JPH11223467A - Ceramic burning furnace - Google Patents
Ceramic burning furnaceInfo
- Publication number
- JPH11223467A JPH11223467A JP10027987A JP2798798A JPH11223467A JP H11223467 A JPH11223467 A JP H11223467A JP 10027987 A JP10027987 A JP 10027987A JP 2798798 A JP2798798 A JP 2798798A JP H11223467 A JPH11223467 A JP H11223467A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- zone
- firing
- burner
- ceramic
- 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.)
- Pending
Links
Landscapes
- Tunnel Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、セラミック製品の
連続焼成を行なうセラミック焼成炉に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic firing furnace for continuously firing ceramic products.
【０００２】[0002]
【従来の技術】セラミック製品の連続焼成炉は、炉体を
入口側から予熱域、焼成域、冷却域に区画し、セラミッ
ク製品を炉体内で連続的に移動させつつ焼成する炉であ
る。予熱域から焼成域に至る部分には多数のバーナー
（通常バーナー）が配置されており、炉内をセラミック
製品の焼成に必要な温度カーブとなるよう保持してい
る。また炉体内にはセラミック製品の進行方向とは逆方
向の燃焼ガス流が形成され、通常バーナーから発生する
高温の燃焼ガスは予熱域でセラミック製品やこれを保持
している窯道具と熱交換され、入口から低温ガスとなっ
て排出されるようになっている。2. Description of the Related Art A continuous firing furnace for ceramic products is a furnace in which a furnace body is divided into a preheating zone, a firing zone, and a cooling zone from an inlet side, and firing is performed while the ceramic products are continuously moved in the furnace. A large number of burners (usually burners) are arranged in a portion from the preheating zone to the firing zone, and the inside of the furnace is maintained at a temperature curve necessary for firing the ceramic product. A combustion gas flow is formed in the furnace body in the direction opposite to the direction in which the ceramic product travels, and the high-temperature combustion gas normally generated from the burner exchanges heat with the ceramic product and the kiln tools holding it in the preheating zone. , And is discharged as low-temperature gas from the inlet.
【０００３】ところが、セラミック製品の種類によって
は焼成域で高い酸素濃度を必要とするものがあり、その
ためのセラミック焼成炉では焼成域のバーナーを過剰空
気比で燃焼させるために予熱域に流れる燃焼ガスの熱量
がオーバー気味となる。このため、予熱域を所定の温度
カーブに維持するためには、焼成域の端部から高温の燃
焼ガスを排気したり、冷却風を炉内に吹き込まねばなら
ないことがある。また炉長の短いセラミック焼成炉や１
３００℃以上の高温焼成用のセラミック焼成炉でも熱量
オーバーとなって、上記と同様の手段が必要となること
がある。However, depending on the type of ceramic product, a high oxygen concentration is required in the firing zone. Therefore, in a ceramic firing furnace, the combustion gas flowing to the preheating zone in order to burn the burner in the firing zone at an excess air ratio. The amount of heat will be over. For this reason, in order to maintain the preheating zone at a predetermined temperature curve, it may be necessary to exhaust high-temperature combustion gas from the end of the firing zone or to blow cooling air into the furnace. In addition, a ceramic firing furnace with a short furnace
Even in a ceramic firing furnace for firing at a high temperature of 300 ° C. or more, the calorific value may be excessive and the same means as described above may be required.
【０００４】しかし、上記のように炉内から高温の燃焼
ガスを排気することにより温度カーブに維持しようとす
ると、熱損失が大きくなって多くの燃料費がかかるとい
う問題があり、全体入熱の５０％近くが排気損失となる
ことがあった。また高温の燃焼ガスを排気するための耐
熱金属ダクトや高温排気ファン等に、多額の設備費がか
かるという問題もあった。However, if the temperature curve is to be maintained by exhausting the high-temperature combustion gas from the furnace as described above, there is a problem that heat loss is increased and a large amount of fuel is required. Nearly 50% could result in exhaust losses. There is also a problem that a large amount of equipment cost is required for a heat-resistant metal duct for exhausting high-temperature combustion gas, a high-temperature exhaust fan, and the like.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決し、焼成域で高い酸素濃度を必要とする
場合や、炉長の短い場合にも、熱損失を最小限にとどめ
て燃料費の削減を図りつつ、所定の温度カーブに維持す
ることができるセラミック焼成炉を提供するためになさ
れたものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and minimizes heat loss even when a high oxygen concentration is required in the sintering zone or when the furnace length is short. The purpose of the present invention is to provide a ceramic firing furnace that can maintain a predetermined temperature curve while reducing fuel cost.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明は、多数の通常バーナーを備えた連
続焼成炉の焼成域の一部に、蓄熱再生式バーナーを配置
したことを特徴とするものである。特に、焼成域の温度
キープ帯の端部に、蓄熱再生式バーナーを取り付けるこ
とが好ましい。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a heat storage regeneration burner which is disposed in a part of a sintering zone of a continuous sintering furnace having a large number of normal burners. It is a feature. In particular, it is preferable to attach a heat storage regeneration burner to the end of the temperature keeping zone in the firing zone.
【０００７】この蓄熱再生式バーナーは、バーナーの燃
焼空気流路にセラミックハニカム等よりなる蓄熱体を備
えたバーナーであり、通常は２本を１組として短い周期
で燃焼動作と排気動作とを繰り返す。排気動作の際には
炉内の高温の燃焼ガスがこの蓄熱体を通過することによ
り蓄熱体が加熱され、次の燃焼動作の際には燃焼空気が
蓄熱体を通過することにより加熱され、高い熱効率が得
られるようになっている。This heat storage regeneration type burner is a burner provided with a heat storage body made of a ceramic honeycomb or the like in a combustion air flow path of the burner. Usually, two burners are set as one set and a combustion operation and an exhaust operation are repeated in a short cycle. . During the exhaust operation, the high-temperature combustion gas in the furnace passes through the heat accumulator to heat the heat accumulator, and during the next combustion operation, the combustion air passes through the heat accumulator to be heated, thereby increasing the temperature. Thermal efficiency can be obtained.
【０００８】このように、蓄熱再生式バーナーは炉内の
高温の排ガスをその場から吸引する機能を有するため、
通常バーナーを備えた連続焼成炉の焼成域の一部に蓄熱
再生式バーナーを取り付ければ、焼成域から高温の燃焼
ガスを排気するのと同様の効果を得ることができる。し
かも従来のように単に高温の燃焼ガスを排気するのでは
なく、廃熱を回収して燃焼空気の予熱に利用できるた
め、炉全体の熱損失を最小限にとどめて燃料費の削減を
図ることができる。As described above, since the heat storage regeneration type burner has a function of sucking high-temperature exhaust gas in the furnace from the place,
If a regenerative heat storage burner is attached to a part of the sintering zone of a continuous sintering furnace equipped with a normal burner, the same effect as exhausting high-temperature combustion gas from the sintering zone can be obtained. Furthermore, instead of simply exhausting high-temperature combustion gas as in the past, waste heat can be recovered and used for preheating combustion air, minimizing heat loss in the entire furnace and reducing fuel costs. Can be.
【０００９】[0009]
【発明の実施の形態】次に本発明の好ましい実施の形態
を示す。図１は本発明のセラミック焼成炉の概略的な平
面図とその温度カーブ及び酸素濃度カーブのグラフであ
る。１は炉体であり、２は予熱域、３は焼成域、４は冷
却域である。予熱域２の後半部から焼成域３の全域に、
多数の通常バーナー５が配置されている。セラミック製
品は炉体１の内部を矢印方向に進行し、下段の温度カー
ブに従って予熱、焼成、冷却が行われる。またこのセラ
ミック製品の焼成に際しては、炉内の酸素濃度を破線で
示すように７％以上の高いレベルに維持する必要がある
ものとする。Next, a preferred embodiment of the present invention will be described. FIG. 1 is a schematic plan view of a ceramic firing furnace of the present invention, and a graph of a temperature curve and an oxygen concentration curve thereof. 1 is a furnace body, 2 is a preheating zone, 3 is a firing zone, and 4 is a cooling zone. From the latter half of preheating zone 2 to the entire firing zone 3,
A number of normal burners 5 are arranged. The ceramic product advances inside the furnace body 1 in the direction of the arrow, and is preheated, fired, and cooled according to the lower temperature curve. When firing this ceramic product, it is necessary to maintain the oxygen concentration in the furnace at a high level of 7% or more as shown by a broken line.
【００１０】本発明のセラミック焼成炉では、焼成域３
の一部に、蓄熱再生式バーナー６が配置されている。蓄
熱再生式バーナー６は図２に示される通り、バーナーの
燃焼空気流路に蓄熱体７を備えたバーナーであり、炉内
から高温の燃焼ガスを吸引し蓄熱体７で熱回収しつつ炉
外に排気する機能を有するものである。図１ではこのよ
うな蓄熱再生式バーナー６が焼成域３の温度キープ帯の
端部にそれぞれ一対ずつ配置されているが、その本数は
適宜設定すればよい。[0010] In the ceramic firing furnace of the present invention, the firing zone 3
The heat storage regeneration type burner 6 is arranged in a part of. As shown in FIG. 2, the heat storage regeneration type burner 6 is a burner provided with a heat storage element 7 in a combustion air flow path of the burner. It has a function of exhausting air. In FIG. 1, a pair of such heat storage regeneration burners 6 are arranged at the ends of the temperature keeping zone in the firing zone 3, respectively, but the number thereof may be set as appropriate.
【００１１】上記のように炉内の酸素濃度を高いレベル
に維持すべきセラミック焼成炉では、焼成域３の通常バ
ーナー５を過剰空気比で燃焼させる必要があり、それに
より発生する大量の燃焼ガスが焼成域３から予熱域２に
向かって流れる。しかし焼成域３の一部に配置された蓄
熱再生式バーナー６は、炉内から高温の燃焼ガスを吸引
する機能を持つため、通常バーナー５を蓄熱再生式バー
ナー６に置き換えれば予熱域２に向かって流れる燃焼ガ
ス量を減少させる効果がある。As described above, in the ceramic firing furnace in which the oxygen concentration in the furnace is to be maintained at a high level, it is necessary to burn the normal burner 5 in the firing zone 3 at an excess air ratio, and a large amount of combustion gas generated thereby is generated. Flows from the firing zone 3 toward the preheating zone 2. However, since the regenerative burner 6 disposed in a part of the sintering zone 3 has a function of sucking high-temperature combustion gas from the furnace, if the normal burner 5 is replaced with the regenerative burner 6, the burner 6 moves toward the preheating zone 2. This has the effect of reducing the amount of combustion gas flowing.
【００１２】このため、従来のように高温の燃焼ガスを
排気したり冷却風を炉内に吹き込まなくても、目的とす
る温度カーブを保持することができる。しかも本発明に
よれば従来のように単に高温ガスを排気するのではな
く、蓄熱体７に排熱を回収して再生することができるた
め、熱損失が防止される。このような省エネルギ効果
は、蓄熱再生式バーナー６を焼成域３の温度キープ帯の
端部に配置した場合に特に顕著である。その理由は、蓄
熱再生式バーナー６は炉内のガス流に影響されることな
く所定の温度をキープすることができるためである。Therefore, the desired temperature curve can be maintained without exhausting the high-temperature combustion gas or blowing the cooling air into the furnace as in the prior art. Moreover, according to the present invention, the heat loss can be prevented since the exhaust heat can be recovered and regenerated in the heat storage unit 7 instead of simply discharging the high-temperature gas as in the related art. Such an energy saving effect is particularly remarkable when the heat storage regeneration type burner 6 is disposed at the end of the temperature keeping zone of the firing zone 3. The reason is that the heat storage regeneration type burner 6 can keep a predetermined temperature without being affected by the gas flow in the furnace.
【００１３】具体的には、長さ４０ｍのローラハースキ
ルンの焼成域３に配置されている１６本の通常バーナー
５のうち、６本を蓄熱再生式バーナー６に置き換えるこ
とにより、高温の燃焼ガスを排気していた従来のセラミ
ック焼成炉より、３０〜４０％の省エネルギを図ること
ができた。More specifically, by replacing six of the sixteen normal burners 5 disposed in the baking zone 3 of the roller hearth kiln having a length of 40 m with six regenerative burners 6, high-temperature combustion gas is obtained. 30 to 40% of energy was saved compared with the conventional ceramic firing furnace in which the gas was exhausted.
【００１４】[0014]
【発明の効果】以上に説明したように、本発明のセラミ
ック焼成炉は連続焼成炉の焼成域の一部に蓄熱再生式バ
ーナーを配置したことにより、炉全体の熱損失を最小限
にとどめて燃料費の削減を図りつつ、所定の温度カーブ
及び酸素濃度を維持することができる利点がある。As described above, in the ceramic firing furnace of the present invention, the heat storage regeneration type burner is arranged in a part of the firing area of the continuous firing furnace, thereby minimizing the heat loss of the entire furnace. There is an advantage that a predetermined temperature curve and oxygen concentration can be maintained while reducing fuel cost.
【図１】本発明のセラミック焼成炉の概略的な平面図と
その温度カーブ及び酸素濃度カーブのグラフである。FIG. 1 is a schematic plan view of a ceramic firing furnace of the present invention, and a graph of a temperature curve and an oxygen concentration curve thereof.
【図２】蓄熱再生式バーナー部分の断面図である。FIG. 2 is a sectional view of a heat storage regeneration type burner part.
１ 炉体、２ 予熱域、３ 焼成域、４ 冷却域、５
通常バーナー、６ 蓄熱再生式バーナー、７ 蓄熱体1 furnace body, 2 preheating zone, 3 firing zone, 4 cooling zone, 5
Normal burner, 6 thermal storage regeneration burner, 7 thermal storage
Claims (2)
の焼成域の一部に、蓄熱再生式バーナーを配置したこと
を特徴とするセラミック焼成炉。1. A ceramic firing furnace characterized in that a heat storage regeneration type burner is arranged in a part of a firing zone of a continuous firing furnace provided with a large number of normal burners.
生式バーナーを取り付けた請求項１に記載のセラミック
焼成炉。2. The ceramic firing furnace according to claim 1, wherein a regenerative burner is attached to an end of the temperature keeping zone in the firing zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10027987A JPH11223467A (en) | 1998-02-10 | 1998-02-10 | Ceramic burning furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10027987A JPH11223467A (en) | 1998-02-10 | 1998-02-10 | Ceramic burning furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11223467A true JPH11223467A (en) | 1999-08-17 |
Family
ID=12236199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10027987A Pending JPH11223467A (en) | 1998-02-10 | 1998-02-10 | Ceramic burning furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11223467A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1209433A2 (en) * | 2000-11-23 | 2002-05-29 | IFT S.r.l. | Intermittent combustion kiln, particularly for ceramic articles |
| EP1209432A3 (en) * | 2000-11-23 | 2003-04-23 | IFT S.r.l. | Continuous kiln particularly for ceramic articles |
| JPWO2012128172A1 (en) * | 2011-03-18 | 2014-07-24 | 日本碍子株式会社 | Tunnel kiln for firing ceramic porous bodies |
-
1998
- 1998-02-10 JP JP10027987A patent/JPH11223467A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1209433A2 (en) * | 2000-11-23 | 2002-05-29 | IFT S.r.l. | Intermittent combustion kiln, particularly for ceramic articles |
| EP1209433A3 (en) * | 2000-11-23 | 2003-04-16 | IFT S.r.l. | Intermittent combustion kiln, particularly for ceramic articles |
| EP1209432A3 (en) * | 2000-11-23 | 2003-04-23 | IFT S.r.l. | Continuous kiln particularly for ceramic articles |
| JPWO2012128172A1 (en) * | 2011-03-18 | 2014-07-24 | 日本碍子株式会社 | Tunnel kiln for firing ceramic porous bodies |
| JP5879629B2 (en) * | 2011-03-18 | 2016-03-08 | 日本碍子株式会社 | Tunnel kiln for firing ceramic porous bodies |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040116 |