【０００１】
【発明の属する技術分野】
本発明は、コークス炉の炭化室（炉）に装入された石炭粒子を乾留してコークスを製造する際に、炭化炉の炉蓋近傍部に装入された石炭粒子の昇温を促し、不良コークスの低減化を図るコークス炭化炉の加熱炉蓋に関するものである。
【０００２】
【従来の技術】
炭化炉の出入口を開閉する炉蓋は、炭化炉に装入された石炭粒子の高い乾留温度と長い乾留時間で発生する高温度の熱を保有するＣＨ４、ＣＯ２、ＣＯなどの生成ガスに曝されるため、設備管理面から耐熱性がまた公害防止面からガスシール性の高い構造物が要求されている。例えば特公昭６０−２５０７２号公報や実開平５−５６９４０号公報など多くの特許公報で紹介される様に、炭化炉の出入口に厚さ４００ｍｍ程度の大きな重量の耐火煉瓦を突出させて封印し、その周辺部の炉口枠にはナイフエッジ状断面形状のシール用部材を押圧する構造の炭化炉蓋が、多く使用されている。また最近では、特開２００１−２８８４７２号公報で紹介される様に、炭化炉に突出する耐火煉瓦の背面から出入口を閉塞するシールプレートを設けた密閉構造のコークス炉蓋が、乾留中のガスリークを著しく低減する利点から、多く使用される傾向にある。この様に炭化炉蓋は、大きな重量物の耐火煉瓦を装備する事によって高温度に耐え、長期間に渡って使用する事ができる。しかしながら、耐火煉瓦は、コークスの窯出し毎に炭化炉から解放した際に急速に冷却され、閉塞後は大量の熱を炭化炉から吸収するため、炉蓋付近に装入された石炭粒子の加熱温度が上がらず、未乾留の不良コークスを多量に発生する問題があった。
【０００３】
この様な問題から、耐火煉瓦に代わって、炭化炉側に金属板の炉内発生ガス流通室を設けさらには該炉内発生ガス流通室に加熱バーナーを内蔵した炉蓋が開発されている。例えば実公平２−２６９１３号公報や実公平２−２６９１４号公報や実開平５−８１２５９号公報などで紹介される様に「炉蓋本体に、断熱材料を鋼板で覆った断熱ボックスを介して、ガス通路の金属製遮蔽体を取付けた炭化炉の炉蓋」、さらには特開昭６３−１１２６８６号公報や特開７−２５８６４３号公報などの様に「金属製遮蔽体のガススペースすなわち炉内発生ガス流通室で、乾留中に発生する可燃性ガスの一部を空気または酸素で燃焼させる燃焼用ガス吹込みノズルを設けた、加熱式炉蓋」もある。この様に、加熱燃焼機構の炉内発生ガス流通室を炉蓋に設ける事は、それ以前の炉蓋に較べ、炉蓋付近に装入された石炭粒子の加熱を速め、不良コークスの低減化が計られる。ところが、この様な効果を有しながら開発された加熱炉蓋が、今だに実用化されない現状にある。
【０００４】
【発明が解決しようとする課題】
そこで本発明者らは、加熱炉蓋が実用化されない問題点を考察しながら、該問題点を解消する対策を講じた新しい構造のコークス加熱炉蓋を提供する事を試みた。考察した問題点の中で、上記した特開昭６３−１１２６８６号公報などの様に、炭化炉から金属製遮蔽体の炉内発生ガス流通室に流れ込む可燃性ガスの一部を炉高の高い炉内発生ガス流通室の底部に設けたノズルから吹込む空気または酸素で燃焼させる構造の炉蓋は、炉内発生ガス流通室内の温度が上がらず、炉蓋近傍部に装入された石炭粒子を加速的に加熱できない問題がある。炭化炉で発生したＣＯなどの可燃性ガスに混じって低温度のガススペースに流れ込んだ石炭粒子の微粉末が、ガススペースの可燃性ガス通気孔内やノズル上に堆積し、やがて燃焼熱でタールに変成し、該通気孔の閉塞やノズル目詰まりを引き起こす問題がある。
【０００５】
また、これまでの金属板製の炉内発生ガス流通室は、例えば特開昭５６−７００８７号公報の図面で紹介される様に、巾広い金属板同志を溶接法で繋ぎ合わせた組立構造物に製作されているため、炭化炉からコークスを窯出しする毎に繰り返される高温度（膨張）から急冷（収縮）される際に過大な熱応力を受けて歪に変形し、さらに溶接継手部から亀裂を発生するなど、実用化に供されない多くの問題を秘めていたものと考えられる。また歪に変形した金属製遮蔽体を形状矯正する事は、多大な費用と労力を要する事で問題である。本発明者らはこうした問題点を解消するために、先に、石炭粒子遮蔽用金属短冊部材を左右にガス流通間隙を設けながら縦横に配列した壁面の炉内発生ガス回遊離隔室を炉蓋構造体の炭化炉側に設ける事によって、炭化炉中央部で発生した高温度の炉内発生ガスを炉蓋側に流動させ、かつ炉蓋側に装入された石炭粒子を加熱するコークス炉蓋を開発した。
【０００６】
さらに本発明者らは、炉蓋構造体の炭化炉側に設けた炉内発生ガス回遊離隔室の加熱速度を一層改善しかつ長期間にわたって加熱機能を持続するコークス炭化炉加熱炉蓋を提供する事を目的に種々検討した結果、炉内発生ガス回遊離隔室のガス流通間隙から侵入した石炭粉塵や変成したタールによって起こる燃焼用ガスノズルの目詰まりや閉塞を防止した燃焼用ガス噴出ノズルを設けたコークス炉蓋を開発するに至った。
【０００７】
【課題を解決するための手段】
本発明のその要旨は、石炭粒子を装入する炭化炉の出入口をシールプレートを介して開閉する炉蓋構造体の炉内側に設けた断熱ボックスの炉高方向を複数段に分割する位置に横体支持枠を設け、さらに該横体支持枠の上下離隔間に石炭粒子遮蔽用金属短冊部材を左右にガス流通間隙を設けて縦横に配列した壁面体の炉内発生ガス回遊離隔室を設けると共に、上方側にガス絞りノズルを設けまた下方側に石炭粉塵落下口を設けかつ両者の間に燃焼用ガス供給源に連通する燃焼用ガス供給パイプを接続した垂直ノズルパイプを、前記炉内発生ガス回遊離隔室の炉高方向に１個または２個以上を設けて構成した、コークス炭化炉加熱炉蓋である。
【０００８】
【発明の実施の形態】
以下、本発明のコークス炭化炉加熱炉蓋について図面を参照しながら、詳細に説明する。
図１は、本発明の一実施例で、炉高方向の炉蓋断面図を示す。図１において、１はコークス炉の炭化炉である。２は炭化炉１に装入された石炭粒子である。３は、炉蓋構造体である。炉蓋構造体３は、炉体フレームの必要な部分にフランジ部材を補強した鋼鉄製枠体フレーム４で、炭化炉１の炉口枠５を押圧する薄肉耐熱鋼のシールプレート６を介して、炭化炉１の出入口７を開閉する構造に組立てられている。８は閂である。閂８は、鋼鉄製枠体フレーム４を炭化炉１の出入口７に強く押圧して締結するもので、圧縮バネや螺子ボルトなどの締結用部材を組合わせて構成されている。またシールプレート６の周縁部には、ナイフエッジ断面形状のフランジ部材９を接合すると共に、該フランジ部材９を炉口枠５に押圧するシリンダーやバネなどの進退自在な押圧機具１０が設けられている。すなわち、本発明における炉蓋構造体３は、前記した特開２００１−２８８４７２号公報らに掲載された図面と同様に、炭化炉１の出入口７を開閉しかつ締結する構造に設けられている。
【０００９】
１１は、断熱ボックスである。断熱ボックス１１は、金属製の耐熱ボックス１２にアルミナシリケート、カーボンウッド、セラミックス材など一般に使用される断熱効果の高い耐火断熱材を充填したもので、シールプレート６を介して炉蓋構造体３に、また図２で示す様に、炉内プレート１３とシールプレート６あるいはさらにスライドプレート１４を介して炉蓋構造体３に設けられている。すなわち、断熱ボックス１１は、シールプレート６を熱から防護すると共に、炉蓋構造体３から放出する熱を防止し、炭化炉１の炉蓋側を流通する炉内発生ガスの高温度の熱を維持する作用効果を奏するものである。
【００１０】
さらに本発明においては、上記の様な構造に組立てられた炉蓋構造体３に設けた断熱ボックス１１の炉内側には、該断熱ボックス１１の炉高方向を複数段に分割する位置に、石炭粒子の押圧力やその他の外圧に変形する事のない様に袋状、筒状などの抱状形状やその他中空フレームに加工または組立てられた耐熱金属材料製の強力な横体支持枠１５が設けられる。横体支持枠１５の断面形状については、特に限定するものでない。
【００１１】
１６は、前記した炉内発生ガス循環（回遊）離隔室である。炉内発生ガス回遊離隔室１６は、炭化炉１で発生した高温度の炉内発生ガスを流通（回遊）するもので、鉄鋼またはその他の耐熱性金属を板状やブロックあるいはこれらを曲げ加工して任意な矩形断面形状に成形した石炭粒子侵入遮蔽用金属短冊部材１７を、図２で示す様に、上下に離隔する横体支持枠１５の間を周面に沿って狭隘なガス流通用の間隙１８を左右に設けながら縦横に配列した壁面体の有底または無底のボックスに製作されている。また上方端部には、必要によっては天板１９あるいは排気パイプ（図示せず）に連通する排気口を設けてもよい。さらに本発明において、炉内発生ガス回遊離隔室１６の壁面体に配列される石炭粒子侵入遮蔽用金属短冊部材１７の上下端部を横体支持枠１５にボルトあるいは溶接法で取付けてもよい。また炉内発生ガス回遊離隔室１６が異常な熱膨張を起こしあるいは他の炉体設備の何かに衝突して損傷しまた歪に変形した場合に、その箇所の石炭粒子侵入遮蔽用金属短冊部材１７を個別的に取換えるだけで簡単に補修できる様に、該部材１７の上方端部を横体支持枠１５に係留する着脱自在な引っ掛け構造で取付け、また上下に配列される上下端部の双方接合側も揺動する事なく定位置で固定する様に切欠縦合構造や遊嵌構造の着脱自在な継手構造に加工してもよい。なお、本発明において、石炭粒子侵入遮蔽用金属短冊部材１７の上下端部の取付構造や継手構造については、特に限定するものでない。すなわち、本発明において炉内発生ガス回遊離隔室１６は、補修し易い構造で、かつ炉内発生ガスがガス流通間隙１８を通って該室１６を回遊し易い構造に組立てられている。
【００１２】
２０は垂直ノズルパイプで、炉内発生ガス回遊離隔室１６を回遊する炉内発生ガスを該室内で燃焼させるに必要な空気や酸素やその他可燃性（火焔）ガスなどの燃焼用ガスを噴出するもので、該炉内発生ガス回遊離隔室１６の炉高方向に１個または２個以上を設けて構成されている。図３は垂直ノズルパイプ２０の断面図を示したもので、垂直パイプ２１の上方側の口径を小さく絞る断面形状のノズル２２にする事によって、炉内発生ガス回遊離隔室１６に侵入した石炭粉塵のノズル上の堆積化とタール化を防止すると共に、ノズルから噴出される燃焼用ガスの圧力を強め落下する石炭粉塵を再び燃焼域に飛散させガス化を図る。またその反対側の下方側を大きい口径の石炭粉塵落下口２３にする事によって、垂直パイプ２１に不可避的に侵入した石炭粉塵を該パイプ２１の内壁面に付着する事なく排出落下を促し、垂直パイプ２１の閉塞を防止する。すなわち、垂直ノズルパイプ２０は、中ほどに接続された燃焼用ガス供給パイプ２４を介して連通された燃焼用ガス供給源（図示せず）から送られる燃焼用ガスが長期間安定して噴出できる様に、ガス絞りノズル２２で目詰まりを起こす事もなく、石炭粉塵落下口２３を閉塞する事も無い構造に設けられている。
また燃焼用ガス供給パイプ２４には、垂直ノズルパイプ２０のガス絞りノズル２２から噴出する燃焼用ガスの供給量を調整する開閉弁あるいは炉内発生ガス回遊離隔室１６の室内圧力と電磁弁を接続する燃焼ガス供給制御装置を設けてもよい。
【００１３】
上記の様に構成された本発明のコークス炉蓋は、従来のコークス化操業に従って、炭化炉１の出入口７をシールプレート６で密閉しつつ炉蓋構造体３で閉塞した後、石炭粒子２を炭化炉１に装入する。炭化炉１に装入された石炭粒子２は、隣接する加熱炉から供給される高温度の熱で乾留されながら、徐々にコークス化する。この時、炭化炉１の中央付近に装入された石炭粒子２から発生する高温度の熱を保有する炉内発生ガスは、炉内発生ガス回遊離隔室１６へ流動しながら炉蓋近傍部の低温度の石炭粒子２を加熱し、炉内発生ガス回遊離隔室１６に流入する。炉内発生ガス回遊離隔室１６に流入した炉内発生ガスは、垂直ノズルパイプ２０から噴出される燃焼用ガスで加熱または燃焼されながら再び高温度に加熱され、該回遊離隔室１６を回遊しながら石炭粒子侵入遮蔽用金属短冊部材１７を加熱しまたその一部が排気口から処分されながら、該部材１７を介して炉蓋近傍部に装入された石炭粒子２を加熱する。本発明は、この様に炉蓋近傍部に装入された石炭粒子２を、高温度の熱を保有して石炭粒子侵入遮蔽用金属短冊部材１７へ流動する炉内発生ガスと炉内発生ガス回遊離隔室１６に流入し燃焼用ガスで再び加熱され回遊する炉内発生ガスで挟み込む様に加熱するため、早期に乾留コークスが製造される。また炭化炉１で発生し未燃焼性ガスを含む炉内発生ガスは、炉内発生ガス回遊離隔室１６で再び燃焼されるため、無公害なガスで排出される。低温域で生成し易いタールは、高温度の熱に保持された炉内発生ガスを積極的に流動させ炭化炉内全域を高温度域に到達させる構造に構成されているため生成する事も少なく、例え生成しても凝固する事なくガス化される。
【００１４】
【発明の効果】
以上述べた様な本発明のコークス炉蓋によれば、鉄鋼などの耐熱性金属材料の石炭粒子侵入遮蔽用金属短冊部材で構成された通気性がよい炉内発生ガス回遊離隔室と該室内に設けた燃焼用ガスを噴出する垂直ノズルパイプによって、炉内発生ガス回遊離隔室内の温度が高められ、炉蓋付近に装入された石炭粒子の乾留時間を速め、不良コークスの出現を著しく低減する。また炉内発生ガス回遊離隔室のガス流通間隙から侵入した石炭粉塵またそのタールも直ちにガス化されるため、燃焼用ガスノズルの目詰まりや閉塞もなく、常に安定した操業方法で乾留コークスを製造する事ができる。さらにまた、炉内発生ガス回遊離隔室の石炭粒子侵入遮蔽用金属短冊部材の個々を着脱自在な取付構造で製作すれば、炉内発生ガス回遊離隔室が歪に変形しても、その一部の該部材を取換えられるだけで簡単に補修する事ができる特長もある。
【図面の簡単な説明】
【図１】本発明の一実施例で、炉高方向の炉蓋断面図を示す。
【図２】図１における炉蓋の炭化炉側を拡大した断面斜視図を示す。
【図３】本発明における垂直ノズルパイプの拡大断面図を示す。
【符号の説明】
１ 炭化炉
２ 石炭粒子
３ 炉蓋構造体
６ シールプレート
７ 出入口
１１ 断熱ボックス
１５ 横体支持枠
１６ 炉内発生ガス回遊離隔室
１７ 石炭粒子遮蔽用金属短冊部材
１８ ガス流通用間隙
２０ 垂直ノズルパイプ
２１ 垂直パイプ
２２ ガス絞りノズル
２３ 石炭粉塵落下口
２４ 燃焼用ガス供給パイプ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention promotes the temperature rise of the coal particles charged in the vicinity of the furnace lid of the coking furnace when carbonizing the coal particles charged in the coking chamber (furnace) of the coke oven to produce coke, The present invention relates to a heating furnace lid of a coke carbonization furnace for reducing defective coke.
[0002]
[Prior art]
The furnace lid that opens and closes the inlet and outlet of the carbonization furnace is used to generate gas such as CH 4 , CO 2 , and CO that retains the high carbonization temperature of the coal particles charged in the carbonization furnace and the high-temperature heat generated over a long carbonization time. Because of the exposure, a structure having high heat resistance is required from the viewpoint of facility management and a gas sealing property is required from the viewpoint of preventing pollution. For example, as introduced in many patent publications such as Japanese Patent Publication No. 60-25072 and Japanese Utility Model Publication No. 5-56940, a refractory brick having a large weight of about 400 mm is projected and sealed at the entrance and exit of a carbonization furnace. A carbonization furnace lid having a structure for pressing a sealing member having a knife-edge cross-sectional shape is often used in a furnace port frame in a peripheral portion thereof. Further, recently, as introduced in Japanese Patent Application Laid-Open No. 2001-288472, a coke oven lid of a closed structure provided with a seal plate for closing an entrance and an exit from the back of a refractory brick protruding into a carbonization furnace reduces gas leak during carbonization. There is a tendency to be widely used because of the advantage of remarkable reduction. In this way, the carbonization furnace lid can withstand high temperatures by being equipped with a heavy refractory brick, and can be used for a long period of time. However, the refractory brick is cooled rapidly when it is released from the carbonization furnace each time the coke is taken out of the furnace, and after closing, a large amount of heat is absorbed from the carbonization furnace. There was a problem that the temperature did not rise and a large amount of undried and defective coke was generated.
[0003]
In view of such problems, a furnace lid having a metal plate in-furnace generated gas flow chamber provided on the carbonization furnace side instead of the refractory brick and further having a built-in heating burner in the in-furnace generated gas flow chamber has been developed. For example, as described in Japanese Utility Model Publication No. 2-26913, Japanese Utility Model Publication No. 2-26914, and Japanese Utility Model Application Laid-Open No. 5-81259, "through a heat insulating box in which a heat insulating material is covered with a steel plate, As described in JP-A-63-112686 and JP-A-7-258463, "a gas space of a metal shield, that is, inside a furnace," There is also a "heating furnace lid" provided with a combustion gas injection nozzle for burning a part of the combustible gas generated during carbonization in the generated gas flow chamber with air or oxygen. In this way, the provision of the generated gas flow chamber in the furnace of the heating and combustion mechanism in the furnace lid speeds up the heating of the coal particles charged near the furnace lid and reduces defective coke compared to the furnace lid before that. Is measured. However, the heating furnace lid developed while having such an effect has not yet been put to practical use.
[0004]
[Problems to be solved by the invention]
Therefore, the present inventors have considered a problem that the heating furnace lid is not put into practical use, and have tried to provide a coke heating furnace lid having a new structure in which measures have been taken to solve the problem. Among the problems considered, as described in Japanese Patent Application Laid-Open No. 63-112686, a part of the flammable gas flowing from the carbonization furnace into the gas generation chamber in the furnace of the metal shielding body has a high furnace height. The furnace lid has a structure that burns with air or oxygen blown from a nozzle provided at the bottom of the furnace generated gas flow chamber. The temperature inside the furnace generated gas flow chamber does not rise, and the coal particles charged near the furnace lid There is a problem that heating cannot be accelerated. Fine powder of coal particles mixed with combustible gas such as CO generated in the carbonization furnace and flowing into the low-temperature gas space accumulates in the combustible gas vents of the gas space and on the nozzles, and eventually becomes tar by the heat of combustion. To cause blockage of the ventilation holes and nozzle clogging.
[0005]
Further, a gas generation chamber in a furnace made of a conventional metal plate is an assembly structure in which wide metal plates are joined together by a welding method, as shown in the drawings of Japanese Patent Application Laid-Open No. 56-70087. Since it is manufactured in a high temperature (expansion), which is repeated every time coke is discharged from the carbonization furnace, it undergoes excessive thermal stress and is deformed into strain when rapidly cooled (shrinked). It is thought that there were many problems that could not be put to practical use, such as cracks. Also, correcting the shape of a metal shield deformed into a strain is a problem because it requires a great deal of cost and labor. In order to solve these problems, the present inventors firstly formed a furnace lid gas separation chamber on the wall of a wall in which metal strip members for shielding coal particles were arranged vertically and horizontally while providing gas flow gaps on the left and right. The coke oven lid that heats the high-temperature gas generated in the center of the carbonization furnace to the furnace lid side and heats the coal particles charged in the furnace lid side developed.
[0006]
Further, the present inventors provide a coke carbonization furnace heating furnace lid that further improves the heating rate of the furnace generated gas circulation separation chamber provided on the carbonization furnace side of the furnace lid structure and maintains the heating function for a long period of time. As a result of various studies for the purpose, a combustion gas ejection nozzle was installed to prevent clogging and clogging of the combustion gas nozzle caused by coal dust and metamorphic tar entering from the gas circulation gap of the generated gas circulation compartment in the furnace. A coke oven lid was developed.
[0007]
[Means for Solving the Problems]
The gist of the present invention resides in that the entrance and exit of a carbonization furnace into which coal particles are charged are opened and closed via a seal plate. A body support frame is provided, and furthermore, a strip of metal particles for shielding coal particles is provided between the upper and lower spaces of the horizontal body support frame, and a gas flow gap is provided on the left and right sides. A vertical nozzle pipe provided with a gas throttle nozzle on the upper side, a coal dust drop port on the lower side, and a combustion gas supply pipe connected between the two to a combustion gas supply source. It is a coke carbonization furnace heating furnace lid constituted by providing one or two or more furnace separation directions in the furnace height direction.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the coke carbonization furnace heating furnace lid of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a sectional view of a furnace lid in a furnace height direction according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a carbonization furnace of a coke oven. Reference numeral 2 denotes coal particles charged into the carbonization furnace 1. 3 is a furnace lid structure. The furnace lid structure 3 is a steel frame frame 4 in which a necessary part of the furnace body frame is reinforced with a flange member, via a thin-wall heat-resistant steel seal plate 6 that presses the furnace opening frame 5 of the carbonization furnace 1. It is assembled in a structure that opens and closes the entrance 7 of the carbonization furnace 1. 8 is a bar. The bar 8 is used to fasten the steel frame 4 to the entrance 7 of the carbonization furnace 1 by strongly pressing the steel frame 4, and is configured by combining fastening members such as compression springs and screw bolts. A flange member 9 having a knife-edge cross-sectional shape is joined to the periphery of the seal plate 6, and a retractable pressing device 10 such as a cylinder or a spring for pressing the flange member 9 against the furnace opening frame 5 is provided. I have. That is, the furnace lid structure 3 according to the present invention is provided in a structure that opens and closes the inlet 7 of the carbonization furnace 1 and fastens the same as in the drawing described in JP-A-2001-288472 described above.
[0009]
11 is a heat insulation box. The heat-insulating box 11 is a heat-resistant box 12 made of metal, which is filled with a generally used fire-resistant heat-insulating material such as alumina silicate, carbon wood, or ceramics, which has a high heat-insulating effect. As shown in FIG. 2, it is provided on the furnace lid structure 3 via a furnace inner plate 13 and a seal plate 6 or a slide plate 14. That is, the heat-insulating box 11 protects the seal plate 6 from heat, prevents the heat released from the furnace lid structure 3, and removes the high-temperature heat of the gas generated in the furnace flowing on the furnace lid side of the carbonization furnace 1. It has the effect of maintaining.
[0010]
Further, in the present invention, the inside of the heat insulating box 11 provided in the furnace lid structure 3 assembled in the above-described structure has a coal position at a position where the furnace height direction of the heat insulating box 11 is divided into a plurality of stages. A strong horizontal body support frame 15 made of a heat-resistant metal material processed or assembled into a bag-shaped or cylindrical-shaped or other hollow frame so as not to be deformed by the pressing force of particles or other external pressures is provided. Can be The cross-sectional shape of the horizontal supporting frame 15 is not particularly limited.
[0011]
Reference numeral 16 denotes a chamber for separating (circulating) generated gas in the furnace. The in-furnace gas release separation chamber 16 is used to flow (migrate) high-temperature in-furnace gas generated in the carbonization furnace 1, and is formed by bending steel or other heat-resistant metal into a plate shape, a block, or a plate. As shown in FIG. 2, a metal strip member 17 for shielding coal particle intrusion formed into an arbitrary rectangular cross-sectional shape is formed between the horizontal support frames 15 vertically separated from each other for narrow gas flow along a circumferential surface. It is manufactured in a bottomed or non-bottomed box with wall bodies arranged vertically and horizontally while providing gaps 18 on the left and right. Further, an exhaust port communicating with the top plate 19 or an exhaust pipe (not shown) may be provided at the upper end as necessary. Further, in the present invention, the upper and lower ends of the metal strip member 17 for shielding the coal particles which are arranged on the wall surface of the chamber for separating generated gas in the furnace 16 may be attached to the horizontal support frame 15 by bolts or welding. Further, when the chamber for separating gas generated in the furnace causes abnormal thermal expansion or collides with something in other furnace body equipment and is damaged or deformed into a strain, a metal strip member for shielding coal intrusion at that location. The upper end of the member 17 is attached to the horizontal support frame 15 by a detachable hooking structure so that it can be easily repaired simply by replacing the individual member 17 individually. The joints on both sides may be processed into a detachable joint structure of a cut-out vertical structure or a loose fitting structure so as to be fixed at a fixed position without swinging. In the present invention, the mounting structure and the joint structure of the upper and lower ends of the metal strip member 17 for shielding coal particles from entering are not particularly limited. That is, in the present invention, the in-furnace generated gas circulation separation chamber 16 is constructed to have a structure that is easy to repair and a structure in which the in-furnace generated gas easily flows through the chamber 16 through the gas flow gap 18.
[0012]
Reference numeral 20 denotes a vertical nozzle pipe, which emits a combustion gas such as air, oxygen, or other combustible (flame) gas necessary for burning the generated gas in the furnace migrating through the chamber for releasing generated gas in the furnace. One or two or more of these chambers 16 are provided in the furnace height direction. FIG. 3 is a cross-sectional view of the vertical nozzle pipe 20. By forming a nozzle 22 having a cross-sectional shape in which the diameter of the upper side of the vertical pipe 21 is reduced to a small value, the coal dust that has entered the chamber for releasing generated gas in the furnace 16 is separated. In addition to preventing the accumulation and tar formation on the nozzle, the pressure of the combustion gas ejected from the nozzle is increased, and the coal dust that falls is scattered again into the combustion area to achieve gasification. In addition, the lower side of the opposite side is formed as a large-diameter coal dust falling port 23, so that the coal dust inevitably entering the vertical pipe 21 is urged to be discharged and dropped without adhering to the inner wall surface of the pipe 21. Blockage of the pipe 21 is prevented. That is, the vertical nozzle pipe 20 can stably emit the combustion gas sent from the combustion gas supply source (not shown) connected via the combustion gas supply pipe 24 connected in the middle for a long period of time. As described above, the gas throttle nozzle 22 is not clogged and the coal dust falling port 23 is not closed.
The combustion gas supply pipe 24 is connected to an on-off valve for adjusting the supply amount of the combustion gas ejected from the gas throttle nozzle 22 of the vertical nozzle pipe 20 or the chamber pressure of the generated gas separation chamber 16 in the furnace and an electromagnetic valve. May be provided.
[0013]
The coke oven lid of the present invention configured as described above closes the entrance 7 of the carbonization furnace 1 with the seal plate 6 and closes the coal particles 2 after closing the entrance 7 with the seal plate 6 according to the conventional coking operation. Charge into the carbonization furnace 1. The coal particles 2 charged into the carbonization furnace 1 are gradually coke while being carbonized by high-temperature heat supplied from an adjacent heating furnace. At this time, the in-furnace generated gas having high-temperature heat generated from the coal particles 2 charged near the center of the carbonization furnace 1 flows into the in-furnace generated gas recirculation chamber 16 while flowing into the in-furnace separation chamber 16. The low-temperature coal particles 2 are heated and flow into the furnace generated gas separation chamber 16. The in-furnace generated gas that has flowed into the in-furnace degassing compartment 16 is heated to a high temperature again while being heated or burned by the combustion gas ejected from the vertical nozzle pipe 20, and while circulating in the degassing compartment 16. The metal strip member 17 for shielding coal particles from entering is heated, and the coal particles 2 charged in the vicinity of the furnace lid are heated via the member 17 while disposing a part of the metal strip member 17 from the exhaust port. In the present invention, the gas generated in the furnace and the gas generated in the furnace, which flow the coal particles 2 charged in the vicinity of the furnace lid into the metal strip member 17 for holding and shielding coal particles while retaining high-temperature heat, are described. Since the mixture is heated so as to flow into the separation compartment 16 and is heated again by the combustion gas and sandwiched by the generated gas in the furnace, the carbonized coke is produced at an early stage. Further, the in-furnace generated gas including the unburned gas generated in the carbonization furnace 1 is burned again in the in-furnace generated gas recirculation chamber 16, and is discharged as a non-polluting gas. Tar, which is easily generated in the low temperature range, is less likely to be generated because it is structured so that the generated gas inside the furnace held at high temperature heat is positively flowed and the entire area inside the carbonization furnace reaches the high temperature range. Even if it is formed, it is gasified without solidification.
[0014]
【The invention's effect】
According to the coke oven lid of the present invention as described above, the gas generation separation chamber in the furnace having good air permeability composed of a metal strip member for shielding and shielding of coal particles of a heat-resistant metal material such as steel and the like are provided. The provided vertical nozzle pipe that emits combustion gas raises the temperature inside the chamber where gas generated in the furnace is separated, speeding up the carbonization time of coal particles charged near the furnace lid, and significantly reducing the appearance of defective coke. . In addition, coal dust and tar intruded from the gas flow gap of the generated gas separation compartment in the furnace are immediately gasified, so that there is no clogging or clogging of the combustion gas nozzle, and carbonized coke is always produced by a stable operation method. Can do things. Furthermore, if each of the metal strip members for shielding coal particles in the furnace generated gas separation compartment is detachably mounted, if the furnace gas separation compartment is deformed into a strain, a part of the metal strip member is deformed. There is also a feature that can be easily repaired simply by replacing the member.
[Brief description of the drawings]
FIG. 1 is a sectional view of a furnace lid in a furnace height direction according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional perspective view of the furnace lid side of FIG. 1 on the carbonization furnace side.
FIG. 3 is an enlarged sectional view of a vertical nozzle pipe according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Carbonization furnace 2 Coal particles 3 Furnace lid structure 6 Seal plate 7 Door opening 11 Insulation box 15 Horizontal support frame 16 Furnace generated gas separation compartment 17 Metal strip member for shielding coal particles 18 Gas gap 20 Vertical nozzle pipe 21 Vertical pipe 22 Gas throttle nozzle 23 Coal dust drop port 24 Gas supply pipe for combustion
