JP2000328815A - Chimney demolishing method, and method and device for washing inside of flue - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chimney demolishing method, and a method and a device for washing the inside of a flue in a plant or an incineration field treating a harmful substance or the like. SOLUTION: A filler injection means is inserted into a space formed between an external cylinder 3 and a fire brick wall 4, the inside of the space is filled with foamed mortar and the fire brick wall 4 and the external cylinder 3 are fixed mutually, and a remotely controllable in-chimney washing means is inserted into a flue 6 and the inside of the flue 6 is interrupted from peripheral environment and ash by combustion adhesion is removed from the internal side face of the flue 6. A chimney 1 is cut by a cutting means and movable cut sections are formed, the cut sections are moved into a sealed work section and divided into small pieces by remote control and chimney demolishing waste is obtained, and the chimney demolishing waste is discarded depending on the degree of contamination.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the dismantling of incineration plants, and more particularly, to a method for dismantling a chimney, a method for cleaning in a flue, and a device for cleaning in a flue of a plant or incineration plant handling harmful substances and the like.

[0002]

2. Description of the Related Art When dismantling a plant or an incineration plant that handles hazardous substances, the hazardous substances still remain in the plant even after the operation is stopped. Therefore, when a plant or an incineration plant is dismantled or collected, it is a problem that harmful substances pollute the human body, and pollutants scatter to the surrounding environment to pollute the environment. Operations such as cleaning the inside of the plant with human hands are extremely dangerous. In addition, in a plant contaminated with such a high concentration, especially the chimney from which combustion products are discharged, the pollution state is poor, and the chimney itself has a high altitude, so the harmful polluted surroundings when dismantling. Substances are easily scattered, and when dismantling, it is necessary to pay close attention to the working environment and surrounding environment.

Conventionally, when dismantling such a chimney,
The chimneys are dismantled by laying down or cut into short lengths, and the chimneys are cut down from the top to the bottom without turning over. At that time, there is a problem that harmful substances are scattered in the air and pollute the surrounding environment. In addition, fire chimneys usually have a refractory brick lined inside the outer cylinder, and when dismantled, bricks contaminated with harmful substances fall from the top of the chimney and scatter, causing contaminants in the surrounding environment, There is also a problem that it involves danger to workers.

Conventionally, when disassembling a chimney having such a refractory brick, (1) the refractory brick is first removed.
(2) A method of removing, decomposing, fixing, and cleaning harmful substances of the refractory brick, and (3) fixing the refractory brick to the outer cylinder and dismantling the outer cylinder and the refractory brick simultaneously. However, as described above, the interior of the chimney is highly contaminated, and especially the refractory bricks define the flue, so the degree of contamination is severe. Falls and contaminates the surrounding environment, and workers must handle highly contaminated bricks, and the impact on the surrounding environment cannot be ignored. In addition, there is a problem that the influence on the worker cannot be ignored in the work environment. Also,
In the above-described method of cleaning the inside of the chimney prior to the chimney disassembly, the chimney is disassembled after cleaning, so that the influence on the surrounding environment due to the fall of bricks and the like can be reduced. Since it is necessary to enter the inside to perform work, it is not preferable in terms of work environment. In addition, when washed by an operator, unwashed bricks fall and contaminate the surrounding environment, and there are many problems in the working environment. Even when the firebrick is fixed to the outer cylinder and dismantled, the work environment is similarly undesired, and it is necessary to consider the surrounding environment separately.

[0005] In addition, when manually removing equipment such as a chimney that has been contaminated by high-concentration dioxin or the like as in the past, special work clothes for preventing contamination are required, or breathing is performed. It becomes necessary to supply an air cylinder or separate air. In addition, there are many parts that workers cannot easily enter,
This increases the risk. On the one hand, work clothes and equipment contaminated by the work are not suitable for re-use and must be discarded and, even with the protection described above, protect workers completely from contamination. It is difficult.

[0006] For the above reasons, it is not preferable in terms of the working environment for the worker to enter the flue and work, and it is necessary to minimize the contamination of the surrounding environment when dismantling the same.

[0007] Therefore, in the past, when dismantling a chimney provided in an incineration plant or the like, it has been necessary to clean the inside of the flue by unmanning it so as not to pollute the surrounding environment and to accept the work environment. There has been a demand for an efficient and efficient dismantling method, a method for cleaning the flue, and a device for cleaning the flue.

[0008]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and has greatly improved the working environment.
An object of the present invention is to provide a method for dismantling a chimney of an incineration plant and the like, a method for cleaning the inside of a stack, and a device for cleaning the inside of the stack, which minimize the influence on the surrounding environment.

[0009]

According to the first aspect of the present invention, there is provided an outer cylinder extending vertically from a foundation to a top, and a radially inwardly spaced apart circumferentially extending along the outer cylinder. In the method of dismantling a chimney having a refractory brick wall that forms a space between the outer cylinder and the inner surface and defines a flue,
After inserting the filler injecting means into the space, the space is filled with foaming mortar to fix the refractory brick and the outer cylinder to each other, and a remotely controllable in-flue washing means is inserted into the flue, and The inside of the flue is cut off from the surrounding environment to remove burnt ash from the inner surface of the flue, and the chimney is cut by a cutting means to form a movable cut portion, and the cut portion is moved to a closed work space. A chimney dismantling method is provided, wherein the chimney dismantling waste is divided into small pieces by remote control, and the chimney dismantling waste is discarded according to the degree of contamination.

According to the invention of claim 2 of the present invention, the cleaning means in the flue is vertically movable and includes high-pressure air blowing means, and the high-pressure air blowing means is adapted to supply high-pressure air in the flue. A chimney dismantling method is provided, in which the combustion ash is removed from the inner surface of the flue by being ejected to the side surface and rotated.

According to a third aspect of the present invention, there is provided a chimney dismantling method in which the high-pressure air jetting means is driven by an air motor disposed at the center of the high-pressure air jetting means.

According to a fourth aspect of the present invention, there is provided a chimney dismantling method, wherein the cutting means comprises a driving means movable in a horizontal direction with respect to the chimney.

According to a fifth aspect of the present invention, there is provided a chimney dismantling method, wherein the cutting means cuts the chimney inside a temporary enclosure provided around the chimney.

According to the invention of claim 6 of the present invention, the combustion ash is removed by connecting high pressure air from the high pressure air discharging means to an opening formed at a predetermined position below the chimney. A chimney dismantling method is provided, wherein the method is performed while suction is performed by suction means provided with a filter means for capturing the burnt ash.

According to the invention of claim 7 of the present invention, the outer cylinder extending vertically from the foundation to the top and the outer cylinder extending radially inward along the outer cylinder and extending in the circumferential direction are separated from the outer cylinder. A method for cleaning a chimney with a refractory brick wall having a space therebetween and a refractory brick wall having an inner surface defining a flue, the method comprising: a remotely controllable cleaning of the flue comprising a rotatable high-pressure air jetting means. Inserting the means into the flue, isolating the inside of the flue from the surrounding environment, blowing high-pressure air to the inside of the flue and rotating the high-pressure air blowing means along the circumferential direction of the inside of the flue;
A filter for removing the combustion ash from the inner surface of the flue by moving the flue washing means in the vertical direction of the chimney and capturing the combustion ash connected to an opening formed on the lower side of the chimney. A method for cleaning the inside of a flue is provided, which comprises suctioning by suction means comprising means.

According to an eighth aspect of the present invention, there is provided a method for cleaning the inside of a flue, characterized in that the high-pressure air ejecting means is driven by an air motor disposed at the center of the high-pressure air ejecting means. You.

According to the ninth aspect of the present invention, an upper support and a lower support inserted into the flue and disposed concentrically with the center axis of the chimney, the upper support and the lower support A high-pressure air ejection member mounted concentrically between the bodies and rotatable by high-pressure air supplied from a high-pressure air supply member, and one end movably mounted on the upper support and adjacent to the other side of the flue inner surface at the other end A plurality of upper support members having a rotating member and axially symmetrically attached to the upper support; and suspending the upper support, the lower support, and the high-pressure air ejecting member integrally so as to be vertically movable. A mounting member provided on the upper support for mounting the moving means, and a rotating member having one end movably mounted on the lower support and adjoining the inner surface of the flue at the other end. Multiple undersides mounted on side supports And a plurality of pressing members, one end of which is attached to the lower support and the other end is connected to the lower support, for pressing the lower support against the inner surface of the flue. Cleaning the inner surface of the flue vertically and circumferentially by removing the combustion ash by being vertically moved by the moving means and ejecting the high-pressure air from the high-pressure air ejection member. An apparatus for cleaning in-flue is provided.

According to the tenth aspect of the present invention, the rotating member provided on the upper supporting member and the lower supporting member guides the cleaning device in the flue in the vertical direction of the chimney. There is provided an in-flue washing apparatus characterized by being a roller.

According to an eleventh aspect of the present invention, the high-pressure air ejection member includes a center air motor that is rotatably supported by the high-pressure air introduced therein, and the high-pressure air ejection member is axially symmetrically mounted on the center air motor. A communication member for supplying air to the inner surface of the flue; a guide member provided at an end of the communication member adjacent to the inner surface of the flue; and a guide member pressed against the inner surface of the flue by the elasticity of the communication member; And an air nozzle provided on the side facing the inner surface of the flue to inject the high-pressure air to the inner surface of the flue.

FIG. 1 shows a chimney 1 of an incineration plant or the like to be dismantled by the chimney dismantling method of the present invention. A chimney 1 includes an outer cylinder 3 extending vertically from a foundation 2 buried in the ground to the top, a refractory brick wall 4 disposed radially inside the outer cylinder 3 and formed of refractory bricks,
And a chimney port 5 provided below the chimney.
The flue port 5 is formed so that the outer cylinder 3 and the refractory brick wall 4 protrude in the horizontal direction, and communicates with the flue 6. The outer cylinder 3
RC, often made of reinforced concrete (RC)
A space 7 is provided between the wall 4 and the refractory brick wall 4 formed of the refractory brick, so that heat by the combustion gas is not directly transmitted to the RC wall.

According to the chimney dismantling method of the present invention, the inside of the stack of the chimney is cleaned by unmanned construction in a sealed state, and the chimney is unmanned by remote control following the static large-scale process without turning over the stack. It is characterized in that a subdivision step is performed. Hereinafter, components and devices used in the unmanned construction of the present invention will be described.

FIG. 2 shows that the chimney 1 shown in FIG. 1 is subjected to an unmanned cleaning step in the chimney dismantling method of the present invention. It is shown that a dust collector 8 is disposed and sealed at the flue port 5, and a sealing cover 9 for sealing the top is disposed at the top of the flue 1. In this way, the chimney 1 is sealed from the surrounding environment and the stack 6
By cleaning the inside, it is possible to perform the chimney dismantling work without emitting the burnt ash inside the flue 6 to the surrounding environment and without polluting the workers.

FIG. 2 shows a flue gas cleaning device 11 for cleaning the inner surface 10 of the flue by blowing air into the flue 6 with high-pressure air, and the flue cleaning device 11 is movably suspended in the vertical direction. Winch 12 for lowering, high-pressure air supply member 13 for supplying high-pressure air to cleaning device 11 in the flue, and compressor 1 for generating high-pressure air
4 and 4 are shown.

The in-flue washing apparatus 11 is suspended from the winch 12 to the middle of the chimney 1 by suspending means such as a wire 15, and further connected to a high-pressure air supply member 13 to which high-pressure air from a compressor 14 is supplied. Have been. The high-pressure air supply member 13 is a flexible hose that can sufficiently withstand the pressure of the high-pressure air, and follows the movement of the in-flue cleaning device 11 that is vertically moved by the winch 12. The rigidity of this hose,
The inner diameter and the like can be appropriately selected so as to be adapted to the required flexibility of the hose and the required high-pressure air supply amount and the like.

FIG. 3 shows a chimney cleaning device 1 which cuts a chimney along a cutting line AA in FIG.
1 is a diagram showing a cross section of a chimney 1; Chimney 1 is RC
With the outer cylinder 3 made of
A space 7 for heat insulation and an outer cylinder 3 formed of firebricks
And a refractory brick wall 4 that is spaced radially inward from the wall to form the above-described space 7. It is shown that this space 7 is filled with lightweight foam mortar by a process described later. The inner surface of the refractory brick wall 4 is a flue inner surface 10 that forms the flue 6. On the inner surface 10 of the flue, burnt ash has been deposited over a long period of use, and this burnt ash contains high levels of harmful components such as dioxin, which are released to the surrounding environment and which workers do not want to come into contact with. Contained in concentration.

The in-flue washing apparatus 11 shown in FIG. 2 and shown in more detail in FIG. 3 allows a worker to operate the inside of the flue 6 under the above-mentioned poor environment by remote control.
It is designed to be cleaned without entering the interior and working.

In FIG. 3, high-pressure air is applied to the inner side 1 of the flue.
In order to clearly show the high-pressure air jetting device 17 used as high-pressure air jetting means for jetting to zero, an upper support 16 described later is omitted. The center of the high-pressure air ejection device 17 is concentric with the center of the flue 6, so that the operation of the in-flue cleaning device 11 can be performed smoothly and uniform cleaning can be performed. This high pressure air ejection device 1
The center of 7 is rotatably supported at the center of the lower support 18 and is provided with a high-pressure air inlet 19 to form an air motor 17 '.

A spring pipe 20 through which high-pressure air is passed extends from the center of the high-pressure air ejection device 17 so as to approach the inner surface 10 of the flue radially outward. The pipe 20 is arranged symmetrically about the central axis so that the pressure of the high-pressure air acts uniformly. In FIG. 3, the number of the pipes 20 is three, but the number can be changed as appropriate in order to obtain an appropriate cleaning effect and operation of the in-flue cleaning apparatus 11. The end of the pipe 20 also has a flue inner surface 1
A guide member 21 such as a roller that rotates in the circumferential direction and is adjacent to 0 is provided. The guide member 21 presses the roller 21 against the inner surface 10 of the flue by the elasticity of the pipe 20 formed in the shape of a spring pipe, and keeps a constant distance between the high-pressure air nozzle described later and the inner surface 10 of the flue. The pipe 20 is provided with an air nozzle 22 at a position facing the rotation center from the roller 21 and facing the inner surface 10 of the flue, and the high pressure air supplied from the compressor 14 is supplied to the inner surface 10 of the flue. The inside of the flue 10 can be washed by being blown out toward the inside.

FIG. 4 is a diagram showing the chimney cleaning device 11 of the present invention when the chimney 1 is cut away along the cutting line BB in FIG. 3 and viewed from the direction of the arrow C in the drawing. The flue cleaning device 11 of the present invention includes an upper support 16, a high-pressure air ejection device 17, and a lower support 18. The high-pressure air ejection device 17 includes an upper support 16 and a lower support 18. The air swivel 23 is disposed between them. The air hose 13 is connected to the air swivel 23, and when high-pressure air is introduced from the compressor 14, the high-pressure air ejection device 17 is rotated by the supplied high-pressure air.

The upper support 16 is provided with upper support members 24a, 24a symmetrically disposed about the central axis and projecting upward.
One end of b is movably mounted. Rotary members 25a and 25b such as guide rollers are provided at the other ends of the upper support members 24a and 24b, and the rotary members 25a and 25b of the upper support members 24a and 24b abut against the inner surface 10 of the flue by a spring. ing.

One end of lower support members 26a and 26b, which are symmetrically disposed about the central axis and project downward, are movably attached to the lower support 18 shown in FIG.
Rotary members 27a and 27b such as guide rollers are provided at the other ends of the lower support members 26a and 26b. The guide rollers 2 of the lower support members 26a, 26b
7a and 27b are pressing members which are attached to the lower portion of the lower support 18 and extend toward the inner surface 10 of the flue and whose ends are connected to the lower portions of the lower supporting members 26a and 26b.
For example, it is pressed by the air cylinders 28a and 28b so as to be adjacent to the inner surface 10 of the flue. By pressing the guide rollers 27a and 27b toward the inner surface 10 of the flue in this way, the arrangement of the cleaning device 11 in the flue together with the upper supporting members 24a and 24b in the flue 6 is stabilized.
The cleaning device 11 in the flue itself is prevented from rotating by the reaction of the rotation of the high-pressure air ejection device 17.
Further, FIG. 4 shows that the in-flue cleaning apparatus 11 is suspended by the wire 15 via the mounting member 29.

In the unmanned subdivision step of the present invention, a pulverizing means such as a backhoe which can be remotely operated is used. This will be described in more detail later with reference to FIG.

FIG. 5 is a diagram showing a flowchart of a chimney dismantling method for an incineration plant or the like according to the present invention. The chimney dismantling method of the present invention starts from step 101, and then,
In preparation for the step 102, the compressor 14, the dust collector 8, the equipment for filling the foam 7 with the foam mortar in the chimney 1 as will be described later, and the unnecessary materials around the chimney 1 are removed. Preparation work such as is carried out.

Next, the disassembly method of the present invention comprises the steps 1
At 05, the process proceeds to a filler injection step of injecting a filler for fixing the outer cylinder 3 and the refractory brick wall 4 so that the refractory brick forming the refractory brick wall 4 does not drop during the dismantling step. By the filler injecting step of this step 105, the space 7 between the outer cylinder 3 and the refractory brick wall 4 is filled with the filler, specifically, step 10
3 and the light-weight foamed mortar prepared in step 104 is filled, and in the contaminated brick washing step 106 and the subsequent short cutting step 107, the refractory brick is prevented from dropping, and the safety of work is ensured. It is possible to minimize the contamination of the surrounding environment due to the falling of water.
This step 105 will be described in detail with reference to FIG.

FIG. 6 is a diagram showing in detail the filler filling step in step 105 of the present invention. The chimney 1 shown in FIG. 6 has a vertically extending R from a foundation buried underground.
And an outer cylinder 3 made of C and a refractory brick wall 4 formed of a refractory brick formed along the outer cylinder 3 so as to be spaced radially inward from the outer cylinder and forming a space 7 with the outer cylinder 3. And is formed from. In FIG. 6, for convenience of explanation, unnecessary members are omitted and the space 7 is shown in an enlarged manner.

The filler filling step shown in step 105 includes:
First, the process starts by securing the opening 31 in a portion corresponding to the space 7 at the top of the chimney. The opening 31 is used for inserting a filler injecting means 32 for introducing a filler such as foam mortar. As the filler injection means 32, specifically, a filler such as a pipe, a tube, or a hose can be appropriately supplied.
3, any member can be used as long as it is a member having a thickness and flexibility capable of connecting between the members. In FIG.
Although the above-mentioned openings 31 are provided at two places and two filler injecting means 32 are shown to be used, in the present invention, the number is such that the space 7 is lightened in a proper time. One or more than two fillers may be used as long as they can be filled with a filler such as foam mortar.

After securing the opening 31, the filler filling means 32 is inserted into the space 7 from the opening 31. At this time, the insertion is performed until the tip of the filler injecting means 32 is substantially at the level of the ground. In this manner, the lightweight foam mortar used for reducing the weight of the cut portion in the cutting portion moving step in step 108 described later and for reducing the cost is provided at the lower portion of the chimney, particularly at the portion exposed from the ground surface. In this case, filling can be performed without gaps, and the subsequent cutting process can be made more reliable and more efficient.

Next, the foaming agent is mixed with the mortar prepared in advance by the filling plant 34 by the foaming agent mixer 35 to prepare a lightweight foamed mortar filler. Examples of such mortar include, for example, cellular mortar of Onoda Chemiko Co., Ltd., but if the object of the present invention can be achieved, lightweight mortar, foamed mortar, lightweight concrete, etc., or any other than these Even fillers can be used as appropriate. The lightweight foam mortar mixed with the foaming agent is pressure-fed into the space 7 through the filler injecting means 32 by a filling pump to perform filling.
In FIG. 6 the already filled lightweight foam mortar part 36
Is schematically shown. When the filling of the lightweight foam mortar as the filling material is performed to the top of the chimney 1, the filling pump 3
Stop 3 to stop filling. Thereafter, by solidifying the lightweight foam mortar, the outer cylinder 3 and the refractory brick wall 4 are firmly fixed, and it is possible to prevent the adverse effects such as falling off of the brick. In addition, the filler injecting means 32 may be extracted after filling the lightweight foam mortar as necessary, or may be left as it is until the lightweight foam mortar is solidified, and together with the outer cylinder 3 and the like in a short cutting step of step 107 described later. It is also possible to cut it.

Next, the disassembly method of the present invention comprises the step 10
Move on to step 6 for cleaning the contaminated brick. This step will be described with reference to FIG. 2. The stack 30 for installing the in-flue washing device is installed on the outer cylinder 3 of the chimney, and the winch 12 for the in-flue washing device 11 is arranged. Next, the dust collector 8 is connected to the flue port 5 through the ventilation pipe 8a, and the flue port 5 is sealed. Next, the in-flue washing device 11 connected to the wire 15 of the winch 12 is introduced into the flue 6. Next, the top of the chimney is closed by the sealing cover 9 to block the inside of the flue from the surrounding environment. By doing so, the flue 6
Internal pollutants are discharged to the surrounding environment,
The possibility of contaminating workers can be minimized. Next, the compressor 14 is activated to send high-pressure air to the flue-washing device 11, blow high-pressure air from the high-pressure air nozzle 22 of the flue-washing device 11, rotate the high-pressure air blowing device 17, and burn and adhere in the circumferential direction. Perform ash cleaning. Simultaneously with the start of the supply of the high-pressure air to the above-described flue gas cleaning device 11, the dust collector 8
Is started, and the combustion ash separated from the inner surface 10 of the flue by the cleaning is sucked. In this way, at the same time as cleaning the flue, the air flow containing the contaminated combustion ash flows in the direction of arrow D in FIG. 2 to collect the combustion ash. It becomes possible. When the above-described stack cleaning device 11 finishes the cleaning of the combustion adhesion ash in the circumferential direction, the stack cleaning device 11 is sequentially moved to the lower side of the chimney by driving the winch 12 by remote control. Of the inner surface in the circumferential direction and the vertical direction is performed by an unmanned construction process using remote control. Note that the dust collector 8 described above is provided with a filter sufficient to trap combustion ash.

Cleaning of the interior of the stack 6 by the unmanned construction of the present invention is performed after the filling step of the lightweight foam mortar described later in the chimney dismantling method using the rotary air jet cleaning machine described above. This is preferable in that it does not collapse during washing. However, in the present invention, the above-described contaminated brick cleaning step 106 is described as being performed after the filler filling step 105. However, in the case where it is known in advance that the strength of the refractory brick wall 4 is sufficient. Before the filling material injection step 105, the contaminated brick cleaning step 1
06 can also be performed.

Next, in the chimney dismantling method of the present invention, the process proceeds to a short cutting step of step 107. This step is a step that enables static dismantling of the chimney without causing pollution to the surrounding environment such as turning the chimney down. This short cutting process will be described with reference to FIG. First, in the short cutting process of step 107, the work scaffolds 37a and 37b are temporarily provided near the chimney. Next, a temporary enclosure 38 is temporarily provided around the work scaffolds 37a and 37b from the ground GL. The temporary enclosure 38 is arranged to further prevent contamination of the surrounding environment and workers due to generation of dust during the short cutting process. In addition, it is preferable that the temporary enclosure 38 be higher than the heights of the work scaffolds 37a and 37b and the chimney 1 from the viewpoint of more reliably preventing contamination.

Next, in the short cutting step 107, the chimney 1 is cut by a wire saw method as shown in FIG. In this short cutting step 107, as shown in FIG. 8, the wire saw 40 extended from the ground via the guide pulley 39 is wrapped around the outer cylinder 3 of the chimney, and the driving device 41 drives the wire saw 40 in a circular manner to drive the chimney. Cut 1 In the present invention, a blade-type concrete cutter can be used as appropriate.

In FIG. 8, the wire saw means 40 is R
The C-structure, specifically the chimney 1, is shown connected to a drive 41 by a plurality of guide pulley means 39. The driving device 41 is mounted on a moving device 42 installed on the ground. The moving device 42 is configured to be able to move in a horizontal direction with respect to the RC structure such as the chimney 1, so that the cutting load applied to the wire saw means 40 is variable, and the RC The structure can be continuously cut with an appropriate cutting load from a direction opposite to the side where the driving device 41 and the moving device 42 are arranged. As the driving device 41 and the moving device 42, any device can be used as long as it can apply an appropriate torque and can move the driving device 41 so that an appropriate cutting load can be applied.

Next, in the chimney dismantling method of the present invention, the process proceeds to a cutting part moving step of Step 108. This cutting part moving step is a step of moving the cut part 43 of the chimney 1 cut short to a work chamber for further disassembly. In this step, since the foamed mortar refractory brick wall 4 has already been fixed to the outer cylinder 3 in the filler filling step in step 105, it can be efficiently performed without causing a problem such as detachment of the brick.

Referring to FIG. 7, this cutting portion moving step 108
Will be described. In the cutting section moving step 108, first, a wire is laid over the washing machine installation base 30 installed on the top of the largely divided portion 43 of the chimney 1, and is indicated by an arrow E in FIG. As described above, the cut portion 43 is moved in the vertical direction, raised to exceed the work scaffolds 37a and 37b and the temporary enclosure 38, and, for example, placed on the ground once, and then moved to the rear split work chamber in another process. Alternatively, the roof portion of the subdivision work room may be opened and closed so that it can be moved directly from the crane to the subdivision work room. During the short cutting process at step 107 and the cutting portion moving process at step 108, it is preferable that the dust collector 8 is always activated so that the contaminated dust is not scattered to the surrounding environment. By doing so, contamination to the surrounding environment can be prevented.

Next, the chimney dismantling method of the present invention shifts to the dismantling step of step 109 shown in FIG. 9, that is, the small splitting step. In the small splitting process of step 109, the cut portion 43 of the chimney 1 is moved to the small splitting working room 44 which is cut off from the surrounding environment, and then the wireless operation is performed from the operating room 45 away from the small splitting working room. A work machine such as a radio-controlled backhoe that is remotely operated is used. In the operation at this time, the operation room 4 provided in the non-contaminated area
The backhoe is operated by the operation panel while watching the monitor of No. 5. An in-vehicle camera is attached to the backhoe,
It is possible to perform unmanned construction by remote control in subdivision work as if actually driving a backhoe. A dust collector 46 is also attached to the small work chamber 44 so as not to pollute the surrounding environment.

Next, the chimney dismantling method of the present invention proceeds to a waste disposal step of step 110. In this waste disposal process, uncontaminated RC walls are taken out of the workplace, and highly contaminated refractory bricks are separately drum-packed and stored inside another building. It is preferable to perform an appropriate treatment.

Further, the remaining portion of the chimney 1 is dismantled by newly attaching a crane lifting member to the outer cylinder 3 and repeating the above steps 107 to 110. When the chimney disassembly method of the present invention is completed in this way, the above-ground portion of the chimney 1 can be disassembled without contaminating the surrounding environment.

Further, in the present invention, in order to further reduce the contamination if necessary, it is possible to remove the surface portion of the chimney 1 in advance by a step such as filing and then perform the above-described disassembly method.

[0049]

According to the first aspect of the present invention, an outer cylinder extending vertically from the foundation to the top and the outer cylinder extending radially inward along the outer cylinder and extending in the circumferential direction. In a method of dismantling a chimney having a refractory brick wall in which a space is formed between the inner surfaces and a flue is defined, a foam mortar is filled in the space after inserting a filler injection means into the space. Then, the refractory brick and the outer cylinder are fixed to each other, and a remotely operable cleaning means in the flue is inserted into the flue to cut off the flue from the surrounding environment and remove the burnt ash from the inner surface of the flue. The cutting means cuts the chimney to form a movable cutting part, moves the cutting part to a sealed work space, and divides it into small pieces by remote control to obtain chimney dismantling waste, Including disposing of the chimney demolition waste according to Since the chimney dismantling method is provided, the part contaminated by contaminants such as dioxin is completely sealed from the surrounding environment, combustion ash is removed before decomposition work, and the chimney is cut by cutting means without falling down the chimney. A chimney dismantling method that can remotely perform processes such as statically dividing large parts into parts can be provided, so that pollutants such as dioxin are not scattered in the surrounding environment so that the surrounding environment is not polluted and work clothes etc. Since the generation of new pollutants can be prevented and the work in the polluted environment is performed using a remotely operated device, a chimney dismantling method having an unmanned construction process excellent in the work environment can be provided.

According to the invention of claim 2 of the present invention, the cleaning means in the flue is vertically movable and includes high-pressure air blowing means, and the high-pressure air blowing means is adapted to supply high-pressure air to the inside of the flue. A chimney dismantling method is provided which removes the combustion adhesion ash from the inner surface of the flue by ejecting to the side and rotating the chimney, so that a chimney dismantling method having an unmanned construction process excellent in working environment is provided. Can be provided.

According to the third aspect of the present invention, the high-pressure air ejection means is provided with a chimney dismantling method driven by an air motor disposed at the center of the high-pressure air ejection means. A chimney dismantling method having an excellent unmanned construction process can be provided.

According to a fourth aspect of the present invention, there is provided a chimney dismantling method characterized in that the cutting means includes a driving means movable in a horizontal direction with respect to the chimney. It is possible to provide a chimney dismantling method capable of efficiently cleaning the inner side of the road and thereby enabling unmanned construction with an excellent work environment.

According to the invention of claim 5 of the present invention, there is provided a chimney dismantling method characterized in that the cutting means cuts the chimney inside a temporary enclosure provided around the chimney. In addition, it is possible to provide a chimney dismantling method which can dismantle static chimneys and does not pollute the surrounding environment.

According to the invention of claim 6 of the present invention, the combustion adhering ash is connected to an opening formed below the chimney while ejecting high pressure air from the high pressure air ejection means. A chimney dismantling method characterized in that the method is performed while suction is performed by suction means provided with a filter means for trapping combustion ash, so that a chimney dismantling method excellent in working environment and not polluting the surrounding environment can be provided.

According to the seventh aspect of the present invention, the outer cylinder extending vertically from the foundation to the top and the outer cylinder extending radially inward along the outer cylinder and extending in the circumferential direction are separated from the outer cylinder. A method for cleaning a chimney with a refractory brick wall having a space therebetween and a refractory brick wall having an inner surface defining a flue, the method comprising: a remotely controllable cleaning of the flue comprising a rotatable high-pressure air jetting means. Inserting the means into the flue, isolating the inside of the flue from the surrounding environment, blowing high-pressure air to the inside of the flue and rotating the high-pressure air blowing means along the circumferential direction of the inside of the flue;
By moving the flue washing means in the vertical direction of the chimney, the burnt ash is removed from the inner surface of the flue and the burnt ash connected to an opening formed at a predetermined position below the chimney is captured. Since the method for cleaning the inside of the flue is characterized in that the suction is provided by the suction means provided with the filter means, the method for cleaning the inside of the flue can be provided which is excellent in working environment and can be carried out unattended.

According to an eighth aspect of the present invention, there is provided a method for cleaning the inside of a flue, characterized in that the high-pressure air jetting means is driven by an air motor 17 'disposed at the center of the high-pressure air jetting means. Therefore, it is possible to provide a method for cleaning the inside of a flue, which is excellent in working environment and capable of unmanned construction.

According to the ninth aspect of the present invention, the upper support and the lower support inserted into the flue and disposed concentrically with the center axis of the chimney, the upper support and the lower support A high-pressure air ejection member mounted concentrically between the bodies and rotatable by high-pressure air supplied from a high-pressure air supply member, and one end movably mounted on the upper support and adjacent to the other side of the flue inner surface at the other end A plurality of upper support members having a rotating member and axially symmetrically attached to the upper support; and suspending the upper support, the lower support, and the high-pressure air ejecting member integrally so as to be vertically movable. A mounting member provided on the upper support for mounting the moving means, and a rotating member having one end movably mounted on the lower support and adjoining the inner surface of the flue at the other end. Multiple undersides mounted on side supports And a plurality of pressing members, one end of which is attached to the lower support and the other end is connected to the lower support, for pressing the lower support against the inner surface of the flue. Cleaning the inner surface of the flue vertically and circumferentially by removing the combustion ash by being vertically moved by the moving means and ejecting the high-pressure air from the high-pressure air ejection member. Thus, the inside of the flue can be unmanned, and the inside of the flue can be provided with an excellent work environment.

According to the tenth aspect of the present invention, the rotating member provided on the upper supporting member and the lower supporting member is a guide for guiding the in-flue washing device in a vertical direction of the chimney. Since the flue cleaning device characterized by being a roller is provided, a highly efficient flue cleaning device excellent in working environment can be provided.

According to the eleventh aspect of the present invention, the high-pressure air ejecting member includes a center air motor that is rotatably supported by the high-pressure air introduced therein, and the high-pressure air ejecting member is axially symmetrically mounted on the center air motor. A communication member for supplying air to the inner surface of the flue; a guide member provided at an end of the communication member adjacent to the inner surface of the flue; and a guide member pressed against the inner surface of the flue by the elasticity of the communication member; And an air nozzle provided on the side facing the inner surface of the flue and injecting the high-pressure air to the inner surface of the flue. In addition to being able to clean, the inside of the flue can be unmanned and constructed, and a flue cleaning apparatus with excellent working environment can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a chimney to be dismantled according to the present invention.

FIG. 2 is a diagram showing a flue cleaning process of the present invention.

FIG. 3 is an exploded top view of the flue cleaning apparatus of the present invention.

FIG. 4 is a side view of the flue cleaning apparatus of the present invention.

FIG. 5 is a flowchart showing a chimney dismantling method of the present invention.

FIG. 6 is a view showing a filler filling step used in the chimney dismantling method of the present invention.

FIG. 7 is a view showing a short cutting step used in the chimney dismantling method of the present invention.

FIG. 8 is a diagram showing a wire saw used in the present invention.

FIG. 9 is a schematic view showing a small splitting step in the disassembly method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Chimney 2 ... Foundation 3 ... Outer cylinder 4 ... Refractory brick wall 5 ... Flue mouth 6 ... Flue 7 ... Space 8 ... Dust collector 8a ... Ventilation pipe 9 ... Sealing cover 10 ... Inner side of flue 11 ... Cleaning device in flue 12 ... Winch 13 ... High-pressure air supply member 14 ... Compressor 15 ... Wire 16 ... Upper support member 17 ... High-pressure air ejection device 17 '... Air motor 18 ... Lower support 19 ... High-pressure air inlet 20 ... Spring pipe 21 ... Roller 22 ... Air nozzle 23 ... air swivel 24a, 24b ... upper support member 25a, 25b ... guide roller 26a, 26b ... lower support member 27a, 27b ... guide roller 28a, 28b ... air cylinder 29 ... mounting member 30 ... pedestal for cleaning device in flue 31 ... Opening 32: Filler injection means 33: Filling pump 34: Filling plant 35: Blowing agent mixing plant 36: Light foam mortar filling portion 37a, 37b: Working scaffold 38 ... Temporary enclosure 39 ... Guide pulley 40 ... Wire saw 41 ... Driving means 42 ... Moving means 43 ... Cutting part 44 ... Small work room 45 ... Operation room 46 ... Dust collector GL: Ground level

Claims (11)

[Claims] 1. An outer cylinder extending vertically from a foundation to a top, and is spaced radially inward along the outer cylinder to extend circumferentially to form a space between the outer cylinder and an inner surface. In a method of dismantling a chimney having a refractory brick wall defining a flue, a filler is injected into the space and then a filler is filled into the space, and the refractory brick and the outer cylinder are mutually separated. A fixed and remotely operable cleaning means in the flue is inserted into the flue, the inside of the flue is cut off from the surrounding environment, combustion ash is removed from the inside of the flue, and the chimney is cut by the cutting means and moved. Forming a possible cut part, moving the cut part to a sealed work space, dividing it into small pieces by remote control to obtain chimney demolition waste, and discarding the chimney demolition waste according to the degree of contamination. Includes chimney dismantling method. 2. The flue washing means is vertically movable and includes high-pressure air jetting means, and the high-pressure air jetting means jets high-pressure air to the inner surface of the flue to rotate. The chimney dismantling method according to claim 1, wherein the combustion ash is removed from an inner surface of the flue. 3. The chimney dismantling method according to claim 1, wherein the high-pressure air jetting means is driven by an air motor disposed at the center of the high-pressure air jetting means. 4. The chimney dismantling method according to claim 1, wherein the cutting means includes a driving means movable in a horizontal direction with respect to the chimney. 5. The method according to claim 1, wherein the cutting means cuts the chimney inside a temporary enclosure provided around the chimney. 6. The combustion ash removal device includes a filter means for ejecting high pressure air from the high pressure air ejection means and capturing combustion ash connected to an opening formed below the chimney. The chimney disassembly method according to claim 2, 3, 4, or 5, wherein the method is performed while suction is performed by suction means. 7. An outer cylinder extending vertically from a foundation to a top portion, and is spaced radially inward along the outer cylinder to extend circumferentially to form a space between the outer cylinder and an inner surface. A method of cleaning a chimney with a refractory brick wall defining a chimney, comprising: inserting a remotely controllable chimney cleaning means including a rotatable high-pressure air jetting means into the chimney; The inside of the road is isolated from the surrounding environment, high-pressure air is blown to the inner surface of the flue, and the high-pressure air blowing means is rotated along the circumferential direction of the inner surface of the flue, and the flue washing means extends in the vertical direction of the chimney. And removing the combustion ash from the inner surface of the stack by suction and suctioning the air with suction means provided with a filter means for capturing the combustion ash connected to an opening formed below the chimney. Flue washing method 8. The method according to claim 7, wherein the high-pressure air jetting means is driven by an air motor disposed at the center of the high-pressure air jetting means. 9. An upper support and a lower support inserted in the flue and disposed concentrically with the center axis of the chimney, and high-pressure air concentrically mounted between the upper support and the lower support. A high-pressure air jetting member rotatable by high-pressure air supplied from a supply member; and a rotating member having one end movably attached to the upper support and the other end adjacent to the inner surface of the flue, the upper support being axially symmetric. A plurality of upper support members attached to a body; and the upper support body for attaching a moving means for suspending the upper support body, the lower support body, and the high-pressure air ejection member integrally and vertically movable. And a rotating member having one end movably attached to the lower support and the other end adjacent to the inner surface of the flue, and a plurality of lower members axially symmetrically attached to the lower support. Side support member, one end of which is the lower support A plurality of pressing members attached to the body and having the other end connected to the lower supporting member and pressing the lower supporting member against the inner surface of the flue, wherein the pressing member is moved vertically by the moving means. A cleaning device for cleaning the inside of the flue in a vertical direction and a circumferential direction by removing combustion adhered ash by discharging the high-pressure air from the high-pressure air discharging member. 10. The rotating member provided on the upper supporting member and the lower supporting member is a guide roller for guiding the cleaning device in the flue in the vertical direction of the chimney. The chimney cleaning device according to claim 9. 11. The high-pressure air ejection member includes a center air motor that is rotatably supported by the high-pressure air.
A communication member mounted axially symmetrically on the center air motor and supplying the high-pressure air to the inside surface of the flue; and an inner surface of the flue provided at an end of the communication member close to the inside surface of the flue due to the elasticity of the communication member. 11. A guide member, which is pressed against the inside of the flue, and an air nozzle provided on a side of the communicating member facing the inside surface of the flue to inject the high-pressure air to the inside surface of the flue. 2. The cleaning device in a flue according to 4.