JPS5812513B2 - heating furnace - Google Patents
heating furnaceInfo
- Publication number
- JPS5812513B2 JPS5812513B2 JP54162100A JP16210079A JPS5812513B2 JP S5812513 B2 JPS5812513 B2 JP S5812513B2 JP 54162100 A JP54162100 A JP 54162100A JP 16210079 A JP16210079 A JP 16210079A JP S5812513 B2 JPS5812513 B2 JP S5812513B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- article
- furnace body
- conveyor line
- burner
- 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
Links
Landscapes
- Drying Of Solid Materials (AREA)
- Tunnel Furnaces (AREA)
Description
【発明の詳細な説明】
本発明は、コンベアラインの一部に組込まれ、搬送され
る物品の乾燥、焼付塗装などを行うようにした自然対流
方式の加熱炉に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a natural convection type heating furnace which is incorporated into a part of a conveyor line and is used to dry, bake coat, etc. the articles being conveyed.
この種の加熱炉では、熱効率、安定性、均一性、安全性
などを考慮して適切な熱源が選定される。In this type of heating furnace, an appropriate heat source is selected in consideration of thermal efficiency, stability, uniformity, safety, etc.
バーナ装置によって液体、気体燃料を燃焼し、燃焼ガス
による熱気を直接炉内に導入して加熱するものは、熱カ
ロリーが高く、設備が簡単で、使い易いなどの経済的利
点がある。A burner device that burns liquid or gaseous fuel and heats the furnace by directly introducing hot air from the combustion gas into the furnace has economic advantages such as high thermal calorie, simple equipment, and ease of use.
しかし反面、燃焼ガスによって熱が炉内に運び込まれて
物品を加熱するのであるから、大量の燃焼ガスを炉内に
導入する必要がある。However, on the other hand, since heat is carried into the furnace by the combustion gas to heat the article, it is necessary to introduce a large amount of combustion gas into the furnace.
このことは同量のガスが炉から排出される結果となって
、その新陳代謝を効率よく行わないと燃料の浪費となる
。This results in the same amount of gas being exhausted from the furnace, which results in wasted fuel if it is not metabolized efficiently.
特にコンベアラインによる品物の出入口の処理が問題と
なる。Particularly problematic is the handling of the entrances and exits for goods on the conveyor line.
このことから、排出される熱ガスを回収して再び炉内に
強制的に導入する再循環方式が考えられている。For this reason, a recirculation method has been considered in which the exhausted hot gas is recovered and forcibly introduced into the furnace again.
しかし、再循環方式は循環用送風機、ダクトあるいは熱
交換器の設置が必要であり、部品点数が増加し、構造も
複雑になる欠点がある。However, the recirculation method requires the installation of a circulation blower, duct, or heat exchanger, which has the disadvantage of increasing the number of parts and complicating the structure.
また、再循環方式の炉を焼付塗装の加熱炉に使用したと
きは、塗料から発生するシンナ分が再循環によって次第
に濃度を増し、塗装面を白濁させる悪影響が表われ、さ
らに濃くなれば、爆発の危険がある。In addition, when a recirculation type furnace is used as a heating furnace for baking paint, the concentration of thinner generated from the paint gradually increases due to recirculation, which has the negative effect of making the painted surface cloudy. There is a risk of
これを防ぐには、濃度を下げるよう空気の補充を必要と
したり、また、再循環ダクトからの熱放散も大きく、結
局は特に熱効率の向上が見られない。To prevent this, air must be replenished to reduce the concentration, and heat dissipation from the recirculation duct is also large, resulting in no particular improvement in thermal efficiency.
ところで、コンベアラインのスピードと加熱所要時間の
関係から炉体を長く設定する必要がある場合がある。By the way, there are cases where it is necessary to set the furnace body to be long due to the relationship between the speed of the conveyor line and the required heating time.
このような炉体では山型炉形式にすることは可能ではあ
るが、排気の流れが速くなり、炉内に乱流を生じて炉内
の温度分布が不均一となり、安定した加熱が不加能にな
る。Although it is possible to use a mountain-shaped furnace for such a furnace, the flow of exhaust gas becomes faster, creating turbulent flow within the furnace and causing uneven temperature distribution within the furnace, making stable heating difficult. become capable.
バーナ装置の配置を工夫すればある程度安定した熱分布
は得られるが、加熱温度(燃料)によっては一様に制御
できない。A somewhat stable heat distribution can be obtained by carefully arranging the burner device, but it cannot be uniformly controlled depending on the heating temperature (fuel).
特に中央部分に渋滞するガスが多く存在し、前記のよう
に焼付塗装用の場合は塗装面への悪影響や爆発の危険が
生ずる。In particular, there is a lot of gas congested in the central part, and as mentioned above, in the case of baking painting, there is a risk of an adverse effect on the painted surface or an explosion.
本発明は上記の不具合に鑑み、安定した均一な熱分布を
得られる長い炉体を持つ自然対流方式の加熱炉を提供す
るものである。In view of the above-mentioned problems, the present invention provides a natural convection type heating furnace having a long furnace body that can obtain stable and uniform heat distribution.
以下、本発明の一実施例について説明する。An embodiment of the present invention will be described below.
第1図は燃料直接燃焼方式の加熱炉の原理を示すもので
ある。FIG. 1 shows the principle of a heating furnace of direct fuel combustion type.
図中、符号aは加熱炉のいわゆる山型形状をなす炉体を
示し、この炉体aは炉下床部bにバーナ装置Cが設置さ
れる。In the figure, reference numeral a indicates a so-called chevron-shaped furnace body of the heating furnace, and a burner device C is installed in the lower floor b of the furnace body a.
炉体aの両端部は外側に向って斜めに下り傾斜するとと
もに、この両端に物品入口fおよび物品出口gが形成さ
れ、炉体aの物品入口fから物品出口gに亘ってコンベ
アラインdが炉頂壁に敷設されており、コンベアライン
dにより物品入口fから炉内に搬入された物品eはコン
ベアラインdに吊設支持されて炉内を通り、物品出口g
に案内され、物品eが炉内を通る間に加熱され、あるい
は焼付塗装される。Both ends of the furnace body a are inclined downwardly toward the outside, and an article inlet f and an article outlet g are formed at both ends, and a conveyor line d extends from the article inlet f to the article outlet g of the furnace body a. Articles e are placed on the top wall of the furnace, and are carried into the furnace from the article entrance f by the conveyor line d.The articles e are suspended and supported by the conveyor line d, pass through the furnace, and reach the article outlet g.
While the article e passes through the furnace, it is heated or baked or painted.
物品出入口f,gの上縁f′ , g′は炉下床部bの
床面とほぼ同じ高さに設定され、炉内には椀をかぶせた
ような形の物品加熱領域が形成される。The upper edges f' and g' of the article entrances and exit ports f and g are set at approximately the same height as the floor surface of the lower furnace floor part b, and a bowl-shaped article heating area is formed in the furnace. .
しかして、バーナ装置cでの燃焼により発生した熱気は
自然対流現象により上昇し、炉頂部に案内される一方、
搬送される物品eと熱交換して温度降下した低温のガス
は下降し、物品入口fおよび出口gの上縁から押し出さ
れる。The hot air generated by combustion in burner device c rises due to natural convection and is guided to the top of the furnace.
The low-temperature gas whose temperature has been lowered by heat exchange with the transported article e descends and is pushed out from the upper edges of the article inlet f and outlet g.
このため、炉内に充満するガスは高温のものであり、低
温のガスから排出されるという機構をとる。Therefore, the gas that fills the furnace is high temperature, and a mechanism is adopted in which the low temperature gas is exhausted first.
次に、本発明の加熱炉の具体的実施例を第2図および第
3図に示す。Next, specific examples of the heating furnace of the present invention are shown in FIGS. 2 and 3.
第2図において、符号1はいわゆる山型炉の炉体で長い
トンネル状になる、その両端部は斜め下方へ傾斜して物
品入口2、物品出口3が開口する。In FIG. 2, reference numeral 1 denotes a furnace body of a so-called mountain-shaped furnace, which is shaped like a long tunnel, and both ends thereof are inclined diagonally downward, and an article inlet 2 and an article outlet 3 are opened.
炉体1内には物品入口2、物品出口3から導入導出され
るコンベアライン4が上壁に沿って敷設され、コンベア
ライン4上の物品5が炉体1内を通過する。Inside the furnace body 1, a conveyor line 4 which is introduced and led out from an article inlet 2 and an article outlet 3 is laid along the upper wall, and articles 5 on the conveyor line 4 pass through the inside of the furnace body 1.
上記物品入口2、物品出口3の上縁は炉内下床6と略同
じ高さに設定する。The upper edges of the article inlet 2 and article outlet 3 are set at approximately the same height as the lower floor 6 in the furnace.
炉下床6には、ピット8が凹設され、このピツト8の内
底に所定の長さのバーナ装置7を設置する。A pit 8 is recessed in the lower floor 6 of the furnace, and a burner device 7 of a predetermined length is installed at the inner bottom of the pit 8.
バーナ装置7は、横置きのノズルバー9,9を一定間隔
で縦方向に多数配置して構成する。The burner device 7 is constructed by arranging a large number of horizontal nozzle bars 9, 9 at regular intervals in the vertical direction.
ノズルバー9,9には多数のノズルを配してあり、バー
ナ装置7は一定巾の所定長さに亘って多数のノズル群が
配置される。A large number of nozzles are arranged on the nozzle bars 9, 9, and a large number of nozzle groups are arranged in the burner device 7 over a predetermined length having a constant width.
このバーナ装置7を1単位として複数のバーナ装置7,
7が適当間隔で炉内長さ方向に配設される。A plurality of burner devices 7, with this burner device 7 as one unit,
7 are arranged at appropriate intervals in the length direction inside the furnace.
10,10はバーナ装置7,7に覆設した邪魔板である
。Reference numerals 10 and 10 indicate baffle plates that cover the burner devices 7 and 7.
前記物品入口2、物品出口3の上方にはフード11,1
2を被せ、排気筒13.14を接続する。Hoods 11 and 1 are provided above the article inlet 2 and article outlet 3.
2 and connect the exhaust pipes 13 and 14.
必要により排気筒13.14にファンを設置する。If necessary, install a fan in the exhaust stack 13, 14.
次に各バーナ装置7,7間の炉体1に、物品5の通過に
邪魔にならない位置に、例えば図示の如く、炉側壁に沿
って排気筒15.15が挿入され、その下端の排気口1
5’,15%前記物品入口2、物品出口3の上縁2’,
3’と同高位置に開口する。Next, an exhaust pipe 15, 15 is inserted into the furnace body 1 between each burner device 7, 7 at a position that does not interfere with the passage of the article 5, for example, along the furnace side wall, as shown in the figure, and an exhaust port at the lower end thereof is inserted. 1
5', 15% upper edge 2' of the article inlet 2, article outlet 3,
It opens at the same height as 3'.
排気筒15.15には必要に応じファンを設ける。A fan is provided in the exhaust pipe 15.15 as required.
排気筒は図中点線で示したように両コンベアライン4,
4の中間位置に配してもよく炉体1側壁に直接開口して
もよい。The exhaust pipe is connected to both conveyor lines 4 and 4, as shown by the dotted line in the figure.
4, or may be opened directly into the side wall of the furnace body 1.
また排気筒15.15の設置は、バーナ装置7,7の1
〜複数個づつセットを組ませ、各セットのバーナ装置間
に設けられる。In addition, the installation of the exhaust pipe 15.15 is performed at one of the burner devices 7,
-Multiple sets are assembled and installed between the burner devices of each set.
炉体1の一側が閉塞されてコンベアラインがUターンし
、物品出入口が1ケ所にあるような炉体でも、閉塞端に
排気口を開口し、同様の構成ができる。Even in a furnace body in which one side of the furnace body 1 is closed, the conveyor line makes a U-turn, and there is only one article entrance/exit, a similar configuration can be made by opening an exhaust port at the closed end.
以上のように構成し、作用は次の通りである。The structure is constructed as described above, and the operation is as follows.
コンベアライン4の駆動により、物品5は次々に物品入
口2から物品出口3に向って炉内を通過する。By driving the conveyor line 4, the articles 5 pass through the furnace from the article inlet 2 to the article outlet 3 one after another.
各バーナ装置7,7は一斉に点火され、燃料の燃焼と共
に熱気が炉内に充満する。The burner devices 7, 7 are ignited all at once, and the furnace is filled with hot air as the fuel burns.
各バーナ装置7,7からの熱気は対流現象によって、よ
り高温ガスが上部に、より低温ガスが下降し、物品入口
2、物品出口3および各排気筒15.15から排出され
る。The hot air from each burner device 7, 7 is discharged from the article inlet 2, article outlet 3 and each exhaust stack 15, 15, with the hotter gas rising to the top and the cooler gas falling, due to convection phenomena.
即ち、それぞれ物昂入口2、物品出口3、排気筒15に
挾まれた炉体1の区分毎にバーナ装置7を中央部に配し
た加熱炉が構成され、これらが連続して長い炉体を形作
る。That is, a heating furnace is constructed in which a burner device 7 is arranged in the center for each section of the furnace body 1 which is sandwiched between a material inlet 2, an article outlet 3, and an exhaust pipe 15, and these continuously form a long furnace body. form.
従って各区分毎に上記した通り熱分布が均等で、安定し
ており、全体的にも熱分布が均等で安定する。Therefore, the heat distribution is uniform and stable in each section as described above, and the heat distribution is uniform and stable as a whole.
このように本発明の加熱炉は、複数のバーナ装置を適当
に配置し、1〜複数個のバーナ装置を挾んで物品入口、
物品出口および排気口が配設されるようにしたので、長
いコンベアラインを収容できる加熱炉を構成でき、直燃
式の長い炉体を実用に供することができる。In this way, the heating furnace of the present invention has a plurality of burner devices appropriately arranged, one to a plurality of burner devices being sandwiched between the article entrance,
Since the article outlet and the exhaust port are provided, a heating furnace that can accommodate a long conveyor line can be configured, and a long direct combustion type furnace body can be put to practical use.
従ってコンベアラインのスピードと加熱時間を如何よう
にも要求に応じることができ、焼付塗装、水切り乾燥工
程などを他工程と組合わせてラインに組込むことが容易
となる。Therefore, the speed and heating time of the conveyor line can be adjusted to any requirements, and it is easy to combine baking painting, draining and drying processes, etc. with other processes and incorporate them into the line.
バーナ装置の容量や長さを適当に選び、排気口間隔を適
宜限定することで炉内全体にわたる温度分布を均一な高
温状態に保つことができ、物品に対する加熱温度条件を
要求値に合わせることができる。By appropriately selecting the capacity and length of the burner device and appropriately limiting the interval between exhaust ports, the temperature distribution throughout the furnace can be maintained at a uniform high temperature, and the heating temperature conditions for the article can be adjusted to the required values. can.
炉内の気体は自然対流により温度降下したガスが物品入
口、物品出口および排気口から排出されるので常に新陳
代謝してガスの滞留がなく、焼付塗装工程に於いてシン
ナ等の溶剤の濃度増大による塗装への悪影響や爆発の危
険も防止できる。The gas in the furnace is cooled by natural convection and is discharged from the article inlet, article outlet, and exhaust port, so it is constantly metabolized and there is no accumulation of gas. It also prevents negative effects on the paint and the risk of explosion.
したがって、この炉は熱効率がよく燃料の節約となり、
使い易く設備費も く、極めて経済的で機能の勝れた
特徴ある加熱炉である。Therefore, this furnace is thermally efficient and saves fuel.
It is a unique heating furnace that is easy to use, has low equipment costs, is extremely economical, and has excellent functionality.
第1図は燃料直接燃焼方式の加熱炉の原理を示す説明図
、第2図は本発明加熱炉の一実施例を示す一部切欠いた
縦断側面図、第3図は第2図の中央部を切断した状態を
示す横断面図である。
1・・・・・・炉体、2・・・・・・物品入口、3・・
・・・・物品出口、4・・・・・・コンベアライン、5
・・・・・・品物、7・・・・・・バーナ装置、13.
14・・・・・・排気筒、15・・・・・・排気筒。Fig. 1 is an explanatory diagram showing the principle of a heating furnace of direct fuel combustion type, Fig. 2 is a partially cutaway vertical side view showing an embodiment of the heating furnace of the present invention, and Fig. 3 is a central part of Fig. 2. FIG. 2 is a cross-sectional view showing a cut state. 1... Furnace body, 2... Article inlet, 3...
... Goods exit, 4 ... Conveyor line, 5
. . . Goods, 7 . . . Burner device, 13.
14...Exhaust pipe, 15...Exhaust pipe.
Claims (1)
る品物を支持するコンベアラインを設けた自然対流方式
の加熱炉において、上記炉体は長いコンベアラインを収
容できる炉構造に構成し、上記炉体の長手方向に沿った
炉体の下床部に複数のバーナ装置を間隔をおいて配置し
、前記物品出入口の上縁を炉下床部の床面とほぼ同じ高
さに設定するとともに、前記バーナ装置は1個乃至複数
個づつがセットを組み、各セットのバーナ装置間の炉体
に前記物品出入口の上縁と略同高位置で開口する排気口
を設けたことを特徴とする加熱炉。1. In a natural convection type heating furnace equipped with a conveyor line for supporting articles to be conveyed to a nearly sealed furnace body having an article entrance/exit, the furnace body is configured to have a furnace structure that can accommodate a long conveyor line, and the furnace body has a furnace structure that can accommodate a long conveyor line. A plurality of burner devices are arranged at intervals on the lower floor of the furnace body along the longitudinal direction of the body, and the upper edge of the article entrance is set at approximately the same height as the floor surface of the lower furnace floor, The heating apparatus is characterized in that the burner apparatuses are arranged in sets of one or more burner apparatuses, and an exhaust port is provided in the furnace body between the burner apparatuses of each set and opens at a position approximately at the same height as the upper edge of the article entrance/exit. Furnace.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54162100A JPS5812513B2 (en) | 1979-12-12 | 1979-12-12 | heating furnace |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54162100A JPS5812513B2 (en) | 1979-12-12 | 1979-12-12 | heating furnace |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5685686A JPS5685686A (en) | 1981-07-11 |
JPS5812513B2 true JPS5812513B2 (en) | 1983-03-08 |
Family
ID=15748050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54162100A Expired JPS5812513B2 (en) | 1979-12-12 | 1979-12-12 | heating furnace |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5812513B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60142189A (en) * | 1983-12-29 | 1985-07-27 | 北川 教一 | Solar-ray drier |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS522140A (en) * | 1975-06-24 | 1977-01-08 | Hitachi Ltd | Information processing apparatus |
-
1979
- 1979-12-12 JP JP54162100A patent/JPS5812513B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS522140A (en) * | 1975-06-24 | 1977-01-08 | Hitachi Ltd | Information processing apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS5685686A (en) | 1981-07-11 |
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