JPH0641539A - Method for controlling temperature of non-mending part in hot-mending of coke oven - Google Patents

Abstract

PURPOSE:To provide a temperature-controlling method to facilitate the control of temperature in the curing of brick of a non-mending part in the hot-mending of a carbonization chamber, etc., of a coke oven. CONSTITUTION:A COG-shutoff plug 2 is placed at the boundary of a mending part 1 positioned at the side of an air-feeding pipe 5 of a horizontal COG duct 3 and a non-mending part 11 positioned at the side of a COG-feeding pipe 4. COG is supplied from the other part of the horizontal duct 3 exclusively to the non-mending part of the combustion chamber partitioned with the plug to control the temperature of the non-mending part. The process facilitates the temperature control of the non-mending part, enables the curing and temperature control in the mending work over the whole area of the oven not restricted to the mending area and improves the temperature controlling efficiency and safety by properly using fuel gas and electric heater as subsidiary heat-sources.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control method for curing non-repaired bricks without cooling in hot repair brick transshipment work such as in a carbonization chamber of a coke oven.

[0002]

2. Description of the Related Art A coke oven which is widely used for steelmaking today has a heat storage chamber in the lower half, and carbonization chambers and combustion chambers are alternately arranged horizontally in the upper portion of the coke oven to keep gas in the combustion chamber. By the combustion, the heat of combustion dry-distills the charged coal in the carbonization chamber to produce coke.

The coke oven is a refractory brick construction, and in particular, the carbonization chamber wall brick is heated from the adjacent combustion chamber and is constantly exposed to a high temperature of 1000 to 1200 ° C., in which the wet coal is charged and the furnace is used. Since the bricks are cooled rapidly, friction due to extrusion of carbonized coke, carbon adhesion and peeling generated during lateral pressure and carbonization, etc. are repeatedly operated under severe conditions, damage to the bricks due to long-term use , Cracks, corner breaks, etc. occur. So check this on a regular basis,
Part of the damaged wall bricks is repaired by hot brick transshipment method.

In this case, if the temperature of the combustion chamber adjacent to the carbonization chamber is lowered too much, cracks may occur in the brick wall, so in order to minimize the thermal change of the brick and joint during repair. Moreover, it is necessary to maintain the working environment by keeping the brick temperature of the non-repaired part as high as possible and cooling the repair work section as much as possible to suit the construction work of the worker.

As described above, in the coke oven, the combustion chambers and the carbonization chambers are alternately arranged, and the combustion chambers are partitioned in the furnace length direction into chambers so that the amount of supply gas and air can be adjusted for each chamber. ing.

In this case, as the fuel gas normally supplied to the combustion chamber, a mixed gas (M
G) is an under jet method that is supplied vertically from the basement of the coke oven, and COG-only rich gas is a gun type method that is supplied from one direction of the coke oven furnace side through the upper horizontal tube of the heat storage chamber. The fuel is supplied and burned, and each combustion chamber is maintained at a predetermined temperature.

However, when hot-repairing the walls of the carbonization chamber, etc., when maintaining and curing the non-repaired part brick at a high temperature, this normal gas supply path is cut off, so that fuel gas etc. is supplied through another supply path. It is necessary to keep the brick temperature high.

[0008]

SUMMARY OF THE INVENTION In the hot repair brick transshipment work described above, Japanese Patent Publication No. 61-52195 discloses "Adjacent flue at the time of hot transshipment of coke oven" as a means for maintaining bricks at non-repaired parts at a high temperature. A temperature control method "is disclosed.

However, this technique can be applied only to the repair work on the fuel gas supply side at the furnace end of the coke oven, and it is difficult to completely prevent the fuel gas from leaking and to adjust the gas amount. There are problems such as having to handle long objects in part repair.

In view of the above problems, the present invention easily controls the temperature adjustment of the non-repair section adjacent to the hot repair brick transshipment section and the non-repair section at the time of repairing multiple carbonization chamber walls, and repairs the entire coke oven. Provided is a temperature control method that enables time temperature control.

[0011]

According to a first aspect of the present invention, in a coke oven which is constructed by partitioning a combustion chamber into a plurality of chambers in a furnace length direction, air is supplied from one of horizontal ducts laid under the combustion chamber, Further, in the temperature control method of supplying the fuel gas from the other side and supplying the fuel gas and the air to each of the partitioned chambers, a repair portion located on the air supply side of the horizontal duct and a non-repair located on the fuel gas supply side A coke oven hotter characterized in that a temperature-controlling is performed by providing a gas-sealing tight plug at the boundary position with the section and supplying the fuel gas from the other side of the horizontal duct only to the non-repair section side of the partitioned combustion chamber. This is a temperature control method for the non-repaired part during repair.

Further, in the first aspect of the present invention, a gas shut-off plug is provided at a boundary position between the non-repair portion located on the air supply side of the horizontal duct and the repair portion located on the fuel gas supply side, and the other side of the horizontal duct. In this temperature control method, the supplied fuel gas is supplied only to the non-repair part of the partitioned combustion chamber through the erection pipe to control the temperature.

According to the second aspect of the present invention, in a coke oven which is constructed by partitioning the combustion chamber into a plurality of chambers in the longitudinal direction of the coke oven, air is supplied from one of the horizontal ducts laid under the combustion chamber and fuel gas is supplied from the other. In the temperature control method of supplying fuel gas and air to each of the partitioned chambers, when repairing the central portion in the furnace length direction, the boundary position between the repair gas supply side of the horizontal duct and the non-repair part Apply a gas shut-off plug to the non-repair part of the partitioned combustion chamber from the other side of the horizontal duct, and insert an electric heater from above into the non-repair part on the air supply side to control the temperature. This is a method for controlling the temperature of the non-repair part during hot repair of the coke oven, which is characterized by being performed.

Further, in the second aspect of the present invention, an electric heater capable of controlling the temperature gradient stepwise in the length direction is inserted from the air supply side of the horizontal duct to control the temperature of the bellows bellows. This is a method for controlling the temperature of the non-repaired part during hot repair of the furnace.

According to a third aspect of the present invention, in a coke oven which is constructed by partitioning the combustion chamber into a plurality of chambers in the longitudinal direction of the coke oven, air is supplied from one of the horizontal ducts laid under the combustion chamber and fuel gas is supplied from the other. In a temperature control method of supplying fuel gas and air to each of the partitioned chambers, in repairing over the entire width in the furnace length direction, in the longitudinal direction from both the fuel gas supply side and the air supply side of the horizontal duct. A coke oven hotter characterized by inserting an electric heater that can control the temperature gradient in stages into the coke oven, and further inserting an electric heater through the coal charging hole in the ceiling part or the peephole in the upper part of the combustion chamber to control the temperature. This is a temperature control method for the non-repaired part during repair.

[0016]

According to the first aspect of the present invention, when the repair portion is provided on the air supply side, a gas shut-off plug is provided at the boundary position between the horizontal duct and the non-repair portion located on the fuel gas supply side to remove the fuel gas. The temperature can be controlled by supplying it to the non-repair part of the partitioned combustion chamber.

On the contrary, when there is a repair section on the fuel gas supply side, similarly, a tight plug for gas cutoff is provided at the boundary position between the repair section and the non-repair section, and the fuel gas is partitioned through the erection pipe into the combustion chamber. The temperature can be controlled by supplying the air to the non-repair part on the air supply side.

When there is a repair portion at the central portion in the lengthwise direction of the furnace, a gas shut-off plug is provided at the boundary position between the repair portion and the non-repair portion on the fuel gas supply side of the horizontal duct, and the fuel gas is partitioned as described above. Further, the temperature can be controlled by supplying the non-repair part of the combustion chamber and inserting the electric heater into the non-repair part on the air supply side from above.

Further, in the case where there is a repair portion in the central portion, an electric heater capable of controlling the temperature gradient stepwise in the lengthwise direction is inserted from the air supply side of the horizontal duct to control the temperature of the bellows chamber lower bellows portion. It can be carried out.

When repairing the entire width of the furnace in the longitudinal direction, electric heaters capable of stepwise temperature gradient control are inserted from both the fuel gas supply side and the air supply side of the horizontal duct, and the ceiling portion is further installed. The temperature can be controlled by inserting an electric heater through the coal charging hole or the upper hole of the combustion chamber.

As described above, it is possible to easily control the temperature adjustment of the non-repair portion adjacent to the hot repair brick transshipment section and the non-repair portion when repairing the walls of a plurality of carbonization chambers, and to control the entire coke oven during repair. It enables temperature control.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment, which is a case where the brick wall of the carbonization chamber is repaired from the kiln port on the air supply pipe side opposite to the COG supply side to the back.

In the present embodiment, a COG shut-off plug 2 is provided at the boundary position between the repair section 1 of the COG horizontal duct 3 located on the air supply pipe 5 side and the non-repair section combustion chamber 11 located on the COG supply pipe 4 side. COG which is rich gas from the COG supply pipe 4
Is supplied to the non-repair part combustion chamber 11 from inside the partitioned horizontal duct 3 to control the non-repair part to a predetermined temperature. In the figure, 9 is a carbonization chamber of the coke oven, a structure located below the combustion chamber, and 10 is a carbonization chamber.

FIG. 2 shows a second embodiment in which the brick wall of the carbonization chamber is repaired in a single row from the kiln opening on the COG supply side to the back.

In this embodiment, a COG shut-off plug 2 is provided at the boundary between the non-repair part combustion chamber 11 located on the side of the air supply pipe 5 of the COG horizontal duct 3 and the repair part 1 located on the side of the COG supply pipe 4. The COG supply pipe 4 is closed to the horizontal duct 3 and the erected COG supply pipe 12 is CO
Connect the G supply pipe 4 to the horizontal duct 3 on the repair section 1 side, and
COG is supplied from the OG supply pipe 4 to the non-repair part combustion chamber 11 from inside the partitioned horizontal duct 3 to control the non-repair part at a predetermined temperature.

FIG. 3 shows a third embodiment in which the brick wall in the central portion of the combustion chamber is repaired with only a single row.

In this embodiment, when repairing the central portion in the furnace length direction, the COG shut-off plug 2 is provided at the boundary position between the non-repair section combustion chamber 11a and the COG supply pipe 4 side of the repair section 1 of the COG horizontal duct 3. The COG supply pipe 4 side is supplied to the non-repair part combustion chamber 11a, and the non-repair part combustion chamber 11b on the air supply pipe 5 side is inserted with an electric heater 6 for keeping heat from above to form the non-repair part. Control at a predetermined temperature.

At the time of repairing the central part of the carbonization chamber 10 and the like, it is possible to perform rich gas combustion on both sides of the coke oven on the extruder side and on the coke unloading side where non-repair parts are generated.
Since there is a risk of gas leakage within the construction range, gas combustion is not preferable in either one of the non-repair parts. Therefore, as a heat retaining method, the electric heater 6 is inserted through the upper hole of the combustion chamber to serve as a heat source.

FIG. 4 shows a fourth embodiment in which the brick wall in the central portion of the combustion chamber is repaired over a plurality of rows.

In this embodiment, an electric heater 7 capable of controlling the temperature gradient stepwise in the longitudinal direction is further inserted into the carbonization chamber from the side of the air supply pipe 5 of the COG horizontal duct 3 in the third embodiment. 10 The temperature of the lower bellows part is controlled, and the non-repaired part is controlled to a predetermined temperature.

FIG. 5 shows a fifth embodiment, in which the entire brick wall is repaired from the extruder side to the coke unloading side of the coke oven over a plurality of rows.

In this embodiment, the COG of the COG horizontal duct 3 is
From both the supply pipe 4 side and the air supply pipe 5 side, electric heaters 7 capable of stepwise temperature gradient control in the length direction are inserted to the furnace core, and further, a coal charging hole at the ceiling or a top of the combustion chamber. The electric heaters 8 are inserted through the holes, and the non-repaired parts are controlled at predetermined temperatures. According to this temperature management method, since COG is not used, safety is improved and temperature adjustment is facilitated.

[0034]

As described above, according to the present invention, in the hot repair work of the coke oven, it is possible to easily adjust the temperature of the non-repair part adjacent to the repair section or the non-repair part at the time of repairing a plurality of carbonization chamber walls. It controls the temperature of the coke oven and controls the temperature throughout the coke oven without limiting to the furnace end or center, and also uses the normally used fuel gas or electric heater as a heat source. By using together,
Improves temperature control efficiency and safety.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the temperature control method of the present invention,
(A) is a schematic side view and (b) is a schematic sectional view.

FIG. 2 shows a second embodiment of the temperature control method of the present invention,
(A) is a schematic side view and (b) is a schematic sectional view.

FIG. 3 shows a third embodiment of the temperature control method of the present invention,
(A) is a schematic side view and (b) is a schematic sectional view.

FIG. 4 shows a fourth embodiment of the temperature control method of the present invention,
(A) is a schematic side view and (b) is a schematic sectional view.

FIG. 5 shows a fifth embodiment of the temperature control method of the present invention,
(A) is a schematic side view and (b) is a schematic sectional view.

[Explanation of symbols]

 1 Brick wall repair part 2 COG shut-off plug 3 COG horizontal duct 4 COG supply pipe 5 Air supply pipe 6, 7, 8 Electric heater for heat insulation 9 Structure located under combustion chamber 10 Carbonization chamber 11 Non-repair part Combustion chamber 12 Installation COG supply pipe

Claims (5)

[Claims] 1. A coke oven having a combustion chamber divided into a plurality of chambers in a lengthwise direction of the coke oven. Air is supplied from one of horizontal ducts laid at the bottom of the combustion chamber and fuel gas is supplied from the other of the horizontal ducts. In the temperature control method for supplying fuel gas and air to each of the chambers, a gas shutoff stopper is provided at the boundary position between the repair section located on the air supply side of the horizontal duct and the non-repair section located on the fuel gas supply side. A temperature control method for a non-repair part during hot repair of a coke oven, wherein temperature control is performed by supplying fuel gas from the other side of the horizontal duct only to the non-repair part of the partitioned combustion chamber. 2. A tight plug for gas cutoff is provided at a boundary position between a non-repair part located on the air supply side of the horizontal duct and a repair part located on the fuel gas supply side, and the fuel gas supplied from the other side of the horizontal duct is installed. The temperature control method of the non-repair part at the time of hot repair of the coke oven according to claim 1, wherein the temperature is controlled by supplying the temperature to the non-repair part of the partitioned combustion chamber through a pipe. 3. A coke oven having a combustion chamber divided into a plurality of chambers in the lengthwise direction of the coke oven. Air is supplied from one of the horizontal ducts laid at the bottom of the combustion chamber and fuel gas is supplied from the other of the horizontal ducts. In the temperature control method of supplying fuel gas and air to each of the chambers, when repairing the central portion in the furnace length direction, a gas shut-off plug is provided at the boundary position between the repair gas supply side and the non-repair part of the horizontal duct. The fuel gas is supplied to the non-repair part of the partitioned combustion chamber from the other side of the horizontal duct, and an electric heater is inserted into the non-repair part on the air supply side from above to control the temperature. Temperature control method for non-repaired part during hot repair of coke oven. 4. An electric heater capable of controlling a temperature gradient stepwise in the lengthwise direction is inserted from the air supply side of a horizontal duct to control the temperature of the bellows chamber lower bellows portion.
Method for controlling temperature of non-repaired part during hot repair of coke oven described. 5. A coke oven having a combustion chamber divided into a plurality of chambers in the lengthwise direction of the coke oven, the air being supplied from one of the horizontal ducts laid at the bottom of the combustion chamber and the fuel gas being supplied from the other of the horizontal ducts. In the temperature control method for supplying the fuel gas and the air to the respective chambers, when repairing the entire width in the furnace length direction, the temperature is gradually increased in the length direction from both the fuel gas supply side and the air supply side of the horizontal duct. Non-repair during hot repair of coke oven characterized by inserting an electric heater that can control the gradient and further inserting an electric heater from the coal charging hole in the ceiling or the peephole in the upper part of the combustion chamber to control the temperature Method of temperature control of parts.