JP2012102302A - Kiln mouth structure of coke oven - Google Patents

Kiln mouth structure of coke oven Download PDF

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JP2012102302A
JP2012102302A JP2010254366A JP2010254366A JP2012102302A JP 2012102302 A JP2012102302 A JP 2012102302A JP 2010254366 A JP2010254366 A JP 2010254366A JP 2010254366 A JP2010254366 A JP 2010254366A JP 2012102302 A JP2012102302 A JP 2012102302A
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furnace
protection
coke oven
ledge
protection ledge
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Noriko Kubo
典子 久保
Shunichi Kamezaki
俊一 亀崎
Yoshiaki Kitayama
喜昭 北山
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JFE Steel Corp
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JFE Steel Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a kiln mouth structure which can exactly inhibit slack and defluxion from arising at a kiln mouth metallic material even under the influence of coke extrusion load or heat load by operation as a kiln mouth structure of a chamber oven.SOLUTION: A head plate 34 is tucked in by protection ledges 43 having a U shape, at least a part of the protection ledges 43 are located at a furnace front side (front side of furnace) from the head plate 34, and the protection ledges 43 are fixed by welding or a rivet in a position at a furnace front side (front side of furnace) from the head plate 34.

Description

本発明は、コークス炉の炉体レンガを支持する窯口金物が、操業によるコークス押出負荷や熱負荷の影響下でも、緩みや脱落を生じることのない窯口構造に関するものである。   The present invention relates to a kiln structure in which a kiln metal supporting a furnace brick of a coke oven does not loosen or fall off even under the influence of coke extrusion load or heat load due to operation.

室炉式コークス炉（以下、単に「コークス炉」ともいう）の炉前面側の部分断面平面図を図１に示す。図１に示すように、室炉式コークス炉１は多数の燃焼室３１と炭化室３２とを交互に炉幅方向に配置し構成されている。そして、燃焼室３１と炭化室３２の炉体レンガ４０は各種の金物によって表面を覆われて支持されている。これらの金物は炉体金物１１と称されており、炭化室３２の窯口１０を形成するドアフレーム３５、燃焼室３１のレンガを押さえるプロテクションレッジ３７およびプロテクションプレート３８、ヘッドプレート３４、フラッシュプレート３３、フックボルト３６、さらに燃焼室３１や炭化室３２の上部のレンガ４０を押さえる上部ウォールプレート（図示せず）、同じく下部のレンガ４０を押さえる下部ウォールプレート（図示せず）などからなっている。上記の炉体金物１１の内、窯口１０の近傍に配置されている金物（ドアフレーム３５、プロテクションレッジ３７、プロテクションプレート３８、ヘッドプレート３４、フラッシュプレート３３、フックボルト３６等）は窯口金物１２と呼ばれている。通常の操業時においては、これらの炉体金物１１をバックステー２が支持し、これを炉頂部や炉下部に配置したテンションロッド（図示せず）で締め付けて炉体３を保持している。   FIG. 1 shows a partial cross-sectional plan view of the front side of a chamber-type coke oven (hereinafter also simply referred to as “coke oven”). As shown in FIG. 1, the chamber-type coke oven 1 is configured by arranging a number of combustion chambers 31 and carbonization chambers 32 alternately in the furnace width direction. And the furnace brick 40 of the combustion chamber 31 and the carbonization chamber 32 is covered and supported by various hardware. These hardwares are referred to as furnace body hardware 11, door frame 35 that forms kiln opening 10 of carbonizing chamber 32, protection ledge 37 that holds bricks in combustion chamber 31, protection plate 38, head plate 34, and flash plate 33. , A hook bolt 36, an upper wall plate (not shown) for holding the brick 40 on the upper side of the combustion chamber 31 and the carbonization chamber 32, a lower wall plate (not shown) for holding the lower brick 40, and the like. Of the above-mentioned furnace body hardware 11, hardware (door frame 35, protection ledge 37, protection plate 38, head plate 34, flash plate 33, hook bolt 36, etc.) disposed in the vicinity of the furnace opening 10 is a furnace mouth hardware. It is called 12. During normal operation, the furnace body 11 is supported by the backstay 2 and is fastened by a tension rod (not shown) disposed at the top or bottom of the furnace to hold the furnace body 3.

ここで、図２に、室炉式コークス炉１の建設当時の健全な状態の窯口構造を示す。図２（ａ）が平面図であり、図２（ｂ）が側面図（図２（ａ）のＡ−Ａ矢視断面図）である。   Here, FIG. 2 shows a structure of the kiln mouth in a healthy state at the time of construction of the chamber furnace type coke oven 1. 2A is a plan view, and FIG. 2B is a side view (a cross-sectional view taken along the line AA in FIG. 2A).

ただし、室炉式コークス炉１では炭化室３２と燃焼室３１の部分の高さが８〜１０ｍ程度あり、また、この部分のレンガ４０は石炭の炭化に必要な１０００℃を超える高温を内部に保持するものであるから、炉体金物１１の温度も高温となるため、長期間の操業の間に炉体金物１１そのものの変形やバックステー２の変形が生じ、炉体金物１１（特に、窯口金物１２）が脱落し、炉体３の変形が進み、最終的には炉体レンガ４０が崩れるという不具合が生じる場合がある。そして、現有するコークス炉１の寿命は４０年を越えるものが多くなり、炉体３の変形、炉体レンガ４０の損耗、炉体金物１１の劣化が増加している。   However, in the chamber furnace type coke oven 1, the height of the carbonization chamber 32 and the combustion chamber 31 is about 8 to 10 m, and the brick 40 in this portion has a high temperature exceeding 1000 ° C. necessary for carbonization of coal. Since it is held, the temperature of the furnace hardware 11 also becomes high, so that during the long-term operation, the furnace hardware 11 itself and the backstay 2 are deformed, and the furnace hardware 11 (particularly the kiln 11). In some cases, the base 12) falls off, the deformation of the furnace body 3 proceeds, and finally the furnace brick 40 collapses. And the lifespan of the existing coke oven 1 exceeds 40 years, and the deformation of the furnace body 3, the wear of the furnace body bricks 40, and the deterioration of the furnace body hardware 11 are increasing.

しかし、コークス炉１の建設には膨大な費用を必要とするため、コークス炉１の寿命の延長を図ることで費用削減を達成することが指向されている。このため、変形したバックステー２の交換や、緩みや脱落が生じた炉体金物１１の補修や交換をすることにより炉体３の健全性を維持するようになってきた。   However, since the construction of the coke oven 1 requires enormous costs, it is directed to achieve cost reduction by extending the life of the coke oven 1. For this reason, the soundness of the furnace body 3 has been maintained by replacing the deformed backstay 2 or repairing or replacing the furnace body 11 that has been loosened or dropped off.

コークス炉１の炉体金物１１の緩みの多くは、部分的に破損して炭化室３２側に張り出してくるもので、さらに悪化すれば炉体金物１１が脱落するという問題が生ずる。このような場合、通常、炉体金物１１が脱落した部位にモルタルを詰めるような補修を行うが、一時的な対策に過ぎず、状況は徐々に悪化していく。   Most of the looseness of the furnace body 11 of the coke oven 1 is partially damaged and protrudes toward the carbonization chamber 32 side. If the deterioration further deteriorates, there arises a problem that the furnace body 11 falls off. In such a case, repair is usually performed by filling mortar into the part where the furnace body 11 has dropped off, but this is only a temporary measure, and the situation gradually deteriorates.

図３に、炉体３が変形し、プロテクションレッジ３７が脱落し、モルタル３９を詰めて補修を行った窯口構造を示す。図３（ａ）が平面図であり、図３（ｂ）が側面図（図３（ａ）のＡ−Ａ矢視断面図）である。図３では、すべての個所でプロテクションレッジ３７が脱落しており、その脱落部分にモルタル３９を詰めて補修しているが、多くの場合、部分的にプロテクションレッジ３７が脱落しており、プロテクションレッジ３７が残存した部分とモルタル３９で補修した部分が混在する。   FIG. 3 shows a kiln structure in which the furnace body 3 is deformed, the protection ledge 37 is dropped, and the mortar 39 is filled and repaired. 3A is a plan view, and FIG. 3B is a side view (a cross-sectional view taken along the line AA in FIG. 3A). In FIG. 3, the protection ledge 37 has dropped off at all points, and the mortar 39 has been repaired by filling the dropout portion. In many cases, however, the protection ledge 37 has partially dropped off, and the protection ledge 37 A portion where 37 remains and a portion repaired with mortar 39 coexist.

このような炉体３の異常の発生に対し、特許文献１には、バックステー２の交換時に緩んでいた炉体金物１１を固定する技術が開示されている。   With respect to the occurrence of such an abnormality of the furnace body 3, Patent Document 1 discloses a technique for fixing the furnace body hardware 11 that has been loosened when the backstay 2 is replaced.

特開２００２−３８５１号公報JP 2002-3851 A

従来、緩みや脱落が生じた炉体金物１１の補修や交換を行う際には、バックステー２を外す必要があり、このような補修・交換作業を行うと、炉体全体の締め付け力が低下し、さらに炉体温度の低下を招き、補修・交換作業そのものによる炉体劣化のリスクが伴うという新たな問題が生ずる。また、バックステー２を外す作業は特許文献１に示されているように、非常に大掛かりなものとなり、そのための費用および修理に要する日数の増大という問題がある。また、図３に示したように、炉体全体が変形しているため、新しいバックステー２が上手く取り付けられないといった問題もある。   Conventionally, it is necessary to remove the back stay 2 when repairing or replacing the furnace body 11 that has been loosened or dropped off. If such repair / replacement work is performed, the tightening force of the entire furnace body decreases. In addition, the temperature of the furnace body is further lowered, and a new problem arises that there is a risk of furnace body deterioration due to the repair and replacement work itself. Moreover, the operation | work which removes the backstay 2 becomes very big as shown in patent document 1, and there exists a problem of the increase in the cost for it, and the number of days required for repair. Moreover, as shown in FIG. 3, since the whole furnace body is deform | transforming, there also exists a problem that the new backstay 2 cannot be attached successfully.

本発明は、上記のような事情に鑑みてなされたものであり、室炉式コークス炉の窯口構造として、操業によるコークス押出負荷や熱負荷の影響下でも、窯口金物に緩みや脱落が生じることを的確に防止できる窯口構造を提供することを目的とするものである。   The present invention has been made in view of the above circumstances, and as a kiln opening structure of a chamber type coke oven, the kiln fittings are loosened or dropped even under the influence of coke extrusion load or heat load due to operation. An object of the present invention is to provide a kiln structure that can accurately prevent the occurrence.

本発明者らは、窯口金物のうち、特にプロテクションレッジに注目し、そのプロテクションレッジが緩んだり脱落したりすることを防止するために鋭意検討を重ねた。その結果、プロテクションレッジの一部をヘッドプレートより炉前面側（炉の手前側）に位置させ、そのプロテクションレッジをヘッドプレートより炉前面側（炉の手前側）の位置で固定することが有効であることを見出した。   The inventors of the present invention have paid particular attention to the protection ledge among the kiln fittings, and have made extensive studies in order to prevent the protection ledge from loosening or falling off. As a result, it is effective to place a part of the protection ledge on the front side of the furnace (front side of the furnace) from the head plate and fix the protection ledge at a position on the front side of the furnace (front side of the furnace) from the head plate. I found out.

本発明は、上記の知見に基づいてなされており、以下のような特徴を備えている。   The present invention has been made based on the above findings and has the following features.

［１］燃焼室と炭化室とを交互に炉幅方向に配置して構成され、炭化室の窯口にドアフレームと、燃焼室のレンガを押さえるプロテクションレッジおよびヘッドプレートと、フラッシュプレートとを有する室炉式コークス炉において、プロテクションレッジでヘッドプレートを挟み込み、少なくとも前記プロテクションレッジの一部が前記ヘッドプレートより炉前面側に位置し、前記ヘッドプレートより炉前面側の位置で前記プロテクションレッジが固定されていることを特徴とするコークス炉の窯口構造。   [1] The combustion chamber and the carbonization chamber are alternately arranged in the furnace width direction, and have a door frame, a protection ledge and a head plate for holding the brick in the combustion chamber, and a flash plate at the furnace port of the carbonization chamber. In a chamber-type coke oven, a head plate is sandwiched between protection ledges, at least a part of the protection ledge is located on the front side of the furnace from the head plate, and the protection ledge is fixed at a position on the front side of the furnace from the head plate. Coke oven structure of the coke oven, characterized by

［２］前記プロテクションレッジは、凹凸部を有し、その凹凸部で他の金物と噛み合わされていることを特徴とする前記［１］に記載のコークス炉の窯口構造。   [2] The kiln structure of a coke oven according to [1], wherein the protection ledge has an uneven portion, and the uneven portion engages with other hardware.

［３］前記他の金物は、ヘッドプレートとドアフレームの間隔を調整するライナーであることを特徴とする前記［２］に記載のコークス炉の窯口構造。   [3] The coke oven furnace structure according to [2], wherein the other hardware is a liner that adjusts a distance between the head plate and the door frame.

［４］前記プロテクションレッジは、高さ方向に凸部を持つプロテクションレッジ部品と高さ方向に凹部を持つプロテクションレッジ部品とが噛み合わされて、高さ方向に２個以上のプロテクションレッジ部品が連ねられて構成されていることを特徴とする前記［１］〜［３］のいずれかに記載のコークス炉の窯口構造。   [4] In the protection ledge, a protection ledge component having a convex portion in the height direction and a protection ledge component having a concave portion in the height direction are engaged with each other, and two or more protection ledge components are connected in the height direction. The coke oven kiln structure according to any one of [1] to [3], wherein the structure is configured as described above.

本発明においては、プロテクションレッジの少なくとも一部がヘッドプレートより炉前面側（炉の手前側）に位置し、炉前面側（炉の手前側）からプロテクションレッジを固定するようにしたので、プロテクションレッジの緩みや脱落が防止でき、補修頻度や補修作業が低減し、炉体の保護が達成できるという利点がある。   In the present invention, at least a part of the protection ledge is located on the front side of the furnace (front side of the furnace) from the head plate, and the protection ledge is fixed from the front side of the furnace (front side of the furnace). Can be prevented from loosening and falling off, the frequency of repairs and repair work can be reduced, and the furnace body can be protected.

コークス炉の部分断面平面図。The partial cross-sectional top view of a coke oven. 正常な窯口構造を示す平面図および側面図。The top view and side view which show a normal kiln opening structure. 炉体変形と炉体金物脱落が生じた窯口構造を示す平面図および側面図。The top view and side view which show the kiln opening structure in which the furnace body deformation | transformation and the furnace body metal fitting fell. ドアフレームを交換した窯口構造を示す平面図および側面図。The top view and side view which show the kiln opening structure which replaced the door frame. 本発明の実施形態１における窯口構造を示す平面図および側面図。The top view and side view which show the kiln opening structure in Embodiment 1 of this invention. 本発明の実施形態２における窯口構造を示す平面図、側面図および斜視図。The top view, side view, and perspective view which show the kiln opening structure in Embodiment 2 of this invention. 本発明の実施形態３における窯口構造を示す平面図、側面図および斜視図。The top view, side view, and perspective view which show the kiln opening structure in Embodiment 3 of this invention.

本発明の実施形態を図面に基づいて説明する。   Embodiments of the present invention will be described with reference to the drawings.

［実施形態１］
前述したように、図２は建設当時の健全な状態の窯口構造を示すものである。この窯口構造では、一定期間の使用を経過するとプロテクションレッジ３７が炭化室３２側に変形したり落下したりするような状態となり、窯口の補修が必要な状態になる。 [Embodiment 1]
As described above, FIG. 2 shows a healthy kiln structure at the time of construction. In this kiln structure, after a certain period of use, the protection ledge 37 is deformed or dropped to the carbonization chamber 32 side, and the kiln is required to be repaired.

そして、前述したように、図３は炉体３の変形と全てのプロテクションレッジ３７の脱落が生じた状態の窯口構造を示すものである。この状態ではドアフレーム３５が変形して、炉蓋が嵌らなくなる問題が発生し、しばしばドアフレーム３５の交換が実施されている。   As described above, FIG. 3 shows a kiln structure in a state where the furnace body 3 is deformed and all the protection ledges 37 are dropped. In this state, the door frame 35 is deformed, causing a problem that the furnace lid cannot be fitted, and the door frame 35 is often replaced.

図４に、ドアフレーム３５を交換した場合の窯口構造を示す。図４（ａ）が平面図であり、図４（ｂ）が側面図（図４（ａ）のＡ−Ａ矢視断面図）である。新品ドアフレーム３５の設置のため、ドアフレーム３５と炉体３の変形部との隙間にはヤーンロープ４１などの詰め物が入る他、ヘッドプレート３４とドアフレーム３５の間隔を調整するために、適切な厚みを持った鉄系部材のライナー４２が取り付けられる場合もある。   FIG. 4 shows a kiln structure when the door frame 35 is replaced. Fig.4 (a) is a top view, FIG.4 (b) is a side view (AA arrow sectional drawing of Fig.4 (a)). In order to install the new door frame 35, the gap between the door frame 35 and the deformed portion of the furnace body 3 is filled with a filling such as a yarn rope 41, and in order to adjust the distance between the head plate 34 and the door frame 35, In some cases, a thick iron-based liner 42 is attached.

本発明者らは、脱落したプロテクションレッジ３７の部分にモルタル３９を詰めるだけでは強度部材にならず、炉体３の変形が更に進んでしまうことと、単純にプロテクションレッジ３７と同等の部材を入れ込むだけでは、すぐにその同等部材が脱落してしまうことを確認した。   The inventors of the present invention do not become a strength member simply by filling the part of the protection ledge 37 that has fallen out, but the deformation of the furnace body 3 further progresses, and simply insert a member equivalent to the protection ledge 37. It was confirmed that the equivalent member would fall off immediately by simply inserting.

また、プロテクションレッジ３７の脱落を防止するために、プロテクションレッジ３７をヘッドプレート３４に固定することが考えられるが、燃焼室３１の奥側にあるプロテクションレッジ３７とヘッドプレート３４の間で何らかの固定処理をすることは非常に困難であることも承知している。   In order to prevent the protection ledge 37 from falling off, it may be possible to fix the protection ledge 37 to the head plate 34. However, any fixing process may be performed between the protection ledge 37 and the head plate 34 on the back side of the combustion chamber 31. I know that it is very difficult to do.

そこで、本発明者らは、鋭意検討の結果、ドアフレーム３５の交換時に炉前面側（炉の手前側）からプロテクションレッジ３７を固定し、プロテクションレッジ３７の脱落を防止することが可能であることを見出した。   Therefore, as a result of intensive studies, the present inventors are able to fix the protection ledge 37 from the furnace front side (front side of the furnace) when replacing the door frame 35 and prevent the protection ledge 37 from falling off. I found.

上記の知見に基づく、本発明の実施形態１における窯口構造を図５に示す。図５（ａ）が平面図であり、図５（ｂ）が側面図（図５（ａ）のＡ−Ａ矢視断面図）である。   The kiln structure in Embodiment 1 of this invention based on said knowledge is shown in FIG. Fig.5 (a) is a top view, FIG.5 (b) is a side view (AA arrow sectional drawing of Fig.5 (a)).

図５に示すように、この実施形態１においては、ドアフレーム３５と炉体３の変形部との隙間にヤーンロープ４１が入るとともに、ヘッドプレート３４とドアフレーム３５の間隔を調整する鉄系部材のライナー４２が取り付けられている。そして、コの字形状をしたプロテクションレッジ４３でヘッドプレート３４を挟み込み、少なくともプロテクションレッジ４３の一部がヘッドプレート３４より炉前面側（炉の手前側）に位置し、ヘッドプレート３４より炉前面側（炉の手前側）の位置でプロテクションレッジ４３が溶接またはリベットでヘッドプレート３４もしくはライナー４２に固定されている。   As shown in FIG. 5, in the first embodiment, the yarn rope 41 enters the gap between the door frame 35 and the deformed portion of the furnace body 3, and the iron-based member that adjusts the distance between the head plate 34 and the door frame 35 is used. A liner 42 is attached. Then, the head plate 34 is sandwiched between U-shaped protection ledges 43, and at least a part of the protection ledge 43 is positioned on the furnace front side (front side of the furnace) from the head plate 34, and the furnace plate side from the head plate 34. A protection ledge 43 is fixed to the head plate 34 or the liner 42 by welding or rivet at a position (on the front side of the furnace).

ちなみに、ヘッドプレート３４は燃焼室３１の幅方向左右にわたって設けられている部材であり、ヘッドプレート３４あるいはそのヘッドプレート３４に固定されているライナー４２は、直接バックステー２で固定されているので、最も炭化室３２方向に張り出しにくい部材である。したがって、そのようなヘッドプレート３４もしくはライナー４２にプロテクションレッジ４３を固定することによって、プロテクションレッジ３７の張り出し／脱落を的確に防止することができる。   Incidentally, the head plate 34 is a member provided on the left and right in the width direction of the combustion chamber 31, and the head plate 34 or the liner 42 fixed to the head plate 34 is directly fixed by the backstay 2. It is a member that hardly protrudes in the direction of the carbonization chamber 32. Therefore, by fixing the protection ledge 43 to the head plate 34 or the liner 42, the overhang / drop off of the protection ledge 37 can be prevented accurately.

なお、図５では、ライナー４２の間に１個ずつプロテクションレッジ４３が取り付けられているが、ライナー４２の間に複数個のプロテクションレッジ４３が取り付けられていても良いし、部分的にプロテクションレッジ４３が取り付けられていない箇所があっても構わない。   In FIG. 5, the protection ledges 43 are attached one by one between the liners 42, but a plurality of protection ledges 43 may be attached between the liners 42, or a part of the protection ledges 43. It does not matter if there is a part that is not attached.

また、当初のプロテクションレッジ３７が残存している箇所では、そのまま当初のプロテクションレッジ３７を採用しても構わない。   Further, the original protection ledge 37 may be used as it is at a place where the original protection ledge 37 remains.

また、劣化が進むと、プロテクションレッジ３７だけでなく、プロテクションプレート３８も脱落している場合がある。この場合はプロテクションプレート３８の部分もカバーする寸法でプロテクションレッジ４３を取り付けても良い。   Further, when the deterioration progresses, not only the protection ledge 37 but also the protection plate 38 may be dropped. In this case, the protection ledge 43 may be attached so as to cover the portion of the protection plate 38.

すなわち、プロテクションレッジ４３は、ヘッドプレート３４の炉前面側にプロテクションレッジ４３の一部があり、溶接やリベット留などで固定できる形状であれば、コの字の形状でなくても構わない。   That is, the protection ledge 43 does not have to be U-shaped as long as the protection ledge 43 has a part of the protection ledge 43 on the furnace front side of the head plate 34 and can be fixed by welding or rivet fastening.

このようにして、この実施形態１においては、プロテクションレッジ４３の少なくとも一部がヘッドプレート３４より炉前面側（炉の手前側）に位置し、炉前面側（炉の手前側）からプロテクションレッジ４３を固定することができるので、プロテクションレッジ４３の緩みや脱落が防止でき、補修頻度や補修作業が低減し、炉体３の保護が達成できるという利点がある。   In this way, in the first embodiment, at least a part of the protection ledge 43 is located on the furnace front side (front side of the furnace) from the head plate 34, and the protection ledge 43 from the furnace front side (front side of the furnace). Since the protection ledge 43 can be prevented from being loosened or dropped off, the repair frequency and repair work can be reduced, and the furnace body 3 can be protected.

［実施形態２］
本発明の実施形態２における窯口構造を図６に示す。図６（ａ）が平面図、図６（ｂ）が側面図（図６（ａ）のＢ−Ｂ矢視断面図）、図６（ｃ）が部分斜視図である。 [Embodiment 2]
The kiln structure in Embodiment 2 of this invention is shown in FIG. 6A is a plan view, FIG. 6B is a side view (a cross-sectional view taken along the line BB in FIG. 6A), and FIG. 6C is a partial perspective view.

この実施形態２における窯口構造は、上記の実施形態１における窯口構造と基本的には同様であるが、図６（ｃ）に示すように、プロテクションレッジ４４が、炉幅方向の凹部４４ａと、高さ方向の凹部４４ｂを有しており、凹部４４ａでヘッドプレート３４を挟み込むとともに、凹部４４ｂでライナー４２と噛み合わされている。   The kiln structure in the second embodiment is basically the same as the kiln structure in the first embodiment. However, as shown in FIG. 6 (c), the protection ledge 44 has a recess 44a in the furnace width direction. And a concave portion 44b in the height direction. The head plate 34 is sandwiched by the concave portion 44a and is engaged with the liner 42 by the concave portion 44b.

これによって、この実施形態２においては、プロテクションレッジ４４が他の金物（ここでは、ライナー４２）と噛み合うことで、プロテクションレッジ４４の脱落が一層防止でき、補修頻度や補修作業がさらに低減し、炉体３の保護が達成できるという利点がある。   Accordingly, in the second embodiment, the protection ledge 44 meshes with other hardware (here, the liner 42), so that the protection ledge 44 can be further prevented from falling off, and the repair frequency and repair work can be further reduced. There is an advantage that protection of the body 3 can be achieved.

［実施形態３］
本発明の実施形態３における窯口構造を図７に示す。図７（ａ）が平面図、図７（ｂ）が側面図（図７（ａ）のＢ−Ｂ矢視断面図）、図７（ｃ）が部分斜視図である。 [Embodiment 3]
The kiln structure in Embodiment 3 of this invention is shown in FIG. 7A is a plan view, FIG. 7B is a side view (a cross-sectional view taken along line BB in FIG. 7A), and FIG. 7C is a partial perspective view.

この実施形態３における窯口構造は、上記の実施形態１における窯口構造と基本的には同様であるが、図７（ｂ）に示すように、高さ方向に複数個（ここでは、３個）のプロテクションレッジ部品４６が連ねられてプロテクションレッジ４５が構成されている。このプロテクションレッジ部品４６は、図７（ｃ）に示すように、炉幅方向の凹部４６ａと、高さ方向の凸部４６ｂと、高さ方向の凹部４６ｃを有しており、凹部４６ａでヘッドプレート３４を挟み込むとともに、凹部４６ｃを他のプロテクションレッジ部品４６の凸部４６ｂと噛み合わせている。なお、最下方のプロテクションレッジ部品４６は、凹部４６ｃをライナー４２に設けた凸部４２ａと噛み合わせている。   The kiln structure in the third embodiment is basically the same as the kiln structure in the first embodiment described above, but as shown in FIG. ) Protection ledge components 46 are connected to form a protection ledge 45. As shown in FIG. 7C, the protection ledge component 46 has a concave portion 46a in the furnace width direction, a convex portion 46b in the height direction, and a concave portion 46c in the height direction. While sandwiching the plate 34, the concave portion 46 c is engaged with the convex portion 46 b of another protection ledge component 46. The lowermost protection ledge component 46 meshes with a convex portion 42 a provided on the liner 42 with a concave portion 46 c.

これによって、この実施形態３においては、プロテクションレッジ部品４６が複数個（ここでは、３個）噛み合うことでプロテクションレッジ４５が構成されているので、プロテクションレッジ４５の脱落が一層防止でき、補修頻度や補修作業がさらに低減し、炉体３の保護が達成できるという利点がある。   Accordingly, in the third embodiment, the protection ledge 45 is configured by meshing a plurality of (in this case, three) protection ledge parts 46, so that the protection ledge 45 can be further prevented from falling off. There is an advantage that the repair work is further reduced and the protection of the furnace body 3 can be achieved.

ちなみに、プロテクションレッジ部品４６を複数個組み合わしてプロテクションレッジ４５を構成しているのは、次のような理由である。すなわち、プロテクションレッジ単体の高さ方向寸法が大きいと、炉体３が変形（湾曲）している場合は嵌め込むことが難しくなる。一方、炉体３の変形防止効果の点からは、プロテクションレッジができるだけ高さ方向全体にわたって嵌め込まれていることが望ましい。そこで、高さ方向寸法を短くしたプロテクションレッジ部品４６を複数個組み合わせてプロテクションレッジ４５を構成することで、嵌め込みの容易性（施工性）と炉体３の変形防止効果を両立できるようにしている。   Incidentally, the reason why the protection ledge 45 is configured by combining a plurality of protection ledge components 46 is as follows. That is, when the height dimension of the protection ledge alone is large, it becomes difficult to fit the furnace body 3 when it is deformed (curved). On the other hand, from the viewpoint of the deformation preventing effect of the furnace body 3, it is desirable that the protection ledge is fitted over the entire height direction as much as possible. Therefore, by combining a plurality of protection ledge components 46 whose height direction dimensions are shortened to form the protection ledge 45, both the ease of fitting (workability) and the effect of preventing deformation of the furnace body 3 can be achieved. .

本発明の実施例１を述べる。   A first embodiment of the present invention will be described.

この実施例１においては、表１に示す仕様のコークス炉を用いてコークスの製造を２ヶ月間行い、窯口構造の変形（窯口構造の変化・緩み、窯口金物の脱落）の状態を経時的に観察した。また、窯口構造の変形に伴うコークス押出負荷の変化も観察して、押出負荷からも窯口構造の変形を間接的に評価した。   In this Example 1, coke was manufactured for 2 months using a coke oven having the specifications shown in Table 1, and the state of deformation of the kiln structure (change / loosening of kiln structure, dropping of kiln hardware) Observed over time. Moreover, the change of the coke extrusion load accompanying the deformation of the kiln structure was also observed, and the deformation of the kiln structure was indirectly evaluated from the extrusion load.

その際に、図４に示した従来の窯口構造の場合を従来例とし、図５に示した本発明の実施形態１における窯口構造の場合を本発明例１、図６に示した本発明の実施形態２における窯口構造の場合を本発明例２、図７に示した本発明の実施形態３における窯口構造の場合を本発明例３とした。   At that time, the case of the conventional kiln structure shown in FIG. 4 is taken as a conventional example, and the case of the kiln structure in Embodiment 1 of the present invention shown in FIG. The case of the kiln opening structure in Embodiment 2 of the invention is referred to as Invention Example 2, and the case of the kiln opening structure in Embodiment 3 of the present invention shown in FIG.

なお、窯口構造の変形の状態については、それぞれの窯口構造を新規に設置した初期のプロテクションレッジの炭化室側への張出量をゼロとして、２ヶ月間の操業後のプロテクションレッジの炭化室側への張出量をレーザー変位計で測定した。従来例における張出量を１とした場合の本発明例１〜３における張出量の相対値を表２に示す。また、コークス押出負荷については、２ヶ月間の操業後の押出機にかかる電流値を測定し、従来例における押出負荷（電流値）を１とした場合の本発明例１〜３における押出負荷（電流値）の相対値を表２に示す。   Regarding the state of deformation of the kiln opening structure, the carbonization of the protection ledge after two months of operation was set to zero with the amount of overhang of the initial protection ledge where each kiln opening structure was newly installed to the coking chamber side being zero. The amount of overhang to the room side was measured with a laser displacement meter. Table 2 shows the relative values of the overhang amounts in Invention Examples 1 to 3 when the overhang amount in the conventional example is 1. Moreover, about the coke extrusion load, the electric current value concerning the extruder after the operation for two months is measured, and the extrusion load in the present invention examples 1 to 3 when the extrusion load (current value) in the conventional example is 1. The relative values of (current value) are shown in Table 2.

表２に示すように、従来例に比べて、本発明例１〜３ではプロテクションレッジの炭化室側への張出量は小さく、そのためコークス押出負荷も小さくなっている。また、本発明例１に比べて、本発明例２、３の方が張出量とコークス押出負荷が小さく、一層効果が大きいことが認められる。   As shown in Table 2, compared with the conventional example, in Examples 1 to 3 of the present invention, the overhang amount of the protection ledge toward the carbonization chamber is small, and therefore the coke extrusion load is also small. Further, it can be seen that, compared with Invention Example 1, Invention Examples 2 and 3 have a smaller overhang amount and coke extrusion load and are more effective.

Figure 2012102302
Figure 2012102302

Figure 2012102302
Figure 2012102302

１ 室炉式コークス炉
２ バックステー
３ 炉体
１０ 窯口
１１ 炉体金物
１２ 窯口金物
３１ 燃焼室
３２ 炭化室
３３ フラッシュプレート
３４ ヘッドプレート
３５ ドアフレーム
３６ フックボルト
３７ プロテクションレッジ
３８ プロテクションプレート
３９ モルタル
４０ レンガ
４１ ヤーンロープ
４２ ライナー
４２ａ 凸部
４３ プロテクションレッジ
４４ プロテクションレッジ
４４ａ 凹部
４４ｂ 凹部
４５ プロテクションレッジ
４６ プロテクションレッジ部品
４６ａ 凹部
４６ｂ 凸部
４６ｃ 凹部 DESCRIPTION OF SYMBOLS 1 Chamber furnace type coke oven 2 Backstay 3 Furnace body 10 Kiln opening 11 Furnace body hardware 12 Furnace body hardware 31 Combustion chamber 32 Carbonization chamber 33 Flash plate 34 Head plate 35 Door frame 36 Hook bolt 37 Protection ledge 38 Protection plate 39 Mortar 40 Brick 41 Yarn Rope 42 Liner 42a Convex 43 Protection ledge 44 Protection ledge 44a Concave 44b Concave 45 Protection ledge 46 Protection ledge component 46a Concave 46b Convex 46c Concave

Claims (4)

燃焼室と炭化室とを交互に炉幅方向に配置して構成され、炭化室の窯口にドアフレームと、燃焼室のレンガを押さえるプロテクションレッジおよびヘッドプレートと、フラッシュプレートとを有する室炉式コークス炉において、プロテクションレッジでヘッドプレートを挟み込み、少なくとも前記プロテクションレッジの一部が前記ヘッドプレートより炉前面側に位置し、前記ヘッドプレートより炉前面側の位置で前記プロテクションレッジが固定されていることを特徴とするコークス炉の窯口構造。   Combustion chamber and carbonization chamber are arranged alternately in the furnace width direction, and the chamber type has a door frame, a protection ledge and a head plate for holding bricks in the combustion chamber, and a flash plate at the furnace port of the carbonization chamber. In a coke oven, the head plate is sandwiched by a protection ledge, at least a part of the protection ledge is located on the furnace front side of the head plate, and the protection ledge is fixed at a position on the furnace front side of the head plate. Coke oven structure featuring a coke oven. 前記プロテクションレッジは、凹凸部を有し、その凹凸部で他の金物と噛み合わされていることを特徴とする請求項１に記載のコークス炉の窯口構造。   The coke oven furnace structure according to claim 1, wherein the protection ledge has an uneven portion, and the uneven portion engages with other hardware. 前記他の金物は、ヘッドプレートとドアフレームの間隔を調整するライナーであることを特徴とする請求項２に記載のコークス炉の窯口構造。   The coke oven furnace structure according to claim 2, wherein the other hardware is a liner that adjusts a distance between the head plate and the door frame. 前記プロテクションレッジは、高さ方向に凸部を持つプロテクションレッジ部品と高さ方向に凹部を持つプロテクションレッジ部品とが噛み合わされて、高さ方向に２個以上のプロテクションレッジ部品が連ねられて構成されていることを特徴とする請求項１〜３のいずれかに記載のコークス炉の窯口構造。   The protection ledge is constructed by engaging a protection ledge component having a convex portion in the height direction and a protection ledge component having a concave portion in the height direction, and connecting two or more protection ledge components in the height direction. The coke oven kiln structure according to any one of claims 1 to 3, wherein the structure is a coke oven structure.
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