JP2009144121A - Coke pusher and coke extrusion method in coke oven - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove carbon so that the amount of stuck carbon (thickness) not removed and remained in the longitudinal direction of a carbonization chamber is made even (i) and suppress the meandering of a ram head in the oven width direction when the ram head is going ahead (ii), on the assumption that the structure of a coke pusher uses a simple mechanical means. <P>SOLUTION: In the coke pusher of a coke oven provided with a scraping board for removing carbon stuck to the ceiling and oven walls of the carbonization chamber, which is installed at the upper part of the ram head for pushing out carbon from the carbonization chamber; a cylindrical tube, which has projections on its circumferential surface and rotates while being in contact with the carbon stuck to the ceiling of the carbonization chamber, is arranged horizontally (a); and cylindrical tubes, which have projections on circumferential surfaces thereof and rotate while being in contact with the carbon stuck to the oven walls of the carbonization chamber, are arranged vertically, in front of and at the left and right to the scraping board (b). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a coke extruder for a coke oven and an extrusion method, in particular, a coke extruder equipped with a device for removing carbon adhering to the ceiling and furnace wall of a carbonization chamber, and a coke extrusion method using the coke extruder. About.

  Hydrocarbon-based gas is generated when coke is produced by carbonizing in the carbonization chamber of a coke oven. The hydrocarbon-based gas is exhausted from the riser pipe of the carbonization chamber, but the hydrocarbon-based gas is thermally decomposed by the time it passes through the space above the carbonization chamber and reaches the riser pipe. ) Occurs and adheres to the ceiling and furnace wall of the carbonization chamber.

  The carbon adhering to the inside of the carbonization chamber of the coke oven is initially sponge-like (has many pores) and can be easily removed by combustion by introducing an oxygen-containing gas or by mechanical means. During repeated carbonization (repeating charging and discharging of coal into the carbonization chamber), carbon enters and accumulates in the pores, and the sponge-like carbon gradually becomes hard carbon.

  If carbon adheres to and accumulates on the ceiling or furnace wall of the carbonization chamber, the air permeability of the upper space of the carbonization chamber deteriorates, carbon is easily generated from the hydrocarbon-based gas, and becomes an obstacle when extruding coke. Further, when the carbon is hardened, when the coke is extruded, the degree of meandering of the ram head of the extruder is increased, the force of pushing out the ram head is increased, and the furnace wall of the carbonization chamber may be damaged.

  Therefore, many devices and methods for removing carbon adhering to the ceiling and furnace wall of the carbonization chamber have been proposed so far. These proposals can be broadly classified into the following three types in terms of the carbon removal means and methods employed.

(1) A method (contact method) in which carbon is scraped off with a carbon cutter (carbon scraper) or a scraper (for example, Japanese Utility Model Laid-Open No. 58-34935 and Japanese Patent Application Laid-Open No. 2001-200258).
(2) A method of generating low-frequency sound with an acoustic transmission device and removing carbon with sound pressure (non-contact method) (for example, JP-A-2-24392)
(3) A method in which carbon is burned and removed by an oxygen-containing gas or air (non-contact method) (for example, JP 59-25879, JP 2006-124559, JP 2007-70527, (Japanese Unexamined Patent Application Publication Nos. 2007-119557 and 2007-169533)

  According to the above method (1), carbon can be efficiently removed by mechanical means having a simple structure, but the amount of carbon attached (thickness) in the longitudinal direction of the carbonization chamber is non-uniform. The amount of carbon removal becomes uneven, and when the ram head moves forward, there is a danger of meandering in the furnace width direction and breaking the furnace wall brick.

  According to the above method (2), the carbon removal device must be large, and the equipment cost rises, which increases the production cost of coke.

  According to the above method (3), since it takes time to remove carbon, when the operating rate of the coke oven is high, a sufficient carbon removal effect cannot be expected.

  In view of the current state of carbon removal technology related to a coke oven, the present invention is based on the premise that mechanical means with a simple structure is used. (I) Amount of attached carbon (thickness) remaining without being removed in the longitudinal direction of the carbonization chamber It is an object to remove the carbon so as to be uniform, and (ii) suppress meandering in the furnace width direction when the ram head advances.

  And this invention aims at providing the coke extruder provided with the carbon removal structure which solves the said subject.

  When removing carbon adhering to and depositing on the furnace wall of the carbonization chamber by mechanical means, the carbon removal amount in the longitudinal direction of the carbonization chamber becomes non-uniform when the carbon is hardened. The idea that the above problem (i) can be solved if the hardened carbon is weakened by any means or technique, and the above-described weakening means and technique have been studied earnestly.

  As a result, the inventors of the present invention, on the circumferential surface, on the front surface of a scraper provided on the top of the ram head of the coke extruder (scraping carbon adhering to the ceiling and furnace wall of the carbonization chamber when the ram head advances). When a cylindrical tube with protrusions is placed, and the coke is extruded, the cylindrical tube comes into contact with the hardened carbon that adheres to the ceiling and furnace wall of the carbonization chamber and is rotated. It was found that the carbonized carbon becomes brittle and easily drops off when it comes into contact with the scraper.

  Further, the present inventors, along with the perforations by the projections of the cylindrical tube, when the oxygen-containing gas is blown from the cylindrical tube to the hardened carbon, the oxygen-containing gas penetrates from the perforated holes to the inside of the carbon, It has been found that the hardened carbon can be efficiently burned and removed.

  This invention was made | formed based on the said knowledge, and the summary is as follows.

(1) In a coke extruder for a coke oven provided with a scraper that removes carbon adhering to the ceiling and furnace wall of the coking chamber at the upper part of the ram head that extrudes coke from the carbonizing chamber.
(A) A cylindrical tube that has a protrusion on the circumferential surface and rotates in contact with the carbon adhering to the furnace ceiling of the carbonization chamber is disposed horizontally on the front upper portion of the scraper,
(B) A coke oven characterized in that cylindrical pipes having protrusions on the circumferential surface and rotating in contact with the carbon adhering to the furnace wall of the carbonization chamber are vertically arranged on the front left and right of the scraper. Coke extruder.

  (2) The coke extruder for a coke oven according to (1), wherein the protrusion is a conical protrusion.

  (3) The coke extruder for a coke oven according to (1) or (2), wherein the cylindrical tube has a hollow structure and has a plurality of openings on a circumferential surface.

  (4) The coke extruder for a coke oven according to any one of (1) to (3), wherein a pipe for supplying a gas is connected to the cylindrical tube.

  (5) The coke extruder for a coke oven according to (4), wherein the cylindrical pipe rotates around a pipe connected to the cylindrical pipe.

  (6) The coke extruder for a coke oven according to any one of (3) to (5), wherein the pipe is connected to a device that supplies compressed gas.

  (7) The coke extruder for a coke oven according to (6), wherein the compressed gas is an oxygen-containing gas.

  (8) In the coke oven extrusion method for extruding coke in the carbonization chamber using a coke extruder, the coke extruder for the coke oven according to any one of (1) to (7) above is used to extrude coke from the carbonization chamber. A coke extrusion method for a coke oven, wherein carbon adhering to a ceiling and a furnace wall of a carbonization chamber is removed.

  (9) The coke extrusion method for a coke oven according to (8), wherein an oxygen-containing gas is supplied to the cylindrical tube.

  According to the present invention, carbon adhering to the ceiling and furnace wall of the coking chamber can be efficiently removed while the ram beam of the coke extruder makes one reciprocation during the coke extrusion. As a result, the productivity of the coke oven does not decrease and the load on the furnace body is reduced, so that the life of the coke oven is extended.

  The present invention will be described with reference to the drawings.

  FIG. 1 shows a conventional coke extrusion mode in which a ram head is pushed into a carbonization chamber of a coke oven. Fig.1 (a) shows the partial aspect of a side surface, FIG.1 (b) shows a front aspect.

  The carbonizing chamber 1 of the coke oven is composed of a furnace ceiling 2, a furnace wall 3, and a furnace bottom 4 constructed of bricks. The coke extruder 5 includes a ram beam 6 having a ram shoe 7 and a ram head 8 attached to the tip of the ram beam 6. A scraper 9 is attached to the upper portion of the ram head 8.

  When the ram head 8 is pushed into the carbonization chamber 1 and the coke 10 is pushed out, the scraper 9 comes into contact with the furnace ceiling 2 and the carbon 11 attached to the furnace wall 3 following the furnace ceiling 2 to scrape off the carbon 11. .

  When the ram head 8 is pushed in and the coke 10 is pushed out, if the carbon 11 is hardened, the amount of carbon scraped off by the scraper 9 becomes non-uniform. If the uneven scraping continues, the uneven carbon thickness remaining on the furnace wall 3 becomes remarkable, and the ram head 8 meanders when the coke 10 is pushed out.

  If the ram head meanders, it will cause serious troubles in coke oven operation, in particular, strong contact with the upper part of the ram head, the furnace wall of the carbonization chamber, and breaking the bricks of the furnace wall. Therefore, it is necessary to evenly scrape the hard carbon adhering to the furnace ceiling and the furnace wall, and to keep the thickness of the carbon layer remaining on the furnace ceiling and the furnace wall always uniform.

  Therefore, in the coke extruder of the present invention (extruder of the present invention), as shown in FIG. 2, the coke extrusion direction D is the front, and (a) the scraper 9 provided at the upper part of the ram head 8 is disposed at the front upper part. A cylindrical tube 12 having a protrusion on the circumferential surface and rotating around the shaft 13 in contact with the carbon adhering to the furnace ceiling of the carbonization chamber, and (b) the scraper plate 9 Cylindrical tubes 12 having protrusions on the circumferential surface and rotating around the shaft 13 in contact with the carbon adhering to the furnace wall of the carbonization chamber are arranged vertically on the front left and right sides.

  FIG. 3 shows a mode in which the cylindrical pipes arranged at the front upper part and the front left and right of the scraper and the subsequent scraper cooperate to scrape off carbon adhering to the furnace ceiling and furnace wall of the carbonization chamber. 3A shows the positional relationship between the scraper 9 and the cylindrical tube 12 as viewed from above, and FIG. 3B shows the positional relationship between the scraper 9 and the cylindrical tube 12 as viewed from the side. c) shows the positional relationship between the scraper 9 and the cylindrical tube 12 in the pushing direction.

  When the ram head is advanced and the cylindrical tube 12 having the conical protrusions 14 arranged on the front upper part and the left and right sides of the scraper 9 is pressed against the carbon 11 attached to the furnace ceiling 2 and the furnace wall 3 of the carbonization chamber and rotated. The conical protrusion 14 bites into the carbon 11 and a hole is formed on the surface of the carbon 11.

  As a result, the hardened carbon 11 becomes brittle, and when the subsequent scraper 9 comes into contact with the carbon 11, the carbon 11 is easily dropped off.

  In this way, the cylindrical tubes disposed on the upper front part and the front left and right of the scraper cooperate with the subsequent scraper to scrape off carbon adhering to the furnace ceiling and furnace wall of the carbonization chamber. This is a feature of the extruder of the present invention.

  Although FIG. 3 shows a cylindrical tube having a conical protrusion on the circumferential surface, the protrusion can easily form a hole in carbon attached to the furnace ceiling and furnace wall of the carbonization chamber. As such, the tip may be sharp, and is not limited to a conical shape.

  Further, the cylindrical tube is not limited to the cylindrical tube shown in FIG. FIG. 4 shows another embodiment of the cylindrical tube. The cylindrical tube shown in FIG. 4 is a hollow cylindrical tube, the shaft 13 also serves as a pipe for supplying gas, and a projection 14 and an opening 15 are formed on the circumferential surface.

  When a gas, preferably an oxygen-containing gas, is supplied to the inside of the cylindrical tube 12 through a pipe, the oxygen-containing gas is blown out from the opening 15, but a hole 15 is formed by a protrusion 14 on the surface of the attached carbon. Therefore, the oxygen-containing gas blown out from the opening 15 of the cylindrical tube 12 penetrates into the attached carbon, burns the carbon, and contributes to the removal of the carbon.

  In this way, if an opening through which oxygen-containing gas blows out is provided in the cylindrical tube having the protrusions, the effect of burning and removing is superimposed on the effect of removing adhering carbon mechanically. Carbon adhering to the wall can be removed more efficiently.

  In addition, supplying gas through the shaft 13 and injecting the gas from the opening 15 of the cylindrical tube 12 exhibits an effect of air-cooling the shaft 13 and the cylindrical tube 12, so that a high temperature condition (for example, 1000 in the coking oven) is obtained. The durability of the above-mentioned member to be used at a lower temperature is increased.

  The oxygen-containing gas is preferably supplied as a compressed gas from the pipe to the cylindrical tube. Usually, air is used as the oxygen-containing gas, but oxygen-enriched air is preferable from the viewpoint of carbon combustion removal.

  Next, examples of the present invention will be described. The conditions of the examples are one example of conditions adopted for confirming the feasibility and effects of the present invention, and the present invention is limited to this one example of conditions. Is not to be done. The present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.

(Example)
Using the conventional coke extruder and the inventive extruder alternately, the coke oven was operated and the maximum current value for driving the coke extruder motor was measured.

  FIG. 5 shows the result. In the figure, the present invention non-implementation period is a period using a conventional coke extruder, and the present invention implementation period is a period using the present invention extruder. In addition, a vertical axis | shaft is a daily average value of a furnace group.

  In the period when the present invention is not implemented, the maximum current value tends to increase. This is considered to be because carbon adhering to the furnace ceiling and furnace wall of the carbonization chamber could not be sufficiently removed, the remaining carbon became hard, and the coke extrusion resistance increased.

  When the extruder of the present invention was used, the maximum current value for driving the coke extruder motor began to decrease. This is considered to be because the cylindrical tube provided in the extruder of the present invention functions to sufficiently remove carbon adhering to the furnace ceiling and furnace wall of the carbonization chamber, and the coke extrusion resistance is reduced.

  Again, using a conventional coke extruder, the maximum current value driving the coke extruder motor began to increase. Thus, the effect of the extruder of the present invention could be confirmed.

  As described above, according to the present invention, carbon adhering to the ceiling and the furnace wall of the carbonization chamber can be efficiently removed during coke extrusion. As a result, the productivity of the coke oven does not decrease and the load on the furnace body is reduced, so that the life of the coke oven is extended.

  Therefore, the present invention has high applicability in the coke manufacturing industry.

It is a figure which shows the conventional coke extrusion aspect which pushes a ram head in the carbonization chamber of a coke oven. (A) shows a partial aspect of the side surface, and (b) shows a front aspect. (A) A cylindrical tube having protrusions on the circumferential surface at the front upper part of the scraper 9 and rotating in contact with the carbon adhering to the furnace ceiling of the carbonization chamber is disposed horizontally, and the front of the scraper 9 It is a figure which shows the aspect which has arrange | positioned the cylindrical pipe | tube which has a processus | protrusion on the circumferential surface on either side, and rotates in contact with the carbon adhering to the furnace wall of a carbonization chamber. It is a figure which shows the aspect which scrapes off the carbon adhering to the furnace ceiling and furnace wall of a carbonization chamber in cooperation with the cylindrical pipe | tube arrange | positioned in the front upper part of a scraper, and the front left and right, and a subsequent scraper. (A) shows the positional relationship between the scraper and the cylindrical tube seen from above, (b) shows the positional relationship between the scraper and the cylindrical tube seen from the side, and (c) shows the scraper seen in the extrusion direction. And the positional relationship of the cylindrical tube. It is a figure which shows another aspect of a cylindrical tube. It is a figure which shows the effect of this invention extruder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Carbonization chamber 2 Furnace ceiling 3 Furnace wall 4 Furnace bottom 5 Coke extrusion machine 6 Ram beam 7 Ram shoe 8 Ram head 9 Scraper 10 Coke 11 Carbon 12 Cylindrical tube 13 Shaft 14 Protrusion 15 Opening D Extrusion direction

Claims (9)

In the coke extruder of the coke oven equipped with a scraper that removes carbon adhering to the ceiling and furnace wall of the carbonization chamber at the top of the ram head that extrudes coke from the carbonization chamber,
(A) A cylindrical tube that has a protrusion on the circumferential surface and rotates in contact with the carbon adhering to the furnace ceiling of the carbonization chamber is disposed horizontally on the front upper portion of the scraper,
(B) A coke oven characterized in that cylindrical pipes having protrusions on the circumferential surface and rotating in contact with the carbon adhering to the furnace wall of the carbonization chamber are vertically arranged on the front left and right of the scraper. Coke extruder.   The coke extruder for a coke oven according to claim 1, wherein the protrusion is a conical protrusion.   The coke extruder for a coke oven according to claim 1 or 2, wherein the cylindrical tube has a hollow structure and has a plurality of openings on a circumferential surface thereof.   A coke extruder for a coke oven according to any one of claims 1 to 3, wherein a pipe for supplying a gas is connected to the cylindrical pipe.   The coke extruder for a coke oven according to claim 4, wherein the cylindrical tube rotates around a pipe connected to the cylindrical tube.   The coke extruder for a coke oven according to any one of claims 3 to 5, wherein the pipe is connected to an apparatus for supplying compressed gas.   The coke extruder for a coke oven according to claim 6, wherein the compressed gas is an oxygen-containing gas.   In the coke oven extrusion method for extruding coke in the carbonization chamber with a coke extruder, the coke extruder of the coke oven according to any one of claims 1 to 7 is used to extrude coke from the carbonization chamber, A coke extrusion method for a coke oven, wherein carbon adhering to the furnace wall is removed.   The coke extrusion method for a coke oven according to claim 8, wherein an oxygen-containing gas is supplied to the cylindrical tube.

Images