JP2006317110A - Ash pusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the rate at which ash is taken back when a pusher retreats, thereby keeping ash from accumulating behind the pusher. <P>SOLUTION: The ash pusher 1 comprises a cooling water tank 2 having an ash storage chamber 4 storing cooling water W for cooling ash A from an incinerator; and a pusher device 3 having a pusher 6 for pushing out ash A' in the ash storage chamber 4. The pusher 6 comprises a fixed pusher head 6f suspended at the front end of a pusher top 6a and having a notch 6e therein, and a movable pusher head 6j swingably suspended at the front of the pusher top 6a for opening and closing the notch 6e. When the pusher 6 advances, the movable pusher head 6j swings backward because of the resistance of the ash A' and the cooling water W and closes the notch 6e. When the pusher 6 retreats, the movable pusher head 6j swings forward because of the resistance of the cooling water W and opens the notch 6e, causing the ash A' accumulated behind the pusher 6 to be discharged forward from the notch 6e together with the cooling water W. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention stores cooling water mainly for main ash discharged from a combustion stoker after a stoker-type waste incinerator that incinerates waste such as municipal waste, and ash such as stalking fall ash that has fallen to a hopper under the stoker. The ash extruding device is designed to discharge into the cooling water tank and cool the fire extinguisher, and the ash (wet ash) that has settled and deposited in the cooling water tank is pushed out of the cooling water tank by the pusher device. The present invention relates to an ash extruding device that reduces ash take-back when the pusher retreats and suppresses ash accumulation on the back side of the pusher by improving the pusher of the pusher device that pushes out the deposited ash. Is.

  In general, in a stoker-type waste incinerator, an ash extrusion device that extinguishes and cools high-temperature ash discharged from the post-combustion stalker is installed at a downstream position of the post-combustion stalker. This ash extruding device has a water-sealed structure that keeps the inside pressure of the stoker-type waste incinerator from outside air and maintains the pressure inside the furnace at a predetermined pressure. It is installed for the purpose of preventing ash scattering and improving handling by using ash.

  Conventionally, as this type of ash extrusion apparatus, ash discharged from a stoker-type waste incinerator is put into an ash storage chamber in which cooling water is stored, extinguished and cooled, and ash (wet) deposited on the bottom of the ash storage chamber is deposited. Ashes are sequentially fed into the inclined discharge passage by the pusher device that repeatedly moves forward and backward, and the discharge passage is filled with ash while performing gravity dehydration and self-condensation using the inclination of the discharge passage. In addition, there is known a structure in which the ash in the discharge passage is continuously pushed out by the pushing action of the pusher and dropped and discharged.

  That is, the ash extrusion device 1 communicates with the ash storage chamber 4 and the ash storage chamber 4 storing cooling water W for extinguishing and cooling the ash A discharged from the stoker-type waste incinerator, as shown in FIGS. The ash A ′ (wet ash) that has been extinguished and cooled is discharged, and the cooling water tank 2 is provided with an upward inclined discharge passage 5 and is provided in the ash storage chamber 4 so as to be movable back and forth toward the discharge passage 5. The pusher 6 that pushes the ash A ′ settled and deposited on the bottom of the ash storage chamber 4 to the discharge passage 5 side while sliding on the upper surface of the bottom of the ash storage chamber 4 and the drive device 7 that moves the pusher 6 back and forth (hydraulic cylinder) And a pusher device 3 composed of

Specifically, as shown in FIG. 7, the cooling water tank 2 has a bottom portion formed in a curved concave shape, a casing 8 that forms an ash storage chamber 4 that stores a certain amount of cooling water W, and a front side ( 7 is connected to the right side of FIG. 7, and has a substantially rectangular tube-shaped inclined chute 9 that forms a rising inclined discharge passage 5 through which fire-cooled ash A ′ (wet ash) is discharged, and the rear side of the casing 8. A partition wall 11 that divides the ash storage chamber 4 into an ash receiving chamber 4 ′ and a pusher standby chamber 4 ″ in the front-rear direction, and a lever case 10 connected to the left side of FIG. A throat portion 8a for immersing the water in the cooling water W to seal the inside and outside of the stoker-type waste incinerator is provided.
Further, a blocking seal plate 12 is provided at the lower end of the partition wall 11 to the extent that the ash A ′ does not enter the pusher standby chamber 4 ″ side during the movement of the pusher 6 so as not to interfere with the top surface 6a of the pusher 6. It has been.
Furthermore, a liner 13 for preventing wear of the bottom of the ash reservoir 4 and a guide rail 14 for guiding the pusher 6 are provided at the bottom of the ash reservoir 4 respectively.

On the other hand, as shown in FIG. 7, the pusher device 3 is connected to a main shaft 19 that is rotatably mounted on a boundary portion between the casing 8 of the cooling water tank 2 and the lever case 10, and is connected to the main shaft 19 via a link mechanism 20. The pusher 6 is composed of a drive device 7 composed of a hydraulic cylinder connected to the main shaft 19 via a lever 21. When the hydraulic cylinder which is the drive device 7 expands and contracts, the main shaft 19 is fixed via the lever 21. The pusher 6 that rotates forward and backward by an angle and is connected to the main shaft 19 via the link mechanism 20 is positioned in the ash receiving chamber 4 ′ (the one-dot chain line position in FIG. 7) and the pusher standby chamber 4 ″. Is moved back and forth in the front-rear direction along the bottom of the ash reservoir chamber 4 over the standby position (solid line position in FIG. 7).
Further, as shown in FIG. 8, the pusher 6 has a welding integrated structure in which a plurality of metal plates (pusher top plate 6a, pusher side plate 6b, pusher head 6f, etc.) are assembled into a box shape by welding. A sliding liner 6g for positioning that slides along the guide rail 14 is provided at the lower end of the pusher head 6f.

  In FIG. 5, 15 is a main ash chute of a stoker type incinerator connected to the casing 8 of the cooling water tank 2, 16 is an inspection port formed in the cooling water tank 2, and 17 is a water level attached to the cooling water tank 2. A control adjustment detector 18 is a cooling water inlet formed in the cooling water tank 2, 26 is a tip chute connected to the inclined chute 9, and 27 is an ash vibrating conveyor connected to the tip chute 26.

  Thus, according to the ash extrusion device 1, the high-temperature ash A dropped from the main ash chute 15 of the stoker-type waste incinerator is charged into the ash storage chamber 4 of the cooling water tank 2 in which the cooling water W is stored. Then, it is extinguished and cooled by the cooling water W in the ash receiving chamber 4 ′ of the ash storage chamber 4, and gradually settles and deposits as wet ash A ′ on the bottom of the ash receiving chamber 4 ′. At this time, the ash A dropped and discharged from the main ash chute 15 into the ash storage chamber 4 is repeatedly polluted and dispersed by hitting the water surface by the impact of the drop, and the stirring action caused by the forward and backward movements of the pusher 6 also overlaps and floats. Settling down to sludge.

  The ash A ′ (wet ash) deposited and deposited on the bottom of the ash receiving chamber 4 ′ is moved to the ash receiving chamber 4 ′ side by the pusher head 6 f when the pusher 6 moves back and forth between the standby position and the pushing position. To the inclined chute side 9 forming the upward inclined discharge passage 5. During the movement of the pusher 6, the blocking seal plate 12 prevents the ash A ′ on the ash receiving chamber 4 ′ side from entering the pusher standby chamber 4 ″ side, so that the ash A ′ is as much as possible on the ash receiving chamber 4 ′ side. The pusher 6 can be continuously pushed out and discharged.

  The ash A ′ pushed out by the pusher 6 passes under the throat portion 8 a and enters the inclined chute 9, and then gradually fills the inclined chute 9 together with the ash A ′ pushed out by the pusher 6. Go closer. When the ash A ′ is accumulated to some extent in the inclined chute 9, the ash A 4 ′ is forcibly applied to the ash A 4 ′ when the pusher 6 moves forward to consolidate the ash A ′. The ash A 'is prevented from slipping.

  When the inside of the inclined chute 9 is filled with ash A ′, the ash A ′ repeats gravity dehydration and self-condensation due to the inclination of the inclined chute 9, and further, the pusher 6 pushes out to dehydrate and condense the ash A ′. Finally, the ash A ′ protrudes from the inclined chute 9 into the tip chute 26 and collapses and is discharged to the ash vibration conveyor 27 on the downstream side.

By the way, in the ash extrusion apparatus 1, when the pusher 6 in the standby position advances to the extrusion position, the ash A ′ and cooling water W (contaminated water) deposited and accumulated by the pusher head 6f integrated with the pusher 6 is used. The water level on the ash receiving chamber 4 'side temporarily rises and the water level on the pusher standby chamber 4 "side decreases. This difference in water level causes the ash receiving chamber 4' side to pusher standby chamber 4" side. In addition, a flow of contaminated water is generated through the gap between the pusher top plate 6a and the blocking seal plate 12 and other gaps (such as the gap between the pusher side plate 6b and the cooling water tank 2). This polluted water contains small particles of ash, which move to the pusher standby chamber 4 ″ side.
On the other hand, when the pusher 6 in the push-out position moves back to the standby position, the pusher head 6f serves as a scraping plate, and the water level on the pusher standby chamber 4 ″ side temporarily rises, which is opposite to the pusher 6 being pushed out. In addition, a flow of contaminated water from the pusher standby chamber 4 ″ side to the ash receiving chamber 4 ′ side occurs.

  As described above, the contaminated water repeatedly moves back and forth between the ash receiving chamber 4 'side and the pusher standby chamber 4 "side as the pusher 6 reciprocates. As a result, the ash concentration in the water on the pusher standby chamber 4 ″ side is increased so that the ash concentration of the ash A ′ is deposited on the bottom of the pusher standby chamber 4 ″ and scum is generated. .

  In this way, when the ash A ′ is accumulated on the pusher standby chamber 4 ″ side, it is scummed in the detection part of the water level control adjustment detector 17 (electrode type level sensor, capacitance type level sensor, etc.). The problem is that the ash A 'adheres and the water level control becomes impossible, even when a non-contact microwave level sensor or the like is used for the water level control adjustment detector 17 when the pusher 6 moves backward. The rising of the ash A 'accumulated at the bottom of the pusher standby chamber 4 ″ side has an adverse effect such as an increased pulling wave and a large rise in the water surface. In fact, although the water level is low, it is recognized that the water level is normal. , Often malfunction.

Therefore, in the conventional ash extrusion apparatus 1, although it is very dangerous during operation, an operator opens the inspection port 10a formed on the upper surface of the lever case 10 to clean the inside of the pusher standby chamber 4 ″. It was.
However, in this case, since the bottom of the pusher standby chamber 4 ″ is covered with the pusher top plate 6a, it is difficult to clean the inside of the pusher standby chamber 4 ″, and the ash A ′ accumulated using the inspection port 10a is not collected. Since cleaning is performed by a method such as sticking and crushing with a stick or by blowing off the accumulated ash A 'using water pressure, cleaning itself is difficult and the cleaning range is also extremely limited There was a problem of being able to. In addition, when the entire area of the pusher standby chamber 4 ″ is cleaned, it takes a long time to use the time when the furnace is closed, but there is only a method of cleaning the entire area of the pusher standby chamber 4 ″ after removing the pusher 6 once, and the work time is very long. There was a problem of becoming.

On the other hand, in the field of this type of ash extrusion apparatus 1, in order to solve the above-described problems, an ash extrusion apparatus capable of facilitating cleaning of deposited ash and shortening the operation time has been developed. JP 2002-257319 A (see Patent Document 1).
That is, although not shown, the ash extrusion apparatus forms an outlet at the bottom of a water storage container (cooling water tank) located on the rear side of the extruder (pusher), and a sealed screw is provided at the outlet. Connect the conveyor, and periodically discharge the ash deposited on the back side of the extruder from the outlet with a screw conveyor, or suck the nozzle on the back side of the pusher in the water storage container (cooling water tank). The hose and pump are connected to this suction nozzle, and the ash deposited on the back side of the extruder is sucked and discharged together with water by the pump, and is further located on the back side of the pusher. A hopper equipped with a drain chute is installed at the bottom of the water storage container (cooling water tank). A pair of upper and lower gate valves are installed on the drain chute, and the ash deposited on the rear side of the extruder is opened and closed. De It is obtained so as to or discharged from the Nhoppa.
However, each of the ash extrusion apparatuses requires a large amount of equipment and equipment, which causes an increase in equipment costs, complicates the structure of the ash extrusion apparatus itself, and requires maintenance work. It was.
JP 2002-257319 A

  The present invention has been made in view of such problems, and the object thereof is to reduce the carry-back of ash when the pusher moves backward, to suppress the accumulation of ash on the rear side of the pusher, and to clean the An object of the present invention is to provide an ash extrusion apparatus capable of relaxing work, shortening cleaning work time, simplifying daily inspection, stabilizing water level control, and the like.

  The inventors of the present application modified the pusher so that the pusher head has a check valve structure, so that the pusher head is closed by the load resistance of ash when the pusher moves forward, and the resistance of the cooling water and the nozzle when the pusher moves backward The pusher head is opened by the shaped throttle passage so that the ash deposited on the rear side of the pusher is blown forward together with the cooling water. In addition, a balance weight is provided on the pusher head, and the pusher head can be moved even with a small force when the pusher moves backward. An ash extrusion device that can be opened has been developed.

  That is, according to the first aspect of the present invention, the ash discharged from the refuse incinerator is stored in the ash storage chamber storing cooling water for extinguishing and cooling, and the ash that has been extinguished and cooled in communication with the ash storage chamber is discharged. A cooling water tank with an inclined discharge passage, and a discharge passage for ash that has settled and accumulated in the ash storage chamber while sliding back and forth in the ash storage chamber toward the discharge passage. In the ash extrusion device composed of a pusher that pushes out to the side and a pusher device that includes a drive device that moves the pusher back and forth, the pusher is continuously connected downward to the rectangular pusher top plate and the front end of the pusher top plate One or more fixed-side pusher heads formed with one or a plurality of cutouts, and one or more that are suspended from the front end of the pusher top plate so as to be swingable in the front-rear direction and open and close the cutouts of the fixed-side pusher heads from the front side. Sheets A movable-side pusher head, and when the pusher moves forward, the movable-side pusher head swings backward due to the resistance of the ash and cooling water deposited and accumulated in the ash storage chamber to close the notch of the fixed-side pusher head, Further, when the pusher is retracted, the cooling water flows from the opening on the rear side of the pusher toward the notch of the fixed side pusher head, and the movable side pusher head swings forward by the resistance force of the cooling water, so that the fixed side pusher head The feature is that the notch is opened and the ash deposited on the rear side of the pusher is discharged together with the cooling water from the notch of the fixed side pusher head to the front of the pusher.

  According to the second aspect of the present invention, the movable pusher head is suspended from the front end of the pusher top plate by a hinge with a balance weight so as to be swingable in the front-rear direction so that the movable pusher head can be opened and closed with a small force. In addition, it is characterized in that the opening degree of the movable pusher head can be adjusted.

  The invention according to claim 3 of the present invention gradually narrows from the rear opening of the pusher toward the notch of the fixed pusher head by a plurality of ribs attached to the lower surface side of the pusher top plate in the lower space of the pusher top plate. This is characterized in that a nozzle-shaped throttle passage is formed.

  The invention of claim 4 of the present invention is characterized in that a kicker for holding the movable pusher head of the pusher in the standby position in the open position is provided at the bottom of the ash storage chamber.

In the ash extrusion apparatus of the present invention, a pusher for pushing out ash (wet ash) deposited and deposited at the bottom of an ash storage chamber is connected downwardly to a pusher top plate and a front end of the pusher top plate, and includes one or more notches. And a movable pusher head that is suspended from the front end of the pusher top plate in a swingable manner in the front-rear direction and opens and closes the notch of the fixed pusher head from the front side. When moving forward, the pusher head on the movable side swings backward due to the resistance of the ash deposited in the ash storage chamber and the resistance of the cooling water, closing the notch of the fixed pusher head. Cooling water flows from the opening on the side toward the notch of the fixed pusher head, and the movable pusher head swings forward by the resistance of this cooling water, and the fixed pusher head Notched opening of Heddo, so that the ash deposited on the rear side of the pusher is discharged from the notch of the stationary pusher head with cooling water to the front of the pusher.
As a result, the ash extruding apparatus of the present invention can reduce the ash carry-back when the pusher is retracted, and can suppress the accumulation of ash on the rear side of the pusher, thereby reducing daily cleaning work. In addition, the cleaning work time can be shortened and daily inspections can be simplified. Further, scummed ash does not adhere to the detection part of the detector for adjusting the water level control, or the water level does not rise greatly when the pusher is retracted, so that the water level control can be stabilized. However, since it is possible to suppress the accumulation of ash on the rear side of the pusher, troubles due to the accumulation of ash are reduced, and the operation efficiency of the waste incinerator can be improved.
Further, the ash extrusion device of the present invention is provided with a balance weight on the movable pusher head of the pusher so that the balance of the movable pusher head can be adjusted and the opening degree can be adjusted. The pusher head can be opened, and the ash deposited on the rear side of the pusher can be reliably and smoothly discharged to the front of the pusher by adjusting the opening of the movable pusher head.
Furthermore, the ash extrusion apparatus of the present invention forms a nozzle-shaped throttle passage that gradually narrows from the opening on the rear side of the pusher toward the notch of the fixed-side pusher head in the space below the pusher top plate. When retreating, due to the resistance of the cooling water and the nozzle effect due to the throttle passage, the movable-side pusher head opens widely, and the ash deposited on the rear side of the pusher can be discharged more reliably and smoothly to the front of the pusher.
Moreover, the ash extrusion device of the present invention is provided with a kicker that holds the movable side pusher head of the pusher in the standby position at the open position at the bottom of the ash storage chamber, so that when ash is accumulated on the rear side of the pusher. The ash behind the pusher can be washed away in front of the pusher by washing with water.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an ash extrusion device 1 according to an embodiment of the present invention, and the ash extrusion device 1 is installed at a downstream position of a post-combustion stoker for a stoker-type waste incinerator that incinerates waste such as municipal waste. The ash A such as the main ash discharged from the post-combustion stalker and the ash A falling ash dropped on the hopper below the stalker is put into the cooling water tank 2 storing the cooling water W, cooled by fire extinguishing, and the cooling water tank 2 The ash A ′ (wet ash) settled and deposited inside is pushed out of the cooling water tank 2 by the pusher device 3 and discharged.

  That is, the ash extruding device 1 includes an ash storage chamber 4 in which cooling water W is stored, a cooling water tank 2 having an upward inclined discharge passage 5 communicating with the ash storage chamber 4, and a discharge passage in the ash storage chamber 4. And a pusher device 3 including a drive device 7 for moving the pusher 6 back and forth to be movable back and forth toward the side 5, and the ash A discharged from the stoker waste incinerator The ash A ′ (wet ash) settled and deposited on the bottom of the ash reservoir 4 is raised by the pusher 6 of the pusher device 3 that repeatedly advances and retreats, and is discharged into an inclined discharge passage. The discharge passage 5 is filled with ash A ′ while gravity dehydration and self-condensation are performed using the inclination of the discharge passage 5, and the pusher 6 presses the inside of the discharge passage 5. Continuously extruding ash A ' It is obtained so as to lower discharge.

Specifically, as shown in FIG. 1, the cooling water tank 2 has a bottom portion formed in a curved concave shape, a casing 8 that forms an ash storage chamber 4 that stores a certain amount of cooling water W, and a front side ( 1 is connected to the right side of FIG. 1, and a substantially rectangular tube-shaped inclined chute 9 that forms an upward inclined discharge passage 5 through which fire-cooled ash A ′ (wet ash) is discharged, and the rear side of the casing 8 A partition case 11 that divides the ash storage chamber 4 into an ash receiving chamber 4 ′ and a pusher standby chamber 4 ″ in the front-rear direction, and a lever case 10 connected to the left side of FIG. A throat portion 8a for immersing the water in the cooling water W to seal the inside and outside of the stoker-type waste incinerator is provided.
Further, a blocking seal plate 12 is provided at the lower end portion of the partition wall 11 so as not to interfere with the upper surface of the pusher 6 so that the ash A ′ does not enter the pusher standby chamber 4 ″ while the pusher 6 is moving. .
Furthermore, a liner 13 for preventing wear of the bottom of the ash reservoir 4 and a guide rail 14 for guiding the pusher 6 are provided at the bottom of the ash reservoir 4 respectively.

  In FIG. 1, 15 is a main ash chute of a stoker type incinerator connected to the casing 8 of the cooling water tank 2, 16 is an inspection port formed in the cooling water tank 2, and 17 is a water level attached to the cooling water tank 2. A control adjustment detector 18 is a cooling water inlet formed in the cooling water tank 2.

  On the other hand, as shown in FIG. 1, the pusher device 3 is connected to a main shaft 19 that is rotatably mounted on a boundary portion between the casing 8 of the cooling water tank 2 and the lever case 10 and a main shaft 19 via a link mechanism 20. The pusher 6 having a tip formed in a check valve structure and a drive device 7 composed of a hydraulic cylinder connected to the main shaft 19 via a lever 21 are configured to expand and contract. Then, the main shaft 19 rotates forward and backward by a predetermined angle through the lever 21, and along with this, the pusher 6 connected to the main shaft 19 through the link mechanism 20 is located in the ash receiving chamber 4 ′ (FIG. 1). 1) and a standby position (solid line position in FIG. 1) located in the pusher standby chamber 4 ″, the ash reservoir chamber 4 reciprocates in the front-rear direction.

  The pusher 6 includes, as shown in FIGS. 1 to 3, a metal rectangular pusher top plate 6a, metal left and right pusher side plates 6b continuously provided downward at both ends of the pusher top plate 6a, and a pusher. A metal pusher rear plate 6d which is provided continuously downward at the rear end of the top plate 6a and forms a large opening 6c, and is provided downwardly at the front end of the pusher top plate 6a, which is smaller than the opening 6c at the central portion. A fixed pusher head 6f made of metal having a notch 6e, and a sliding liner 6g for positioning which is attached to the lower end of the fixed pusher head 6f so as to slightly protrude forward and slides along the guide rail 14. Are attached to the lower surface side of the pusher top plate 6a, and a notch 6 of the fixed-side pusher head 6f is inserted into the space below the pusher top plate 6a from the opening 6c of the pusher rear plate 6d. A plurality of ribs 6i forming nozzle-shaped throttle passages 6h that gradually narrow toward the front, and a forward hinge of the pusher top plate 6a via a normal hinge 22 'and a hinge 22 with a balance weight so as to be swingable in the front-rear direction. The pusher 6 is formed in a thin box shape whose bottom and rear surfaces are opened by a movable pusher head 6j that is suspended and is slightly larger than the cutout 6e that opens and closes the cutout 6e of the fixed pusher head 6f from the front side. During the forward movement, the movable pusher head 6j swings backward by the resistance of the ash A '(wet ash) deposited in the ash storage chamber 4 and the resistance of the cooling water W (contaminated water), and the fixed pusher head 6f The notch 6e is closed, and when the pusher 6 is retracted, the cooling water W passes from the opening 6c of the pusher rear plate 6d through the throttle passage 6h, and the fixed-side pusher head 6 As a result, the movable pusher head 6j swings forward by the resistance force of the cooling water W to open the notch 6e of the fixed pusher head 6f, and the ash A ′ accumulated on the rear side of the pusher 6 Is discharged together with the cooling water W from the notch 6e of the fixed side pusher head 6f to the front of the pusher 6.

  The balance weighted hinge 22 is connected to a fixed plate 22a attached to the pusher top plate 6a, and a movable plate 22b connected to the fixed plate 22a by a shaft 22c so as to be rotatable and attached to the movable pusher head 6j. And an adjustment lever 24, which is fixed to the movable side plate 22b and has a balance weight 23 that is movable and adjustable. The movable side pusher head 6j can be opened and closed with a small force, and the movable side pusher head 6j can be opened and closed. The opening degree can be adjusted. The balance weight 23 has its balance weight 23 adjusted so that the movable pusher head 6j is fully open.

  In the ash extrusion device 1, a kicker 25 is provided at the bottom of the ash storage chamber 4 to hold the movable pusher head 6 j of the pusher 6 at the standby position in the open position. As shown in FIG. 1, the kicker 25 is attached to a stand 25a fixed to the bottom of the ash storage chamber 4, and is attached to the stand 25a so as to be movable in the front-rear direction of the pusher 6. The tip of the movable pusher head 6j of the pusher 6 The opening of the movable side pusher head 6j of the pusher 6 at the standby position can be adjusted by adjusting the position of the stopper 25b.

Next, the case where the high temperature ash A discharged | emitted from the stoker-type incinerator using the ash extrusion apparatus 1 mentioned above is extinguished and cooled and extruded and discharged will be described.
The high-temperature ash A dropped and discharged from the main ash chute 15 of the stoker-type waste incinerator is put into the ash storage chamber 4 of the cooling water tank 2 in which the cooling water W is stored, and enters the ash receiving chamber 4 ′ of the ash storage chamber 4. Then, the water is extinguished and cooled by the cooling water W, and gradually settles and deposits as wet ash A 'at the bottom of the ash receiving chamber 4'.

The ash A ′ (wet ash) deposited and deposited on the bottom of the ash receiving chamber 4 ′ is moved from the ash receiving chamber 4 ′ by the fixed pusher head 6 f and the movable pusher head 6 j of the pusher 6 that moves forward from the standby position to the pushing position. It is pushed out toward the inclined chute 9 that forms the upward inclined discharge passage 5.
In the push-out process of the pusher 6, the pusher 6 located in the pusher standby chamber 4 ″ stands by with its movable side pusher head 6j opened by the kicker 25 in the pusher standby chamber 4 ″. When the pusher 6 starts to move forward, the movable side pusher head 6j is detached from the kicker 25, swings backward due to the resistance of the cooling water W, and completely closes the notch 6e of the fixed side pusher head 6f. The ash A 'is deposited against the chamber 4' and pushed out toward the inclined chute 9 in the same posture.
As a result, the ash A ′ in the ash receiving chamber 4 ′ can be prevented from entering the pusher standby chamber 4 ″ side from the notch 6 e of the fixed pusher head 6 f when the pusher 6 moves forward. At the time of advance, the blocking seal plate 12 provided on the partition wall 11 can prevent the ash A ′ on the ash receiving chamber 4 ′ side from entering the pusher standby chamber 4 ″ side.

When the pusher 6 reaches the push-out position from the standby position, the pusher 6 continues to move backward from the push-out position to the stand-by position by the drive device 7 and the link mechanism 20.
In the pull-in process of the pusher 6, the cooling water W flows into the nozzle-shaped throttle passage 6h from the opening 6c formed in the pusher rear plate 6d, and the notch 6e of the fixed-side pusher head 6f passes through the throttle passage 6h. The movable pusher head 6j is pushed and swung forward by the resistance of the cooling water W and the nozzle effect by the throttle passage 6h, and the notch 6e of the fixed pusher head 6f is opened. Then, the pusher 6 returns from the pushing position to the standby position.
As a result, the ash A ′ on the rear side of the pusher 6 is pushed from the notch 6e opened in the fixed pusher head 6f together with the cooling water W (contaminated water) until the pusher 6 reaches the standby position from the pushing position. 6 will be discharged to the front. Further, the movable side pusher head 6j is easily and reliably opened by the nozzle effect by the throttle passage 6h and the balance weight 23, so that the ash A 'can be discharged more smoothly. Further, even when the pusher 6 is retracted, the blocking seal plate 12 also received by the partition wall 11 can prevent the ash A ′ on the ash receiving chamber 4 ′ side from entering the pusher standby chamber 4 ″ side. The take-back of the ash A ′ when the pusher 6 moves backward is reduced, and the ash A ′ can be prevented from being deposited on the rear side of the pusher 6.

  Then, the ash A ′ pushed out by the pusher 6 passes under the throat portion 8 a and enters the inclined chute 9, and then gradually moves in the inclined chute 9 together with the ash A ′ pushed out by the pusher 6. Go near full. When the ash A ′ is accumulated to some extent in the inclined chute 9, the ash A ′ is forcibly applied to the ash A ′ when the pusher 6 is pushed out to consolidate the ash A ′. The ash A 'is prevented from slipping.

  When the inside of the inclined chute 9 is filled with ash A ′, the ash A ′ repeats gravity dehydration and self-condensation due to the inclination of the inclined chute 9, and further, the pusher 6 pushes out to dehydrate and condense the ash A ′. Finally, the ash A ′ protrudes from the inclined chute 9 into the tip chute, collapses, and is discharged to the downstream ash vibration conveyor.

As described above, the ash extrusion device 1 can discharge the ash A ′ in the pusher standby chamber 4 ″ together with the cooling water W to the front of the pusher 6 when the pusher 6 moves backward. The ash A 'on the ash receiving chamber 4' side penetrates into the pusher standby chamber 4 "side due to the take-out phenomenon, or the gap between the pusher side plate 6b and the cooling water tank 2, the pusher heads 6f and 6j and the ash storage chamber 4 Even if the ash A 'on the ash receiving chamber 4' side enters the pusher standby chamber 4 "side through the gap between the bottom and the gap between the pusher top plate 6a and the blocking seal plate 12, the pusher standby chamber 4" side The ash A ′ can be forcibly discharged by the self-cleaning action of the pusher 6, and the accumulation of the ash A ′ in the pusher standby chamber 4 ″ can be suppressed.
As a result, this ash extrusion apparatus 1 can achieve a reduction in daily cleaning work, a reduction in cleaning work time, simplification of daily inspection, stabilization of water level control, and the like.

FIG. 4 shows another example of the pusher 6 of the ash extruding device 1. The pusher 6 has two notches 6e formed in the fixed-side pusher head 6f and a larger size than the notch 6e in the pusher rear plate 6d. Are further narrowed from the openings 6c of the pusher rear plate 6d toward the notches 6e of the fixed-side pusher head 6f by a plurality of ribs 6i in the space below the pusher top plate 6a. Two nozzle-shaped throttle passages 6h are formed.
The pusher 6 has two notches 6e, two openings 6c and two narrow passages 6h, and the movable-side pusher head 6j is formed to have substantially the same width as the pusher 6, and the sliding liner 6g is placed in the pusher 6. Except for the arrangement, the pusher 6 has the same structure as that of the pusher 6 shown in FIG. 2, and can provide the same effects as the pusher 6 shown in FIG. 2.

In the above embodiment, one or two notches 6e formed in the fixed side pusher head 6f are opened and closed by one movable side pusher head 6j. When a plurality of notches 6e are formed, each notch 6e may be opened and closed separately by a plurality of movable-side pusher heads 6j.
In the above embodiment, the movable side pusher head 6j is attached to the pusher top plate 6a by the hinge 22 with balance weight. However, the movable side pusher head 6j is attached to the pusher top plate 6a by the normal hinge 22. The balance weight 23 may be attached to the movable pusher head 6j itself.

It is a longitudinal cross-sectional view of the ash extrusion apparatus which concerns on embodiment of this invention. It is a perspective view of a pusher in a state where the pusher of the ash extrusion device shown in FIG. 1 is shown and the movable pusher head is swung upward. It is a schematic cross-sectional view of the pusher shown in FIG. It is a perspective view of the pusher in the state where the other example of the pusher is shown and the movable side pusher head and the balance weight hinge are separated from the pusher top plate. It is a front view of the conventional ash extrusion apparatus. It is a top view of the conventional ash extrusion apparatus. It is a longitudinal cross-sectional view of the conventional ash extrusion apparatus. It is a perspective view of the pusher of the conventional ash extrusion apparatus.

Explanation of symbols

  1 is an ash extrusion device, 2 is a cooling water tank, 3 is a pusher device, 4 is an ash reservoir, 5 is a discharge passage, 6 is a pusher, 6a is a pusher top plate, 6e is a notch, 6f is a fixed pusher head, and 6h is Restriction passage, 6i is a rib, 6j is a movable pusher head, 7 is a drive unit, 22 is a hinge, 23 is a balance weight, 24 is an adjustment lever, 25 is a kicker, A is ash, A 'is wet ash, W is cooling water.

Claims (4)

  A cooling water tank equipped with an ascending chamber that stores cooling water for extinguishing and cooling the ash discharged from the waste incinerator, and an ascending inclined discharge passage through which the ash that has been extinguished and cooled is discharged. Pusher that pushes ash that has settled and accumulated in the ash storage chamber toward the discharge passage while moving back and forth while being slidable on the upper surface of the bottom of the ash storage chamber. The pusher device comprises a rectangular pusher top plate and a pusher top plate, and a pusher top plate connected to the front end of the pusher top plate downwardly to form one or a plurality of cutouts. A side pusher head, and one or more movable side pusher heads suspended from the front end of the pusher top plate so as to be swingable in the front-rear direction and opening and closing the notch of the fixed side pusher head from the front side. When the pusher advances, the movable pusher head swings backward due to the resistance of the ash and cooling water that has settled and accumulated in the ash storage chamber to close the notch of the fixed pusher head, and when the pusher moves backward, Cooling water flows from the rear opening toward the notch of the fixed pusher head, and the resistance of this cooling water swings the movable pusher head forward to open the notch of the fixed pusher head. The ash extruding apparatus is characterized in that the ash accumulated on the side is discharged together with the cooling water from the notch of the fixed side pusher head to the front of the pusher.   The movable side pusher head is suspended from the front end of the pusher top plate by a hinge with a balance weight so that it can swing back and forth, and the movable side pusher head can be opened and closed with a small force. The ash extrusion apparatus according to claim 1, wherein   A nozzle-shaped throttle passage gradually narrowing from the rear opening of the pusher toward the notch of the fixed pusher head is formed in the space below the pusher top plate by a plurality of ribs attached to the lower surface side of the pusher top plate. The ash extrusion apparatus according to claim 1 or 2, characterized in that.   4. The ash extrusion apparatus according to claim 1, wherein a kicker for holding a movable side pusher head of a pusher in a standby position at an open position is provided at the bottom of the ash storage chamber.

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