JP2003083518A - Waste disposal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a heating efficiency and save energy. SOLUTION: A waste disposal device comprises a heating chamber 20 which surrounds a carbonizing vessel 21 for housing waste, a heating chamber outlet opened in the heating chamber 20, a heating chamber inlet 26 facing the heating chamber 20 corresponding to the substantially central part of the bottom surface of the carbonizing vessel 21 and a heating means 27 corresponding to the heating chamber inlet 26. Then, the heating means 27 starts a combustion. Generated combustion gas is mixed with air jetted from an air injection port 33 to form heating gas in a carbonizing and combustion chamber 28. The heating gas entering from the heating chamber inlet 26 to the heating chamber 20 collides with the substantially central part of the bottom surface of the carbonizing vessel 21 to heat to a high load. Then, the heating gas flows toward the heating chamber outlet 24 to heat the side surface of the carbonizing vessel 21. As a result, the waste B comes into contact with the bottom surface of the highest temperature in the carbonizing vessel 21, so that the waste is efficiently heated due to a thermal conduction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste treatment apparatus for dry-distilling waste such as food waste by using heating means, and relates to control of its operation.

[0002]

2. Description of the Related Art A conventional waste treatment device of this type is disclosed in Japanese Patent Application Laid-Open No.
The one described in Japanese Patent Application Publication No. 000-26863 is known. As shown in FIG. 6, a conventional waste treatment apparatus utilizing combustion heat is as follows: 1 is a dry distillation container for storing waste and performing dry distillation; 2 is a heating chamber configured to surround the dry distillation container 1;
Is a heating means including a burner for generating heat necessary for dry distillation and burning the dry distillation gas generated in the dry distillation container 1, 4 is a dry combustion chamber for promoting combustion, and 5 is an exhaust stack for discharging exhaust gas. 6 is a heating gas passage for conveying the gas generated in the dry distillation combustion chamber 4 to the heating chamber 2, 7 is a dry distillation gas passage for conveying the dry distillation gas generated in the dry distillation container 1 to the dry distillation combustion chamber 4, and 8 is a combustion fan. Is an air supply unit of.

In the above structure, the waste A such as raw garbage is stored in the dry distillation container 1 and the heating means 3 is burned,
The generated combustion gas passes through the heating gas passage 6 to reach the heating chamber 2, heats the carbonization container 1, and is discharged from the exhaust pipe 5 to the outside. The waste A stored in the dry distillation container 1 heated by the combustion gas is pyrolyzed and dry-distilled, and at the same time, the dry-distillation gas or steam which is a combustible gas is generated. These dry distillation gas and steam reach the dry distillation combustion chamber 4 through the dry distillation gas passage 7, and are mixed with the air supplied from the air supply unit 8 and the combustion gas generated from the heating means 3 and burned. The heating gas generated by combustion reaches the heating chamber 2 through the heating gas passage 6 and is supplied as heat necessary for dry distillation.

[0004]

However, since the heating gas asymmetrically heats the outer wall of the dry distillation container 1, there is a problem that the dry distillation container 1 has an uneven temperature distribution. Therefore, in order to efficiently heat the waste A, it is necessary to devise a method for stirring the inside of the dry distillation container 1. Further, the heating gas passage 6 is long since it communicates with the bottoms of the dry distillation combustion chamber 4 and the heating chamber 2, and since the heating gas passes therethrough, the temperature becomes extremely high, so that the heat radiation loss is large, and the inside of the waste treatment device is large. However, there was a problem that the temperature rise was large.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a waste treatment apparatus capable of improving heating efficiency and saving energy.

[0006]

In order to solve the above problems, the present invention provides a heating chamber surrounding a dry distillation container for storing waste, a heating chamber outlet opening in the heating chamber, and a bottom surface of the dry distillation container. A heating chamber inlet facing the heating chamber corresponding to the center, and heating means corresponding to the heating chamber inlet are provided.

According to the above-mentioned invention, the heating gas flowing into the heating chamber from the heating chamber inlet collides with substantially the center of the bottom surface of the dry distillation container and is heated to a high load. After that, the heating gas flows toward the outlet of the heating chamber to heat the side surface of the dry distillation container. As a result, the temperature distribution of the dry distillation container gradually decreases from the bottom surface to the side surfaces, so that the waste on the bottom surface of the dry distillation container can be efficiently heated. Moreover, since the distance between the heating means and the inlet of the heating chamber is short, the heat radiation loss can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 corresponds to a heating chamber that surrounds a dry distillation container that stores waste, a heating chamber outlet that is open to the heating chamber, and approximately the center of the bottom surface of the dry distillation container. A heating chamber inlet facing the heating chamber and a heating means corresponding to the heating chamber inlet. Then, the heating gas generated from the heating means and flowing into the heating chamber from the inlet of the heating chamber collides with the substantially center of the bottom surface of the dry distillation container, and heats to a high load. After that, the heating gas flows toward the outlet of the heating chamber and also heats the side surface of the dry distillation container. As a result, the waste placed in the dry distillation container is in contact with the hottest bottom surface of the dry distillation container, so that it is efficiently heated by heat conduction.
Moreover, since the distance between the heating means and the inlet of the heating chamber is short, the heat radiation loss can be reduced.

The invention as defined in claim 2 is particularly characterized by claim 1.
A plurality of heating chamber outlets are opened in the heating chamber so as to correspond to the side surfaces of the dry distillation container. Then, the heating gas that has collided with approximately the center of the bottom surface of the dry distillation container flows toward the outlets of the plurality of heating chambers, and widely heats the bottom surface of the dry distillation container. As a result, since the waste put in the dry distillation container is wide and is in contact with the high temperature bottom surface, it is heated very efficiently and stably by heat conduction.

The invention as defined in claim 3 is particularly defined by claim 1.
The dry distillation container described in 1. is configured in a substantially columnar or polygonal columnar shape. Then, the heating gas generated from the heating means and flowing into the heating chamber from the inlet of the heating chamber collides with the substantially center of the bottom surface of the dry distillation container, and heats to a high load. Then, the heating gas flows substantially uniformly toward the outlets of the plurality of heating chambers, while heating all side surfaces of the carbonization container. As a result, the temperature distribution of the carbonization container is decreasing uniformly from the bottom surface to the side surface, so that the waste material on the bottom surface of the carbonization container has heat conduction from the high temperature bottom surface and the side surface of uniform temperature distribution. It can be heated very efficiently by radiation from.

The invention as defined in claim 4 is particularly characterized by claim 1.
A positioning spacer is provided in the gap between the inner wall of the heating chamber and the outer wall of the dry distillation container. Since the positioning spacer can accurately set the gap between the heating chamber and the dry distillation container, the gap can be narrowed to the range where the passage resistance is allowed. As a result, the flow velocity of the heating gas is high in the gap between the heating chamber and the dry distillation container, and the heat transfer coefficient is improved, so that the heating gas can efficiently heat the dry distillation container. Further, the waste treatment device can be made compact.

The invention as defined in claim 5 is particularly characterized by claim 1.
The dry distillation container is provided with a gas supply unit for supplying dry distillation gas to the upstream side of the dry distillation combustion chamber provided near the bottom surface of the dry distillation container, and a dry distillation gas pipe connecting the gas supply unit and the dry distillation container. Further, since the gas supply unit for supplying the dry distillation gas to the upstream side of the dry distillation combustion chamber is provided near the bottom of the dry distillation container, the dry distillation gas pipe is short, and the heat dissipation loss from the dry distillation gas pipe is suppressed.

The invention according to claim 6 is particularly characterized by claim 1.
And a collecting exhaust passage provided in the collecting unit. Then, the exhaust gas flows into the plurality of exhaust passages from the plurality of heating chamber outlets, and then flows into the collecting portion. That is, since the exhaust gas can be discharged only from the collective exhaust passage, the processing of this exhaust gas is easy.

The invention as defined in claim 7 is particularly defined by claim 1.
And a small-diameter communication passage provided between the collecting portion and the collection exhaust passage, and an air port opened in the collection exhaust passage near the communication passage. Then, the air is drawn from the air port by the exhaust gas flowing into the collective exhaust passage from the communication passage, so that the temperature of the exhaust gas can be lowered. Further, when the waste treatment device is stopped due to a power failure or the like, the dry distillation gas mixes with the air drawn in from the air port to form a premixed gas and is ejected from the collective exhaust passage. At this time, even if this premixed gas is ignited by some ignition source, it immediately backfires, flames are maintained in the air ports, and combustion is completed in the collective exhaust passage. As a result, it is possible to prevent the flame from ejecting from the waste treatment device.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view showing the structure of a waste treatment apparatus according to Embodiment 1 of the present invention.

In FIG. 1, reference numeral 20 denotes a bottomed heating chamber into which a square column-shaped dry distillation container 21 for storing waste such as food waste is inserted. Reference numeral 22 denotes a heat insulating material that surrounds the outer periphery of the heating chamber 20 and is held by the outer cylinder 23. The heating chamber outlet 24 is open to the heating chamber 20 in correspondence with the side surface of the dry distillation container 21. An exhaust passage 25 cuts through the heat insulating material 22 and communicates with the heating chamber outlet 24. 26 is an inlet of the heating chamber, which corresponds to the approximate center of the bottom surface of the dry distillation container 21.
Facing. Reference numeral 27 denotes a heating means composed of a burner using natural gas or kerosene as a fuel, and communicates with the heating chamber inlet 26 via a cylindrical carbonization combustion chamber 28. Reference numeral 29 is a ring-shaped gas supply portion provided between the dry distillation combustion chamber 28 and the heating means 27. Reference numeral 30 denotes a gas introduction pipe, which is a dry distillation container 21.
And the gas supply unit 29 are in communication with each other. Reference numeral 31 denotes a gas ejection port that opens on the inner peripheral surface of the gas supply unit 29 and ejects a combustible gas toward the central axis of the carbonization combustion chamber 28. 32
Is an air supply unit composed of a fan, and an air ejection port 33 for ejecting air is provided downstream of the gas supply unit 29. Three
An inner lid 4 forms a space connecting the dry distillation container 21 and the gas introduction pipe 30. Reference numeral 35 is a lid provided outside the inner lid 34.

The operation and action of the waste treatment apparatus configured as described above will be described below.

First, the lid 35 and the inner lid 34 are opened, the waste B such as food waste is inserted into the dry distillation container 21, and then the lid 35 and the inner lid 34 are sealed again. Then, the heating means 27 starts combustion, and the generated combustion gas is discharged from the air jet port 3 in the carbonization combustion chamber 28.
It mixes with the air ejected from 3 to form a heated gas. The heating gas flowing into the heating chamber 20 through the heating chamber inlet 26 collides with the substantially center of the bottom surface of the dry distillation container 21 and heats it with a high load. Then, the heating gas flows toward the heating chamber outlet 24 to heat the side surface of the dry distillation container 21. As a result, the temperature distribution of the dry distillation container 21 decreases from the bottom surface to the side surfaces. Since the waste B is in contact with the hottest bottom surface of the dry distillation container 21, it is efficiently heated by heat conduction.

Subsequently, the temperature inside the dry distillation container 21 rises, and steam and dry distillation gas are sequentially generated from the waste B and flow into the gas supply unit 29 through the gas introduction pipe 30.

Thereafter, the dry distillation gas which is a combustible gas is ejected from the gas ejection port 31 toward the central axis of the dry distillation combustion chamber 28. At that time, the dry distillation gas is ignited by the combustion gas generated from the heating means 27 and diffuse-combusted while diffusing into the air jetted from the air jet port 33. As a result, the dry distillation gas and steam are burnt (deodorized, cleaned), and the heat generated is used to heat the dry distillation container 21. Further, the distance between the heating means 27 and the heating chamber inlet 26 is shorter than that in the conventional example, and the air in the air supply part 32 recovers heat from the inner wall of the carbonization combustion chamber 28, so that the heat radiation loss can be reduced and energy can be saved. .

As described above, in the present embodiment, the heating chamber inlet 26 facing the heating chamber 20 and the heating means 27 communicating with the heating chamber inlet 26 are provided so as to correspond to the approximate center of the bottom surface of the dry distillation container 21. Since the dry distillation combustion chamber 28 is provided, the heating gas collides with the center of the bottom surface of the dry distillation container 21 and heats it with a high load. As a result, since the waste B is in contact with the bottom of the dry distillation container 21 having the highest temperature, the waste B is efficiently heated by heat conduction.

(Embodiment 2) FIG. 2 is a plan sectional view of a waste treatment apparatus according to Embodiment 2 of the present invention.
In FIG. 2, the difference from the configuration of the first embodiment is that a plurality of heating chamber outlets 36 and exhaust passages 37 are evenly opened in the heating chamber 39 corresponding to the side surface of the dry distillation container 38.

The operation and action of the waste treatment apparatus configured as described above will be described below. Heating means 27
When the combustion starts, the combustion gas generated is generated by the carbonization combustion chamber 2
At 8, the mixture is mixed with the air ejected from the air ejection port 33 to form a heating gas. The heating gas flowing into the heating chamber 20 through the heating chamber inlet 26 collides with the substantially center of the bottom surface of the dry distillation container 21 and heats it with a high load. After that, the heating gas is supplied to the heating chamber outlets 3
While flowing toward 6, the bottom of the dry distillation container 38 is heated widely. As a result, the waste B put in the dry distillation container 38
Is in wide contact with the high temperature bottom surface of the dry distillation container 38, so that it is heated very efficiently and stably by heat conduction.

As described above, in this embodiment, the heating chamber outlet 36 corresponds to the side surface of the carbonization container 38 and the heating chamber 39.
Since the plurality of openings are evenly opened, the heating gas flows toward the plurality of heating chamber outlets 36 and widely heats the bottom surface of the dry distillation container 38. As a result, the waste B is wide and the dry distillation container 38
Since it is in contact with the high temperature bottom surface of the, it is heated very efficiently and stably by heat conduction.

(Embodiment 3) FIG. 2 is a plan sectional view of a waste treatment apparatus according to Embodiment 3 of the present invention.
In FIG. 2, the difference from the configuration of the first embodiment is that the dry distillation container 38 has a cylindrical shape. The operation and action of the waste treatment apparatus configured as described above will be described below.

When the heating means 27 starts combustion, the generated combustion gas is mixed with the air ejected from the air ejection port 33 in the carbonization combustion chamber 28 to form a heating gas. Heating chamber entrance 2
The heating gas flowing from 6 into the heating chamber 20 collides with the approximate center of the bottom surface of the dry distillation container 21 and heats to a high load. After that, since the distance from the substantially center of the bottom surface of the dry distillation container 38 to the side surface is substantially the same, the heating gas spreads substantially uniformly toward the plurality of heating chamber outlets 36, and directly heats all the side surfaces of the dry distillation container 38.
As a result, the temperature distribution of the dry distillation container 38 decreases uniformly from the bottom surface to the side surfaces. The waste B put in the dry distillation container 38 is heated very efficiently and uniformly by heat conduction from the high temperature bottom surface of the dry distillation container 38 and radiation from the side surface of the dry distillation container 38.

As described above, in the present embodiment, since the dry distillation container 38 has a cylindrical shape, the heating gas colliding with the substantially center of the bottom surface of the dry distillation container 38 spreads substantially uniformly toward the plurality of heating chamber outlets 24. . As a result, the waste B is heated very efficiently and uniformly by heat conduction from the hot bottom surface of the carbonization container 38 and radiation from the side surface of the carbonization container 38. The shape of the dry distillation container may be a polygonal prism, although the effect is slightly inferior to that of a cylinder.

(Embodiment 4) FIG. 3 is a sectional view showing the essential parts of a waste treatment apparatus according to Embodiment 4 of the present invention. In FIG. 3, the difference from the configuration of the first embodiment is that a positioning spacer 42 is provided which projects the inner wall of the heating chamber 40 toward the dry distillation container 41.

The operation and action of the waste treatment apparatus configured as above will be described below. The position of the dry distillation container 41 inserted into the heating chamber 40 is determined by the positioning spacer 42. The positioning spacer 42 can arbitrarily and accurately set the gap L between the inner wall of the heating chamber 40 and the outer wall of the carbonization container 41. That is, the gap L is narrowed to the range where the passage resistance is allowed (the range in which the performance of the heating means 27 and the air supply part 32 can be maintained), and the gap L can be made almost the same at any place. As a result, the flow velocity of the heating gas is high in the gap L and the heat transfer rate is improved, so that the heating gas can efficiently heat the side surface of the dry distillation container 21. The outer wall of the dry distillation container 41 may be projected toward the heating chamber 40 to form a positioning spacer, or may be a separate component.

As described above, in this embodiment, since the positioning spacer 42 is provided which projects the inner wall of the heating chamber 40 toward the dry distillation container 41, the gap L is narrowed to the range where passage resistance is allowed, and The gap L can be made almost the same at any place. As a result, the heating gas is efficiently used in the dry distillation container 2.
One side can be heated.

(Embodiment 5) FIG. 4 is a sectional view showing the construction of a waste treatment apparatus according to Embodiment 5 of the present invention.
In FIG. 4, the difference from the configuration of the first embodiment is that the gas supply unit 43 is provided near the bottom of the dry distillation container 44,
4 is connected to the gas supply unit 43, and a dry distillation gas pipe 45 into which the dry distillation gas generated from the dry distillation container 44 flows is provided. Further, a dry distillation combustion chamber 46 and a heating means 47 are provided laterally along the bottom surface of the dry distillation container 44.

The operation and action of the waste treatment apparatus configured as described above will be described below. Heating means 47
When the combustion starts, the combustion gas generated is generated by the carbonization combustion chamber 4
At 6, the mixture is mixed with the air ejected from the air ejection port 33 to form a heating gas. Since the heating gas heats the dry distillation container 44, the temperature inside the dry distillation container 44 rises, and steam and dry distillation gas are sequentially generated from the waste B and flow into the gas supply unit 43 through the gas introduction pipe 45.

Then, the carbonization gas is ejected from the gas ejection port 31 toward the central axis of the carbonization combustion chamber 46. At that time, the dry distillation gas is ignited by the combustion gas generated from the heating means 47, and diffuses and burns while diffusing into the air jetted from the air jet port 33. As a result, the carbonization gas is burned and the heat generated is used to heat the carbonization container 44. Also,
Compared with the conventional example, the gas supply unit 4 is provided near the bottom of the dry distillation container 44.
Since 3 is provided, the heat dissipation loss from the dry distillation gas pipe 45 can be suppressed as the dry distillation gas pipe 45 becomes shorter.

As described above, in this embodiment, the gas supply part 43 is provided near the bottom of the dry distillation container 44, and the dry distillation gas pipe 45 connecting the dry distillation container 44 and the gas supply part 43 is provided. As the gas pipe 45 becomes shorter, the dry distillation gas pipe 4
The heat radiation loss from 5 can be suppressed.

(Embodiment 6) FIG. 4 is a sectional view showing the construction of a waste treatment apparatus according to Embodiment 6 of the present invention.
In FIG. 4, the difference from the configuration of the fifth embodiment is that a collecting portion 48 that covers the plurality of exhaust passages 25 and a collecting exhaust passage 49 are provided in the collecting portion 48.

The operation and action of the waste treatment apparatus configured as described above will be described below. Dry distillation container 44
The heating gas that has heated the side surface of the above flows into the plurality of exhaust passages 25 from the plurality of heating chamber outlets 24, and then flows into the collecting portion 48 as exhaust gas. Subsequently, since this exhaust gas can be discharged only from the collective exhaust passage 49, the processing of the exhaust gas is easy.

As described above, in this embodiment, since the collecting portion covering the plurality of heating chamber outlets and the collecting exhaust passage provided in the collecting portion are provided, the exhaust gas can be discharged only from the collecting exhaust passage. Easy to process gas.

(Embodiment 7) FIG. 5 is an enlarged sectional view of the waist of a waste treatment apparatus according to Embodiment 5 of the present invention. In FIG. 5, a difference from the configuration of the sixth embodiment is that a small-diameter connecting passage 50 is provided between the collecting portion 51 and the bottom surface of the collecting exhaust passage 52, and the collecting exhaust passage 52 near the connecting passage 50.
Is a point where a plurality of air ports 53 are opened on the bottom surface of the.

The operation and action of the waste treatment apparatus configured as described above will be described below. Dry distillation container 44
The heating gas that has heated the side surface of the above flows into the plurality of exhaust passages 25 from the plurality of heating chamber outlets 24, and then flows into the collecting portion 51. Subsequently, when the heated gas is ejected from the small-diameter communication passage 50 to the large-diameter collective exhaust passage 49, a plurality of air ports 53 are provided.
Intake air from and mix. As a result, low-temperature exhaust gas is ejected from the collective exhaust passage 49, improving safety.

When the waste treatment equipment is stopped due to a power failure or the like, the temperature drop of the dry distillation container 44 due to the heat capacity is slow,
Generation of dry distillation gas from the dry distillation container 44 continues for a long time. Then, the dry distillation gas flows into the plurality of exhaust passages 25 from the plurality of heating chamber outlets 24, and then flows into the collecting portion 51. Then, when the dry distillation gas is ejected from the small-diameter communication passage 50 to the large-diameter collective exhaust passage 49, the air is drawn in from a plurality of air ports 53 and mixed to form a premixed gas. Then, when the premixed gas is ejected from the collective exhaust passage 49, even if the premixed gas is ignited by some ignition source, it immediately backfires to hold the flame in the air port, and the combustion is completed in the collective exhaust passage. As a result,
It is possible to prevent the flame from ejecting from the collective exhaust passage 49.

In the seventh embodiment, the small diameter communication passage 5 is used.
Although 0 is provided, the point is that the heating gas or dry distillation gas itself can suck air from the air port. As described above, in the present embodiment, the collective exhaust passage 5 near the communication passage 50.
Since the air port 53 is opened at 2, the temperature of the exhaust gas or dry distillation gas ejected from the collective exhaust passage 49 is lowered, and even if the premixed gas of dry distillation gas is ignited by some ignition source, the air port is immediately opened. It is possible to secure safety by flashing back to 53.

[0043]

As described above, according to the invention described in claims 1 to 7, it is possible to improve the heating efficiency and save energy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the configuration of a waste treatment device according to a first embodiment of the present invention.

FIG. 2 is a plan cross-sectional view of a waste treatment device according to embodiments 2 and 3 of the present invention.

FIG. 3 is a cross-sectional view of essential parts of a waste treatment device according to a fourth embodiment of the present invention.

FIG. 4 is a cross-sectional view showing the configuration of a waste treatment device according to embodiments 5 and 6 of the present invention.

FIG. 5 is an enlarged cross-sectional view of a main part of a waste treatment device according to a seventh embodiment of the present invention.

FIG. 6 is a block diagram of a conventional waste treatment device.

[Explanation of symbols]

20, 36, 40, 44 Heating chamber 21, 38, 41 Dry distillation container 22,47 heating means 24, 36 Heating chamber outlet 26 Heating chamber entrance 27, 47 heating means 29, 43 Gas supply section 30, 45 Dry distillation gas pipe 42 Positioning spacer 48, 51 Assembly 49, 52 Collective exhaust passage 50 connecting passage 53 Air port

Continued front page    (72) Inventor Masanobu Kawai             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 3K061 AB02 AC01 AC12 BA06                 3K062 AA19 AB02 AC01 EA01 EB46                 4D004 AA03 BA03 CA24 CA27 CA48                       CB02 CB34

Claims (7)

[Claims] 1. A heating chamber that surrounds a dry distillation container that stores waste, a heating chamber outlet that opens to the heating chamber, and a heating chamber inlet that faces the heating chamber in a substantially central portion of the bottom surface of the dry distillation container. And a waste treatment device provided with heating means corresponding to the inlet of the heating chamber. 2. The waste treatment apparatus according to claim 1, wherein a plurality of heating chamber outlets are opened in the heating chamber so as to correspond to the side surfaces of the dry distillation container. 3. The waste treatment apparatus according to claim 1, further comprising a dry distillation container having a substantially columnar shape or a polygonal columnar shape. 4. The waste treatment device according to claim 1, further comprising a positioning spacer provided in a gap between an inner wall of the heating chamber and an outer wall of the carbonization container. 5. A gas supply unit for supplying a carbonization gas to an upstream side of a carbonization combustion chamber provided in the vicinity of the bottom of the carbonization container, and a carbonization gas pipe connecting the gas supply unit and the carbonization container. Item 1. The waste treatment device according to item 1. 6. The waste treatment apparatus according to claim 2, further comprising: a collecting portion that covers the outlets of the plurality of heating chambers, and a collecting exhaust passage provided in the collecting portion. 7. The waste treatment apparatus according to claim 6, further comprising a small-diameter communication passage provided between the collecting portion and the collection exhaust passage, and an air port opened in the collection exhaust passage near the communication passage.