JP3035281B1 - Waste incinerator - Google Patents

Abstract

The present invention relates to an incinerator capable of removing deposits formed in a hot gas passage portion on a grate by burning a disposable diaper or the like even when the deposits are formed in the passage portion. The purpose is to provide. SOLUTION: A primary combustion chamber is arranged above a grate and a secondary combustion chamber is arranged below the grate, and hot gas in the secondary combustion chamber is supplied to the primary combustion chamber via the grate. In the incinerator configured as described above, in the primary combustion chamber, a stirring blade that faces the grate and moves in a plane parallel to the grate has a multi-blade structure extending radially on both sides from the center of the grate, The engagement portions of the hot gas passage portions projecting from the lower surfaces of the respective stirring blades are located at pitch circles having different radii.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to household garbage and garbage, kitchen waste, medical waste, industrial wood,
The present invention relates to a waste incinerator applied to the incineration of waste plastics and the like, and particularly to small-sized incinerators used for burning waste containing urinary hydrates such as disposable diapers in the burnable materials, such as hospital and nursing home waste. Waste incinerator.

[0002]

2. Description of the Related Art Conventionally, in a smaller incinerator, a primary combustion chamber is arranged above a grate and a secondary combustion chamber is arranged below a grate in order to reduce equipment costs and reduce size. An ejector burner is provided on the inlet side of the secondary combustion chamber,
An incinerator in which the pyrolysis gas obtained in the primary combustion chamber into which waste is introduced is led to the secondary combustion chamber through a circulation duct, and the main combustion is performed using the fuel of the ejector burner and the pyrolysis gas. Proposed. (Japanese Patent Application No. 9-4797
No. 9, etc.)

FIG. 7 is a sectional view showing the structure of such a conventional waste incinerator. In the figure, the interior of the furnace is divided into a primary combustion chamber (gasification combustion chamber) 2 above it through a grate 1, a secondary combustion chamber 3 below it, and two upper and lower chambers. An ejector burner 4 is installed at the inlet side in a horizontal direction, and is arranged so that a fuel gas flow C can be jetted into the secondary combustion chamber 3 below the grate 1. The outlet side of the secondary combustion chamber 3 communicates with the chimney 10 via the soaking chamber 6. On the other hand, a refuse inlet 05 is provided above the primary combustion chamber 2, and refuse A introduced from the refuse input port 05 is stored in the primary combustion chamber 2 by the grate 1.

A gas circulation passage 8 is provided between the upper part of the primary combustion chamber 2 and the ejector burner mounting part (suction chamber 23) on the inlet side of the secondary combustion chamber 3 so that the injection gas flow of the ejector burner 4 (fuel Gas flow) by the suction force of C, the primary combustion chamber 2
The pyrolysis gas B of the waste (garbage) A gasified in the above is guided to the inlet side of the secondary combustion chamber 3.

The ejector burner 4 is constituted by a supply pipe for a fuel 11 (not shown), a supply pipe for a primary air 17 and a supply pipe for a secondary air 21 which are concentrically surrounded by a blower 16. The generated primary air and secondary air are supplied. Incidentally, 22 is a diffuser, and 23 is a suction chamber.

In this configuration, the waste A stored in the primary combustion chamber 2 on the grate 1 from the refuse inlet 05 transfers a part (about 30%) of the fuel gas C ′ of the burner 4 under the grate 1. To the primary combustion chamber 2 to partially burn,
It is gasified (pyrolysis gas B). The pyrolysis gas B generated by the partial combustion rises in the primary combustion chamber 2, is sucked and mixed by the fuel gas C from the burner 4 through the circulation passage 8, and is introduced into the secondary combustion chamber 3. Complete combustion of the pyrolysis gas B and fuel gas C is performed in the secondary combustion chamber 3,
The air is released from the chimney 10 to the atmosphere via the soaking chamber 6.

[0007]

In the waste incinerator having such a structure, the waste A charged into the primary combustion chamber 2 on the grate 1 is various and various, and some of the wastes are contained in the waste A. It also contains many low-melting substances that solidify when heated,
Particularly in hospitals and nursing homes, a large amount of disposable diapers are discarded in addition to food leftovers and medical waste in the cafeteria. Such disposable diapers contain a large amount of salts such as NaCl and KCl in the water of urination and the like. Is deposited on the grate as ash (including NaCl) in the diaper by burning in the primary combustion chamber of the disposable diaper, and as time passes, the concentration of salts such as Na and Cl in the ash increases, and A deposit is formed (ash melt-solidified sintered body) using Cl, K (melting point 650 to 800 ° C.) as nuclei, and the gas vents of the grate are closed.

When the gas vent is closed, the amount of circulating gas from the ejector burner, more specifically, the amount of hot gas supplied from the secondary combustion chamber is reduced, and the amount of waste incineration is reduced accordingly. It has the disadvantage of lowering.

In order to solve the above-mentioned problems, the present invention prevents the gas vents of the grate from being blocked, or minimizes the decrease in the amount of hot gas supplied from the secondary combustion chamber even if the holes are blocked. Accordingly, it is an object of the present invention to provide a small incinerator capable of performing a smooth waste incineration process.

[0010]

According to the first aspect of the present invention,
A primary combustion chamber is arranged on the upper side of the grate and a secondary combustion chamber is arranged on the lower side, and a part of the hot gas in the secondary combustion chamber is supplied to the primary combustion chamber via the grate. In the incinerator configured in the above, while providing a bucket for storing waste through a combustion gas blocking inner lid outside the primary combustion chamber and a garbage input unit provided with an outer lid for charging waste into the bucket, After the inner lid is opened, waste can be put into the primary combustion chamber via the bucket. In this invention, after the outer lid is opened, the bucket is rotated at the time when the inner lid is opened, the refuse is dropped into the primary combustion chamber by the free gravity of the refuse, and the blocking lid and the bucket are returned to the original position. return. Further, in order to move the refuse falling from the inner lid of the refuse input port to the interior of the primary combustion chamber by the stirring blade, a mechanism in which the rotation of the blocking cover and the bucket is linked to the relative position of the stirring blade is preferable. Therefore, according to the present invention, it is possible to lower the position of the refuse storage bucket as compared with charging refuse from the upper part of the primary combustion chamber, the space volume is closed, the outer lid is opened,
Garbage is thrown into the bucket when the shut-off lid is closed, the outer lid is closed, and the shut-off lid is opened to completely shut off discharge of fuel gas to the outside. Further, the position of the stirring blade is linked to the movement of the shutoff lid and the bucket, so that the dust can be easily thrown into the interior of the primary combustion chamber by the rotating force of the stirring blade in addition to the falling of the waste by its own weight.

According to a second aspect of the present invention, in addition to the above invention, a stirring blade which faces the grate and moves in a plane parallel to the grate is provided in the primary combustion chamber. A hot gas passage portion extending along the moving direction is provided, and an engaging portion that penetrates into the hot gas passage portion is provided on a lower surface side of the stirring blade, and the engagement follows the movement of the stirring blade. The portion is configured to move in the hot gas passage portion so as to remove deposits on the passage portion. Note that the movement includes reciprocating movement in addition to rotational movement. Therefore, the gas passage portion also includes a parallel slit along the reciprocating direction in addition to the arc and the ring circle, and further includes a case where the parallel slits are opened such that the extending directions of the parallel slits intersect in a parallel plane. According to this invention, NaCl or KC is formed on a grate by burning paper diapers or the like.
1 and the like (melting point of 650 to 800 ° C.) as cores, even when deposits are formed in the hot gas passage portion of the grate,
Following the movement of the agitating blade, the engaging portion moves along the hot gas passage portion, and it is possible to remove the deposits formed in the passage portion, thereby closing the gas vent of the grate. Absent.

[0012] According to a third aspect, the moving direction of the rotor blade facing the said grate is the rotational direction, according to claim 2, wherein the hot gas passage formed in the grate is an arc or ring yen In the waste incinerator, the rotating blades have a plurality of blade structures extending in the radial direction from the center of the grate, and a plurality of protrusions projecting toward the grate are provided on the lower surface side of each of the stirring blades. It is characterized by having.

According to the present invention, since the rotor has a multi-blade structure extending radially on both sides from the center of the grate,
When the rotary blade is rotated, it becomes symmetrical left and right, and there is no uneven load on the stirring shaft. Further, the waste stored in the primary combustion chamber is partially burned and gasified by the hot gas from the secondary combustion chamber, but when the waste is a large water-containing waste such as a disposable diaper, for example, More successive drying → carbonization →
Ashing proceeds, but in this case, if the waste is placed without agitation and placed in a fire state, the outer ashed portion becomes a heat insulating layer and the central portion is not burned and remains unburned (insufficient combustion).
There are cases.

In such a case, the agitating blades of the two-blade structure are agitated at a position facing the grate, and a plurality of projecting portions projecting toward the grate on the lower surface side of the agitating blades.
The grate upper surface is forcibly stirred to forcibly remove the incinerated portion outside the disposable diaper, and the carbonized portion to be burned is always exposed and stirred, thereby enabling effective combustion.

According to a fourth aspect of the present invention, when the moving direction of the rotor blade facing the grate is the rotation direction, and the hot gas passage portion formed in the grate is an arc or a ring circle, the rotating blade may be rotated. The blades have a multi-blade structure extending radially on both sides from the center of the grate, and the engagement portions of the hot gas passage portions projecting from the lower surface side of the respective stirring blades have pitch circular shapes having different radii. Is characterized by being located at

According to the present invention, in order to engagement portion of the heat gas passage portion is obtain a structure similar to that of the plurality of projecting portions of the third aspect, together with the effect of the invention of claim 3, wherein Even when a large number of hot gas passages are formed on the grate, the engagement portions of the stirring blades are arranged by forming the engagement portions of the hot gas passages in a pitch circle shape having different radii. By alternately forming the pitch circles, all the hot gas passages can be scraped.

According to a fifth aspect of the present invention, the primary combustion chamber is disposed above the grate and the secondary combustion chamber is disposed below the grate, and the hot gas in the secondary combustion chamber is passed through the grate. In the incinerator configured to be fed to the primary combustion chamber, the hot gas passage portion formed in the grate is a plurality of parallel slits, and an engaging portion is inserted into the slit, and the engaging portion is A reciprocating mechanism for reciprocating along the slit moving direction is provided. In this invention, the engaging portion does not need to be formed integrally with the rotor, but can be formed separately, whereby the gas passage can be formed without being restricted in the rotation direction of the rotor.

According to a sixth aspect of the present invention, the primary combustion chamber is disposed above the grate and the secondary combustion chamber is disposed below the grate, and the hot gas in the secondary combustion chamber is passed through the grate. In the incinerator configured to feed the primary combustion chamber, a hot gas supply unit is provided outside the grate, and a passage wall forming the gas supply unit is located closer to the primary combustion chamber than the grate surface. , And the hot gas in the secondary combustion chamber can always be supplied to the primary combustion chamber side even when waste is deposited on the grate surface. According to this invention, even if the waste gas blocks the hot gas passage of the grate in the early stage of combustion, or even if the hot gas passage of the grate accidentally closes the deposit, Since a passage for supplying the hot gas in the secondary combustion chamber to the primary combustion chamber is secured by the gas supply section, smooth combustion can be guaranteed. Further, even in a normal combustion state, the gas can be burned so as to enclose large waste such as a disposable diaper by the gas supply unit located on the lower surface of the grate and the outside thereof, and efficient combustion becomes possible.

According to a seventh aspect of the present invention, in addition to the sixth aspect, a second grate is provided at the bottom of the secondary combustion chamber below the first grate. The hot gas passages provided on the grate are shifted in position so that they do not coincide in the vertical projection direction. It should be noted that opening the hot gas passage portion so as to be displaced so as not to coincide in the vertical projection direction means that the hot gas passage portion is provided with a shifted pitch position, and is formed by a combination of a ring slit circle and a parallel slit. May be.

According to this invention, unburned components may fall below the first grate by scraping the hot gas passage provided in the first grate. In, a second grate is disposed below the first grate, and the hot gas passages provided in the respective grate are opened so as to be displaced so that they do not coincide in the vertical projection direction. Therefore, it is possible to easily catch the unburned components falling below the first grate.

According to an eighth aspect of the present invention, in addition to the sixth aspect, a second grate is provided at the bottom of the secondary combustion chamber below the grate and the second grate is provided. A wind box for introducing cooling air into the secondary combustion chamber from below the grid is provided.

Even in the case where unburned substances serving as nuclei of deposits fall on the second grate, the grate is cooled by the cooling air from below to melt the Na, Cl or K melting points (650 to 800).
° C) or less, there is no risk of deposits being formed in the hot gas passage of the grate.

[0023]

[0024]

According to a tenth aspect of the present invention, a ceramic plate or other heat-resistant material is alternately and horizontally mounted on both sides of the furnace wall at an outlet of the soaking chamber where the chimney is continuously provided. I do.

By forming the throttle passage 24 by the lower weir that raises the furnace bottom on the outlet side of the secondary combustion chamber, the following effects are obtained. Since the secondary combustion chamber is below the grate 1, unburned components easily fall off together with the ash. Unburned fuel that has fallen to the furnace bottom of the secondary combustion chamber is carried over by the combustion flow of the combustion burner and flows toward the soaking chamber without the lower weir. Such problems can be prevented. By providing the lower weir, a convection phenomenon occurs in the secondary combustion chamber where the temperature is high, and further complete combustion is achieved.

According to a ninth aspect of the present invention, a ceramic plate or other heat-resistant material is alternately mounted on both sides of the furnace wall in a horizontal direction at an outlet of the soaking chamber where a chimney is continuously provided. I do.

According to this invention, by ensuring the temperature and residence time of the fuel gas in the soaking chamber, the fuel gas can be made smokeless and odorless, and the ceramic plate also functions as a radiation converter. In addition, it is possible to combust and extinguish the unburned dust flowing into the soaking chamber.

[0029]

[0030]

[0031]

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, and are merely illustrative examples. Only.

1 and 2 are sectional views showing the configuration of a waste incinerator according to an embodiment of the present invention. FIG. 1 is a front sectional view, and FIG. 2 is a side sectional view. In FIG. 1, the inside of the furnace is placed above a primary combustion chamber (gasification combustion chamber) via a grate 1.
2, a lower part is divided into a secondary combustion chamber 3 and two upper and lower chambers. A diffuser 22 is provided on the inlet side of the secondary combustion chamber 3, and a suction chamber 23 is further provided on the upstream side thereof. The burner 4 is installed in a horizontal direction, and is arranged so that a fuel gas flow can be injected into the secondary combustion chamber 3 below the grate 1. The outlet side of the secondary combustion chamber 3 communicates with the soaking chamber 6 and the chimney 10 via the throttle passage 24.

The throttle passage 24 is formed so as to hang down between a lower weir 24a in which the furnace bottom at the outlet side of the secondary combustion chamber 3 is raised in a rectangular shape and the heat equalizing chamber 6 located above the lower weir 24a. Partition wall 24
b to form a narrower region. The reason why the throttle passage 24 is formed by the lower weir 24a that rises the furnace bottom on the outlet side of the secondary combustion chamber 3 is as follows.

Since the secondary combustion chamber 3 is located below the grate 1, unburned components easily fall off together with the ash. Unburned components that have fallen to the furnace bottom of the secondary combustion chamber 3 are carried over by the ejected flow of the ejector burner 4 and flow toward the soaking chamber 6 without the lower weir 24a, but the weir 24a is provided. This can prevent such a problem. Also, the provision of the weir 24a causes a convection phenomenon in the secondary combustion chamber 3 where the temperature is high, and further complete combustion is achieved.

On the other hand, the soaking chamber 6 has a reduced diameter at the outlet side where the chimney 10 is continuously provided, and porous ceramic plates 12 are alternately attached to the reduced diameter portion from both left and right side walls in a horizontal direction. By ensuring the temperature and residence time of the fuel gas inside 6, smokeless and odorless fuel gas is achieved. Incidentally, the porous ceramic plate 12 also functions as a radiation converter,
To burn and extinguish unburned dust that has flowed into the area. The height of the chimney 10 is set so that the inside of the furnace is maintained at a negative pressure.

Next, the structure of the primary combustion chamber 2 located above the grate 1 will be described. A drive motor 51 for rotating the stirring shaft 52 is mounted on the upper surface side of the primary combustion chamber 2. The driving motor 51 connects the stirring shaft 52 (hollow shaft) with a bolt 53 via a motor shaft 51 a. And the stirring shaft 52 is vertically penetrated into the primary combustion chamber 2,
The lower end is rotatably fitted to a support shaft 54 projecting vertically from the center of the grate 1. The stirring shaft 52 is formed as a hollow shaft, and the upper and lower ends thereof are connected to the motor shaft 51a and the support shaft 5a.
4, the mounting height of the stirring blade 55 attached to the stirring shaft 52 can be arbitrarily adjusted by adjusting the position of the bolt 53 connected to the motor shaft 51a up and down.

The stirring blade 55 has a flat triangular shape extending horizontally from the stirring shaft 52 toward the combustion chamber furnace wall. The stirring blade 55 alternates between the lower end position of the opening 57 of the inner lid 56 to be described later and the position where the grate 1 is attached. To be installed in multiple locations. The grate 1 has a circular shape along the rotation of the stirring blade 55, while the inside of the furnace has a rectangular cross section, and as shown in FIG. 2 and FIG. A gas vent 48 is provided in the gap with the lattice 1, and a knife-edge-shaped guide fin 49 is provided above the gas vent 48 so that the gas vent 48 is not blocked by waste. As a result, even in the initial stage of the combustion, the hot gas is introduced from the side of the secondary combustion chamber 3 into the primary combustion chamber 2 through the gas vent 48, and smooth combustion can be performed.

Next, the structure of the waste input section 5 will be described with reference to FIG. The refuse input section 5 is attached in contact with the opening 57 of the inner lid 56 of the primary combustion chamber 2, and is attached to the inner lid 5.
An outer lid 58, which is manually opened, is attached to the upper wall of the input section facing the inner wall 6. An upper space 6 around which the bucket 59 and the inner lid 56 can rotate between the outer lid 58 and the inner lid 56.
0, and a bucket 59 storage space is provided below the upper space 60. The bucket 59 orbits around the upper space 60 around a hinge 64 provided on the furnace outer wall at the lower end of the inner lid 56, and is configured so that waste can be put into the furnace through the inner lid opening 57. On the other hand, the inner lid 56 is configured to rotate in the upper space 60 around a hinge 65 provided at the upper end and stop at the ceiling position of the upper space 60.

Returning to FIG. 1, a gas circulation duct 8 is provided between the upper side of the primary combustion chamber 2 and the suction chamber 23 to which the ejector burner 4 on the inlet side of the secondary combustion chamber 3 is attached.
The structure is such that the pyrolysis gas of the waste gasified in the primary combustion chamber 2 is guided to the inlet side of the secondary combustion chamber 3 via the diffuser 22 by the suction force of the injection gas from the ejector burner 4. The ejector burner 4 comprises a fuel supply pipe, a primary air supply pipe, and a secondary air supply pipe concentrically surrounded in the same manner as in the prior art, and a primary air generated by a blower 16 is provided between these supplies. And secondary air is delivered.

In this configuration, the procedure from the input of waste to the end of combustion in the incinerator will be briefly described. First, the rotation timing of the bucket 59 and the inner lid 56 of the refuse input unit 5 is linked, and the operation procedure will be briefly described.
After throwing waste such as disposable diapers into the bucket 59 from the outer lid 58 of the refuse input section 5, the outer lid 58 is closed.
The inner lid 56 rotates to the ceiling position of the inner lid, and the inner lid opening 57 is opened.

The bucket 59 is operated by a switch (not shown)
After confirming that the inner lid 56 has been rotated to the ceiling position of the upper space 60, the circulation starts and the outer lid 5 is inserted into the furnace through the inner lid opening 57.
The waste is charged into the primary combustion chamber 2 in the furnace in a state where 8 is closed. At this time, the rotation timing of the stirring blade 550 is set such that the uppermost stirring blade 550 is positioned on the opposite side of the inner lid opening 57 so that the waste does not directly get on the uppermost stirring blade 550. . Immediately after the completion of the introduction of the waste, the inner lid 56 returns to the original position and closes the inner lid opening 57.

From the inner lid opening 57 at appropriate timing,
Waste, such as disposable diapers, charged and stored in the primary combustion chamber 2 on the grate 1 is subjected to combustion described later while being rotationally stirred by the stirring blades 55. That is, the waste 6 stored in the primary combustion chamber 2 on the grate 1 through the inner lid opening 57 partially disposes a part (about 30%) of the fuel gas of the burner 4 under the grate 1 and from the gas vent 48. By supplying the fuel to the combustion chamber 2, the fuel is partially burned and gasified (pyrolyzed gas). The pyrolysis gas generated by this partial combustion rises in the primary combustion chamber 2,
The fuel gas is guided to the suction chamber 23 through the circulation duct 8, is suction-mixed by the ejection of the fuel gas from the ejector burner 4, and is introduced into the secondary combustion chamber 3. The gas is completely burnt, and the fuel gas is smokelessly and odorlessly cleaned while maintaining the temperature and the residence time in the soaking chamber 6, and then discharged from the chimney 10 to the atmosphere.

When the waste is hospital waste mainly composed of disposable diapers, the grate 1 and the stirring blade 55 facing the grate 1 are preferably constructed as follows. 4A and 4B show the first embodiment showing the structure of the grate and the lowermost stirring blade facing the grate. FIG. 4A is a front view of a main part, and FIG. FIG. 4A is a cross-sectional view taken along the line AA of FIG. In the grate 1 formed in a circular shape in FIG. 1, a hot gas passage portion 31 is formed concentrically with a large number of ring circles, and a radial direction is formed on the lower surface of the grate 1 in order to maintain a space between the ring circles. Is fixedly provided.

On the other hand, the lowermost stirring blades 55A and 55B facing the grate 1 are two or more even-numbered plurality of blades symmetrically extending on both radial sides of the stirring shaft 52 located at the center of the grate 1. A plurality of scraping plates 33 (projecting portions) projecting from the lower surface side of each of the stirring blades 55A and 55B to the grate 1 side, and A round bar 34 (engaging portion) is provided between the plates 33 to enter the hot gas passage 31 and the stirring blades 55A, 55
The round bar 34 moves in the hot gas passage 31 following the rotation of B, so that the deposits formed in the passage 31 can be removed.

Further, the respective stirring blades 55A, 55A,
The scraping plate 33 and the round bar 34 projecting from the lower surface side of 5B
The left stirring blade 55A and the right stirring blade 55B protrude in a pitch circle shape having different radii. That is, the round bar 34 projecting from the lower surface of the left stirring blade 55A is 1 from the center,
The scraping plates 33 are provided at positions where they enter the hot gas passage portions 31 corresponding to the third and fifth pitch circles, and between and outside the pitch circles of the first, third and fifth pitch circles. On the other hand, the round bar 34 protruding from the right stirring blade 55B is located at a position where it enters the hot gas passage 31 corresponding to the second and fourth pitch circles from the center. It is provided between and outside the pitch circle.

According to this embodiment, the waste stored in the primary combustion chamber 2 is partially burned and gasified by the hot gas from the secondary combustion chamber 3, and this waste is, for example, disposable diapers. In the case of large-sized water-containing wastes, such as drying → carbonization → incineration sequentially from the outside, in this case, if the waste is placed without agitation and put on fire, the outer ashing part is insulated There is a case where the layer becomes a layer and the central portion is not burned and remains unburned (insufficient combustion).

In such a case, the stirring blades 55A, 55B of the double-blade structure are stirred at a position facing the grate 1 and a plurality of stirring blades 55A, 55B are provided on the lower surface side of the stirring blades 55 so as to protrude toward the grate 1 side. Grate 1 by the scraping plate 33
The upper surface is forcibly agitated to forcibly remove the incinerated portion outside the disposable diaper, and the carbonized portion to be burned is always exposed and agitated, thereby enabling effective combustion.

Also, when deposits are formed in the hot gas passage portion 31 of the grate 1 with Na, Cl, K, etc. (melting point 650-800 ° C.) as nuclei on the grate 1 by burning a disposable diaper or the like. Also, the round bar 34 moves in the hot gas passage portion 31 following the rotation of the stirring blades 55A and 55B, and can remove the deposits formed in the passage portion 31. The gas vent hole is not blocked.

Furthermore, even when a large number of ring hot gas passages 31 are formed on the grate 1, both stirring blades 5
By alternately forming the pitch circles of the engaging portions 5A and 55B, all the hot gas passage portions 31 can be scraped.

FIG. 5 is a second embodiment showing the arrangement of the grate and the configuration of the lowermost stirring blade facing the grate.
(A) is a front view of a main part, and (B) is a cross-sectional view taken along the line BB of (A), showing a positional relationship between a hot gas passage portion of the grate and a round bar as an engagement portion. In this embodiment, the lowermost stirring blade 55
A, below the first grate 1A facing 55B, the second grate 1B is arranged in a plurality of stages up and down,
Hot gas passage portions 31A provided in the respective grate 1A, 1B,
The opening 31B is shifted in position so that 31B does not coincide in the vertical projection direction.

It is to be noted that the opening of the hot gas passage portion 31 with the position shifted so that the hot gas passage portion 31 does not coincide in the vertical projection direction means that
The hot gas passage portion 31 may be formed by shifting the pitch position, and may be formed by a combination of a ring slit circle and a parallel slit. Further, the extending directions of the parallel slits may intersect in a parallel plane. It may be open.

In this embodiment, both the first grate 1A and the second grate 1B have the hot gas passage portions 31A, 31B formed by parallel slits, and the slit positions are opened by shifting the positions to the left and right. ing. In this embodiment, since the hot gas passage 31A formed in the grate 1A is a plurality of parallel slits, while the stirring blades 55A and 55B are in the rotation direction, a round bar engaged in the slit is used. 34 cannot be provided on the stirring blades 55A, 55B side. Therefore, a reciprocating member 37 reciprocating along the slit moving direction is provided on the lower surface side of the first grate 1A.
The reciprocating member 3 is provided so as to extend in a direction orthogonal to
A round bar 34 that penetrates each slit 31 is provided on 7.

The round bar 34 is connected to the stirring blades 55A and 55B.
It is not necessary to form the gas passage portion 31 integrally with the gas passage portion 31. Thus, the gas passage portion 31 can be formed in an arbitrary shape without being restricted in the rotation direction of the stirring blades 55A and 55B. Further, in the present embodiment, a second grate 1B is provided below the first grate 1A, and the hot gas passage portions 31A, 31B provided in the respective grate 1A, 1B are directed in the vertical projection direction. Since the openings are shifted so that they do not coincide with each other, unburned components falling below the first grate 1A can be easily captured.

FIG. 6 shows an incinerator according to another embodiment of the present invention, in which a second grate 1B is provided at the bottom of the secondary combustion chamber 3 below the first grate 1A. A wind box 39 into which the cooling air 38 is introduced into the secondary combustion chamber 3 from below the second grate 1B is provided.

According to this embodiment, even when the unburned material serving as the nucleus of the deposit falls on the second grate 1B, the grate 1B is cooled by the cooling air 38 from below.
Since it is cooled to the melting point of a, Cl or K (650 to 800 ° C.) or less, there is no possibility that deposits are formed on the hot gas passage portion 31B of the grate 1B.

[0057]

As described above, according to the present invention, wastes are stored in the primary combustion chamber, and Na, Cl, K, etc. (melting point 650 to 800) are placed on the grate by burning paper diapers and the like.
℃) as a nucleus, and smoothly prevents the gas ventilation part of the grate which supplies the hot gas from the secondary combustion chamber from being blocked, and even if it is blocked, the secondary combustion chamber A further reduction in the supply of hot gas can be prevented as much as possible, whereby a smooth waste incineration process can be performed.

[Brief description of the drawings]

FIG. 1 and FIG. 2 are sectional views showing the configuration of a waste incinerator according to an embodiment of the present invention, and FIG. 1 is a front sectional view thereof.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a cross-sectional view taken along line AA of FIG. 1, showing a configuration in which a gas vent hole is provided in a gap between a furnace grate at a corner inside the furnace.

4A is a first embodiment showing a configuration of a grate and a lowermost stirring blade facing the grate, FIG.
(B) is a sectional view taken along line AA of (A), showing a positional relationship between a heat passage portion of the grate and a round bar as an engaging portion.

FIG. 5 is a second embodiment showing the arrangement of the grate and the configuration of the lowermost stirring blade facing the grate. FIG. 5 (A) is a front view of a main part, FIG. It is BB sectional drawing of (A) which shows the positional relationship of the round bar as an engaging part.

FIG. 6 is a schematic view showing an incinerator according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a configuration of a conventional waste incinerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A, 1B Grate 2 Primary combustion chamber (gasification combustion chamber) 3 Secondary combustion chamber 4 Ejector burner 5 Garbage charging part 6 Equalizing chamber 10 Chimney 12 Ceramic plate 23 Suction chamber 24 Restrictor passage 24a Lower dam 33 Scratching Stripping plate (projecting portion) 31, 31A, 31B Hot gas passage 34 Round bar 48 Gas vent 49 Guide fin 52 Stirring shaft 55, 55A, 55B, 550 Stirring blade 56 Inner lid 57 Opening 58 Outer lid 59 Bucket

Continued on the front page (51) Int.Cl. ⁷ Identification code FI F23G 5/44 ZAB F23G 5/44 ZABC (72) Inventor Yuichi Hino 5-717-1 Fukahori-cho, Nagasaki-shi, Nagasaki Engineering Co., Ltd. 56) References JP-A-10-246412 (JP, A) JP-A-55-53615 (JP, A) JP-A-1-263411 (JP, A) Japanese Utility Model Laid-Open No. 49-30937 (JP, U) (58) ) Field surveyed (Int.Cl. ⁷ , DB name) F23H 15/00 F23G 5/00 119 F23G 5/027 ZAB F23G 5/14 ZAB F23G 5/44 ZAB

Claims (10)

(57) [Claims] 1. A primary combustion chamber is arranged on the upper side of a grate and a secondary combustion chamber is arranged on a lower side, and a part of hot gas in the secondary combustion chamber is transferred to the primary combustion chamber via the grate. In the incinerator configured to be supplied to the primary combustion chamber, and disposed of via the combustion gas blocking inner lid.
Bucket for storing objects and throwing waste into the bucket
A waste input unit having an outer lid,
After opening, the waste is discharged into the primary combustion chamber through the bucket.
Waste incinerator, characterized in that was introduced configured to be able to wastes. 2. A stirring blade which moves in a plane parallel to the grate in the primary combustion chamber, and a hot gas passage extending to the grate along the moving direction of the stirring blade. Are provided, and an engagement portion is provided on the lower surface side of the stirring blade to enter the hot gas passage portion, and the engagement portion moves in the hot gas passage portion following the movement of the stirring blade, 2. The method according to claim 1 , further comprising the step of removing deposits on the passage.
2. The waste incinerator according to 1 . 3. The waste incinerator according to claim 2, wherein a moving direction of the rotor blade facing the grate is a rotation direction, and a hot gas passage formed in the grate is an arc or a ring circle. The rotating blades have a multiple blade structure extending radially on both sides from the center of the grate, and a plurality of protrusions projecting toward the grate are provided on the lower surface side of each stirring blade. Waste incinerator. 4. The waste incinerator according to claim 2, wherein a moving direction of the rotor blade facing the grate is a rotation direction, and a hot gas passage formed in the grate is an arc or a ring. The rotating blade has a multi-blade structure in which the rotating blade extends radially on both sides of the grate center from the center of the grate, and is provided on the lower surface side of each of the stirring blades. The waste incinerator according to claim 2 , wherein the joining portions are located in a pitch circle having different radii. 5. A reciprocating device in which a hot gas passage portion formed in the grate is a plurality of parallel slits, an engaging portion is inserted into the slit, and the engaging portion reciprocates along the slit moving direction. The waste incinerator according to claim 2, further comprising a moving mechanism. 6. A primary combustion chamber is disposed on the upper side of the grate and a secondary combustion chamber is disposed on the lower side, and hot gas in the secondary combustion chamber is supplied to the primary combustion chamber via the grate. In the incinerator, a hot gas supply unit is provided outside the grate ,
The primary wall of the passage wall constituting the gas supply section is
The waste is extended upward toward the firing chamber and the waste
The hot gas in the secondary combustion chamber is in the primary combustion chamber even when
A waste incinerator characterized in that it can always be supplied to the incinerator. 7. At the bottom of the secondary combustion chamber below the grate,
7. A method according to claim 6, wherein the second grate is provided and the hot gas passages provided in the respective grate are opened so as to be displaced from each other so that they do not coincide in the vertical projection direction.
The waste incinerator as described. 8. At the bottom of the secondary combustion chamber below the grate,
7. A waste incinerator according to claim 6, further comprising a second grate, and a wind box for introducing cooling air into the secondary combustion chamber from below the second grate. . 9. A primary combustion chamber is disposed above the grate and a secondary combustion chamber is disposed below the grate, and hot gas in the secondary combustion chamber is supplied to the primary combustion chamber via the grate. In the incinerator, a soaking chamber is provided via a lower weir that raises the bottom of the secondary combustion chamber at the outlet side, and the area between the secondary combustion chamber and the soaking chamber is narrowed. A waste incinerator characterized in that the waste incinerator is communicated through a narrowed passage. 10. The waste incinerator according to claim 9, wherein a ceramic plate or another heat-resistant material is alternately and horizontally attached to both sides of the furnace wall at an outlet side of the soaking chamber where the chimney is continuously provided.