Ejector device and municipal solid waste mobile gasification and melting facility

Abstract

To provide a technology which enables easy and proper cleaning of an inner wall surface of a throat passage to which solid matters, such as ashes contained in a gas to be suctioned, can easily adhere while adopting a rational structure in an ejector device utilized preferably as a dry ejector of a municipal waste flow type gasification melting facility.SOLUTION: An ejector device 5 includes a body casing 10 in which gas passages 51, 52, 53 are formed. The body casing 10 is configured to be dividable in a radial direction of the gas passages 51, 52, 53 in a first portion 10A in which at least a throat passage 52 is formed.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an ejector device including a main body casing having a gas flow path formed therein, the gas flow path including a mixing flow path in which a nozzle section for discharging a driving gas is disposed and which communicates with a suction target gas inlet through which a suction target gas flows in, a throat flow path disposed downstream of the mixing flow path and through which the driving gas is discharged from the nozzle section, and a diffuser flow path disposed downstream of the throat flow path and communicating with a mixed gas outlet, and a dry ejector including the ejector device for extracting exhaust gas in a slag chute as the suction target gas, and a municipal solid waste fluidized gasification and melting facility including the same.

Background Art

[0002] An ejector device mainly used as a dry ejector in a municipal solid waste fluidized gasification and melting facility is known (see, for example, Patent Document 1). In such an ejector device, there is a problem that solids such as ash contained in the suction target gas tend to adhere to the inner wall surface of the throat flow path through which the driving gas is discharged from the nozzle section. In order to solve such a problem, in Patent Document 1, it is proposed to provide an adhesion removing section for removing deposits on the inner wall surface, such as a section for applying vibration to the inner wall surface, a section for blowing air onto the inner wall surface, or a section for mechanically cleaning the inner wall surface.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the ejector device described in Patent Document 1, since it is necessary to add an adhesion removing section, the cost increases, and there are cases where the deposits on the inner wall surface cannot be sufficiently removed only by such an adhesion removing section. In addition, it may be considered to disassemble and clean the ejector device in order to sufficiently remove the deposits. However, in order to disassemble and clean the conventional ejector device, it is necessary to once remove the ejector device from the support portion, which is a very complicated operation. Moreover, during the disassembly and cleaning, it is necessary to stop the operation of the municipal solid waste fluidized gasification and melting facility, so quick work is required. In addition, since the main body casing of the conventional ejector device is generally of a cylindrical integral type, it is difficult for hands and cleaning tools to reach the inner wall surface of the gas flow path formed therein, and it may be difficult to sufficiently remove the deposits. In view of this situation, the main problem of the present invention is to provide a technology that enables easy and quick cleaning of the inner wall surface of the throat passage where solids such as ash contained in the suction target gas tend to adhere, in an ejector device that is suitably used as a dry ejector for a municipal solid waste fluidized gasification and melting facility where ash easily adheres to the throat passage, while adopting a reasonable configuration.

Means for Solving the Problems

[0005] The first characteristic configuration of the ejector device according to the present invention is that a mixing flow path through which a nozzle portion that discharges a driving gas communicates with a suction target gas inlet through which a suction target gas flows in, a throat flow path that is disposed downstream of the mixing flow path and through which the driving gas is discharged from the nozzle portion, and a diffuser flow path that is disposed downstream of the throat flow path and communicates with a mixed gas outlet are formed inside a main body casing, and the ejector device is provided with: The main body casing is configured to be radially divisible at least in a first portion that forms the throat flow path inside. In addition, the characteristic configuration of the municipal solid waste fluidized gasification and melting facility according to the present invention is that the ejector device according to the present invention is provided as a dry ejector for extracting exhaust gas in the slag discharge chute as the suction target gas.

[0006] According to this configuration, by simply performing the simple task of radially dividing the first part of the main casing in which the gas flow passage including the throat flow passage is formed, a cleaning operation for removing deposits on the inner wall surface of the throat flow passage formed inside the first part can be performed quickly. In addition, since the first part of the main casing is radially divided, for example, on a plane through which the axis of the throat flow passage passes, it becomes easier for hands or cleaning tools to reach the inner wall surface of the throat flow passage during the cleaning operation, and deposits on the inner wall surface can be easily removed. Therefore, the present invention can provide a technology that employs a rational configuration in an ejector device that is suitable for use as a dry ejector in a municipal waste fluidized gasification and melting facility where ash is likely to adhere to the throat flow passage, while enabling simple and rapid cleaning of the inner wall surface of the throat flow passage, which is prone to adhesion of solid matter such as ash contained in the gas to be suctioned.

[0007] A second characteristic feature of the ejector device according to the present invention is that the throat passage has a tapered portion that gradually reduces in diameter along the drive gas discharge direction from the nozzle portion, and a small diameter portion that continues downstream from the tapered portion.

[0008] According to this configuration, the first part of the main casing is divided in the radial direction, and cleaning can be performed on the contracted diameter part and the small diameter part of the throat passage, to which solid matter contained in the gas to be sucked is particularly likely to adhere, to easily and quickly remove the adhering matter. That is, the inner wall surface of the contracted diameter part of the throat passage faces the drive gas discharge direction from the nozzle part, so that solid matter in the gas to be sucked that is entrained in the drive gas is likely to adhere to the inner wall surface of the small diameter part of the throat passage. In addition, the gas to be sucked that is entrained in the drive gas is strongly blown against the inner wall surface of the small diameter part of the throat passage due to the increase in flow rate from the contracted diameter part to the small diameter part caused by the narrowing of the flow passage in the contracted diameter part, so that solid matter contained therein is likely to adhere to the inner wall surface of the small diameter part of the throat passage. And, since the first part including the contracted diameter part and the small diameter part as the throat passage can be divided in the radial direction, cleaning can be performed efficiently and effectively on the contracted diameter part and the small diameter part of the throat passage, to which solid matter is likely to adhere.

[0009] The third characteristic configuration of the ejector device according to the present invention is that in the first part, the first casing part is detachable from the fixed casing part fixed to the support part, and the gas flow path is configured to be radially divisible. The attachment of the first casing part to the fixed casing part is performed by a manually operable clamp.

[0010] According to this configuration, in the first part of the main body casing, the attachment and detachment of the first casing part to the fixed casing part can be easily performed by manually operating the above clamp. Therefore, the cleaning of the inner wall surface of the first part of the main body casing can be performed more easily and quickly.

[0011] The fourth characteristic configuration of the ejector device according to the present invention is that a cylindrical liner member forming the throat flow path inside is fitted in the first part. In a state where the first part of the main body casing is radially divided, the liner member is configured to be replaceable.

[0012] According to this configuration, when cleaning the inner wall surface of the throat flow path, in a state where the first part of the main body casing is radially divided, the cylindrical liner member forming the throat flow path inside can be replaced with a cleaned one. Therefore, without waiting for the completion of cleaning the liner member, the operation of a municipal solid waste fluidized gasification melting facility or the like can be performed only by replacing the cleaned liner member, so the time required for cleaning involving the division of the first part of the main body casing can be shortened as much as possible, and the operation stop time of the municipal solid waste fluidized gasification melting facility can be minimized.

[0013] The fifth characteristic configuration of the ejector device according to the present invention is that in the main body casing, the second part forming the diffuser flow path inside is configured to be radially divisible from the first part with respect to the gas flow path.

[0014] According to this configuration, for the diffuser flow path that requires less cleaning frequency than the throat flow path, the second part of the main body casing can be cleaned in a state where it is radially divided, for example, in a plane through which the axis of the diffuser flow path passes. That is, since the first part and the second part in the main body casing can be separately divided, the first part and the second part can be separately divided at different timings according to the difference in cleaning frequency. Also, in the splitting operation of each of the first part and the second part, the splitting range becomes smaller, so the labor of the splitting operation can be reduced.

[0015] The sixth characteristic configuration of the ejector device according to the present invention is that in the second part, the second casing part is detachable from the fixed casing part fixed to the support part, and the gas flow path is configured to be radially divisible. The attachment of the second casing part to the fixed casing part is performed by bolt fastening.

[0016] According to this configuration, in the second part of the main body casing, the attachment of the second casing part to the fixed casing part can be firmly performed by inexpensive bolt fastening.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0018] Embodiments of the present invention will be described with reference to the drawings. The ejector device 5 of the present embodiment shown in FIGS. 1 to 6 is configured as a dry ejector for extracting the exhaust gas in the slag discharge chute 3 as a gas G1 to be sucked in the municipal solid waste fluidized gasification and melting facility 100 of the present embodiment shown in FIG. 7. For example, as shown in FIG. 7, the municipal solid waste fluidized gasification and melting facility 100 includes a gasification furnace 1 for thermally decomposing waste such as municipal solid waste, and a melting furnace 2 for burning the combustible gas and char generated by the thermal decomposition with combustion air to melt the ash. Then, the slag generated by melting the ash in the melting furnace 2 is discharged from the slag discharge chute 3 provided at the lower end thereof. The ejector device 5 is configured to generate a suction force when a driving gas G2 such as compressed air is supplied, and extract the exhaust gas in the slag discharge chute 3 as a gas G1 to be sucked by the suction force. Further, a mixed gas G3 of the sucked gas G1 to be sucked and the driving gas G2 is discharged from the ejector device 5, and the mixed gas G3 is supplied to a boiler or the like for heat recovery.

[0019] Hereinafter, the detailed configuration of the ejector device 5 of the present embodiment will be described with reference to FIGS. 1 to 6. As shown in FIGS. 1 to 3, the ejector device 5 includes a main body casing 10 installed on a support portion 40 made of channel steel or the like. Inside the main body casing 10, as shown in FIG. 2, a mixing flow path 51, a throat flow path 52, and a diffuser flow path 53 are provided as gas flow paths in order from the upstream side to the downstream side along the flow direction of the driving gas G2 and the mixed gas G3. Note that the mixing flow path 51, the throat flow path 52, and the diffuser flow path 53 are formed as continuous flow paths with the connection end portions thereof having the same diameter or substantially the same diameter.

[0020] As shown in FIG. 2, the mixing flow path 51 is formed as a flow path in which a nozzle portion 46 for discharging the driving gas G2 is disposed and leads to a suction target gas inlet 29 into which the suction target gas G1 flows. The throat channel 52 is arranged on the downstream side of the mixing channel 51 and is formed as a channel through which the driving gas G2 is discharged from the nozzle portion 46. Further, the throat channel 52 has a conical cylindrical diameter-reducing portion 52A that gradually reduces in diameter along the discharge direction of the driving gas G2 from the nozzle portion 46, and a cylindrical small-diameter portion 52B that is continuous with the downstream side of the diameter-reducing portion 52A and has a longer channel length than the diameter-reducing portion 52A. The diffuser channel 53 is continuous with the downstream side of the throat channel 52 and is formed as a conical cylindrical channel that gradually increases in diameter along the flow direction of the mixed gas G3, and the downstream side thereof communicates with the mixed gas outlet 21 from which the mixed gas G3 flows out.

[0021] In the ejector device 5 configured as described above, when the driving gas G2 such as compressed air is discharged from the nozzle portion 46 toward the diameter-reducing portion 52A of the throat channel 52, the mixing channel 51 becomes negative pressure as the flow velocity increases from the diameter-reducing portion 52A to the small-diameter portion 52B, and the suction target gas G1 is sucked into the mixing channel 51 through the suction target gas inlet 29. Then, the driving gas G2 that has entrained the suction target gas G1 flows from the throat channel 52 to the diffuser channel 53 while reducing the flow velocity as the mixed gas G3, and flows out to the outside through the mixed gas outlet 21 from the diffuser channel 53. In such an ejector device 5, solids such as ash contained in the suction target gas G1 tend to adhere to the inner wall surface of the throat channel 52 in particular. In particular, the inner wall surface of the diameter-reducing portion 52A of the throat channel 52 faces the discharge direction of the driving gas G2 from the nozzle portion 46, so solids in the suction target gas G1 entrained by the driving gas G2 tend to adhere. Also, the inner wall surface of the small-diameter portion 52B of the throat channel 52 is also strongly blown by the suction target gas G1 entrained by the driving gas G2 due to the increase in flow velocity from the diameter-reducing portion 52A to the small-diameter portion 52B caused by the narrowing of the channel in the diameter-reducing portion 52A, and solids contained therein tend to adhere.

[0022] The ejector device 5 of the present embodiment has a feature that enables easy and quick cleaning of the inner wall surface of the throat passage 52, where solids such as ash contained in the gas G1 to be sucked are likely to adhere, while adopting a reasonable configuration. Details thereof will be described below.

[0023] As shown in FIGS. 2 and 3, the main body casing 10 includes a fixed casing portion 19 fixed to the support portion 40, and a first casing portion 11 and a second casing portion 16 configured to be detachable from the fixed casing portion 19.

[0024] As shown in FIGS. 2 and 3, the fixed casing portion 19 is formed as a casing having a semi-cylindrical recess on the lower half of the entire gas passage including the mixing passage 51, the throat passage 52, and the diffuser passage 53. At the end of the fixed casing portion 19 on the diffuser passage 53 side (downstream side), an outlet side flange 20 with a mixed gas outlet 21 opened is provided. At the end of the fixed casing portion 19 on the mixing passage 51 side (upstream side), a nozzle insertion plate 24 having a nozzle insertion hole 25 into which a nozzle portion 46 of a nozzle member 45 to be described later is inserted is provided. In addition, at the lower part of the fixed casing portion 19 on the mixing passage 51 side (upstream side), an inlet side flange 28 with a suction target gas inlet 29 formed is provided. Further, on both side edge portions of the upper surface side of the fixed casing portion 19, flange portions 19A extending laterally (see FIG. 1) are respectively provided.

[0025] As shown in FIGS. 2 and 3, the nozzle member 45 has a cylindrical nozzle portion 46 and a nozzle mounting flange portion 47 extending outward from the outer periphery of the nozzle portion 46. And the nozzle portion 46 is inserted into a nozzle insertion hole 25 formed in the nozzle insertion plate 24 of the fixed casing portion 19. In that state, the nozzle mounting flange portion 47 is fixed to the nozzle insertion plate 24 of the fixed casing portion 19 by bolts or the like, and the nozzle member 45 is attached to the nozzle insertion plate 24 of the fixed casing portion 19.

[0026] As shown in FIGS. 1 to 3, the first casing portion 11 is formed as a casing having a semi-cylindrical recess on the upper half of the mixing flow path 51 and the throat flow path 52, which are the upstream portions of the gas flow path. On both side edges of the lower surface side of the first casing portion 11, flange portions 11A extending laterally are respectively provided. And, as also shown in FIGS. 4 and 5, the first casing portion 11 and the fixed casing portion 19 are assembled in a state where their respective flange portions 11A and 19A are overlapped with a gasket interposed therebetween as appropriate. And, the mixing flow path 51 and the throat flow path 52 of these gas flow paths are formed inside the first portion 10A defined by the upstream portion of the first casing portion 11 and the fixed casing portion 19 to which it is attached. That is, the first portion 10A of the main body casing 10 is configured to be separable in the vertical direction (an example of the radial direction) with the plane passing through the axis of the gas flow path such as the throat flow path 52 as a boundary in a form in which the first casing portion 11 is detachable from the fixed casing portion 19. Furthermore, a handle 13 for easily gripping the first casing portion 11 is provided on the upper portion of the first casing portion 11. Also, this handle 13 is disposed above the small-diameter portion 52B in the first casing portion 11, the shape of the handle 13 is simplified, and the upward protrusion is suppressed.

[0027] With the above configuration, in the main body casing 10, by simply performing an operation of dividing the first portion 10A including the throat flow path 52 having the reduced-diameter portion 52A and the small-diameter portion 52B where solids are particularly likely to adhere in the vertical direction, the cleaning operation of removing the deposits on the inner wall surface can be easily and quickly performed on the reduced-diameter portion 52A and the small-diameter portion 52B of the throat flow path 52. Also, since the mixing flow path 51 is included in the first portion 10A, the first portion 10A can be divided in the vertical direction, and the cleaning operation can be easily and quickly performed on the mixing flow path 51 as well. Furthermore, since the first portion 10A of the main body casing 10 is divided vertically in the plane through which the axial cores of the gas flow paths of the throat flow path 52 and the mixing flow path 51 pass, hands and cleaning tools can easily reach the inner wall surfaces of the throat flow path 52 and the mixing flow path 51 during the cleaning operation, and the deposits on the inner wall surfaces can be easily removed.

[0028] As shown in FIG. 1, the attachment of the first casing portion 11 to the fixed casing portion 19 is performed by a plurality of manually operable clamps 41. For example, as shown in FIG. 4, the clamp 41 disposed on the upstream side (the right side in FIG. 1) of the first casing portion 11 is supported by the nozzle portion insertion plate 24 of the fixed casing portion 19, and the first casing portion 11 is biased toward the lower fixed casing portion 19 (the state shown by the solid line in FIG. 4) and the state in which the biasing is released (the state shown by the two-dot chain line in FIG. 4) can be manually switched. Further, as shown in FIG. 5, the clamp 41 disposed on the downstream side (the left side in FIG. 1) of the first casing portion 11 is supported by the support portion 40, and the state in which the first casing portion 11 is biased toward the lower fixed casing portion 19 and the state in which the biasing is released can be manually switched. With such a configuration, in the first portion 10A of the main body casing 10, the attachment and detachment of the first casing portion 11 to and from the fixed casing portion 19 can be easily performed by manually operating such clamps 41. Therefore, even when the cleaning frequency involving the division of the first portion 10A in the main body casing 10 is as high as several times a day (for example, three times), the cleaning of the inner wall surfaces of the gas flow paths such as the throat flow path 52 in the first portion 10A can be performed more easily and quickly.

[0029] As shown in FIGS. 2 and 3, in the first portion 10A of the main body casing 10, a cylindrical liner member 12 that forms the throat passage 52 therein is fitted into recesses for forming the throat passage 52 in the first casing portion 11 and the fixed casing portion 19 that constitute the first portion 10A. That is, the liner member 12 has a conical cylindrical first portion 12A that constitutes the inner wall surface of the reduced diameter portion 52A of the throat passage 52, and a cylindrical second portion 12B that is connected thereto and constitutes the inner wall surface of the small diameter portion 52B of the throat passage 52. Also, the lower half of the liner member 12 is fitted into a recess formed in the fixed casing portion 19 along the outer shape of the liner member 12, and serves as a lining portion that covers the inner wall surface of the recess. On the other hand, the upper half of the liner member 12 is fitted into a recess formed in the first casing portion 11 along the outer shape of the liner member 12, and serves as a lining portion that covers the inner wall surface of the recess. And the liner member 12 is configured to be replaceable in a state where the first portion 10A of the main body casing 10 is divided in the vertical direction. That is, when cleaning the inner wall surface of the throat passage 52, it is only necessary to replace the liner member 12 with a cleaned one in a state where the first portion 10A of the main body casing 10 is divided in the vertical direction. Therefore, without waiting for the completion of cleaning the liner member 12, the operation of a municipal solid waste fluidized gasification melting facility or the like can be performed only by replacing the cleaned liner member 12. Thus, the time required for cleaning can be shortened as much as possible, the operation stop time of the municipal solid waste fluidized gasification melting facility 100 (FIG. 7) can be minimized, and the degree of freedom in the timing of performing the cleaning operation can be improved. In addition, when adopting such a configuration, it is necessary to prepare a plurality of liner members 12 including those mounted on the main body casing 10 and spare ones.

[0030] As shown in FIGS. 1 to 3, the second casing portion 16 is provided separately from the first casing portion 11, and is formed as a casing having a semi-cylindrical recess in the upper half of the diffuser passage 53 which is the downstream side portion of the gas passage. On both side edges of the lower surface side of the second casing portion 16, flange portions 16A extending laterally are respectively provided. The second casing portion 16 and the fixed casing portion 19 are assembled with their respective flange portions 16A and 19A overlapped with a gasket interposed therebetween as appropriate. And the diffuser flow path 53 of these gas flow paths is formed inside the second portion 10B defined by the second casing portion 16 and the downstream portion of the fixed casing portion 19 to which it is attached. That is, the second portion 10B of the main body casing 10 is configured to be separable in the vertical direction (an example of the radial direction) with a plane through which the axis of the diffuser flow path 53 passes as a boundary, in a form in which the second casing portion 16 is detachable from the fixed casing portion 19.

[0031] With the above configuration, by simply performing the simple operation of dividing the second portion 10B of the main body casing 10 in the vertical direction, it is possible to easily and quickly perform a cleaning operation for removing deposits on the inner wall surface of the diffuser flow path 53 formed inside the second portion 10B. That is, in the main body casing 10, since the first portion 10A and the second portion 10B can be separately divided, the first portion 10A and the second portion 10B can be separately divided at different timings according to the difference in cleaning frequency. Further, in the respective dividing operations of the first portion 10A and the second portion 10B, the dividing range becomes smaller, so the labor of the dividing operation is reduced. Furthermore, since the second portion 10B of the main body casing 10 is divided in the vertical direction by a plane through which the axis of the diffuser flow path 53 passes, it becomes easier for hands and cleaning tools to reach the inner wall surface of the diffuser flow path 53 in the cleaning operation, and deposits on the inner wall surface can be easily removed.

[0032] Furthermore, as shown in FIG. 1, the second casing portion 16 is attached to the fixed casing portion 19 by fastening a plurality of bolts 42. For example, as shown in FIG. 6, the flange portion 16A of the second casing portion 16 and the flange portion 19A of the fixed casing portion 19 can be fastened by bolts 42 in a state where they are overlapped. Therefore, in the second portion 10B of the main body casing 10, the second casing portion 16 can be firmly attached to the fixed casing portion 19 by fastening inexpensive bolts 42.

[0033] As shown in FIGS. 2 and 3, an insert member 32 for connecting the downstream end of the first casing portion 11 and the upstream end of the second casing portion 16 in a positioned state is interposed therebetween. Further, as shown in FIG. 6, this insert member 32 is directly welded to the flange portion 19A of the fixed casing portion 19, and the second casing portion 16 is fixed to the insert member 32 by bolts 37 with a gasket interposed therebetween as appropriate. Similarly, as shown in FIGS. 2 and 3, an insert member 31 for connecting the nozzle portion insertion plate 24 of the fixed casing portion 19 and the upstream end of the first casing portion 11 in a positioned state is interposed therebetween. Further, an insert member 33 for connecting the downstream end of the second casing portion 16 and the outlet side flange 20 of the fixed casing portion 19 in a positioned state is interposed therebetween.

[0034] 〔Alternative Embodiment〕 Another embodiment of the present invention will be described. Note that the configurations of the embodiments described below are not limited to being applied individually, and can also be applied in combination with the configurations of other embodiments.

[0035] (1) In the above embodiment, when configuring the first portion 10A and the second portion 10B of the main body casing 10 to be separable in the radial direction of the gas flow paths 51, 52, 53, the plane through which the axial cores of the gas flow paths 51, 52, 53 pass is used as a boundary to be separable in the vertical direction. However, the splitting direction can be appropriately changed. For example, the first portion 10A and the second portion 10B may be configured to be separable in the horizontal direction with the plane through which the axial cores of the gas flow paths 51, 52, 53 pass as a boundary.

[0036] (2) In the above-described embodiment, the throat passage 52 included in the first portion 10A of the main body casing 10 is configured to have a reduced-diameter portion 52A and a small-diameter portion 52B. However, for example, the throat passage 52 may be configured to include only the reduced-diameter portion 52A, and the diffuser passage 53 included in the second portion 10B may be connected to the reduced-diameter portion 52A.

[0037] (3) In the above-described embodiment, in the main body casing 10, the first casing portion 11 corresponding to the mixing passage 51 and the throat passage 52 and the second casing portion 16 corresponding to the diffuser passage 53 are detachably configured with respect to the fixed casing portion 19 extending over the entire gas passages 51, 52, 53. However, for example, only the first casing portion 11 may be configured to be detachable with respect to the fixed casing portion 19, and the second casing portion 16 may be configured to be integral with the fixed casing portion 19. Further, the first casing portion 11 is not limited to corresponding to the mixing passage 51 and the throat passage 52 as in the above-described embodiment. For example, it may correspond to only the throat passage 52 or the reduced-diameter portion 52A of the throat passage 52.

[0038] (4) In the above-described embodiment, the first casing portion 11 is attached to the fixed casing portion 19 by a manually operable clamp 41, and the second casing portion 16 is attached to the fixed casing portion 19 by fastening bolts 42. However, these attachment methods can be changed as appropriate.

[0039] (5) In the above-described embodiment, the cylindrical liner member 12 that forms the throat passage 52 inside is provided. However, a similar liner member may be separately provided for the diffuser passage 53. For example, the liner member provided for the diffuser passage 53 is fitted into the second portion 10B of the main body casing 10 to form the diffuser passage 53 inside, and can be replaced in a state where the second portion 10B is divided in the vertical direction. Further, instead of providing separate liner members for each of the throat passage 52 and the diffuser passage 53, an integral liner member extending from the throat passage 52 to the diffuser passage 53 may be provided. For example, the liner member provided from the throat passage 52 to the diffuser passage 53 is fitted across the first portion 10A and the second portion 10B of the main body casing 10 to form the throat passage 52 and the diffuser passage 53 therein, and can be exchanged in a state where the first portion 10A and the second portion 10B are divided in the vertical direction.

Explanation of Signs

[0040] 3 Discharge chute 5 Ejector device 10 Main body casing 10A First portion 10B Second portion 11 First casing portion 12 Liner member 16 Second casing portion 19 Fixed casing portion 21 Mixed gas outlet 29 Suction target gas inlet 29 Support portion 41 Clamp 42 Bolt 46 Nozzle portion 51 Mixed flow path (gas flow path) 52 Throat flow path (gas flow path) 52A Reduced diameter portion 52B Small diameter portion 53 Diffuser flow path (gas flow path) 100 Fluidized gasification melting facility G1 Suction target gas G2 Driving gas G3 Mixed gas

Claims

1. An ejector device comprising a main body casing having a gas flow path formed therein, the gas flow path including a mixing flow path communicating with a suction target gas inlet through which a suction target gas flows and into which a nozzle section for discharging a driving gas is disposed, a throat flow path disposed downstream of the mixing flow path and through which the driving gas is discharged from the nozzle section, and a diffuser flow path disposed downstream of the throat flow path and communicating with a mixed gas outlet, wherein the main body casing is configured to be radially divisible at least in a first portion forming the throat flow path therein, and in the first portion, the gas flow path is configured to be radially divisible in such a manner that a first casing portion is detachable from a fixed casing portion fixed to a support portion by manual operation.

2. The ejector device according to claim 1, wherein the attachment of the first casing portion to the fixed casing portion is performed by a manually operable clamp.

3. An ejector device comprising a main body casing having a gas flow path formed therein, the gas flow path including a mixing flow path communicating with a suction target gas inlet through which a suction target gas flows and into which a nozzle section for discharging a driving gas is disposed, a throat flow path disposed downstream of the mixing flow path and through which the driving gas is discharged from the nozzle section, and a diffuser flow path disposed downstream of the throat flow path and communicating with a mixed gas outlet, wherein the main body casing is configured to be radially divisible at least in a first portion forming the throat flow path therein, and in the main body casing, a second portion forming the diffuser flow path therein is configured to be radially divisible separately from the first portion.

4. In the second portion, the gas flow path is configured to be radially divisible in such a manner that a second casing portion is detachable from a fixed casing portion fixed to a support portion, and the attachment of the second casing portion to the fixed casing portion is performed by bolt fastening. The ejector device according to claim 3.

5. The ejector device according to any one of claims 1 to 4, wherein the throat flow path has a diameter-reducing portion that gradually reduces in diameter along the driving gas discharge direction from the nozzle section and a small-diameter portion continuous with the downstream side of the diameter-reducing portion.

6. A cylindrical liner member forming the throat flow path therein is fitted in the first portion. The ejector device according to any one of claims 1 to 5, wherein the liner member is configured to be replaceable in a state where the first portion of the main body casing is divided in the radial direction.

7. An urban waste flow-type gasification and melting facility including the ejector device according to any one of claims 1 to 6 as a dry ejector for extracting exhaust gas in a slag discharge chute as the gas to be sucked.

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