JP3370525B2 - Ash deposition prevention device in chimney - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing ash adhesion in a chimney such as a refuse incinerator .

[0002]

2. Description of the Related Art In recent years, the chimneys of refuse incinerators and the like are often made of steel. In the refuse incinerators, since the exhaust gas in the chimney is usually after passing through the dust collector, the ash in the exhaust gas is Is a minute amount of fine particles. However, there was a problem that ash gradually adhered to the inner surface of the chimney after a long period of operation to form a layer of ash, and the ash layer separated and scattered. Further, due to the heat insulating effect of the ash layer, the temperature of the inner surface of the chimney decreases, low temperature corrosion due to dew condensation occurs on the inner surface of the chimney to form a rust layer, and the rust layer peels off and scatters. Also happened.

In order to reduce such adhesion of ash to the inner surface of the chimney and low temperature corrosion, heat resistant and acid resistant coating was applied to the inner surface of the chimney or corrosion resistant steel was used as the material of the chimney. Since ash adhesion cannot be prevented even by taking the measures, the inner surface of the chimney was regularly cleaned by sandblasting.

[0004]

However, in the conventional type as described above, regular cleaning by sandblasting or the like is required, which requires time and labor for the cleaning work.
The incinerator had to be shut down for cleaning.
Further, except immediately after cleaning, there is a possibility that ash attached to the inner surface of the chimney may be peeled off and scattered, or rust generated due to low temperature corrosion may be peeled off and scattered. Therefore, it is necessary to increase the frequency of cleaning. Further, the heat-resistant and acid-resistant coating requires repainting on a regular basis, and the repainting work is troublesome.

Therefore, the present invention is intended to automatically prevent ash from adhering to the inner surface of the chimney without labor.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention comprises, in the upper part of the chimney, a rotating body rotatable in the circumferential direction and the rotating body. A drive device for driving is provided, and a rope body for preventing ash adhesion is suspended in the chimney from the rotating body.
It is provided on the outside of the protrusion and rotates in the circumferential direction with multiple support rollers.
Rotatably supported outer ring and attached to this outer ring
And a suspension arm with the upper end of the rope connected to the tip.
The driving device rotates the outer ring in the circumferential direction.
When the swirling flow of the exhaust gas is generated in the chimney, the cord is spirally deformed and rotated in the circumferential direction along the inner surface of the chimney by the swirling flow of the exhaust gas.

According to this, the cord is spirally deformed and rotated in the circumferential direction along the inner surface of the chimney by the swirling flow of the exhaust gas, and is rotationally moved in the circumferential direction by the rotation of the outer ring. Slides evenly. This can automatically prevent ash from adhering to the inner surface of the chimney.

Further , the rotating body is composed of the outer ring and the suspension arm.
Because of the configuration, the upper part of the chimney is not blocked by the rotating body.
The exhaust gas flow is not obstructed and the chimney
The exhaust gas inside passes through the outer ring and is smoothly discharged upward.
Will be issued.

Furthermore, the invention according to claim 2 is directed to a chimney stack.
A rotating body that can rotate freely in the circumferential direction, and drives this rotating body
A drive device is installed to drive the rotating body into the chimney.
The rope for preventing ash adhesion is suspended, and the rotating body is a chimney.
It is installed inside and rotates in the circumferential direction with multiple support rollers.
A freely supported inner ring and
And the suspension arm with the upper end of the rope connected to the tip.
And the drive device rotates the inner ring in the circumferential direction.
When a swirling flow of exhaust gas occurs in the chimney,
However, due to the swirling flow of exhaust gas,
It is characterized by being deformed and rotated in a spiral shape.

According to this, the rope is swirled by the exhaust gas.
By means of spiral deformation in the circumferential direction along the inner surface of the chimney
At the same time, the inner ring rotates to move circumferentially.
Therefore, it slides evenly on the inner surface of the chimney. This
Ashes can be automatically prevented from adhering to the inner surface of the chimney.

Further , the rotating body is composed of the inner ring and the suspension arm.
Because of the configuration, the upper part of the chimney is not blocked by the rotating body.
The exhaust gas flow is not obstructed and the chimney
The exhaust gas inside passes through the inner ring and is smoothly discharged upward.
Will be issued.

Further, the invention according to claim 3 is a cord body.
It is characterized by using a chain . Further, in the invention according to claim 4 , a motor is used as the drive device.
The above-mentioned motor is mounted on the outer peripheral surface of the chimney.
It is characterized by being provided in .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. 1 is a chimney installed in a refuse incineration facility, etc., and at the lower end side of this chimney 1,
An exhaust duct 2 provided on the downstream side of the dust collector is connected. When the exhaust gas flows from the exhaust duct 2 into the chimney 1, the flow A of the exhaust gas flowing into the chimney 1 is normally asymmetrical, so that the swirling flow 3 of the exhaust gas naturally occurs inside the chimney 1.

At the upper end of the chimney 1, a rotating body 5 rotatable in the circumferential direction, and a motor 6 for driving the rotating body 5.
(An example of a driving device). The rotating body 5
Is an outer ring 8 provided outside the upper end of the chimney 1 and rotatably supported in the circumferential direction by a plurality of support rollers 7,
The suspension arm 9 is attached to the outer ring 8 and has a tip portion protruding above the chimney 1. The support rollers 7 are arranged outside the chimney 1 at a plurality of circumferential positions, and the support shafts 10 inserted into the support rollers 7 and the support shafts 1 are provided.
0 through a bearing 11 that rotatably holds the chimney 1
Are provided on the support bases 12 attached to the outer peripheral surfaces of the.

The drive pulley 14 provided on the drive shaft of the motor 6 and the driven pulley 1 provided on the support shaft 10 of one specific support roller 7 among the plurality of support rollers 7.
A driving belt 16 is wound between the pulleys 5 and 5, and the pulleys 14 and 15 are driven by driving the motor 6.
The specific support roller 7 is rotationally driven via the drive belt 16 and the support shaft 10, so that the outer ring 8 rotates in the circumferential direction. The motor 6 is mounted on a mounting base 17 mounted on the outer peripheral surface of the chimney 1.

A chain 18 (an example of a rope) for preventing ash adhesion is suspended from the tip of the suspension arm 9 inside the chimney 1. The chain 18 is spirally deformed in the circumferential direction along the inner surface of the chimney 1 by the swirling flow 3 of the exhaust gas.

The operation of the above structure will be described below.
The chain 18 is spirally deformed in the circumferential direction along the inner surface of the chimney 1 by the swirling flow 3 of the exhaust gas, and when the motor 6 is driven, one specific support roller 7 is rotationally driven to rotate the outer ring. Since 8 is supported by a plurality of support rollers 7 and rotates in the circumferential direction, the chains 18 rotate and move in the chimney 1 along the circumferential direction via the suspension arms 9. As a result, the chain 18 slides evenly in the circumferential direction with respect to the inner surface of the chimney 1 and automatically prevents ash from adhering to the inner surface of the chimney 1.

Further, since the rotating body 5 is composed of the outer ring 8 and the suspension arm 9, the upper portion of the chimney 1 is not blocked by the rotating body 5 and the flow of exhaust gas is not obstructed, and the chimney 1 The exhaust gas inside passes through the outer ring 8 and is smoothly discharged upward. Furthermore, the power required to prevent the adhesion of ash is economical because it is only the power of the motor 6 that rotationally drives the outer ring 8 at a low speed.

The second embodiment of the present invention will be described below with reference to FIG. The rotating body 25 includes an inner ring 26 provided inside the upper end of the chimney 1 and rotatably supported by a plurality of supporting rollers 7 in the circumferential direction, and a downward hanging arm 27 attached to the inner ring 26. It consists of and. Each of the support rollers 7 is arranged inside the chimney 1 and at a plurality of circumferential positions, and a support shaft 10 inserted into the support roller 7 and a bearing for rotatably holding the support shafts 10 outside the chimney 1 are provided. 11 and a support base 12 mounted on the outer peripheral surface of the chimney 1. Each bearing 11 is attached to each support 12, and the tip of each support shaft 10 penetrates the wall 28 of the chimney 1 from the outside to the inside and is inserted into each support roller 7.

By driving the motor 6 (an example of a driving device), a specific support roller 7 is rotated via the pulleys 14 and 15 and the driving belt 16 as in the first embodiment described above. When driven, the inner ring 26 rotates in the circumferential direction.

The operation of the above structure will be described below.
The chain 18 is spirally deformed in the circumferential direction along the inner surface of the chimney 1 by the swirling flow 3 of the exhaust gas, and by driving the motor 6, one specific support roller 7 is rotationally driven and the inner ring is rotated. 26 is supported by a plurality of support rollers 7 and rotates in the circumferential direction, so that the chain 1 is supported via the suspension arm 27.
8 rotates inside the chimney 1 along the circumferential direction. As a result, the chain 18 slides evenly in the circumferential direction with respect to the inner surface of the chimney 1 and automatically prevents ash from adhering to the inner surface of the chimney 1.

Since the rotating body 25 is composed of the inner ring 26 and the suspension arm 27, the upper portion of the chimney 1 is not blocked by the rotating body 25 and the flow of exhaust gas is not obstructed. The exhaust gas inside passes through the inner ring 26 and is smoothly discharged upward. Furthermore, the power required to prevent the adhesion of ash is economical because it is only the power of the motor 6 that rotationally drives the inner ring 26 at a low speed.

Further, in the first or second embodiment of the present invention, as shown in FIG. 2, since the flow A of the exhaust gas flowing from the exhaust duct 2 into the chimney 1 is asymmetrical and biased,
The swirl flow 3 of the exhaust gas naturally occurs inside the chimney 1, but the swirl flow 3 of the exhaust gas may be further generated as follows. That is, as shown in FIG. 4 as a third embodiment of the present invention, a flow A of exhaust gas flowing from the exhaust duct 2 to the chimney 1 is guided in a predetermined direction to an inflow portion from the exhaust duct 2 to the chimney 1. A guide plate 35 is provided. By guiding the exhaust gas by the guide plate 35 and flowing it in a predetermined direction, the exhaust gas becomes a non-uniform flow and flows into the stack 1, and a swirling flow 3 of the exhaust gas is generated inside the stack 1. Let

As a fourth embodiment of the present invention, as shown in FIG. 5, a hot air fan 38 for blowing hot air B tangentially from the lower side of the chimney 1 to the inside of the chimney 1 is provided. The hot air B is blown tangentially from the inside of the chimney 1 to the swirling flow 3 of the exhaust gas inside the chimney 1.
May be generated.

Further, as a fifth embodiment of the present invention, as shown in FIG. 6, there is one in which the outer ring 8 is rotated by another driving method. That is, a plurality of engagement rods 39 are radially attached to the outer peripheral surface of the outer ring 8 supported by the plurality of support rollers 7. A plurality of (four in FIG. 6) drive levers 40 that engage with the engagement rod 39 are attached to the drive shaft of the motor 6 (an example of a drive device) in a cross shape. A brim 41 is provided on each of the support rollers 7, and a guide body 42 that fits between the brims 41 is provided on the lower surface of the outer ring 8 over the entire circumference.

According to this, by driving the motor 6, the drive lever 40 is engaged with the engaging rod 39 while rotating, so that the outer ring 8 is supported by the plurality of supporting rollers 7 and rotates in the circumferential direction. The chain 18 rotates and moves in the circumferential direction inside the chimney 1 via the suspension arm 9.

In each of the above embodiments, the chain 18 is used as an example of the rope body for preventing ash adhesion, but the chain 18 is not limited to the chain 18, and a rope having heat resistance, a wire, a light-weight ceramic, or the like is used to form beads. You may use what was made into the shape.

Further, in each of the above embodiments, the chimney 1 of the refuse incineration facility is targeted, but a similar ash adhesion preventing device may be provided for the chimney 1 of a power plant, a chemical plant or the like. Further, in each of the above-described embodiments, one specific support roller 7 among the plurality of support rollers 7 is rotationally driven by the motor 6, but two or more support rollers 7 are rotationally driven by the motor 6. You may.

In each of the above embodiments, the motor 6 is used as an example of the driving device, but a cylinder or the like may be used.

[0030]

As described above, according to the invention described in claim 1 of the present invention, the rope is spirally deformed and rotated in the circumferential direction along the inner surface of the chimney by the swirling flow of the exhaust gas, and Because it moves in the circumferential direction by the rotation of the outer ring ,
It slides evenly around the inner surface of the chimney. As a result, ash can be automatically prevented from adhering to the inner surface of the chimney, so ash separation and low temperature corrosion can be prevented, periodic cleaning by sandblasting etc. is unnecessary, and the incinerator is stopped for cleaning. There is no need. Further, it is not necessary to apply heat resistant and acid resistant coating to the inner surface of the chimney. Furthermore, the power required to prevent the adhesion of ash is economical because it is only the power of the drive device that rotationally moves the outer ring at low speed.

Further , the rotating body is composed of the outer ring and the suspension arm.
Because of the configuration, the upper part of the chimney is not blocked by the rotating body.
The exhaust gas flow is not obstructed and the chimney
The exhaust gas inside passes through the outer ring and is smoothly discharged upward.
Will be issued.

According to the invention of claim 2, the rope is
Circulates along the inner surface of the chimney due to the swirling flow of exhaust gas.
It transforms into a spiral and rotates, and the inner ring rotates
Since it moves in the circumferential direction, it goes around the chimney inner surface evenly.
Slide in the direction. As a result, ash adheres to the inner surface of the chimney.
Can be prevented automatically.

Further , the rotating body is composed of the inner ring and the suspension arm.
Because of the configuration, the upper part of the chimney is not blocked by the rotating body.
The exhaust gas flow is not obstructed and the chimney
The exhaust gas inside passes through the inner ring and is smoothly discharged upward.
Will be issued.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an ash adhesion preventing device in a chimney according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a chimney for explaining that a swirl flow of exhaust gas is generated in the chimney.

FIG. 3 is a vertical sectional view of an ash adhesion preventing device in a chimney according to a second embodiment of the present invention.

FIG. 4 is a lateral cross-sectional view of the chimney for explaining another means for generating a swirling flow of exhaust gas in the chimney according to the third embodiment of the present invention.

FIG. 5 is a cross-sectional view of the chimney for explaining another means for generating the swirling flow of the exhaust gas in the chimney according to the fourth embodiment of the present invention.

FIG. 6 is a vertical sectional view of an ash adhesion preventing device in a chimney according to a fifth embodiment of the present invention.

[Explanation of symbols]

1 chimney 3 swirling flow 5 rotating body 6 Motor (drive device) 7 Support roller 8 outer ring 9 suspension arm 18 chains 26 Inner ring 27 suspension arm

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F23J 3/00 B01B 1/00

Claims (4)

(57) [Claims] 1. A rotator rotatable in a circumferential direction and a drive device for driving the rotator are provided on an upper portion of the chimney, and a rope body for preventing ash adhesion is hung from the rotator in the chimney. The rotating body is provided outside the chimney and has a plurality of supporting rollers.
Outer ring rotatably supported by a roller
It is attached to the outer ring and the top of the rope is connected to the tip.
Is composed of a hanging arms, the drive unit rotates the outer ring in the circumferential direction, when the swirling flow of the exhaust gas is generated within the chimney, the cable body is,
An ash adhesion preventing device in a chimney characterized by being spirally deformed and rotated in a circumferential direction along an inner surface of the chimney by a swirling flow of exhaust gas. 2. A rotation which is rotatable in the circumferential direction on the upper part of the chimney.
Body and a drive device for driving this rotating body are provided, and a rope body for preventing ash adhesion is suspended from the rotating body in the chimney.
Is, the rotating body is provided inside the chimney and a plurality of support B
Inner ring rotatably supported by a roller
It is attached to the inner ring and the top of the rope is connected to the tip.
Is composed of a hanging arms, the drive device rotates the said inner ring in the circumferential direction, when the swirling flow of the exhaust gas is generated within the chimney, the cable body is,
Due to the swirling flow of the exhaust gas, it is screwed in the circumferential direction along the inner surface of the chimney.
Prevention of ash adhesion in chimney characterized by rotating and rotating in a spiral shape
Stop device. 3. A chain is used as a cord.
A device for preventing ash adhesion in a chimney according to claim 1 or 2.
Place 4. A motor is used as a driving device, and the motor is mounted on a mounting base mounted on the outer peripheral surface of the chimney.
Claims 1 to 3 are characterized in that
The ash adhesion preventing device in the chimney according to any one of the above.