Incineration system

Abstract

To provide an incineration system that suppresses accumulation of incineration ash in a flue.SOLUTION: An incineration system includes: an incinerator for incinerating an object to be treated; and a flue for supplying exhaust gas discharged from the incinerator to a rear stage facility. The flue includes first piping extending horizontally. The first piping includes a discharge section for discharging incineration ash included in exhaust gas to outside of the first piping.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to incineration systems. [Background technology]

[0002] For example, various techniques have been proposed for treating exhaust gas from incinerators that incinerate sewage sludge (hereinafter also referred to as simply sludge or material to be treated) (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-108216 A Summary of the Invention [Problem to be solved by the invention]

[0004] The exhaust gas discharged from the incinerator includes, for example, incineration ash (hereinafter, also simply referred to as incineration ash) generated by incineration of the material to be treated. Therefore, in an incineration system having the incinerator (hereinafter, also simply referred to as incineration system), for example, it is desired to suppress the accumulation of incineration ash in the flue through which the exhaust gas from the incinerator passes. [Means for solving the problem]

[0005] The incineration system of the present invention comprises an incinerator for incinerating the material to be treated, and a flue for supplying exhaust gas discharged from the incinerator to downstream equipment, the flue having a first pipe extending horizontally, and the first pipe having a discharge section for discharging incineration ash contained in the exhaust gas to the outside of the first pipe. Effect of the Invention

[0006] According to the incineration system of the present invention, it is possible to suppress the accumulation of incineration ash in the flue. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of an incineration system 100 in the first embodiment. [Diagram 2] FIG. 2 is a diagram illustrating an example of the configuration of the pipe L1 in the first embodiment. [Diagram 3] FIG. 3 is a diagram illustrating an example of the configuration of the pipe L1 in the first embodiment. [Figure 4] FIG. 4 is a diagram illustrating an example of the configuration of the pipe L1 in the second embodiment. [Diagram 5] FIG. 5 is a diagram illustrating a configuration example of the pipe L1 in the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. However, such descriptions should not be interpreted in a limiting sense and do not limit the subject matter described in the claims. In addition, various changes, substitutions, and modifications can be made without departing from the spirit and scope of the present disclosure. In addition, different embodiments can be appropriately combined.

[0009] [Incineration system 100 in the first embodiment] First, the incineration system 100 in the first embodiment will be described. Fig. 1 is a diagram for explaining a configuration example of the incineration system 100 in the first embodiment. Note that the arrangement positions, lengths, and numbers of pipes shown below are examples and are not limited to these.

[0010] 1, the incineration system 100 includes, for example, an incinerator 1 for incinerating sludge, a heat exchanger 2 which is downstream equipment of the incinerator 1, and a blower B1 which supplies air (hereinafter also referred to as combustion air) to the incinerator 1. The blower B1 is, for example, a device such as a fan or a blower that has a function of blowing air.

[0011] The incinerator 1 is, for example, a fluidized incinerator that incinerates sludge (dehydrated cake) supplied via a pipe L11, and has a so-called fluidized bed 1a. The pipe L11 is, for example, a pipe that connects a preceding stage facility of the incinerator 1 (for example, a sludge dryer not shown) to the incinerator 1. Below, a case where the incinerator 1 is a fluidized incinerator will be described, but the incinerator 1 may be various types of incinerators other than a fluidized incinerator.

[0012] The blower B1 supplies combustion air to the heat exchanger 2 via, for example, a pipe L21. The pipe L21 is, for example, a pipe that connects an outlet side of the blower B1 and an inlet side of the heat exchanger 2 for combustion air.

[0013] The heat exchanger 2 recovers, for example, the heat contained in the exhaust gas G1 discharged from the incinerator 1 via the pipe L1 (i.e., the waste heat of the incinerator 1). The pipe L1 is, for example, a pipe that connects the outlet side of the exhaust gas G1 in the incinerator 1 with the inlet side of the exhaust gas G1 in the heat exchanger 2. Hereinafter, the pipe L1 is also referred to as the flue L1.

[0014] Specifically, the heat exchanger 2 raises the temperature of the combustion air supplied by the blower B1, for example, by performing heat exchange between the exhaust gas G1 discharged from the incinerator 1 via the piping L1 and the combustion air supplied by the blower B1.

[0015] The heat exchanger 2 supplies the exhaust gas G1 to downstream equipment (not shown) of the heat exchanger 2, for example, via a pipe L2. The pipe L2 is, for example, a pipe that connects an outlet side of the exhaust gas G1 in the heat exchanger 2 to downstream equipment of the heat exchanger 2.

[0016] The incineration system 100 may further include, as downstream equipment of the heat exchanger 2, a dust collector (not shown) for removing impurities from the exhaust gas G1 supplied from the heat exchanger 2, and a filter (not shown) for removing SO X The smoke washing treatment tower (not shown) may include a smoke washing treatment tower that removes such components by incorporating them into smoke washing water, and a chimney (not shown) that releases the exhaust gas G1 cleaned in the smoke washing treatment tower to the outside.

[0017] [Pipe L1 in the first embodiment] Next, the pipe L1 in the first embodiment will be described. Figures 2 and 3 are diagrams for explaining a configuration example of the pipe L1 in the first embodiment. Specifically, Figure 2 is a front cross-sectional view of the pipe L1 and the pipe L2 in the first embodiment. Also, Figure 3 is a cross-sectional view in the X-axis direction of the pipe L1b in the first embodiment.

[0018] The pipe L1 is composed of, for example, a pipe L1a (hereinafter also referred to as a second pipe L1a), a pipe L1b (hereinafter also referred to as a first pipe L1b), and a pipe L1c.

[0019] Pipe L1a is, for example, a pipe extending in the Z-axis direction (vertical direction) and its lower end (end on the Z2 direction side) is connected to the outlet side of the exhaust gas G1 in the incinerator 1, and its upper end (end on the Z1 direction side) is connected to the Z2 direction side (vertically downward side) of one end (end on the X2 direction side) of pipe L1b.

[0020] Specifically, the pipe L1a communicates with, for example, an exhaust port 1c provided in the ceiling portion 1b of the incinerator 1. As shown by the solid arrow in FIG. 2, the pipe L1a supplies (guides) the exhaust gas G1 discharged from the incinerator 1 to the pipe L1b.

[0021] Pipe L1b is, for example, a pipe extending in the X-axis direction (horizontal direction) and is connected to the upper end (end on the Z1 direction side) of pipe L1a at the Z2 direction side (vertical downward side) of one end (end on the X2 direction side) and is connected to the upper end (end on the Z1 direction side) of pipe L1c at the Z2 direction side (vertical downward side) of the other end (end on the X1 direction side).

[0022] Specifically, as indicated by a solid arrow in FIG. 2, the pipe L1b supplies (guides) the exhaust gas G1 supplied from the pipe L1a to the pipe L1c, for example.

[0023] More specifically, the pipe L1b has, for example, a bottom portion L1b1 which is a flat plate constituting the wall surface (bottom surface) on the Z2 direction side, and a ceiling portion L1b2 which is a flat plate constituting the wall surface (upper surface) on the Z1 direction side. The pipe L1b also has, for example, side wall portions L1b3 made of four flat plates constituting the wall surfaces (side surfaces) on the X1 direction side, the X2 direction side, the Y1 direction side, and the Y2 direction side.

[0024] In the following, the case where the bottom portion L1b1 and the ceiling portion L1b2 are each rectangular (i.e., the shape of the pipe L1b is a hollow rectangular parallelepiped) will be described, but is not limited thereto. Specifically, the shape of each of the bottom portion L1b1 and the ceiling portion L1b2 may be, for example, a circle that is elongated in the X-axis direction.

[0025] 3, the ceiling portion L1b2 may be, for example, a separate member from the bottom portion L1b1 and the side wall portion L1b3. That is, the ceiling portion L1b2 may be, for example, a member that is detachable from the side wall portion L1b3.

[0026] Specifically, the side wall portion L1b3 may have a flange portion L1b4 extending in the X-axis direction at an upper end (end in the Z1 direction) of an outer side surface (surface on the Y2 direction side) of the wall surface on the Y2 direction side, as shown in Fig. 3. Also, the side wall portion L1b3 may have a flange portion L1b4 extending in the X-axis direction at an upper end (end in the Z1 direction) of an outer side surface (surface on the Y1 direction side) of the wall surface on the Y1 direction side, as shown in Fig. 3. The ceiling portion L1b2 may be connected to the side wall portion L1b3 to form the piping L1b, for example, by fixing the lower surface (the surface on the Z2 direction side) of the end portion on the Y2 direction side to a connecting member L1b5 (e.g., a bolt) in a state where the lower surface (the surface on the Z2 direction side) of the end portion on the Y1 direction side is adhered to the upper surface (the surface on the Z1 direction side) of the flange portion L1b4 on the Y1 direction side and by fixing the lower surface (the surface on the Z2 direction side) of the end portion on the Y1 direction side to a connecting member L1b5 in a state where the upper surface (the surface on the Z1 direction side) of the flange portion L1b4 on the Y1 direction side.

[0027] The bottom L1b1 is provided with, for example, an outlet L1d that communicates the inside of the pipe L1 with the outside of the pipe L1. That is, the outlet L1d is, for example, a hole that can discharge the incineration ash contained in the exhaust gas G1 moving in the pipe L1 to the outside of the pipe L1, as shown by the dashed arrow in FIG. 2. The outlet L1d may be provided, for example, at a position near the center of the bottom L1b1 in the X-axis direction. The outlet L1d may be, for example, a circular hole.

[0028] Also, for example, a tapered member L1e having a tapered shape is attached to the outside (Z2 direction side) of the bottom L1b1. Specifically, the tapered member L1e is attached, for example, to the outside of the bottom L1b1 so as to cover the discharge port L1d. And, for example, a discharge pipe L1f is attached to the tip end (end portion on the Z2 direction side) of the tapered member L1e. That is, the tapered member L1e and the discharge pipe L1f are members that, for example, collect the incineration ash discharged from the discharge port L1d and transfer it to a predetermined facility (for example, an ash hopper, etc.). In the following, the discharge port L1d, the tapered member L1e, and the discharge pipe L1f are also collectively referred to simply as the discharge section 3.

[0029] Pipe L1c is, for example, a pipe extending in the Z-axis direction (vertical direction) and communicating at its upper end (end on the Z1 direction side) with the Z2 direction side (vertically downward side) of the other end (end on the X1 direction side) of pipe L1b, and communicating at its lower end (end on the Z2 direction side) with the inlet side of heat exchanger 2 (inlet side of exhaust gas G1).

[0030] Specifically, the pipe L1c supplies (guides) the exhaust gas G1 supplied from the pipe L1b to the heat exchanger 2, as indicated by a solid arrow in FIG.

[0031] Thus, the incineration system 100 in this embodiment includes, for example, an incinerator 1 that incinerates sludge, and a pipe L1 that supplies exhaust gas G2 discharged from the incinerator 1 to downstream equipment of the incinerator 1 (for example, a heat exchanger 2). The pipe L1 includes, for example, a pipe L1b that extends horizontally. Furthermore, the pipe L1b includes, for example, a discharge section 3 that discharges incineration ash contained in the exhaust gas G1 to the outside of the pipe L1b.

[0032] Specifically, in the bottom part L1b1 of the pipe L1b, for example, as at least a part of the discharge part 3, a discharge port L1d for discharging the incineration ash contained in the exhaust gas G1 is provided.

[0033] That is, as shown in Fig. 2, for example, when the pipe L1 has a pipe L1b extending in the horizontal direction, the incineration ash (for example, the incineration ash melted in the local high temperature field in the incinerator 1) contained in the exhaust gas G1 flowing through the first pipe L1 may accumulate at the bottom L1b1. And, such incineration ash may, for example, adhere to the first pipe L1b, thereby causing blockage of the first pipe L1b.

[0034] Therefore, in the incineration system 100 in this embodiment, for example, incineration ash contained in the exhaust gas G1 flowing through the pipe L1b (incineration ash accumulated on the bottom L1b1) is discharged from the discharge port L1d to the outside of the pipe L1b.

[0035] As a result, the incineration system 100 in this embodiment can, for example, suppress the accumulation of incineration ash in the pipe L1b, and further suppress the occurrence of blockages in the pipe L1b.

[0036] In addition, a spraying device (not shown) such as an air blaster that sprays gas (for example, air) onto the incineration ash adhering to the inner wall of the pipe L1b may be attached to the inner wall of the pipe L1b.

[0037] Specifically, the spray device may be attached to, for example, at least one of the bottom portion L1b1, the ceiling portion L1b2, and the side wall portion L1b3, and may detach the incineration ash adhering to at least one of the bottom portion L1b1, the ceiling portion L1b2, and the side wall portion L1b3 by spraying gas thereon.

[0038] As a result, the incineration system 100 in this embodiment can, for example, drop the incineration ash adhering to the ceiling part L1b2 or the side wall part L1b3 to the bottom part L1b1, and discharge the incineration ash from the discharge port L1d. In addition, the incineration system 100 can also discharge the incineration ash adhering to a position away from the discharge port L1d on the bottom part L1b1 from the discharge port L1d.

[0039] Moreover, the above-mentioned spray device may be provided, for example, on the inner wall of the tapered member L1e.

[0040] As a result, the incineration system 100 in this embodiment is able to discharge incineration ash into the discharge pipe L1f, even if the incineration ash discharged from the discharge outlet L1d adheres to the inner wall of the tapered member L1e.

[0041] The bottom portion L1b1 may have a protrusion facing the Z2 direction, for example. The outlet L1d may be provided at the tip of the protrusion. Specifically, the shape of the bottom portion L1b1 may be a semi-cylindrical shape protruding in the Z2 direction, for example.

[0042] As a result, the incineration system 100 in this embodiment can, for example, suppress the accumulation of incineration ash on the bottom L1b1 and efficiently move the incineration ash that has fallen to the bottom L1b1 to the discharge port L1d. Therefore, the incineration system 100 can, for example, more efficiently discharge the incineration ash from the discharge port L1d to the tapered member L1e (discharge pipe L1f).

[0043] In the above example, the pipe L1 is composed of the pipes L1a, L1b, and L1c, and the pipe L1b is connected to the incinerator 1 (exhaust port 1c) via the pipe L1a. However, the present invention is not limited to this. Specifically, in the incineration system 100, the pipe L1 may be composed of the pipes L1b and L1c, and the Z2 direction side (vertically downward side) of one end (end on the X2 direction side) of the pipe L1b may be directly connected to the incinerator 1 (exhaust port 1c).

[0044] [Incineration system 200 according to the second embodiment] Next, the incineration system 200 in the second embodiment will be described. FIG. 4 is a diagram for explaining a configuration example of the pipe L1 in the second embodiment. Specifically, FIG. 4 is a front cross-sectional view of the pipe L1 and the pipe L2 in the second embodiment. Note that the configuration example of the incineration system 200 in the second embodiment is the same as the configuration example of the incineration system 100 in the first embodiment (the configuration example of the incineration system 100 explained in FIG. 1), so the explanation will be omitted. Also, below, the points that differ from the incineration system 100 in the first embodiment will be explained.

[0045] The pipe L1b in the second embodiment is, for example, a pipe whose cross-sectional shape in the Y-axis direction is an inverted U. That is, the shape of the pipe L1b is, for example, a shape in which each of two tip portions faces in the Z2 direction.

[0046] Specifically, as shown in FIG. 4, for example, pipe L1b communicates with the upper end (end on the Z1 direction side) of pipe L1a at one end (end on the X2 direction side) of its inverted U-shape, and communicates with the upper end (end on the Z1 direction side) of pipe L1c at the other end (end on the X1 direction side) of its inverted U-shape.

[0047] More specifically, as shown in Fig. 4, the bottom L1b1 of the pipe L1b has, for example, a part on the X2 direction side and a part on the X1 direction side each inclined toward the Z2 direction. In other words, the bottom L1b1 is composed of, for example, a horizontal part FL extending in the X-axis direction (horizontal direction) between a position P1 (hereinafter also referred to as a first position P1) and a position P2 (hereinafter also referred to as a second position P2) on the bottom L1b1, an inclined part SL1 inclined toward the Z2 direction side from the position P1 toward the end on the X2 direction side, and an inclined part SL2 inclined toward the Z2 direction side from the position P2 toward the end on the X1 direction side. Note that, hereinafter, the inclined part SL1 and the inclined part SL2 are collectively referred to simply as the discharge part 3.

[0048] That is, as shown by the dashed arrow in Fig. 4, the inclined portion SL1 drops the incineration ash accumulated on the inclined portion SL1 along the inclined surface of the inclined portion SL1 to the pipe L1a side. Also, as shown by the dashed arrow in Fig. 4, the inclined portion SL2 drops the incineration ash accumulated on the inclined portion SL2 along the inclined surface of the inclined portion SL2 to the pipe L1c side.

[0049] Thus, in the incineration system 200 of this embodiment, the pipe L1 has a pipe L1a that extends vertically and communicates with one end (end on the X2 direction side) of the pipe L1b at its upper end (end on the Z1 direction side). The pipe L1 also has a pipe L1c that extends vertically and communicates with the other end (end on the X1 direction side) of the pipe L1b at its upper end (end on the Z1 direction side). The bottom L1b1 of the pipe L1b has, for example, an inclined portion SL1 that inclines downward (Z2 direction side) from the position P1 toward the one end (end on the X2 direction side) of the pipe L1b as at least a part of the discharge section 3. The bottom L1b1 of the pipe L1b has, for example, an inclined portion SL2 that inclines downward (Z2 direction side) from the position P2 toward the other end (end on the X1 direction side) of the pipe L1b as at least a part of the discharge section 3.

[0050] That is, in the incineration system 200 of this embodiment, for example, incineration ash contained in the exhaust gas G1 flowing through the pipe L1b (incineration ash accumulated on the inclined portion SL1 or the inclined portion SL2) is dropped onto the pipe L1a side or the pipe L1c side.

[0051] As a result, the incineration system 200 in this embodiment can, for example, suppress the accumulation of incineration ash in the pipe L1b, and further suppress the occurrence of blockages in the pipe L1b.

[0052] In addition, in this embodiment, for example, a spray device that sprays gas onto the incineration ash adhering to the inner wall of the pipe L1b may be attached to the inner wall of the pipe L1b.

[0053] Specifically, the spray device may be attached to, for example, at least one of the bottom portion L1b1, the ceiling portion L1b2, and the side wall portion L1b3, and may detach the incineration ash adhering to at least one of the bottom portion L1b1, the ceiling portion L1b2, and the side wall portion L1b3 by spraying gas thereon.

[0054] As a result, the incineration system 200 in this embodiment can drop, for example, the incineration ash adhering to the ceiling part L1b2 or the side wall part L1b3 to the bottom part L1b1, and can also drop this incineration ash to the pipe L1a side or the pipe L1c side. In addition, the incineration system 200 can also drop, for example, the incineration ash adhering to the horizontal part FL to the pipe L1a side or the pipe L1c side.

[0055] Also, the bottom portion L1b1 in this embodiment may not have the horizontal portion FL, and may be composed of the inclined portion SL1 and the inclined portion SL2. That is, the position P1 may be the same position as the position P2.

[0056] As a result, the incineration system 200 in this embodiment can, for example, further promote the falling of the incineration ash accumulated on the bottom L1b1 to the pipe L1a side or the pipe L1c side.

[0057] In addition, the bottom L1b1 in this embodiment may have, for example, the discharge port L1d, the tapered member L1e, and the discharge pipe L1f described in Fig. 2. That is, the incineration system 200 in this embodiment may not only discharge the incineration ash accumulated on the bottom L1b1 to the pipe L1a side or the pipe L1c side by dropping it to the outside of the pipe L1b, but also discharge the incineration ash accumulated on the bottom L1b1 from the discharge port L1d to the outside of the pipe L1b.

[0058] This makes it possible for the incineration system 200 in this embodiment to more efficiently discharge, for example, the incineration ash accumulated on the bottom L1b1.

[0059] In the above example, the pipe L1 is composed of the pipes L1a, L1b, and L1c, and the pipe L1b is connected to the incinerator 1 (exhaust port 1c) via the pipe L1a. However, the present invention is not limited to this. Specifically, in the incineration system 200, the pipe L1 may be composed of the pipes L1b and L1c, and one end of the inverted U-shape of the pipe L1b (the end on the X2 direction side) may be directly connected to the incinerator 1 (exhaust port 1c).

[0060] [Incineration system 300 according to the third embodiment] Next, an incineration system 300 in the third embodiment will be described. FIG. 5 is a diagram for explaining a configuration example of the pipe L1 in the third embodiment. Specifically, FIG. 5 is a front cross-sectional view of the pipe L1 and the pipe L2 in the third embodiment. Note that the configuration example of the incineration system 300 in the third embodiment is the same as the configuration example of the incineration system 100 in the first embodiment (the configuration example of the incineration system 100 explained in FIG. 1), so the explanation will be omitted. Also, below, the points that differ from the incineration system 100 in the first embodiment and the incineration system 200 in the second embodiment will be explained.

[0061] In the third embodiment, the pipe L1b is provided with a heat transfer tube 4 in at least one of the bottom portion L1b1, the ceiling portion L1b2, and the side wall portion L1b3. The heat transfer tube 4 is a pipe that cools the exhaust gas G1 by recovering the heat retained in the exhaust gas G1 flowing in the pipe L1b with a fluid (e.g., thermal oil) flowing inside the heat transfer tube 4.

[0062] Specifically, the heat transfer tube 4 is attached to at least one of the inner walls of the bottom portion L1b1, the ceiling portion L1b2, and the side wall portion L1b3, for example. The heat transfer tube 4 recovers the heat contained in the exhaust gas G1 by, for example, recovering radiant heat emitted from the exhaust gas G1 flowing through the pipe L1b.

[0063] That is, when the temperature of the exhaust gas G1 discharged from the incinerator 1 exceeds the heat resistance temperature of the heat exchanger 2, for example, in the incineration system 300, it is necessary to cool the exhaust gas G1 discharged from the incinerator 1. Here, for example, when the exhaust gas G1 is cooled by spraying water, the incineration system 300 cannot fully recover the latent heat of the water vapor generated by the spraying of water, and there is a possibility that the heat contained in the exhaust gas G1 cannot be fully recovered.

[0064] Therefore, in the incineration system 300 of this embodiment, for example, a heat transfer tube 4 is installed along the inner wall of the pipe L1b, so that the pipe L1b functions as a heat exchanger (boiler). Then, in the incineration system 300, for example, the exhaust gas G1 discharged from the incinerator 1 is cooled in the pipe L1b and then supplied to the heat exchanger 2.

[0065] As a result, the incineration system 300 in this embodiment is able to efficiently recover the heat contained in the exhaust gas G1 while, for example, cooling the temperature of the exhaust gas G1 supplied to the heat exchanger 2 to below the heat resistance temperature of the heat exchanger 2.

[0066] In addition, the incineration system 300 in this embodiment can suppress adhesion (adhesion) of incineration ash (e.g., molten incineration ash) to the pipes L1 and L2 by, for example, cooling the exhaust gas G1 in the pipe L1b. Therefore, the incineration system 300 can suppress the occurrence of blockages in the pipes L1 and L2, for example.

[0067] The bottom L1b1 in this embodiment may have, for example, the inclined portion SL1 or the inclined portion SL2 described in Fig. 4. That is, the incineration system 300 in this embodiment may discharge the incineration ash accumulated on the bottom L1b1 to the pipe L1a side or the pipe L1c side, for example, by dropping it outside the pipe L1b.

[0068] [Modification of the incineration system 300 in the third embodiment] Next, a modified example of the incineration system 300 in the third embodiment (hereinafter, simply referred to as a modified example) will be described.

[0069] In the incineration system 300 in the third embodiment, the heat transfer tube 4 may be provided only on the side wall portion L1b3 among the bottom portion L1b1, the ceiling portion L1b2, and the side wall portion L1b3. In other words, in the incineration system 300 in the third embodiment, the heat transfer tube 4 may not be provided on the bottom portion L1b1 or the ceiling portion L1b2. Specifically, in this case, the heat transfer tube 4 may be attached along the inner wall of the side wall portion L1b3, for example.

[0070] As a result, in the incineration system 300 of this modified example, for example, by making the ceiling portion L1b2 detachable from the side wall portion L1b3 (see FIG. 3), it becomes possible to replace the ceiling portion L1b2 or the heat transfer tube 4.

[0071] Specifically, in the incineration system 300, for example, when the refractory material of the ceiling portion L1b2 is worn, it is possible to replace only the ceiling portion L1b2. Therefore, in the incineration system 300, even when the refractory material of the ceiling portion L1b2 is worn, it is not necessary to replace the entire pipe L1b.

[0072] Furthermore, in the incineration system 300 of this modified example, for example, by not providing the heat transfer tube 4 at the bottom L1b1, it becomes possible to provide the discharge port L1d, tapered member L1e, and discharge pipe L1f described in FIG. 2 at the bottom L1b1.

[0073] As a result, the incineration system 300 in this modified example can, for example, efficiently discharge the incineration ash accumulated on the bottom L1b1 from the discharge port L1d while cooling the exhaust gas G1 flowing through the pipe L1b. [Explanation of symbols]

[0074] 1: Incinerator 1a: Fluidized bed 1b: Ceiling 1c: Outlet 2: Heat exchanger 3: Discharge section 4: Heat transfer tube 100: Incineration system 200: Incineration system 300: Incineration system B1: Blower L1: Piping L1a: Piping L1b: Piping L1b1: Bottom L1b2: Ceiling L1b3: Side wall L1b4: Flange L1b5: Connection material L1c: Piping L2: Piping FL: Horizontal section SL1: Inclined section SL2: Inclined section

Claims

1. An incinerator for incinerating the material to be treated; A flue for supplying exhaust gas discharged from the incinerator to a downstream facility, The flue has a first pipe extending horizontally, The incineration system, wherein the first piping has a discharge section that discharges incineration ash contained in the exhaust gas to the outside of the first piping.

2. The incineration system according to claim 1 , wherein a discharge port for discharging the incineration ash is provided at a bottom of the first pipe as at least a part of the discharge section.

3. The flue has a second pipe extending vertically and communicating at an upper end with one end of the first pipe, The incineration system according to claim 1 , wherein the bottom of the first pipe has a sloped portion that slopes downward from the first position toward the one end as at least a part of the discharge section.

4. An incinerator for incinerating the material to be treated; A flue for supplying exhaust gas discharged from the incinerator to a downstream facility, The flue has a first pipe extending horizontally, An incineration system, wherein the first piping is provided with a heat transfer tube that cools the exhaust gas by a fluid flowing therethrough.

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