JP2564232B2 - Insulation box used for hot repair work of coke oven and its installation method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulation box used for hot repair work of a horizontal double-row coke oven (hereinafter referred to as "coke oven") and a method for installing the heat insulation box.

[0002]

2. Description of the Related Art In the structure of a coke oven widely used for steelmaking today, as shown in FIG. 3, a heat storage chamber 33 is constructed in the lower half, and a carbonization chamber 31 and a combustion chamber 32 are alternately arranged horizontally in the upper portion thereof. When the gas is combusted in the combustion chamber 31, the combustion heat of the gas dry-distills the charging coal in the carbonization chamber 31 to produce coke.

The size of the carbonization chamber 31 is approximately 4 to 7 for the furnace height.
m, furnace width 400 to 500 mm, furnace length 13 to 17 m, and an ascending pipe for collecting gas and tar, a generated gas collecting main pipe (not shown), and a coal charging port 34 at the upper part thereof.
Then, the furnace lids 35 are attached to both ends.

Coke ovens are refractory brick constructions,
In particular, the bricks in the carbonization chamber are heated by the adjacent combustion chamber and are constantly exposed to a high temperature of 1000 to 1200 ° C., in which the wet coal is charged to quench the bricks in the furnace, and the extruded carbonized coke. Since the operation is repeated under severe conditions such as friction due to friction, side pressure, and carbon adhesion and peeling that occur during carbonization, bricks will be damaged, cracked, and chipped due to long-term use. Therefore, this is regularly inspected and the damaged wall bricks are partially repaired by the 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 in 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.

[0006]

Conventionally, in order to carry out hot repair work in this carbonization chamber, a method of installing a heat insulating box in the carbonization chamber and performing repair has been adopted.

FIG. 4 is a drawing showing "a method for inserting a heat insulating curtain during hot repair of a coke oven" disclosed in Japanese Patent Laid-Open No. 59-113088.

According to this technique, a heat insulating curtain 41 and a balance weight 42 covered with a heat insulating material are preliminarily attached outside the furnace via a hanging beam 43, and the crane 44 lifts this structure to keep the balance weight 42 while keeping the balance.
Is moved to the outside and the heat insulating curtain 41 is inserted into the carbonization chamber 45. If the heat insulating curtain 41 is inserted into the carbonization chamber 45, the unnecessary balance weight 42 is gradually removed.

By the way, in this method, in order to insert the large heat insulation curtain 41, the balance weight 42 becomes very heavy, and after the heat insulation curtain 41 is installed in the carbonization chamber 45, the balance weight 42 is installed. Requires a complicated procedure of having to be removed.

Further, in this method, compressed air is introduced from the end of the carbonization chamber 45 into the heat insulating curtain 41, which is the construction work site, in order to ensure the temperature of the construction work atmosphere, so that the bricks in the carbonization chamber are locally cooled. However, it may damage the brick.

FIG. 5 is a drawing showing "a method for inserting a heat insulating curtain during hot repair of a coke oven" disclosed in Japanese Patent Laid-Open No. 56-125481.

According to this technique, a rail 52 is previously installed on the ceiling of the carbonization chamber 51, and a heat insulating box 53 whose periphery is covered with a heat insulating material is previously assembled outside the furnace.
Using the rail 52 as a fulcrum, it is inserted into the carbonization chamber 51 like a hanging monorail.

In this method, it is necessary to install the rail 52 on the ceiling of the carbonization chamber as described above, but in this case, the charging port 54 having a diameter of about 500 mm for charging coal is provided in the upper part of the carbonization chamber 51 with 4 to 4 mm. Since it is installed at five places, the rail 52 is hung by the chain 55 using the loading port 54.

The ends of the rails 52 are welded to a steel back stay 56 installed outside the carbonization chamber 51. In this way, the rail 52 is suspended and supported by the chain 55 and the back stay 56 using the loading port 54.

However, since the carbonization chamber 41 is usually at a high temperature of about 1000 ° C., it is necessary to cool the carbonization chamber to about 500 ° C. in consideration of the heat resistance of the chain 55 that suspends the rails. Since it has a large heat capacity, it is difficult to rapidly lower the temperature, and it takes a very long time to cool to about 500 ° C.

Further, the durable long rail 52 is attached to the carbonization chamber 5.
(1) The work of inserting and installing in the ceiling part is difficult because of high heat work, and the rail also becomes high temperature, so there is a drawback that problems also occur in terms of material and strength.

The present invention solves the above problems and provides a heat insulation box which is easy and quick to install and remove in the hot repair work of a coke oven and has a function of adjusting the temperature of the work atmosphere, and a method for installing the same.

[0018]

In the heat insulation box of the present invention, a vertical duct is attached downward to one end of a ceiling duct having a predetermined length in the horizontal direction, and the vertical duct has suction positions above and below. A plurality of adjustable suction holes are provided in the vertical duct, and vertical stiffeners that hang down from the ceiling duct at appropriate intervals so that they can be removed, and horizontal stiffeners that connect the lower ends of the vertical ducts and vertical stiffeners. A hot frame of a coke oven characterized in that a rigid frame is attached to form a rectangular frame with ceiling and vertical ducts and vertical and horizontal stiffeners, and a heat insulating material is spread on one side of the rectangular frame. An insulation box used for repair work.

The method of installing the heat insulation box of the present invention is as follows.
A heat insulation box with a temporary frame installed on the extruder side of the coke oven at the same level as the floor of the carbonization chamber, and a square frame composed of ceiling and vertical ducts and vertical and horizontal stiffening materials via a roller conveyor on the frame. , And then bind the chain introduced from the coke discharge side of the carbonization chamber to the lower part of the entire surface of the heat insulation box, pull the chain to the discharge side to introduce the heat insulation box to a predetermined position in the carbonization chamber, and then introduce it. Remove the vertical stiffener and horizontal stiffener from the insulation box while suspending the insulated box from the raw material charging hole provided on the ceiling of the carbonization chamber, and carry it out of the carbonization chamber to set the ceiling and vertical duct at a predetermined height. It is a method of installing a heat insulation box used for hot repair work of a coke oven, which is characterized by being suspended and installed in the coke oven.

[0020]

[Function] As described above, the carbonization chamber has a furnace height of 4 to 7 m,
The furnace width is 400 to 500 mm, the furnace length is 13 to 17 m, it is vertically narrow and very narrow, and the temperature is usually about 1000 ° C. Therefore, 500 ° C is required for hot repair work. It is necessary to cool the carbonization chamber to below a certain level. In addition, while hot repair work is being carried out, coke production operations are continued in other combustion chambers and carbonization chambers. The present invention provides a heat insulating box having a function of adjusting the temperature of a construction work atmosphere, which is easy and quick to install and remove in the carbonization chamber, and a method of installing the same.

In the hot brick transshipment repair, it is necessary to control the temperature of the work atmosphere and to prevent the non-repaired brick from excessively lowering its temperature and preventing its loss. Therefore, in the present invention, a vertical duct having a plurality of suction holes is provided at the deepest position of the compartment so that the outside air flows only in the working compartment, and the hot gas in the carbonization chamber is sucked in and the outside air is introduced into the working compartment. To introduce. The sucked high temperature gas is discharged to the outside by a horizontally provided ceiling duct. In addition, a heat insulating material is spread all over the non-repaired brick side of the back of the work section to block the radiant heat from the back brick.

In order to install and remove the heat insulation box easily and quickly, the box is constructed into a rectangular frame with ceiling and vertical ducts and removable vertical and horizontal stiffeners. Is introduced into the carbonization chamber by pulling it from the side opposite to the insertion side, for example, the coke discharge side.

When the heat insulation box is large, a plurality of vertical stiffeners for supporting the ceiling are required. However, since the width of the carbonizing chamber is as narrow as 400 to 500 mm, the worker works in the carbonizing chamber. In this case, since this pillar becomes an obstacle, the heat insulating box has a structure that can be removed after it is installed in the carbonization chamber.

[0024]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a view showing the structure of a heat insulating box, FIG. 1 (a) is a side view, and FIG. 1 (b) is a front view of a vertical duct.

In the structure of the heat insulation box 1, a vertical duct 3 is attached in an inverted L-shape downward to one end of a ceiling duct 2 having a length of a predetermined work section in the horizontal direction. The vertical duct 3 is provided with a plurality of suction holes 4 on the inner surface side of which an adjusting plate 4a capable of vertically adjusting the suction position is attached. Further, a suction air volume adjustment damper 2a is attached at an appropriate position near the outlet of the ceiling duct 2.

Vertical stiffeners 5 are detachably attached to the lower surface of the ceiling duct 2 at appropriate intervals, and horizontal stiffeners 6 for connecting the lower ends of the vertical ducts 3 and the vertical stiffeners 5 are connected. And a vertical frame 7 is constructed by the ceiling and the vertical ducts 2 and 3 and the vertical and horizontal stiffeners 5 and 6, and a heat insulating material 8 is spread on one side of the rectangular frame 7 so as to cover the entire frame. To wear.

The connection between the ceiling duct 2 and the vertical stiffening member 5 is of a hozo structure to facilitate removal after the heat insulating box 1 is introduced into the carbonization chamber. When the heat insulation box 1 is large, in order to prevent the ceiling duct 2 from bending due to its own weight and heat of the carbonization chamber, a horizontal auxiliary member 6a for connecting the vertical stiffening member 5 and, if necessary, a support member. Attach the rope 9.

The heat insulation box 1 is constructed as described above,
Next, the method of installing this heat insulation box 1 in the carbonization chamber,
This will be described with reference to FIGS. 1 and 2.

FIG. 2 is a side view for explaining an example of a method of installing the heat insulation box. First, the temporary pedestal 13 is installed at the same level as the floor of the coke chamber 12 on the extruder side of the coke oven 11 into which the heat insulation box 1 is inserted. Then, the heat insulating box 1 is mounted on the pedestal 13 with a crane or the like and temporarily placed via the roller conveyor 14.

Next, from the coke discharge side of the carbonization chamber 12,
A chain 15 around which a ceramic fiber, which is a heat insulating material, is wound is introduced and bound to the lower part of the entire surface of the heat insulating box 1. Subsequently, the winch 16 pulls the chain 15 toward the discharge side to introduce the heat insulating box 1 to a predetermined position in the carbonization chamber 12.

At this time, in order to facilitate the introduction of the heat insulation box 1, a boat shoe 10 is attached to the lower portion of the vertical stiffening member 5. The left and right positions of the heat insulating box 1 being introduced are adjusted by the guide chains 17 attached to the left and right of the front surface of the heat insulating box 1.

Next, the heat insulation box 1 introduced at a predetermined position is suspended by a suspension chain 19 inserted through a raw material charging hole 18 provided in the ceiling of the carbonization chamber 12, and the vertical stiffening member 5 is suspended in this suspended state. Further, the stiffening material such as the horizontal stiffening material 6 is removed from the ceiling and the vertical ducts 2 and 3, and this is carried out to secure a working space in the carbonization chamber 12.

The stiffening material and the like can be easily removed by suspending and supporting the entire heat insulation box 1 by the suspension chain 19, and by adjusting the length of the suspension chain 19, the ceiling duct 2 is installed at a predetermined height. it can. After the heat insulation box 1 is installed in the carbonization chamber 12, the suction blower 20 is attached to the outside of the ceiling duct 2 in the furnace.

The heat insulating box 1 is installed as described above, and the suction blower 20 is operated to suck the high temperature gas in the carbonization chamber 12 through the suction hole 4 of the vertical duct 3 and introduce the outside air. In this way, if the ambient temperature of the work compartment drops to some extent, the heat insulating material 8 is attached to the non-repaired part brick on the back of the work compartment using a jack or a turnbuckle to keep the brick warm and block radiant heat. Reserve a parcel.

Further, by adjusting the position of the adjusting plate 4a, it is possible to adjust the intake hole 4 of the vertical duct 3 to control the flow of air in the work compartment and guide the atmosphere to make the operator comfortable. Is. This atmospheric flow is verified by smoke pipes and smoke. Since the ceiling duct 2 and the vertical duct 3 are cooled by the atmosphere that is constantly sucked, it is possible to suppress the strength reduction due to heat.

When a plurality of brick walls are to be transshipped at the same time, it is necessary to insert a plurality of heat insulation boxes 1. In this case, in order to adjust the amount of cooling air introduced for each heat insulation box, each suction air volume is adjusted by the suction air volume adjustment damper 2a installed in the ceiling duct 2.

[0038]

As described above, according to the present invention, a large amount of air can be uniformly distributed in the work compartment by a simple structure in which a vertical duct is attached downward to one end of a ceiling duct provided horizontally. It has an atmosphere temperature control function that can control the flow in the work compartment by introducing an adjustment plate that can adjust the suction position up and down, ensuring a work environment in a high temperature and narrow place such as a carbonization chamber. It is possible to prevent the radiant heat from being blocked by spreading a heat insulating material on the entire surface of one side, and to prevent excessive temperature drop and chipping of the non-repaired part brick.

When introducing the heat insulation box into the carbonization chamber, the heat insulation box is reinforced by a removable stiffening material to facilitate the introduction and make the installation and removal extremely simple and quick. The length is not limited, and it can be assembled in a timely manner depending on the length, which greatly contributes to improving the work efficiency of the hot repair work of the coke oven.

[Brief description of drawings]

1 is a drawing showing an example of a heat insulation box used for hot repair work of the present invention, FIG. 1 (a) is a side view, FIG.
(B) is a front view of a vertical duct.

FIG. 2 is a side view illustrating an example of a method for installing a heat insulation box according to the present invention.

FIG. 3 is a perspective view illustrating an example of the structure of a coke oven.

FIG. 4 is a side view illustrating a method for inserting a heat insulating curtain of a conventional coke oven.

FIG. 5 is a side view illustrating a method of installing a heat insulating material in a conventional coke oven.

[Explanation of symbols]

 1 Heat Insulation Box 2 Ceiling Duct 3 Vertical Duct 4 Vertical Duct Suction Hole 4a Adjustment Plate 5 Vertical Stiffener 6 Horizontal Stiffener 7 Frame 8 Insulation 9 Spline 10 Ship Coke 11 Coking Furnace 13 Temporary Stand 14 Roller Conveyor 15 Chain 16 Winch 17 Guide chain 18 Raw material charging hole 19 Suspended chain 20 Suction blower 31 Coking chamber 32 Combustion chamber 33 Heat storage chamber 34 Coal inlet 35 Furnace lid 41 Insulation curtain 42 Balance weight 43 Hanging beam 44 Crane 45 Carbonization chamber 51 Carbonization Chamber 52 Rail 53 Insulation Box 54 Coal Inlet 55 Chain 56 Back Stay

Claims (2)

(57) [Claims] 1. A vertical duct is attached downward to one end of a ceiling duct having a predetermined length in the horizontal direction, and the vertical duct is provided with a plurality of suction holes on the inner surface side of which a suction position can be adjusted up and down. A vertical stiffener that is provided so as to be detachable at appropriate intervals from the ceiling duct, and a horizontal stiffener that connects the lower ends of the vertical duct and the vertical stiffener are attached to the ceiling and the vertical duct. A heat insulation box used for hot repair work of a coke oven, characterized in that a rectangular frame is constituted by vertical and horizontal stiffening materials, and a heat insulating material is spread on one surface of the rectangular frame. 2. A rectangular frame is provided on the extruder side of the coke oven at the same level as the floor of the carbonization chamber, and a ceiling and a vertical duct and vertical and horizontal stiffeners are mounted on the frame via a roller conveyor. The thermal insulation box configured as above is placed, then the chain introduced from the coke discharge side of the carbonization chamber is bound to the entire lower surface of the thermal insulation box, and the chain is pulled to the discharge side to bring the thermal insulation box to a predetermined position in the carbonization chamber. The vertical and horizontal stiffeners were removed from the thermal insulation box with the installed thermal insulation box suspended from the raw material charging hole provided in the ceiling of the carbonization chamber, and then carried out to the outside of the carbonization chamber to the ceiling and vertical. A method for installing a heat insulation box used for hot repair work of a coke oven, characterized in that the duct is suspended and installed at a predetermined height.