JP2019157183A - Method of disassembling burner part - Google Patents

Abstract

To perform the demolition of bricks at the bottom part of a combustion chamber of an external combustion stove in a short period of time.SOLUTION: A filling material 26 is filled in a first cavity 3C to which combustion air is supplied and in a second cavity 3D to which combustion gas is supplied. Thereafter, a heavy machine 12 is placed on a burner brick part 3B, and the bricks of the burner brick part 3B are disassembled by the heavy machine 12.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a method for dismantling a burner portion formed at the bottom of a combustion chamber of an external combustion type hot stove.

As a dismantling method of an external combustion type hot stove that sends hot air to a blast furnace, for example, there is a dismantling method described in Patent Document 1.
Patent Document 1 describes that, as a dismantling of an external combustion type hot stove, a heavy machine is thrown into the hot stove and a brick is demolished by the heavy machine.

JP-A-8-260011

However, when a heavy machine is placed directly on the burner brick portion when the burner portion at the bottom of the combustion chamber is disassembled, the brick in the burner brick portion may collapse because the lower portion is hollow.
For this reason, the present situation is that the brick demolition at the bottom of the combustion chamber has been performed manually.
Although a method of forming a temporary stage for placing a heavy machine on the outer periphery of the combustion chamber is also conceivable, it is necessary to form a temporary stage over the entire circumference of the combustion chamber, and as the brick is dismantled, Since it is necessary to change the height, there is a possibility of a large-scale temporary stage.

  The present invention has been made paying attention to the above points, and an object thereof is to perform brick dismantling at the bottom of a combustion chamber of an external combustion type hot stove in a short period of time.

  In order to solve the problem, according to one aspect of the present invention, after the filler is filled in the first cavity portion to which combustion air is supplied and the second cavity portion to which combustion gas is supplied, the burner brick portion is provided. The gist is to place a heavy machine on top and dismantle the bricks of the burner brick part by the heavy machine.

  According to one aspect of the present invention, a heavy machine can be safely placed on the burner part, and the brick of the burner brick part can be dismantled with the heavy machine. It is possible to safely and quickly disassemble bricks at the bottom of the combustion chamber.

It is a conceptual diagram explaining the disassembly of a straight body part. It is a figure which shows the process example of a burner brick part. It is a top view explaining an opening process. It is a side view explaining an opening process. It is a side view explaining an opening process. It is a side view explaining a filler injection | pouring process. It is a side view explaining the start state of a brick demolition process. It is a side view explaining the state of the latter half of a brick demolition process.

Next, embodiments of the present invention will be described with reference to the drawings.
The disassembly of the combustion chamber in the external combustion type hot stove of this embodiment is divided into disassembly of the dome and straight body portion of the combustion chamber, and disassembly of the burner portion at the bottom of the combustion chamber.
In this embodiment, a heavy machine is thrown into the combustion chamber, and the bricks in the combustion chamber are sequentially disassembled from the upper side by the heavy machine. Brick dismantled with heavy machinery is put into a collection container such as a back hopper that is suspended by a crane and carried into the combustion chamber, and then discharged.

<Disassembly of the dome and straight body of the combustion chamber>
In this embodiment, the case where the disassembly of the dome and the straight body portion of the combustion chamber is performed according to the disassembly method described in Patent Document 1 will be described as an example. In the present invention, as a method for disassembling the combustion chamber straight body portion, a known disassembly method may be adopted as appropriate, but it is preferable to apply a disassembly method according to the disassembly method described in Patent Document 1.
The dismantling of the dome of the combustion chamber is, for example, by installing an upper deck on the upper part of the combustion chamber straight body and closing it to prevent the brick from falling to the burner brick portion, while connecting the combustion chamber and the heat storage chamber or A heavy machine is lifted and placed on the upper deck by a crane. Then, the bricks of the dome are dismantled with a heavy machine, and the dismantled bricks are discharged by a collection container carried in with a crane.

As for the combustion chamber straight body 2, as shown in FIG. 1, a plurality of pin holes are formed along the circumferential direction at predetermined heights on the wall portion of the combustion chamber straight body 2 made of iron skin and brick. Then, the pin 10 is installed in the pin hole so as to protrude into the combustion chamber 1. Then, the in-furnace deck 11 lifted by a crane or the like is put into the combustion chamber 1 from above and supported by the pin 10 having a target height. A heavy machine 12 is placed on the in-furnace deck 11 and the bricks of the combustion chamber 1 are dismantled above the height of the in-furnace deck. The demolished brick is appropriately discharged by a collection container carried in with a crane.
By repeating this, the bricks of the combustion chamber straight body 2 are disassembled sequentially from the upper side.
Also, the iron skin that constitutes the wall portion of the combustion chamber straight body 2 where the brick dismantling is completed is also dismantled together with the brick of the combustion chamber straight body portion 2 or after the brick disassembly of the combustion chamber straight body portion 2.
By supporting the in-furnace deck on the wall portion of the combustion chamber straight body portion 2, the disassembly of the combustion chamber straight body portion 2 can be performed while protecting the burner brick portion.

<Disassembly of burner section 3 at the bottom of combustion chamber 1>
When the brick dismantling located above the burner unit 3 is completed, the burner unit 3 at the bottom of the combustion chamber 1 is dismantled.
Here, the burner unit 3 is arranged at a lower part of the burner brick unit 3B in which a passage through which combustion gas and combustion air can pass is formed upward and downward, and is supplied with combustion air. It has 1st cavity part 3C and 2nd cavity part 3D to which combustion gas is supplied (refer FIG. 4). The first cavity portion 3C and the second cavity portion 3D have wall surfaces formed by the bricks of the burner brick portion 3B, and through the passage formed in the burner brick portion 3B, combustion gas and combustion air enter the space of the straight body portion 2. Is to be supplied.
The first cavity portion 3C and the second cavity portion 3D are arch-shaped wall surfaces by the bricks of the burner brick portion 3B. However, the heavy machine 12 is placed directly on the burner brick portion 3B to dismantle the brick. If the process is performed, the cavities 3C and 3D may collapse. For this reason, in this embodiment, the hollow parts 3C and 3D are filled with a filler, and the top of the burner brick part 3B is used as a strong scaffold, so that the bricks at the bottom of the combustion chamber 1 by the heavy machine 12 can be disassembled. Is.
The dismantling of the burner unit 3 includes a filling step 20 and a brick dismantling step 21 as shown in FIG.

<Filling step 20>
The filling step 20 is a step of filling the first cavity 3C and the second cavity 3D with a filler.
The filling process 20 of the present embodiment includes an opening process 20A and a filler injection process 20B.

(Opening step 20A)
The opening step 20A is a step of opening through holes 24 penetrating from the upper surface of the burner brick portion 3B to the first cavity portion 3C and the second cavity portion 3D in the burner brick portion 3B.
First, as shown in FIGS. 3 and 4, a frame 22 is installed on the upper end of the wall 3 </ b> A at the bottom of the combustion chamber 1. The frame 22 is disposed in a direction along the facing direction of the first cavity 3C and the second cavity 3D when viewed from above. For example, H-shaped steel is used for the frame 22. In FIG. 3, the code | symbol 30 shows the formation position of a through-hole.

Next, the drilling machine 23 is supported on the frame 22 with the shaft up and down. And with the hole drilling machine 23, the through-hole 24 which penetrates the burner brick part 3B up and down is opened.
The penetrating position is a position overlapping with the ceiling surfaces of the first cavity 3C and the second cavity 3D in plan view. In this example, a case where two through holes 24 respectively communicating with the first cavity portion 3C and the second cavity portion 3D are opened is illustrated. It is preferable that the opening cross-sectional area of the through-hole 24 is larger than the opening cross-sectional area of the opening part of the channel | path opened to the upper end surface of the burner brick part 3B. The opening cross-sectional area of the through hole 24 is set to be larger than the diameter of the filler 26 to be filled.

In this embodiment, a granular material made of crushed stone having an average particle size of about 20 to 30 mm is used as the filler 26. Moreover, the opening part of the channel | path opened to the upper end surface of the burner brick part 3B was 130 mm x 280 mm. And the opening diameter of the through-hole 24 was 300 mmΦ.
The number of through holes 24 and the maximum opening diameter are designed in consideration of the strength of the burner brick portion 3B with respect to the dismantling work by the heavy machinery 12.

(Filler injection process 20B)
The filler injection step 20B is a step of pouring the filler 26 into the first cavity portion 3C and the second cavity portion 3D through the through hole 24.
First, as shown in FIG. 5, the pipes communicating with the first cavity 3C and the second cavity 3D are removed, and the sealing plates 25 are attached to the openings of the pipe communication paths 3E and 3F to be sealed.

Next, the filler 26 is put into the opening / closing hopper 29, the opening / closing hopper 29 is lifted and installed on each through hole 24, and the filling material 26 in the opening / closing hopper 29 is put into the through hole 24 as shown in FIG. Drop it.
By repeating this, the filler 26 is filled into the first cavity 3 </ b> C, the second cavity 3 </ b> D, and the through hole 24.
Note that high-pressure water may be appropriately injected into the through hole 24 so that the charged filler 26 spreads in the first cavity portion 3C and the second cavity portion 3D. In this case, the sealing plate 25 is preferably a mesh body or the like from which water can leak.

<Brick demolition process 21>
As shown in FIG. 7, the brick disassembling step 21 is a step of placing the heavy machine 12 on the burner brick part 3 </ b> B as shown in FIG. .
That is, the heavy machine 12 is lifted with a crane and placed on the burner brick portion 3B. And the brick of the burner brick part 3B and the brick of a wall surface are disassembled with the heavy machine 12, and the disassembled brick is discharged | emitted by the collection container 30 carried in with the crane. This is repeated, and the bricks of the burner brick portion 3B and the bricks on the wall surface are disassembled in order from the upper side to the lower side.

FIG. 8 shows a state in the latter stage of the brick dismantling process 21. In FIG. 8, the code | symbol 3G is the iron skin which comprised wall part 3A.
Here, although the granular material which consists of crushed stone etc. was illustrated as the filler 26 in the said description, the powder material may be sufficient as the filler 26. However, in consideration of discharge in the collection container 30, a granular material or a powdery material is preferable to a powdery material.
Moreover, concrete or mortar may be poured and filled as the filler 26, but considering the dismantling with the heavy machinery 12, a granular material is preferable.

Moreover, in the said embodiment, although the through-hole 24 is opened and the filler 26 is filled into the 1st cavity part 3C and the 2nd cavity part 3D through the through-hole 24, it is in the burner brick part 3B. You may make it fill the 1st cavity part 3C and 2nd cavity part 3D with the filler 26 through the formed channel | path. However, it is possible to more reliably fill the filler 26 through the through-hole 24 that extends vertically in the vertical direction.
In the above description, the filling material 26 is also filled in the through hole 24, but the filling material 26 may not be completely filled in the through hole 24.
Further, if the filler 26 is in a fluid state close to a liquid such as concrete or mortar at the time of injection, the filler 26 may be press-fitted and filled from the pipe communication paths 3E and 3F.

  As described above, in the present embodiment, the heavy machine 12 is safely placed on the burner unit 3 and the bricks of the burner brick unit 3B can be dismantled by the heavy machine 12, so that when performing manually. In comparison, the brick dismantling at the bottom of the combustion chamber 1 of the external combustion type hot stove can be performed safely and in a short time.

DESCRIPTION OF SYMBOLS 1 Combustion chamber 2 Straight trunk | drum 3 Burner part 3A Wall part 3B Burner brick part 3C 1st cavity part 3D 2nd cavity part 3E, 3F Communication path 3G Iron skin 10 Pin 11 Furnace deck 12 Heavy machine 20 Filling process 20A Open Hole process 20B Filler injection process 21 Brick dismantling process 22 Frame 23 Drilling machine 24 Through hole 25 Sealing plate 26 Filler 30 Collection container

Claims (3)

A burner brick part in which a passage through which combustion gas and combustion air can pass is formed, a first cavity part to which combustion air is supplied and a second gas gas to which combustion gas is supplied are arranged below the burner brick part. A burner part having a cavity part of the combustion chamber is formed at the bottom of the combustion chamber, the dismantling method of the burner part in the external combustion hot stove,
A filling step of filling the first cavity and the second cavity with a filler;
After the filling step, placing a heavy machine on the burner brick portion, a brick dismantling step of dismantling the brick of the burner brick portion by the heavy machinery,
A method for disassembling a burner section characterized by comprising:   The burner part disassembling method according to claim 1, wherein the filler is made of at least one of a granular material and a powdery material. The filling step is
For the burner brick portion, an opening step of opening through holes penetrating from the upper surface of the burner brick portion to the first cavity portion and the second cavity portion, and
A filler injection step of pouring the filler into the first cavity and the second cavity through the through hole, and the burner part according to claim 1 or 2, Dismantling method.

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