JP4659289B2 - Disassembly method of internal combustion type hot stove - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention has a dome part and a conical part in the upper part, and dismantles and removes the iron shell and refractory of the internal combustion type hot stove disposed in the cylindrical iron skin with the combustion chamber and the heat accumulating chamber arranged next to each other. The present invention relates to a method for disassembling an internal combustion type hot stove.
[0002]
[Prior art]
Conventionally, a method described in Japanese Patent Laid-Open No. 8-260011 is known as a method for dismantling the iron shell and refractory of a hot stove. In this method, a large heavy machine for dismantling is arranged on the bottom wall portion of the dome connecting pipe that connects the heat storage chamber dome and the combustion chamber dome of the external combustion type hot stove, and the refractories of the combustion chamber dome and the heat storage chamber dome are placed. Dismantle and stack the dismantled refractory on the refractory in the heat storage chamber to form a passage, place a heavy machinery for dismantling on the refractory in the heat storage chamber, dismantle the refractory in the heat storage chamber, When disassembling the refractory in the straight body portion, a mounting plate loaded with small heavy machinery for dismantling is supported by a plurality of pins and sequentially lowered, and the refractory is disassembled using the small heavy machinery for dismantling. The type of the hot stove in this method is an external combustion type, and is not an integral internal combustion type in which the combustion chamber and the heat storage chamber are partitioned by a wall refractory, and the iron skin is not disassembled.
Further, in the refractory material dismantling method of the combustion chamber of the external combustion type hot stove described in JP-A-8-226238, a dismantling heavy machine is provided on the surface layer of the granulated slag filled in the combustion chamber. The peripheral refractory is demolished together with granulated slag by heavy machinery, and the dismantled refractory is discharged out of the furnace together with the granulated slag, and the scaffold moves sequentially downward, so the peripheral refractory is disassembled over the entire surface. be able to. In this dismantling method, the combustion chamber is dismantled, the heat storage chamber is not mentioned, and, similar to the one described in JP-A-8-260011, the refractory is simply dismantled, It is not dismantled.
As one method of dismantling the iron shell and refractory of an internal combustion hot stove equipped with a combustion chamber and a heat storage chamber, cut the iron undercut of the hot stove, blast the part and lay the hot stove down, There is a known method of breaking down the iron skin and dismantling the refractory.
[0003]
[Problems to be solved by the invention]
However, the conventional internal combustion type hot stove dismantling method has the following problems to be solved.
At sites where refurbished blast furnace equipment is in the vicinity of the hot blast furnace to be dismantled and there is no space, other equipment may be damaged by blasting or lying down, and there are safety and workability problems in the dismantling work after lying down. there were. Moreover, it was not always possible to lie down by blasting, and in this case, the work man-hours increased significantly.
[0004]
The present invention has been made in view of such circumstances, and provides an internal combustion type hot stove dismantling method that can dismantle the iron skin and refractory safely and in a short time without damaging surrounding facilities. With the goal.
[0005]
[Means for Solving the Problems]
An internal combustion hot stove dismantling method according to the present invention that meets the above-described object has a straight barrel portion that is erected and a dome portion that is connected to the straight barrel portion via a conical portion, and the outer side is an iron skin. The internal combustion type hot stove dismantling method has a lining brick inside, and further, the combustion chamber and the heat storage chamber are separated by a partition brick and arranged next to each other, and the combustion chamber and the heat storage chamber are connected at the top. After dismantling and removing the dome part and conical part, dismantling while moving the heavy equipment for dismantling over the grid-like fall prevention frame lid temporarily placed on the heat storage bricks and combustion chambers arranged in the heat storage chamber Brick scraps dismantled by heavy machinery are dropped into the combustion chamber, and the heavy machinery for dismantling is supported by a wire with a balancer, one end of which is supported by a portal frame temporarily installed in the straight body part, for dismantling work. Do. This allows the demolition heavy equipment to dismantle the refractory without worrying about dropping while moving on the thermal storage brick and the fall prevention frame lid, and to remove the demolished brick scrap into the combustion chamber. The wire is not loosened by the movement of the heavy machine for dismantling.
[0006]
In the internal combustion type hot stove dismantling method according to the present invention, the portal frame can be configured to be fixed to an iron skin that is sequentially cut down of the straight body portion. This makes it possible to dismantle and remove the iron skin and brick together more safely.
In the disassembling method of the internal combustion type hot stove furnace according to the present invention, the portal frame is provided with a means for raising and lowering the fall prevention frame lid, and when the combustion chamber is disassembled, the fall prevention frame lid is raised. It can also be configured to do. As a result, the fall prevention frame lid can be moved up and down reliably through the gate frame, and the fall prevention frame lid can be reliably held on the gate frame.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
FIG. 1 is a front view of a dismantling apparatus used in the disassembling method for an internal combustion hot stove according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. FIG. 4 is a side view of the dismantling apparatus used in the disassembling method of the internal combustion hot stove according to the embodiment, FIG. 4 is a side view thereof, and FIGS. 5 (A) and 5 (B) are respectively an iron skin of the portal frame. FIG. 6 is an explanatory view showing the attachment of the wire with the balancer, FIG. 7 is an explanatory view showing the removal of the iron skin at the top of the dome, and FIG. 8 is an explanatory view showing the dismantling of the refractory brick at the top of the dome. FIG. 9 is an explanatory view showing the removal of the upper iron skin of the dome portion, FIG. 10 is an explanatory view showing the dismantling of the refractory brick of the dome portion and the conical portion, FIG. 11 is the dismantling of the refractory brick of the conical portion and the dome portion, FIG. 12 is an explanatory view showing dismantling and removal of the straight body portion, and FIG. 12 is an explanatory view showing removal of the lower iron skin of the conical portion.
[0008]
As shown in FIGS. 1, 2, and 7 to 12, the disassembling method for an internal combustion hot stove according to an embodiment of the present invention is performed on the upright straight body 10 and the straight body 10. It has a dome part 12 connected via a conical part 11, an outer side becomes an iron skin 13, an inner lining brick 14 is provided, and a combustion chamber 15 and a heat storage chamber 16 are divided by a partition brick 17. A method for disassembling an internal combustion type hot stove arranged adjacent to each other and in which a combustion chamber 15 and a heat storage chamber 16 are connected to each other, and more specifically, dismantling the refractory and the iron skin of the dome portion 12 and the conical portion 13 , Regarding dismantling methods after removal.
[0009]
As shown in FIGS. 1 to 4, a demolition device 18 to which a disassembly method for an internal combustion type hot stove according to an embodiment of the present invention is applied is on a heat storage brick 19 and a combustion chamber 15 arranged in a heat storage chamber 16. While moving the demolition heavy machine 21 over the grid-like drop prevention frame lid 20 temporarily installed on the top, the brick waste 21a dismantled by the demolition heavy machine 21 is dropped and removed to the bottom of the combustion chamber 15, and further dismantling The heavy machinery 21 is configured to be disassembled by being supported by a wire 23 with a balancer, one end of which is supported by a portal frame 22 temporarily installed in the straight body portion 10. These will be described in detail below.
[0010]
As shown in FIGS. 1 to 4, the gate-type frame 22 includes four vertical members 24 to 4 which are temporarily installed on the upper part of the iron shell 13 of the cut straight body 10 at the lower four positions. 27 and a rectangular frame 28 having the lower surfaces of the four corners fixed to the upper ends of the vertical members 24 to 27.
As shown in FIG. 3, the frame 28 has two long members 30 and 31 made of H-shaped steel that are slightly shorter than the diameter D of the upper surface 29 of the iron shell 13. It is arranged with a gap T, and both ends of the long materials 30, 31 are connected by two short materials 32, 33 made of H-shaped steel of the same size to form a rectangular frame. Yes. As shown in FIG. 3, between the long materials 30 and 31 inside the short materials 32 and 33, two reinforcing members 34 and 35 made of a small H-shaped steel are arranged with a parallel interval h. Further, inside the reinforcing members 34 and 35, two supporting members 36 and 37 made of small H-shaped steel are arranged with a parallel interval t. Moreover, the diagonal members 38-43 provided horizontally are arrange | positioned as shown in the figure, and the frame 28 is reinforced.
As shown in FIGS. 1 and 4, there is a reinforcement between the lower surfaces of the long members 30 and 31 and the short members 32 and 33 constituting the frame 28 and the inner side surfaces of the adjacent vertical members 24 to 27. The diagonal members 44 to 47 are arranged as shown in the drawing to reinforce the portal frame 22.
[0011]
As shown in FIGS. 5A and 5B, a rectangular seat plate 48 is fixed to the lower end of the vertical member 24 (the same applies to 25 to 27), and the lower surface of the seat plate 48 is rectangular. A pair of guide plates 49 and 50 are provided at predetermined parallel intervals with the end of the long plate inclined outward. When the portal frame 22 is temporarily installed on the straight body portion 10, the upper end portion of the iron skin 13 is guided by the tip portions of the guide plates 49 and 50. In the upper part of the guide plates 49, 50, insertion holes 53 into which the fixing pins 52 inserted through the mounting holes 51 formed in the iron shell 13 are inserted are formed, and the fixing pins 52 are split pins through the washers 54. The guide plates 49 and 50 are fixed by 55.
[0012]
As shown in FIGS. 1, 3, 4, and 6, the center part of the support members 36 and 37 of the gantry frame 28 of the portal frame 22 is attached to a dismantling heavy machine 21 via a mounting bracket (not shown). A pulley 56 for the wire 23 attached in this manner is rotatably provided via a bearing bracket 57. A pulley 58 corresponding to the pulley 56 is rotatably provided at the center of the short material 32 of the gantry frame 28 via a bearing bracket 59.
[0013]
As shown in FIG. 6, a pair of long and rectangular sliding guide plates 61 and 62 are provided on the lower surface 60 of the short material 32 of the gantry frame 28 at a predetermined parallel interval. . Between the sliding guide plates 61 and 62, a pulley 63 that is guided by the sliding guide plates 61 and 62 and can move up and down is rotatably provided via a bearing bracket 64. A plurality of rectangular weight pieces 65 for counterweight, which is an example of a balancer that can be attached and detached by bolts and nuts, are stacked and attached to the lower portion of the bearing bracket 64. By adjusting the number of weight pieces 65, it is possible to adjust the tension of the wire 13 (the tension at which the wire 13 is not loosened even by the movement of the dismantling heavy machine 21).
[0014]
As shown in FIG. 1, the other end of the wire 23 whose one end is fixed to the dismantling heavy machine 21 is connected to the lower surface 60 of the gantry frame 28 via a pulley 56, a pulley 58, and a pulley 63. It is fixed to. As shown in FIG. 6, a stopper 68 is provided on the lower surface 60 of the short material 32 between the sliding guide plates 61 and 62 so as to come into contact with the upper surface 67 of the bearing bracket 64 that slides up and down.
Accordingly, the wire 23 is led out and inserted in accordance with the movement of the dismantling heavy machine 21, and the amount of the wire 23 drawn can be regulated by the stopper 68. Therefore, the wire 23 is loosened and the dismantling heavy machine 21 moves. In addition, the dismantling heavy machine 21 does not interfere with the dismantling, and the dismantling heavy machine 21 can be reliably prevented from falling.
[0015]
The structure of the fall prevention frame lid 20 will be described with reference to FIG. The fall-preventing frame lid 20 includes a pair of main cross members 69, 70 arranged at a parallel interval, and the main cross members 69, 70 outside the main cross members 69, 70 or between the main cross members 69, 70. Main longitudinal members 71 to 76 provided orthogonal to each other. Further, auxiliary vertical members 77 and 78 that connect both ends of the main cross members 69 and 70, the front ends of the main vertical members 71 and 72, and the auxiliary cross members 79 that connect the front ends of the main vertical members 73 and 74, 80, and diagonal members 81-84 connecting the ends of the main longitudinal members 71-74 adjacent to both ends of the main transverse members 69, 70, and as shown in the figure, the main transverse members 69, A plurality of auxiliary longitudinal members are provided in parallel with 70. Accordingly, the fall prevention frame lid 20 is composed of eight auxiliary cross members 79, diagonal members 82, auxiliary vertical members 78, diagonal members 84, auxiliary horizontal members 80, diagonal members 83, auxiliary vertical members 77, and diagonal members 81 in sequence. Are formed in a flat octagon shape connected by the outer shape member, and in a lattice shape so that the brick waste 21a passes and falls. The fall prevention frame lid 20 is made of a material made of a shape steel such as an H-shaped steel or a grooved steel.
[0016]
As shown in FIG. 1, the portal frame 22 is provided with elevating means (not shown, for example, a hoist) for elevating and lowering the fall-preventing frame lid 20 via a hanging portion 20a made of a chain or the like. When disassembling the combustion chamber 15, as shown by the solid line, the fall prevention frame lid 20 is raised, while on the other hand, when disassembling the brick on the heat storage chamber 16 side, As indicated by a two-dot chain line, the fall prevention frame lid 20 is disposed on the opening of the combustion chamber 15, and the dismantling heavy machine 21 moves on the fall prevention frame lid 20.
[0017]
Next, a method for disassembling an internal combustion hot stove according to an embodiment of the present invention using the disassembling apparatus 18 will be described with reference to FIGS. 1 and 7 to 12.
(1) A heavy machine mounting base 85 (see FIG. 8) is installed on top of the dome portion 12 of a plurality of internal combustion hot stoves.
(2) As shown in FIG. 7, the dome top iron skin 86 of the dome portion 12 is gas cut, removed and opened.
(3) As shown in FIG. 8, a large heavy machine (breaker) 87 is placed on a heavy machine mounting base 85, the dome brick 88 is disassembled by the large heavy machine 87, and brick waste is dropped into the furnace.
(4) As shown in FIG. 9, the dome brick 88 is disassembled with a large heavy machine 87 after the opening portion of the dome top iron shell 86 is enlarged by cutting and removed.
(5) As shown in FIG. 10, after disassembling heavy machine 21 is mounted on heat storage chamber 16, portal frame 22 is set, and wire 23 with a balancer (with tension counterweight) is attached to dismantling heavy machine 21. Install and dismantle the dome brick 88 further.
[0018]
(6) As shown in FIG. 11, after dropping the refractory bricks up to the straight body part 10 (about 1 m below the conical part 11), the iron shell 13 and the existing deck 89 are cut and removed in a vertical split.
(7) As shown in FIG. 12, after disassembling heavy machinery 21 is placed on the upper surface of the heat storage brick 19 of the straight body portion 10, the portal frame 22 is temporarily installed on the remaining portion of the iron shell 13 (see FIG. 5).
(8) As shown in FIG. 1, a drop prevention frame lid 20 is temporarily installed at the opening of the combustion chamber 15, and a wire 23 with a balancer is attached to the demolition heavy machine 21.
(9) The demolition heavy machine 21 is moved on the heat storage brick 19 and the fall prevention frame lid 20 and, if necessary, the fall prevention frame lid 20 is appropriately lifted and lowered by the lifting means. The brick is demolished, and the brick waste 21a is dropped to one place at the bottom of the combustion chamber 15 via the fall prevention frame lid 20.
(10) Lower the level according to the dismantling level to cut the iron skin 13, and transfer and fix the gate-type frame 22 to the iron skin 13 with the straight body 10 cut down.
(11) After that, dismantling work is performed by repeating the steps (9) and (10).
Depending on the situation, the dismantling heavy machine 21 can be used instead of the large heavy machine 87.
[0019]
In the above embodiment, when the straight body portion 10 is disassembled, the iron skin 13 is cut and removed, and the portal frame 22 is fixed to the iron skin 13 that is sequentially cut down of the straight body portion 10. However, the present invention is not limited to this, and the iron skin 13 may not be cut or removed as necessary.
When the gate frame 22 is provided with an elevating means for the fall prevention frame lid 20 and the combustion chamber 15 is disassembled, the fall prevention frame lid 20 is raised, but the present invention is not limited to this. The prevention frame lid 20 can be raised and lowered by other methods.
The wire 23 attached to the demolition heavy machine 21 is tensioned via a movable pulley (pulley 63) provided with a counterweight, but is not limited thereto, and the wire 23 can be tensioned by other methods. Moreover, when the derived amount is small, the wire 23 can be tensioned through the fixed pulley.
[0020]
The fall prevention frame lid 20 has a structure in which the shape steel is configured in a lattice shape, but is not limited to this, and has sufficient strength against the loading and movement of the heavy machine 21 for dismantling, and the brick scrap 21a. Any structure may be used as long as a hole having a size capable of passing through is formed and disposed at the upper end of the combustion chamber 15.
Although the four vertical members 24 to 27 are provided on the lower surface 60 of the gantry frame 28 in the portal frame 22, the present invention is not limited thereto, and three or five or more vertical members are provided on the gantry frame depending on the situation. You can also
[0021]
【The invention's effect】
In the disassembly method of the internal combustion type hot stove according to claims 1 to 3, the dismantling heavy machine can dismantle the refractory without fear of dropping while moving on the heat storage brick and the fall prevention frame lid. The demolished brick scrap can be dropped and removed into the combustion chamber, so that the demolishing and discharging operations can be performed safely and easily, and at the same time, the wire is not loosened by the movement of the demolishing heavy machinery. There is no stepping on or damage, and safety is improved.
In particular, in the dismantling method of the internal combustion type hot stove according to claim 2, since the iron skin and the brick can be disassembled and removed together more safely, the safety and workability of the dismantling work are improved.
In the disassembling method of the internal combustion type hot stove according to claim 3, the fall prevention frame lid can be surely raised and lowered through the gate frame, and the fall prevention frame lid is securely attached to the gate frame. Therefore, safety is further improved.
[Brief description of the drawings]
FIG. 1 is a front view of a dismantling apparatus used in a disassembling method for an internal combustion hot stove according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
FIG. 3 is a plan view of a portal frame of a dismantling apparatus used in a disassembling method for an internal combustion hot stove according to an embodiment of the present invention.
FIG. 4 is a side view of the same.
FIGS. 5A and 5B are explanatory views showing a method for fixing a portal frame to an iron skin, respectively.
FIG. 6 is an explanatory view showing attachment of a wire with a balancer.
FIG. 7 is an explanatory view showing the removal of the iron skin at the top of the dome.
FIG. 8 is an explanatory view showing the dismantling of the refractory brick at the top of the dome.
FIG. 9 is an explanatory view showing removal of the upper iron skin of the dome portion.
FIG. 10 is an explanatory view showing the dismantling of the refractory bricks of the dome part and the conical part.
FIG. 11 is an explanatory view showing the dismantling of the refractory brick in the conical part and the removal of the lower iron skin of the dome part and the conical part.
FIG. 12 is an explanatory diagram showing dismantling and removal of the straight body part.
[Explanation of symbols]
10: straight body part, 11: conical part, 12: dome part, 13: iron skin, 14: lining brick, 15: combustion chamber, 16: heat storage room, 17: partition brick, 18: demolition device, 19: heat storage brick , 20: Fall prevention frame lid, 20a: Hanging part, 21: Demolition heavy machine, 21a: Brick scrap, 22: Gate frame, 23: Wire, 24-27: Vertical member, 28: Mounting frame, 29: Upper surface , 30, 31: long material, 32, 33: short material, 34, 35: reinforcing member, 36, 37: support member, 38-43: oblique member, 44-47: oblique member, 48: seat plate, 49 , 50: guide plate, 51: mounting hole, 52: fixing pin, 53: insertion hole, 54: washer, 55: split pin, 56: pulley, 57: bearing bracket, 58: pulley, 59: bearing bracket, 60: Lower surface, 61, 62: sliding guide plate, 63: Pooh -, 64: Bearing bracket, 65: Weight piece, 66: Wire fixing bracket, 67: Upper surface, 68: Stopper, 69, 70: Main cross member, 71-76: Main vertical member, 77, 78: Auxiliary vertical member, 79, 80: Auxiliary cross member, 81-84: Diagonal member, 85: Heavy machine mounting base, 86: Dome top iron shell, 87: Large heavy machine, 88: Dome brick, 89: Existing deck

Claims (3)

It has an upright straight body part and a dome part connected to the straight body part via a conical part, and the outside is an iron skin with a lining brick inside, and a combustion chamber and heat storage A chamber is divided by partition bricks and arranged next to each other, and the combustion chamber and the heat storage chamber are connected to each other at the upper part.
After dismantling and removing the dome part and the conical part, the heavy machine for dismantling is moved on the heat storage bricks arranged in the heat storage chamber and on the grid-like fall prevention frame lid temporarily installed on the combustion chamber. While, the brick scraps dismantled with the demolition heavy machine falls and falls into the combustion chamber,
Further, the dismantling heavy machine for dismantling is supported by a wire with a balancer, one end of which is supported by a portal frame temporarily installed in the straight body part, and dismantling work is performed. . The internal combustion type hot stove dismantling method according to claim 1, wherein the portal frame is fixed to an iron skin that is sequentially cut down of the straight body portion. 3. The method of disassembling an internal combustion hot stove according to claim 1 or 2, wherein the portal frame is provided with lifting means for the fall-preventing frame lid, and when the combustion chamber is disassembled, the fall A method for disassembling an internal combustion type hot stove characterized by raising the prevention frame lid.

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