JPH01225890A - Tunnel furnace and firing method by tunnel furnace - Google Patents
Tunnel furnace and firing method by tunnel furnaceInfo
- Publication number
- JPH01225890A JPH01225890A JP5185288A JP5185288A JPH01225890A JP H01225890 A JPH01225890 A JP H01225890A JP 5185288 A JP5185288 A JP 5185288A JP 5185288 A JP5185288 A JP 5185288A JP H01225890 A JPH01225890 A JP H01225890A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- firing
- tunnel furnace
- temperature
- trolley
- 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
- 238000010304 firing Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims description 7
- 238000005192 partition Methods 0.000 claims description 14
- 239000007789 gas Substances 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 abstract 1
- 238000009423 ventilation Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Tunnel Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は各種のセラミック製品の焼成に使用されるトン
ネル炉とトンネル炉による焼成方法に関するものである
。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tunnel furnace used for firing various ceramic products and a firing method using the tunnel furnace.
（従来の技術）
セラミック製品の焼成には従来からトンネル炉が広く使
用されており、例えば第６図に示されるようななだらか
なヒートカーブが炉内に設定され、被焼成品はこのヒー
トカーブに従って予熱、焼成、冷却されるようになって
いる。ところが周知のように、トンネル炉の炉室内には
出口側から入口側に向かう炉内風が流れるために、炉室
の横断面を取った場合その中央部と周縁部とでは温度の
不均一が不可避的に生じ、仮に焼成台車の中央に積載さ
れた被焼成品は設定されたヒートカーブに近い熱順歴を
受けることができても周縁部の被焼成品はこれとは異な
る熱履歴を受けることとなるという問題があった。また
このようなトンネル炉においては焼成台車は一定時間毎
に間歇送りされるため、個々の焼成台車上の被焼成品に
着目すると第７図のような段階的なヒートカーブで焼成
されることとなり、焼成台車の移動時には温度の急変を
避けられないという欠点もあった。(Prior art) Tunnel furnaces have traditionally been widely used for firing ceramic products. For example, a gentle heat curve as shown in Figure 6 is set in the furnace, and the fired products follow this heat curve. It is designed to be preheated, fired, and cooled. However, as is well known, since the furnace air flows from the outlet side to the inlet side in the furnace chamber of a tunnel furnace, when the cross section of the furnace chamber is taken, there is an uneven temperature between the center and the periphery. This occurs unavoidably, and even if the fired products loaded in the center of the firing cart can undergo a thermal history close to the set heat curve, the fired products at the periphery will experience a different thermal history. There was a problem. In addition, in such a tunnel furnace, the firing carts are sent intermittently at regular intervals, so if we focus on the products to be fired on the individual firing carts, they will be fired with a stepwise heat curve as shown in Figure 7. However, there was also the drawback that sudden changes in temperature could not be avoided when moving the baking cart.
（発明が解決しようとする課題）
本発明は上記のような従来の問題点を解決して、炉室の
横断面内の各部分間の温度分布のばらつきを最少限に抑
えることができ、また焼成台車を間歇送りするトンネル
炉においても個々の被焼成品をなだらかなヒートカーブ
で焼成することができるトンネル炉と、このトンネル炉
による焼成方法とを提供することを目的とするものであ
る。(Problems to be Solved by the Invention) The present invention solves the conventional problems as described above, and can minimize the variation in temperature distribution between each part in the cross section of the furnace chamber. The object of the present invention is to provide a tunnel furnace capable of firing individual products to be fired with a gentle heat curve even in a tunnel furnace in which a firing cart is sent intermittently, and a firing method using this tunnel furnace.
（課題を解決するための手段）
上記の目的を達成するために完成された本願第１の発明
は焼成台車の前後いずれか一方又は双方の上面に、炉側
壁及び天井壁に近い位置まで延びる仕切板を突設するこ
とにより、炉室内を独立した多数の小部屋に分割したこ
とを特徴とするトンネル炉であり、本願第２の発明はト
ンネル炉の炉室内を焼成台車の上面に突設した仕切板に
より独立した多数の小部屋に分割し、各小部屋内の温度
を設定初期温度から次の小部屋の設定初期温度まで徐々
に昇温又は降温させたうえで各焼成台車を移動させるこ
とにより、各焼成台車上の被焼成物を一連の連続したヒ
ートカーブにより焼成することを特徴とするものである
。(Means for Solving the Problems) The first invention of the present application, which was completed to achieve the above object, has a partition on the upper surface of either the front or rear of the firing cart, or both, extending to a position close to the furnace side wall and the ceiling wall. A tunnel furnace is characterized in that the furnace chamber is divided into a number of independent small chambers by protruding plates, and the second invention of the present application is a tunnel furnace in which the furnace chamber is protruded from the upper surface of the baking cart. Dividing into a large number of independent small rooms using partition plates, and gradually raising or lowering the temperature in each small room from the set initial temperature to the set initial temperature of the next small room, and then moving each baking cart. This method is characterized in that the objects to be fired on each firing cart are fired using a series of continuous heat curves.
（実施例）
次に本発明を図示の実施例について更に詳細に説明する
。(Embodiments) Next, the present invention will be described in more detail with reference to illustrated embodiments.
第１図と第２図は第１の発明の第１の実施例を示すもの
で、ｆｉｌはトンネル炉の炉体、（２）はその内部を間
歇送りされる焼成台車、（３）は各焼成台車（２）の上
面に構築された棚！（３ａ）と棚板（３ｂ）とからなる
棚組である。第１の発明においては、このような焼成台
車（２）の前後いずれか一方又は双方の端部の上面に仕
切板（４）が突設されている。第２図に明示されるよう
に、この仕切板（４）は炉側壁（５）及び天井壁（６）
に近い位置まで延び、その間の隙間をごく小さくしたも
のであり、このような仕切板（４）を焼成台車（２）の
上面に突設することによって炉室内が独立した多数の小
部屋（７）に分割されている。第１の実施例においては
、各焼成台車（２）の停止位置に対応させて、隣接する
小部屋（７）、（７）間を相互に連通させるためのダク
ト（８）が炉体（１１側に設けられている。ダクト（８
）は炉体（１１の天井壁（６）に吸気口（９）を開口さ
せ、また両側の炉側壁（５）の棚板（３ｂ）の下側に対
応する位置に排気口α呻を開口させたものであって、ト
ンネル炉の出口側の小部屋（７）の天井付近から吸引さ
れた炉内ガスが入口側の小部屋（７）の棚組（３）の下
側へ導入される構造となっている。なお（１１）は炉側
壁（５）に設けられたバーナーである。Figures 1 and 2 show a first embodiment of the first invention, in which fil is the furnace body of the tunnel furnace, (2) is the firing cart that is fed intermittently inside the furnace, and (3) is the furnace body of the tunnel furnace. A shelf built on the top of the baking cart (2)! This is a shelf assembly consisting of (3a) and a shelf board (3b). In the first aspect of the invention, a partition plate (4) is provided protruding from the upper surface of one or both of the front and rear ends of such a baking cart (2). As clearly shown in Figure 2, this partition plate (4) is connected to the furnace side wall (5) and ceiling wall (6).
It extends to a position close to the furnace chamber, with a very small gap between them, and by installing such a partition plate (4) protruding from the top surface of the firing cart (2), the furnace chamber is divided into many independent small chambers (7 ). In the first embodiment, a duct (8) for interconnecting adjacent small rooms (7) is provided in the furnace body (11), corresponding to the stopping position of each firing cart (2). The duct (8
) has an intake port (9) opened in the ceiling wall (6) of the furnace body (11), and an exhaust port α opened at a position corresponding to the lower side of the shelf board (3b) on both side walls (5) of the furnace. The furnace gas sucked from near the ceiling of the small room (7) on the exit side of the tunnel furnace is introduced into the lower side of the shelf assembly (3) of the small room (7) on the entrance side. Note that (11) is a burner provided on the furnace side wall (5).
第３図及び第４図に示す第２の実施例においては、焼成
台車（２）の前後両端に仕切板（４）、（４）が立設さ
れ、出口側即ち前端例の仕切板（４）の下部と、入口側
即ち後端側の仕切板（４）の上部とに通気孔（１２）、
（１３）が形成されている。そして隣接する焼成台車（
２）の各仕切板（４）、（４）間には所定幅の空間（１
４）が形成され、出口側の小部屋（７）内の炉内ガスは
上部の通気孔（１３）から排出されて空間（１４）内を
下降し、入口側の焼成台車（２）の仕切板（４）の下部
の通気孔（１２）から入口側の小部屋（７）内へ導入さ
れる構造となっている。In the second embodiment shown in FIGS. 3 and 4, partition plates (4), (4) are erected at both the front and rear ends of the baking cart (2), and the partition plates (4) are provided on the exit side, that is, at the front end. ) and the upper part of the partition plate (4) on the inlet side, that is, the rear end side, a ventilation hole (12),
(13) is formed. And the adjacent firing cart (
A space of a predetermined width (1
4) is formed, and the furnace gas in the small chamber (7) on the exit side is discharged from the upper ventilation hole (13) and descends in the space (14), and then passes through the partition of the firing cart (2) on the entrance side. It is structured so that it is introduced into the small room (7) on the entrance side through the ventilation hole (12) at the bottom of the plate (4).
（作用）
このように構成されたものは、各焼成台車（２）の棚組
（３）上に被焼成物を積載し、炉体ｆｉ＋の内部を入口
側から出口側に向って間歇的に移動させつつ予熱、焼成
、冷却の各工程を経過させ、所定のヒートカーブに従っ
た焼成を行わせるものである。しかし本発明においては
各焼成台車（２）の上面に突設された仕切板（４）によ
って炉室内を独立した多数の小部屋（７）に分割しであ
るので、従来のように炉室内を炉内風が吹抜けることが
なく、各小部屋（７）内の温度分布をそれぞれ均一化す
ることが容易に行えるようになる。しかも第１及び第２
の実施例に示されたように、各小部屋（７）、（７）間
は完全に遮断されるのではなく、それぞれダクト（８）
や空間（１４）を通じて出口側から入口側に向って炉内
ガスの移動が行われるので、焼成帯の高温の炉内ガスに
よる被焼成品の予熱等は従来のトンネル炉と同様に行う
ことができ、熱効率の低下等を招（ことはない。従って
第１の発明のトンネル炉によれば炉室の横断面内の各部
分の温度分布のばらつきを掻めて小さくすることができ
、均熱焼成を行うことができる。(Function) In the device configured as described above, the materials to be fired are loaded on the shelf set (3) of each firing cart (2), and the inside of the furnace body fi+ is intermittently moved from the inlet side to the outlet side. The process of preheating, firing, and cooling is performed while moving, and firing is performed according to a predetermined heat curve. However, in the present invention, the furnace chamber is divided into a number of independent small chambers (7) by partition plates (4) protruding from the top surface of each firing cart (2), so the furnace chamber is divided into a number of independent small chambers (7). The air inside the furnace does not blow through, and the temperature distribution in each small room (7) can be easily made uniform. Moreover, the first and second
As shown in the embodiment, each small room (7), (7) is not completely isolated, but is connected to a duct (8).
Since the furnace gas moves from the outlet side to the inlet side through the space (14), preheating of the product to be fired by the high temperature furnace gas in the firing zone can be performed in the same way as in a conventional tunnel furnace. Therefore, according to the tunnel furnace of the first invention, it is possible to reduce the dispersion of the temperature distribution in each part in the cross section of the furnace chamber, and it is possible to uniformly heat the furnace. Can be fired.
次に本願第２の発明においては、各小部屋（７）内の温
度を従来のように一定に保たず、焼成台車（２）の停止
時間中に徐々に変化させる。これを第５図により説明す
ると、ある焼成台車（２）に対応する小部屋（７）の温
度は焼成台車（２）の停止期間１．−１．中に八８で示
されるヒートカーブに沿ってＴ１からＴ：まで昇温され
る。このＴ２の温度は次の小部屋（７）における初期設
定温度である。このように昇温が行われたうえこの焼成
台車（２）は１ピフチ移動し、これと同時に（炉体（１
）に固定して考えた）元の小部屋（７）の温度はＢＣの
とおりその小部屋の初期設定温度Ｔ。Next, in the second invention of the present application, the temperature inside each small room (7) is not kept constant as in the conventional case, but is gradually changed during the stop time of the baking cart (2). To explain this with reference to FIG. 5, the temperature of the small room (7) corresponding to a certain baking cart (2) is 1. -1. The temperature is increased from T1 to T: along a heat curve indicated by 88 inside. This temperature T2 is the initial set temperature in the next small room (7). In addition to the temperature being raised in this way, the firing cart (2) moves one pift, and at the same time (furnace body (1)
) The temperature of the original small room (7) is the initial setting temperature T of that small room, as indicated by BC.
まで降温され、以下同様のサイクルを繰返す。−方、次
の小部屋（７）ではＢＤのヒートカーブに沿ってＴｔか
らＴ３へ昇温されるので、ある焼成台車（２）上に着目
した場合には被焼成品はＡ−４８−Ｄ−ｈＥのようにな
めらかなヒートカーブを描きつつ炉内を通過し、焼成が
行われることとなる。また焼成帯から冷却帯に至る部分
では第５図とは逆に降温されることは言うまでもない、
従って第２の発明によれば、個々の被焼成品を温度の急
変のないなだらかなヒートカーブで焼成できることとな
る。The temperature is then lowered to 100%, and the same cycle is repeated. - On the other hand, in the next small room (7), the temperature is raised from Tt to T3 along the heat curve of BD, so when focusing on a certain firing cart (2), the product to be fired is A-48-D. -hE, it passes through the furnace while drawing a smooth heat curve and is fired. It goes without saying that in the area from the firing zone to the cooling zone, the temperature decreases in the opposite direction to that shown in Figure 5.
Therefore, according to the second invention, each article to be fired can be fired with a gentle heat curve without sudden changes in temperature.
（発明の効果）
本発明は以上の説明からも明らかなように、炉室の内部
の温度分布のばらつきを最少限に抑えることができ、ま
た焼成台車を間歇送りするトンネル炉においても単窯に
おけると同様に個々の被焼成品をなだらかなヒートカー
ブで焼成することができる。よって本発明は従来の問題
点を一掃したトンネル炉とトンネル炉による焼成方法と
して、産業の発展に寄与するところは極めて大である。(Effects of the Invention) As is clear from the above description, the present invention can minimize the variation in temperature distribution inside the furnace chamber, and can also be used in a tunnel furnace where the firing cart is fed intermittently, compared to a single kiln. Similarly, each item to be fired can be fired with a gentle heat curve. Therefore, the present invention greatly contributes to the development of industry as a tunnel furnace and a firing method using a tunnel furnace that eliminates the problems of the conventional methods.
第１図は第１の発明の第１の実施例を示す一部切欠斜視
図、第２図はその断面図、第３図は第２の実施例を示す
一部切欠斜視図、第４図はその断面図、第５図は第２の
発明における各小部屋内の温度変化を示すグラフ、第６
図は一般のトンネル炉における設定ヒートカーブを示す
グラフ、第７図は従来のトンネル炉における個々の被焼
成品に着目した場合のヒートカーブを示すグラフである
（２）：焼成台車、（４）：仕切板、（５）；炉側壁、
（６）−天井壁、（７）：小部屋、（８）：ダクト、（
１２） 、（１３）二通気孔。FIG. 1 is a partially cutaway perspective view showing a first embodiment of the first invention, FIG. 2 is a sectional view thereof, FIG. 3 is a partially cutaway perspective view showing a second embodiment, and FIG. is a cross-sectional view thereof, FIG. 5 is a graph showing temperature changes in each small room in the second invention, and FIG.
The figure is a graph showing a heat curve set in a general tunnel furnace, and Figure 7 is a graph showing a heat curve when focusing on individual products to be fired in a conventional tunnel furnace. (2): Firing cart, (4) : Partition plate, (5); Furnace side wall,
(6) - Ceiling wall, (7): Small room, (8): Duct, (
12), (13) Two ventilation holes.
Claims (1)
に、炉側壁（５）及び天井壁（６）に近い位置まで延び
る仕切板（４）を突設することにより、炉室内を独立し
た多数の小部屋（７）に分割したことを特徴とするトン
ネル炉。 ２、各焼成台車（２）の停止位置の炉体側に、隣接する
小部屋（７）、（７）を相互に連通するダクト（８）を
形成した第１項記載のトンネル炉。 ３、各仕切板（４）に、隣接する小部屋（７）、（７）
を相互に連通する通気孔（１２）、（１３）を形成した
第１項記載のトンネル炉。 ４、トンネル炉の炉室内を焼成台車（２）の上面に突設
した仕切板（４）により独立した多数の小部屋（７）に
分割し、各小部屋（７）内の温度を設定初期温度から次
の小部屋の設定初期温度まで徐々に昇温又は降温させた
うえで各焼成台車（２）を移動させることにより、各焼
成台車（２）上の被焼成物を一連の連続したヒートカー
ブにより焼成することを特徴とするトンネル炉による焼
成方法。[Claims] 1. A partition plate (4) extending to a position close to the furnace side wall (5) and ceiling wall (6) is provided protrudingly on the upper surface of one or both of the front and rear of the baking cart (2). A tunnel furnace characterized in that the inside of the furnace chamber is divided into a number of independent small chambers (7). 2. The tunnel furnace according to item 1, wherein a duct (8) is formed on the side of the furnace body at the stop position of each firing cart (2) to communicate the adjacent small rooms (7), (7) with each other. 3. Each partition plate (4) has adjacent small rooms (7), (7)
2. The tunnel furnace according to claim 1, wherein vent holes (12) and (13) are formed to communicate with each other. 4. The furnace chamber of the tunnel furnace is divided into a number of independent small rooms (7) by a partition plate (4) protruding from the top surface of the firing cart (2), and the temperature in each small room (7) is set at the initial stage. By gradually raising or lowering the temperature from the temperature to the set initial temperature of the next small room and then moving each firing trolley (2), the objects to be fired on each firing trolley (2) are heated in a series of continuous heats. A firing method using a tunnel furnace characterized by firing in a curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5185288A JPH01225890A (en) | 1988-03-04 | 1988-03-04 | Tunnel furnace and firing method by tunnel furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5185288A JPH01225890A (en) | 1988-03-04 | 1988-03-04 | Tunnel furnace and firing method by tunnel furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01225890A true JPH01225890A (en) | 1989-09-08 |
| JPH0586555B2 JPH0586555B2 (en) | 1993-12-13 |
Family
ID=12898391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5185288A Granted JPH01225890A (en) | 1988-03-04 | 1988-03-04 | Tunnel furnace and firing method by tunnel furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01225890A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238564U (en) * | 1975-09-10 | 1977-03-18 | ||
| JPS53114562A (en) * | 1977-02-16 | 1978-10-06 | Yamashita Shoji Kk | Drying tunnel furnace of carriage type |
| JPS5626764A (en) * | 1979-08-08 | 1981-03-14 | Hiroshi Sakurai | Smoked roof tile manufacturing device |
-
1988
- 1988-03-04 JP JP5185288A patent/JPH01225890A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238564U (en) * | 1975-09-10 | 1977-03-18 | ||
| JPS53114562A (en) * | 1977-02-16 | 1978-10-06 | Yamashita Shoji Kk | Drying tunnel furnace of carriage type |
| JPS5626764A (en) * | 1979-08-08 | 1981-03-14 | Hiroshi Sakurai | Smoked roof tile manufacturing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0586555B2 (en) | 1993-12-13 |
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