JP2001026781A - Method for heat insulating inside of furnace in repairing coke oven brick - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a heat flow by properly insulating the boundary of a part to be repaired and a part to be non-repaired in reloading bricks of a Carl still type coke oven. SOLUTION: This method for thermally insulating the inside of a coke oven in repairing coke oven bricks is to cover up the upper ends of two or more of flues 11 adjacent to a reloading part with a heat insulating material 21, close the horizontal cross-section 14 of a fire path with a heat insulating material 22 and close a gas port or air port 31 opening at the boundary wall of the flue adjacent to the reloading part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing bricks in a combustion chamber of a Karl still type coke oven, in which hot air from a non-repair portion is cut off, the temperature of the non-repair portion is maintained properly, and the brick is dismantled. The present invention relates to an in-furnace heat insulation method at the time of coke oven brick repair for the purpose of preventing fall of brick debris.

[0002]

2. Description of the Related Art Generally, a coke oven has a heat storage chamber 9 at a lower portion as shown in FIG.
Are alternately arranged to form a furnace group. Coal charged into the coking chamber 2 from a coal-equipped truck 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 coke that has been carbonized is extruded by the extruder 52 and transported to a red hot coke extinguishing facility (not shown) by a fire extinguishing car 53 via a guide car 54.

[0005] The heat storage chamber 9 and the combustion chamber 4 are constructed of bricks, and a passage for fuel gas and air or a combustion exhaust gas generated as a result of mixing and burning them is formed inside. In particular, the combustion chamber 4 has a structure in which the above-described passage is formed by combining bricks, and the outer wall of the combustion chamber is a 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 coking chamber 2 uniform coke, it is necessary to make the temperature in the coking chamber 2 as uniform as possible. For that purpose, the fuel gas, air, Alternatively, there are various types of structures of the passage of the combustion exhaust gas. FIG. 7 is a perspective sectional view of a combustion chamber of a Carlstil type coke oven as an example of a two-piece coke oven having a horizontal flame passage at the upper part of the combustion chamber. In the two-piece 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 wheel installation side (coke side: hereinafter referred to as C / S). And are connected by an upper horizontal flame path 14 above the combustion chamber 4. M /
A direction connecting S and C / S is referred to as a furnace length direction, and a direction in which the combustion chamber and the carbonization chamber are arranged is referred to as a furnace width direction.

The fuel gas 61 and the combustion air 62 supplied from below the C / S heat storage chamber 9 respectively flow through the passages in the heat storage chamber 9 and then flow into the combustion chamber 4 after being preheated. In the combustion chamber 4, openings (referred to as gas ports and air ports, respectively) are formed in multiple stages from the fuel gas passage and the air passage toward a flame passage called Flue 11, and the fuel gas 61 and the air 62 flow in the Flue 11. Mixing causes combustion of the fuel gas. Both the fuel gas passage and the air passage in the combustion chamber are referred to as a multi-stage burner duct 12. The flue gas generated in the flue 11 merges in the horizontal flame passage 14 above the flue 11 and flows in the furnace length direction, flows backward into the flue 11 from the upper horizontal flame passage 14 in the M / S combustion chamber,
The gas flows backward 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 such a combustion for ~ 30 minutes, M
/ S side supplies the fuel gas 61 and the air 62, and C /
Exhaust gas flows to S and is exhausted. Thus, by repeating the combustion alternately, the temperatures of C / S and M / S in the combustion chamber are made uniform.

As described above, the coke oven is controlled so that the temperature of the entire oven becomes as uniform as possible. However, when discharging the generated coke outside the oven, the doors 8 on both sides are opened as described above. In order to perform the operation of extruding coke with an extruder, the outside air flows in, and the furnace wall near the door receives a large temperature history of heating and cooling. Also,
The furnace wall of the coking chamber cannot avoid surface wear due to extruded coke. For this reason, the damage to the furnace wall, especially near the door, often becomes obvious due to the long-term use of the coke oven, and when the damage is remarkable, the bricks composing the furnace wall are hot-transferred.

As described above, since the furnace wall of the coking chamber is the outer wall of the combustion chamber itself, hot-transferring the furnace wall of the coking chamber means transferring the combustion chamber itself. Therefore, in the case of such a furnace wall transfer repair near the door of the carbonization chamber, the combustion chamber corresponding to the furnace wall to be transferred is dismantled. For this reason, in the transshipment repair, the carbonization chamber on both sides of the combustion chamber is emptied, the combustion in the combustion chamber corresponding to the corresponding furnace wall and the combustion in the two adjacent combustion chambers are stopped, and the non-repair portion of the corresponding combustion chamber is stopped. In order to prevent the temperature of the bricks and the bricks of the two adjacent combustion chambers from dropping, heat insulating material is applied from the boundary between the transshipment section and the non-repaired section of the corresponding combustion chamber from the furnace port of the two combustion chambers. It is usual to enclose. By surrounding the transfer part with the heat insulating material in this way, it is possible to simultaneously promote the cooling of the bricks in the transfer part and improve the working environment of the transfer work place.

[0008] However, there is a horizontal flame passage 2 above the combustion chamber.
In a split type coke oven, hot air cannot be completely shut off only by surrounding the wall surfaces of the carbonization chambers on both sides with a heat insulating material. That is, since the upper horizontal flame passage communicates with the combustion chamber in the furnace length direction, hot air blows out from the non-repaired portion of the flue through the horizontal flame passage. In addition, since it communicates with the heat storage chamber below the transfer section through the multi-stage burner duct and the gas port at the bottom of the flue, the gas port and the air port of the multi-stage burner duct or the gas port at the bottom of the flue as the brick is dismantled. And there was no heat insulation method to effectively prevent this.

In addition, it is necessary to cure the above-mentioned opening so that brick debris generated when the bricks are dismantled does not drop from the place communicating with the heat storage chamber.

[0010]

In the case of a Carlstil type coke oven, since the furnace length direction of the combustion chamber is connected by the upper horizontal flame passage and the multi-stage burner holes, these are used when the combustion chamber bricks are transshipped. It is necessary to close the section and block hot air from the non-transshipment section. In addition, during the dismantling of the bricks in the transfer section, while preventing the debris from falling into the inside of the multi-stage burner duct, as the demolition progresses, the surface of the multi-stage burner duct brick which is the transfer boundary part is neatly insulated. You also need to go. From the above, it is considered difficult to transfer bricks in a Carl Still coke oven, and no concrete heat insulation method or brick dust fall prevention method has been proposed so far. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a heat insulation method for repairing a coke oven combustion chamber.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a partial hot transfer repair of a combustion chamber brick of a two-piece coke oven having a horizontal flame passage at the upper part of the combustion chamber, and a non-repair part adjacent to the transfer part. And clogging the cross section of the horizontal flame passage with the heat insulating material at the upper ends of two or more of the flue. Thereby, the flow of the hot air in the adjacent flew can be suppressed, and the heat radiation from the transfer boundary can be suppressed.

Further, the present invention is a heat insulation method for repairing coke oven bricks, characterized in that a gas port or an air port opened on a boundary wall of flew adjacent to a transshipment portion is closed with a heat insulating material. Thus, it is possible to suppress the blowing of hot air from the gas port and the air port, and to prevent the debris from falling into the multi-stage burner duct during the dismantling of the bricks in the transfer section.

The present invention is applied to the transfer of bricks in a combustion chamber of a two-piece coke oven having a horizontal flame passage at the upper part of the combustion chamber, for example, a Carlstil type coke oven. Prior to the full-scale demolition of the transshipment section bricks, a part of the furnace wall bricks is dismantled, and the gas port or air port serving as a transshipment boundary at each flue bottom gas port of the transshipment section, While dismantling the bricks of the upper horizontal flame channel sequentially from the kiln mouth, push the insulation into the depth of the upper horizontal flame channel and reach the boundary between the upper horizontal flame channel to be dismantled and the remaining upper horizontal flame channel. Further, two or more flue upper end holes are closed with a heat insulating material, and a horizontal flame passage section is closed.

Further, according to the present invention, a heat insulating material is provided so as to cover the outer wall surface of the combustion chamber corresponding to the length of two to three flues of the non-repair part adjacent to the transshipment part,
A method of heat insulation in a coke oven brick repairing method, wherein a heat insulating material is surrounded by a heat insulating material from an end of the heat insulating material in a furnace length direction to a furnace opening of a combustion furnace adjacent to a combustion furnace to be repaired. By installing heat insulating material so as to cover the outer wall surface of the combustion chamber corresponding to the length of two to three flues of the non-repair part adjacent to the transshipment part, the non-repair part enters the two or three flues from the outer wall surface. In addition to blocking heat, the draft inside the flue can be suppressed by closing the flue upper end hole for two or three flue with the heat insulating material as described above. And the temperature of the boundary wall of the transshipment portion can be maintained at a temperature that does not hinder the repair of the brick. In order to enclose the heat insulating material from the furnace length direction end to the furnace mouth of the combustion furnace next to the combustion furnace to be repaired with the heat insulating material, the heat insulating material in the furnace length direction rear end as viewed from the transfer unit. In the section, if a heat insulator is installed over the entire width of the furnace in the furnace width direction of the coking chamber and heat insulating material is installed up to the furnace mouth along the outer wall of the adjacent combustion furnace, brick transfer in the transfer operation This is preferable because the work area around the part can be widened.

In addition, the present invention provides a method of insulating a coke oven brick during repair of a brick in a multi-stage burner duct, which is a passage for combustion gas and air that appears as a result of dismantling of a transshipment portion. It is. Since the multi-stage burner duct communicates with the heat storage chamber below the combustion chamber, if the brick debris falls due to dismantling, the flow of gas or air is obstructed. Therefore, at the time of dismantling, it is necessary to carry out curing, but at the start of dismantling, since the multi-stage burner duct does not appear on the surface, effective curing cannot be performed.
Therefore, when the upper part of the multi-stage burner duct appears after the start of dismantling, the dropping of the brick dust can be prevented by installing a drop lid on the multi-stage burner duct. This drop lid has a support on the top surface of the dismantled brick, and a structure that hangs the lid member with a rod or pipe of about 2 to several pieces of brick from the support, rods and pipes Bricks can be prevented from falling down below the multi-stage burner duct while dismantling the length.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a method for transferring bricks of a Carl still coke oven, in which a part of a furnace wall brick is dismantled prior to a full-scale dismantling of bricks in a transfer section. Close the bottom gas port, then close the gas port or air port provided in multiple stages on the flue partition at the transshipment boundary, and then sequentially dismantle the brick of the upper horizontal flame duct from the kiln mouth When reaching the boundary with the non-repair part wall, two
The above-mentioned flew upper end hole is closed, and furthermore, the horizontal flame passage section is closed, so that the hot air from the non-repair part is shut off, so that safe dismantling work can be performed.

An embodiment 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. A large number of the coking chambers 2 and the combustion chambers 4 are alternately adjacent to each other and 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 portion on the kiln opening side from the transshipment boundary 7 is transshipped. The two adjacent carbonization chambers 2 are empty furnaces, and the outer wall surface of the combustion chamber 4 on the side of the carbonization chamber 2 from the transfer portion boundary 7 of the wall body 3 to be transshipped to 2 to 3 flue, The cross section in the coking chamber 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 fastened by the fastening fitting 6 so as to be in close contact with the wall, so that the heat flow is shut off, and the bricks in the transfer area are cooled. The combustion chamber 4 includes a fuel gas or air passage 12 and a flue 11 through which a hot gas flows. At the bottom of the flue 11 is a bottom gas port 13. The bottom gas port 13 is covered so as to cure brick debris so as not to 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. FIG. 2B is a side view of the front view showing a state in which the stand 23 is set up.

In FIG. 1, a heat insulating board or blanket 21 is laid horizontally on the two or more flues 11 in the non-repair part adjacent to the repair part, and the edges of these flues 11 and the horizontal flame path 14 are cut off. After closing the slide brick 15 disposed on the upper part of each flew 11, if this operation is performed, the edging becomes more reliable. A heat insulating blanket 22 is filled in the horizontal flame channel 14 of the non-repair portion at the boundary between the repair portion and the non-repair portion to close the horizontal flame channel 14. As shown in FIG. 2, on the repair side surface of the heat insulating blanket 22,
A shielding plate 23 like a shoji is set up, and a heat insulating material 24 is
When the means for filling is used in combination, the thermal insulation of the horizontal flame path 14 becomes more complete.

The fuel or air passage 12 and the flue 11
Gas ports or air ports 31 are opened in multiple stages in the partition wall. FIG. 3A is an explanatory view showing a state where a 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 the dismantling of the brick, the gas port and the air port 31 that are open to the partition 30 of the flue to be repaired and the non-repaired flue are closed with a heat insulating material 32, and the hot air between the flue of the non-repaired portion and the demolition portion is closed. Flow is completely shut off. In the figure, reference numerals 33 and 34 denote reinforcing plates for reinforcing the heat insulating material 32.

FIG. 5 shows a state in which the demolition of the bricks of the combustion chamber from the upper part in the kiln opening direction is sequentially performed. The multi-stage burner duct 12 which is a passage for fuel gas or air appears while the partition wall 30 forming the combustion chamber brick is dismantled from the upper part in the kiln opening direction.
The lid 40 is dropped from the upper part of the multi-stage burner duct 12 and dropped into the multi-stage burner duct 12 to close the opening. As shown in FIGS. 5 and 6, the drop lid 40 may be such that the heat insulating lid 43 and the collar 41 are connected by a rod 42. The material of the dropping lid can be used as long as it can withstand high temperatures such as steel or refractory. Further, different materials may be used for each member. If the heat-insulating lid 43 is large enough to substantially cover the inside of the multi-stage burner duct, it is possible to prevent the brick chips from falling down when they are dismantled. By making the collar 41 slightly larger than the cross section of the multi-stage burner duct, the drop of the drop lid can be prevented. The length of the rod 42 may be about two to several bricks.

As shown in FIGS. 5 and 6, brick debris generated during the disassembly of the partition wall 30 is blocked by the flange 41 of the drop lid 40 or the heat insulating lid 43 and does not fall below the multi-stage burner duct. At this time, the rod 42
Since it has a length of about several steps, it is possible to prevent brick chips from falling into the inside of the multi-stage burner duct surrounded by the partition walls even when disassembling the partition walls 30 on which the drop lids are installed. Further, the dropping lid can shut off the high-temperature gas that blows out at a high temperature, so that the safety of the dismantling operation can be maintained.

[0023]

According to the present invention, in the reloading of bricks of the Carl still coke oven, the boundary between the repaired part and the non-repaired part is appropriately insulated and the heat flow is cut off, so that safe dismantling work can be performed. became. In addition, it was possible to prevent the furnace wall surface from being cooled, thereby preventing the burner duct brick from cracking or falling.

The present invention can be easily applied to coke ovens of a type other than the Carl Still type.

[Brief description of the drawings]

FIG. 1 (a) is a front view showing a sealed horizontal flame path, and FIG.
It is a side view.

FIG. 2A is a front view showing a shield plate of a horizontal flame path, and FIG.
It is a side view.

FIG. 3 is an explanatory diagram of a 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 use state of a drop lid when dismantling a brick.

6 is a view as viewed in the direction of arrows AA in FIG. 5;

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coke oven 2 Carbonization chamber 3 Wall 4 Combustion chamber 5 Insulation material 6 Fastening fitting 7 Transit boundary 8 Door 9 Heat storage chamber 11 Flue 12 Fuel or air passage (multi-stage burner duct) 13 Bottom gas port 14 Horizontal flame path 15 Slide brick 21 Blanket 22 Insulation blanket 23 Shielding plate 24 Insulation material 25 Fixing bracket 30 Partition wall 31 Gas port or air port 32 Insulation material 33, 34 Reinforcement plate 40 Drop lid 41 Collar 42 Rod 43 Insulation lid 51 Charcoal truck 52 Extruder 53 Fire extinguisher 54 Guide car 61 Fuel gas 62 Air

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nozomi Tamura 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Prefecture Inside the Chiba Works, Ltd. (72) Inventor Shinya Shinde 4-1-1-17 Tsukiji, Chuo-ku, Tokyo F-term in Otto Co., Ltd. (reference) 4K051 AA08 AB03 LH00

Claims (4)

[Claims] At the time of partial hot transfer repair of a combustion chamber brick of a two-piece coke oven having a horizontal flame path at the upper part of the combustion chamber, the upper ends of two or more flue of a non-repair part adjacent to the transfer part are insulated. A method for heat insulation in a furnace when repairing a coke oven brick, wherein the furnace is closed with a material and the cross section of the horizontal flame path is closed. 2. The furnace insulation according to claim 1, wherein a gas port and an air port opened on the boundary wall of the flue adjacent to the transshipment portion are closed with a heat insulating material. Method. 3. A heat insulating material is installed so as to cover an outer wall surface of the combustion chamber corresponding to a length of 2 to 3 flue of a non-repair portion adjacent to the transshipment portion, and an end of the heat insulating material in a furnace length direction. 3. A method according to claim 1 or 2, wherein the furnace is surrounded by a heat insulating material up to the opening of the combustion furnace next to the combustion furnace to be repaired. 4. The coke oven brick repairing method according to claim 1, wherein a dropping lid is placed from above on a passage of combustion gas and air that appears when the transshipment portion is dismantled. Furnace insulation method.