JPH0227589B2 - - Google Patents
Info
- Publication number
- JPH0227589B2 JPH0227589B2 JP60166373A JP16637385A JPH0227589B2 JP H0227589 B2 JPH0227589 B2 JP H0227589B2 JP 60166373 A JP60166373 A JP 60166373A JP 16637385 A JP16637385 A JP 16637385A JP H0227589 B2 JPH0227589 B2 JP H0227589B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- atmosphere
- circulation
- partition plate
- perforated
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
- Tunnel Furnaces (AREA)
- Furnace Details (AREA)
- Cookers (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、雰囲気循環式炉、特に、ガラス製品
の熱処理炉に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a circulating atmosphere furnace, and in particular to a heat treatment furnace for glass products.
（従来の技術とその問題点）
従来、一般に、雰囲気循環式炉としては、たと
えば、特公昭58−34416号公報に開示された形式
のものが広く採用されている。(Prior Art and its Problems) Conventionally, as an atmosphere circulation furnace, for example, the type disclosed in Japanese Patent Publication No. 58-34416 has been widely adopted.
すなわち、第６図に示すように、炉１内に隔板
（バツフル）２を設けて、炉壁との間に雰囲気循
環路３を形成し、炉天井に設けた循環フアン４に
より炉内雰囲気を循環するとともに、バーナ等の
加熱手段５で昇温したのち、炉内低部から上方に
向かつて吹き出し、メツシユベルトからなるコン
ベアベルト６上に載置された処理材（図示せず）
を熱処理するようになついる。なお、７は多孔板
からなる支持板である。 That is, as shown in FIG. 6, a bulkhead 2 is provided inside the furnace 1 to form an atmosphere circulation path 3 between it and the furnace wall, and a circulation fan 4 installed on the furnace ceiling circulates the atmosphere inside the furnace. The treated material is circulated and heated by a heating means 5 such as a burner, then blown upward from the lower part of the furnace and placed on a conveyor belt 6 consisting of a mesh belt (not shown).
The process of heat treatment is becoming more common. Note that 7 is a support plate made of a perforated plate.
ところで、コンベアベルト上の処理材を均一に
熱処理するためには、循環雰囲気が十分に混合さ
れて均一温度となつていることと、循環雰囲気が
均一に処理材に接すること、および、隔板２にて
偏流を生じないことが必要である。 By the way, in order to heat-treat the processing material on the conveyor belt uniformly, it is necessary that the circulating atmosphere is sufficiently mixed to have a uniform temperature, that the circulating atmosphere uniformly contacts the processing material, and that the partition plate 2 It is necessary that no drift occurs in the flow.
しかしながら、前記従来のものでは、炉内循環
雰囲気が両側に位置する雰囲気循環路３の下部か
らコンベアベルト６の下部に供給されて、コンベ
アベルト６から隔板２内に吹き出すため、処理材
の部位間において、雰囲気に接する部位と接しな
い部位とが生じ、しかも炉幅方向および炉長方向
に均一に吹き出さない。また、雰囲気循環路３内
には何の混合手段もないため、バーナ等の加熱手
段５によつて加熱された雰囲気は他の雰囲気と十
分混合しないため、前記吹き出し量の不均一性と
相まつて、炉幅方向および炉長方向における炉内
雰囲気に±15℃もの温度差が生じ、処理材を均一
に熱処理することは非常に困難であるという問題
を有していた。このことは、徐冷帯および冷却帯
でも同様である。 However, in the conventional method, the circulating atmosphere in the furnace is supplied from the lower part of the atmosphere circulation path 3 located on both sides to the lower part of the conveyor belt 6, and is blown out from the conveyor belt 6 into the partition plate 2. In between, some parts are in contact with the atmosphere and others are not in contact with the atmosphere, and the air is not blown out uniformly in the furnace width direction and the furnace length direction. In addition, since there is no mixing means in the atmosphere circulation path 3, the atmosphere heated by the heating means 5 such as a burner does not mix sufficiently with other atmospheres, which is combined with the non-uniformity of the blowout amount. However, there was a problem in that a temperature difference of as much as ±15°C occurred in the furnace atmosphere in the furnace width direction and the furnace length direction, making it extremely difficult to uniformly heat treat the treated material. This also applies to the slow cooling zone and the cooling zone.
本発明では、簡単な構成で、均一温度の循環雰
囲気を形成するとともに、隔板内の循環雰囲気を
処理材に均一に接するようにし、さらに、炉幅方
向および炉長方向において循環雰囲気を均一に吹
き出して、処理材を均一に熱処理することのでき
る雰囲気循環式炉を提供することを目的とする。 In the present invention, with a simple configuration, a circulating atmosphere with a uniform temperature is formed, the circulating atmosphere inside the partition plate is brought into uniform contact with the processing material, and the circulating atmosphere is made uniform in the furnace width direction and the furnace length direction. An object of the present invention is to provide an atmosphere circulation furnace capable of uniformly heat-treating materials by blowing air.
（問題点を解決すべき手段）
本発明は、前記目的を達成するために炉天井部
に循環フアンを有するとともに、炉内に設けた隔
板により形成した雰囲気循環路を備えた雰囲気循
環式炉において、前記隔板内の上部に、上下２段
の多孔板を配設し、この多孔板間で形成される空
間に、炉長方向に延在する仕切板を設けて、前記
空間を炉幅方向で中央部および両側部の少なくと
も３室に区画し、かつ、前記循環フアンにより雰
囲気循環路からの炉内雰囲気多孔板を介して下方
に吹き出すようにしたものである。(Means to Solve the Problems) In order to achieve the above object, the present invention provides an atmosphere circulation furnace having a circulation fan on the furnace ceiling and an atmosphere circulation path formed by a partition plate provided in the furnace. In this method, upper and lower perforated plates are arranged in the upper part of the partition plate, and a partition plate extending in the furnace length direction is provided in the space formed between the perforated plates, so that the space is divided into the furnace width. The furnace is divided into at least three chambers, one in the center and one on both sides, and the circulation fan blows out the atmosphere from the atmosphere circulation path downward through the perforated plate.
（実施例）
つぎに、本発明を一実施例である図面にしたが
つて説明する。(Example) Next, the present invention will be explained with reference to the drawings which are one example.
本発明が適用される雰囲気循環式炉Ｔは、第４
図に示すように、加熱・均熱帯１０、徐冷帯２６
および冷却帯２９とからなり、処理材はコンベア
ベルト６によつて前記各帯域を搬送され、その間
に熱処理されるものである。なお、前記各帯域
は、複数の単位帯域１０Ａ，２６Ａ，２９Ａから
なつている。 The atmosphere circulation type furnace T to which the present invention is applied has a fourth
As shown in the figure, heating/soaking zone 10, slow cooling zone 26
and a cooling zone 29, and the material to be treated is conveyed through each zone by the conveyor belt 6, during which time it is heat treated. Note that each of the bands is made up of a plurality of unit bands 10A, 26A, and 29A.
前記加熱・均熱帯１０の単位帯域１０Ａは、大
略、第１図に示すように、耐火断熱材からなる炉
本体１１の炉内に設けた隔板（バツフル）１３と
循環フアン１７と加熱手段であるバーナ１９とか
らなる。このバーナ１９はラジアントチユーブ、
あるいは電熱ヒータであつてもよい。 As shown in FIG. 1, the unit zone 10A of the heating/soaking zone 10 is roughly composed of a partition plate 13 provided in the furnace of the furnace body 11 made of a fireproof heat insulating material, a circulation fan 17, and a heating means. It consists of a certain burner 19. This burner 19 is a radiant tube,
Alternatively, it may be an electric heater.
そして、前記隔板１３は、両側に側板１４を有
するとともに、上面は舟底天井１５を有し、この
隔板１３は、炉天井から吊持固定されている。ま
た、側板１４と炉底部との間および炉側壁との間
には、それぞれ空間が設けられる一方、炉天井に
取り付けられた循環フアン１７の羽根部１８が、
前記天井１５部に位置して、前記空間とで炉内雰
囲気循路（以下循環路という）１６を形成する。 The partition plate 13 has side plates 14 on both sides, and has a bottom ceiling 15 on its upper surface, and the partition plate 13 is suspended and fixed from the furnace ceiling. In addition, spaces are provided between the side plate 14 and the furnace bottom and between the furnace side wall, while the blades 18 of the circulation fan 17 attached to the furnace ceiling
It is located in the ceiling 15 and forms an in-furnace atmosphere circulation path (hereinafter referred to as circulation path) 16 with the space.
さらに、この循環路１６には、バーナ１９が位
置している。 Furthermore, a burner 19 is located in this circulation path 16.
本発明においては、前記隔板１３の上部に２枚
の多孔板２０ａ，２０ｂを所定間隔をもつて上下
２段に配設し、これら多孔板２０ａ，２０ｂ間で
空間２３を形成するとともに、この空間２３を炉
長方向に延在した３枚の仕切板２４ａ，２４ｂ，
２４ｃにより、空間２３を炉幅方向に４区画２５
ａ〜２５ｄに区画している。 In the present invention, two perforated plates 20a and 20b are arranged in upper and lower stages at a predetermined interval above the partition plate 13, and a space 23 is formed between these perforated plates 20a and 20b. Three partition plates 24a, 24b extend the space 23 in the furnace length direction,
24c divides the space 23 into four sections 25 in the furnace width direction.
It is divided into sections a to 25d.
そして、前記上段の多孔板２０ａに設ける孔２
１の径は、中央部、実施例では、中央の２区画２
５ｂ，２５ｃが、両側の孔２１の径より大きくな
つており、一方、下段の多孔板２０ｂの孔２２の
径はすべて均一で、かつ、多孔板２０ａの孔２１
の径より小さくなつている。また、循環フアン１
７は、下方に炉内雰囲気を吹き出すようになつて
いる。 Holes 2 provided in the upper perforated plate 20a
The diameter of 1 is the central part, and in the example, the diameter of the central 2 sections 2
5b and 25c are larger than the diameters of the holes 21 on both sides, while the diameters of the holes 22 in the lower perforated plate 20b are all uniform, and the diameters of the holes 21 in the perforated plate 20a are larger.
It is smaller than the diameter of Also, circulation fan 1
7 is designed to blow out the atmosphere inside the furnace downward.
つぎに、徐冷帯２６の単位帯域２６Ａは、第２
図に示すように、前記加熱・均熱帯１０の単位帯
域１０Ａの構成の他に、隔板１３の上方に大気を
導入する冷却ダクト２７と、炉内雰囲気を排出す
る排気ダクト２８とを設けたもので、炉内循環雰
囲気温度を、バーナ１９の燃焼量、冷却ダクト２
７からの大気導入量および排気ダクト２８からの
炉内雰囲気の排気量を調節して所定温度にするよ
うになつている。 Next, the unit zone 26A of the slow cooling zone 26 is the second
As shown in the figure, in addition to the configuration of the unit zone 10A of the heating/soaking zone 10, a cooling duct 27 for introducing the atmosphere above the partition plate 13 and an exhaust duct 28 for discharging the atmosphere inside the furnace are provided. The temperature of the circulating atmosphere in the furnace, the combustion amount of the burner 19, the cooling duct 2
A predetermined temperature is achieved by adjusting the amount of air introduced from the furnace 7 and the amount of exhaust of the atmosphere inside the furnace from the exhaust duct 28.
また、冷却帯２９の単位帯域２９Ａは、第３図
に示す構成からなり、徐冷帯２６の単位帯域２６
Ａと比較すれば明らかなように、バーナ１９がな
く、かつ、炉本体１１が断熱構造となつていない
点のみが異なる。 Further, the unit zone 29A of the cooling zone 29 has the configuration shown in FIG.
As is clear from comparison with A, the only difference is that there is no burner 19 and the furnace body 11 does not have a heat insulating structure.
つぎに、前記構成からなる雰囲気循環炉の操業
について述べる。 Next, the operation of the atmosphere circulation furnace constructed as described above will be described.
まず、加熱・均熱帯１０においては、バーナ１
９を燃焼させて循環フアン１７を回転すると、炉
内雰囲気は循環路１６を矢印で示すように循環し
て、バーナ１９により加熱され、所定温度に加熱
された炉内雰囲気は、循環フアン１７により吸引
撹拌されて、隔板１３内に吹き出す。 First, in the heating/soaking zone 10, burner 1
9 is burned and the circulation fan 17 is rotated, the atmosphere in the furnace circulates through the circulation path 16 as shown by the arrow, and is heated by the burner 19. The atmosphere in the furnace heated to a predetermined temperature is It is sucked and stirred and blown out into the partition plate 13.
ところで、循環フアン１７から吹き出された炉
内雰囲気は、循環フアン１７の特性により第５図
に示すように、遠心力により斜め下方に大量に吹
き出すことになる。 By the way, due to the characteristics of the circulation fan 17, the atmosphere inside the furnace blown out from the circulation fan 17 is blown diagonally downward in large quantities due to centrifugal force, as shown in FIG.
しかしながら、本発明においては、上下２段に
多孔板２０ａ，２０ｂを配設してあり、かつ、上
段の多孔板２０ａに設けた孔２１の径は、中央部
において大径となつているため、各区画空間２５
ａ〜２５ｄは、ほぼ均一の風量が入ることになる
ばかりか、たとえ、各区画空間２５ａ〜２５ｄに
斜め下方への方向性をもつて炉内雰囲気が入つて
も、他の区画空間へ移動せず、下段の小径孔か
ら、下方へ真つ直ぐに均一に吹き出すことにな
る。 However, in the present invention, the perforated plates 20a and 20b are arranged in two upper and lower stages, and the diameter of the hole 21 provided in the upper perforated plate 20a is larger in the central part. Each compartment space 25
A to 25d not only allow a substantially uniform air volume to enter, but even if the furnace atmosphere enters each compartment space 25a to 25d with a diagonal downward direction, it cannot be moved to another compartment space. First, it will blow out straight and evenly downward from the small diameter hole in the lower stage.
このことは、徐冷帯２６、冷却帯２９において
も全く同様であり、かつ、熱処理の方法は従来の
ものと同様ななので詳細な説明は省略する。 This is exactly the same in the slow cooling zone 26 and the cooling zone 29, and the heat treatment method is the same as the conventional method, so a detailed explanation will be omitted.
前記説明では、上段の多孔板２０ａの孔径中央
部と両側部とで異ならしめたが、すべて同一孔径
とし、その孔数を中央部において多くしてもよ
い。 In the above description, the pore diameters of the upper perforated plate 20a are different between the central part and both sides, but the pores may all have the same diameter and the number of holes may be increased in the central part.
（発明の効果）
以上の説明で明らかなように、本発明によれ
ば、加熱手段によつて昇温された炉内循環雰囲気
は、直接コンベアベルト部から隔板内に供給され
るのではなく、炉天井に設けた循環フアンによつ
て十分に撹拌混合させてから、上下２段に設けた
多孔板で形成され、かつ、炉幅方向に区画された
区画空間に入り、ここから下方に吹き出すため、
均一な温度分布を有する循環雰囲気で処理材に均
一な雰囲気量を与えることができ、さらに、多孔
板からの吹き出し量は、炉幅方向および炉長方向
で均一とすることができ、処理材はほぼ均一に熱
処理される。(Effects of the Invention) As is clear from the above description, according to the present invention, the circulating atmosphere in the furnace heated by the heating means is not directly supplied into the partition plate from the conveyor belt section. After the mixture is thoroughly stirred and mixed by a circulation fan installed on the furnace ceiling, it enters a compartment space formed by perforated plates installed in two stages, upper and lower, and partitioned in the width direction of the furnace, from which it is blown downward. For,
The circulating atmosphere with uniform temperature distribution can provide a uniform amount of atmosphere to the treated material, and furthermore, the amount of air blown from the perforated plate can be made uniform in the furnace width direction and the furnace length direction, so that the treated material can be Heat treated almost uniformly.
したがつて、処理材がガラス製品などの熱伝導
率が悪いものであつても、熱歪みにより破損する
ことはない等の効果を奏する。 Therefore, even if the treated material has poor thermal conductivity, such as a glass product, it will not be damaged due to thermal distortion.
第１図は加熱・均熱帯の断面図、第２図は徐冷
帯の断面図、第３図は冷却帯の第３図、第４図は
本発明の雰囲気循環式炉の概略平面図、第５図は
循環フアンの風量の状態を示す説明図で、第６図
は従来の雰囲気循環式炉の断面図である。
１０〜加熱・均熱帯、１１〜炉本体、１２〜耐
火断熱材、１３〜隔板、１６〜循環路、１７〜循
環フアン、２０ａ，２０ｂ〜多孔板、２１，２２
〜孔、２３〜空間、２４〜仕切板、２６〜徐冷
帯、２７〜冷却ダクト、２８〜排気ダクト、２９
〜冷却帯。
FIG. 1 is a sectional view of the heating/soaking zone, FIG. 2 is a sectional view of the slow cooling zone, FIG. 3 is a sectional view of the cooling zone, and FIG. 4 is a schematic plan view of the atmosphere circulation furnace of the present invention. FIG. 5 is an explanatory diagram showing the state of the air volume of the circulation fan, and FIG. 6 is a sectional view of a conventional atmosphere circulation type furnace. 10-heating/soaking area, 11-furnace body, 12-refractory insulation material, 13-diaphragm, 16-circulation path, 17-circulation fan, 20a, 20b-perforated plate, 21, 22
~ hole, 23 ~ space, 24 ~ partition plate, 26 ~ slow cooling zone, 27 ~ cooling duct, 28 ~ exhaust duct, 29
~Cooling zone.
Claims (1)
内に設けた隔板により形成した雰囲気循環路を備
えた雰囲気循環式炉において、前記隔板内の上部
に、上下２段の多孔板を配設し、この多孔板間で
形成される空間に、炉長方向に延在する仕切板を
設けて、前記空間を炉幅方向で中央部および両側
部の少なくとも３室に区画し、かつ、前記循環フ
アンにより雰囲気循環路からの炉内雰囲気を多孔
板を介して下方に噴出するようにしたことを特徴
とする雰囲気循環式炉。 ２ 前記上段の多孔板における中央部の孔径が、
両側部の孔径より大であることを特徴とする前記
特許請求の範囲第１項に記載の雰囲気循環式炉。[Scope of Claims] 1. In an atmosphere circulation furnace having a circulation fan on the furnace ceiling and an atmosphere circulation path formed by a partition plate provided in the furnace, there are two stages, upper and lower, in the upper part of the partition plate. perforated plates are arranged, and a partition plate extending in the furnace length direction is provided in the space formed between the perforated plates, and the space is divided in the furnace width direction into at least three chambers, a central part and both side parts. An atmosphere circulation furnace characterized in that the circulation fan blows out the furnace atmosphere from the atmosphere circulation path downward through the perforated plate. 2 The hole diameter at the center of the upper perforated plate is
The atmosphere circulation furnace according to claim 1, wherein the diameter of the holes is larger than that of the holes on both sides.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60166373A JPS6226483A (en) | 1985-07-26 | 1985-07-26 | Atmosphere circulation type furnace |
| KR8605951A KR910009587B1 (en) | 1985-07-26 | 1986-07-22 | Forced circulation furnace |
| CN86105665A CN1007177B (en) | 1985-07-26 | 1986-07-23 | Forced circulation furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60166373A JPS6226483A (en) | 1985-07-26 | 1985-07-26 | Atmosphere circulation type furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6226483A JPS6226483A (en) | 1987-02-04 |
| JPH0227589B2 true JPH0227589B2 (en) | 1990-06-18 |
Family
ID=15830205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60166373A Granted JPS6226483A (en) | 1985-07-26 | 1985-07-26 | Atmosphere circulation type furnace |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS6226483A (en) |
| KR (1) | KR910009587B1 (en) |
| CN (1) | CN1007177B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006193863A (en) * | 2005-01-14 | 2006-07-27 | Toho Tenax Co Ltd | Flame resisting treatment furnace |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5143507B2 (en) * | 2007-09-03 | 2013-02-13 | Ｊｆｅスチール株式会社 | Continuous heating furnace |
| GB2478782A (en) * | 2010-03-19 | 2011-09-21 | Simon S Mcnally | Non return valve for drainpipes used to protect properties in the event of flooding |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5865409U (en) * | 1981-10-27 | 1983-05-04 | タイホ−工業株式会社 | rectifier |
| JPS6244986Y2 (en) * | 1985-01-24 | 1987-11-30 |
-
1985
- 1985-07-26 JP JP60166373A patent/JPS6226483A/en active Granted
-
1986
- 1986-07-22 KR KR8605951A patent/KR910009587B1/en not_active Expired
- 1986-07-23 CN CN86105665A patent/CN1007177B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006193863A (en) * | 2005-01-14 | 2006-07-27 | Toho Tenax Co Ltd | Flame resisting treatment furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6226483A (en) | 1987-02-04 |
| KR870001120A (en) | 1987-03-11 |
| CN1007177B (en) | 1990-03-14 |
| KR910009587B1 (en) | 1991-11-21 |
| CN86105665A (en) | 1987-01-21 |
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