JP5206080B2 - Coke oven drying method for burning - Google Patents

Description

  Regarding the method of drying the furnace body at the time of firing in the furnace body equipment of the coke oven, in particular, it is possible to prevent the plug bricks from falling off from the drying holes for drying the furnace body and to reduce the number of drying holes. The present invention relates to a furnace body drying method.

  The coke oven furnace body equipment has a heat storage chamber in the lower part of the furnace body, and has a structure in which carbonization chambers and combustion chambers are alternately arranged in the upper part. Coking of coal charged in the carbonization chambers arranged adjacent to each other is performed.

  The furnace equipment of such a coke oven is constructed by refractory brickwork, but the furnace body after the construction is in a moist state due to moisture contained in the refractory brick itself and joint mortar. It is necessary to dry the furnace body before the start of actual operation, so-called burning.

  Up to now, as a technique related to furnace body drying after furnace construction, for example, furnace bodies of industrial furnaces constructed with refractory bricks used in steelmaking, steelmaking, chemical industry, ceramic industry, etc., using combustion exhaust gas When drying, a method of measuring the temperature of the furnace wall portion and determining the degree of dryness of the furnace body after building (see, for example, Patent Document 1), as a furnace body drying method of a blast furnace, When drying the furnace brick by blowing hot air from the mouth, the drying temperature of the bricks dried by the hot air blown from the drying nozzle is detected by the multiple temperature sensors installed on the furnace brick. There has been proposed a method for drying a blast furnace brick in which the amount of hot air of the drying nozzle is adjusted by a hot air control valve attached to each hot air supply pipe so as to be uniform (see, for example, Patent Document 2). .

  The furnace bodies shown in these prior arts have a simple furnace body structure as compared with a coke oven, and there is no need to take special measures for ventilation of combustion exhaust gas for drying the furnace body.

  However, since the furnace body of the coke oven has a furnace body structure divided into a plurality of furnace chambers, in order to dry the furnace body after the brick building of the coke oven furnace, COG or light oil or the like is used in the carbonization chamber. It is necessary to burn the fuel, lead the combustion exhaust gas to the entire furnace body such as the combustion chamber, bellows, heat storage chamber, horizontal flue, etc., discharge it to the atmosphere from the flue / chimney, and dry the furnace body.

  The furnace wall that separates the carbonization chamber and the combustion chamber of the coke oven is installed with dowels etc. on the end face of the furnace wall brick corresponding to the joint, and the airtightness in the furnace operation is maintained. Only during the drying period, a drying hole for introducing the combustion exhaust gas from the carbonization chamber to the combustion chamber is provided. The drying hole is closed with plug bricks after the furnace body is dried. The number of drying holes is 20 to 40 / kiln. If too much time is required for the plugging operation, the kiln is opened for a long time, and the furnace body is cooled too much. Furthermore, there are about 2,000 plug bricks in the whole furnace, and if the plugging work is difficult, there is a problem that it takes a lot of labor and is not preferable.

  In addition, the drying hole is usually installed at the turning point of the combustion chamber. In this case, the drying hole is below the coal charge level in the carbonization chamber, and the plug brick plugged into the dry plug receiving brick is plugged. There was a frequent occurrence of the phenomenon that the coal was fixed to the coke along with the coking of the charged coal and discharged to the outside of the furnace together with the coke (the plug brick was removed). When the plug brick is detached, coal dry distillation gas leaks into the combustion chamber, causing black smoke from the chimney, which is undesirable.

  Various technologies related to the start-up of coke ovens have been proposed (see, for example, Patent Documents 3 and 4), but they relate to high-density silica bricks for coke ovens and technologies for preventing explosions in dry mains. No technology has been proposed for drying the furnace body at the time of firing in the furnace body equipment of the coke oven.

JP-A-1-273990 JP-A-7-173514 JP 11-116324 A JP 2007-45929 A

  Therefore, the present invention is intended to solve the above-mentioned problems, and facilitates the plugging operation of the drying hole of the drying plug receiving brick, and the coke adheres to the plug brick plugged in the drying hole. It is an object of the present invention to provide a method for drying a furnace body at the time of firing of a coke oven in which plug bricks generated by the above are prevented from falling off and the number of drying holes is reduced.

  The present inventor has eagerly studied to solve the above-mentioned problem, and when the drying hole of the drying plug receiving brick is installed near the ceiling at the top of the coke oven so that the carbonization chamber and the combustion chamber communicate with each other, the drying plug receiving brick It has been found that the plugging work can be facilitated and that the brick can be prevented from falling off when the coke is fixed to the plugged brick. In addition, it was found that the installation quantity of drying plug receiving bricks can be reduced by installing a drying connecting pipe communicating with the carbonization chamber and the combustion chamber on the furnace instead of the drying hole.

  The present invention has been completed based on these findings, and the gist of the invention is as follows.

(1) In a furnace body drying method at the time of firing in a furnace body facility of a coke oven having a structure in which a heat storage chamber is provided at a lower portion of the furnace body and combustion chambers and carbonization chambers are alternately arranged at an upper portion thereof, A drying plug receiving brick having a drying hole communicating with the carbonization chamber and the combustion chamber is disposed on the side wall of the furnace top portion above the coal charging level, and the combustion exhaust gas generated by burning the fuel in the carbonization chamber is the drying hole. Through the carbonization chamber to the combustion chamber and vent the combustion exhaust gas throughout the furnace to dry the furnace body. After drying the furnace body, plug brick is inserted into the drying hole of the dry plug receiving brick from the coal inlet and plugged. The furnace body drying method at the time of firing in the furnace body equipment of the coke oven characterized by performing.

  (2) The furnace wall at a position close to the coal charging inlet of the carbonization chamber is provided with a drying stopper receiving brick having a drying hole, and the flue of the combustion chamber at a position far from the coal charging inlet of the carbonization chamber is provided. One end of the drying connecting pipe is connected to the hole, the other end of the drying connecting pipe is connected to the coal charging inlet of the carbonization chamber, and the combustion exhaust gas generated by burning fuel in the carbonization chamber is connected to the drying hole and the drying communication. The furnace body is dried by guiding the combustion chamber from the carbonization chamber to the combustion chamber through the pipe and venting the combustion exhaust gas throughout the furnace. After drying the furnace body, the plug brick is inserted into the drying hole of the dry plug receiving brick from the coal inlet and plugged. The furnace body drying method at the time of burning in the furnace body equipment of the coke oven according to the above (1), wherein filling is performed and the drying communication pipe is removed.

  (3) The drying hole of the drying plug receiving brick has a drying hole portion having a diameter larger than the outer diameter of the plug brick and a tip of the plug brick so as to serve as a stopper that prevents the plug brick from falling to the combustion chamber side. The method for drying a furnace body at the time of firing in the furnace body equipment of a coke oven according to (1) or (2), wherein the drying hole portion has a diameter smaller than the outer diameter.

  (4) At the time of the firing in the furnace body equipment of the coke oven according to (2) or (3), wherein the drying communication pipe is structured to be fitted into a flue hole and a temporary entrance lid so as to be easily removed. Furnace body drying method.

  According to the present invention, conventionally, there are about 2,000 dry holes / whole furnace, and there is always about 10 pieces / year of falling off the plug bricks. Since it was installed above the plug bricks from the drying holes, black smoke was not generated, improving the environment, improving productivity, extending the life of the coke oven, and having drying holes. Since the drying plug receiving brick was installed at the top of the furnace, it became easy to plug the drying plug receiving brick. Furthermore, a drying communication pipe was installed instead of the drying hole for venting the carbonization chamber and the combustion chamber. As a result, the carbonization chamber was not opened for a long time, and the carbonization chamber was not overcooled. And the effort of plugging work has been reduced. Furthermore, the number of dry plug receiving bricks is reduced, and a remarkable effect is achieved in that the furnace body strength is improved.

  The coke oven has a heat storage chamber in the lower part of the furnace body, and has a structure in which combustion chambers and carbonization chambers are alternately arranged in the upper part, and by burning fuel in the combustion chamber, it is adjacent to the combustion chamber. Coal charged in the aligned carbonization chambers is carbonized to coke. The exhaust gas burned in the combustion chamber is discharged from the chimney to the atmosphere through the bellows, the heat storage chamber, and the flue. The carbonization chamber has a structure isolated from the combustion exhaust gas passage. In such a coke oven furnace structure, quartz brick is mainly used, which has high mechanical strength at high temperature, small volume change at high temperature, and relatively good thermal conductivity. Clay brick is used at the top of the furnace where there is a lot of heat.

  The furnace body equipment of the coke oven is constructed by refractory bricks such as silica brick and clay brick, but the furnace body after the construction is included in the refractory brick itself or the mortar of the brick joint (joint). It is necessary to dry the furnace body prior to the start of actual operation, so-called burning. In order to dry the furnace body, only during the drying period, COG (coke oven gas) or light oil is burned in the carbonization chamber, the combustion exhaust gas for drying is guided from the carbonization chamber to the combustion chamber, and the combustion exhaust gas is spread throughout the furnace. Do it by ventilating. However, the furnace wall that separates the carbonization chamber and combustion chamber of the coke oven has a dowel etc. on the end face of the furnace wall brick that corresponds to the joint, and keeps hermeticity in the actual operation of the furnace wall. If there is no vent hole communicating with the carbonization chamber and the combustion chamber, the flue gas for drying is led from the carbonization chamber to the combustion chamber, and the flue gas for drying is ventilated throughout the furnace to dry the furnace body. I can't.

  FIG. 1 is a partial cross-sectional view in the length direction (direction in which coke is pushed out by a pusher) between a carbonization chamber and a combustion chamber of a conventional coke oven.

  Conventionally, as shown in FIG. 1, in order to connect a carbonization chamber 1 having a coal charging inlet 6 and a combustion chamber 2 having a flue hole 7, the carbonization chamber 1 and the combustion chamber are bricked on a heat storage chamber. A drying plug receiving brick 4 having a drying hole 3 is installed in the upper part of the furnace wall that divides 2 and the carbonizing chamber 1 and the combustion chamber 2 are communicated with each other through the drying hole 3. The drying hole 3 is usually provided at a turning point portion of the combustion chamber below the ceiling 8 of the furnace top portion 5 and is installed below the coal charge level 9. The combustion exhaust gas for drying combusted in the carbonization chamber 1 is led to the combustion chamber 2 through the drying hole 3 of the drying plug receiving brick 4 to dry the furnace body.

After drying the furnace body, plugging work is performed in which the plug brick is inserted into the drying hole 3 of the drying plug receiving brick 4 to close the drying hole 3. The plugging operation for closing the drying hole 3 is performed by attaching a plug brick to the tip of the plugging jig and inserting a rod-shaped jig from the coal inlet provided above the carbonization chamber to dry the plug brick. It is inserted into the drying hole of the receiving brick and plugged, and the drying hole is closed permanently. The outer surface of the plug brick is coated with mortar, the joint between the plug brick and the dry plug receiving brick is joined with no gap between the mortar, the drying hole is closed with the plug brick, and the plug brick is dried. It is designed not to fall off from the stopper receiving brick. The number of dry plug receiving bricks is 20 to 40 / kiln. If too much time is required for the plugging operation, the kiln is opened for a long time and the furnace body is cooled too much, which is not preferable. Furthermore, there are about 2,000 plug bricks in the entire furnace, and there is a problem that a lot of labor is required if the plugging work is difficult.
In addition, when plug bricks fall off during the actual operation of the coke oven, there is a problem that coal dry distillation gas generated in the carbonization chamber leaks into the combustion chamber and black smoke is frequently generated from the chimney. Since there are 2000 pieces of plug bricks in the whole coke oven, such plug bricks were always dropped out at about 10 pieces / year.
When the present inventor investigated the problem of falling off the plug brick, the installation position of the dry plug receiving brick with a dry hole is below the coal charge level. It was found that when the coke was fixed to the receiving brick, the plug brick was pushed out of the dry stopper receiving brick together with the coke and dropped off when the coke was discharged from the kiln.

Therefore, in the present invention, the drying plug receiving brick is arranged at the top of the furnace above the coal charging level, and the distance from the coal charging inlet to the drying hole is shortened so that the plugging work can be easily performed.
And by making the drying hole above the coal charging level, the coke is prevented from sticking to the plug brick plugged into the dry plug receiving brick, and the plug brick is prevented from falling off when the coke is pushed out. .

  The installation position of the drying plug receiving brick according to the present invention in the coke oven will be described with reference to the drawings.

  FIG. 2 is a partial cross-sectional view of the carbonization chamber and the combustion chamber in the furnace group length direction in the coke oven according to the present invention.

  As shown in FIG. 2, in the coke oven, the carbonization chambers 1 and the combustion chambers 2 partitioned by the bricks of the furnace wall are alternately arranged. It has become. A coal charging inlet 6 is provided at the top 5 of the carbonization chamber 1, and during operation of the coke oven, the space from the coal charging level of the carbonization chamber 1 to the 8 parts of the ceiling (furnace top space) is a carbonization chamber. This is a passage for discharging the generated dry distillation gas from the ascending pipe 10. The upper portion of the combustion chamber 2 is a flew hole 7.

  In the present invention, the drying plug receiving brick 4 is disposed in the furnace top 5 above the coal charging level 9. Specifically, the drying stopper receiving brick 4 is provided in the vicinity of the carbonization chamber ceiling 8 of the furnace top 5 immediately below the coal charging inlet 6 of the carbonization chamber 1 and directly below the rising pipe 10. Since this portion has a large brick thickness, even if the drying hole 3 is provided, the decrease in furnace strength is small. The drying hole 3 of the drying plug receiving brick 4 is connected to the coal inlet 6 of the carbonization chamber 1 and the flue hole 7 of the combustion chamber 2 so as to communicate with each other. Thereby, the combustion exhaust gas for drying the furnace body can be guided through the drying hole 3 from the carbonization chamber 1 to the combustion chamber 2 when the brick is dried after the building, and the furnace body can be dried. And although the hole size of the drying hole 3 depends on the size of the coke oven, it is, for example, approximately 80 mm to 90 mm in length, the inlet 6 side of the carbonization chamber 1 is larger, and the flue hole 7 side of the combustion chamber 2 is larger than this. Make it slightly smaller. This is because the plug brick is inserted from the charging inlet side of the carbonization chamber 1. Moreover, it is preferable that the flue hole side of the combustion chamber 2 has a hole diameter smaller than the diameter dimension of the plug brick so as to serve as a stopper for the plug brick and a gas seal.

  By disposing the drying plug receiving brick 4 on the furnace top 5, the distance from the coal inlet 6 to the drying plug receiving brick 4 is shortened from the conventional installation position, and the drying operation after the building is completed (regular heating is performed). ) It is now possible to easily plug the bricks from the top of the furnace and from the coal inlet 6. The drying hole just below the ascending pipe is plugged from the kiln opening, but this can be easily done from an extruder or a guide car.

  Moreover, the drying hole 3 of the drying plug receiving brick 4 is above the coal charging level 9 of the carbonization chamber 1, and there is no sticking to the plug brick plugged in the drying hole of the coke. There will be no dropout. Furthermore, by installing the drying hole 3 in the top 5 of the carbonization chamber 1 where the wall thickness above the coal charging level 9 is thick, the furnace body strength can be maintained high, and even if there is some damage to the wall, it is fatal. There is an advantage not to be.

  FIG. 3 is a diagram showing a plugging operation for mounting the plug brick on the dry plug receiving brick.

The drying plug is composed of a drying plug receiving brick 4 having a drying hole 3 and a plug brick 11, and the drying plug receiving brick 4 is disposed on a furnace wall that partitions the carbonizing chamber 1 and the combustion chamber 2. The drying hole 3 of the brick 4 communicates the carbonization chamber 1 and the combustion chamber 2. After drying the furnace body, the drying plug receiving brick 4 is plugged using a drying plug 11 from the carbonization chamber 1 side. For example, as shown in FIG. 3A, the shape of the drying plug receiving brick 4 is such that one drying hole 3 having a different hole diameter (d, d ₁ ) is provided, and the plug brick 11 is provided from the carbonization chamber 1 side. The role of the drying hole 3 part on the carbonization chamber 1 side having a diameter (d diameter) slightly larger than the outer diameter of the plug brick 11 so that the plug brick 11 can be inserted, and the stopper 12 that prevents the plug brick 11 from falling off to the combustion chamber 2 side. and drying the hole 3 portion of the combustion chamber 2 side of the smaller diameter than the outer diameter of the distal end portion of the plug bricks 11 in the act as gas seals (d ₁ diameter) are formed. The plug brick 11 is formed with a plugging jig insertion hole 13 into which the distal end portion of the plugging jig can be inserted at the center, and the outer shape of the plug brick 11 is a tapered cylindrical shape that becomes slightly narrower toward the distal end portion. It has become.

  The plugging work of the plug brick 11 located close to the coal inlet 6 is performed by applying mortar to the outer peripheral surface of the plug brick 11, and inserting the L-shaped tip of the rod-shaped plugging jig into the plug brick insertion hole 13. The plugging jig with the plug brick 11 mounted is inserted through the coal inlet 6 of the carbonization chamber 1 and the plug brick 11 is received as a dry plug receptacle as shown in FIG. Insert into the drying hole 3 of the brick 4. Thereafter, the rod-like plugging jig is removed from the plug brick 11 to complete the operation. The plug brick 3 is fixed in the drying hole by mortar, and permanently closes the drying hole that connects the carbonization chamber 1 and the combustion chamber 2. Moreover, although the plugging work from the coal charging inlet 6 was demonstrated, the plugging work of the plug brick 11 in the position close | similar to the riser pipe 10 can also perform the same plugging work. In addition, in this invention, it is not limited to the drying stopper mentioned above, For example, you may be comprised from the drying stopper receptacle brick 4 provided with the drying hole 3 of the tapered cylindrical body shape.

  The dry stopper receiving brick 4 has been operated for many years, and cracks are generated from the drying hole 3 part, which progresses to the entire brick and eventually damages the brick. Better.

  Therefore, in the present invention, it is considered to reduce the number of installation of the drying plug receiving bricks 4, and in place of the drying plug receiving bricks 4, drying communication connecting the coal charging inlet 6 of the carbonization chamber 1 and the flue hole 7 of the combustion chamber 2 is performed. By installing the pipe 14, the dry gas burned in the carbonization chamber 1 can be guided to the combustion chamber 2. For this reason, it has been found that if the drying connecting pipe 14 is provided, the drying stopper receiving brick 4 having the drying hole 3 may not be installed. In particular, the plugging work of the plug brick 11 to the drying hole 3 of the dry plug receiving brick 4 is performed by, for example, mounting the plug brick 11 at the tip of the plugging jig and using the plugging jig from the coal inlet 6 or the kiln. Since the plug brick 11 is plugged into the carbonization chamber 1 and plugged into the drying hole 3 of the dry plug receiving brick 4, the tip of the plugging jig is connected to the drying plug receiver by the wall structure at the top of the carbonization chamber 1. The installation site | part of the drying stopper receiving brick 4 which has the drying hole 3 which cannot reach the drying hole 3 of the brick 4 and is difficult for plugging work arises. In such a part, a drying communication pipe 14 that communicates the carbonization chamber 1 and the combustion chamber 2 is provided instead of the drying hole 3 of the drying plug receiving brick 4 without installing the drying plug receiving brick 4. Is good. For example, a drying plug receiving brick 4 having a drying hole 3 is provided on the furnace wall at a position near the coal charging inlet 6 of the carbonization chamber 1, and the furnace body is transferred from the carbonization chamber 1 to the combustion chamber 2 through the drying hole 3. The combustion exhaust gas for drying is introduced and dried. Also, one end of the drying communication pipe 14 is connected to the flue hole 7 of the combustion chamber 2 at a position where the plugging operation of the drying hole 4 after drying is difficult because the distance from the coal charging inlet 6 of the carbonization chamber 1 is long. The other end is connected to the coal charging inlet 6 of the carbonization chamber 1, and the furnace body drying combustion exhaust gas is introduced from the carbonization chamber 1 to the combustion chamber 2 through the drying communication pipe 14 and dried. .

  FIG. 4A is a view showing the state of the top of the coke oven provided with a drying communication pipe that connects the carbonization chamber and the combustion chamber, and FIG. 4B is a cross-sectional view taken along the line AA. .

  As shown in FIG. 4, for the drying hole installation site where the tip of the plugging jig is difficult to reach the drying hole 3 of the drying plug receiving brick 4, the coal in the carbonizing chamber 1 is replaced with the drying plug receiving brick 4 having the drying hole 3. A drying communication pipe 14 is provided at the furnace top 17 so as to connect the charging port 6 and the flue hole 7 of the combustion chamber 2. By providing the drying communication pipe 14, it is not necessary to install the drying stopper receiving brick 4 having the drying hole 3. The drying communication tube 14 is a tube having an inverted U-shaped cross section, and is preferably installed at a position as low as possible in the top 17 of the furnace. If it is in a low position, it does not interfere with walking on the furnace, and the weight of the drying connecting pipe 14 can be reduced. In principle, the drying communication pipe 14 connects the flue hole 7 of the combustion chamber 2 where the drying plug receiving brick 4 having the drying hole 3 is not provided and the coal inlet 6 of the carbonization chamber 1. This is because even if it is installed in the flue hole 7 of the combustion chamber 2 provided with the drying stopper receiving brick 4 having the drying hole 3 and the coal charging inlet 6 of the carbonization chamber 1, the effect cannot be exhibited so much, which is not preferable.

  This drying connecting pipe 14 is installed until the drying work after the furnace building is finished and regular heating is completed, so the material is made of steel, especially stainless steel, and a heat insulating material is wound around the entire circumference to prevent heat dissipation, burns, etc. It is preferable not to have it. In addition, if it becomes regular heating, this dry communication pipe 14 will be removed.

  FIG. 5 is a diagram showing the structure of the attachment portion of the drying communication pipe 14, (a) is the attachment structure to the coal charging inlet 6 of the carbonization chamber 1, and (b) is the attachment structure to the flue hole of the combustion chamber 2. FIG.

  The dry communication tube 14 is easy to attach and is easy to remove after becoming regular heating. As shown in FIG. 5 (a), the coal charging inlet 6 of the carbonization chamber 1 is provided with a temporary inlet lid 15 having a hole into which one end of the drying communication pipe 14 can be inserted in the central portion. One end of the drying communication pipe 14 is fitted, and the carbonization chamber 1 and the drying communication pipe 14 are connected. On the other hand, as shown in FIG. 5 (b), the other end of the drying communication pipe 14 is fitted into the flue hole 7 of the combustion chamber 2 provided with a guide 16 for ensuring sealing performance, in the flue hole 7 of the combustion chamber 2. The combustion chamber 2 and the drying communication pipe 14 are connected. It is preferable that the dimension of the dry communication pipe 14 is as small as possible so that the gap with the flue hole 7 of the combustion chamber 2 is as small as possible in order to ensure sealing performance.

  Hereinafter, the present invention will be described based on examples.

  After the coke oven is built, the furnace body is dried by burning fuel such as COG or light oil in the carbonization chamber, leading the combustion exhaust gas to the combustion chamber, bellows, heat storage chamber, horizontal flue, and via the flue This is done by releasing air from the chimney.

  How to lead the combustion exhaust gas for drying the furnace body from the carbonization chamber 1 to the combustion chamber 2 is important for drying the furnace body after the construction.

  In this embodiment, as shown in FIG. 4, a drying hole 3 connecting the carbonization chamber 1 and the combustion chamber 2 is installed at the top of the furnace above the coal charging level, and plugging of the drying hole 3 is difficult. The combustion for drying the furnace body from the carbonization chamber 1 to the combustion chamber 2 is performed by installing the drying communication pipe 14 that connects the coal charging inlet 6 and the flue hole 7 without providing the drying hole 3 at the position where the drying hole that becomes a part is provided. The exhaust gas was guided. Specifically, a drying plug receiving brick 4 having a drying hole 3 is provided on the furnace wall at a position close to the coal charging inlet 6 of the carbonization chamber 1, and the combustion chamber 2 is connected to the combustion chamber 2 through the drying hole 3. The furnace body drying combustion exhaust gas was introduced and dried. Also, one end of the drying communication pipe 14 is connected to the flue hole 7 of the combustion chamber 2 at a position where the plugging operation of the drying hole 4 after drying is difficult because the distance from the coal charging inlet 6 of the carbonization chamber 1 is long. Then, the other end was connected to the coal inlet 6 of the carbonization chamber 1, and the combustion exhaust gas for drying the furnace body was introduced from the carbonization chamber 1 to the combustion chamber 2 through the drying communication pipe 14 and dried.

  Regarding the installation of the drying plug receiving brick 4 having the drying hole 3 connecting the carbonization chamber 1 and the combustion chamber 2 at the furnace top 5 above the coal charging level, the drying hole 3 is directly below the coal inlet 6 and the riser pipe 7. It was provided at the ceiling 8 portion of the furnace carbonization chamber 1. Since the ceiling 8 portion of the furnace top 5 has a thick brick thickness, even if the drying hole 3 is provided, the decrease in the furnace strength is small. One of the drying holes 3 is connected to the coal inlet 6 of the carbonization chamber 1 and the other is connected to the flue hole 7 of the combustion chamber 2. The hole size of the drying hole 3 of the drying plug receiving brick 4 is Ф80 to Ф90 mm, the coal inlet 6 side of the carbonization chamber 1 is as large as Ф90 mm, and the flue hole 3 side of the combustion chamber 2 is slightly smaller than Ф85 mm. . This is because the plug brick 11 is put into the drying hole 3 on the charging inlet 6 side of the carbonization chamber 1. Moreover, since the flue hole 7 side becomes a stopper of plug brick, the dry hole size is set to 80 mm which is smaller than the dimension of the tip of the plug brick 11 (栓 85 mm).

  The drying communication pipe 14 connecting the flue hole 7 of the combustion chamber 2 near the furnace wall where the drying plug receiving brick 4 having the drying hole 3 is not provided and the coal inlet 6 of the carbonization chamber 1 is as low as possible on the furnace. Install in position. If it is in a low position, it does not interfere with walking on the furnace, and the weight of the drying connecting pipe 14 can be reduced.

  As described above, after the drying plug receiving brick 4 having the drying hole 3 and the drying communication pipe 14 were installed, a combustion burner was inserted into the lower portion of the carbonizing chamber 1 to burn COG. The combustion exhaust gas becomes combustion exhaust gas at a temperature of about 1000 to 1400 ° C., rises in the carbonization chamber 1, flows into the combustion chamber 2 through the drying hole 3 or the drying connection pipe 14 of the drying plug receiving brick 4, and is a bellows or a heat storage chamber. , Led to a horizontal flue, and was able to dissipate the atmosphere from the chimney via the flue.

  When the drying operation is completed and regular heating is achieved, the plugging operation of the drying hole is performed on the furnace and the kiln opening, and the drying connecting pipe 14 is removed.

  In addition, although the said Example demonstrated the example which installed both the drying hole 3 and the drying communication pipe 14 of the drying stopper receptacle brick 4, it can implement only with the drying hole 3 or only the drying communication pipe 14, It is preferable to carry out in combination.

It is a fragmentary sectional view of the coking oven carbonization chamber and combustion chamber in the furnace length direction (direction in which coke is pushed out by a pusher). It is a fragmentary sectional view of the carbonization chamber and combustion chamber of the length direction of a coke oven. It is a figure which shows the plugging operation | work which attaches a plug brick to a dry plug receiving brick, (a) is a figure before plugging work, (b) is a figure which shows after completion | finish of plugging work. (A) is a figure which shows the state of the furnace top part of the coke oven which installed the dry communication pipe which connects a carbonization chamber and a combustion chamber, (b) is sectional drawing in the BB line. (A) And (b) is a figure which shows the structure of the attachment part of a dry communication pipe | tube, (a) is an attachment structure to a coal loading inlet, (b) is a figure which shows the attachment structure to a flue hole.

Explanation of symbols

1 Coking chamber 2 Combustion chamber 3 Drying hole 4 Drying plug receiving brick 5 Furnace top 6 Coal inlet 7 Flue hole 8 Ceiling 9 Coal charging level 10 Rising pipe 11 Plug brick 12 Stopper 13 Jig insertion hole 14 Drying connection pipe 15 Temporary charging Lid 16 guide 17 top

Claims (4)

There is a heat storage chamber at the bottom of the furnace body, and in the furnace body drying method at the time of firing in the furnace equipment of a coke oven having a structure in which combustion chambers and carbonization chambers are alternately arranged at the top, the coal charging of the carbonization chamber A drying plug receiving brick having a drying hole communicating with the carbonization chamber and the combustion chamber is disposed on the furnace wall at the top of the furnace above the level , and combustion exhaust gas generated by burning fuel in the carbonization chamber is carbonized through the drying hole. The furnace body is led from the chamber to the combustion chamber and the flue gas is ventilated throughout the furnace to dry the furnace body. After the furnace body is dried, the plug brick is inserted into the drying hole of the dry plug receiving brick from the coal inlet and plugged. A furnace body drying method at the time of firing in a furnace body equipment of a coke oven characterized by the above.
  The furnace wall at a position close to the coal charging inlet of the carbonization chamber is provided with a drying stopper receiving brick having a drying hole, and the flue hole of the combustion chamber at a position far from the coal charging inlet of the carbonization chamber is provided. Then, one end of the drying communication pipe is connected, the other end of the drying communication pipe is connected to the coal inlet of the carbonization chamber, and the combustion exhaust gas generated by burning the fuel in the carbonization chamber is carbonized through the drying hole and the drying communication tube. The furnace body is led from the chamber to the combustion chamber and the flue gas is ventilated throughout the furnace to dry the furnace body. After the furnace body is dried, the plug brick is inserted into the drying hole of the dry plug receiving brick from the coal inlet and plugged. In addition, the drying connecting pipe is removed, and the furnace body drying method at the time of firing in the furnace body equipment of the coke oven according to claim 1.   The drying hole of the drying plug receiving brick has a drying hole portion larger in diameter than the outer diameter of the plug brick and an outer diameter of the tip of the plug brick so as to serve as a stopper that prevents the plug brick from falling to the combustion chamber side. The furnace body drying method at the time of ignition in the furnace body equipment of the coke oven according to claim 1 or 2, wherein the drying hole portion has a small diameter.   4. The method of drying a furnace body at the time of firing in a furnace body equipment of a coke oven according to claim 2, wherein the drying connecting pipe is structured to be fitted into a flew hole and a temporary entrance lid so as to be easily removed.

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