JPS6115996B2 - - Google Patents
Info
- Publication number
- JPS6115996B2 JPS6115996B2 JP15319980A JP15319980A JPS6115996B2 JP S6115996 B2 JPS6115996 B2 JP S6115996B2 JP 15319980 A JP15319980 A JP 15319980A JP 15319980 A JP15319980 A JP 15319980A JP S6115996 B2 JPS6115996 B2 JP S6115996B2
- Authority
- JP
- Japan
- Prior art keywords
- zone
- pressure
- cart
- kiln
- cold air
- 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
- 238000001816 cooling Methods 0.000 claims description 59
- 238000007664 blowing Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000009423 ventilation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 30
- 238000010304 firing Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 11
- 230000007423 decrease Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- 230000000875 corresponding effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Tunnel Furnaces (AREA)
Description
【発明の詳細な説明】
この発明は鍜造、圧延用の金属加熱炉、熱処理
炉および陶磁器、耐火物等の窯業製品焼成用トン
ネルキルン等として使用するために入口側から出
口側に向けて一連に予熱帯、加熱帯および冷却帯
を備えた連続工業窯炉における台車下の圧力制御
方法およびその装置に関する。DETAILED DESCRIPTION OF THE INVENTION This invention is a metal heating furnace for making and rolling, a heat treatment furnace, and a tunnel kiln for firing ceramic products such as ceramics and refractories. This invention relates to a method and device for controlling pressure under a cart in a continuous industrial kiln equipped with a pre-heating zone, a heating zone, and a cooling zone.
一般に連続工業窯炉の一種であるトンネルキル
ン（以下TKという）内雰囲気の圧力パターン
と、雰囲気ガスの流動パターンとはほゞ相関関係
にあり、共に燃料消費料等に極めて大きく影響す
る。即ちTKの性能を高めるには、TK内の燃焼
と伝熱とが合理的に行なわれなければならず、こ
れはTK内雰囲気ガスの流動に影響される。従つ
て、TK操業管理上、TK内雰囲気ガス流動およ
びTK内圧力は重要な問題である。通常、TK全
長についての圧力分布は冷却帯より焼成帯および
予熱帯に向つて低くなつているか、或いは焼成帯
と冷却帯とがほゞ頂点となり、予熱帯に向つて低
くなつているか、または焼成帯を頂点に冷却帯お
よび特に予熱帯に向つて低くなつているかのいず
れかであるが、いずれにしてもガスの主流は予熱
帯に向つて流れ、正圧状態から次第に負圧状態に
変化することゝなる。 In general, the pressure pattern of the atmosphere inside a tunnel kiln (hereinafter referred to as TK), which is a type of continuous industrial kiln, and the flow pattern of the atmospheric gas are almost correlated, and both have an extremely large effect on fuel consumption. That is, in order to improve the performance of TK, combustion and heat transfer within the TK must be performed rationally, and this is influenced by the flow of atmospheric gas within the TK. Therefore, in terms of TK operation management, the flow of atmospheric gas inside the TK and the pressure inside the TK are important issues. Usually, the pressure distribution over the entire length of the TK is lower than the cooling zone toward the firing zone and pre-heating zone, or the firing zone and cooling zone are almost at their peaks, and the pressure distribution decreases toward the pre-heating zone, or From the top of the zone to the cooling zone and especially to the pre-preparation zone, the temperature decreases, but in either case, the main flow of gas flows toward the pre-preparation zone, gradually changing from a positive pressure state to a negative pressure state. That's true.
従来のTK内の圧力制御は、主として台車の上
部（窯内）について行なわれている場合が多く、
台車下については極めてラフな圧力調整しかなさ
れておらず、台車下の圧力分布曲線を窯内の圧力
分布曲線に一致させるかまたはこれに近接させる
ように維持することは技術的に困難であつた。し
かしながら、台車の上部（窯内）と台車下との圧
力バランスが崩れると、TK本体と台車側両間の
サイドシール部および前後台車間のシール部を貫
通して台車上下間に熱ガスの漏洩または冷風侵入
を引き起し、TK内上下温度差、燃料損失および
台車下部損傷等種々の大きなトラブルが発生する
ことゝなる。即ち焼成帯および冷却帯（特に高温
部）は通常、台車下部圧力より台車上窯内圧力が
高く。従つて窯内高温ガスが台車下部に漏洩し易
くなる。その結果、燃料損失の増大と共に台車下
部例えばTK本体、台車保護耐火物、台車金物お
よび軸受部、軌条、サンドシール金物等の損傷ト
ラブルが発生し易くなる。一方、予熱帯は一般に
排ガス装置の吸引力の影響で、台車下部圧力より
台車上窯内圧力が低くなり、台車下部の冷風が台
車上窯内に侵入し、その結果、窯内上下温度差の
発生、装入製品の予熱効果の低下、燃料損失の増
大および成品々種、歩留り低下などと共に排ガス
量の増加に伴う排ガス装置の過負荷運転、消費電
力の増大等多くの問題を引きおこすことゝなる。 Conventional pressure control inside TK is often performed mainly on the upper part of the trolley (inside the kiln).
The pressure under the cart was only adjusted very roughly, and it was technically difficult to maintain the pressure distribution curve under the cart to match or be close to the pressure distribution curve inside the kiln. . However, if the pressure balance between the top of the cart (inside the kiln) and the bottom of the cart is lost, hot gas leaks between the top and bottom of the cart by penetrating the side seals between the TK body and the cart side and the seals between the front and rear carts. Otherwise, it may cause cold air to enter, causing various major problems such as temperature difference between the top and bottom inside the TK, fuel loss, and damage to the lower part of the bogie. That is, in the firing zone and the cooling zone (particularly the high temperature section), the pressure inside the kiln above the carriage is usually higher than the pressure below the carriage. Therefore, the high-temperature gas inside the kiln tends to leak to the lower part of the cart. As a result, fuel loss increases and damage to the lower part of the bogie, such as the TK main body, bogie protective refractory, bogie hardware, bearings, rails, sand seal hardware, etc., becomes more likely to occur. On the other hand, in the preheating zone, the pressure inside the kiln above the bogie is generally lower than the pressure below the bogie due to the suction force of the exhaust gas device, and the cold air from the bottom of the bogie enters the kiln on the bogie, resulting in a decrease in the temperature difference between the top and bottom inside the kiln. This causes many problems such as overload operation of the exhaust gas equipment due to the increase in the amount of exhaust gas, increased power consumption, etc., as well as a decrease in the preheating effect of the charged product, an increase in fuel loss, a decrease in product variety, and a decrease in yield. .
この発明は上記の諸点を一挙に解消するために
なされたもので、予熱帯の全域および少なくとも
高温側冷却帯の各台車真下およびまたは台車横の
空間部にそれぞれ冷風を吹込んで台車の上部と台
車下との圧力バランスを図りながら台車下を冷却
し、かつ前記冷風を有効利用してこれを今度は予
熱帯の台車真下およびまたは台車横の空間部でそ
れぞれ効果的に分散させて排風させることにより
入口側の台車下の予熱を図りながら台車上部と台
車下との圧力バランスを得て台車下圧力分布曲線
が窯内圧力分布曲線に近接し、かつ窯内圧力分布
曲線よりも下方に位置するようにした台車下の圧
力制御方法およびその装置を一般に提供すること
にある。 This invention was made in order to solve the above-mentioned problems all at once, and cool air is blown into the entire area of the preheating zone and at least into the space directly below each bogie in the high-temperature side cooling zone and/or into the space next to the bogie. To cool the bottom of a bogie while balancing the pressure with the bottom, and to effectively utilize the cold air to effectively disperse and exhaust the air directly below the bogie in a preheating zone and/or in a space next to the bogie. While preheating the underside of the cart on the entrance side, a pressure balance between the top of the cart and the bottom of the cart is obtained, so that the pressure distribution curve under the cart is close to the pressure distribution curve inside the kiln, and is located below the pressure distribution curve inside the kiln. An object of the present invention is to generally provide a pressure control method under a truck and a device thereof.
以下この発明の一実施例をTKにより説明す
る。 An embodiment of this invention will be explained below by TK.
まず本発明の台車下圧力制御法およびその装置
について説明する前に、TK内の概略構成と台車
上部の窯内圧力制御手段について略述する。 First, before explaining the undercarriage pressure control method and device of the present invention, the general structure inside the TK and the kiln internal pressure control means on the top of the cart will be briefly described.
第１図はTK１全長の構成と区分名を示す概略
図である。TK１は入口側から出口側に向けて予
熱帯Ｐと焼成帯Ｓと冷却帯Ｃの三つのゾーンによ
り構成される。予熱帯Ｐは入口カーテンP1、排煙
部P2、強制循環部P3およびその他P4にそれぞれ区
分される。特に強制循環部P3は窯内雰囲気ガスを
耐熱フアン方式またはインゼクタ方式による強制
循環方式と回収排ガスの再吹込みによるドロツプ
カーテン方式を併用して窯内ガス温度の調整と圧
力調整を行なう。さらに排煙部P2においては、予
熱帯熱ガスと装入製品との熱交換を向上させるた
めに、予熱帯排ガス孔の配置をTK入口付近に集
中して設ける。排ガス孔の配列は窯の左右両側千
鳥配列とし、配列ピツチは台車２長さと同等程度
または1/2程度とする。しかして排煙部P2では通
常負圧に調整される。 FIG. 1 is a schematic diagram showing the full length structure of TK1 and the classification names. TK1 is composed of three zones: a preheating zone P, a firing zone S, and a cooling zone C from the inlet side to the outlet side. The preparatory zone P is divided into an entrance curtain P 1 , a smoke exhaust section P 2 , a forced circulation section P 3 and a miscellaneous section P 4 . In particular, the forced circulation section P3 adjusts the gas temperature and pressure in the kiln by using a combination of a forced circulation system using a heat-resistant fan system or an injector system for atmospheric gas in the kiln, and a drop curtain system by re-blowing recovered exhaust gas. Furthermore, in the smoke exhaust section P2 , in order to improve heat exchange between the preheat hot gas and the charged product, the preheat exhaust gas holes are concentrated near the TK inlet. The exhaust gas holes are arranged in a staggered manner on both the left and right sides of the kiln, and the arrangement pitch is approximately equal to or 1/2 the length of the two carts. The pressure in the smoke exhaust section P2 is normally adjusted to negative pressure.
次に焼成帯Ｓには高負荷高速バーナをTKの両
側壁１ａに所定間隔をおいて上下千鳥に対向させ
て設け、バーナポートより窯内に噴出する高速ジ
エツト気流による窯内雰囲気ガスの引きずりまわ
し撹拌効果により窯内温度分布および窯内圧力分
布を良好ならしめ、通常正圧に維持される。 Next, in the firing zone S, high-load high-speed burners are installed on both side walls 1a of the TK in a staggered manner at a predetermined interval, and the atmospheric gas in the kiln is dragged around by the high-speed jet airflow ejected into the kiln from the burner port. The stirring effect improves the temperature distribution and pressure distribution within the kiln, and usually maintains a positive pressure.
最後に冷却帯Ｃは高温側間接冷却帯C1と直接
冷却帯C2との間接冷却帯C3出口エアーカーテン
C4とにより区分される。冷却帯Ｃでは装入製品
の冷却方式の主体として冷風および熱風の直接吹
込みによる直接冷却方式を採用し、強制対流伝熱
による冷却効果の向上と、冷却帯雰囲気の安定し
た正圧維持を図る。さた冷却帯Ｃ出口付近の低温
部にはチユーブを使用した間接冷却方式を併用す
る。さらに冷却帯最高温度、即ち焼成帯と直接冷
却部との境界部（間接冷却部C1に相当する）に
レンガ壁内を利用した間接冷却方式を採用し、焼
成帯、冷却帯間での窯内雰囲気ガスの流出入を極
力防止するための緩衝地帯を設ける。かくして予
熱帯Ｐ、焼成帯Ｓおよび冷却帯Ｃの各ゾーンの圧
力調整によつて得られた台車の上部の窯内圧力分
布曲線は第２図に示される通りのものが得られ
る。 Finally, the cooling zone C is an indirect cooling zone C3 outlet air curtain between the high temperature side indirect cooling zone C1 and the direct cooling zone C2 .
Classified by C 4 . In cooling zone C, a direct cooling method using direct blowing of cold air and hot air is adopted as the main cooling method for the charged product, improving the cooling effect through forced convection heat transfer and maintaining a stable positive pressure in the cooling zone atmosphere. . An indirect cooling method using tubes is also used in the low temperature area near the exit of cooling zone C. Furthermore, an indirect cooling method using the inside of the brick wall is adopted at the highest temperature in the cooling zone, that is, at the boundary between the firing zone and the direct cooling zone (corresponding to indirect cooling zone C1 ). A buffer zone will be provided to prevent the inflow and outflow of internal atmosphere gases as much as possible. In this way, the pressure distribution curve in the kiln at the upper part of the cart obtained by adjusting the pressure in each zone of the preheating zone P, the firing zone S, and the cooling zone C is obtained as shown in FIG.
次に台車下の圧力調整について説明する。 Next, the pressure adjustment under the truck will be explained.
窯内雰囲気圧力に対する台車下圧力の関係は非
常に重要であるから窯内雰囲気圧力に対応して台
車下圧力をバランスさせるように台車下冷却用送
排風の調節が必要となる。従つて台車下冷却用送
排風パターンは、概ね窯内雰囲気の圧力および流
動パターンに合せることが肝要となる。特に、焼
成帯および冷却帯の窯内雰囲気は通常正圧であ
り、しかも台車下部は窯内の漏洩熱ガスにより昇
温するので、台車下に冷風を送つて窯内圧力より
も若干低い正圧を維持するようにして圧力のバラ
ンスを調整すると同時に台車下の冷却帯を行なう
ことが必要である。一方、予熱帯の窯内雰囲気は
負圧であり、特に入口付近（排ガス吸引孔付近）
の窯内雰囲気は最も負圧となり、しかも台車下は
入口に近い程、低温であるため、焼成帯、冷却帯
で供給した冷風を予熱帯に送り、該冷風を予熱帯
の全域において分散して排風するか、または予熱
帯入口のエアーカーテン部P1、排煙部P2の全域お
よび強制循環部P3のTK入口側2/3においてそれ
ぞれ分散して排風するかして、圧力のバランスを
調整すると同時に予熱帯に移行する間に熱ガスと
なつた排気により台車の予熱を行なう。台車下の
圧力分布曲線は予熱帯、焼成帯および冷却帯の全
ゾーンを通じて台車上の圧力分布曲線よりも常に
下方に近接する位置に平行となるように−0.8mm
H2O以内特に好適な範囲としては０〜−0.3mmの
範囲で維持するようにするのが望ましい。台車下
への冷風吹込み、および冷風吸引は、中、高温
用工業窯炉として台車の真下の空間部のみに適用
する場合と、低温用工業窯炉として台車横の空
間部のみに適用する場合と、低、中、高温用工
業窯炉として台車の真下および台車横の空間部に
適用する場合の３通りがある。いずれの場合も本
願に適用できるが、本例ではそのうち第３の場合
を例にとつて説明する。 Since the relationship between the pressure under the cart and the atmospheric pressure inside the kiln is very important, it is necessary to adjust the air supply and exhaust for cooling under the cart so as to balance the pressure under the cart in accordance with the atmospheric pressure inside the kiln. Therefore, it is important that the air supply/exhaust pattern for cooling the undercarriage is roughly matched to the pressure and flow pattern of the atmosphere inside the kiln. In particular, the atmosphere inside the kiln in the firing zone and the cooling zone is normally at positive pressure, and the temperature at the bottom of the trolley rises due to the hot gas leaking inside the kiln. It is necessary to maintain the pressure balance and at the same time provide a cooling zone under the bogie. On the other hand, the atmosphere inside the kiln in the preheating zone is negative pressure, especially near the inlet (near the exhaust gas suction hole).
The atmosphere inside the kiln is at its most negative pressure, and the lower the car is, the closer it is to the entrance, the lower the temperature. Therefore, the cold air supplied from the firing zone and cooling zone is sent to the preheating zone, and the cold air is dispersed throughout the preheating zone. The pressure can be reduced by exhausting the air, or by discharging the air in the entire area of the air curtain section P 1 at the entrance of the pre-preparation zone, the smoke exhaust section P 2 , and the TK inlet side 2/3 of the forced circulation section P 3 . At the same time as adjusting the balance, the truck is preheated by the exhaust gas that becomes hot gas during the transition to the preheating zone. The pressure distribution curve under the truck is always parallel to the position below the pressure distribution curve on the truck throughout all zones of the preheating zone, firing zone, and cooling zone by -0.8 mm.
It is desirable to maintain it within the range of H 2 O, particularly within the range of 0 to -0.3 mm. The blowing of cold air under the cart and the suction of cold air are applied only to the space directly below the cart for medium- and high-temperature industrial kilns, and when applied only to the space next to the cart for low-temperature industrial kilns. There are three types of applications: low, medium, and high-temperature industrial kilns, which can be applied to the spaces directly below and beside the cart. Although either case can be applied to the present application, in this example, the third case will be explained as an example.
次に台車下の圧力調整についてさらに具体的に
述べる。 Next, we will discuss the pressure adjustment under the bogie in more detail.
まず焼成帯Ｓおよび冷却帯ＣのTK両側壁１ａ
と台車側面２ａとの空間部３に台車横用冷風吹込
み装置４を設ける。冷風吹込み孔４ａの配列範囲
は、焼成帯Ｓの全域および高温側間接冷却部
C1、直接（循環）冷却部C2（出口側と反対方向
の高温側相当部位）とする。こゝに冷却帯につい
ては、冷風吹込み孔４ａの配列範囲を全域とせず
に一部に限定したのは、出口側の間接冷却部C3
が冷却帯の高温側に比べて比較的低温であるため
に、焼成品および台車下に対する影響が余り問題
にならないことゝ、経済的理由を考慮したことに
基づくものである。従つて必要に応じて間接冷却
部C3についても配列するようにしてもよい。冷
風吹込み孔４ａの配列ピツチはTK１の長手方向
に沿つてその両側壁１ａにそれぞれ所定間隔例え
ば２ｍ程の間隔をおいて設置する。TKの両側壁
１ａに設置した冷風吹込み孔４ａには、TKの外
側に設置した台車横用冷風主管４ｂと該主管に冷
風を吹込むための冷風吹込みフアン４ｅを介して
該主管から分岐した台車横用冷風枝管４ｃを通
り、該枝管の途中に設けたコツク４ｄにより流量
調整されて所定量の冷風が吹込まれる。単位時間
当りの吹込み冷風量は吹込み孔の断面積と吹込み
流速と孔の配列数の積で表わされる。例えば〔孔
の断面積（10.001×10-3m2／本〕×〔吹込み流速
（20ｍ／sec）〕×〔孔の配列数（本）〕×60…（m2／
分）で示される。そして吹込み圧力は正圧例えば
150mmH2O〜200mmH2Oの範囲で調整する。一方、
台車下への熱ガスの漏洩を防止するために、焼成
帯および冷却帯に台車下冷却用送風設備５を設け
る。冷却用送風設備の設置区域は焼成帯Ｓの全域
および高温側間接冷却部C1、直接冷却部C2の全
域に亘り、台車２真下の炉床６中央部に所定間隔
例えば軌条スリツパー間820mmとした場合約6560
mmの間隔をおいて台車下用冷風枝管５ａを配設す
る。台車真下における冷風吹出し方向は、冷却帯
雰囲気ガスの誘引防止のため、最後部（冷却帯出
口側）の台車下用冷風枝管５ａの１部はTK出口
側に向け、これと隣り合う吹出し口の一部は真上
に向けて冷風吹出しとし、その他は総て予熱帯側
（TK入口側）に向けて冷風吹出しとする。台車
下用冷風枝管１組当りの冷却風量は例えば約35
m2／分とした場合、台車下用冷風枝管入口におけ
る静風圧は150mmH2O〜200mmH2Oの範囲に亘つて
調整される。図中、５ｂは台車下用冷風主管、５
ｃはダンパー、５ｄは冷風吹込み口、５ｅは冷風
吹込みフアンをそれぞれ示す。 First, TK side walls 1a of baking zone S and cooling zone C
A cold air blowing device 4 for the side of the truck is provided in a space 3 between the side surface 2a of the truck and the side surface 2a of the truck. The arrangement range of the cold air blowing holes 4a is the entire area of the firing zone S and the indirect cooling section on the high temperature side.
C 1 and direct (circulation) cooling section C 2 (corresponding to the high temperature side in the direction opposite to the outlet side). Regarding the cooling zone, the arrangement range of the cold air blowing holes 4a is not limited to the entire area, but is limited to a part of the cooling zone .
This is based on consideration of economic reasons, since the temperature is relatively low compared to the high temperature side of the cooling zone, so that the effect on the fired products and the bottom of the trolley is not much of a problem. Therefore, the indirect cooling section C3 may also be arranged as required. The cold air blowing holes 4a are arranged at predetermined intervals, for example, about 2 m, on both side walls 1a of the TK1 along the longitudinal direction. A cold air blowing hole 4a installed on both side walls 1a of the TK is connected to a cold air main pipe 4b installed outside the TK and a cold air blowing fan 4e for blowing cold air into the main pipe. A predetermined amount of cold air is blown through the horizontal cold air branch pipe 4c, and the flow rate is adjusted by a cock 4d provided in the middle of the branch pipe. The amount of cold air blown per unit time is expressed as the product of the cross-sectional area of the blow hole, the blow flow velocity, and the number of holes arranged. For example, [Cross-sectional area of holes (10.001 x 10 -3 m 2 / hole)] x [Blowing flow velocity (20 m/sec)] x [Number of holes arranged (holes)] x 60... (m 2 /
minutes). And the blowing pressure is positive pressure e.g.
Adjust within the range of 150mmH2O to 200mmH2O . on the other hand,
In order to prevent leakage of hot gas to the bottom of the cart, blower equipment 5 for cooling the bottom of the cart is provided in the firing zone and the cooling zone. The cooling air blowing equipment is installed over the entire firing zone S, the high-temperature side indirect cooling section C 1 , and the direct cooling section C 2 at a predetermined interval, for example, 820 mm between the rail slippers, in the center of the hearth 6 directly below the trolley 2. Approximately 6560 if
Cold air branch pipes 5a for under the truck are arranged at intervals of mm. In order to prevent the attraction of atmospheric gas in the cooling zone, a portion of the cold air branch pipe 5a for the bottom of the truck at the rear end (cooling zone exit side) is directed toward the TK exit side, and the air outlet adjacent to it is oriented toward the TK exit side. A part of the area will blow cold air directly upwards, and the rest will all blow cold air towards the preheating zone side (TK entrance side). For example, the cooling air volume per set of cold air branch pipes for the bottom of the truck is approximately 35
m 2 /min, the static air pressure at the inlet of the cold air branch pipe under the truck is adjusted over the range of 150 mmH 2 O to 200 mmH 2 O. In the figure, 5b is the main cold air pipe for the bottom of the truck;
c indicates a damper, 5d indicates a cold air blowing port, and 5e indicates a cold air blowing fan.
次に予熱帯側のTKに両側壁１ａと台車側面２
ａとの空間部３′に台車横用吸引排気装置７を設
ける。吸引排気装置は、TK本体の外側の両側に
その長手方向に沿つて配設した台車下用排風主管
７ａと該主管に接続する吸引排風フアン７ｂと前
記主管から所定間隔をおいて分岐した台車下用排
風枝管７ｃと該枝管の途中に設けたダンパー７ｄ
と前記枝管に接続し、TK側壁下部の両側に穿設
した排風孔７ｅとにより構成される。吸引排気装
置の設置区域は予熱帯の全域とするか、または
TK入口カーテン部P1、排煙部P2の全域および強
制循環部P3のTK入口側2/3の範囲とし、台車下
用排風枝管７ｃの配列ピツチはTK側壁の長手方
向に沿つて所定間隔をおいて設置する。例えば軌
条スリッパー間隔を820mmとした場合、約6560mm
とする。台車下用排風枝管の排風量は窯内の圧力
分布曲線に沿つた排風量に調整するが、通常予熱
帯の窯内圧力は負圧であるからこれに対応して台
車下も負圧とする。例えば排風枝管１組当りの排
風量を約40m3／分とした場合、排風枝管出口にお
ける静風圧は、負圧で150mmH2O〜200mmH2Oの範
囲で圧力調整を行なう。また予熱帯に冷風が侵入
しないようにするために、台車の真下にも台車下
排風設備８を設ける。台車下排風設備の設置区域
も吸引排気装置の設置区域と同じ区域とする。台
車下排風設備８は予熱帯の炉床６の長手方向に沿
つてその中央部に所定間隔をおいて設置した排風
垂直管８ａと該垂直管に接続する台車下用排風枝
管８ｅを該枝管の途中に設置したダンパー８ｂと
予熱帯の炉床６の長手方向に沿つて配設した台車
下用排風主管８ｃと該主管に接続した排風フアン
７ｂとよりなる。こうして台車２の真下における
空間部の圧力も窯内の圧力に対応して負圧に維持
する。 Next, on the TK on the preheating zone side, both side walls 1a and the side of the trolley 2 are installed.
A suction/exhaust device 7 for the side of the bogie is provided in the space 3' between the a and the a. The suction/exhaust device includes a main exhaust pipe 7a for under the truck, which is disposed along the longitudinal direction on both sides of the outside of the TK main body, a suction exhaust fan 7b connected to the main pipe, and branches at a predetermined interval from the main pipe. An exhaust branch pipe 7c for the bottom of the truck and a damper 7d provided in the middle of the branch pipe
and an exhaust hole 7e connected to the branch pipe and bored on both sides of the lower part of the TK side wall. The installation area of the suction/exhaust device should be the entire preparatory area, or
The entire area of the TK entrance curtain part P 1 , the smoke exhaust part P 2 and the 2/3 area on the TK entrance side of the forced circulation part P 3 is the range, and the arrangement pitch of the exhaust branch pipe 7c for the bottom of the bogie is along the longitudinal direction of the TK side wall. and set them up at specified intervals. For example, if the rail slipper spacing is 820mm, approximately 6560mm
shall be. The exhaust air volume of the exhaust branch pipe under the trolley is adjusted to follow the pressure distribution curve inside the kiln, but since the pressure inside the kiln in the preheating zone is usually negative pressure, the pressure under the trolley is also negative. shall be. For example, when the exhaust air volume per set of exhaust branch pipes is about 40 m 3 /min, the static air pressure at the outlet of the exhaust branch pipes is adjusted to a negative pressure in the range of 150 mmH 2 O to 200 mmH 2 O. Further, in order to prevent cold air from entering the preheating zone, an undercarriage ventilation facility 8 is also provided directly below the cart. The installation area of the undercarriage ventilation equipment shall be the same as the installation area of the suction exhaust equipment. The undercarriage ventilation equipment 8 includes an exhaust vertical pipe 8a installed at a predetermined interval in the center along the longitudinal direction of the hearth 6 of the preheating zone, and an undercarriage exhaust branch pipe 8e connected to the vertical pipe. It consists of a damper 8b installed in the middle of the branch pipe, a main exhaust pipe 8c for under the truck arranged along the longitudinal direction of the hearth 6 of the preheating zone, and an exhaust fan 7b connected to the main pipe. In this way, the pressure in the space directly below the cart 2 is also maintained at a negative pressure corresponding to the pressure inside the kiln.
なお、本例では図示していないが、予熱帯の終
端部と焼成帯の始端部においては、窯内圧力のバ
ランスを一層よくするために、吸引排気装置７と
冷風吹込み装置４とをオーバーラツプさせるとゝ
もに台車下排風設備８と冷却用送風設備５の両者
を適宜の範囲でオーバーラツプさせるようにして
もよい。 Although not shown in this example, the suction/exhaust device 7 and the cold air blowing device 4 are overlapped at the end of the preheating zone and the beginning of the firing zone in order to better balance the pressure inside the kiln. In this case, both the undercarriage ventilation equipment 8 and the cooling ventilation equipment 5 may be overlapped within an appropriate range.
この発明は上記の説明から判るように、予熱
帯、加熱帯および冷却帯の全ゾーンにおける台車
上部（窯内）の圧力分布曲線に対応して、各ゾー
ンでの台車下の圧力分布曲線を上記窯内圧力分布
曲線に近接させ、かつ窯内圧力よりも台車下の圧
力の方が僅かに低くなるように制御するようにし
たので、台車の上下間で圧力のバランスが得ら
れ、加熱帯および冷却帯では窯内の熱ガスの漏洩
が防止される一方、予熱帯では台車下の冷風が窯
内に侵入するのが防止されることゝなる。焼成帯
および冷却帯（特に高温部）で熱ガスの漏洩が防
止される結果、燃料消費量が低減されるととゝに
台車下部の台車保護耐火物、台車金物、軸受部、
軌条およびサンドシール金物等の各種部品に対す
る熱ガスによる損傷からも解放されるという優れ
た効果を奏する。一方、予熱帯では台車下の冷風
が台車上窯内に侵入するのが防止される結果、窯
内の上下温度差が圧力調整しない場合に比べて例
えば天井温度600℃の所において100〜150℃も小
さくなるばかりか、装入製品の予熱効果の向上、
燃料損失の低減および成品々質・歩留りが向上す
るとともに排ガス量も1/2〜1/3と少なくなり排ガ
ス装置の過負荷運転、消費電力の減少等各種優れ
た効果を奏する。また加熱帯および冷却帯の各台
車下に吹込んだ冷風は、単に台車下での圧力調整
の作用だけでなく、台車下を冷却する作用をもな
すものであり、これが予熱帯側に移行し、予熱帯
の入口側から装入したばかりの台車を適度に予熱
することができるとゝもに該予熱帯の台車下で排
ガスを分散させて排出するので窯内圧力分布曲線
への追随性が極めて良好であるなどの利点があ
る。 As can be seen from the above description, this invention creates the above pressure distribution curves under the trolley in each zone corresponding to the pressure distribution curves at the top of the trolley (inside the kiln) in all zones of the preheating zone, heating zone, and cooling zone. By controlling the pressure distribution curve in the kiln so that it is close to the pressure distribution curve, and the pressure under the cart is slightly lower than the pressure inside the kiln, the pressure is balanced between the top and bottom of the cart, and the pressure in the heating zone and The cooling zone prevents hot gas from leaking inside the kiln, while the preheating zone prevents cold air from under the cart from entering the kiln. As a result of preventing the leakage of hot gas in the firing zone and the cooling zone (especially the high temperature section), fuel consumption is reduced.
It has the excellent effect of freeing various parts such as rails and sand seal hardware from damage caused by hot gas. On the other hand, in the preheating zone, the cold air under the cart is prevented from entering the kiln above the cart, and as a result, the difference in temperature between the top and bottom inside the kiln is 100 to 150 degrees Celsius at a ceiling temperature of 600 degrees Celsius, compared to when pressure is not adjusted. Not only is it smaller, but it also improves the preheating effect of the charged product.
In addition to reducing fuel loss and improving product quality and yield, the amount of exhaust gas is reduced to 1/2 to 1/3, resulting in various excellent effects such as overload operation of exhaust gas equipment and reduction in power consumption. In addition, the cold air blown under each bogie in the heating zone and cooling zone not only has the effect of adjusting the pressure under the bogie, but also has the effect of cooling the bottom of the bogie, and this air is transferred to the preheating zone side. The cart that has just been charged from the inlet side of the preheating zone can be preheated appropriately, and the exhaust gas is dispersed and discharged under the cart in the preheating zone, making it possible to follow the pressure distribution curve inside the kiln. It has the advantage of being extremely good.
さらに本発明の有効なことは、台車を冷却する
必要性が比較的少ない低温用工業窯炉に適用する
場合は、台車横の空間部のみの圧力制御だけでよ
く、また中、高温用工業窯炉に適用する場合で窯
内の正圧あるいは負圧が比較的大きくなるときに
は、台車真下の空間部のみを圧力制御すればよ
く、従つてその用途に応じて台車下空間部の選択
的な圧力制御が可能となるということである。特
に後者の場合（中、高温用工業窯炉の場合）、窯
内高温域において台車下部が高温度となる場合に
は台車下部を積極的に冷却し得るという効果を併
有する。また台車横を台車真下の各空間部に併用
した圧力制御の場合は、低、中、高温用工業窯炉
として広範囲の用途に適用され、しかもその使用
目的に応じて一方のみに切換え使用することによ
り、単独の圧力制御ができる利点があるばかりで
なく、超高温炉での窯内高温域において台車下部
が高温度となる場合には台車下部および台車側
面、サイドシール部付近を冷却するのに極めて効
果がある。 A further advantage of the present invention is that when applied to low-temperature industrial kilns where there is relatively little need to cool the cart, it is only necessary to control the pressure in the space next to the cart; When applied to a furnace, when the positive pressure or negative pressure inside the kiln is relatively large, it is only necessary to control the pressure in the space directly below the cart, and therefore the pressure in the space under the cart can be controlled selectively depending on the application. This means that control becomes possible. Particularly in the case of the latter (in the case of medium- and high-temperature industrial kilns), it also has the effect of actively cooling the lower part of the trolley when the lower part of the trolley reaches a high temperature in the high-temperature region inside the kiln. In addition, in the case of pressure control that uses the side of the cart in combination with each space directly below the cart, it can be applied to a wide range of applications as a low, medium, and high temperature industrial kiln, and it can be switched to only one depending on the purpose of use. Not only does this have the advantage of being able to independently control the pressure, but when the lower part of the trolley becomes high in the high temperature range inside the kiln in an ultra-high temperature furnace, it is useful for cooling the lower part of the trolley, the sides of the trolley, and the vicinity of the side seal. Extremely effective.
第１図はTK全長の構成概要図、第２図は圧力
分布曲線図、第３図は焼成帯の台車下の冷風吹込
み機構を示す断面図、第４図は予熱帯の台車下の
排風機構を示す断面図、第５図ａ，ｂは１台車下
冷風吹出し管の概略構造を示す平面図および側面
図、第６図は台車下排風管の概略構造を示す平面
図および側面図、第７図は冷却帯出口側の台車真
下の冷風吹込み装置の他の実施例を示す概略図で
ある。
１……TK、１ａ……両側壁、２……台車、
３，３′……空間部、４……台車横用冷風吹込み
装置、５……台車下冷却用送風設備、７……台車
横用吸引排気装置、８……台車下排風設備。
Figure 1 is a schematic diagram of the overall length of the TK, Figure 2 is a pressure distribution curve diagram, Figure 3 is a sectional view showing the cold air blowing mechanism under the trolley in the firing zone, and Figure 4 is the exhaust gas under the trolley in the preheating zone. A sectional view showing the wind mechanism, Figures 5a and 5b are a plan view and a side view showing the schematic structure of the cold air blowing pipe under the bogie, and Fig. 6 is a plan view and side view showing the schematic structure of the wind exhaust pipe under the bogie. , FIG. 7 is a schematic view showing another embodiment of the cold air blowing device directly below the truck on the exit side of the cooling zone. 1...TK, 1a...both side walls, 2...trolley,
3, 3'... Space section, 4... Cool air blowing device for the side of the bogie, 5... Air blowing equipment for cooling under the bogie, 7... Suction and exhaust device for the side of the bogie, 8... Air exhaust equipment under the bogie.
Claims (1)
続工業窯炉において、加熱帯の全域および少なく
とも高温側冷却帯の各台車真下およびまたは台車
横の空間部にそれぞれ冷風を吹込むとともに、こ
れら各ゾーンで吹込んだ冷風を予熱帯の台車真下
およびまたは台車横の空間部に送り、ここでそれ
ぞれ分散させて排風させることにより、台車下圧
力分布曲線が窯内圧力分布曲線に接近し、かつ該
曲線よりも下方に位置するようにしたことを特徴
とする連続工業窯炉における台車下の圧力制御方
法。 ２ 予熱帯、加熱帯および冷却帯を順次備えた連
続工業窯炉において、加熱帯の全域および少なく
とも高温側冷却帯の各台車真下およびまたは台車
横の空間部にそれぞれ台車下冷却用送風設備、台
車横用冷風吹込み装置を配設し、かつこれら各ゾ
ーンで吹込んだ冷風が送られた予熱帯の台車真下
およびまたは台車横の空間部にそれぞれ台車下排
風設備、台車横用吸引排気装置を設けたことを特
徴とする連続工業窯炉における台車下の圧力制御
装置。[Scope of Claims] 1. In a continuous industrial kiln that is sequentially equipped with a preheating zone, a heating zone, and a cooling zone, cold air is supplied to the entire area of the heating zone and at least to the space directly below and to the side of each truck in the high-temperature side cooling zone. At the same time, the cold air blown in each zone is sent to the space directly below the cart in the preheating zone and/or to the side of the cart, where it is dispersed and discharged, so that the pressure distribution curve under the cart is adjusted to the pressure distribution inside the kiln. 1. A method for controlling the pressure under a cart in a continuous industrial kiln, characterized by controlling the pressure under the cart in a continuous industrial kiln, the method comprising controlling the pressure near the curve and below the curve. 2. In a continuous industrial kiln equipped with a preheating zone, a heating zone, and a cooling zone in sequence, air blowing equipment for cooling under the truck and a trolley are installed in the entire heating zone and at least in the space directly below and/or to the side of each truck in the high-temperature side cooling zone. A side cold air blowing device is installed, and the cold air blown in each zone is installed directly below the bogie in the preheating zone and/or in the space next to the bogie, with underbogie ventilation equipment and a side suction/exhaust device for the bogie. A pressure control device under a trolley in a continuous industrial kiln, characterized by being provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15319980A JPS5777879A (en) | 1980-10-31 | 1980-10-31 | Method of and apparatus for controlling pressure under truck for continuous industrial ceramic kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15319980A JPS5777879A (en) | 1980-10-31 | 1980-10-31 | Method of and apparatus for controlling pressure under truck for continuous industrial ceramic kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5777879A JPS5777879A (en) | 1982-05-15 |
| JPS6115996B2 true JPS6115996B2 (en) | 1986-04-26 |
Family
ID=15557201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15319980A Granted JPS5777879A (en) | 1980-10-31 | 1980-10-31 | Method of and apparatus for controlling pressure under truck for continuous industrial ceramic kiln |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5777879A (en) |
-
1980
- 1980-10-31 JP JP15319980A patent/JPS5777879A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5777879A (en) | 1982-05-15 |
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