JP2006036838A - Apparatus for cleaning furnace lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To preferably remove deposits at a gas canal and at the tip parts of knife edges being the most important parts in terms of function of a furnace lid. <P>SOLUTION: The gas canal 7 and the tip parts of the knife edges 4 are cleaned by using high-pressure waterjet force and a heat insulating material 5 is cleaned by using mechanical cutting force at both sides and at the lower side of the furnace lid. On the other hand, since the amount of deposits such as tar, carbon, etc., on the heat insulating material 5 is smaller at the surface of the furnace lid than at both the sides and at the lower side, the gas canal 7 and the tip parts of the knife edges 4 are cleaned by using only high-pressure waterjet force. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a furnace lid cleaning device in a coke oven.

  In a chamber-type coke oven, coal carried by a coal charging vehicle is introduced into the furnace through a coal inlet provided at the top of the furnace, and the coal is carbonized to form coke, which is then formed at both ends of the furnace. An extrusion rod is inserted into the furnace from one of the openings, and coke in the furnace is pushed out from the other opening. During coal carbonization, the opening is closed with a furnace lid, but tar and carbon generated during coal carbonization adhere to the entire furnace lid. This may cause gas leakage and suction of outside air, resulting in environmental pollution and ashing of coke produced.

  Tar and carbon adhering to the furnace lid are removed by a furnace lid cleaning device (commonly called “door cleaner”). With reference to FIG. 12, the parts that need to be removed are the entire peripheral portion of the steel plate 3 that is attached to the front surface of the furnace lid body (door frame) 2 of the furnace lid 1 and defines the gas passage 7, and the outside of the steel plate 3. The front end portion of the knife edge 4 attached to the periphery (the contact portion with the furnace frame 6 constituting the opening of the furnace), both side surfaces and the bottom surface of the substantially square pillar-shaped heat insulating material 5 attached to the front surface of the steel plate 3 As for the conventional furnace cover cleaning device, a scraper method is generally used for the entire peripheral portion of the steel plate 3 and a rotary cutter method is generally used for the heat insulating material 5. However, the tar and carbon adhering to the tip portion of the knife edge 4 are not removed.

By the way, in the said conventional furnace cover cleaning apparatus, there exist the following problems.
(1) The steel plate 3 is extremely thin, and the steel plate 3 is easily damaged in the scraper method in which the steel plate 3 is in mechanical contact.
(2) The centering of the furnace cover 1 and the furnace cover cleaning device has no allowance in both the front-rear and left-right directions, so that the scraper is less likely to adhere to the deposit cleaning surface of the steel plate 3.
(3) The steel plate 3 has upper, lower, left and right corner portions, and in the scraper method, the clogged deposits occur at the corner portions.
(4) When the deposit is tar, it is soft, and the tar may not be removed well just by passing through the scraper.
(5) The tip portion of the knife edge 4 is the most important part for gas sealing of the opening, and a scraper method that may damage the knife edge 4 cannot be adopted.

  It is a serious defect that the deposit removal of the gas passage 7 and the tip portion of the knife edge 4 which are the most important points in the function of the furnace lid 1 cannot be suitably performed. That is, the conventional furnace cover cleaning device does not sufficiently remove the furnace cover deposits, and it is difficult to say that it fulfills the purpose of preventing environmental problems and ashing of the produced coke. The present invention solves the disadvantages of these conventional furnace lid cleaning devices and achieves the original purpose of removing the furnace lid deposits. The main point of the invention is to use a high-pressure water jet force to remove deposits on the gas passage and the tip of the knife edge.

  That is, the furnace cover cleaning device according to the present invention includes a side cleaner movable along the side surface to clean both sides of the furnace lid, and a lower surface movable along the lower surface to clean the lower surface of the furnace lid. A furnace lid cleaning device having a body frame with a cleaner and an upper surface cleaner movable along the upper surface to clean the upper surface of the furnace lid, wherein the side cleaner includes a vertical portion of a gas path of the furnace lid and a furnace A high pressure water jet rotary gun for cleaning the vertical part of the tip of the knife edge of the lid, and a rotary cutter for cleaning the vertical part of the insulation of the furnace lid, the lower surface cleaner is the lower part of the gas path of the furnace lid A high pressure water jet rotary gun for cleaning the horizontal part and the lower horizontal part of the knife edge tip of the furnace lid, and a rotary cutter for cleaning the lower horizontal part of the insulation of the furnace cover. Upper part of lid gas passage And the flat portion and characterized in that it comprises a high-pressure water jetting rotary gun for cleaning an upper horizontal portion of the knife edge tip of the furnace roof.

  According to the furnace cover cleaning device having the above-described configuration, the gas passage and the tip end portion of the knife edge are cleaned using high-pressure water jet force on both side surfaces and the lower surface of the furnace cover, and the heat insulating material is used. On the other hand, cleaning using a mechanical cutting force is performed. On the other hand, the top surface of the furnace lid uses less high-pressure water injection force for the gas passage and the tip of the knife edge because there are fewer deposits of tar, carbon, etc. Only cleaning is performed.

  Further, the furnace cleaner according to the present invention more preferably employs a configuration in which the moving speed of the side cleaner in the upper and middle parts of the furnace lid is set higher than the moving speed of the side cleaner in the lower part of the furnace lid. preferable. This is because, in the height direction of the furnace lid, the amounts of adhering tar and carbon differ, and the upper part and the middle part are relatively small, and the lower part is more. And when moving while injecting high-pressure water from a high-pressure water-injection rotary gun, the cleaning energy given to the cleaning surface is higher when the moving speed is slower. Therefore, the movement speed of the side cleaner is changed in accordance with the tar and carbon adhesion tendency of the furnace lid, that is, at the lower part of the furnace lid, the cleaning effect is improved by slowing the movement speed of the side cleaner. In the upper and middle parts where there is no hindrance, the cleaning time is shortened by increasing the moving speed of the side cleaner.

  Moreover, it is more preferable that the furnace cover cleaning device according to the present invention adopts a configuration in which the high-pressure water injection rotary gun is configured so that the distance between the rotation center and the high-pressure water injection point is variable. Gas passages for removing deposits such as tar and carbon using high-pressure water injection force have a certain width and differ depending on the furnace group. In addition to the gas path, the tip of the knife edge must be included in the cleaning width. According to such a configuration, it is possible to widen the cleaning effective width.

  As described above, according to the present invention, (1) the gas path deposit removal method is a non-contact method using high-pressure water injection force, so that it is not damaged, and (2) the furnace lid and the furnace lid are cleaned. Even if there is a front / rear / left / right shift in alignment with the device, a sufficient cleaning effect can be obtained by providing a margin for the high-pressure water injection width. (3) The cleaning method using the high-pressure water injection force is cleaning. Since there is no mechanical contact with the surface, the upper, lower, left and right corners of the gas passage easily pass through, and the deposits are scattered by the jetting force, so there is no clogging of the deposits (4 ) When the attached tar temperature is high, it is soft, but it is cooled by jetting high-pressure water and is scattered by jet force, so it can be cleaned even with soft tar. To expand until you can include Removable I, nor damaging an effect that.

  Hereinafter, a furnace cover cleaning device according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the furnace lid cleaning apparatus according to the present embodiment cleans the left and right side surfaces of the furnace lid 1 (removes deposits), the side cleaner 20 that cleans the lower surface of the furnace lid 1, and the furnace lid. An upper surface cleaner 40 that cleans the upper surface of 1, a driving device 50 that moves the side cleaner 20 up and down, a driving device 60 that operates the lower surface cleaner 30 in a traversing manner, and a driving device 70 that operates the upper surface cleaner 40 in a traversing manner are respectively attached to the body frame 10 The main body frame 10 is assembled and attached to a moving machine (an extruder or a guide car) via a suspension device 15.

  As shown in FIG. 2, the side surface cleaner 20 includes the vertical portions 7 a and 7 b of the gas passage 7 and the vertical portions 4 a and 4 b at the tip of the knife edge 4. Rotating cutters 202 and 202 for cleaning the parts (side surfaces) 5a and 5b, and an opening / closing device 203 for pressing the rotating cutters 202 and 202 to the vertical parts 5a and 5b of the heat insulating material 5 are incorporated in the lifting carriage 200, respectively. ing.

  The high-pressure water injection rotary gun 201 (the same applies to high-pressure water injection guns 301 and 401 described later) includes a nozzle holder at the tip, and an injection nozzle is attached to the nozzle holder. The injection nozzle is attached at a position away from the rotation center of the nozzle holder. For example, if the nozzle holder is rotated by an actuator, the injection nozzle attachment pitch to the nozzle holder (twice the distance between the attachment position and the rotation center). Value) The width is the effective cleaning width.

  In addition, wheels 204 are mounted at the up / down / left / right positions on the lift carriage 200 so that the lift carriage 200 can stably move up and down using the main body frame 10 as a guide. And the raising / lowering operation | movement of the side cleaner 20 is performed by the chains 500 and 500 (refer also FIG. 1) connected with the drive device 50. FIG. Reference numeral 205 denotes a hydraulic motor for rotating the rotary cutter 202, and 206 denotes a pneumatic cylinder constituting the opening / closing device 203.

  As shown in FIG. 3, the lower surface cleaner 30 includes a high pressure water injection rotary gun 301 for cleaning the lower horizontal portion 7 c of the gas passage 7 and the lower horizontal portion 4 c at the tip of the knife edge 4, and the lower horizontal portion (lower surface) of the heat insulating material 5. ) A rotary cutter 302 for cleaning 5c and a cutter lifting device 303 for pressing the rotary cutter 302 to the lower horizontal portion 5c of the heat insulating material 5 are incorporated in the traversing carriage 300, respectively.

  Further, on the traversing cart 300, wheels 304 for stably traversing the traversing cart 300 are attached to the front, rear, left and right positions with the traverse rail 100 attached to the lower part of the main body frame 10 as a guide. The traversing operation of the lower surface cleaner 30 is performed by a hydraulic cylinder 600 that constitutes the drive device 60. Reference numeral 305 denotes a hydraulic motor for rotating the rotary cutter 302, and reference numeral 306 denotes a pneumatic cylinder constituting the lifting device 303.

  As shown in FIG. 4, the upper surface cleaner 40 includes a high pressure water injection rotary gun 401 for cleaning the upper horizontal portion 7 d of the gas passage 7 and the upper horizontal portion 4 d at the tip of the knife edge 4, and the upper horizontal portion (upper surface) of the heat insulating material 5. ) Scrapers 402 for cleaning 5d are incorporated in the traversing cart 400, respectively.

  In addition, wheels 403 for stably traversing the traversing carriage 400 are attached to the traversing carriage 400 at the front, rear, left and right positions with the traverse rail 101 attached to the upper part of the main body frame 10 as a guide. The traversing operation of the upper surface cleaner 40 is performed by a hydraulic cylinder 700 that constitutes the driving device 70.

  As shown in FIG. 5, the driving device 50 is provided on the upper part of the main body frame 10, and determines a speed change point and an operating limit at the time of lifting and lowering, an electric motor 501 with a speed reducer that is a power source for lifting and lowering the side cleaner 20. A rotary limit switch 502 for connecting the motor 501 with a reduction gear to the rotary limit switch 502, a sprocket 504, 505 for power transmission, a chain 506 for power transmission, and the side cleaner 20 directly. Sprockets 507 and 508 that support the suspended chains 500 and 500 are provided.

  The furnace cover cleaning device according to the present embodiment includes (1) a high-pressure water pump facility that is a source of high-pressure water, (2) a high-pressure water switching valve stand that controls high-pressure water, and (3) water from the ground side. Water supply hopper for receiving, (4) water tank for storing water, (5) hydraulic pressure, pneumatic source and valve stand, (6) electromagnetic control panel for controlling each facility, (7) for operation And a machine-side operation panel for maintenance and inspection. In addition to the above, there are water, hydraulic pressure, pneumatic pressure, lubrication, electrical utility transfer, transmission piping, and wiring, and these are integrated to constitute a furnace cover cleaning device.

  The configuration of the furnace cover cleaning device according to the present embodiment is as described above. The furnace lid 1 is removed from the coke oven by a furnace lid desorption device (door lifter), turns 90 degrees, and faces the furnace lid cleaning device. At this time, the side cleaner 20 is in the upper limit position. Thereafter, the high-pressure water injection rotary guns 201 and 201 inject high-pressure water, and start to descend the side cleaner 20 at a low speed (for example, 40 to 80 mm / sec) while rotating. When the rotary cutters 202 and 202 attached to the side cleaner 20 reach the upper horizontal portion 5d of the heat insulating material 5 of the furnace lid 1, the pneumatic cylinder 206 of the opening / closing device 203 is operated to While rotating the rotary cutters 202, 202 to the upper end and simultaneously rotating the rotary cutters 202, 202 by the hydraulic motors 205, 205, the speed is changed from this point to a high speed (for example, 90 to 180 mm / sec) and the side cleaner 20 Is lowered.

  Tar and carbon adhering to the furnace lid 1 decrease at the upper part and increase as it lowers at the lower part. Therefore, the moving speed of the side cleaner 20 is changed again to a low speed (for example, 40 to 80 mm / sec) at a height position of about 1/4 from the lower part in the height direction, lowered to the lower limit, and lowered to the lower limit position. The rotation of the high-pressure water injection rotary guns 201 and 201, the high-pressure water injection and the rotation of the rotary cutters 202 and 202 are stopped, and at the same time, the pneumatic cylinder 206 of the opening / closing device 203 is operated. To release.

  When the side surface cleaner 20 is at the lower limit position, high pressure water is jetted from the high pressure water jet rotating gun 401 of the top surface cleaner 40, and the top surface cleaner 40 is moved at high speed while rotating. Since the amount of tar and carbon adhering to the upper horizontal portion 7d of the gas path of the furnace lid 1 and the upper horizontal portion 4d at the tip of the knife edge 4 is small, it is not necessary to move at a low speed. The upper surface cleaner 40 is reversed at the moving end, returned to a fixed position at a high speed, the rotation of the high-pressure water injection rotary gun 401 and the high-pressure water injection are stopped at the fixed position, and the cleaning operation is completed. In the upper horizontal portion 5d of the heat insulating material 5, coke that has been carbonized remains, and there is no fixed tar or carbon. Therefore, it is sufficient to move the scraper 402 without providing the rotary cutters 202 and 302 unlike the side surface cleaner 20 and the lower surface cleaner 30.

  After completion of the cleaning operation of the upper surface cleaner 40, high pressure water is injected from the high pressure water injection rotary guns 201, 201 of the side surface cleaner 20 at the lower limit, and the side cleaner 20 is started to rise at a low speed while rotating. When the rotary cutters 202, 202 of the side cleaner 20 reach the position of the lower horizontal portion 5 c of the heat insulating material 5, the pneumatic cylinder 206 of the opening / closing device 203 is operated, and the rotary cutters 202, 202 are placed at the lower end of the heat insulating material 5. At the same time, while the rotary cutters 202 and 202 are rotated by the hydraulic motors 205 and 205, the side cleaner 20 is raised at a low speed to a position where the speed is converted to a low speed when lowered. From the speed conversion point, the pressure is increased to the upper limit at high speed, and the rotation of the high-pressure water injection rotary guns 201 and 201 and the high-pressure water injection and the rotation of the rotary cutters 202 and 202 are stopped at the upper limit position. Is operated to release the crimping of the rotary cutters 202, 202 from the heat insulating material 5, and the cleaning operation of the side surface cleaner 20 is completed.

  The fixed position of the lower surface cleaner 30 is the center. When the side cleaner 20 is in the upper limit fixed position, the pneumatic cylinder 306 of the lifting device 303 attached to the lower surface cleaner 30 is operated to press the rotary cutter 302 against the lower horizontal portion 5c of the heat insulating material 5, and at the same time The rotary cutter 302 is rotated by the hydraulic motor 305. At this time, the high-pressure water injection rotary gun 301 is also raised to the cleaning position of the lower horizontal portion 7 c of the gas passage 7 and the lower horizontal portion 4 c at the tip of the knife edge 4. Therefore, after the high-pressure water is jetted from the high-pressure water injection rotary gun 301 and rotated, the lower surface cleaner 30 is traversed to the right (or left) at a low speed, and then reversed at the right (or left) end. 30 is inverted at the left (or right) traverse and left (or right) end, and then returned to the center. At the center position, the rotation of the high pressure water injection rotary gun 301, the high pressure water injection and the rotation of the rotary cutter 302 are stopped, and at the same time, the pneumatic cylinder 306 of the elevating device 303 is operated to press the rotary cutter 302 from the heat insulating material 5. The cleaning operation of the lower surface cleaner 30 is completed.

  As a matter of course, high-pressure water, hydraulic pressure, pneumatic pressure, and electric facilities are in operation while the cleaners 20, 30, and 40 are in operation. For high-pressure water, water is received from the ground with a water supply hopper and stored in a water supply tank. There are two methods of water supply from the ground: automatic water supply using a motor valve and manual water supply that connects a hose manually. The water quality is basically clean water (drinking water), but it is also possible to use industrial water and circulating water by adding a filter in the middle of the water supply pipe. In many cases, the hydraulic power source and the pneumatic pressure source use equipment of a mobile device. There are full-automatic and manual operation methods, which can be selected. The above-described operation order is an example, and naturally the order can be freely changed.

  Features of the furnace cover cleaning device according to the present embodiment are (1) combined use of high-pressure water injection force (high-pressure water injection rotary guns 201, 301, 401) and mechanical cutting (rotary cutters 202, 302), (2) side cleaner. 20 multi-stage conversion of moving time, and (3) ensuring the effective cleaning width of the high-pressure water injection rotary guns 201, 301, 401.

  The use of high-pressure water injection force for removing the deposits on the furnace lid 1 is an important point of the present embodiment, but it is also an important point to combine the mechanical rotary cutters 202 and 302. It is possible to remove (clean) the deposits including the heat insulating material 5 only by the high-pressure water jet force, but the cleaning area of the heat insulating material 5 is large, so a large amount of water is required, and a large amount of water is removed. The problem of rapid cooling of the heat insulating material 5 due to use also occurs.

  The removal of deposits on the gas path 7 and the edge of the knife edge 4 of the furnace lid 1 is to prevent environmental pollution and coke ashing, which are the original purposes of the furnace lid cleaning. The removal is an operational requirement relating to the margin when the furnace lid 1 is mounted on the coke oven, and its integrity is not so required. Therefore, mechanical rotary cutters 202 and 302 are sufficient. Moreover, since the furnace lid 1 immediately after taking out from a coke oven is high temperature, the amount of water to be used should be as small as possible.

  The cleaning effect by high-pressure water jet is determined by the striking force applied to the deposit removal surface (cleaning surface). The batting force is according to the following formula.

Ｆ：掃除面に与える打力（ｋｇｆ）
Ｑ：噴射水量（Ｌ／ｍｉｎ）
ｇ：重力加速度（９．８ｍ／ｓ²）
ｐ：噴射圧力（ｋｇｆ／ｃｍ²Ｇ）
Ｓ：噴射ノズル先端から掃除面までの距離（ｃｍ）
Ｌ：噴射到達面までの距離（ｃｍ）
上式のＬは、噴射ノズルの性能で決まる値で、通常Ｌ≒１００ｃｍ、Ｓは３０〜５０ｍｍが限界である（図６参照）。また、掃除効果を上げるために必要な打力は、種々の実験と実績からＦ＞３．０ｋｇｆの関係にある。

F: Strike force applied to the cleaning surface (kgf)
Q: Injection water volume (L / min)
g: Gravity acceleration (9.8 m / s ² )
p: injection pressure (kgf / cm ² G)
S: Distance from the tip of the injection nozzle to the cleaning surface (cm)
L: Distance to the injection surface (cm)
L in the above equation is a value determined by the performance of the injection nozzle, and normally L≈100 cm, and S has a limit of 30 to 50 mm (see FIG. 6). Further, the striking force required to increase the cleaning effect has a relationship of F> 3.0 kgf based on various experiments and results.

The gas passage 7 has tar and carbon adhering to it during coal carbonization, and the gas passage is blocked. The ratio at which the gas passage cross-sectional area is blocked is called a blockage rate and is expressed in percent (%). The cleaning energy (injection force) for removing the blocked tar and carbon is represented by the product of the amount of water and the pressure, and the relationship is as shown in FIG. If a constant injection pressure of the high pressure water (e.g., ^{350kgf / cm 2 ~550kgf / cm 2} ), when lowering the 100% occlusion rate up to 20% occlusion rate, i.e. the required flow rate for an improvement of 80% is about Q _L ≈25 _L / min. However, the furnace cover cleaning apparatus according to the present embodiment is used on a condition that it is used every time the coke is extruded, and the clogging rate in one coal dry distillation does not become 100% but is 70 to 80%. Accordingly, the improvement rate at this time is 50 to 60%, and the cleaning energy (required flow rate) may be small (Q _L ≈15 to 18 _L / min).

  As shown in FIG. 6, the water sprayed from the spray nozzle goes straight, reaches the deposit removal surface (cleaning surface), and destroys the deposit, but the breakdown width is about the nozzle diameter as a result of the experiment. 10 times. For example, the effective cleaning width of a 0.7 mm diameter nozzle is 7 mm. Therefore, it is a requirement that the high-pressure water jet trajectory has a pitch of 7 mm. FIG. 8 shows an injection locus when the cleaners 20, 30, 40 are moved while rotating the high-pressure water injection rotary guns 201, 301, 401.

  The gas passage 7 that removes deposits such as tar and carbon by using the injection force of high-pressure water has a certain width and varies depending on the furnace group. Further, not only the gas passage 7 but also the tip of the knife edge 4 must be included in the effective cleaning width. The high-pressure water injection rotary guns 201, 301, 401 according to the present embodiment can adjust the cleaning effective width to the gas passage width by changing the injection nozzle mounting pitch (80 mm in the figure) shown in FIG. It is also possible to widen the effective cleaning width by changing the nozzle mounting angle.

On the other hand, the cutting ability of the carbonized tar adhering to the side surface of the heat insulating material 5 of the rotary cutter 202 can be obtained by the following equation with reference to FIG.
_{P = K p · b · h} m ··· ( Equation 2)
P: Required cutting capacity (kgf)
K _p : Specific cutting force (kgf / mm ² )
b: Adhesive carbon width to be cut (mm)
h _m : Average cutting carbon thickness (mm)
From the above equation, P≈170 kgf is set as a standard, assuming that the carbon amount of 5 mm considered to be adhered by one coal dry distillation after passing through one cutter is removed. However, since the side cleaner 20 is actually moved up and down, the number of passes through the cleaning surface is two.

  Here, in the height direction of the furnace lid 1, the amounts of adhering tar and carbon are different. That is, the upper part and the middle part are relatively small, and the lower part is more. When the high pressure water jet rotating gun 201 is moved while jetting high pressure water, the slower the moving speed, the higher the cleaning energy given to the cleaning surface. Therefore, the moving speed of the upper and middle portions of the furnace lid 1 with a small blockage rate can be increased, and the moving speed can be decreased toward the lower portion. The amount of deposits in the length direction of the furnace lid 1 generally has the above tendency, but there is a difference in tendency for each furnace lid 1. The furnace cover cleaning device according to the present embodiment employs a frequency control system for controlling the raising and lowering drive of the side cleaner 20, and the moving speed of the side cleaner 20 is stepless in accordance with the tar and carbon adhesion tendency of the furnace lid 1. Multistage changes are possible. In addition, the cleaning time can be shortened.

  As described above, according to the furnace cover cleaning device according to the present embodiment using both the high pressure water injection force and the mechanical rotary cutter, (1) the non-contact method in which the deposit removal method of the gas passage 7 uses the high pressure water injection force. Therefore, there is no damage, and (2) even if there is a front / rear / left / right shift in the alignment of the furnace lid 1 and the furnace lid cleaning device, it is sufficient to provide a margin for the high-pressure water injection width. A cleaning effect can be obtained. (3) Since the cleaning method using high-pressure water injection force does not make mechanical contact with the cleaning surface, the upper, lower, left and right corners of the gas passage 7 easily pass through. Since the deposits are scattered by the injection force, there is no occurrence of clogging of the deposits. (4) When the adhesion tar temperature is high, it is soft, but it is cooled by injecting high-pressure water. Because it is scattered, even soft tar can be cleaned (5 Injection width of the high pressure water can be removed by extending until it can include a knife edge 4 tip, nor damaging an effect that.

  Moreover, the raising / lowering drive of the side cleaner 20 is an electric motor. By controlling the frequency of this electric motor, the lifting speed can be converted steplessly. By utilizing this, the upper part of the furnace lid 1 that is hard and has a small amount of adhesion is high-speed, and the lower part of the furnace lid 1 that is soft and has a large amount of adhesion is low-speed. The highest cleaning effect can be obtained within a given time (coke extrusion time (about 2 minutes)).

  Furthermore, the furnace cover cleaning apparatus according to the present embodiment uses pneumatic cylinders 206 and 306 that are compressible for pressure bonding of the rotary cutters 202 and 302 to the side surfaces and the lower surface of the heat insulating material 5. The response is fast, the followability of the rotary cutters 202 and 302 to the cleaning surface is high, and the residue remaining after removing the deposits can be eliminated. That is, when hydraulic pressure is used for the actuator, since the pressure oil is an incompressible liquid, the response to the unevenness of the side surface and the lower surface of the heat insulating material 5 is slow, and it is difficult to adhere to the cleaning surface. By using pressured air, it responds sensitively to irregularities on the side and bottom surfaces of the heat insulating material 5, left and right and top and bottom misalignment, inclination, and more to rotate the rotary cutters 202, 302 to the cleaning surface compared to hydraulic pressure It can be made to adhere and the cleaning effect can be enhanced.

  Further, in the prior art furnace lid cleaning device, since the cleaning method of the gas passage 7 is a mechanical scraper method, centering is not possible unless it is advanced toward the furnace lid 1, but the cleaning direction of the gas passage is high-pressure water. In the case of injection, the installation position of the cleaning device can be adjusted to the swivel position of the furnace lid 1, the support frame and the forward / backward movement device can be fixed, reducing the alignment time and alignment Accuracy can be increased. The furnace cover cleaning device may be moved back and forth as usual.

  Furthermore, the side cleaner 20 is provided with an opening / closing device 203 by aligning the furnace lid cleaning device and the furnace lid, and there is a margin on the left and right of the rotary cutters 202, 202. If the cleaning mechanism of the gas passage 7 (the high-pressure water injection rotary gun 201) can be attached to the rotary cutter mounting bracket (a part of the lifting carriage 200), the gas passage 7 can be more accurately aligned. Since the gas path cleaning mechanism of the prior art furnace lid cleaning device is a scraper, this is not possible, but the furnace path cleaning device combined with high pressure water according to the present embodiment has a gas path cleaning mechanism of a high pressure water injection type. The rotary cutters 202 and 202 can be used as a common mount. Therefore, more accurate center alignment is possible and the cleaning effect is enhanced.

  In addition, it cannot be overemphasized that the furnace cover cleaning apparatus which concerns on this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, when tar and carbon adhering to the furnace lid 1 are removed by high-pressure water injection and mechanical cutting, the removed matter may stick to the tip of the injection nozzle and block the injection port. In order to prevent this, as shown in FIG. 10, the nozzle 201 is provided with a cover 201c (301c, 401c) having a high-pressure water passage opening 201d (301d, 401d) corresponding to the nozzle diameter at the tip of the injection nozzle 201a (301a, 401a). It is preferable to attach to the holder 201b (301b, 401b). The inside of the cover 201c (301c, 401c) always has a negative pressure because high-pressure water passes therethrough, and when the opening 201e (301e, 401e) is provided on the attachment side of the cover 201c (301c, 401c). The outside air is sucked and the air sucked from the high pressure water passage opening 201d (301d, 401d) at the front end of the cover is blown onto the cleaning surface together with the high pressure water at a high speed, and deposits such as tar and carbon adhering to the cleaning surface are removed. As a result, the cleaning effect can be further improved and clogging of the injection nozzle can be prevented as compared with the injection of only high-pressure water.

  When the injection of high-pressure water is stopped, the pressure inside the high-pressure water supply pipe to the injection nozzle temporarily becomes negative due to the siphon phenomenon, and dust floating in the atmosphere is sucked into the injection nozzle, and then the high-pressure water In order to prevent clogging, dust is accumulated in the arch shape in the injection nozzle when spraying, and automatically pressurizing the compressed air into the high-pressure water supply pipe at the same time as stopping the high-pressure water injection. It is preferable to supply a positive pressure so as not to suck dust.

  Further, soft tar and carbon are also attached to the side surface and the lower surface of the heat insulating material 5 to be cleaned by the rotary cutters 202 and 302, and when they are removed by the rotary cutters 202 and 302, they are attached to the cutter groove portions. Although clogging occurs, it is preferable to install a device for cleaning and cleaning the clogged rotary cutters 202 and 302 at fixed positions of the side cleaner 20 and the bottom cleaner 30. This cleaning device has several spray nozzles arranged at predetermined intervals, and when cleaning is completed, the rotary cutter 202 of the side cleaner 20 and the rotary cutter 302 of the lower surface cleaner 30 return to their home positions. The rotary cutters 202 and 302 are cleaned by spraying high-pressure water or compressed air from the spray nozzle. At this time, the rotary cutters 202 and 302 are rotated so that high-pressure water or compressed air is jetted around the entire circumference.

  Cleaning the furnace lid 1 is performed by removing the furnace lid 1 of the fire-burning kiln with a door lifter mounted on a mobile machine (extruder or guide car) and turning it, and then aligning the furnace lid 1 with the furnace lid cleaning device. Is carried out within the coke extrusion time. Centering is performed by turning the furnace cover 1 and the furnace cover cleaning device so that the furnace cover 1 and the furnace cover cleaning device face each other, and then the furnace cover cleaning device is advanced toward the furnace cover 1. A rack that supports the cleaning device is required, and there is a back-and-forth and left-and-right swing in order to move it. If the furnace lid 1 is removed by the door lifter mounted on the mobile unit and the position of the furnace lid cleaning device is adjusted to the swiveled position, the furnace lid cleaning device and the furnace lid 1 can be simply swung. The center alignment is completed. Accordingly, in this way, the forward / backward movement device and the support frame are not required, and the weight can be reduced, the alignment time is shortened, and the deviation after alignment is small. This is an important point for improving the cleaning effect. However, the rotary cutters 202 and 202 attached to the side surface cleaner 20 are higher than the height of the heat insulating material 5 of the furnace lid 1 in order to avoid interference between the furnace lid 1 and the furnace lid cleaning device when the furnace lid 1 turns. It must be in position.

  Further, the furnace lid 1 is supported by the door lifter and is aligned with the furnace lid cleaning device, and the door lifter continues to support the furnace lid 1 during the cleaning operation. The high pressure water is sprayed toward the tip of the knife edge 4 of the furnace lid 1 and the inner surface of the gas passage 7. At that time, the water is sprayed onto the door lifter, the main body frame 10 of the furnace lid cleaning device, the chain 500, the hose and other peripheral equipment. Scatters and causes rust generation, deterioration, and contamination, causing damage to equipment and malfunction of each operating part, particularly damage to the electrical system. For this reason, it is necessary to take protective measures so that the operating jet water does not scatter around. Therefore, as shown in FIG. 11, when the alignment is completed, a flexible wiper seal 207 using a stainless steel wire is brought into close contact with both sides of the furnace lid 1 (of the furnace lid body 2), and the spray water is on the opposite side of the injection. It is preferable to attach a scatter preventing device composed of a pair of waterproof plates 208, 208 that prevents the scatter. Here, in the case of adopting a system in which the furnace lid 1 is removed by the door lifter mounted on the mobile unit and the position of the furnace lid cleaning device is adjusted to the swiveled position, the waterproof plate on the entry side of the furnace lid 1 208 becomes a structure which can be opened and closed according to the entrance and exit of the furnace lid 1.

  Moreover, although the furnace cover cleaning apparatus which concerns on the said embodiment wash | cleans the knife edge 4 front-end | tip of the furnace cover 1, and the perimeter of the gas passage 7, as mentioned above, as a facility which supplies water, a water supply hopper, water storage There are various pipes including tanks, high-pressure water pumps, switching valves and hoses. In cold regions, these water-related equipment cannot be washed by freezing water, or the volume of water expands due to freezing, resulting in damage to equipment including piping. Therefore, as a countermeasure for preventing freezing of the furnace cover cleaning device and related equipment, there are an electric heater method and a method of discharging water in the equipment using air pressure, and it is preferable to use both methods in combination. Specifically, (1) the water receiving hopper and the water storage tank are wound with a trace electric heater, and a heat insulating material is attached on the trace heater, and (2) the high-pressure water pump switching valve is installed in a room where heat treatment is performed. Installed, installed in it, heated the whole room, (3) fixed water piping wrapped with a tape electric heater, heat insulation was attached on it, and (4) flexible part was a high-pressure hose Use a flexible heat insulation heater for the hose, and keep the insulation heat from above. (5) The high pressure water jet rotary guns 201, 301, 401 are wound around the gun body with a tape electric heater. Insulate the top to keep warm. In addition, when continuous use of the furnace cover cleaning device is stopped, a pneumatic circuit is provided for draining water in the water-related equipment (mainly piping and high-pressure water injection rotary guns 201, 301, 401) after the switching valve, After the cleaning operation is stopped, compressed air is sent into the water pipe to drain the water in the facility. However, since it is difficult to drain water using pressurized air from the receiving hopper, water storage tank, high-pressure water pump, and switching valve, heat up.

It is a furnace cover cleaning apparatus which concerns on this embodiment, Comprising: (a) is a side view, (b) shows a front view. It is a side cleaner of the furnace cover cleaning apparatus which concerns on the same embodiment, Comprising: (a) is a top view, (b) shows a front view. It is a lower surface cleaner of the furnace-cleaner cleaning apparatus which concerns on the same embodiment, Comprising: (A) is a top view, (B) is a side view, (C) shows a front view. It is an upper surface cleaner of the furnace cover cleaning apparatus which concerns on the same embodiment, Comprising: (a) is a top view, (b) shows a front view. The top view of the drive device of the side cleaner of the furnace cover cleaning apparatus which concerns on the same embodiment is shown. Explanatory drawing regarding the high pressure water injection by the furnace cover cleaning apparatus which concerns on the same embodiment is shown. The relationship figure of a high pressure water injection flow rate and a gas passage blockage rate is shown. It is explanatory drawing regarding the locus | trajectory of the high pressure water injection by the furnace cover cleaning apparatus which concerns on the same embodiment, Comprising: (a) shows the case where there are two injection nozzles, and (b) shows the case where there is one injection nozzle. Explanatory drawing regarding the cutting by the furnace cover cleaning apparatus which concerns on the same embodiment is shown. The expanded sectional view in the front-end | tip part of the high-pressure water-injection rotary gun of the furnace cover cleaning apparatus which concerns on other embodiment is shown. The top view of the side surface cleaner vicinity of the furnace cover cleaning apparatus which concerns on other embodiment is shown. A cross-sectional plan view of the furnace lid is shown.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Furnace lid, 2 ... Furnace lid main body, 3 ... Steel plate, 4 ... Knife edge, 4a, 4b ... Vertical part, 4c ... Lower horizontal part, 4d ... Upper horizontal part, 5 ... Thermal insulation, 5a, 5b ... Vertical part (Side surface), 5c: lower horizontal portion (lower surface), 5d ... upper horizontal portion (upper surface), 6 ... furnace frame, 7 ... gas passage, 7a, 7b ... vertical portion, 7c ... lower horizontal portion, 7d ... upper horizontal portion DESCRIPTION OF SYMBOLS 10 ... Main body frame, 100 ... Traverse rail, 101 ... Traverse rail, 15 ... Suspension device, 20 ... Side cleaner, 200 ... Lifting carriage, 201 ... High pressure water injection rotary gun, 201a ... Injection nozzle, 201b ... Nozzle holder, 201c ... cover, 201d ... high pressure water passage opening, 201e ... opening, 202 ... rotary cutter, 203 ... opening / closing device, 204 ... wheel, 205 ... hydraulic motor, 206 ... pneumatic cylinder, 207 ... wiper seal, 08 ... Waterproof board, 30 ... Lower surface cleaner, 300 ... Transverse cart, 301 ... High pressure water injection rotary gun, 301a ... Injection nozzle, 301b ... Nozzle holder, 301c ... Cover, 301d ... High pressure water passage opening, 301e ... Opening, 302 ... Rotary cutter, 303 ... Lifting device, 304 ... Wheel, 305 ... Hydraulic motor, 306 ... Pneumatic cylinder, 40 ... Top cleaner, 400 ... Traversing cart, 401 ... High pressure water injection rotary gun, 401a ... Injection nozzle, 401b ... Nozzle holder, 401c ... cover, 401d ... high-pressure water passage opening, 401e ... opening, 402 ... scraper, 403 ... wheel, 50 ... drive device, 500 ... chain, 501 ... motor with speed reducer, 502 ... limit switch, 503 ... Coupling, 504, 505 ... Sprocket, 506 ... Chain, 60 ... Drive Location, 600 ... hydraulic cylinder, 70 ... drive unit, 700 ... hydraulic cylinder

Claims (3)

A side cleaner movable along the side surface to clean both sides of the furnace lid, a bottom surface cleaner movable along the bottom surface to clean the bottom surface of the furnace lid, and a top surface cleaner to clean the top surface of the furnace lid A furnace cover cleaning device provided with a main body frame and an upper surface cleaner movable along the upper surface,
The side cleaner consists of a high pressure water jet rotary gun for cleaning the vertical part of the gas path of the furnace cover and the vertical part of the knife edge tip of the furnace cover, and a rotary cutter for cleaning the vertical part of the insulation of the furnace cover. With
The bottom cleaner is a high pressure water jet rotary gun for cleaning the lower horizontal part of the gas path of the furnace cover and the lower horizontal part of the knife edge tip of the furnace cover, and for cleaning the lower horizontal part of the insulation of the furnace cover. With a rotating cutter,
The upper surface cleaner comprises a high pressure water injection rotary gun for cleaning the upper horizontal portion of the gas passage of the furnace lid and the upper horizontal portion of the knife edge tip of the furnace lid.   The furnace cover cleaning apparatus according to claim 1, wherein the moving speed of the side cleaner in the upper part and the middle part of the furnace cover is set faster than the moving speed of the side cleaner in the lower part of the furnace cover.   The furnace cover cleaning device according to claim 1 or 2, wherein the high-pressure water injection rotary gun is configured such that the distance between the rotation center and the high-pressure water injection point is variable.

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