JP4223046B2 - Structure for preventing scattering of heat storage in a heat storage burner. - Google Patents

Structure for preventing scattering of heat storage in a heat storage burner. Download PDF

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JP4223046B2
JP4223046B2 JP2006069161A JP2006069161A JP4223046B2 JP 4223046 B2 JP4223046 B2 JP 4223046B2 JP 2006069161 A JP2006069161 A JP 2006069161A JP 2006069161 A JP2006069161 A JP 2006069161A JP 4223046 B2 JP4223046 B2 JP 4223046B2
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heat storage
burner
storage body
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昌信 井上
弘治 小椋
直樹 橋本
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、高温焼成炉などに用いる蓄熱式バーナにおける蓄熱体の飛散防止構造に関するものである。 The present invention relates to a structure for preventing scattering of a heat storage body in a heat storage burner used in a high temperature firing furnace or the like.

蓄熱式バーナは、例えば特許文献１に開示されているように、蓄熱室の内部に蓄熱体を備えたバーナである。このバーナは複数個を組み合わせて使用され、３０秒程度の比較的短い周期で交互に燃焼と排気を繰り返す交番燃焼を行うことによって、燃焼ガスの保有熱を排気側のバーナの蓄熱体により回収し、燃焼側のバーナでは燃焼用空気を蓄熱体に通して予熱することにより、高い熱効率を達成することができる。 A heat storage type burner is a burner provided with a heat storage body inside a heat storage chamber, as disclosed in Patent Document 1, for example. This burner is used in combination, and by performing alternating combustion that alternately repeats combustion and exhaust in a relatively short period of about 30 seconds, the heat retained in the combustion gas is recovered by the regenerator of the exhaust burner. In the burner on the combustion side, high heat efficiency can be achieved by preheating the combustion air through the heat storage body.

図４に従来の蓄熱式バーナの概略構造を示す。蓄熱室１前面のバーナタイル２の外縁には複数の気体出入孔１２が設けられ、バーナタイル２の中心には燃料供給管３が挿し込まれている。燃料供給管３は、筒先に種火火炎を保持するための保炎部３３を有している。蓄熱室１は横向き円柱状空間であって、その内部にはセラミックス製の蓄熱体１１が充填されているが、蓄熱室１内に蓄熱体１１を完全に充填することははなはだ困難なことであって、蓄熱室１の上部には、蓄熱体非充填空間１３が残存している。 FIG. 4 shows a schematic structure of a conventional heat storage burner. A plurality of gas inlet / outlet holes 12 are provided at the outer edge of the burner tile 2 in front of the heat storage chamber 1, and a fuel supply pipe 3 is inserted into the center of the burner tile 2. The fuel supply pipe 3 has a flame holding portion 33 for holding a seed flame at the tube tip. The heat storage chamber 1 is a horizontal columnar space, and the inside thereof is filled with a ceramic heat storage body 11, but it is very difficult to completely fill the heat storage chamber 1 with the heat storage body 11. In the upper part of the heat storage chamber 1, the heat storage body non-filling space 13 remains.

燃焼側のバーナにおいて、燃料ガスは種火火炎により着火され、高温に予熱された燃焼用空気によって燃焼されて燃焼ガスとなる。この燃焼ガスは、炉内を通過したのち排ガスとなって排気側のバーナの気体出入孔１２から蓄熱室１内に流入するが、蓄熱体非充填空間１３を高速で通過する際に、上部の蓄熱体１１を吹き飛ばしてしまう。また、バーナが燃焼側となったときにも蓄熱体１１を通過して高温となった燃焼用空気が、気体出入孔１２に向けて蓄熱体非充填空間１３を高速で通過するので、気体出入孔１２近傍の蓄熱体１１を吹き飛ばしてしまう。 In the burner on the combustion side, the fuel gas is ignited by the seed flame and is burned by the combustion air preheated to a high temperature to become a combustion gas. This combustion gas becomes exhaust gas after passing through the furnace and flows into the heat storage chamber 1 from the gas inlet / outlet hole 12 of the exhaust-side burner, but when passing through the heat storage body non-filling space 13 at high speed, The heat storage body 11 is blown away. Further, when the burner is on the combustion side, the combustion air that has passed through the heat storage body 11 and has reached a high temperature passes through the heat storage body non-filling space 13 toward the gas inlet / outlet port 12 at a high speed. The heat storage body 11 in the vicinity of the hole 12 is blown away.

蓄熱体１１は吹き飛ばされることによって、他の蓄熱体１１や蓄熱室側壁と衝突するので、蓄熱体１１はひび割れや破壊などの損傷を受ける。交番燃焼の結果、熱サイクル、熱応力も相まって損傷が進行して多数の破片１４が発生し、この破片１４はバーナが燃焼側となったときに燃焼用空気とともに炉内に噴出される。その結果、電子部品などの精密製品に付着したばあいには製品不良が発生するという問題がある。即ち、従来は一サイクル（一窯の処理）当たりの破片の放出量は１ｋｇに達することもあって、このために蓄熱式バーナの繰り返し使用回数は３０〜５０サイクル程度と短く、耐久性に劣るものであった。
特開２００３−４２４４０号公報 (図１) Since the heat storage body 11 is blown away, it collides with another heat storage body 11 or the side wall of the heat storage chamber, so that the heat storage body 11 is damaged such as cracking or destruction. As a result of the alternating combustion, damage progresses in combination with the thermal cycle and the thermal stress, and a large number of pieces 14 are generated. These pieces 14 are ejected into the furnace together with the combustion air when the burner is on the combustion side. As a result, there is a problem that a product defect occurs when it adheres to a precision product such as an electronic component. That is, conventionally, the amount of debris released per cycle (one kiln treatment) may reach 1 kg. For this reason, the number of repeated use of the regenerative burner is as short as about 30 to 50 cycles, which is inferior in durability. It was a thing.
Japanese Patent Laying-Open No. 2003-42440 (FIG. 1)

本発明は、上記した従来の問題点に鑑み、蓄熱体が、排ガスや燃焼用空気などの高温気体によって吹き飛ばされるのを防止して、耐久性を向上させることができる蓄熱式バーナにおける蓄熱体の飛散防止構造を提供することを課題とする。 In view of the above-described conventional problems, the present invention prevents the heat storage body from being blown away by a high-temperature gas such as exhaust gas or combustion air, and improves the durability of the heat storage body in the heat storage burner. It is an object to provide a scattering prevention structure.

上記の課題を解決するためになされた蓄熱式バーナにおける蓄熱体の飛散防止構造は、蓄熱室の上部に残存する蓄熱体非充填空間に、この空間を高速で通過する高温気体によって蓄熱体が吹き飛ばされて破損するのを防止するために、蓄熱体押え用の重し体を配置した蓄熱式バーナにおける蓄熱体の飛散防止構造であって、
前記重し体は、上面を蓄熱室１の天井壁に沿って湾曲させた蒲鉾状の耐火煉瓦であって、重し体のバーナタイル側端部には、バーナタイルの背面に当接される突出端部が形成されており、この突出端部の両側には、バーナタイルの気体出入孔と連通するスリットが設けられていることを特徴とするものである。 The structure for preventing scattering of the heat storage body in the heat storage burner made to solve the above problem is that the heat storage body blows away into the heat storage body non-filling space remaining in the upper part of the heat storage chamber by the high-temperature gas passing through this space at high speed. In order to prevent damage to the heat storage body, a heat storage body scattering prevention structure in a heat storage burner in which a weight body for holding the heat storage body is disposed ,
The weight body is a bowl-shaped refractory brick whose upper surface is curved along the ceiling wall of the heat storage chamber 1, and the burner tile side end of the weight body is in contact with the back surface of the burner tile. Protruding end portions are formed, and on both sides of the protruding end portions, slits communicating with the gas inlet / outlet holes of the burner tile are provided .

請求項１に係る発明は、蓄熱体の上部に重量な重し体を配置したので、この重し体により蓄熱体が排ガスなどの高温気体によって吹き飛ばされることがない。よって、蓄熱体の飛散による破壊を防止して、蓄熱式バーナの耐久性を向上させることができる。また、スリットから排ガスなどの高温気体が蓄熱室の内外に楽に入出することができる。 In the invention according to claim 1, since the heavy weight body is arranged on the upper part of the heat storage body, the heat storage body is not blown off by the high temperature gas such as exhaust gas. Therefore, destruction due to scattering of the heat storage body can be prevented, and the durability of the heat storage burner can be improved. Further, high-temperature gas such as exhaust gas can easily enter and exit from the heat storage chamber through the slit.

本発明の実施形態を図面に基づき説明する。
図１、２は、本発明に係る蓄熱体の飛散防止構造を備えた蓄熱式バーナを示す図であって、図１はその側面断面図、図２は図１のＡ−Ａ線断面図である。当該蓄熱式バーナも既記したものと同様な構造を有する。即ち、蓄熱室１の内部にはアルミナボールからなる蓄熱体１１が装填されている。バーナタイル２の外縁には複数の気体出入孔１２が設けられている。 Embodiments of the present invention will be described with reference to the drawings.
1 and 2 are views showing a heat storage burner provided with a structure for preventing scattering of a heat storage body according to the present invention, FIG. 1 is a side sectional view thereof, and FIG. 2 is a sectional view taken along line AA in FIG. is there. The heat storage burner also has the same structure as described above. That is, a heat storage body 11 made of alumina balls is loaded inside the heat storage chamber 1. A plurality of gas inlet / outlet holes 12 are provided on the outer edge of the burner tile 2.

蓄熱体１１の上部には蓄熱体非充填空間１３が残存し、この空間１３には重量な重し体５が配置されている。重し体５の詳細を図３に示すが、この重し体５は上面を蓄熱室１の天井壁に沿って湾曲させた蒲鉾状の耐火煉瓦である。そして、重し体５のバーナタイル側端部は、バーナタイル２の背面に当接される突出端部５２が形成されており、この突出端部５２の両側には、バーナタイル２の気体出入孔１２と連通するスリット５３が設けられている。さらに、このスリット５３の横側には、突出端部５２より後ろに退却されている後退端部５４が形成されている。 A heat storage body non-filling space 13 remains above the heat storage body 11, and a heavy weight body 5 is disposed in the space 13. Details of the weight body 5 are shown in FIG. 3, and this weight body 5 is a bowl-shaped refractory brick whose upper surface is curved along the ceiling wall of the heat storage chamber 1. The burner tile side end portion of the weight 5 is formed with a protruding end portion 52 that comes into contact with the back surface of the burner tile 2. A slit 53 communicating with the hole 12 is provided. Further, a receding end portion 54 that is retracted behind the protruding end portion 52 is formed on the side of the slit 53.

重し体５が蓄熱室１の上部に配置された図１の状態においては、重し体５の突出端部５２はバーナタイル２の背面に当接され、且つ、スリット５３が気体出入孔１２と連通している。また、バーナタイル２の背面と後退端部５４との間には、隙間５５が形成されている。したがって、高温気体はスリット５３と隙間５５を通って蓄熱室１の内外に入出することができるので、重し体５が高温気体の通過の妨げとなることはない。 In the state of FIG. 1 in which the weight body 5 is arranged at the upper part of the heat storage chamber 1, the protruding end portion 52 of the weight body 5 is brought into contact with the back surface of the burner tile 2, and the slit 53 is formed in the gas inlet / outlet hole 12. Communicated with. In addition, a gap 55 is formed between the back surface of the burner tile 2 and the retracted end portion 54. Therefore, since the high temperature gas can enter and exit the heat storage chamber 1 through the slit 53 and the gap 55, the weight body 5 does not hinder the passage of the high temperature gas.

以上のように構成された蓄熱式バーナにおいては、燃焼側のバーナにおいて保存されていた種火火炎により燃料ガスが着火され、蓄熱室１で予熱された高温の燃焼用空気によって完全燃焼されて燃焼ガスとなる。排気側のバーナにおいては、炉内を通過した燃焼ガスが排ガスとなって気体出入孔１２からスリット５３、隙間５５を通って蓄熱室１内に流入する。この際、蓄熱体１１は重し体５によって押え付けられているので、排ガスの高速流入によって飛散されることはない。 In the regenerative burner configured as described above, the fuel gas is ignited by the seed flame stored in the burner on the combustion side, and is burned completely by the high-temperature combustion air preheated in the heat storage chamber 1. It becomes gas. In the burner on the exhaust side, the combustion gas that has passed through the furnace becomes exhaust gas and flows into the heat storage chamber 1 from the gas inlet / outlet hole 12 through the slit 53 and the gap 55. At this time, since the heat storage body 11 is pressed by the weight body 5, it is not scattered by the high-speed inflow of exhaust gas.

また、バーナが燃焼側となった場合には、吸排気口から取り込まれた低温の空気は蓄熱体１１を通過して予熱され、スリット５３および隙間５５から気体出入孔１２を通って炉内に噴出されるが、この場合にも、蓄熱体１１は重し体５によって押え付けられているので、空気の高速通過によって飛散されることはない。 When the burner is on the combustion side, the low-temperature air taken in from the intake / exhaust port is preheated through the heat accumulator 11 and enters the furnace through the gas inlet / outlet 12 from the slit 53 and the gap 55. In this case as well, the heat storage body 11 is pressed by the weight body 5 and is not scattered by the high-speed passage of air.

以上のような飛散防止対策を施したことによって、従来１サイクル当たり１ｋｇにも達していた破片の炉内への放出量を平均で１サイクル当たり０．０１ｋｇと大幅に低減することができた。その結果、従来は繰り返し使用回数が３０〜５０サイクル程度と短かかった蓄熱式バーナの耐久性を、３００サイクル以上と大幅に向上させることができた。
したがって、本発明に係る蓄熱体の飛散防止構造は、蓄熱式バーナの耐久性を大幅に向上させることができるものとして、工業的価値が大きいものである。 By taking the above-described anti-scattering measures, the amount of fragments released into the furnace, which had reached 1 kg per cycle in the past, could be significantly reduced to an average of 0.01 kg per cycle. As a result, it has been possible to significantly improve the durability of the heat storage burner, which has conventionally been as short as 30 to 50 cycles, and can be greatly improved to 300 cycles or more.
Therefore, the scattering prevention structure for a heat storage body according to the present invention has a great industrial value as it can greatly improve the durability of the heat storage burner.

本発明に係る蓄熱体の飛散防止構造を備えた蓄熱式バーナの側面断面図である。It is side surface sectional drawing of the thermal storage type burner provided with the scattering prevention structure of the thermal storage body which concerns on this invention. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 重し体の（ａ）正面図、（ｂ）平面図、（ｃ）側面図である。It is (a) front view, (b) top view, (c) side view of a weight body. 従来の蓄熱式バーナの側面断面図である。It is side surface sectional drawing of the conventional heat storage type burner.

符号の説明Explanation of symbols

１ 蓄熱室、２ バーナタイル、３ 燃料供給管、５ 重し体、１１ 蓄熱体、１２ 気体出入孔、１３ 蓄熱体非充填空間、５３ スリット 1 heat storage chamber, 2 burner tiles, 3 fuel supply pipes, 5 overlapping bodies, 11 heat storage bodies, 12 gas inlet / outlet holes, 13 heat storage body non-filling space, 53 slits

Claims (1)

蓄熱室の上部に残存する蓄熱体非充填空間に、この空間を高速で通過する高温気体によって蓄熱体が吹き飛ばされて破損するのを防止するために、蓄熱体押え用の重し体を配置した蓄熱式バーナにおける蓄熱体の飛散防止構造であって、
前記重し体は、上面を蓄熱室１の天井壁に沿って湾曲させた蒲鉾状の耐火煉瓦であって、重し体のバーナタイル側端部には、バーナタイルの背面に当接される突出端部が形成されており、この突出端部の両側には、バーナタイルの気体出入孔と連通するスリットが設けられていることを特徴とする蓄熱式バーナにおける蓄熱体の飛散防止構造。 In the heat storage body non-filling space remaining in the upper part of the heat storage chamber, in order to prevent the heat storage body from being blown away and damaged by the high-temperature gas passing through this space at high speed, a weight for holding the heat storage body was disposed. A structure for preventing scattering of a heat storage body in a heat storage burner,
The weight body is a bowl-shaped refractory brick whose upper surface is curved along the ceiling wall of the heat storage chamber 1, and the burner tile side end of the weight body is in contact with the back surface of the burner tile. A projecting end portion is formed, and on both sides of the projecting end portion, a slit communicating with a gas inlet / outlet hole of the burner tile is provided .
JP2006069161A 2006-03-14 2006-03-14 Structure for preventing scattering of heat storage in a heat storage burner. Active JP4223046B2 (en)

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