JP2001208332A - Adhered substance removing apparatus for melting furnace exhaust duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhered substance removing apparatus, which can uniformly cut dust adhered on the inside surface of an exhaust gas duct connected to the exhaust gas hole of a melting furnace and easily remove cutting dust. SOLUTION: An exhaust duct 23 is connected to a gas exhausting hole 22 arranged on the upper sidewall 21a of a melting furnace 21, and the edge of the exhaust duct 23 is connected to the sidewall of an exhaust gas path 26 arranged to the lower edge part of a combusting equipment 24. The adhered substance removing apparatus 25, comprising a cutting body 28, a rod 29 and a driving unit 30 driving the cutting body 28 and the rod 29, utilizes the deflection of the cutting body attached to the edge of the rod at cutting. When the cutting body is fed and rotated, the edge body touches the adhered dust on the inner surface of the exhaust duct by the deflection of the cutting body and the adhered dust is cut. The cutting dust accumulates not only on a front surface side but also on a back surface side of the cutting body. Therefore, the cutting dust can be removed while moving not only on an advancing side but also on retreating side of the cutting body 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting and removing dust adhering to an inner surface of an exhaust gas duct connected to a gas outlet of a melting furnace for melting ash such as incinerated ash and fly ash.

[0002]

2. Description of the Related Art In the above-mentioned melting furnace, ash such as incinerated ash and fly ash generated in the incineration melting furnace (hereinafter simply referred to as "ash") is melted. In the ash melting process, a gas outlet is provided on the ceiling or upper part of the melting furnace to discharge the exhaust gas generated in the furnace, an exhaust gas duct is connected to the gas outlet, and the exhaust gas duct guides the exhaust gas to a combustion device etc. ing.

[0003] In a reducing atmosphere in which the main component of the exhaust gas is carbon monoxide, heavy metals such as lead and zinc are volatilized and contained in the exhaust gas, sent to the exhaust gas duct, and adhere to the inner surface of the exhaust gas duct. Since the melting point is low, it is re-melted by radiant heat from the furnace and from the combustion device and adheres to the inner surface of the exhaust gas duct and solidifies. This may cause clogging or the like in the exhaust gas duct as attached dust. Therefore, the attached dust removal device is used to periodically or irregularly cut and remove the attached dust.

Japanese Patent Application Laid-Open No. Hei 10-238745 discloses an apparatus for removing deposits from an exhaust gas duct of a melting furnace as shown in FIG.

FIG. 8 shows a melting furnace 1, an exhaust gas duct 2 disposed on the melting furnace 1, and adhering matter removing devices 3 and 4 provided in the exhaust gas duct 2. The melting furnace 1 melts "ash" generated in the incineration melting furnace. The melting furnace 1 is of an electric resistance type, and an electrode (not shown) to which electric power is supplied outside the furnace is moved up and down in the furnace to bring the lowered electrode into contact with the melt and to supply electricity to the melt to produce Joule heat. Is generated and the ash is heated and melted. The components of the gas discharged out of the furnace are mainly composed of carbon monoxide, which is a reducing atmosphere.

[0006] NO _X in the reduced atmosphere, HCl, is effective of reducing the toxic gas components such as dioxin, on the other hand, lead, heavy metals such as zinc is sent to the exhaust gas duct 2 volatilization, attached to an exhaust gas duct inner surface Alternatively, since the melting point is low, it is re-melted by the radiant heat from the melting furnace 1 and the combustion device 12, adheres to the inner surface of the exhaust gas duct, releases heat, and solidifies. Deposits due to heavy metals such as lead and zinc are treated as adhered dust.

The first adhering matter removing device 3 removes adhering dust on the horizontal duct portion 5, and the second adhering matter removing device 4 removes adhering dust on the inclined duct portion 6.

The first adhering substance removing device 3 includes a horizontal duct 5
And a support member 8 for supporting the blade body 7 (these are integrally treated and referred to as a cutting body) and a rod 9. A cylinder 10 is provided outside the exhaust gas duct 2. I have. The rod 9 protrudes into the horizontal duct portion 5 and is connected to the support member 8. Then, the rod 9 is reciprocated by the cylinder 10, and the cutting body connected to the distal end of the rod 9 slides and reciprocates in the axial direction in the horizontal duct unit 5 integrally with the rod 9.

The blade body 7 has a cutting portion 7a formed in a disk shape.
And a guide portion 7b extending rearward from the lower half of the cutting portion 7a in a semi-cylindrical shape.

Since the cutting portion 7a is formed in a disk shape, dust adhering to the entire peripheral surface inside the horizontal duct portion 5 can be cut only by the blade body 7 sliding in the horizontal direction.

The cutting section 7a moves the dust cut from the horizontal duct section 5 leftward on the front surface of the cutting section 7a, drops the dust into the dust discharge path 11, and
And collected and removed by a dust collection container (not shown) provided at the lower end side. On the other hand, the exhaust gas is guided to the combustion device 12 and burned.

The guide portion 7b has a function of stably and smoothly sliding the blade body 7 in the horizontal duct portion 5.

The second attached matter removing device 4 is basically the same as the first attached matter removing device 3, and includes a cutting body and a rod 9.
And a cylinder 10 (omitted) outside the exhaust gas duct 2
It has. However, the blade body 7 has only the cutting portion 7a and does not have the guide portion 7b. The inclined duct 6 can be cut by the cutting portion 7a sliding smoothly in the inclined duct 6 without the guide 7b.

The adhering matter removing devices 3 and 4 can rotate the rod and the cutting body around the axis by an air motor or the like. In this case, a guide disc is fixed to the rod behind the blade body instead of the guide portion 7b, so that the slide can stably slide in the exhaust gas duct.

[0015]

When cutting off the dust adhering to the inner surface of the exhaust gas duct with the adhering matter removing device, generally, a clearance of about 4 mm is provided between the blade and the inner surface of the exhaust gas duct, and the inner surface of the exhaust gas duct is generally cut off. To prevent damage.

However, when the exhaust gas duct has a horizontal duct portion or an inclined duct portion, dust adheres thicker on the lower side of the inner surface than on the upper side of the inner surface. Moreover, the attached dust is very hard.

[0017] Therefore, the following problem arises when the conventional attached matter removing device is directly used for cutting the attached dust in the horizontal duct portion or the inclined duct portion.

In the above-described attached matter removing apparatus, when cutting the attached dust, the thickness of the attached dust on the inner surface upper side and the inner surface lower side is different. Alternatively, it is difficult to uniformly cut the entire peripheral surface in the inclined duct portion.

In addition, a large driving force is required to move and remove the cutting dust on the front surface of the cutting portion 7a of the cutting body at a time, and it is necessary to frequently drive the cutting dust, which is complicated.

In addition, when the attached dust on the lower side of the exhaust gas dust is not uniformly cut, the guide portion 7b rides on the remaining attached dust, and the upper side of the inner surface is cut and damaged together with the attached dust.

Further, even if the adhering substance removing device slides and advances the cutting body in the axial direction and rotates it around the axis, the cutting body 7a of the cutting body or the guide disk fixed to the rod may be used. In addition, a large driving force is required to move and remove the cutting dust at a time, and it is necessary to drive the cutting dust frequently, which is complicated.

The present inventors have studied the case where the exhaust gas duct has a horizontal duct portion and an inclined duct portion in view of the above circumstances, and have reached the present invention.

The present invention provides an apparatus for removing adhering matter which can uniformly remove dust adhering to the inner surface of an exhaust gas duct having a horizontal duct portion or an inclined duct portion, which is connected to an exhaust gas port of a melting furnace, and can easily remove the cut dust. The purpose is to provide.

[0024]

According to the first aspect of the present invention,
Eliminating deposits on the exhaust gas duct connected to the gas outlet of the melting furnace, comprising a cutting body consisting of a blade body and a support member,
What is claimed is: 1. An attachment removing apparatus having a function of rotating a cutting body around an axis, wherein the cutting body is configured such that a blade body is composed of a rear-side outer peripheral blade and a forward-side blade. This is a device for removing deposits from the exhaust gas duct.

The forward side blade is a general term for a blade capable of cutting off attached dust when the cutting body rotates forward in the exhaust gas duct.
Specifically, the tip blade and the forward-side outer peripheral blade are individually attached to the support member, or a combination of the leading-edge blade and the forward-side outer peripheral blade.

The retreating outer peripheral blade is a blade that plays a role of uniformly cutting the residual dust on the inner surface of the exhaust gas duct. Since the cutting body has a rod attached to the center of the rear end, the reciprocating side excluding that portion is mounted on the retreating side. Because it is attached, it was limited to the outer peripheral blade.

According to the present invention, by utilizing the fact that the cutting body is rotated around the axis with the forward movement of the cutting body, the cutting body is bent to the inner surface of the exhaust gas duct by attaching the reverse outer peripheral blade to the cutting body. Then, the adhering dust is cut by the advancing-side blade, and thereafter, the cutting body is rotated around the axis as the cutting body moves backward, so that the remaining adhering dust can be uniformly cut.

Therefore, the dust adhered can be uniformly cut by repeating the forward and backward rotation of the cutting body. Therefore, unlike the case where the dust adhering to the inner surface of the exhaust gas duct is uniformly cut only by the forward blade, the driving force is increased. No burden.

Further, the cutting body is bent to the exhaust gas duct, and the blade body comes into contact with the attached dust to cut the attached dust.
The cutting dust accumulates on the front side and the rear side of the cutting body.

Therefore, the cutting dust generated by the forward rotation does not move all at once on the front surface of the cutting body, but also in the backward rotation of the cutting body together with the cutting dust generated by the cutting of the remaining dust. At the rear surface of the cutting body, for example, it moves to the exhaust gas passage side and is collected.

As described above, the dust on the inner surface of the exhaust gas duct is cut and removed by the repetition of the cutting and removing operation by providing the outer peripheral blade on the reverse side and effectively utilizing the time of reverse driving. Since the attached dust can be uniformly cut and the cut dust can be easily removed, the driving force can be reduced and the frequency can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, a deposit discharging mechanism is provided at a rear end side of the cutting body.

According to the present invention, since the adhering matter discharge mechanism is provided at the rear end of the cutting body, the cutting dust generated by the forward and backward rotation of the cutting body can be removed from the rear side of the cutting body during the forward and backward rotation, for example, the exhaust gas passage. It can be forcibly moved to the side and collected at the same time.

According to a third aspect of the present invention, in the invention according to the first aspect, the support member for the cutting body is composed of a rear split support member for supporting the rear peripheral blade and a front split support member for supporting the forward blade. An attachment discharge mechanism is provided between the divided support members.

According to this invention, since the support member of the cutting body is composed of the front divided support member and the rear divided support member, and the attached matter discharge mechanism is provided between the front and rear divided support members, the cut body is rotated forward. A large amount of the dust thus cut is deposited between the front split support member and the rear split support member, and is forcibly moved simultaneously to the rear side of the cut body, for example, to the exhaust gas passage side, and can be collected.

According to a fourth or fifth aspect of the present invention, in the second or third aspect of the invention, the attached matter discharging mechanism is a single or multiple screw type discharging mechanism.

According to the present invention, since the adhering matter discharging mechanism is a single or multi-screw discharging mechanism, the cutting dust can be efficiently moved and removed by utilizing the forward and backward rotational force of the cutting body. . Practically, one to three screw-type discharge mechanisms are employed.

[0038]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a side view showing an example of a cutting body which is a main part of the present invention, and FIG.
It is a front view by the A line arrow.

FIG. 1 shows a melting furnace 21 for melting ash, and an exhaust gas duct 23 connected to a gas outlet 22 provided on an upper side wall 21a for guiding exhaust gas to a combustion device 24. Adhered matter removal device 25 in duct 23
Is installed.

Here, the melting furnace 21 is an incinerator (not shown).
The ash generated in the above is melted.

The melting furnace 21 is of an electric resistance type, and an electrode (not shown) supplied with electric power outside the furnace moves up and down in the furnace to bring the lowered electrode into contact with the molten material and to supply electricity to the molten material. It generates Joule heat and heats and melts the ash.

Since electrodes (not shown) and the like are arranged on the furnace lid 21b of the melting furnace 21, the gas discharge ports 2 are formed on the upper side wall 21a.
2, the exhaust gas duct 23 is connected. A space is formed inside the upper side wall provided with the gas outlet 22.

The exhaust gas duct 23 has a distal end connected to a side wall of an exhaust gas passage 26 provided at a lower end of the combustion device 24. The exhaust gas duct 23 has its tip end inclined downward so that the dust contained in the exhaust gas can easily fall into the dust collection container 27 connected to the lower end of the exhaust gas passage 26.
Reference numeral 23a indicates an inclined duct portion.

Exhaust gas discharged outside the furnace is mainly composed of carbon monoxide in a reducing atmosphere, and heavy metals such as lead and zinc are volatilized and mixed in the exhaust gas. Since these have a low melting point, they adhere to the inner surface of the inclined duct portion 23a, or
1 and re-melt by the radiant heat from the combustion device 24, adhere to the inner surface of the inclined duct portion 23a, and solidify. These deposits are treated as deposit dust.

The adhering matter removing device 25 includes an inclined duct 23a.
It is for removing dust adhering inside.

The adhering matter removing device 25 comprises a cutting body 28, a rod 29, and a driving device 30 for driving them.

In the present invention, the cutting utilizes the bending of the cutting body attached to the distal end of the rod, and does not use a member which generates a resistance like the guide disk of the prior art. If the cutting body is rotated forward, the blade will contact and adhere to the dust attached to the inner surface of the exhaust gas duct due to the bending of the cutting body.
The cutting dust does not accumulate only on the front side of the cutting body,
It is also deposited on the rear side. Therefore, the cutting dust is generated by the cutting body 28.
Can be removed not only on the forward side but also on the reverse side.

The magnitude of the above-mentioned bending of the cutting body varies depending on the length from the base end of the rod to the cutting body, the material and the shape of the cutting body, etc., but can be empirically obtained based on experiments and the like. Therefore, a clearance is set between the cutting body and the inner surface of the exhaust gas duct in consideration of the bending so as not to cut the inner surface (according to the present inventors, it is empirically 5 to 50 mm).
Is appropriate).

The cutting body 28 is composed of a blade body and a support member 32. The blade body includes a backward outer peripheral blade 31c and a forward blade 31. The forward blade 31 has a tip blade 31a and a forward outer blade 31b. Are combined.

The forward blade 31 is a general term for blades capable of cutting off adhering dust when the cutting body 28 rotates forward in the exhaust gas duct 23. Specifically, the forward blade 31a and the forward outer blade 31b are individually used. Attached to the support member 32 with
Alternatively, the tip blade 31a and the forward outer peripheral blade 31b are combined and attached to the support member 32.

In the embodiment shown in FIGS. 1 to 3, the tip blade 3
Although the combination of 1a and the outer peripheral blade 31b is used, the present invention is not limited to this, and the distal blade 31a and the outer peripheral blade 31b can be used independently.
These can be appropriately selected depending on the state of dust attached to the exhaust gas duct.

As shown in FIG. 4, the inclination angle of the outer peripheral blade 31b is preferably from 0 to 60 degrees. If it exceeds 60 °, it will be too inclined when it comes into contact with the attached dust, and cutting will not be sufficient. If it is less than 0 °, cutting cannot be performed by forward rotation.

The retreating outer peripheral blade 31c is a blade that plays a role of uniformly cutting residual dust on the inner surface of the exhaust gas duct. Since the cutting body has a rod attached to the center of the rear end, the reciprocating side outer blade 31c is removed. , So it was limited to the outer blade.

As shown in FIG. 4, the angle of inclination of the outer peripheral blade 31c is preferably 0 to 60 °. If it exceeds 60 °, it will be too inclined when it comes into contact with the attached dust, and cutting will not be sufficient. If it is less than 0 °, it cannot be cut by reverse rotation.

Next, the reason why the blade body is constituted by the rear side outer peripheral blade 31c and the forward side blade 31 will be described.

As described above, NO _x ,
It has the effect of reducing harmful gas components such as HCl and dioxin, but on the other hand, heavy metals such as lead and zinc are volatilized and sent to the exhaust gas duct 23 and adhere to the inner surface of the exhaust gas duct 23, or melt because of a low melting point. Furnace 21 and combustion device 2
4 and re-melt by the radiant heat, adhere to the inner surface of the exhaust gas duct 23, radiate heat and solidify.

However, since the exhaust gas duct 23 using the adhering matter removing device 25 has a horizontal duct portion or an inclined duct portion, the dust adhering to the inner surface thereof has a different thickness at the upper and lower inner surfaces.

Further, the cut dust must be removed to the melting furnace 21 or to the exhaust gas passage 26.

In the present invention, the cutting body 28 is provided with the reverse side outer peripheral edge 31.
Since c is attached, it is not necessary to forcibly cut the attached dust having different thicknesses on the inner surface of the exhaust gas duct by the forward side blade 31 by using only the forward side blade 31. That is, after the cutting body is rotated forward to cut the attached dust on the inner surface, the cutting body is rotated backward to uniformly cut the remaining attached dust.

As described above, the backward outer peripheral blade 31c and the forward blade 31 are effectively used, and the dust attached to the inner surface of the exhaust gas duct is cut and removed by repeating the cutting and removing operation. The dust adhering to the inner surface can be uniformly cut, and the cut dust can be moved to both ends of the exhaust gas duct, so that the burden can be reduced and the dust can be easily removed.

The reverse side outer peripheral edge 31c of the cutting body 28
The support blade 32 is fixed to the front and rear portions of the support member 32 by screws, brazing, or the like. Further, a rod 29 is attached to a rear portion of the support member 32 and is fixed with screws or the like.

Next, the driving device 30 will be described in detail.
The driving device 30 includes an air motor 33 that rotates the cutting body 25 around the axis through the rod 29, and an air motor 33.
And a cylinder 35 for causing the carriage 34 to reciprocate linearly.

In the embodiment of FIG. 1, the carriage 34 and the air motor 33 mounted on the carriage 34 are used as the driving device 30. However, the present invention is not limited to this, and the rod 29 and the cutting body attached to the tip thereof are used. What is necessary is just to be able to reciprocate and rotate 28.

Next, the case where the attached dust in the exhaust gas duct is cut and removed by the attached matter removing apparatus according to the above-described embodiment will be described in detail.

The adhering matter removing device 25 drives the cylinder 35 to move the carriage 34 to the left side (toward the exhaust gas duct), and the air motor 33 fixed to the carriage 34 and the rod 29 connected to the air motor 33 and the rod 29 The cutting body 28 attached to the distal end is moved, and the cutting body 28 protrudes into the exhaust gas duct 23, that is, the inclined duct section 23a.

The cutting body 28 advances in the inclined duct portion 23a, and rotates around the axis by the driving of the air motor 33, so that the dust adhering to the inner surface of the inclined duct portion 23a has a tip blade 31a and a forward outer peripheral blade. 31b is contacted and cut.

Although a part of the cutting dust is deposited on the front side of the cutting body 28, the cutting body 2 is immediately rotated by the forward rotation of the cutting body 28.
8 is moved to the gas outlet 22 side in front of the gas outlet 22.
From the melting furnace 21 to be re-melted and removed.

Since the base end of the exhaust gas duct 23 projects into the space inside the upper side wall 21a, the cutting dust dropped into the furnace is easily re-melted without returning to the inside of the exhaust gas duct 23.

Next, by performing the reverse operation, the cutting body 28 is moved backward in the inclined duct portion 23a, and is rotated around the axis by the driving of the air motor 33 to remove the remaining adhering dust on the inner surface of the inclined duct portion 23a. Cutting is performed by bringing the outer peripheral blade 31c into contact with the reverse side. At this time, the tip blade 31a and the forward-side outer peripheral blade 3
1b, the cutting dust accumulated on the rear side of the cutting body 28 at the rear side of the cutting body 28 is also moved on the rear surface of the cutting body 28, falls into the exhaust gas passage 26, and is collected by the dust collecting container 27. You.

According to the embodiment shown in FIGS. 1 to 4, the blade body composed of the outer peripheral blade 31c, the tip blade 31a, and the outer peripheral blade 31b is moved around the axis together with the forward and backward movement of the cutting body 28. Rotate, making use of the bending of the cutting body to the inner surface side that occurs at that time, making the blade body contact with the attached dust and cutting, depositing cutting dust on the front and back sides of the cutting body, by the front and rear faces of the cutting body, It is moved to the inside of the furnace and dropped into the furnace to be removed, or moved to the exhaust gas passage 26 side to be dropped and collected by the dust collection container 27.

As described above, the cutting and removal of the adhering dust is performed by the repetitive operation by the forward and backward rotation of the cutting body, so that the adhering dust on the inner surface of the exhaust gas duct can be uniformly cut. Since it accumulates on the front and rear sides of the body, it can be easily moved to and removed from both ends of the exhaust gas duct by the repeated operation by the front and rear faces of the cutting body.

FIG. 5 is a side view showing another example of the cutting body used in the present invention. 2 are denoted by the same reference numerals, and a part of the description is omitted.

The cutting body 33 includes a blade body, a support member 32, and an attached matter discharging mechanism 34a attached to the rear end side. The blade body includes a tip blade 31a, a forward outer peripheral blade 31b, and a backward outer peripheral blade 31c.

According to the attached matter discharging mechanism 34a, the cutting body 3
The dust 3 rotates around the axis as it moves forward and backward, and the cut dust can be simultaneously moved to the exhaust gas passage side (or the melting furnace side) and collected. Reference numeral 40 denotes a screw blade.

In the embodiment shown in FIG.
Although a screw discharge device was used for a, the present invention is not limited to this. For example, a rod (including an extension of the rod tip) is provided on the rear end side of the cutting body 33, and a predetermined angle is provided around the rod radially. The cutting blade can be rotated by utilizing the forward rotational force of the cutting body, and the cutting dust can be moved backward and removed.

FIG. 6 is a side view showing another example of the cutting body used in the present invention. 2 and 5 are denoted by the same reference numerals, and a part of the description is omitted. The support member of the cutting body 36 includes a rear split support member 37b that supports the reverse outer peripheral blade portion 31c, and a front split support member 37a that supports the distal end blade 31a and the forward outer peripheral blade 31b. An attached matter discharging mechanism 34b is provided between 37a and 37b. Reference numeral 40 denotes a screw blade.

In the embodiment shown in FIG.
Although a screw type discharging device is used for b, the present invention is not limited to this. For example, the front and rear divided support members 37a and 37b
A rod (including the extension of the tip of the rod) is provided between the rods, blades are provided radially around the rod at a predetermined angle, and the cutting body is rotated by using the forward rotational force of the cutting body. To remove it.

According to the attached matter discharging mechanism 34b, the cutting body 3
Since the support member 6 is composed of the front divided support member 37a and the rear divided support member 37b, the cutting body 36 can be rotated forward to deposit a large amount of cut dust on the rear surface side. For example, it can be simultaneously moved to the exhaust gas passage side and collected.

FIG. 7 is a side view showing another example of the cutting body used in the present invention. 5 are denoted by the same reference numerals, and a part of the description is omitted.

The cutting body 38 is composed of a front divided support member 37a for supporting the front edge blade 31a and the forward outer peripheral blade 31b, and a rear divided support member 37b for supporting the reverse outer peripheral blade 31c.
Screw type discharge mechanism 3 having two screw blades 40a, 40b between front and rear divided support members 37a, 37b
9 are provided.

First, since the supporting member of the cutting body 38 is composed of the front divided supporting member 37a and the rear divided supporting member 37b, the dust cut by rotating the cutting body 38 forward is divided into the front divided supporting member 37a and the rear divided supporting member 37a. Since a large amount can be deposited between the support members 37b, using the forward rotational force,
The cutting dust can be simultaneously moved and collected by, for example, the exhaust gas passage side by the screw discharge mechanism 39.

In the embodiment shown in FIG. 7, the screw type discharge mechanism 39 has two screw blades 40a, 40b.
However, the present invention is not limited thereto, and three or more screw blades can be used as necessary.
These screw discharge mechanisms are suitable for processing a large amount of cutting dust.

[0083]

According to the present invention, the dust adhering to the inner surface of the exhaust gas duct having the horizontal duct portion or the inclined duct portion can be reduced by a simple structure in which the blade body of the cutting body is constituted by the outer peripheral blade and the forward blade. It cuts uniformly and can easily move and remove cutting dust.

Further, by providing a discharge mechanism to the cutting body, the cutting dust can be more easily moved and removed.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment according to the present invention.

FIG. 2 is a side view showing an example of a cutting body used in the present invention.

FIG. 3 is a front view taken along line AA of FIG. 2;

FIG. 4 is an explanatory diagram of a blade body inclination angle used in the present invention.

FIG. 5 is a side view of another example of the cutting body used in the present invention.

FIG. 6 is a side view of another example of the cutting body used in the present invention.

FIG. 7 is a side view of another example of the cutting body used in the present invention.

FIG. 8 is a diagram showing an example of a conventional apparatus for removing deposits from an exhaust gas duct of a melting furnace.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Melting furnace 21a Furnace lid 22 Gas exhaust port 23 Exhaust gas duct 23a Inclined duct part 24 Combustion device 25 Debris removal device 26 Exhaust gas passage 27 Dust collection container 28, 33, 36, 38 Cutting body 29 Rod 30 Drive device 31 Advance side blade 31a Tip blade 31b Forward-side outer blade 31c Reverse-side outer blade 32 Support member 34a, 34b Debris discharge mechanism 35 Cylinder 37a Front split support member 37b Rear split support member 39 Double screw discharge mechanism 40, 40a, 40b Screw blade

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hidenobu Hiraoka 1-2-2 Marunouchi, Chiyoda-ku, Tokyo F-term in Nihon Kokan Co., Ltd. 3K061 QA11 QA16 4K056 AA05 CA20 DB23

Claims (5)

[Claims] 1. A cutting body comprising a blade body and a support member for removing deposits on an exhaust gas duct connected to a gas outlet of a melting furnace, and having a function of rotating the cutting body around an axis. An attached matter removing device, wherein the cutting body has a blade body,
An apparatus for removing deposits from a flue gas duct of a melting furnace, comprising an outer peripheral blade on a reverse side and a forward side blade. 2. An apparatus for removing deposits from a flue gas duct of a melting furnace according to claim 1, further comprising a deposit discharging mechanism provided on a rear end side of the cutting body. 3. A support member for a cutting body includes a rear split support member for supporting a reverse outer peripheral blade and a front split support member for supporting a forward blade, and an adhering matter discharging mechanism is provided between the front and rear split support members. The apparatus for removing deposits from an exhaust gas duct of a melting furnace according to claim 1, wherein the apparatus is provided. 4. The apparatus for removing deposits from an exhaust gas duct of a melting furnace according to claim 2, wherein the deposit discharge mechanism is a screw-type discharge mechanism. 5. An apparatus for removing deposits from a flue gas duct of a melting furnace according to claim 2, wherein the deposit discharge mechanism is a multi-screw discharge mechanism.