JP2010280808A - Coke oven fuel gas mixing device - Google Patents

Coke oven fuel gas mixing device Download PDF

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JP2010280808A
JP2010280808A JP2009135080A JP2009135080A JP2010280808A JP 2010280808 A JP2010280808 A JP 2010280808A JP 2009135080 A JP2009135080 A JP 2009135080A JP 2009135080 A JP2009135080 A JP 2009135080A JP 2010280808 A JP2010280808 A JP 2010280808A
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gas
coke oven
fuel gas
flow path
passage
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JP5487729B2 (en
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Toshiyuki Mayumi
敏行 真弓
Yasuaki Koyanagi
保章 小柳
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JFE Steel Corp
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JFE Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a coke oven fuel gas mixing device by which mixing of a fuel gas is completed in a shorter distance. <P>SOLUTION: A mixer 12 includes a frame body 13 attached to a wall part of a passage 20 and a plurality of blades 14 erected from the frame body 13 toward an inside in a radial direction of the passage 20 and giving whirl directions to the fuel gas flowing in the passage 20. Thereby, whirls are generated in the fuel gas flowing in the passage 20 and the fuel gas is mixed in a shorter distance by the whirls. A feeder 15 includes a flow-in pipe 16 making a coke oven gas flow in a direction reverse to the direction of a blast furnace gas flowing in the passage 20 and a baffle 17 disposed opposite to a gas outlet of the flow-in pipe 16 at a prescribed interval from the gas outlet. Thereby, the coke oven gas colliding against the baffle 17 from the flow-in pipe 16 is diffused on the outer side in the radial direction of the passage, a turbulent flow is generated between the blast furnace gas flowing in the passage 20 and the coke oven gas, and the fuel gas is mixed in the shorter distance by the turbulent flow. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、コークス炉の燃焼室に供給する燃料ガスの混合装置に関し、特にコークス炉ガスと高炉ガスを混合して燃料ガスとする場合に好適なものである。   The present invention relates to an apparatus for mixing fuel gas supplied to a combustion chamber of a coke oven, and is particularly suitable when mixing coke oven gas and blast furnace gas into a fuel gas.

コークス炉は、炭化室内の石炭を乾留して、還元材として高炉に投入するコークスを製造するものであり、炭化室や燃焼室を夫々複数基備え、予熱した燃料ガスを燃焼室で燃焼して炭化室内の石炭を乾留する。コークス炉の操業では、均一な品質のコークスを製造することが重要であり、複数の炭化室間お及び各炭化室内の温度分布調整を燃料ガスの燃焼制御によって行う。この燃料ガスには、コークス炉から回収されるコークス炉ガスが適するが、燃焼制御を行うには発熱量が大き過ぎる。そのため、不燃性の高炉ガスと混合して燃料ガスとする。このコークス炉ガスと高炉ガスの混合装置並びに燃料ガスの供給方法として、下記特許文献１に記載されるものがある。この特許文献１に記載される燃料ガス供給方法は、コークス炉ガスと高炉ガスを燃料ガスの流れ方向直角断面において均一に混合した後、燃料ガスのガスカロリーを計測するようにしている。また、管路中を流れる高炉ガスにコークス炉ガスを投入して両者を混合する場合に、管路の断面中央部と壁部にコークス炉ガスを投入することで、両者がより効率よく混合されるようにしている。   The coke oven produces coke by carbonizing the coal in the carbonization chamber and throwing it into the blast furnace as a reducing material. The coke oven is equipped with multiple carbonization chambers and combustion chambers each for burning preheated fuel gas in the combustion chamber. Carbonize the coal in the carbonization chamber. In the operation of a coke oven, it is important to produce coke of uniform quality, and temperature distribution adjustment between a plurality of carbonization chambers and in each carbonization chamber is performed by combustion control of fuel gas. A coke oven gas recovered from the coke oven is suitable for this fuel gas, but the calorific value is too large for combustion control. Therefore, it is mixed with nonflammable blast furnace gas to make fuel gas. As a coke oven gas and blast furnace gas mixing device and a fuel gas supply method, there is one described in Patent Document 1 below. In the fuel gas supply method described in Patent Document 1, coke oven gas and blast furnace gas are uniformly mixed in a cross section perpendicular to the fuel gas flow direction, and then the gas calorie of the fuel gas is measured. In addition, when the coke oven gas is introduced into the blast furnace gas flowing in the pipe and mixed with each other, the coke oven gas is introduced into the center and the wall of the cross section of the pipe so that both are mixed more efficiently. I try to do it.

特開２００７−８９７９号公報JP 2007-8979 A

しかしながら、前記特許文献１に記載されるコークス炉燃料ガス混合装置では、コークス炉ガスと高炉ガスが完全に混合するまでに管路中の距離が必要であり、より短い距離で２つのガスの混合が完了するコークス炉燃料ガス混合装置が望まれている。
本発明は、上記のような問題点に着目してなされたものであり、より短い距離で２つのガスの混合が完了するコークス炉燃料ガス混合装置を提供することを目的とするものである。 However, in the coke oven fuel gas mixing apparatus described in Patent Document 1, a distance in the pipeline is required until the coke oven gas and the blast furnace gas are completely mixed, and the two gases are mixed at a shorter distance. A coke oven fuel gas mixing device is desired.
The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a coke oven fuel gas mixing device in which mixing of two gases is completed at a shorter distance.

上記課題を解決するために、本発明のコークス炉燃料ガス混合装置は、所定のガスが流れている流路中に個別のガスを投入して混合するコークス炉燃料ガス混合装置であって、前記流路の壁部に取付けられる枠体と、前記枠体から流路の径方向内側に向けて立設され且つ流路中を流れる所定のガスに渦巻き方向の向きを与える複数枚の羽根とを備えたことを特徴とするものである。
また、所定のガスが流れている流路中に個別のガスを投入して混合するコークス炉燃料ガス混合装置であって、前記流路中を流れる所定のガスの向きと逆向きに個別のガスを流入する流入管と、前記流入管のガス吐出口から所定の間隔をあけて当該ガス吐出口に対向して配設された邪魔板とを備えたことを特徴とするものである。 In order to solve the above-mentioned problems, a coke oven fuel gas mixing device of the present invention is a coke oven fuel gas mixing device that introduces and mixes individual gases into a flow path through which a predetermined gas flows. A frame that is attached to the wall of the flow path, and a plurality of blades that are erected from the frame toward the radially inner side of the flow path and that give a predetermined gas flowing in the flow path in a spiral direction It is characterized by having.
Also, a coke oven fuel gas mixing device for introducing and mixing individual gases into a flow path in which a predetermined gas flows, wherein the individual gas is in a direction opposite to the direction of the predetermined gas flowing in the flow path. And an baffle plate disposed opposite to the gas discharge port at a predetermined interval from the gas discharge port of the inflow tube.

而して、本発明のコークス炉燃料ガス混合装置によれば、流路の壁部に取付けられる枠体と、枠体から流路の径方向内側に向けて立設され且つ流路中を流れる所定のガスに渦巻き方向の向きを与える複数枚の羽根とを備えたことにより、流路中を流れるガスに渦が生じ、この渦によって投入されるガスと流路中を流れるガスがより短い距離で混合される。
また、流路中を流れる所定のガスの向きと逆向きに個別のガスを流入する流入管と、流入管のガス吐出口から所定の間隔をあけて当該ガス吐出口に対向して配設された邪魔板とを備えたことにより、流入管から邪魔板にぶつかった個別のガスは、流路の径方向外側に拡散するため、流路中を流れている所定のガスとの間に乱流が生じ、この乱流によって投入されるガスと流路中を流れるガスがより短い距離で混合される。 Thus, according to the coke oven fuel gas mixing device of the present invention, the frame body attached to the wall portion of the flow path, and standing from the frame body toward the radially inner side of the flow path and flowing in the flow path By providing a plurality of blades that give the swirl direction to a predetermined gas, a vortex is generated in the gas flowing in the flow path, and the gas introduced by the vortex and the gas flowing in the flow path have a shorter distance Mixed in.
In addition, an inflow pipe into which an individual gas flows in a direction opposite to the direction of the predetermined gas flowing in the flow path, and a predetermined interval from the gas discharge port of the inflow pipe are arranged facing the gas discharge port. Since the individual gas that collides with the baffle plate from the inflow pipe diffuses to the outside in the radial direction of the flow path, the turbulent flow between the predetermined gas flowing in the flow path The gas introduced by the turbulent flow and the gas flowing in the flow path are mixed at a shorter distance.

本発明のコークス炉燃料ガス混合装置を適用したコークス炉の一実施形態を示す全体図である。1 is an overall view showing an embodiment of a coke oven to which a coke oven fuel gas mixing device of the present invention is applied. 本発明のコークス炉燃料ガス混合装置の第１実施形態を用いた流路の説明図である。It is explanatory drawing of the flow path using 1st Embodiment of the coke oven fuel gas mixing apparatus of this invention. 図２のコークス炉燃料ガス混合装置の斜視図である。It is a perspective view of the coke oven fuel gas mixing apparatus of FIG. 本発明のコークス炉燃料ガス混合装置の第２実施形態を用いた流路の説明図である。It is explanatory drawing of the flow path using 2nd Embodiment of the coke oven fuel gas mixing apparatus of this invention. 図４のコークス炉燃料ガス混合装置の斜視図である。It is a perspective view of the coke oven fuel gas mixing apparatus of FIG.

次に、本発明のコークス炉燃料ガス混合装置の一実施形態について図面を参照しながら説明する。
図１は、本実施形態のコークス炉燃料ガス混合装置が適用されたコークス炉である。図中の符号１は炭化室であり、炭化室１の紙面垂直方向両隣には、図示しない燃焼室が設けられている。この燃焼室内で燃料ガスを燃焼させることにより、炭化室１内の石炭を乾留してコークスとする。また、図中の符号２は、炭化室１内のコークスを押出す押出機、符号３は、押出されたコークスをガイドするガイド車、符号４は、ガイド車３でガイドされたコークスを受け取る消火車である。 Next, an embodiment of a coke oven fuel gas mixing apparatus of the present invention will be described with reference to the drawings.
FIG. 1 shows a coke oven to which the coke oven fuel gas mixing device of the present embodiment is applied. Reference numeral 1 in the figure denotes a carbonization chamber, and a combustion chamber (not shown) is provided on both sides of the carbonization chamber 1 in the direction perpendicular to the paper surface. By burning fuel gas in this combustion chamber, the coal in the carbonization chamber 1 is dry-distilled into coke. Reference numeral 2 in the figure denotes an extruder that extrudes coke in the carbonization chamber 1, reference numeral 3 denotes a guide wheel that guides the extruded coke, and reference numeral 4 denotes a fire extinguisher that receives coke guided by the guide wheel 3. It is a car.

前記炭化室１や燃焼室の下方には、炉底５が形成されている。本実施形態では、炉底５の両側に煙道６が形成されており、炉底５の内部には、コークス炉の燃料ガスとしてのコークス炉ガス配管７や、高炉から供給される高炉ガス配管８が設置されている。コークス炉ガスは、燃焼室内の燃料ガスとして用いられるが、発熱量が大きすぎるため、高炉ガスを混合して発熱量を制御するのである。
これらのガス配管７、８の保守点検などのため、炉底５には、人が出入りせざるを得ない。そこで、炉外に設けられた換気ブロワー９で炉外の空気を加圧し、それを炉底５内に配設された換気配管１０内に送給し、換気配管１０に設けられた開口部から換気用空気として炉底内に吹き出す。 A furnace bottom 5 is formed below the carbonization chamber 1 and the combustion chamber. In this embodiment, the flue 6 is formed on both sides of the furnace bottom 5, and the coke oven gas pipe 7 as a fuel gas of the coke oven and the blast furnace gas pipe supplied from the blast furnace are formed inside the furnace bottom 5. 8 is installed. Coke oven gas is used as fuel gas in the combustion chamber. However, since the calorific value is too large, the blast furnace gas is mixed to control the calorific value.
For maintenance and inspection of these gas pipes 7, 8, a person must go in and out of the furnace bottom 5. Therefore, the air outside the furnace is pressurized by the ventilation blower 9 provided outside the furnace, and is supplied into the ventilation pipe 10 provided in the furnace bottom 5, from the opening provided in the ventilation pipe 10. Blow out into the furnace bottom as ventilation air.

図２には、前述した高炉ガスとコークス炉ガスを混合する流路２０を示す。例えば、この流路２０では、図の右から左に高炉ガスが流れており、この流路２０中を流れる高炉ガスにコークス炉ガスを投入して両者を混合し、この混合ガスを燃焼室の燃料ガスとして供給する。流路２０の断面は円形である。図中の符号１１は、前記流路２０中にコークス炉ガスを投入するための供給管であり、前記特許文献１に記載されるように、コークス炉ガスを流路２０の中央部と壁部に分散して供給する。このように供給することで、高炉ガスとコークス炉ガスが混合しやすくなる。   In FIG. 2, the flow path 20 which mixes blast furnace gas and coke oven gas which were mentioned above is shown. For example, in this flow path 20, blast furnace gas flows from the right to the left in the figure, and the coke oven gas is introduced into the blast furnace gas flowing in the flow path 20 to mix them, and this mixed gas is mixed with the combustion chamber. Supply as fuel gas. The cross section of the channel 20 is circular. Reference numeral 11 in the figure is a supply pipe for introducing coke oven gas into the flow path 20. As described in Patent Document 1, the coke oven gas is supplied to the central portion and the wall portion of the flow path 20. Distributed and supplied. By supplying in this way, it becomes easy to mix blast furnace gas and coke oven gas.

また、図２中の符号１２は、流路２０を流れる高炉ガスと、当該流路２０に投入されたコークス炉ガスを強制的に混合するための混合器である。図３には、この混合器１２の詳細を示す。この混合器１２は、断面円形の流路２０の壁部に緊密に嵌合して取付けられる円筒状の枠体１３と、この枠体１３から径方向内側に向けて等間隔に立設された４枚の羽根１４からなる。羽根１４は全て同じ形状であり、枠体１３への取付端部から先端部まで幅が均一である。また、断面は、中央がやや膨らんだ形状になっている。   Further, reference numeral 12 in FIG. 2 is a mixer for forcibly mixing the blast furnace gas flowing through the flow path 20 and the coke oven gas charged into the flow path 20. FIG. 3 shows details of the mixer 12. The mixer 12 is installed in a cylindrical frame 13 that is tightly fitted to and attached to the wall of the flow path 20 having a circular cross section, and is erected at regular intervals from the frame 13 inward in the radial direction. It consists of four blades 14. All of the blades 14 have the same shape, and the width is uniform from the end of attachment to the frame 13 to the tip. Moreover, the cross section has a shape in which the center is slightly swollen.

そして、これらの羽根１４の幅方向を、流路２０の長手方向に対して、同じ方向に所定角度だけ捻って取付けてある。このため、この混合器１２内をガスが通過すると、通過するガスが斜めに捻られ、ガス全体に渦が発生する。渦は、流体に対して撹拌・混合作用を有するので、混合器１２を通過した高炉ガスとコークス炉ガスは激しく撹拌され、混合する。その結果、短い距離で混合が完了する。   And the width direction of these blade | wings 14 is twisted only the predetermined angle in the same direction with respect to the longitudinal direction of the flow path 20, and is attached. For this reason, when the gas passes through the mixer 12, the passing gas is twisted obliquely, and a vortex is generated in the entire gas. Since the vortex has a stirring and mixing action on the fluid, the blast furnace gas and the coke oven gas that have passed through the mixer 12 are vigorously stirred and mixed. As a result, mixing is completed in a short distance.

図４には、本発明のコークス炉ガス混合装置の第２実施形態を示す。図中の符号１２は、前記図２と同じ混合器である。本実施形態では、この混合器１２の上流に設けられたコークス炉ガスの投入器１５が異なる。この投入器１５は、自体が高炉ガスとコークス炉ガスの混合装置を兼ねている。図５に詳細を示す。この投入器１５は、流路２０中を流れる高炉ガスの向きと逆向きにコークス炉ガスを流路２０のほぼ中央部に流入する流入管１６と、流入管１６のガス吐出口から所定の間隔をあけて当該ガス吐出口に対向して配設された邪魔板１７と、流入管１６と邪魔板１７とを接続する接続プレート１８とからなる。   In FIG. 4, 2nd Embodiment of the coke oven gas mixing apparatus of this invention is shown. Reference numeral 12 in the figure is the same mixer as in FIG. In the present embodiment, a coke oven gas charging device 15 provided upstream of the mixer 12 is different. The feeder 15 itself also serves as a mixing device for blast furnace gas and coke oven gas. Details are shown in FIG. The charging device 15 includes an inflow pipe 16 that flows coke oven gas into the substantially central portion of the flow path 20 in a direction opposite to the direction of the blast furnace gas flowing in the flow path 20, and a predetermined interval from the gas discharge port of the inflow pipe 16. And a baffle plate 17 disposed opposite to the gas discharge port and a connection plate 18 connecting the inflow pipe 16 and the baffle plate 17.

この投入器１５では、流入管１６のガス吐出口から吐出されるコークス炉ガスは邪魔板１７にぶつかり、邪魔板１７にぶつかったコークス炉ガスは、流路２０の径方向に拡散する。流路２０中には高炉ガスが流れているので、流路２０の径方向に拡散しようとするコークス炉ガスとの間に乱流が生じる。乱流は、比較的狭い範囲ではあっても、流体に対して撹拌・混合作用を有するので、投入器１５から投入されたコークス炉ガスは高炉ガスと激しく撹拌され、混合する。その結果、短い距離で混合が完了する。   In the charging device 15, the coke oven gas discharged from the gas outlet of the inflow pipe 16 hits the baffle plate 17, and the coke oven gas hitting the baffle plate 17 diffuses in the radial direction of the flow path 20. Since the blast furnace gas flows in the flow path 20, a turbulent flow is generated between the blast furnace gas and the coke oven gas that is about to diffuse in the radial direction of the flow path 20. Even though the turbulent flow has a relatively narrow range, it has a stirring / mixing action on the fluid, so the coke oven gas charged from the charging device 15 is vigorously stirred and mixed with the blast furnace gas. As a result, mixing is completed in a short distance.

なお、前記各実施形態では、何れも混合器１２をコークス炉ガス投入位置より高炉ガス流方向下流側に配設したが、混合器１２の位置は、コークス炉ガス投入位置の近傍であれば、高炉ガス流方向の上流側でも下流側でも構わない。特に、第２実施形態の投入器１５との組合せでは、両者が高炉ガス流の上下に接近して配設されていれば、短い距離での燃料ガスの混合が可能となる。   In each of the above embodiments, the mixer 12 is disposed downstream of the coke oven gas charging position in the blast furnace gas flow direction. However, if the mixer 12 is located in the vicinity of the coke oven gas charging position, It may be upstream or downstream in the blast furnace gas flow direction. In particular, in the combination with the charging device 15 of the second embodiment, the fuel gas can be mixed at a short distance if both are arranged close to the top and bottom of the blast furnace gas flow.

１は炭化室、２は押出機、３はガイド車、４は消火車、５は炉底、６は煙道、７はコークス炉ガス配管、８は高炉ガス配管、１０は換気配管、１１は供給管、１２は混合器、１３は枠体、１４は羽根、１５は投入器、１６は流入管、１７は邪魔板、１８は接続プレート、２０は流路   1 is a carbonization chamber, 2 is an extruder, 3 is a guide car, 4 is a fire extinguisher, 5 is a furnace bottom, 6 is a flue, 7 is a coke oven gas pipe, 8 is a blast furnace gas pipe, 10 is a ventilation pipe, 11 is Supply pipe, 12 is a mixer, 13 is a frame, 14 is a blade, 15 is a feeder, 16 is an inflow pipe, 17 is a baffle plate, 18 is a connection plate, and 20 is a flow path.

Claims (3)

所定のガスが流れている流路中に個別のガスを投入して混合するコークス炉燃料ガス混合装置であって、前記流路の壁部に取付けられる枠体と、前記枠体から流路の径方向内側に向けて立設され且つ流路中を流れる所定のガスに渦巻き方向の向きを与える複数枚の羽根とを備えたことを特徴とするコークス炉燃料ガス混合装置。   A coke oven fuel gas mixing device for introducing and mixing individual gases into a flow path in which a predetermined gas flows, a frame body attached to a wall portion of the flow path, and a flow path from the frame body to the flow path A coke oven fuel gas mixing apparatus, comprising: a plurality of blades standing inward in a radial direction and imparting a spiral direction to a predetermined gas flowing in a flow path. 所定のガスが流れている流路中に個別のガスを投入して混合するコークス炉燃料ガス混合装置であって、前記流路中を流れる所定のガスの向きと逆向きに個別のガスを流入する流入管と、前記流入管のガス吐出口から所定の間隔をあけて当該ガス吐出口に対向して配設された邪魔板とを備えたことを特徴とするコークス炉燃料ガス混合装置。   A coke oven fuel gas mixing device for introducing and mixing individual gases into a flow path in which a predetermined gas flows, and flowing the individual gas in a direction opposite to the direction of the predetermined gas flowing in the flow path A coke oven fuel gas mixing apparatus, comprising: an inflow pipe that is disposed; and a baffle plate disposed at a predetermined interval from the gas discharge port of the inflow pipe so as to face the gas discharge port. 前記請求項１のコークス炉燃料ガス混合装置と前記請求項２のコークス炉燃料ガス混合装置を、前記流路内に接近して、前記所定のガスの流れ方向の前後に配設したことを特徴とするコークス炉燃料ガス混合装置。   The coke oven fuel gas mixing device according to claim 1 and the coke oven fuel gas mixing device according to claim 2 are arranged close to the flow path and before and after the predetermined gas flow direction. Coke oven fuel gas mixing device.
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CN107216887A (en) * 2017-06-26 2017-09-29 中冶华天工程技术有限公司 Raw coke over gas riser heat exchanger
JP2020020011A (en) * 2018-08-02 2020-02-06 Ｊｆｅスチール株式会社 Pig-iron manufacturing facility and method for manufacturing pig-iron using the same

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CN106051294B (en) * 2016-05-23 2018-09-07 内蒙古包钢钢联股份有限公司 The method that large capacity coke oven replaces the sealing of blast furnace gas pipeline platform trap door axle head online

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JP2003254090A (en) * 2002-02-26 2003-09-10 Jfe Steel Kk Apparatus and method for mixing blast furnace gas with added gas
JP2006326571A (en) * 2005-04-28 2006-12-07 Hitachi Ltd Fluid mixing device
JP2007008979A (en) * 2005-06-28 2007-01-18 Jfe Steel Kk Method for feeding fuel gas into coke oven and mixer for fuel gas

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JPS537243Y2 (en) * 1974-08-02 1978-02-23
JP2003117367A (en) * 2001-10-18 2003-04-22 Mitsubishi Heavy Ind Ltd Gas mixer
JP2003254090A (en) * 2002-02-26 2003-09-10 Jfe Steel Kk Apparatus and method for mixing blast furnace gas with added gas
JP2006326571A (en) * 2005-04-28 2006-12-07 Hitachi Ltd Fluid mixing device
JP2007008979A (en) * 2005-06-28 2007-01-18 Jfe Steel Kk Method for feeding fuel gas into coke oven and mixer for fuel gas

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107216887A (en) * 2017-06-26 2017-09-29 中冶华天工程技术有限公司 Raw coke over gas riser heat exchanger
JP2020020011A (en) * 2018-08-02 2020-02-06 Ｊｆｅスチール株式会社 Pig-iron manufacturing facility and method for manufacturing pig-iron using the same

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