JP2016166704A - Incombustible discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent incombustibles from moving around to between a casing of a screw conveyor and a rotary sieve.SOLUTION: There is provided an incombustible discharge device which separates a fluid medium 2 and incombustibles 3 extracted by a screw conveyor 4 from a fluid floor type combustion furnace by a rotary sieve 5 and discharges the incombustibles 3, an upstream-side frame 8 of a sieve body 6 of the rotary sieve 5 being provided with a plate 15 projecting inward. Plates 15 and 16 suppress incombustibles 3, turned over by an incombustible scooping-up member 21 inside the sieve body 6 during rotation thereof from moving around into a gap G between a casing 4a of the screw conveyor 4 and the upstream-side frame 8.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a non-combustible material discharge device used for discharging non-combustible materials from a fluidized bed incinerator that incinerates waste such as garbage.

  The incombustible material discharge device of the fluidized bed incinerator includes a sand discharger (screw conveyor) that extracts and transfers a fluid medium such as sand and incombustible material from the fluidized bed incinerator, and a fluid medium transferred by the screw conveyor. And a rotating sieve that separates incombustibles are known (see, for example, Patent Document 1 (FIG. 4)).

  The rotary sieve has a configuration in which a sieve main body, which is a cylindrical bar screen that gradually increases in diameter from the upstream side toward the downstream side, is arranged with the axial direction sideways and is rotated by a rotary drive mechanism. ing.

  The sieve body is arranged so that the opening on the upstream side covers the outer periphery on the downstream side of the screw conveyor, and the flow medium and incombustible material sent out from the screw conveyor can be received on the inner side near the upstream side of the sieve body. It can be done.

  The non-combustible material discharge device causes the fluid medium and non-combustible material transferred by the screw conveyor to be introduced into the upstream side of the screen body while the screen body of the rotary screen is rotationally driven. Thus, while the fluid medium and the incombustible material are sequentially sent to the downstream side according to the inclination from the upstream side to the downstream side of the outer peripheral portion (peripheral wall portion) of the sieve body in the rotating sieve body, A fluid medium of a size that can pass through and a non-combustible material that cannot pass through are separated.

JP 2003-262320 A

  However, since the thing described in patent document 1 is arrange | positioned so that the opening part of the upstream of a sieve main body may be covered on the outer periphery of the downstream of a screw conveyor, the clearance gap is formed between both. Therefore, when the non-combustible material is scraped up in the circumferential direction in the sieve body and dropped, or due to some other factor, in the unlikely event that the non-combustible material moves in the direction of the gap, The incombustible material may go around (enter) the gap. In this way, when an incombustible material wraps around the gap, the actual state is that the incombustible material stays in the gap and is difficult to be discharged. Therefore, at the time of maintenance and inspection of the incombustible material discharge device, it is necessary to check whether there is an incombustible material that has entered the gap or to take out the incombustible material that has entered the gap.

  Therefore, the present invention intends to provide a non-combustible material discharge device that can suppress the incombustible material from flowing into the gap between the outer periphery on the downstream side of the screw conveyor and the upstream side of the sieve body.

  In order to solve the above-mentioned problems, the present invention provides a screw conveyor that extracts and transfers a fluid medium and incombustible material from a fluidized bed incinerator, and a flow that is downstream of the screw conveyor and is transferred by the screw conveyor. In the non-combustible material discharge device provided with a rotating sieve that separates the medium and the non-combustible material with a rotating sieve main body, the sieve main body opens on the upstream side, and the upstream opening is formed on the downstream side of the screw conveyor. It arrange | positions so that it may overlap with an outer periphery, and it is set as the structure provided with the protrusion member made to protrude to the casing side of the said screw conveyor inside the said sieve main body which overlaps with the downstream of the said screw conveyor.

  The sieve body includes a cylindrical sieve part, an upstream frame located on the upstream side of the sieve part, and a downstream frame located on the downstream side of the sieve part, and the projecting member includes the sieve part It can also be set as the structure used as the ring-shaped plate which protrudes inward toward the casing of the said screw conveyor upstream.

  The screw conveyor includes another protruding member that protrudes toward the sieve body on the outside of the casing that overlaps the upstream side of the sieve body, and an outer peripheral edge of the other protruding member is an inner peripheral edge of the protruding member. It is good also as a structure arrange | positioned closely so that it may overlap in the axial center direction of a part and a sieve main body.

  The sieve body includes a plurality of flat bar units formed by connecting a plurality of flat bars extending in the upstream and downstream directions, and the protruding member is provided on the inner side of the upstream end of each flat bar unit. It can also be set as the protrusion member which has the inclined surface used as a downward slope on the side.

  According to the non-combustible material discharge device of the present invention, it is possible to suppress the non-combustible material from entering the outer periphery on the downstream side of the screw conveyor and the upstream side of the sieve body.

It is a cut side view showing an outline of a 1st embodiment of an incombustible discharge device. It is an enlarged view of the A section of FIG. It is the figure which looked at the plate provided in the outer periphery of a screw conveyor from the downstream, (a) is a schematic diagram which shows the structure in case the casing and screen body of a screw conveyor are coaxially arranged, (b) is a screw conveyor It is a schematic diagram which shows the structural example in case a sieve main body is eccentrically arrange | positioned with respect to the casing of this. It is a perspective view which expands and shows a part of circumferential direction of the sieve main body of a rotary sieve. It is the schematic which expand | deploys and shows FIG. 4 on a plane. The outline | summary of 2nd Embodiment of an incombustible material discharge | emission apparatus is shown, and it is a cutting | disconnection side view corresponding to FIG. It is a perspective view which expands and shows a part of circumferential direction of the sieve main body of a rotary sieve. (A) is the schematic which expands and shows FIG. 7 on a plane, (b) is the BB direction arrow directional view of (a).

  Hereinafter, the incombustible discharge apparatus of this invention is demonstrated with reference to drawings.

[First Embodiment]
1 to 5 show a first embodiment of the present invention.

  FIG. 1 is a cut side view showing an outline of the present embodiment, FIG. 2 is an enlarged view of a portion A in FIG. 1, and FIG. 3 is a view of a plate provided on the outer periphery of the screw conveyor as viewed from the downstream side. Fig. 3B is a schematic diagram showing a configuration in which the casing of the screw conveyor and the sieve body of the rotary sieve are arranged coaxially, and Fig. 3 (b) is a case where the sieve body is arranged eccentrically with respect to the casing of the screw conveyor FIG. FIG. 4 is an enlarged perspective view showing a part in the circumferential direction of the sieve main body of the rotary sieve, and FIG. 5 is a schematic view showing FIG. 4 developed on a plane.

  As shown in FIG. 1, the incombustible material discharging apparatus 1 of the present embodiment includes a screw conveyor 4 that extracts and transfers a fluid medium 2 such as sand and an incombustible material 3 from a fluidized bed incinerator (not shown), a screw It is on the downstream side of the conveyor 4 and is configured to include a rotating sieve 5 that separates the fluid medium 2 and the incombustible material 3 transferred by the screw conveyor 4.

  In this embodiment, the side (the right side in FIGS. 1 and 2) on which the rotary sieve 5 is disposed with respect to the screw conveyor 4 is the downstream side, and the opposite side (the left side in FIGS. 1 and 2) is the upstream side. And

  The rotary sieve 5 is configured to include a sieve body 6 and a rotation drive mechanism 7 that rotationally drives the sieve body 6.

  The sieve body 6 has a cylindrical shape (hollow truncated cone shape) that gradually increases in diameter from the upstream side toward the downstream side. On the upstream side of the sieve body 6, a ring-shaped upstream frame 8 having a diameter larger than the downstream outer diameter of the casing 4 a of the screw conveyor 4 is provided, and on the downstream side, the diameter is larger than that of the upstream frame 8. A ring-shaped downstream frame 9 is provided.

  The screen body 6 is supported in a posture in which the axial direction is set to be horizontal, and an upstream frame 8 and a downstream frame 9 are supported by a casing 10 covering the screen body 6 via a guide roller 11 and a guide roller 12, respectively. . Thereby, the sieve main body 6 can be rotated around its axis.

  As shown in FIGS. 1 and 2, the upstream frame 8 includes a cylindrical body 13 extending in the axial direction of the sieve body 6, and a ring attached to the downstream side of the cylindrical body 13 so as to protrude outward in a flange shape. It is comprised from the fixed plate 14 of a shape. The cylindrical body 13 is supported by the guide roller 11.

  Further, the fixed plate 14 which is the downstream portion of the upstream frame 8 has a projecting member as a member for preventing the incombustible material from entering around the inner diameter side than the downstream outer diameter of the casing 4 a of the screw conveyor 4. A ring-shaped plate 15 having a larger inner diameter is attached with bolts or the like in a coaxial arrangement. Thereby, the upstream frame 8 has a configuration in which a plate 15 protruding inward toward the outer surface on the downstream side of the casing 4a is provided in the downstream portion. For this reason, the gap G between the casing 4a and the upstream frame 8 is closed at a position corresponding to the downstream portion of the upstream frame 8 except for a region near the casing 4a by the plate 15. Therefore, the sieve main body 6 is suppressed when the incombustible material 3 wraps around the gap G inside the upstream frame 8 from the upstream end portion of the flat bar unit 20 described later during use.

  In addition, even if the plate 15 vibrates in each part of the incombustible discharge device 1 or a dimensional change caused by a temperature change, a portion closest to the casing 4a at the inner peripheral side end of the plate 15 is present. The inner diameter of the plate 15 is set so as not to interfere with the casing 4a. Therefore, a gap is formed between the inner peripheral end of the plate 15 and the casing 4a.

  Further, a ring-shaped plate 16 having an outer diameter larger than the inner diameter of the plate 15 is attached to the outer periphery on the downstream side of the casing 4a as another projecting member for preventing the incombustible material from wrapping around. At this time, as shown in FIG. 3A, when the casing 4a and the sieve main body 6 indicated by a two-dot chain line are arranged coaxially, the plate 16 is attached concentrically to the casing 4a. You can do it. Thereby, when the sieve main body 6 rotates, the outer peripheral edge of the plate 16 always overlaps with the inner peripheral edge of the plate 15 rotating together with the sieve main body 6 in the axial direction.

  On the other hand, as illustrated in FIG. 3B, when the sieve body 6 indicated by a two-dot chain line is eccentric with respect to the casing 4 a, for example, is arranged eccentrically upward, the plate 16 is centered. What is necessary is just to make it attach eccentrically with respect to the casing 4a as arrangement | positioning matched with the axial center of the sieve main body 6. FIG. Also by this, when the sieve main body 6 rotates, the outer peripheral edge of the plate 16 always overlaps with the inner peripheral edge of the plate 15 rotating together with the sieve main body 6 in the axial direction.

  The plate 15 and the plate 16 are close to each other, but are attached so as not to contact each other. As a result, the gap G between the casing 4a and the upstream frame 8 is closed by the plate 16 in a region near the casing 4a, which is the remaining part of the portion blocked by the plate 15 as described above. It is. Therefore, when the sieve main body 6 is used, the incombustible material 3 is more reliably suppressed from entering the gap G inside the upstream frame 8 from the upstream end portion of the flat bar unit 20 described later.

  As shown in FIG. 1, the downstream frame 9 includes a cylindrical body 17 extending in the axial direction of the sieve body 6 and a ring-shaped fixing plate 18 attached to the cylindrical body 17 so as to protrude inward. It is said that. In addition, the inner peripheral side end of the fixed plate 18 is configured not to protrude toward the center of the sieve body 6 from the surface of each flat bar 19 of the flat bar unit 20 described later. The cylindrical body 17 is supported by the guide roller 12.

  As shown in FIG. 4, the sieve body 6 has a large number of flat bars 19 extending in the direction from the upstream side to the downstream side between the upstream frame 8 and the downstream frame 9 to form gaps in the circumferential direction. Are arranged. The gap between the adjacent flat bars 19 is set to a size that allows the fluid medium 2 to pass therethrough but prevents the incombustible material 3 larger than the fluid medium 2 from passing therethrough. The gap between the flat bars 19 is widened from the upstream side to the downstream side in the transfer direction of the fluid medium 2 and the incombustible 3. The gap between the flat bars 19 on the downstream side is set in accordance with the maximum particle diameter of the fluid medium 2, and the gap between the flat bars 19 together with the fluid medium 2 unless the size is not the incombustible 3. Never fall off.

  Therefore, the flat bar 19 is connected to each other by a connecting member (not shown) for each of the plurality of flat bars 19 arranged with the predetermined gap therebetween to form a rectangular flat bar unit 20.

  The sieve body 6 has a configuration in which a plurality of flat bar units 20 are disposed at intervals in the circumferential direction. Thereby, between the upstream frame 8 and the downstream frame 9 of the sieve body 6, as schematically shown in FIG. 5, between the adjacent flat bar units 20, from the upstream side toward the downstream side. A gap that gradually increases in width is formed. In each gap, an incombustible material scraping member 21 that also serves as a gap closing member is disposed.

  The non-combustible material scraping member 21 is a member that protrudes toward the inside of the sieve body 6. For example, as shown in FIGS. 4 and 5, the plate material is bent into a mountain shape having a trapezoidal cross section, It is set as the structure which has the surface 21a and the side surface 21b of the both sides which pinches | interposes the top surface 21a. Furthermore, the nonflammable material scraping member 21 is directed from the upstream side toward the downstream side so that the width of the bottom portion opposite to the top surface 21a matches the width of the gap between the flat bar units 20 described above. The width is gradually increased. For example, the nonflammable material scraping member 21 has a top surface 21a that gradually becomes wider from the upstream side toward the downstream side. Further, a closing member 21c is attached between the top surface 21a and the both side surfaces 21b at one end portion serving as the upstream end portion and the other end portion serving as the downstream end portion of the non-combustible material scraping member 21. In addition, although the nonflammable material scraping member 21 was described as a hollow member formed by bending a plate material into a mountain shape having a trapezoidal cross section, it may be a solid member.

  As a result, the sieve body 6 has an integrated structure in which the flat bar units 20 and the non-combustible material scraping members 21 are alternately arranged over the entire circumference in the circumferential direction between the upstream frame 8 and the downstream frame 9. It has a cylindrical structure. Therefore, the screen main body 6 functions as a screen portion including a plurality of flat bar units 20 between the upstream frame 8 and the downstream frame 9.

  Each incombustible material scraping member 21 is configured to protrude toward the axial center of the sieve body 6 from the surface of each flat bar 19 of the flat bar unit 20. Thereby, when the sieve body 6 rotates, the incombustible material 3 put into the sieve body 6 is scraped up in the circumferential direction by the incombustible material scooping members 21 and then falls to the bottom in the sieve body 6. The operation is repeated. By repeating the operation of scraping and dropping, the incombustible material 3 is gradually sent to the downstream side, and the hollow incombustible material 3 such as an empty can is reversed many times, so it has entered inside. The fluid medium 2 is gradually extracted and separated.

  It should be noted that the amount of each non-combustible material scraping member 21 protruding from the surface of each flat bar 19 is desirable for the diameter of the sieve body 6, the reversal process by scraping up the non-combustible material 3, and the stirring in the sieve body 6. What is necessary is just to set suitably according to the capability to be carried out. Moreover, the amount of protrusion from the surface of the flat bar 19 does not have to be constant from the upstream end to the downstream end of each incombustible material scraping member 21. Further, the amount of protrusion of each incombustible material scraping member 21 from the surface of the flat bar 19 is not necessarily uniform.

  The procedure for producing the sieve body 6 having the above-described configuration is preferably as follows. That is, first, a plurality of incombustibles in the circumferential direction are provided between the upstream frame 8 and the downstream frame 9 with an interval corresponding to the width dimension of the flat bar unit 20 (dimension in the direction orthogonal to the upstream and downstream directions). A scraping member 21 is disposed. In this state, the upstream side and the downstream side of each incombustible material scraping member 21 are connected to the fixing plate 14 of the upstream frame 8 and the fixing plate 18 of the downstream frame 9, respectively. Thus, a frame corresponding to the shape of the flat bar unit 20 is formed on the inner side surrounded by the upstream frame 8 and the downstream frame 9 and the nonflammable material scraping member 21 adjacent in the circumferential direction. Thereafter, the flat bar unit 20 is arranged on each frame, and each flat bar unit 20 is attached so as to be bridged between the fixed plate 14 and the fixed plate 18 to form the sieve body 6.

According to this configuration, the sieve main body 6 can easily attach and detach each flat bar unit 20, so that maintenance and replacement work of each flat bar unit 20 can be facilitated.

  In addition, the procedure in the case of manufacturing the sieve main body 6 is not restricted to the above-mentioned thing, For example, the procedure and flat which arrange | position the nonflammable material scraping member 21 between the upstream frame 8 and the downstream frame 9 are flat. The procedure for arranging the bar unit 20 may be interchanged, and the nonflammable material scraping member 21 and the flat bar unit 20 may be alternately arranged between the upstream frame 8 and the downstream frame 9. Good.

  For example, as shown in FIG. 1, the rotational drive mechanism 7 uses a fixed plate 14 of the upstream frame 8 as a sprocket wheel having teeth on the outer periphery, and is provided above the fixed plate 14 to drive a motor or the like. 22, a sprocket 24 attached to an output shaft 23 a of the speed reducer 23, and a chain 25 wound endlessly around the sprocket 24 and the sprocket wheel of the fixed plate 14. ing. Thereby, the rotational driving force output from the output shaft 23a of the speed reducer 23 by the operation of the drive device 22 is transmitted to the fixed plate 14 via the sprocket 24 and the chain 25, so that the rotary sieve is integrated with the fixed plate 14. 5 can be rotated. The configuration of the rotational drive mechanism 7 is an example. If the sieve main body 6 can be rotationally driven, the rotational drive mechanism of the type shown in Patent Document 1 and others are shown in FIG. Of course, a rotational drive mechanism having any configuration other than the above may be adopted.

  In FIG. 1, 26 is a fluid medium discharge chute formed on the casing 10 covering the sieve body 6, and 27 is an incombustible discharge chute. Reference numeral 28 denotes a trough portion (trough portion) that is provided at the downstream end of the casing 4a of the screw conveyor 4 and guides the introduction of the fluid medium 2 and the incombustible material 3 into the sieve body 6.

  When using the non-combustible material discharge device 1 of the present embodiment having the above-described configuration, the sieve body 6 of the rotary sieve 5 is driven to rotate in advance by the rotation drive mechanism 7. In this state, the incombustible material discharging apparatus 1 extracts the fluidized medium 2 and the incombustible material 3 from the fluidized bed incinerator by the screw conveyor 4. The fluid medium 2 and the incombustible material 3 are transferred to the downstream side by the screw conveyor 4 and are introduced into the inside of the sieve body 6 from the flange portion 28 of the casing 4a.

  The fluidized medium 2 and the incombustible material 3 charged inside the sieve body 6 pass through the inside of each flat bar unit 20 as the sieve body 6 rotates and the diameter of the sieve body 6 increases downstream. Then, it is stirred in the rotational direction while moving downstream. During this time, the fluid medium 2 falls through the gaps between the flat bars 19 of the flat bar unit 20 and is discharged through the fluid medium discharge chute 26. The incombustible material 3 is received by the side surface 21b positioned on the front side in the rotational direction of the non-combustible material scooping member 21 that protrudes to the inside of the screen main body 6 from the flat bar 19 of each flat bar unit 20, and the screen main body. 6 is scraped up in the circumferential direction along the rotational direction 6.

  Thereafter, the posture in which the side surface 21b located on the front side in the rotational direction of the non-combustible material scraping member 21 that moves in the circumferential direction along with the rotation of the sieve body 6 is inclined in the axial direction of the sieve body 6 from the horizontal state. Then, the incombustible material 3 that has been scraped is dropped onto the inner bottom portion of the sieve body 6. Since the incombustible material 3 is reversed every time this fall occurs, the fluid medium 2 contained in the hollow incombustible material 3 such as an empty can is extracted. For this reason, the fluid medium 2 and the incombustible 3 are more reliably separated.

  When the nonflammable material scraping member 21 is configured so that the top surface 21a becomes wider from the upstream side toward the downstream side, when the nonflammable material scraping member 21 assumes a lateral posture as the sieve body 6 rotates. The side surface 21b located on the front side in the rotational direction may have a downward slope toward the upstream side. For this reason, the incombustible material 3 may fall upstream along the downward slope of the side surface 21b. Even in this case, the incombustible discharge device 1 of the present embodiment corresponds to the downstream portion of the upstream frame 8 in the gap G between the upstream frame 8 of the sieve body 6 and the downstream side of the casing 4a. Since the plate 15 is protruded inward toward the casing 4a at the position where the incombustible material 3 is moved, the incombustible material 3 can be prevented from entering the gap G. Furthermore, according to the configuration in which the plate 16 is provided outside the casing 4a, the gap G is more reliably closed by the plate 15 and the plate 16, so that the incombustible material 3 can be more reliably guided to the inside of the gap G. Can be suppressed.

  Even if the non-combustible material 3 shows a behavior that moves in the direction of the gap G due to some factor other than being picked up and dropped, the non-combustible material is operated in the same manner as described above. 3 to the inside of the gap G can be suppressed.

  In the present embodiment, the non-combustible material lifting member 21 has a mountain-shaped structure obtained by bending a plate material. Therefore, the strength is higher than when a simple flat bar is used as the non-combustible material lifting member. The fear can be less.

  The incombustible material 3 separated from the fluid medium 2 while being reversed by the incombustible material scraping member 21 inside the sieve body 6 is discharged from the downstream side of the sieve body 6 and discharged through the incombustible material discharge chute 27. Is done.

[Second Embodiment]
6 to 8 (a) and 8 (b) show a second embodiment of the present invention. 6 shows an outline of the main part of the present embodiment, a cut side view corresponding to FIG. 2, FIG. 7 is an enlarged perspective view showing a part of the circumferential direction of the sieve body of the rotary sieve, FIG. (A) is the schematic which expands and shows FIG. 7 on a plane, FIG.8 (b) is a BB direction arrow line view of Fig.8 (a).

  In this embodiment, in the same configuration as that of the first embodiment, instead of the configuration in which the upstream frame 8 of the sieve body 6 is provided with a plate 15 for preventing the incombustible material 3 from wrapping around, the sieve body 6 is configured. A protruding member 29 that is a protruding member serving as a member for preventing the incombustible material from entering around is provided on the upstream surface of each flat bar unit 20.

  As shown in FIG. 8B, the protruding member 29 has a configuration of a triangular side surface having an inclined end surface 30 having the highest upstream end and a downward slope from the upstream side to the downstream side. Further, the height of the protruding member 29 is set so that the position of the top portion on the upstream side protrudes inward from the upstream frame 8 in a state of being attached to the flat bar unit 20.

  In the present embodiment, since the plate 15 is not provided on the sieve body 6, the plate 16 on the screw conveyor 4 side to be disposed close to the plate 15 is also omitted. Other configurations are the same as those of the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

  By using the incombustible material discharging apparatus 1 of the present embodiment in the same manner as in the first embodiment, the fluid medium 2 and the incombustible material 3 introduced into the inside of the sieve body 6 from the screw conveyor 4 are inside the sieve body 6. The fluid medium 2 is separated while being agitated, and passes between the flat bars 19 of the flat bar unit 20 and is discharged to the fluid medium discharge chute 26. Even if the non-combustible material 3 is a hollow non-combustible material 3 such as an empty can, the process of being scraped up by the non-combustible material scraping member 21 in the circumferential direction and then dropped to the inner bottom portion of the sieve body 6 is repeated. The fluid medium 2 contained therein is separated from the fluid medium 2 in a state where the fluid medium 2 is extracted. Thereafter, the incombustible material 3 is discharged from the downstream side of the sieve body 6 and is discharged through the incombustible material discharge chute 27.

  Furthermore, in the present embodiment, the inclined surface 30 of the protruding member 29 provided to protrude toward the inside of the sieve body 6 at the upstream end of each flat bar unit 20 is directed from the upstream side toward the downstream side. The slope is larger than that of each flat bar unit 20. Further, the protruding member 29 protrudes inward from the upstream frame 8 at the position of the upstream top portion.

  For this reason, in this embodiment, even if the incombustible material 3 is dropped upstream from the incombustible material scooping member 21 that is in the horizontal orientation as in the first embodiment, the dropped incombustible material 3 hits the protruding member 29. Then, the incombustible 3 is moved to the downstream side by the gradient of the inclined surface 30.

  Thereby, according to this embodiment, it can suppress that a noncombustible material 3 wraps around in the clearance G between the outer periphery of the downstream side of the screw conveyor 4, and the upstream side of the sieve main body 6. FIG.

  The present invention is not limited to the above embodiments, and the upstream frame 8 and the downstream frame 9 of the sieve body 6 can hold the cylindrical structures on the upstream and downstream sides of the sieve body 6. Further, as long as the sieve body 6 can be rotatably supported, a configuration other than that shown in the drawings may be used.

  In the second embodiment, the protruding member 29 has been described as a configuration having a triangular side surface having an inclined surface 30 that is inclined downward from the upstream side to the downstream side. However, the inclined surface 30 has an inclined angle that changes in the middle. Alternatively, it may be a curved surface whose inclination angle changes continuously.

  Further, in the second embodiment, the case where the protruding member 29 is provided on the upstream side of the flat bar unit 20 instead of providing the plate 15 for preventing the incombustible material from flowing around in the first embodiment has been described. The projection member 29 may be used in combination. Of course, the protruding member 29 may be used in combination with the configuration including the plate 15 and the plate 16 shown in FIGS.

  The non-combustible material scraping member 21 is shown as having a trapezoidal cross-sectional shape, but the non-combustible material 3 is scraped in the circumferential direction along with the rotation of the sieve body 6 and dropped to the inner bottom of the sieve body 6. As long as it can be performed, for example, a rectangular cross section may be used, or a nonflammable material scraping member having an arbitrary shape other than that illustrated, such as a plate-like flat bar, may be employed.

  The sieve body 6 is preferably provided with an incombustible material scooping member 21 inside thereof, but may be configured such that the incombustible material scooping member is omitted. In that case, a triangular or trapezoidal blocking member corresponding to the shape of the gap is attached to the gap between the flat bar units 20 arranged in the circumferential direction to prevent the flow medium 2 and the incombustible material 3 from passing through. You just have to do it.

  The sieve main body 6 is a flat bar 19 for forming a bar screen. In the state where the flat bar unit 20 connected in advance for each of the plurality of flat bars 19 is formed, the upstream frame 8 and the downstream frame 9 However, it may be configured such that a large number of flat bars 19 are directly attached between the upstream frame 8 and the downstream frame 9 to form a bar screen.

  The sieve body 6 has been described as having a bar screen with a large number of flat bars 19 whose outer peripheral portion (peripheral wall portion) extends in the direction from the upstream side to the downstream side. It is good also as a structure provided with the bar screen by bars other than the flat bar 19 made into the shape. Furthermore, the screen body 6 includes a screen other than the bar screen as long as the screen allows the fluid medium 2 to pass through the outer peripheral portion (peripheral wall portion) while preventing passage of the non-combustible material 3 larger than the fluid medium 2. It may be a different configuration.

  1 and 2 and FIG. 6 are shown in an easy-to-understand manner for convenience of explanation, and the arrangement and dimensions of each part are merely examples, and the present invention is not limited thereto.

  Furthermore, the flat bar unit 20 in FIG. 4 and FIG. 5 and FIG. 7 and FIG. 8A shows an outline, and the gap between the flat bars 19 is not limited to the illustrated one.

  In addition, it goes without saying that various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Incombustible material discharge apparatus 2 Fluid medium 3 Incombustible material 4 Screw conveyor 4a Casing 5 Rotating sieve 6 Sieve body 8 Upstream frame 9 Downstream frame 15 Plate (protruding member)
16 Plate (other protruding members)
19 Flat bar 20 Flat bar unit (sieving part)
29 Protruding member (protruding member)
30 Inclined surface

Claims (4)

A screw conveyor that extracts and transfers the fluid medium and incombustible material from the fluidized bed incinerator, and the fluid medium and the incombustible material that are transferred by the screw conveyor are separated by a rotating sieve body. In a non-combustible material discharge device equipped with a rotating sieve,
The sieve body has an upstream opening, and the upstream opening is arranged so as to overlap the downstream outer periphery of the screw conveyor,
An incombustible material discharge device comprising: a protruding member that protrudes toward the casing side of the screw conveyor, inside the sieve body that overlaps the downstream side of the screw conveyor. The sieve body includes a cylindrical sieve part, an upstream frame located on the upstream side of the sieve part, and a downstream frame located on the downstream side of the sieve part,
The non-combustible material discharge device according to claim 1, wherein the projecting member is a ring-shaped plate that projects inward toward the casing of the screw conveyor on the upstream side of the sieve portion. The screw conveyor includes another protruding member that protrudes toward the sieve body on the outside of the casing that overlaps the upstream side of the sieve body, and an outer peripheral edge of the other protruding member is an inner peripheral edge of the protruding member. The non-combustible material discharge device according to claim 2, wherein the non-combustible material discharge device is disposed so as to be overlapped with each other so as to be overlapped with each other in the axial direction of the screen and the screen body. The sieve body includes a plurality of flat bar units formed by connecting a plurality of flat bars extending in the upstream and downstream directions,
The non-combustible material discharge device according to claim 1, wherein the projecting member is a projecting member provided on an inner side of an upstream end portion of each flat bar unit and having an inclined surface having a downward slope on the downstream side. .

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