JP2003156207A - Kiln type gasifying furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten length of the furnace. SOLUTION: A kiln body 1 comprising an inner cylinder 3 and an outer cylinder 2 and having a heating channel 4 between the inner and outer cylinders is constituted, and installed horizontally rotatably with the outlet 3b side of the inner cylinder 3 tilted down. The inlet 3a side of the inner cylinder 3 is provided with an input hopper 5 via a dust feeder 6, and the outlet 3b side is provided with a separating chamber 7 for separating pyrolysis gas 9 and pyrolysis residue 10 and taking them out. The inner wall surface of the inner cylinder 3 is provided with many stages of substantially horse-shoe gates 14 having a partially circumferentially cut notch 15 in the axial core direction. When wastes 8 are supplied into the inner cylinder 3, moved from the inlet 3a to the outlet 3b, and indirectly heated by hot air 11 passed through the heating channel 4 to be thermally decomposed, the wastes 8 moved from the inlet 3a side of the inner cylinder 3 to the outlet 3b side are reserved in an inlet side surface part of each gate 14 for a desired period every time they reach each gate 14. Thus, time taken for the wastes 8 to arrive from the inlet 3a of the inner cylinder 3 to the outlet 3b is extended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kiln type gasification furnace for pyrolyzing and gasifying waste such as municipal solid waste.

[0002]

2. Description of the Related Art In recent years, waste materials such as municipal waste are heated and pyrolyzed in a low oxygen atmosphere, and combustible pyrolyzed gas and carbides and ash as pyrolysis residues are reduced in a melting furnace. A pyrolysis gasification and fusion method waste treatment method has been developed, in which the ash content in the waste can be taken out as molten slag by burning it at a high temperature with air volume, and demonstration operation has been performed in part. There is. Further, in the same manner as above, the waste is pyrolyzed in a low oxygen atmosphere to generate a flammable pyrolysis gas and a pyrolysis residue, and the carbide contained in the pyrolysis residue is taken out and recovered, and recovered. A carbonization process in which the carbide is used as a fuel or a thermal energy source in a boiler or the like of various facilities for thermal recycling, and the pyrolysis gas is burned to be used as a heat source for thermally decomposing the waste. In recent years, a waste treatment method based on the method has been developed, and demonstration operation has been started.

In the waste treatment equipment which adopts the waste treatment method by the pyrolysis gasification and melting method or the carbonization treatment method, a rotary kiln type gasification furnace is adopted in order to pyrolyze the waste. The waste is indirectly heated and dried by heat from the outside so that it is thermally decomposed.

This type of kiln gasification furnace is shown in FIG.
As shown in the outline of (b), the inner cylinder 3 is concentrically housed in the outer cylinder 2 so that the heating flow path 4 is formed between the outer cylinder 2 and the inner cylinder 3, and 2 and the inner cylinder 3 constitute a double-cylinder structure in which the kiln main body 1 is configured to rotate integrally, and the kiln main body 1 is inclined downward at the outlet 3b side of the inner cylinder 3, which is one end side in the longitudinal direction. Let's rotate and put it sideways,
A waste input hopper 5 is connected to a inlet 3a of an inner cylinder 3 opened at the other end in the longitudinal direction of the kiln body 1 by a rotary drive device (not shown) and connected through a duster 6. At the same time, a separation chamber 7 for separating the pyrolysis gas 9 and the pyrolysis residue 10 generated by the pyrolysis of the waste 8 is provided at the outlet 3b of the inner cylinder 3 which is open at one longitudinal end of the kiln body 1. While the kiln body 1 is rotated at a low speed by a rotary drive device, the waste 8 thrown into the throw-in hopper 5 is fed into the dust feeder 6
By gradually supplying the waste 8 supplied into the inner cylinder 3 into the inner cylinder 3 of the kiln body 1 along the inner bottom portion of the inner cylinder 3 in the direction of the outlet 3b. And the outlet 3b of the inner cylinder 3 is inserted into the heating flow path 4 formed between the inner and outer cylinders of the kiln body 1 in the meantime.
By circulating hot air 11 from the side toward the inlet 3a, the waste 8 in the inner cylinder 3 is indirectly heated by the hot air 11 via the wall surface of the inner cylinder 3, and dried and pyrolyzed. I am doing it. In addition, the waste 8 in the inner cylinder 3
Pyrolysis gas 9 and pyrolysis residue 10 generated by pyrolysis of
After being separated in the vertical direction in the separation chamber 7, the pyrolysis gas 9 is taken out from the pyrolysis gas outlet 12 at the top of the separation chamber 7, and the pyrolysis residue 10 is taken out from the pyrolysis residue at the bottom of the separation chamber 7. It can be collected from 13 respectively.

By the way, when the amount of waste 8 to be processed in the kiln type gasification furnace is to be increased, the diameter of the inner cylinder 3 of the kiln body 1 is increased.

[0006]

However, as described above, when the diameter of the inner cylinder 3 of the kiln main body 1 is increased in order to increase the amount of waste 8 to be processed, the internal rotation of the kiln main body 1 is increased. The peripheral speed of the cylinder 3 increases, and the waste 8 is moved inside the inner cylinder 3 from the inlet 3a side to the outlet 3b.
Since the moving speed of the kiln increases, in order to secure the residence time required for the thermal decomposition of the waste 8, it is necessary to lengthen the furnace length to cope with it, and thus the kiln main body 1 becomes large and the kiln becomes large. There is a problem that the overall configuration of the gasification furnace becomes large.

Therefore, according to the present invention, even if the diameter of the inner cylinder of the kiln body is increased in order to increase the amount of waste treated, the moving speed of the waste in the inner cylinder from the inlet 3a side to the outlet 3b side is increased. The present invention aims to provide a kiln-type gasification furnace that can suppress the above-mentioned problems and make the furnace length relatively short, and can make the overall structure compact.

[0008]

In order to solve the above problems, the present invention concentrically accommodates an inner cylinder having one end in the longitudinal direction as a waste inlet and the other end as an outlet in the outer cylinder. Then, the kiln body in which the outer cylinder and the inner cylinder can be driven to rotate integrally is placed horizontally by tilting the inner cylinder outlet side downward, and while rotating the kiln body from the inlet into the inner cylinder. While transporting the supplied waste to the outlet, the waste is indirectly heated by the hot air flowing through the heating flow path formed between the outer cylinder and the inner cylinder to be pyrolyzed and gasified. In a certain kiln type gasification furnace, weirs projecting inward in the radial direction are provided on the inner wall surface of the inner cylinder of the kiln body in multiple stages at required intervals in the axial direction of the inner cylinder, and wastes are collected in each weir. It is configured to have a cutout portion for passing the.

When the waste is supplied into the inner cylinder of the kiln body, the waste is moved along the wall surface of the inner bottom portion of the inner cylinder in the outlet side direction as the kiln body rotates, and the waste fluid flows through the heating flow path. It is indirectly heated by the circulating hot air and thermally decomposed. At this time, since weirs are provided in multiple stages on the inner wall surface of the inner cylinder, when the waste conveyed to the outlet side in the inner cylinder reaches the weir, it is retained at the inlet side surface of the weir. After that, it is transferred to the next weir adjacent to the outlet side through the notch. In this weir, it will be retained again on the upstream side surface until it passes through the notch, and this is repeated for each weir provided in multiple stages in the axial direction, so that waste will move from the inlet to the outlet of the inner cylinder. The time required for heating is extended compared to the conventional method, and the amount of heat added to the waste moving from the inlet to the outlet of the inner cylinder is increased. Therefore, the thermal efficiency per unit length in the axial direction of the kiln body is increased. Is increased.

Further, when the waste that has passed through the notch of the weir located on the inlet side of the inner cylinder reaches the weir adjacent to the outlet side of the weir, the waste is stopped by the weir. By doing so, when the waste reaches each weir, it is possible to prevent the waste from immediately passing through the cutout portion of each weir, so that it is necessary for the waste to reach from the inlet to the outlet of the inner cylinder. The time can be further extended, and the thermal efficiency per unit length in the axial direction of the kiln body can be further improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 (a), (b) and (c) and FIG. 2 (a).
(B) and (c) show an embodiment of the kiln type gasification furnace of the present invention. In the same configuration as the kiln type gasification furnace shown in (a) and (b) of FIG. On the inner wall surface of the inner cylinder 3, a weir 14 protruding inward in the radial direction is annularly attached so as to be perpendicular to the axial direction of the inner cylinder 3 which is the moving direction of the waste 8 in the inner cylinder 3. A plurality of the weirs 14 are provided at required intervals in the axial direction, and when the wastes 8 are conveyed from the inlet 3a side to the outlet 3b side in the inner cylinder 3, the wastes 8 are generated at the respective weirs 14 above. Once blocked, the waste 8 in the inner cylinder 3 is prevented from moving to the outlet 3b side and the retention time can be secured.

Each of the weirs 14 extends in the circumferential direction along the inner circumferential surface of the inner cylinder 3 as a required height, and the notch 1 is formed in a part of the circumferential direction.
5 is provided, and when viewed from the axial direction of the inner cylinder 3, for example, the angular range of 3π / 2 [rad] in the circumferential direction is a substantially horseshoe shape that serves as a weir, and the remaining circumferential direction π /
The waste 8 is allowed to pass through as a notch 15 in the angular range of 2 [rad], and the weir 14 that rotates with the rotational drive of the kiln body 1 is located in the lower part of the inner space of the inner cylinder 3. While the kiln body 1 is 3/4
While rotating, the weir 14 is applied to the waste 8 transferred from the inlet 3a side to the outlet 3b side along the inner bottom portion of the inner cylinder 3.
Acts as a baffle to hold the waste 8 and suppress movement of the waste 8 toward the outlet 3b.

On the other hand, when the cutout portion 15 of the weir 14 formed over the angular range of π / 2 [rad] in the circumferential direction is located in the lower part of the inner space of the inner cylinder 3, the waste 8 is the waste material 8.
The waste 8 can be prevented from being clogged in the portion of the weir 14 by passing through the notch 15 of No. 4 and moving to the outlet 3b side.

Further, after passing through the cutout portion 15 of a certain weir 14, the inner cylinder 3 is provided with an outlet 3 as the kiln body 1 is driven to rotate.
When the waste 8 transferred to the b side reaches the weir 14 adjacent to the outlet 3b side of the weir 14, the weir 1 on the outlet side is provided.
4 so that the cutout portion 15 provided in 4 cannot be directly passed, and the waste 8 can be sequentially retained for a long time at each weir 14 so that the moving speed of the waste 8 to the outlet side can be suppressed. In order to do so, the spacing (pitch) between the weirs 14 arranged in the axial direction of the inner cylinder 3, the phase arrangement of the cutouts 15 of the weirs 14 arranged in the axial direction, the rotation speed of the kiln body 1, as well as,
Each condition of the moving speed of the waste 8 in the inner cylinder 3 in the outlet direction, which is generated as the kiln body 1 rotates, is set.

Here, an example of the above-mentioned condition setting is shown in FIG.
This will be described using the model diagrams shown in (b) and (c). In addition,
2 (a), (b), and (c), the waste 8 moves toward the outlet as one lump in the inner cylinder 3 along with the rotation of the kiln body 1 in order to simplify the behavior. It is shown as doing.

As shown in FIGS. 2A, 2B, and 2C, weirs 14a and 14b having notches 15 formed in the angular range of the circumferential direction π / 2 [rad] are provided in the inner cylinder 3. When arranged in the axial direction on the inlet 3a side and the outlet 3b side (upstream side and downstream side in the waste transfer direction), with respect to the position of the cutout portion 15 of the weir 14a located on the inlet 3a side, The position of the notch 15 of the weir 14b adjacent to the outlet 3b side is π / 2 on the downstream side in the rotation direction of the kiln body 1 as indicated by the arrow in the figure.
[Rad] When the phase is set to shift, weir 1
In 4a, as shown in FIGS.
When 5 is located at the lowermost part of the inner space of the inner cylinder 3, the waste material 8 passes through the cutout portion 15 of the weir 14a.
After that, the waste 8 that has passed through the notch 15 of the weir 14a
Is transferred to the outlet 3b side as the kiln body 1 is driven to rotate, and as shown by the two-dot chain line in FIGS. 2A and 2C, the cutout portion of the weir 14b adjacent to the outlet 3b side of the weir 14a. 15
2, the position of the notch 15 of the weir 14b is arranged as shown in FIG.
As shown in (c), π / 2 from the lower end to the downstream side in the rotation direction.
[Rad] If the arrangement is deviated, the notch 15 of the weir 14b, which rotates the kiln body 1 by 3/4 and rotates integrally with the rotation of the kiln body 1, is located at a lower position of the inner space of the inner cylinder 3. Waste 8 until it reaches the weir 14b.
Will be able to fasten.

Therefore, the pitch of the weirs 14a and 14b is L [m], the rotation speed of the kiln body 1 is N [rpm],
The moving speed of the waste 8 toward the outlet 3b side due to the rotation of the kiln body 1 is V [m / min] (moving speed V is the diameter of the inner cylinder 3, the rotation speed of the kiln body 1, and the waste It is derived from the angle of repose of the waste 8)), and the time required for the waste 8 passing through the weir 14a to reach the weir 14b is L /
V [min], and the number of rotations of the kiln body 1 during that time is NL / V [rotation].
The rotation angle of the kiln body 1 required to move it to the position 4b is (NL / V) · 2π.

By the way, the arrangement of the cutout portion 15 of the weir 14b shown in FIG. 2C is the same as that when the waste 8 passes through the cutout portion 15 of the weir 14a. The cutout portion 15 of the weir 14b when the waste 8 reaches the weir 14b has only to be in the same phase as the initial state in which the cutout portion 15 of the weir 14a is located at the lower end. The number of rotations (rotation angle) of the main body 1 is 2
nπ (n is an integer). Therefore, (NL / V) .multidot.2.pi. = 2n.pi. (N is an integer) (1) holds, and the conditional expression of NL / V = n (n is an integer) is derived from the above formula (1).

Therefore, the pitch L between the weirs 14 actually arranged in the axial direction so as to satisfy this conditional expression.
[M], the rotation speed N [rpm] of the kiln body 1, and the moving speed V [m / min] of the waste 8 in the direction of the outlet 3b accompanying the rotation of the kiln body 1 may be set.

When the waste 8 is pyrolyzed using the above kiln gasification furnace, the kiln body 1 is rotated at a low speed by the rotary drive device as in the conventional case.
The waste material 8 in the input hopper 5 is gradually supplied from the inlet 3a into the inner cylinder 3 of the kiln body 1 using the duster 6. The waste 8 is transferred in the direction of the outlet 3b along the inner bottom of the inner cylinder 3 by the rotation of the kiln body 1 which is rotated while being inclined toward the outlet 3b. When the waste 8 conveyed in the direction of the outlet 3b reaches the weir 14 disposed on the most inlet side among the weirs 14 provided in multiple stages on the inner wall surface of the inner cylinder 3 at required intervals in the axial direction. The weir 14 prevents the waste 8 from moving toward the outlet 3b. The obstruction of the movement of the waste 8 by the weir 14 is continued until the notch 15 of the weir 14 rotates to the lower position of the inner space of the inner cylinder 3 as the kiln body 1 rotates. After that, when the cutout portion 15 of the weir 14 comes to be located in the lower portion of the inner space of the inner cylinder 3, the waste material 8 can pass through the cutout portion 15, so that the waste material is discarded as the kiln body 1 rotates. The transfer of the object 8 toward the outlet 3b is restarted. Next, when the waste 8 that has passed through the notch 15 of the weir 14 is transferred in the direction of the outlet 3b and reaches the second weir 14 from the inlet 3a side,
The weir 14 again inhibits the transfer of the waste 8 toward the outlet 3b, and the waste 8 is retained at the side surface of the inlet 3a of the weir 14. At this time, since the conditions are set as described above, the obstruction of the transfer of the waste 8 toward the outlet 3b continues while the kiln main body 1 rotates 3/4 rotation in the second weir 14 from the inlet 3a side. After that, the transfer of the waste 8 in the direction of the outlet 3b through the notch 15 of the weir 14 is restarted. Then, the second weir 1 from the entrance 3a side
Similar to 4, each weir 14 installed in multiple stages in the axial direction
, The transfer of the waste 8 toward the outlet 3b is obstructed during the period in which the kiln body 1 rotates 3/4 rotation. Therefore, the time required for the waste 8 to pass through the inner cylinder 3 from the inlet 3a side to the outlet 3b side is extended as compared with the case of the conventional kiln type gasification furnace. Since the indirect heating by the hot air 11 flowing through the heating flow path 4 is continuously performed, the amount of heat added to the waste 8 moving from the inlet 3a to the outlet 3b of the inner cylinder 3 is increased. Therefore, the thermal efficiency per unit length in the axial direction of the kiln body 1 is improved.

In this way, the weir 1 provided on the inner wall surface of the inner cylinder 3
4, the movement of the waste 8 from the inlet 3a side to the outlet 3b side can be suppressed and the thermal efficiency per unit length in the axial direction of the kiln body 1 can be improved, so that the throughput of the waste 8 can be increased. Therefore, even if the diameter of the inner cylinder 3 of the kiln main body 1 is increased to increase the peripheral speed of the inner cylinder 3, the moving speed of the waste 8 in the inner cylinder 3 from the inlet 3a side to the outlet 3b side. Can be dealt with without increasing too much, so that even when securing the residence time required for the thermal decomposition of the waste 8, the kiln gasification can be performed because the increase in the furnace length can be suppressed and relatively shortened. The overall structure of the furnace can be made compact.

The present invention is not limited to the above embodiment, and the axial and radial sizes of the inner cylinder 3 of the kiln body 1 depend on the desired amount of waste 8 to be treated. The number of steps of the weirs 14 arranged in the axial direction on the inner wall surface of the inner cylinder 3 may be freely changed, and the number of stages of the weirs 14 arranged in the axial direction of the inner cylinder 3 and the waste 8 having a desired treatment amount 2A, 2B, 2C, and 2C, the cutout portion of the weir 14a on the inlet 3a side of the inner cylinder 3 can be set as long as the retention time required for the thermal decomposition of The phase of the notch 15 of the weir 14b adjacent to the outlet 3b side with respect to 15 is determined by the kiln body 1
The pitch L [m] between the weirs 14 arranged in the axial direction and the rotation speed N [ rpm] and the moving speed V [m / min] of the waste 8 in the direction of the outlet 3b accompanying the rotation of the kiln body 1 are derived, and the above parameters L and N are satisfied so as to satisfy the conditional expression. , V is set, the phase shift between the cutouts 15 of the weirs 14a and 14b adjacent to each other in the axial direction may be set arbitrarily, and in this case, the cutout 1 of the weir 14a is formed.
The kiln body 1 so that 5 is arranged as shown in FIG.
2C, the cutout portion 15 of the weir 14a and the cutout portion 15 of the weir 14b, which are shifted in required angular phase from each other, are arranged in the kiln body 1 required to be arranged as shown in FIG. 2C. It suffices to substitute the rotational speed (rotation angle) into the right side of the expression (1) to derive the conditional expressions for the parameters L, N, V, and further set the parameters L, N, V in advance. As a result, the right side of the equation (1) is set as an unknown number and the equation (1) is solved.
When the waste 8 that has passed through reaches the weir 14 that is adjacent to the outlet 3b side, each of the necessities necessary to enable the kiln body 1 to be retained while the kiln body 1 rotates 3/4 rotation at the weir 14. It goes without saying that the phase shift of the notch 15 of the weir 14 may be calculated, and furthermore, the waste 8 that has passed through the notch 15 of the weir 14 is adjacent to the outlet 3b.
If the waste 8 can be retained for the required time without passing through at least the cutout portion 15 of the weir 14 when reaching the above condition, the parameters L, N, V
The phase shift of the notch 15 of the adjacent weir 14 may be set freely. In the above embodiment, each weir 1
The notch 15 of 4 in the angular range of the circumferential direction π / 2 [rad],
That is, although it is shown as extending over 1/4 of the circumferential direction,
The angular range of the notch 15 may be set arbitrarily, and in this case, for example, the weir 14 formed by forming the notch 15 over the angular range of 1 / i in the circumferential direction is adopted and the kiln gas of the present invention is adopted. When a chemical reactor is configured, it is shown in Fig. 3 (a) (b) (c)
As shown in FIG. 14, the weirs 14a ′ and 14b ′ provided with the cutouts 15 in the angular range of 2π / i [rad] in the circumferential direction are provided with 14a.
When the cutout portion 15 of the weir of ′ is located at the lower end portion of the inner cylinder 3,
As is clear from the model diagram when the cutout portion of the weir 14b 'adjacent to the outlet 3b side is arranged so that the phase shifts by 2π / i [rad] on the downstream side in the rotational direction, it passes through the cutout portion 15 of the weir 14a'. The pitch L [m] between the weirs 14 required to make the generated waste reach the position near the upstream side in the rotation direction of the notch 15 of the weir 14b ′, the rotation speed N [rpm] of the kiln body 1, and the kiln. Each set value of the moving speed V [m / min] of the waste 8 toward the outlet 3b side due to the rotation of the main body 1 may be derived by a conditional expression similar to the above expression (1), and the like. Needless to say, various changes can be made without departing from the scope of the present invention.

[0024]

As described above, according to the kiln gasification furnace of the present invention, the inner cylinder having one end in the longitudinal direction as the waste inlet and the other end as the outlet is concentric in the outer cylinder. A kiln body that is housed so that the outer cylinder and the inner cylinder can be driven to rotate integrally is placed horizontally with the inner cylinder outlet side tilted downward, and the kiln body is rotated and the inlet is introduced into the inner cylinder. While transporting the waste supplied from the outlet to the outlet, the waste is indirectly heated by the hot air flowing through the heating channel formed between the outer cylinder and the inner cylinder to be pyrolyzed and gasified. In the present kiln-type gasification furnace, weirs projecting radially inward are provided on the inner wall surface of the inner cylinder of the kiln body in multiple stages at required intervals in the axial direction of the inner cylinder, and are discarded in the respective weirs. Since it has a notch that allows objects to pass through, the inner wall surface of the inner cylinder is axially oriented. The weirs provided in multiple stages can suppress the moving speed of the waste from the inlet side to the outlet side and improve the thermal efficiency per unit length in the axial direction of the kiln body. Even if the diameter of the inner cylinder of the kiln body is increased in order to increase the value, it becomes possible to cope with the increase in the moving speed of the waste from the inlet side to the outlet side in the inner cylinder, and therefore the above Even when securing the residence time required for the thermal decomposition of waste with increased throughput, it is possible to suppress the increase in furnace length and make it relatively short, so that the overall configuration can be made compact, etc. Exert the effect.

When the waste that has passed through the notch of the weir located on the inlet side of the inner cylinder reaches the weir adjacent to the outlet side of the weir, the waste is stopped by the weir. As a result, when the waste reaches each weir, it is possible to prevent the waste from immediately passing through the notch portion of each weir, so that the time required for the waste to reach from the inlet of the inner cylinder to the outlet can be reduced. The effect can be further extended, and the thermal efficiency per unit length in the axial direction of the kiln body can be further improved.

[Brief description of drawings]

1 shows an embodiment of a kiln-type gasification furnace of the present invention, (a) is a schematic sectional side view, (b) is a view taken along the line AA of (a), (c). [Fig. 6] is a view taken along the line B-B in (a).

FIG. 2 is a model diagram used to calculate the set conditions in the kiln gasification furnace of FIG. 1, in which (a) is a schematic diagram showing a cut side surface of the inner cylinder, and (b) is a C direction in (a). An arrow view, (c) shows a D direction arrow view in (a).

FIG. 3 is a model diagram used to calculate setting conditions when a weir having cutouts with different angular ranges is adopted in the kiln gasification furnace of FIG. 1, and (a) shows cutting of the inner cylinder. FIG. 6 is a schematic view showing a side surface, (b) is a view in the direction E in (a), and (c) is a view in the direction F in (a).

4A and 4B are schematic views showing an example of a conventional kiln gasification furnace, in which FIG. 4A is a sectional side view, and FIG. 4B is a view taken in the direction of arrows G-G in FIG.

[Explanation of symbols] 1 kiln body 2 outer cylinder 3 inner cylinder 4 heating channels 8 waste 11 hot air 14, 14a, 14a ', 14b, 14b' Weir 15 Notch

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) // C10J 3/00 C10J 3/00 A (72) Inventor Atsushi Kamei 3-2 Toyosu, Koto-ku, Tokyo No. 16 Ishikawajima Harima Heavy Industries Ltd. Tokyo Engineering Center F term (reference) 3K061 AA07 AB02 AC01 CA07 FA02 KA02 KA05 KA13 KA21 KA23 KA27 4D004 AA46 BA03 CA24 CB09 CB36 CB43 CB50 4K061 AA08 BA12 CA29

Claims (2)

[Claims] 1. An inner cylinder having one end in the longitudinal direction as a waste inlet and the other end as an outlet is concentrically accommodated in the outer cylinder so that the outer cylinder and the inner cylinder can be integrally driven to rotate. The inner side of the inner side of the inner side of the kiln body is tilted downward and the kiln body is placed horizontally, and while the kiln body is rotated to convey the waste supplied from the inlet into the inner side of the kiln body to the outlet side, In a kiln-type gasifier in which the waste is indirectly heated and pyrolyzed into gas by hot air flowing through a heating flow path formed between the inner cylinder and the inner cylinder, It is characterized in that a weir projecting inward in the radial direction is provided on the wall surface in multiple stages in the axial direction of the inner cylinder at required intervals, and a notch for allowing waste to pass through each weir. Kiln type gasifier. 2. The waste is blocked by the weir when the waste that has passed through the notch of the weir located on the inlet side of the inner cylinder reaches the weir adjacent to the outlet side of the weir. 1
Kiln type gasifier described.