JP3612911B2 - Method and apparatus for removing carbon around coke oven charging inlet - Google Patents

Description

【００６７】
そして、１番ホールから一番離れた位置の炉蓋位置での窯口部温度を放射温度計にて測定してみたところ、下記表２に示す結果を得た。
【００６８】
【表２】

【００６９】
この表２から分かるように、実際よりも長く３０分程度も空気の投入を連続しても空窯前後の温度変化は−６℃〜１００℃の範囲となっている。ここで、空気投入を行わないで３０分程度放置した空窯では１２０℃程度の温度低下が見られることから、温度変化が小さいこと分かる。
【００７０】
また、上昇管からガスをサンプリングしてガス分析を行ってみたところ、下記表３のような結果を得た。
【００７１】
【表３】

【００７２】
この表３から分かるように、本発明に基づく付着カーボン除去作業時には、
Ｏ_２ 濃度の低下、ＣＯ_２ 濃度の上昇により、カーボン除去が行われていることは明らかである。
【００７３】
また、空気投入口下部のレンガ及び目地の損傷について目視確認を行ったが、レンガ損傷等は確認されなかった。
ちなみに、カーボンの燃焼量について考察すると、コンプレッサによる流量を０．７８Ｎｍ^３ ／分とし３２分供給したとすると、
供給酸素量は、次のようになる。
【００７４】
０．７８×３２×（２０〜３０）×（０．２１−０．０７）
＝６５〜９８Ｎｍ^３
また、燃焼カーボン量は、
（６５〜９８）÷２２．４（ｍ^３ ／ｋｍｏｌ） ×１２（ｋｇ／ｋｍｏｌ ）
＝３５〜５２ｋｇとなる。
【００７５】
【発明の効果】
以上説明してきたように、本発明を採用すると、簡単な手段で炉を損傷することなく、しかも、短時間でコークス炉装入口周りの付着カーボンの除去ができるという効果がある。
【００７６】
また、石炭装入のための、所謂ブロック操業を維持しつつ装入口周りの付着カーボンの除去作業が実施できる。即ち、装入口周りの付着カーボンの除去のために別途時間を確保する必要がないという効果がある。
【００７７】
さらに、空気投入の装置が小型軽量化することが可能となるという効果がある。
【００７８】
また、請求項２に記載の発明を採用すると、装入口周りの付着カーボンの除去作業の自動化が図られる。
また、請求項３に記載の発明を採用すると、石炭装入位置に既存の装炭車を移動させると、自動的に、蓋取装置及び空気投入器がカーボン除去用の炭化室の上に位置するため制御が容易となるという効果がある。
【図面の簡単な説明】
【図１】本発明の実施の形態に係るコークス炉及び装炭車等を示す図である。
【図２】本発明の実施の形態に係る炭化室を示す図である。
【図３】本発明の実施の形態に係る蓋取装置及び空気投入器を示す図である。
【図４】本発明の実施の形態に係る空気投入器による空気の強制供給を示す図である。
【図５】従来の装入口５の微開による温度変化を示す図である。
【符号の説明】
１ 炭化室
３ コークス炉
５ 装入口
６ 装炭車
８ 装入蓋
２０ 蓋取装置
２１ 空気投入器
２３ 延設フレーム部
２４ 昇降ガイドレール
２６ 昇降部
２７ シリンダ装置
２８ 旋回台
２９ リフマグ
３０ モータ
３１ 昇降ガイドレール
３２ 昇降部
３３ シリンダ装置
３９ コンプレッサ
４０ 空気投入器本体[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a carbon removing method around a coke oven charging inlet and a carbon removing apparatus for removing carbon adhering around a charging inlet for charging coal in a coking chamber of a coke oven.
[0002]
[Prior art]
In a coke oven, coal is charged into a carbonization chamber from a charging inlet, and a charging coal layer is formed in the carbonizing chamber, and the charging coal layer is subjected to dry distillation over 10 hours by indirect heating. During this carbonization, gas is generated in the carbonization chamber, and this gas passes through the space above the charging coal bed and is collected in the air collecting pipe through the riser pipe.
[0003]
At this time, carbon is generated in the carbonization chamber due to the thermal decomposition of raw gas generated during the dry distillation of coal, and this carbon adheres to the carbonization chamber furnace wall, in particular, adheres to the furnace ceiling side above the charged coal layer. To do. The amount of carbon attached is said to be 600 μm in one dry distillation, and the attached carbon grows every time dry distillation is repeated.
[0004]
The adhering carbon as described above causes problems such as deterioration of heat transfer, reduction of charging coal amount, increase of coke extrusion resistance, etc., leading to troubles in coke oven operation. For this reason, it is necessary to remove the carbon adhering to the carbonization chamber furnace wall by the dry distillation.
[0005]
As a conventional method for removing the adhered carbon, for example, there is a method as disclosed in JP-A-61-231088. In this method, after the coke is extruded from the carbonization chamber, the furnace lids on the extruder side and the guide wheel side are not attached, that is, the both ends of the carbonization chamber are left open to the atmosphere for several hours, It is removed by carbon combustion due to contact and peeling off of the adhered carbon layer due to temperature drop in the furnace.
[0006]
Further, as described above, the amount of carbon adhering is the largest on the ceiling portion side of the carbonization chamber, and the charging port is a portion where it is difficult to remove adhering carbon because it is constructed with a complicated surface. Therefore, in order to remove the carbon adhering to the ceiling wall having the largest carbon adhesion amount in the carbonization chamber, particularly the adhering carbon around the inlet, the following carbon removal method has been proposed.
[0007]
That is, about 90 minutes before coke extrusion by tilting the charging lid that closes the charging port with respect to the carbonization chamber in which the carbonization in the carbonization chamber is completed and the coke is discharged. In addition, the charging port is slightly opened, and the top of the rising pipe is opened to open the upper end of the rising pipe.
[0008]
As a result, air is sucked into the carbonization chamber by natural ventilation from the micro-opening inlet, and the carbon adhering to the ceiling portion of the carbonization chamber is combusted along the route to the riser pipe, and the burned gas is removed from the riser pipe. The carbon is removed by being diffused into the atmosphere from the upper end.
[0009]
[Problems to be solved by the invention]
However, in the removal method in which the furnace lid is left open, both ends of the furnace are opened for a long time, and in addition to the large heat loss of the furnace, the bricks in the furnace are cut off due to a sudden drop in the furnace temperature. Production loss is inevitable because the carbonization chamber must be emptied for a long time.
[0010]
In particular, the vicinity of the inlet with a large amount of carbon adhesion is not suitable for removal of the amount of carbon adhesion around the inlet because it is away from the atmosphere opening position (furnace lid position).
In addition, in the removal method by natural ventilation with the charging opening slightly opened, since the flammable generated gas from the coal layer is accumulated in the upper part of the carbonization chamber before coke extrusion, it has priority over the attached carbon, The generated gas and coke are burned.
[0011]
As a result, not only a long time of about 90 minutes is required for carbon removal as described above, but as shown by A in FIG. 5, the temperature in the furnace rapidly increases when this removal method is performed. And it descends rapidly with the end of work. This causes problems such as damage to the furnace body itself, distortion of the furnace lid due to repeated rapid heating / cooling, damage to the seal plate, and the like.
[0012]
Furthermore, unnecessary combustion of the generated gas causes problems such as an increase in tar QI, which causes a gas recovery loss due to an undesirable change in the generated gas component to be recovered, and a new carbon adhesion due to a sudden rise in the furnace gas temperature. is there.
[0013]
This causes deterioration of the coke oven environment and shortening of the furnace life.
The present invention has been made paying attention to such problems, and a carbon removal method and carbon removal around a coke oven charging inlet that can remove adhering carbon around the charging inlet in a short period of time while suppressing damage to the furnace. An object is to provide an apparatus.
[0014]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the carbon removal method around the coke oven charging inlet according to claim 1 of the present invention,In the so-called block operation, the coal charging into the plural coking chambers arranged in parallel is performed in order at a predetermined gate position, and the extrusion of the carbonized coke is sequentially performed in the predetermined gate position according to the order of the coal charging. When performing the coal charging and coke extrusion work, after the coke extrusion is completed for a predetermined time until the coal charging work to the carbonization chamber of the current coal charge is completed for the carbonization chamber after the coke extrusion is completed. Open the inlet of the carbonization chamber, and use the ejector effect of the compressed air ejected toward the opened inlet to bring an air inlet forcibly blowing air close to the inlet. To supply air to burn the carbon around the inletIt is characterized by that.
[0015]
According to the present invention, air is forcibly supplied from the inlet to the carbonization chamber which has become an empty kiln by extruding coke, that is, air is forcibly supplied from the inlet with a small amount of combustion gas. Thus, the air is mainly used for burning adhering carbon around the inlet.
[0016]
As a result, the adhering carbon is burned and removed in a short period of time, and the temperature drop in the carbonization chamber due to the forced supply of air is balanced with the temperature increase in the carbonization chamber due to the combustion of the adhering carbon. The occurrence of temperature fluctuations is avoided.
[0018]
In general, coal is charged at predetermined gates by a so-called block operation, for example, in order at a charging interval of about 10 minutes, and in a carbonization chamber separated from the predetermined gate during coal charging in synchronism with the charging. Coke is extruded from.
[0019]
According to the present invention, since the carbon removal operation can be performed in a short period of time (for example, in about 5 minutes) as described above, the carbon removal operation is completed until the current coal charging operation into the current carbonization chamber is completed. Can work.
[0020]
Therefore, the carbon deposition around the charging port is removed without significantly reducing the charging interval of the coal, that is, while maintaining the block operation and suppressing the production loss.
[0022]
According to the present invention, by using an air input device that utilizes the ejector effect, a large amount of air can be forcibly supplied even if the compressor for pumping air is small, and the air supply device can be reduced in size and weight. Figured.
[0023]
For example, an air amount 10 to several tens of times the amount of air pumped from the compressor can be forcibly blown from the inlet.
Next, the claim2The carbon removing apparatus described in 1 is a moving body that can move in the direction in which the carbonizing chambers are arranged on the coke oven, and a charging lid that closes the inlet of the carbonizing chamber that is supported by the moving body and is in an empty kiln state. A lid removing device for removing and attaching, and moving up and down toward the loading port supported by the moving body and toward the loading portAir is forcibly blown out using the ejector effect of the compressed airIt consists of an air thrower.
[0024]
According to the present invention, the moving body is moved to the target carbonization chamber in an empty kiln state, the charging lid is temporarily removed by an electromagnet-type lid removing device, and the air is directed toward the opened inlet. The input device is lowered and air is forcibly supplied from the inlet by the air input device.
[0025]
Thus, by adopting the present invention, the carbon removal work can be automated.
Next, the claim3The invention described in claim2In contrast to the configuration described in (1), the moving body is a charcoal vehicle that runs on a coke oven.
[0026]
According to the present invention, when the moving body is a charcoal vehicle, the carbon removal vehicle is automatically moved to the position of the carbonization chamber in which the coal is charged, so that the carbon removing lid removing device and the air input device are automatically provided. Is moved to the vicinity of the carbonization chamber where the current coke extrusion or the extrusion has been completed, that is, the carbonization chamber to be subjected to carbon removal.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
First, the configuration will be described.
[0028]
The coke oven 3 of the present embodiment has a structure similar to that of the conventional one, and as shown in FIG. 1, the carbonization chamber 1 and the combustion chamber 2 are alternately arranged in a predetermined direction through furnace wall bricks 4, For example, 86 or more gates are arranged, and a plurality of inlets 5 (described as four in the following description) are provided in the longitudinal direction of the ceiling wall constituting each carbonization chamber 1 as shown in FIG. It is arranged.
[0029]
On the furnace of the coke oven 3, a charcoal vehicle 6 that can travel in the direction in which the carbonizing chambers 1 are arranged is disposed. In FIG. 1, 6a is the wheel.
The charcoal vehicle 6 is equipped with four charcoal hoppers 7 (only one is shown in FIG. 1), and the loading lids 8a attached to the respective charging ports 5 are removed. Four lids 9 for charging coal are provided. Each charging coal cover machine 9 is configured with a lifting magnet 9a (hereinafter referred to as a "lifting magnet") as a main body, and is fixed to the target iron charging lid 8a by magnetic force so that the charging lid 8a is attached. It can be lifted.
[0030]
And this coal loading vehicle 6 moves to the position of the carbonization chamber 1a which charges coal sequentially, and performs the charging operation of coal.
That is, first, the lid remover 9 is operated to magnetically attach the riff mug 9a to the charging lid 8a, and the charging lid 8a is removed from the charging port 5. Subsequently, the coal stored in each coal hopper 7 is cut out by the coal feeder 10 and charged into the carbonization chamber 1 a through the charging port 5.
[0031]
Further, after the coal charged in the carbonization chamber 1a is leveled by a leveler (not shown) to form a charged coal layer 11, the lid remover 9 is actuated again by the riff mug 9a. The charging inlet 5 is covered with a charging lid 8a and closed.
[0032]
Here, the charging coal layer 11 formed in the carbonization chamber 1 is indirectly heated by the heat transfer of the furnace wall brick 4 due to the temperature rise in the combustion chamber 2 disposed on both sides of the carbonization chamber 1. Distilled over several hours.
[0033]
The gas generated in the carbonization chamber 1 during the carbonization period passes through the upper space of the charging coal layer 11, is collected in the gas collection tube 13 through the riser 12, and is finally stored in the gas holder. .
[0034]
Further, in the carbonization chamber 1, carbon is generated by the thermal decomposition of raw gas generated during the coal carbonization, and this carbon adheres to the furnace wall of the carbonization chamber 1. The amount of gas generated during dry distillation is large at the beginning of dry distillation, gradually decreases with the progress of dry distillation, and becomes extremely small at the end of dry distillation. For this reason, the carbon adhering to the furnace wall of the carbonization chamber 1 increases in particular at the beginning of dry distillation.
[0035]
After the coal carbonization in the carbonization chamber 1 is finished, after removing the furnace lids (not shown) attached to both sides of the carbonization chamber 1, the high-temperature coke is pushed horizontally to the coke discharge side by an extruder, and the extruded coke is It is received by the fire extinguisher via the coke guide car, and the coke is extinguished.
[0036]
Coke is manufactured by sequentially repeating the above operation for each carbonization chamber 1 of the coke oven 3.
Here, coal charging into the carbonization chamber 1 reaching several dozen to hundred gates disposed in the coke oven 3 is performed in order, for example, every five gates in consideration of dry distillation efficiency and workability. The coke thus discharged is discharged from the carbonization chamber 1 every five gates according to the order of coal charging. For this reason, when charging to the carbonization chamber 1a in which coal is charged is completed, coke is discharged from the carbonization chamber 1 next to the fourth gate counting from the carbonization chamber 1 adjacent to the carbonization chamber 1. . The number of carbonization chambers 1 installed in the coke oven 3 is one furnace group, for example, 39 gates. In the coke oven 3 composed of two furnace groups, the number reaches 78 gates. Furthermore, since there are four inlets 5 in each chamber, there are as many as 312 inlets 5.
[0037]
Then, the coal charged in each carbonization chamber 1 is coke that is produced by dry distillation over a dozen times, and is discharged from each carbonization chamber 1 at intervals of about 10 minutes according to the order of coal charging. Therefore, the charging of coke into each carbonization chamber 1 is performed in order at intervals of about 10 minutes, and the discharge of coke from each carbonization chamber 1 in accordance with the timing of charging the coal into the carbonization chamber 1. Is done. In such a so-called block operation, the relationship between the carbonization chamber 1 in which the current coal is charged and the carbonization chamber 1 in which the coke is discharged is basically always separated by a predetermined interval, for example, the carbonization chamber 1 for four gates. It has become.
[0038]
In the present embodiment, when coke is produced in the coke oven 3, the carbon attached to the furnace wall of the carbonization chamber 1 is mechanically removed. The cover removing device for removal and the air input devices 21 are attached in groups of four.
[0039]
The four capping devices 20 and the air input device 21 are separated by four gates when counted from the adjacent charging port 5 when the coal-coating vehicle 6 is stopped in accordance with the position of the carbonizing chamber 1a in the order of coal charging. Further, each of the extension frame portions 23 extending in the alignment direction of the carbonization chambers 1 in the gantry frame 6b of the charcoal vehicle 6 so as to correspond to the positions of the carbonization chambers 1b in the order in which coke is discharged next. The lid removing device 20 and the air input device 21 are supported (see FIG. 1).
[0040]
The configuration of the carbon removing lid removing device 20 will be described. As shown in FIG. 3, an elevating part 26 is attached to an elevating guide rail 24 extending downward from the extended frame part 23 via a roller 25. The elevating part 26 can be moved up and down by being guided by the elevating guide rail 24. In addition, a cylinder of an elevating (hydraulic) cylinder device 27 is attached to the upper part of the elevating guide rail 24. The cylinder device 27 is arranged with its axis up and down, and projects the piston rod 27a downward and connects the tip of the piston rod 27a to the lift 26. As a result, the lift unit 26 can be moved up and down by operating the cylinder device 27.
[0041]
The elevating part 26 supports a swivel 28 made of an L-shaped frame. That is, the vertical portion 28a of the swivel base 28 is pivotally supported with respect to the lift unit 26 so as to be pivotable about the vertical axis, and the swivel base 28 is swung in the left-right direction by the turning motor 30 supported by the lift unit 26. It is possible. The horizontal portion 28b of the swivel base 28 is in a state of projecting laterally from the elevating portion 26, and protrudes downward from the lower surface of the horizontal portion 28b to support the riff mug 29 for loading lid magnetization. Yes. The driving means for turning the swivel base 28 is not limited to the turning motor 30 and may be constituted by a known rotary cylinder device 27 or the like.
[0042]
Further, as shown in FIG. 3, the air thrower 21 and its support structure are provided with an elevating part 32 attached to an elevating guide rail 31 extending downward from the extended frame part 23 in parallel with the guide rail 24, The elevating part 32 can be moved up and down by being guided by the elevating guide rail 31. A cylinder of a lifting / lowering (hydraulic) cylinder device 33 is attached to the upper part of the lifting / lowering guide rail 31. The cylinder device 27 is arranged with its axis facing up and down, projects the piston rod 33a downward, and connects the tip of the piston rod 33a to the lift unit 32. As a result, the lift unit 32 can be moved up and down by operating the cylinder device 33.
[0043]
An air injector main body 40 is attached to the elevating part 32. The air thrower body 40 is a known air throwing device that uses the ejector effect. The air thrower body 40 is arranged with its axis facing up and down, and a compressed air supply unit 40a arranged at the upper end and the lower end of the compressed air supply unit 40a. It consists of a cone-shaped air guiding portion 40b that communicates coaxially with the portion and extends downward. The compressed air supply unit 40a is connected to the compressor 39, jets air supplied from the compressor 39 from the circumferential direction, and the surrounding air is sucked by the ejector effect of the jetted compressed air and passes through the air guide unit 40b. A large amount of air is blown out, and 10 to several tens of times the compressed air supplied from the compressor 39 can be blown out.
[0044]
Then, the carbon removing lid removing device 20 and the air charging device 21 having the above-described configuration are supported on the front side of the charcoal vehicle 6 in parallel in the longitudinal direction of the carbonizing chamber 1.
[0045]
Next, the operation of the present invention will be described.
After discharging the carbonized coke, the coal loading vehicle 6 is moved to the position of the carbonization chamber 1a in which the coal charging sequence has been completed, and the charging lid remover 9 disposed in the coal loading vehicle 6 is operated. After removing the charging lid 8 a by 9 a, the coal in the coal charging hopper 7 is cut out using the coal feeder 10 and charged into the carbonizing chamber 1 through the charging port 5.
[0046]
At this time, with respect to the charcoal vehicle 6, the lid removing device 20 and the air input device 21 that are supported at the ends in the traveling direction are from the inlet 5 adjacent to the inlet 5 in the order of coal charging. It is located above the charging port 5 at the top of the carbonizing chamber 1b in the order of discharging the coke, which is the fifth one to be counted.
[0047]
During the coal charging operation, the coke in the carbonization chamber 1b that has been dry-distilled is discharged. When the discharge of the coke is completed and the furnace lid is attached, in this embodiment, the four charging ports 5 provided in the carbonizing chamber 1 where the discharge of the coke is completed are respectively used by using the four lid removing devices 20. The closed charging lid 8b is individually removed, and air is forcibly supplied from the charging inlet 5.
[0048]
That is, after driving the turning motor 30 to turn the turntable 28 and moving the riff mug 9a made of an electromagnet above the loading lid 8, the piston rod 27a of the cylinder device 27 for the lid removing device 20 is moved. And the riff mug 29 is lowered to bring it close to or in contact with the charging lid 8b. At this time, the riff mug 29 is turned on to magnetize the iron charging lid 8b.
[0049]
Further, the piston rod 27a of the cylinder device 27 for the lid removing device is contracted to raise the riff mug 29 to remove the charging lid 8b from the loading port 5, and further, the turning motor 30 is operated to turn the turntable. 28 is turned to retract the loading lid 8b to the side.
[0050]
Subsequently, the piston rod 33a of the cylinder device 33 for the air input device 21 is operated to extend, and as shown in FIG. The compressor 39 is operated to forcibly supply air toward the inlet 5 by the air input device 21.
[0051]
Then, due to the ejector effect, the surrounding air is sucked and 10 to several tens of times the amount of compressed air supplied from the compressor 39 is forcibly sent into the carbonizing chamber 1 through the charging port 5, and around the charging port. The attached carbon around the charging inlet is removed by burning or peeling sequentially from the attached carbon.
[0052]
In this state, there is not much generated gas in the carbonization chamber 1b, and since the inside of the carbonization chamber 1b is at a high temperature, the attached carbon spontaneously combusts only by contact with air.
[0053]
After forcibly supplying the air for about 5 minutes, the compressor 39 is stopped, the piston rod 33a of the cylinder device 33 for the air input device 21 is contracted to raise the air input device main body 40 and retract. .
[0054]
Subsequently, after the swivel motor 30 is operated to swivel the swivel base 28 to move the riff mug 29 horizontally above the loading port 5 as a target, the piston rod 27a of the cylinder device 27 for the capping device 20 is moved. The riffmag 29 is lowered and brought close to the inlet 5, and then the riffmag 29 is turned off so that the magnetically attached iron charging lid 8 b is placed on the inlet 5. Then, the piston rod 27a of the cylinder device 27 for the lid removing device is contracted to retract the riff mug 29 upward.
[0055]
Thereby, the adhered carbon removing operation is completed. This adhering carbon removing operation is completed in a short time of about 5 minutes as described above, so that the adhering carbon removing operation is completed during the current coal charging operation.
[0056]
When the current coal charging operation is completed, the lid cover 9 provided on the coal loading side is operated, and the charging lid 8a is placed on the charging port 5 of the carbonizing chamber 1b charged with the coal by the riff mug 9a.
[0057]
Further, the above operation is performed by moving the coal-coating vehicle 6 to the next coal charging carbonization chamber 1, that is, the carbonization chamber 1 b from which the coke is extruded and the attached carbon is removed.
Thus, in this embodiment, while maintaining the coal charging and coke extrusion operations by the conventional block operation, that is, even if the operation is performed with the coal charging interval set to about 10 minutes as in the conventional case. As part of the block operation, the carbon adhering around the coal loading port where carbon is most likely to adhere can be reliably and easily removed.
[0058]
Here, injecting air for carbon adhesion may lead to a decrease in temperature in the carbonization chamber 1b. However, temperature increase in the carbonization chamber 1 due to temperature increase due to carbon combustion can be suppressed, and carbon adhesion Occurrence of damage to the furnace body for removal work is suppressed.
[0059]
In addition, as described above, since air is forcibly supplied only at a predetermined timing, the apparatus for removing attached carbon also has a simple configuration including only the lid removing device 20 and the air input device 21 as described above. It becomes. In addition, by adopting the air input device 21 utilizing the ejector effect as the air input device 21, even when supplying a large amount of air, the air input device 21 itself can be reduced in size and weight.
[0060]
Moreover, by making the traveling body into the coal loading vehicle 6 for the coal loading, an original traveling vehicle for removing attached carbon becomes unnecessary, and when the coal loading vehicle 6 is moved to the carbonization chamber 1 where the coal is charged, In addition, since the lid removing device 20 and the air input device 21 are installed at the position of the carbonization chamber 1 where the carbon is removed, the control is simplified accordingly.
[0061]
Of course, the lid removal device 20 for removing carbon and the air input device 21 may be supported and moved by a unique traveling vehicle.
As described above, when the carbon removal cover device 20 and the air input device 21 are supported by the charcoal vehicle 6, when the coal is charged into the carbonization chamber 1 located at the end in the traveling direction. The carbon removal work is not performed in synchronization, but this occurs, for example, at a rate of about once every 86 times, and the loss of about 5 minutes that cannot be synchronized is a problem. Don't be.
[0062]
In the above-described embodiment, an example in which the air input device 21 using the ejector effect is used has been described. However, the air from the compressor 39 is directly ejected to the inlet 5 without using the ejector effect. The air input device 21 may be used. However, in this case, the compressor 39 and the like are enlarged.
[0063]
In addition, since the carbon removing operation is performed every time after the coke extrusion as described above, there is an effect even if the carbon is not completely removed each time.
[0064]
【Example】
An experiment was conducted to confirm the effect of removing the carbon.
The air pressure from the compressor is about 1.0 kg / cm², The flow rate is about 1Nm³When air was supplied from the charging inlet at a setting of / min, it was confirmed that carbon around the charging inlet could be completely removed in about 5 to 15 minutes. In particular, it was confirmed that carbon removal at the lower part of the coal charging port where air was introduced was promoted from other positions. In addition, it seemed that the carbon was removed entirely in the entire carbonization chamber.
[0065]
Note that the amount of air actually supplied from the inlet is about 20 to 30 times the above flow rate due to the ejector effect. The same applies to the following description.
Next, the effect was further confirmed under the empty kiln conditions shown in Table 1 below. The empty kiln time is almost the air charging time, and the air charging position is a number from the end of the four inlets.
[0066]
[Table 1]

[0067]
And when the kiln opening part temperature in the furnace cover position of the position furthest from 1st hole was measured with the radiation thermometer, the result shown in following Table 2 was obtained.
[0068]
[Table 2]

[0069]
As can be seen from Table 2, the temperature change before and after the empty kiln is in the range of −6 ° C. to 100 ° C. even if the air is continuously supplied for about 30 minutes longer than actual. Here, in an empty kiln that is left for about 30 minutes without air supply, a temperature drop of about 120 ° C. is seen, so that the temperature change is small.
[0070]
Further, when the gas was analyzed by sampling the gas from the ascending pipe, the results shown in Table 3 below were obtained.
[0071]
[Table 3]

[0072]
As can be seen from Table 3, during the carbon removal work based on the present invention,
O₂Reduced concentration, CO₂It is clear that carbon removal is being performed by increasing the concentration.
[0073]
Moreover, although the visual check was performed about the damage of the brick and joint of the lower part of an air inlet, brick damage etc. were not confirmed.
By the way, considering the amount of carbon combustion, the flow rate by the compressor is 0.78 Nm.³Assuming that it is supplied for 32 minutes per minute,
The amount of oxygen supplied is as follows.
[0074]
0.78 × 32 × (20-30) × (0.21-0.07)
= 65-98Nm³
The amount of carbon burned is
(65-98) /22.4 (m³/ Kmol) x 12 (kg / kmol)
= 35-52 kg.
[0075]
【The invention's effect】
As described above, when the present invention is adopted, there is an effect that carbon adhering around the inlet of the coke oven can be removed in a short time without damaging the furnace by simple means.
[0076]
Also,The operation of removing carbon adhering around the charging inlet can be performed while maintaining the so-called block operation for charging coal. That is, there is an effect that it is not necessary to secure a separate time for removing carbon adhering around the charging port.
[0077]
further,There is an effect that the air-filling device can be reduced in size and weight..
[0078]
Claims2When the invention described in (1) is adopted, the work of removing attached carbon around the inlet is automated.
Claims3When the invention described in the above is adopted, when the existing charcoal vehicle is moved to the coal charging position, the lid removal device and the air input device are automatically positioned on the carbonization chamber for carbon removal, so that the control is easy. There is an effect of becoming.
[Brief description of the drawings]
FIG. 1 is a diagram showing a coke oven, a charcoal vehicle, and the like according to an embodiment of the present invention.
FIG. 2 is a view showing a carbonization chamber according to an embodiment of the present invention.
FIG. 3 is a diagram showing a lid removing device and an air thrower according to an embodiment of the present invention.
FIG. 4 is a diagram showing forced air supply by the air input device according to the embodiment of the present invention.
FIG. 5 is a diagram showing a temperature change caused by slightly opening the conventional inlet 5;
[Explanation of symbols]
1 Carbonization chamber
3 Coke oven
5 Loading port
6 Charcoal car
8 Loading lid
20 Lid removal device
21 Air thrower
23 Extension frame
24 Lifting guide rail
26 Elevator
27 Cylinder device
28 swivel
29 Riff Mug
30 motor
31 Elevating guide rail
32 Lifting part
33 Cylinder device
39 Compressor
40 Air thrower body

Claims (3)

In the so-called block operation, the coal charging to the plural coking chambers arranged in parallel is performed in order in a predetermined gate position, and the extrusion of the dry coke is sequentially performed in the predetermined gate position in accordance with the order of the coal charging. When performing the coal charging and coke extrusion work, after the coke extrusion is completed for a predetermined time until the coal charging work into the carbonization chamber of the current coal charge is completed for the carbonization chamber after the coke extrusion is completed. The carbonization chamber is opened, and an air thrower forcibly blowing out air by using the ejector effect of the compressed air ejected toward the opened charge is brought close to the charging chamber. decoking method for coke RoSo inlet around, characterized in Rukoto burning a carbon spout around by supplying air toward. A movable body movable on the coke oven in the alignment direction of the carbonization chamber, and a lid removing device that removes a charging lid that closes the charging port of the carbonization chamber supported by the movable body and in an empty kiln state; And an air thrower that is supported by the moving body and moves up and down toward the loading port and forcibly blows air by using an ejector effect of compressed air that is blown toward the loading port. Carbon removal device. The carbon removal apparatus according to claim 2 , wherein the moving body is a charcoal vehicle that runs on a coke oven.

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