JP3421280B2 - Heat insulation method in coke oven brick repair - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brick transshipment repair of a combustion chamber of a Karlstil type coke oven, in which hot air from the non-repair section is shut off and the temperature of the non-repair section is properly maintained and the brick is dismantled. Related to the method of heat insulation in the furnace when repairing bricks in the coke oven for the purpose of preventing falling of brick waste.

[0002]

2. Description of the Related Art Generally, a coke oven is provided with a heat storage chamber 9 at its lower portion and a carbonization chamber 2 and a combustion chamber 4 at its upper portion, as shown in FIG.
Are alternately arranged to form a furnace group, and the coal charged in the carbonization chamber 2 from the coal car 51 running on the furnace receives heat from the combustion chambers 4 on both sides and is carbonized. After the door 8 of the carbonization chamber 2 is opened, the dry-distilled coke is pushed out by the extruder 52, and is transported by the fire extinguisher 53 to the red hot coke extinguishing equipment (not shown) via the guide wheel 54.

The heat storage chamber 9 and the combustion chamber 4 are constructed of bricks, and inside thereof are formed passages of fuel gas and air, or combustion exhaust gas generated as a result of mixing and burning of fuel gas and air. In particular, the combustion chamber 4 has a structure in which bricks are combined to form the above passage, and the outer wall of the combustion chamber is the furnace wall brick of the adjacent carbonization chamber 2. The carbonization chamber 2 is a space surrounded by the outer walls of the two adjacent combustion chambers 4 and the door 8 on the extruder 52 side and the guide wheel 54 side.

In order to make the coal in the carbonization chamber 2 into a homogeneous coke, it is necessary to make the temperature in the carbonization chamber 2 as uniform as possible. For that purpose, the fuel gas, air, and the like in the heat storage chamber 9 and the combustion chamber 4 are required. Alternatively, there are various types of flue gas passage structures. FIG. 7 shows a perspective sectional view of a combustion chamber of a Karlstil type coke oven as an example of a two-division type coke oven having a horizontal flame passage in the upper part of the combustion chamber. In the two-division type furnace, the combustion chamber 4 and the heat storage chamber 9 are divided into an extruder installation side (machine side: hereinafter referred to as M / S) and a guide vehicle installation side (coke side: hereinafter referred to as C / S). And is connected by an upper horizontal flame passage 14 above the combustion chamber 4. M /
The direction connecting the S and C / S is called the furnace length direction, and the direction in which the combustion chamber and the carbonization chamber are lined up is called the furnace width direction.

The fuel gas 61 and the combustion air 62 supplied from below the C / S heat storage chamber 9 flow through the passages in the heat storage chamber 9 to be preheated, and then flow into the combustion chamber 4. In the combustion chamber 4, openings (called gas ports and air ports, respectively) are formed in multiple stages from the fuel gas passage and the air passage toward the flame passage called the flue 11, and the fuel gas 61 and the air 62 are diverted inside the flue 11. When mixed, combustion of fuel gas occurs. Both the fuel gas passage and the air passage in this combustion chamber are called a multi-stage burner duct 12. The combustion exhaust gas generated in the flue 11 joins in the horizontal flame passage 14 above the flue 11 and flows in the furnace length direction, and flows backward from the upper horizontal flame passage 14 of the M / S combustion chamber into the flue 11.
The gas flows back from the gas port and the air port to the multi-stage burner duct 12, passes through the heat storage chamber 9, and is exhausted from the chimney. 20
After this kind of burning for ~ 30 minutes
Fuel gas 61 and air 62 are supplied from the side of / S to C /
Exhaust gas flows to S and is exhausted. By alternately repeating combustion in this way, the temperatures of C / S and M / S in the combustion chamber are made uniform.

As described above, in the coke oven, the temperature of the entire oven is controlled to be as uniform as possible, but when discharging the generated coke out of the oven, the doors 8 on both sides are opened as described above. In order to perform the operation of pushing out the coke with the extruder, the outside air flows in, and the furnace wall near the door receives a large temperature history of heating and cooling. Also,
Wear on the surface of the furnace wall of the carbonization chamber due to extruded coke is also unavoidable. Therefore, damage to the furnace wall near the door is often manifested especially after long-term use of the coke oven, and when the damage is significant, hot transshipment of bricks constituting the furnace wall is performed.

As described above, since the furnace wall of the carbonization chamber is the outer wall of the combustion chamber itself, hot-loading the furnace wall of the carbonization chamber means reloading the combustion chamber itself. Therefore, in the case of such furnace wall transshipment repair near the door of the carbonization chamber, the combustion chamber corresponding to the furnace wall to be transshipped is dismantled. For this reason, in transshipment repair, the carbonization chambers on both sides of the combustion chamber are emptied, the combustion of the combustion chamber corresponding to the corresponding furnace wall and the two adjacent combustion chambers are stopped, and the non-repair part of the corresponding combustion chamber is stopped. In order to prevent the temperature drop of the bricks and the bricks of the two adjacent combustion chambers, a heat insulating material is applied from the boundary between the transshipment section and the non-repair section of the corresponding combustion chambers to the furnace openings of the two combustion chambers. It is usually enclosed. By surrounding the transshipment section with the heat insulating material in this manner, it is possible to promote the cooling of the bricks in the transshipment section at the same time and improve the working environment of the transshipment work place.

However, it has a horizontal flame passage at the upper part of the combustion chamber.
In the split-type coke oven, it is not possible to completely block the hot air only by surrounding the wall surfaces of the adjoining carbonization chambers with the heat insulating material. That is, since the upper horizontal flame passage communicates with the furnace length direction of the combustion chamber, hot air blows out from the flue of the non-repair section through the horizontal flame passage. In addition, since it also communicates with the heat storage chamber below the transshipment section through the above-mentioned multi-stage burner duct and the gas port at the bottom of the flue, depending on the progress of the brick dismantling, from the gas port or air port of the multi-stage burner duct or the gas port at the flue bottom. Hot air was blown out, and there was no heat insulation method to prevent this effectively.

Further, it is necessary to cure the above-mentioned opening so as not to drop the brick waste generated at the time of demolishing the brick from the place communicating with the heat storage chamber.

[0010]

In the case of the Karlstil type coke oven, since the furnace horizontal direction of the combustion chamber is connected by the upper horizontal flame passage and the multi-stage burner hole, when the bricks of the combustion chamber are transferred, these It is necessary to block the part and shut off the hot air from the non-transshipment section. In addition, during brick removal in the transshipment section, while preventing falling of brick scraps inside the multi-stage burner duct, with the progress of demolition, a heat insulation measure was carefully applied to the brick surface of the multi-stage burner duct that becomes the transshipment boundary. There is also a need to go. From the above, it has been said that it is difficult to transship bricks in a Karlstil type coke oven, and no specific heat insulation method or brick waste fall prevention method has been proposed so far. It is an object of the present invention to solve the above problems and provide a heat insulating method for repairing a combustion chamber of a coke oven.

[0011]

DISCLOSURE OF THE INVENTION The present invention relates to a partial hot transshipment repair of a brick of a combustion chamber of a two-division type coke oven having a horizontal flame passage at the upper part of the combustion chamber, and an unrepaired portion adjacent to the transshipment portion. No. 2 or more of the flue is closed with a heat insulating material, and the horizontal flame passage cross section is closed, and the heat insulation method in the furnace for repairing a coke oven brick is characterized. As a result, the flow of hot air in the adjacent flue can be suppressed, and the heat radiation from the transshipment boundary can be suppressed.

Furthermore, the present invention is a heat insulating method for repairing a brick of a coke oven, characterized in that a gas port or an air port opened in a boundary wall of the flue adjacent to the transshipment portion is closed with a heat insulating material. Thereby, blowout of hot air from the gas port and the air port can be suppressed, and brick waste can be prevented from dropping into the multi-stage burner duct during the brick dismantling of the transshipment section.

INDUSTRIAL APPLICABILITY The present invention is applied to the brick transshipment of a combustion chamber of a two-division type coke oven having a horizontal flame passage in the upper part of the combustion chamber, such as a Karlstil type coke oven. Prior to the full-scale dismantling of the transshipment section brick, a part of the furnace wall brick is dismantled, and each flue bottom gas port of the transshipment section and the gas port or air port to be the transshipment boundary section are closed, and subsequently, When the bricks of the upper horizontal flame path are sequentially dismantled from the kiln opening, the insulation is pushed into the upper horizontal flame path, and when it reaches the boundary between the upper horizontal flame path to be dismantled and the remaining upper horizontal flame path. Further, two or more flue upper end holes are closed with a heat insulating material and the horizontal flame passage section is closed.

Further, according to the present invention, the heat insulating material is installed so as to cover the outer wall surface of the combustion chamber corresponding to the length of 2 to 3 flues of the non-repair portion adjacent to the transshipment portion,
An in-furnace thermal insulation method at the time of repairing a coke oven brick, characterized in that the heat insulating material surrounds a furnace length direction end portion to a furnace opening portion of a combustion furnace adjacent to a combustion furnace to be repaired. The non-repaired portion of the non-repaired part adjacent to the transshipment part is fitted with heat insulating material so as to cover the outer wall of the combustion chamber corresponding to the length of 2 to 3 flues. In addition to being able to block heat, as described above, the flue upper end hole for 2 to 3 flues can be blocked by a heat insulating material to suppress the draft in the flue, so the temperature of this part can be kept relatively low. The temperature of the boundary wall of the transshipment part can be kept at a temperature that does not hinder the brick repair. Also, in order to surround the heat insulating material from the end in the furnace length direction to the furnace opening of the combustion furnace next to the combustion furnace to be repaired, the end of the heat insulating material in the furnace length direction as seen from the transshipment section In this section, a heat insulator is installed over the entire width of the carbonization chamber in the furnace width direction, and if a heat insulator is installed along the outer wall of the adjacent combustion furnace up to the furnace mouth, it is possible to transship bricks during transshipment work. This is preferable because it allows a wide working space around the part.

In addition, the present invention is characterized in that a multi-stage burner duct, which is a passage for combustion gas and air that appears when the transshipment part is dismantled, is provided with a dropping lid from above so that the coke oven bricks can be heat-insulated. Is. Since the multi-stage burner duct communicates with the heat storage chamber below the combustion chamber, if brick scraps fall due to dismantling, the flow of gas and air is obstructed. Therefore, at the time of dismantling, it is necessary to carry out curing to avoid it, but at the start of dismantling, the multi-stage burner duct does not appear on the surface, so effective curing cannot be performed.
Therefore, when the upper part of the multi-stage burner duct appears after the dismantling is started, brick drop can be prevented by installing a drop lid on the multi-stage burner duct. This drop lid has a supporting part on the top surface of the dismantled brick, and if the supporting member is hung from the supporting part with a rod or a pipe having a length of 2 to several bricks, It is possible to prevent brick waste from falling below the multi-stage burner duct during the dismantling of the length of the.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is to dismantle a part of a furnace wall brick prior to full-scale dismantling of a brick for a transshipment section at the time of brick transshipment of a Karlstil-type coke oven, and to dispose each flue in the transshipment section. Closing the bottom gas port, then closing the gas ports or air ports that are provided in multiple stages on the flue bulkhead at the transshipment boundary, then successively dismantling the bricks of the upper horizontal flame passage from the kiln opening. , 2 in the upper horizontal flame path adjacent to the transshipment section when the boundary with the non-repair section wall is reached
The above-mentioned flue upper end hole is closed, the horizontal flame passage cross section is closed, and hot air from the non-repair part is shut off, so that safe dismantling work can be performed.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 is a partial plan sectional view showing the structure of the coke oven 1 to be repaired. The carbonization chambers 2 and the combustion chambers 4 are alternately adjacent to each other and are arranged in parallel to form a furnace group. Now, as shown in FIG. 4, the wall 3 of one of the combustion chambers 4 is to be repaired, and only the part on the kiln mouth side from the transshipment boundary 7 is transshipped. Two adjacent carbonization chambers 2 are used as empty furnaces, and the outer wall surface of the combustion chamber 4 on the carbonization chamber 2 side from the boundary 7 of the transshipment portion of the wall body 3 for transshipment to the 2 to 3 flues, and the inner part of the carbonization chamber 2 The cross section of the carbonization chamber in the furnace width direction and the outer wall surface of the adjacent combustion chamber are covered with the heat insulating material 5. The heat insulating material 5 is tightened with the tightening metal fitting 6 to be in close contact with the wall, the heat flow is shut off, and the brick in the transshipment section is cooled. The combustion chamber 4 is composed of a fuel gas or air passage 12 and a flue 11 through which hot gas flows. At the bottom of the flue 11 is a bottom gas port 13. The bottom gas port 13 is covered and cured so that brick waste does not enter.

FIG. 1 (a) is a front view of a closed horizontal flame passage 14, FIG. 1 (b) is a side sectional view thereof, and FIG. 2 (a) is a shield plate for the horizontal flame passage 14 such as a shoji or screen. 23 is a front view showing a state in which 23 is erected, and FIG. 2 (b) is a side view thereof.

In FIG. 1, a heat insulating board or blanket 21 is laid in the horizontal direction on the upper part of two or more flues 11 in the non-repair part adjacent to the repair part, and the edges between these flue 11 and the horizontal flame passage 14 are cut. After closing the slide bricks 15 arranged on the upper part of each flue 11, this operation makes the edge cutting more reliable. The heat insulating blanket 22 is filled in the horizontal flame passage 14 of the non-repair portion at the boundary between the repair portion and the non-repair portion to close the horizontal flame passage 14. On the surface of the insulation blanket 22 on the repair side, as shown in FIG.
A shielding plate 23 such as a shoji screen is set up and a heat insulating material 24 is provided around it.
The heat insulation of the horizontal flame passage 14 will be more complete if the means for filling is also used.

Fuel or air passage 12 and flue 11
A gas port or an air port 31 is opened in multiple stages in the partition wall. FIG. 3A is an explanatory view showing a state in which the port 31 opened to the partition wall 30 is closed by a heat insulating material 32, and FIG. 3B is a perspective view of the heat insulating material 32. Immediately before or during brick dismantling, the gas port and the air port 31 opening in the partition wall 30 of the flue to be repaired and the unrepaired flue are closed with a heat insulating material 32, and hot air between the flue of the unrepaired part and the dismantled part is closed. Completely shut off the flow of. In the figure, 33 and 34 are reinforcing plates that reinforce the heat insulating material 32.

FIG. 5 shows a state in which the bricks of the combustion chamber are successively dismantled from the upper part in the kiln direction. The multi-stage burner duct 12, which is a passage for the fuel gas or the air, appears while the partition wall 30 forming the brick of the combustion chamber is dismantled from the upper portion in the direction of the kiln.
The drop lid 40 is dropped from the upper portion of the multi-stage burner duct 12 into the multi-stage burner duct 12 to close the opening. The drop lid 40 may be such that the heat insulating lid 43 and the collar 41 are connected by a rod 42 as shown in FIGS. As the material of the drop lid, any material that can withstand high temperatures such as steel or refractory can be used. Also, different members may be made of different materials. If the heat insulating lid 43 has a size that substantially covers the inside of the multi-stage burner duct, it is possible to prevent the brick scraps from falling downward when they fall during dismantling. By making the collar 41 slightly larger than the cross section of the multi-stage burner duct, it is possible to prevent the drop lid from falling. The length of the rod 42 may be about 2 to several bricks.

As shown in FIGS. 5 and 6, brick waste generated during the dismantling of the partition wall 30 is not blocked by the brim 41 of the dropping lid 40 or the heat insulating lid 43 and does not fall below the multi-stage burner duct. At this time, rod 42 is brick 2
Since it has a length of several steps, it is possible to prevent brick waste from falling inside the multi-stage burner duct surrounded by the partition walls even when the partition wall 30 in which the drop lid is installed is disassembled. Further, since the dropping lid can block the high temperature gas from which high temperature is ejected, the safety of the disassembling work can be maintained.

[0023]

EFFECTS OF THE INVENTION According to the present invention, in the brick transshipment of the Karlstil type coke oven, the boundary between the repaired portion and the non-repaired portion is properly insulated so that the heat flow is blocked, so that the safe dismantling work can be performed. became. Further, it was possible to prevent cooling of the furnace wall surface, and to prevent cracks and collapse of the burner duct brick.

The present invention can be easily applied to a coke oven of a type other than the Karlstill type.

[Brief description of drawings]

FIG. 1 is a front view showing a closed horizontal flame passage, and FIG.
It is a side view.

FIG. 2A is a front view showing a horizontal flame road shield plate; FIG.
It is a side view.

FIG. 3 is an explanatory view of blockage of a port.

FIG. 4 is a partial plan sectional view showing the structure of a coke oven.

FIG. 5 is an explanatory diagram showing a usage state of a drop lid when dismantling a brick.

6 is a view taken along the line AA of FIG.

FIG. 7 is an explanatory diagram showing a facility arrangement of a general coke oven.

FIG. 8 is an explanatory diagram showing an example of gas flows in a heat storage chamber and a combustion chamber.

[Explanation of symbols]

1 coke oven 2 carbonization chamber 3 walls 4 Combustion chamber 5 insulation 6 Tightening bracket 7 Transshipment section boundary 8 doors 9 heat storage room 11 flues 12 Fuel or air passage (multi-stage burner duct) 13 Bottom gas port 14 Horizontal flame path 15 slide bricks 21 blanket 22 Thermal insulation blanket 23 Shield 24 Insulation 25 fixing bracket 30 bulkheads 31 gas port or air port 32 insulation 33, 34 Reinforcing plate 40 Dropper 41 brim 42 rod 43 Insulation lid 51 coal car 52 Extruder 53 fire extinguisher 54 guide car 61 Fuel gas 62 air

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuro Uchida 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Chiba Works (72) Inventor Shinya Kamide 4-1-117 Tsukiji, Chuo-ku, Tokyo Stock Company Otto (56) Reference JP 7-247481 (JP, A) JP 57-98584 (JP, A) Actual development Sho 59-83947 (JP, U) (58) Fields investigated (Int .Cl. ⁷ , DB name) C10B 29/06 F27D 1/16

Claims (4)

(57) [Claims] 1. In partial hot transshipment repair of a combustion chamber brick of a two-division type coke oven having a horizontal flame passage in the upper part of the combustion chamber, two or more flue upper ends of a non-repaired portion adjacent to the transshipment portion are insulated. A method of heat insulation in a furnace for repairing a brick of a coke oven, which is characterized by blocking the cross section of the horizontal flame passage while blocking with a material. 2. The heat insulation in the furnace for repairing a coke oven brick according to claim 1, wherein the gas port and the air port opening in the boundary wall of the flue adjacent to the transshipment portion are closed with a heat insulating material. Method. 3. The heat insulating material is installed so as to cover the outer wall surface of the combustion chamber corresponding to the length of 2 to 3 flues of the non-repair portion adjacent to the transshipment portion, and the end of the heat insulating material in the furnace length direction. 3. The method for insulating heat in a coke oven brick during repair according to claim 1 or 2, wherein a heat insulating material surrounds a furnace portion of a combustion furnace adjacent to a combustion furnace to be repaired. 4. The coke oven brick repair according to any one of claims 1 to 3, characterized in that a drop cover is placed from above on a passage for combustion gas and air that appears when the transshipment portion is dismantled. Insulation method in the furnace.