water pipe 3, 6 is connected to a discharge pipe 21.

この考案のボイラは上記の構造であり、ポ／１１８を運
転して給水管１９かも供給される水を各水管壁Ａ、Ｈの
下端へ供給するとともにバーナ１４を運転すると、水は
各水管３，６の下端に流入して水管３，６内を通過する
間に火室１０内に吹き込まれ、間隙５，８，１１．１２
を通過する燃焼ガスと熱交換し、高温の温水または蒸気
となって排出管２１から出ていく。The boiler of this invention has the above-mentioned structure, and when the port 118 is operated and the water supplied from the water supply pipe 19 is supplied to the lower end of each water pipe wall A, H, and the burner 14 is operated, the water is transferred to each water pipe. 3, 6 and is blown into the firebox 10 while passing through the water pipes 3, 6, and is blown into the gaps 5, 8, 11.12.
It exchanges heat with the combustion gas passing through, and exits from the exhaust pipe 21 as high-temperature hot water or steam.

また、暖房用のように温水または蒸気を循環させて使用
する場合は排出管２１から出て暖房機を通り、熱交換を
終って冷却した水を再び給水管１９に戻す。When hot water or steam is circulated and used for heating purposes, the water exits from the discharge pipe 21, passes through a heater, completes heat exchange, and returns the cooled water to the water supply pipe 19.

上記のような作用において、火室１０内の吹き込まれた
高温の燃焼ガスは内側の水管壁Ａに設けられた多数の間
隙５から内外の水管壁Ａ、Ｂ間の筒状間隙１１内に入り
、第２図の矢印のように左右に分れて間隙１１内を水平
に流れる。In the above action, the high-temperature combustion gas blown into the firebox 10 flows from the numerous gaps 5 provided in the inner water tube wall A into the cylindrical gap 11 between the inner and outer water tube walls A and B. It flows horizontally through the gap 11, dividing into left and right sides as shown by the arrows in FIG.

従って上下の水管３，６の隣接部に形成される凹所内に
も燃焼ガスが入り込んで旋回するので水管３，６内の水
と燃焼ガスとの熱交換が十分に行われる。Therefore, the combustion gas enters the recesses formed adjacent to the upper and lower water pipes 3 and 6 and swirls, so that heat exchange between the water in the water pipes 3 and 6 and the combustion gas is sufficiently performed.

その後さらに間隙８から、外側の水管壁Ｂの外側の間隙
１２に流れ出した燃焼ガスは水平に流れて水管６に十分
に接触しつつ排気口２かも出ていくのである。Thereafter, the combustion gas further flows out from the gap 8 into the gap 12 on the outside of the outer water tube wall B, flows horizontally, and comes into full contact with the water tube 6 while also exiting the exhaust port 2.

従って、全周に亘り上下の水管を密着させて螺旋状に巻
いて筒状とした２重の水管を用いる従来のボイラのよう
に上下方向に燃焼ガスが流れるものに比較して熱効率が
著しく向上する。Therefore, thermal efficiency is significantly improved compared to conventional boilers that use double water pipes that are wound spirally into a cylindrical shape, with the upper and lower water pipes in close contact with each other over the entire circumference, where combustion gas flows vertically. do.

また、上下の水管の間に隔離片を挾んで僅かな間隙を形
成しつつ螺旋状に巻いて筒状とした大小径の異なるパイ
プからなる多数の水管な７重程度の同心に配置した従来
のボイ２に比較しても、この考案のボイ２は屈曲部にお
ける間隙を十分に広くとれるので火室内の圧力は余り上
らない。In addition, the conventional method consists of a large number of water pipes, each consisting of pipes of different sizes and diameters, which are arranged concentrically in about 7 layers, with an isolation piece interposed between the upper and lower water pipes to form a small gap, and the pipes are spirally wound into a cylindrical shape. Even compared to Boi 2, the Boi 2 of this invention has a sufficiently wide gap at the bent portion, so the pressure inside the firebox does not increase much.

従ってバーナの送風圧力を余り高（する必要がないので
消費動力が少なく運転に伴う騒音も少ない。Therefore, there is no need to increase the blowing pressure of the burner, so the power consumption is low and the noise associated with operation is also low.

さらに水管の屈曲部により形成した間隙は相対向する個
所にそれぞれ縦方向に１列並んでいるだけであり、各間
隙は広いので煤が詰まり難く、詰まって掃除がし易いな
どの効果がある。Furthermore, the gaps formed by the bent portions of the water pipes are arranged in a single row in the vertical direction at opposite locations, and each gap is wide, so it is difficult to get clogged with soot and has the effect of being easy to clean if it becomes clogged.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案のボイラの縦断正面図、第２図は同上
の横断平面図である。 １・・・・・・外壁、２・・・・・・排気口、３，６・
・・・・・水管、４．７・・・・・・屈曲部、５，８・
・・・・・間隙、１０・・・・・・火室、１１．１２・
・・・・・筒状間隙、Ａ、Ｂ・・・・・・水管壁。FIG. 1 is a longitudinal sectional front view of the boiler of this invention, and FIG. 2 is a lateral plan view of the same. 1... Outer wall, 2... Exhaust port, 3, 6...
...Water pipe, 4.7...Bend part, 5,8.
...Gap, 10...Firebox, 11.12.
... Cylindrical gap, A, B ... Water tube wall.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 水管を螺旋状に密着させて巻き、縦向き筒状とした内外
２重の水管壁の内側を下部を閉鎖した火室としてその上
部にバーナを設けたボイラにおいて、同径の水管かもな
る内外の水管壁間の筒°扶壁間の上下端を閉鎖し、内側
の水管壁を構成する水管の一部の上下方向に隣接する部
分を一つおきに内方に屈曲して屈曲部を一つおきに形成
し、この屈曲部の上下の水管の間に内外を連通ずる間隙
を形成し、この間隙に相対する側の外側の水管壁を構成
する水管の一部の上下方向に隣接する部分を一つおきに
内方に屈曲して屈曲部を一つおきに形成し、この屈曲部
の上下の水管の間に内外を連通ずる間隙を形成し、外側
の水管壁の外側には上下端を閉鎖した筒状間隙を存して
外壁を形成し、前記内側の水管壁を構成する水管の屈曲
部が位置する側の前記外壁の中程に排気口を設けた強制
循環型ボイラ。In a boiler in which water pipes are tightly wound in a spiral shape, and the inner and outer walls of the vertically cylindrical water pipes are double-layered, the inside of which is a firebox with a closed lower part and a burner is installed on the upper part, the inner and outer water pipes have the same diameter. The upper and lower ends of the tube between the walls of the water pipe are closed, and every other vertically adjacent part of the water pipe constituting the inner water pipe wall is bent inward to form a bent part. A gap is formed between the upper and lower water pipes of this bent part to communicate the inside and outside, and a part of the water pipe forming the outer water pipe wall on the side opposite to this gap is formed in the vertical direction. Every other adjacent part is bent inward to form a bent part, and a gap is formed between the water pipes above and below this bent part to communicate the inside and outside, and the outside of the outer water pipe wall is The forced circulation system has a cylindrical gap with its upper and lower ends closed to form an outer wall, and an exhaust port is provided in the middle of the outer wall on the side where the bent part of the water pipe constituting the inner water pipe wall is located. type boiler.