JP6718563B1 - Ash extrusion apparatus and method for modifying ash extrusion apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress accumulation of return ash with a simple structure. SOLUTION: The cooling tank 2 has an inlet 21 and an outlet 22 for incineration ash, a scraper 3 for pushing out the incineration ash in the cooling tank 2, and a drive device 4 for driving the scraper 3, The bottom surface 23 of 2 includes a first inclined surface 23a and a second inclined surface 23b, the stored water is stored at a predetermined water level, and the drive device 4 causes the scraper 3 to reciprocate along the bottom surface 23. It has the 1st piping 5 arrange|positioned above the 2nd inclined surface 23b, and the position which does not contact the scraper 3 and the arm 41. One end 5a of the first pipe 5 is arranged below a predetermined water level, and the gas introduced from the other end 5b is ejected to the one end 5a between the second inclined surface 23b and the scraper 3. A spout 50 is provided. The return ash to be deposited on the second inclined surface 23b side is agitated by the water flow of the stored water generated by the gas ejected from the first ejection port 50 and the bubbles by the gas. [Selection diagram] Figure 1

Description

The present invention relates to an ash extruder and a method for modifying the ash extruder.

BACKGROUND ART Conventionally, an incinerator plant has been known as a plant for incinerating wastes such as refuse. In the incinerator (for example, stoker furnace) in this plant, the ash (incinerated ash) generated by burning the incinerator is dropped from the ash chute to the ash extruder and cooled by the stored water in the ash extruder. After that, the ash is ejected from the ash extrusion device to the conveying device. The ash extrusion device is provided with a scraper (also referred to as a “pusher”) that pushes incinerated ash cooled with stored water to an outlet. The scraper reciprocates in the forward direction toward the discharge port side and in the reverse direction opposite thereto, and pushes out the incinerated ash in the stored water.

By the way, in a general ash extrusion apparatus, as shown in Patent Document 1, for example, the reciprocating operation of the scraper tends to cause the incinerated ash to enter and accumulate under the back side of the scraper. In this way, the incineration ash that has entered the space (the “pusher waiting chamber 4″” in Patent Document 1) existing in the direction opposite to the extruding direction of the incineration ash is also called “return ash”. If the amount of accumulated return ash increases, it may interfere with the driving of the scraper and prevent the incineration ash from being pushed out from the discharge port.

For this reason, conventionally, the ash extruder is regularly cleaned to remove the returned ash, or the pusher itself for pushing out the incinerated ash is devised like the ash extruder of Patent Document 1. Suppresses the accumulation of return ash.

JP, 2006-317110, A

However, cleaning of the ash extrusion device cannot be performed at any time because it is necessary to stop the incinerator, and it requires a great deal of labor and time. Further, in the configuration as in Patent Document 1 in which the structure of the scraper itself is devised to suppress the return ash accumulation, the structure becomes complicated and the manufacturing cost increases.
The present invention has been devised in view of such problems, does not require frequent cleaning, has a simple structure, and an ash extrusion device that can suppress the accumulation of return ash, and general It is an object of the present invention to provide a method capable of inexpensively modifying an ash extrusion device into the ash extrusion device of the present invention.

The ash extrusion apparatus of the present invention is disposed in the cooling tank, which has a cooling tank having an inlet formed of a cylindrical wall surface into which the incinerated ash is introduced and an outlet for discharging the incinerated ash cooled by stored water. A scraper that pushes the incineration ash toward the discharge port side while the tip is in contact with the entire width of the bottom surface of the cooling tank, and a drive arranged to drive the scraper with respect to the introduction port on the side opposite to the discharge port. And a bottom surface of the cooling tank, the bottom surface of the cooling tank has a first inclined surface that is inclined upward from immediately below the inlet to the opening end where the outlet is formed, and the same width as the first inclined surface. Is provided with a second inclined surface that is inclined upward from directly below the inlet toward the opposite side of the first inclined surface, and the stored water is above the lower end of the wall surface in the cooling tank. Further, the drive device is stored at a predetermined water level below the discharge port, and the drive device includes a drive shaft disposed above the second inclined surface, and the drive shaft and the drive shaft are rotated by the rotation of the drive shaft. An ash extruder for reciprocating the scraper forward and backward along the bottom surface by an arm connected to the scraper, the scraper and the arm reciprocating above the second inclined surface. Has a first pipe arranged from one end to the other end at a position not contacting with, the first pipe is introduced from the other end to the one end while the one end is arranged below the predetermined water level. A first jet port for jetting the generated gas between the second inclined surface and the scraper, and a water flow of the stored water generated by the gas jetted from the first jet port and a bubble formed by the gas. The return ash to be deposited on the side of the second inclined surface is agitated by.

A method for modifying an ash extrusion apparatus according to the present invention includes a cooling tank having an inlet formed of a cylindrical wall surface into which incinerated ash is introduced and an outlet for discharging the incinerated ash cooled by stored water, and the cooling tank. The scraper is disposed inside, the tip is in contact with the entire width of the bottom surface of the cooling tank and pushes out the incinerated ash to the discharge port side, and the scraper is disposed on the opposite side to the discharge port with respect to the introduction port. A bottom surface of the cooling tank, wherein the bottom surface of the cooling tank has a first inclined surface which is inclined upward from immediately below the introduction port toward an opening end where the discharge port is formed; and the first inclined surface. And a second sloped surface having the same width as that of the second sloped surface from immediately below the inlet port to the opposite side of the first sloped surface, and the stored water is in the cooling tank at the lower end of the wall surface Stored at a predetermined water level above and below the discharge port, the drive device includes a drive shaft disposed above the second inclined surface, and the drive shaft is rotated to drive the drive device. a method for retrofitting ash extrusion apparatus by the connected arm and the a axis scraper reciprocates forward and backward along the scraper on the bottom, above the second inclined surface, and, for the reciprocating operation Arranging the pipe at a position not contacting the scraper and the arm, and directing one end of the pipe, which is a gas ejection port, below the predetermined water level and between the second inclined surface and the scraper. And the step of arranging.

According to the ash extrusion apparatus of the present invention, the gas ejected in the stored water through the first pipe causes a water flow while forming bubbles, so that the returned ash drifting in the stored water can be stirred by the water flow, and the back side of the scraper and The return ash that has begun to be deposited on the second inclined surface can also be exfoliated with bubbles and stirred. The agitated return ash rides on the water flow generated by the reciprocating motion of the scraper and is discharged from the gap between the scraper and the lower end of the wall surface together with the stored water into the space immediately below the inlet. Therefore, it is possible to suppress the accumulation of return ash with a simple structure. Since it is possible to suppress the accumulation of return ash, it is not necessary to perform frequent cleaning.

Further, according to the ash extrusion device remodeling method of the present invention, with respect to a general ash extrusion device, the first pipe is arranged at a position where it does not contact the scraper and the arm, and the first ejection port provided at one end, It is completed by installing it between the second inclined surface and the scraper. In other words, it is possible to modify without changing the main parts such as the cooling tank, the scraper, and the driving device. Therefore, it is possible to realize an ash extrusion device that is inexpensive, simple, and can be remodeled in a short construction period, and that has a simple structure and that can suppress the accumulation of return ash.

It is sectional drawing of the ash extrusion apparatus which concerns on embodiment. It is sectional drawing which shows the state which the scraper of the ash extrusion apparatus shown in FIG. 1 moved backward. It is sectional drawing which shows the state which the scraper of the ash extrusion apparatus shown in FIG. 1 advanced. It is sectional drawing of the ash extrusion apparatus which concerns on a modification.

Hereinafter, an ash extrusion apparatus as an embodiment will be described with reference to the drawings, and a modification method thereof will be described. The embodiments described below are merely examples, and are not intended to exclude various modifications and application of techniques that are not explicitly described in the following embodiments. Each configuration of the present embodiment can be variously modified and implemented without departing from the spirit thereof. In addition, they can be selected or combined as needed.

As described in the background art, if the accumulated amount of "return ash" increases, it may interfere with the driving of the scraper and prevent the incineration ash from being pushed out from the discharge port. Therefore, the ash extrusion apparatus of the present embodiment, as will be described later, adopts a simple structure having a pipe for ejecting gas between the second inclined surface and the scraper in the second space, and the return ash Suppress deposition. Hereinafter, first, the overall configuration of the ash extrusion apparatus will be described, and then the configuration for suppressing the accumulation of return ash will be described in detail.

[1. overall structure]
As shown in FIG. 1, the ash extrusion apparatus 1 of the present embodiment is provided in an incinerator (for example, a stoker furnace), cools incinerator ash generated in the incinerator in a cooling tank 2, and then conveys the apparatus 11 (for example, a conveyor). To discharge. The ash extrusion device 1 has a cooling tank 2 in which stored water for cooling incinerated ash is stored, a scraper 3 and a drive device 4 arranged in the cooling tank 2. The cooling tank 2 is provided with an inlet 21 for introducing the incinerated ash and an outlet 22 for discharging the cooled incinerated ash.

The scraper 3 is a device that pushes the cooled incinerated ash toward the discharge port 22 side. The scraper 3 has an upper surface 3a facing upward, an extruding surface 3b facing the outlet 22 side, and both side surfaces (not shown), and has a box shape opened to the bottom surface 23 side of the cooling tank 2. The scraper 3 moves forward and backward along the bottom surface 23 while the lower end of the pushing surface 3b (that is, the tip 3c of the scraper 3) is in contact with the entire width of the bottom surface 23 of the cooling tank 2. The forward movement means that the scraper 3 moves in a direction of pushing the incinerated ash toward the discharge port 22 side (left direction in FIG. 1, forward direction Df), and backward movement means the reverse direction of forward movement (the scraper 3 is This means moving in the returning direction, the right direction in FIG. 1, and the backward direction Dr). Further, the entire width means the size in the width direction inside the cooling tank 2 (direction orthogonal to the paper surface of FIG. 1).

The drive device 4 is a device that drives the scraper 3, and is arranged on the opposite side of the inlet 21 to the outlet 22 (right side in FIG. 1). The drive device 4 includes a drive shaft 40 that is rotatable in two directions, and an arm 41 that connects the scraper 3 and the drive shaft 40. The drive device 4 causes the arm 41 to reciprocate the scraper 3 forward and backward as the drive shaft 40 rotates.

The inlet 21 of the cooling tank 2 is formed by a wall surface 20 having a tubular shape (for example, a rectangular tubular shape). The wall surface 20 is directly connected to an ash chute (not shown). The upper end of the ash chute is connected to an incinerator (not shown) (for example, a post combustion stage of a stoker furnace). The lower end of the wall surface 20 is located below a predetermined water level (broken line in FIG. 1) of the stored water in the cooling tank 2.

The bottom surface 23 of the cooling tank 2 has an upward slope from directly below the inlet 21 toward the outlet 22 (specifically, the opening end 23d that is the lower end in the vertical direction of the outlet 22). It has an inclined surface 23a and a second inclined surface 23b which is an upward inclination from directly below the inlet 21 toward the opposite side of the first inclined surface 23a. That is, the first inclined surface 23a is formed so as to be gradually higher as it goes in the forward direction Df, and the second inclined surface 23b is so formed as to be gradually higher as it goes in the backward direction Dr. In the cooling tank 2, the bottom surface portion immediately below the introduction port 21 (hereinafter referred to as the "lowermost surface 23c") is the lowest, and the bottom surface 23 has a curved surface convex downward. The cross-sectional shape of the cooling tank 2 is uniform in the width direction, and the width dimensions of the first inclined surface 23a, the lowermost surface 23c, and the second inclined surface 23b are all the same.

The drive shaft 40 of the drive device 4 is arranged above the second inclined surface 23b and at a position where it is not submerged in the stored water (that is, above a predetermined water level). Due to the water seal, the predetermined level of the stored water is set above the lower end of the wall surface 20 and below the discharge port 22. The stored water in the cooling tank 2 is controlled so as to be maintained at this predetermined water level. Specifically, the actual water level (actual water level) of the stored water is detected by the water level meter 9 arranged above the second inclined surface 23b of the cooling tank 2, and the control device 10 is detected by the water level meter 9. The water injection electromagnetic valve 72 of the water injection pipe 7 is controlled to open and close based on the actual water level.

The water injection pipe 7 is a pipe for increasing the stored water in the cooling tank 2, and is arranged above the second inclined surface 23b. The water injection electromagnetic valve 72 is provided in the middle of the water injection pipe 7. When the water injection electromagnetic valve 72 is opened, a liquid such as tap water to be stored in the cooling tank 2 flows inside the water injection pipe 7, and when the water injection electromagnetic valve 72 is closed, the flow of the liquid is stopped.

The cooling tank 2 is provided with a drain pipe 8 for draining the stored water when the water level of the stored water exceeds a predetermined water level. The opening at the upper end of the drainage pipe 8 is arranged slightly above and near the predetermined water level. As a result, excess stored water is automatically discharged without valve control. It should be noted that the stored water may be liquid water whose main component is water, and may be tap water or reused water (water that has been used in the plant and then treated), or may be mixed with hydrochloric acid or the like. It may be liquefied mixed water.

The control device 10 is an electronic control device included in the ash extrusion device 1, and is an electronic device equipped with a processor and a memory. The control device 10 not only controls the water injection electromagnetic valve 72 based on the actual water level measured by the water level gauge 9 as described above, but also opens the first electromagnetic valve 52 provided in the first pipe 5 described later. And also controls the closing of the valve. Further, the control device 10 controls the drive device 4.

The cooling tank 2 is roughly divided into three spaces in the forward and backward directions of the scraper 3. Specifically, the space immediately below the inlet 21 (above the lowermost surface 23c) (fire extinguishing humidification space 24), the space above the first inclined surface 23a (first space 25), and the second inclined surface. It is a space (second space 26) located above 23b.

The fire extinguishing humidification space 24 is a space where the incineration ash is introduced from the introduction port 21 and the incineration ash is extinguished and cooled while being humidified. The first space 25 is a space where the incineration ash pushed by the scraper 3 is continuously humidified and the incineration ash located above the predetermined water level is drained and dried to such an extent that it does not solidify. The second space 26 is a space in which the drive device 4, the water injection pipe 7, the drain pipe 8 and the water level gauge 9 are arranged. Further, in a state where the scraper 3 is most retracted (state indicated by a solid line in FIG. 1 ), most of the scraper 3 is located in the second space 26.

As shown in FIG. 1 in an enlarged manner, a gap G is provided between the upper surface 3a of the scraper 3 and the lower end portion 20b of the rear wall 20R to connect the fire extinguishing humidification space 24 and the second space 26. The gap G is secured even in the most advanced state of the scraper 3 (the state of the chain double-dashed line in FIG. 1). The gap G allows the scraper 3 to reciprocate without contacting the wall surface 20. Further, the stored water injected from the water injection pipe 7 can flow to the fire extinguishing humidification space 24 through the gap G.

The positional relationship between the upper surface 3a of the scraper 3 and the lower end portion 20b of the rear wall 20R is set so that the gap G gradually narrows as the scraper 3 moves forward and gradually widens as the scraper 3 moves backward. For example, when the gap in the most advanced state of the scraper 3 is G1 and the gap in the most retracted state of the scraper 3 is G2, the relationship of G1<G2 is established. The fire extinguishing humidification space 24 and the second space 26 substantially communicate with each other only through the gap G. The shape of the upper surface 3a of the scraper 3 may be a curved shape or a stepped shape for keeping the size of the gap G appropriately.

[2. Main composition]
When the scraper 3 reciprocates, a water flow is generated in the stored water, and the incinerated ash immersed in the stored water can enter the second space 26 through the gap G together with the stored water and serve as return ash accumulated in the second space 26. In the ash extrusion device 1, the method of preventing incineration ash from entering the second space 26 or cleaning the return ash accumulated on the second inclined surface 23b is not a method of returning to the second space 26. It is characterized in that ash is suppressed from being deposited and returned to the fire extinguishing humidification space 24 through the gap G.

Specifically, the ash extrusion device 1 is arranged above the second inclined surface 23b and at a position where it does not come into contact with the reciprocating scraper 3 and the arm 41 from one end 5a (lower end) to the other end 5b (upper end). It has a straight first pipe 5. One end 5a of the first pipe 5 is arranged below the predetermined water level, and the other end 5b is arranged above the predetermined water level. The scrapers 3 are provided over substantially the entire width of the cooling tank 2, while a plurality of arms 41 are arranged at intervals in the width direction, so that the first pipe 5 is located at the most retracted position of the scraper 3. Is also a position on the reverse side (right side in FIG. 1), and is arranged at a position that does not overlap with the arm 41 in the width direction.

The one end 5a of the first pipe 5 is provided with a first ejection port 50 that ejects the gas introduced from the other end 5b toward between the second inclined surface 23b and the scraper 3. In the ash extrusion device 1, a first compressor 51 is provided at the other end 5b of the first pipe 5. The gas ejected from the first pipe 5 is compressed air compressed by the first compressor 51. Note that instead of the compressed air, the exhaust gas of the incinerator may be ejected from the first ejection port 50. In this case, instead of or in addition to the first compressor 51, an introduction pipe for introducing the exhaust gas from the exhaust gas duct of the incinerator to the other end 5b of the first pipe 5 may be connected.

As shown in an enlarged manner in FIG. 1, the shape of the one end 5a of the first pipe 5 is an L shape having a corner portion that is bent and formed substantially in the horizontal direction. This corner is arranged in contact with the second inclined surface 23b. Accordingly, when the gas is ejected from the first ejection port 50, even if the one end 5a is pushed back toward the backward direction Dr by the pressure of the gas, the deformation or displacement of the first pipe 5 is prevented. Further, the first pipe 5 is prevented from being deformed or displaced by the physical pressure of the returned ash that is scraped up by the backward movement of the scraper 3.

In addition, in the first pipe 5, the first ejection port 50 is in a substantially horizontal direction, specifically, in a direction (eg, horizontal direction) orthogonal to the extending direction of the first pipe 5 (eg, vertical direction). Since it is opened, the gas from the first ejection port 50 is ejected in a direction away from the second inclined surface 23b. Therefore, the gas does not damage the second inclined surface 23b by scraping the second inclined surface 23b. Further, as described above, although the scraper 3 has the top surface 3a, it is open to the bottom surface 23 side of the cooling tank 2, in other words, it has a box-like shape without a bottom surface facing the top surface 3a, so the first ejection port 50 The gas from the inside does not damage the scraper 3 by scraping it.

Further, the water flow and bubbles generated by the gas ejected from the first ejection port 50 in the vicinity of the second inclined surface 23b proceed in the forward direction Df between the second inclined surface 23b and the scraper 3, and eventually the scraper 3 is extruded. The surface 3b or the upper surface 3a is repelled by slowing down and gently hitting, or swirls without hitting. Therefore, the return ash deposited in the second space 26 (eg, deposited on the second inclined surface 23b, deposited on the back side of the scraper 3, etc.) is peeled by the bubbles caused by the gas, and the peeled return is caused by the water flow. Not only the ash but also the returned ash to be deposited in the second space 26 is stirred.

In other words, the ash extrusion device 1 separates the return ash accumulated in the second space 26, and before the return ash in the second space 26 is accumulated on the second inclined surface 23b, the first ejection port 50. The return ash is stirred by the gas ejected from the ash, and the state (fluid state) in which the return ash is mixed in the stored water is maintained. Therefore, the ash extrusion device 1 easily discharges the returned ash from the second space 26. Further, in the ash extrusion device 1, the return ash is pushed up to the water surface from the back side of the scraper 3 and the vicinity of the second inclined surface 23b by the buoyancy of the bubbles and is dispersed. Therefore, the ash extrusion device 1 can more easily discharge the returned ash from the second space 26.

A plurality of the first pipes 5 are arranged in the width direction of the ash extrusion device 1 at a predetermined interval. Each first pipe 5 may be fixed and supported by, for example, one support member (not shown) extending in the width direction. The cross-sectional shape of each first pipe 5 is not particularly limited, and a circle, an ellipse, a polygon, or the like can be applied. A nozzle (not shown) may be attached to the first ejection port 50 to inject gas vigorously.

In the ash extrusion device 1, the control device 10 controls the ejection of gas from the first ejection port 50. Specifically, the control device 10 controls the opening and closing of the first electromagnetic valve 52 interposed in the middle of the first pipe 5. Then, the control device 10 ejects the gas from the first ejection port 50 at least when the scraper 3 moves backward.

Here, when the control device 10 opens the first electromagnetic valve 52 to eject gas while the scraper 3 is moving backward, and closes the first electromagnetic valve 52 when the scraper 3 is stopped or moving forward. Is illustrated.

As shown in FIG. 2, when the scraper 3 moves backward, the control device 10 causes the gas to be ejected from the first ejection port 50, so that the returned ash is stirred and the returned ash is scraped up by the scraper 3.
Further, as the scraper 3 moves backward, the position of the stored water containing the return ash in the second space 26 rises above the predetermined water level, and the position of the stored water in the fire extinguishing humidification space 24 falls below the predetermined water level. Therefore, the return ash is discharged from the second space 26 to the fire-extinguishing humidifying space 24 by riding on the water flow Wr flowing through the gap G that gradually widens as the scraper 3 moves backward.

Further, as the scraper 3 moves backward, the return ash scraped up by the scraper 3 in the second space 26 is agitated by the gas spouted from the first jet outlet 50, so the first pipe 5 formed by the scraped up return ash 5 It is possible to prevent damage to the first ejection port 50 and to prevent the ash from returning to the first ejection port 50 and blocking the first ejection port 50.
When the scraper 3 moves backward, stored water containing return ash may be discharged from the drain pipe 8.
Therefore, the accumulation of return ash in the second space 26 is suppressed.

On the other hand, as shown in FIG. 3, when the scraper 3 moves forward, the incineration ash in the fire extinguishing humidification space 24 rises, and in the fire extinguishing humidification space 24, the position of the stored water containing the return ash rises above a predetermined water level, In addition, in the second space 26, the position of the stored water containing the returned ash falls below the predetermined water level. However, since the gap G gradually narrows as the scraper 3 moves forward, it becomes difficult for the stored water to flow from the fire extinguishing humidification space 24 to the second space 26 through the gap G, and the amount of return ash due to the water flow Wf flowing through the gap G is reduced. It can be suppressed. This also suppresses the accumulation of return ash in the second space 26. The control device 10 may eject the gas from the first ejection port 50 even when the scraper 3 moves forward. In this case, since the stored water in the second space 26 is constantly disturbed, the accumulation of return ash is further suppressed.

[3. Method of remodeling ash extrusion equipment]
Here, a method for modifying a general ash extrusion apparatus to the ash extrusion apparatus 1 described above will be described. This modification method has two placement steps. The first arranging step is a step of arranging the first pipe 5 in a general ash extruding device having the cooling tank 2, the scraper 3, and the driving device 4 described above. In this step, the first pipe 5 is arranged above the second inclined surface 23b and at a position where it does not contact the reciprocating scraper 3 and the arm 41. In the present embodiment, the first pipe 5 is arranged at a position where the corner portion on the one end 5a side of the first pipe 5 contacts the second inclined surface 23b.

In the second arranging step, the first ejection port 50 provided at the one end 5a of the first pipe 5 is arranged below the predetermined water level and between the second inclined surface 23b and the scraper 3. It is a process. That is, the direction of the first ejection port 50 is set so that the gas from the first ejection port 50 is ejected between the second inclined surface 23b and the scraper 3. The first placement step and the second placement step may be performed simultaneously, or the former may be performed before the latter.

[4. effect]
(1) According to the ash extrusion device 1 of the present embodiment, the gas ejected in the stored water through the first pipe 5 causes bubbles and water flow, so that the returned ash drifting in the stored water can be stirred and accumulated. The return ash that has begun to be processed can be peeled off from the second inclined surface 23b and stirred. The stored water containing return ash rides on the water flow generated by the reciprocating motion of the scraper 3 and is easily discharged from the second space 26 to the fire extinguishing humidification space 24 through the gap G, and from the fire extinguishing humidification space 24 to the second space 26. Not easily discharged. Therefore, it is possible to suppress the accumulation of return ash with a simple structure. Moreover, since it is possible to suppress the accumulation of return ash, it is not necessary to perform frequent cleaning.

Even if a liquid (for example, a liquid such as tap water that is the same as the stored water) is jetted from the pipe instead of gas, the stirring effect of the returned ash can be expected. However, in the case of a liquid, the effect of exfoliating return ash due to bubbles cannot be expected.
Further, the liquid amount of the stored water in the cooling tank 2 is limited to the liquid amount stored up to a predetermined water level when the scraper 3 is not operated, and the liquid amount larger than that is discharged from the drain pipe 8. Therefore, if liquid is used instead of gas, the operating cost of the plant may increase. On the other hand, if the gas is ejected from the first ejection port 50, the operation amount of the plant can be reduced because the amount of the stored water is not affected.

Further, in the ash extrusion device 1 described above, the first pipe 5 is arranged at a position where it does not come into contact with the scraper 3 and the arm 41 as compared with the general ash extrusion device, and the first ejection port 50 provided at one end 5a is It is completed by installing it between the second inclined surface 23b and the scraper 3. That is, the modification can be performed without changing any of the main components such as the cooling tank 2, the scraper 3, and the driving device 4. Therefore, it is possible to realize the ash extrusion device 1 that is inexpensive, simple, and can be remodeled in a short construction period, and that has a simple structure and can suppress the accumulation of return ash.

(2) According to the ash extrusion device 1 described above, the compressed air having a strong stirring force is ejected from the first ejection port 50, so that the return ash can be further stirred, and the accumulation of the return ash can be further suppressed. Further, in order to eject the compressed air, the first compressor 51 may be provided, and since the cost of the air itself is not required, the inexpensive ash extrusion device 1 can be realized. Further, if the exhaust gas of the incinerator is ejected from the first ejection port 50, the temperature of the ejected gas is high, so that the peeling force is increased and the accumulation of return ash can be further suppressed. Further, in this case, since the ash undergoes a carbonation reaction by the carbon dioxide contained in the exhaust gas, the ash can be rendered harmless.

(3) In the ash extrusion device 1 described above, the control device 10 that controls the ejection of the gas from the first ejection port 50 is provided, and the gas is ejected at least when the scraper 3 moves backward. When the scraper 3 moves backward, a water flow (arrow Wr in FIG. 2) in which the stored water in the second space 26 flows to the fire-extinguishing humidification space 24 through the gap G is generated. It is possible to place the agitated return ash on the water flow Wr in the gap G and to discharge it. Therefore, it is possible to efficiently suppress the accumulation of return ash. Further, since the return ash scraped up by the scraper 3 is also agitated by the gas jetted from the first jet outlet 50, damage to the pipes such as the first pipe 5 due to the scraped return ash is prevented, and It is possible to prevent the first ejection port 50 from being blocked by the returning ash.

(4) In the ash extrusion device 1 described above, the gap G is gradually narrowed as the scraper 3 moves forward, and gradually widens as the scraper 3 moves backward, so that the upper surface 3a of the scraper 3 and the lower end 20b of the rear wall 20R. The positional relationship of is set. Therefore, while the scraper 3 is moving forward, it becomes difficult for the stored water to flow into the second space 26 through the gap G, and the amount of return ash due to the water flow Wf flowing through the gap G can be suppressed. On the other hand, since the gap G gradually expands during the reverse movement of the scraper 3, the return ash is easily discharged to the fire extinguishing humidification space 24 by riding on the water flow Wr flowing through the gap G. Therefore, the accumulation of return ash in the second space 26 can be suppressed.

(5) Further, according to the ash extrusion device 1 described above, when the corner of the one end 5a of the first pipe 5 is arranged in contact with the second inclined surface 23b, when gas is ejected from the first ejection port 50. It is possible to prevent the first pipe 5 from being deformed or displaced by the reaction force of. Further, it is possible to prevent the first pipe 5 from being deformed or displaced by the return ash scraped up by the scraper 3. Therefore, the gas can be accurately ejected between the second inclined surface 23b and the scraper 3. Therefore, since the gas is not directly ejected toward the second inclined surface 23b, the second inclined surface 23b is damaged by the gas (specifically, the second inclined surface 23b is scraped by the gas, and the thickness There is no risk of wear damage).

[5. Modification]
The ash extrusion device 1 described above is an example, and the configuration is not limited to the above. For example, like the ash extrusion apparatus 1 ′ shown in FIG. 4, a linear second pipe 6 may be provided in addition to the configuration of the ash extrusion apparatus 1. The second pipe 6 is arranged above the second inclined surface 23b and at a position where it does not contact the reciprocating scraper 3 and the arm 41 from one end 6a to the other end 6b. One end 6a of the second pipe 6 is arranged below the predetermined water level, and the other end 6b is arranged above the predetermined water level.

A second ejection port 60 for ejecting the gas introduced from the other end 6b is provided at one end 6a of the second pipe 6. The second ejection port 60 is connected to an opening formed in the lower end portion 20b of the wall surface of the wall surface 20 (that is, the rear wall 20R) located above the second inclined surface 23b.
The incineration ash accumulated in the gap G is separated by bubbles generated by the gas ejected from the second ejection port 60, and not only the incinerated ash separated by the gas is separated by the water flow of the gas but also the incineration is accumulated or is about to be accumulated in the gap G. The ash is washed away, and the clogging of the gap G due to the incinerated ash is suppressed.

Specifically, as shown in an enlarged view in FIG. 4, the shape of the one end 6a of the second pipe 6 is an L-shape having a corner portion that is bent substantially horizontally. The tip side (the second injection port 60 side) of this corner is inserted (fixed) into the opening from the second space 26 side.
By arranging the second pipe 6 in this way, gas is ejected from the second ejection port 60 in the vicinity of the gap G, and the water flow of the stored water generated by the gas and bubbles caused by the gas are on the upper surface 3 a of the scraper 3. The accumulated incineration ash rebounds, and the incineration ash staying around the gap G and the floating incineration ash (floating ash) are stirred.

More specifically, in the ash extrusion device 1 ′, the water flow of the stored water generated by the gas ejected from the second ejection port 60 and the bubbles of the gas first scrape off the incineration ash accumulated on the upper surface 3 a of the scraper 3. Then, the bubbles that flow in the vicinity of the rebounding gap G in the accumulated incineration ash peel off the incineration ash that has adhered to the periphery of the gap G, and the water flow that bounces in the accumulated incineration ash and flows into the vicinity of the gap G is The incinerated ash and the incinerated ash that is about to be deposited in the gap G are washed away.
Therefore, since clogging of the gap G due to incinerated ash is suppressed, the ash extruding apparatus 1 ′, as compared with the ash extruding apparatus 1, causes the stored water containing return ash from the second space 26 as the scraper 3 reciprocates. It can be discharged to the fire extinguishing humidified space 24 more reliably.

Further, the ash extruding device 1 ′ is provided on the water surface immediately below the inlet 21 by the water flow of the stored water generated by the gas jetted from the second jet port 60 and the bubbles caused by the gas, particularly by the above-mentioned bounced water flow and bubbles. Floating incineration ash (floating ash) can be stirred and humidified, and it is possible to prevent arching that solidifies the floating ash on the water surface.
The direction of the second ejection port 60 is set so that the gas does not directly eject toward the scraper 3. Therefore, since the bubbles and the water flow indirectly and gently contact the wall surface 20R and the scraper 3 in the vicinity of the gap G due to the rebound, it is possible to prevent the wall surface 20R and the scraper 3 from being damaged.

In the ash extrusion apparatus 1 ′ of this modification, the second compressor 61 is provided at the other end 6 b of the second pipe 6. The gas ejected from the second pipe 6 is compressed air compressed by the second compressor 61. Instead of the second compressor 61, a branch point is provided between the first compressor 51 and the first electromagnetic valve 52, and the other end 6b of the second pipe 6 is connected to this branch point, whereby the first compressor You may also use 51. Further, instead of the compressed air, the exhaust gas of the incinerator may be ejected from the second ejection port 60. In this case, instead of or in addition to the second compressor 61, an introduction pipe for introducing the exhaust gas from the exhaust gas duct of the incinerator to the other end 6b of the second pipe 6 may be connected.

A plurality of second pipes 6 are arranged in the width direction of the ash extruding device 1 ′ at a predetermined interval. Note that the first pipes 5 and the second pipes 6 do not have to have the same number, and the arranged intervals need not be the same. The sectional shape of the second pipe 6 is not particularly limited, and a circle, an ellipse, a polygon, or the like can be applied. A nozzle (not shown) may be attached to the second ejection port 60 to inject gas vigorously.

In the ash extrusion device 1 ′ of this modification, the control device 10 controls not only the ejection of gas from the first ejection port 50 but also the ejection of gas from the second ejection port 60. Specifically, the control device 10 controls the opening/closing of the second electromagnetic valve 62 interposed in the middle of the second pipe 6 to eject gas from the second ejection port 60 at least when the scraper 3 moves backward. Let For example, the control device 10 opens the second electromagnetic valve 62 to eject gas while the scraper 3 is moving backward, and closes the second electromagnetic valve 62 when the scraper 3 is stopped or moving forward. In this way, the control device 10 controls to eject the gas from the second ejection port 60 in synchronization with the ejection timing of the gas from the first ejection port 50, so that the accumulation of return ash can be more effectively performed. Can be suppressed.

In addition, in the ash extrusion apparatuses 1 and 1 ′ of the above-described embodiment and modification, the control device 10 may be configured to control not only the gas ejection timing but also the ejection amount.

1, 1'ash extrusion device 2 cooling tank 3 scraper 3a upper surface 3b extrusion surface 3c tip 4 drive device 5 first pipe 5a one end 5b other end 6 second pipe 6a one end 6b other end 7 water injection pipe 8 drainage pipe 9 water level gauge 10 Control device 11 Transport device 20 Wall surface 20b Lower end portion 20F Front wall 20R Rear wall 21 Inlet port 22 Discharge port 23 Bottom surface 23a First inclined surface 23b Second inclined surface 23c Bottom surface 23d Open end 24 Fire extinguishing humidification space 25 First space 26th Two spaces 40 Drive shaft 41 Arm 50 First jet 51 First compressor 52 First electromagnetic valve 60 Second jet 61 Second compressor 62 Second electromagnetic valve 72 Water injection electromagnetic valve Df Forward direction Dr Reverse direction Wf, Wr Water flow G , G1, G2 gap

Claims (6)

A cooling tank provided with an inlet formed of a cylindrical wall surface into which the incinerated ash is introduced and an outlet for discharging the incinerated ash cooled with stored water,
A scraper disposed in the cooling tank, the tip of which is in contact with the entire width of the bottom surface of the cooling tank and which pushes the incinerated ash toward the discharge port side,
A drive device that drives the scraper, the drive device being disposed on the side opposite to the discharge port with respect to the introduction port;
The bottom surface of the cooling tank has a first inclined surface that is inclined upward from immediately below the introduction port toward the opening end where the discharge port is formed, and has the same width as the first inclined surface and the introduction port. A second inclined surface that is inclined upward from directly below to the opposite side of the first inclined surface,
The stored water is stored in the cooling tank at a predetermined water level above the lower end of the wall surface and below the discharge port,
The drive device includes a drive shaft disposed above the second inclined surface, and the drive shaft rotates to move the scraper along the bottom surface by an arm connected to the drive shaft and the scraper. A forward and backward reciprocating ash extrusion device,
Above the second inclined surface, having a first pipe arranged from one end to the other end at a position not contacting the reciprocating scraper and the arm,
The one end of the first pipe is arranged below the predetermined water level, and the gas introduced from the other end is ejected to the one end between the second inclined surface and the scraper. Equipped with a first outlet
An ash extruding device for agitating return ash that is about to be deposited on the second inclined surface side by a flow of the stored water generated by the gas ejected from the first ejection port and bubbles by the gas. .. The ash extrusion apparatus according to claim 1, wherein the gas is compressed air or exhaust gas from an incinerator that generates the incineration ash. Further comprising a control device for controlling the ejection of the gas from the first ejection port,
The ash extrusion device according to claim 2, wherein the control device ejects the gas from the first ejection port at least when the scraper is moved backward. Above the second inclined surface, further having a second pipe arranged from one end to the other end at a position not contacting the reciprocating scraper and the arm,
The second pipe, the one end is arranged below the predetermined water level, the second end, at the one end, a second ejection port for ejecting the gas introduced from the other end,
The second ejection port is connected to an opening formed in a lower end portion of a wall surface of the wall surface located above the second inclined surface,
The stored water is caused to flow through the gap between the lower end of the wall surface and the upper surface of the scraper by the water flow of the stored water generated by the gas ejected from the second ejection port and the bubbles of the gas. The ash extrusion apparatus according to claim 3. The gap between the lower end of the wall surface and the upper surface of the scraper is gradually narrowed as the scraper moves forward, and gradually widened as the scraper moves backward. The ash extrusion apparatus of claim 1. A cooling tank provided with an inlet formed of a cylindrical wall surface into which the incinerated ash is introduced and an outlet for discharging the incinerated ash cooled with stored water,
A scraper disposed in the cooling tank, the tip of which is in contact with the entire width of the bottom surface of the cooling tank and which pushes the incinerated ash toward the discharge port side,
A drive device that drives the scraper, the drive device being disposed on the side opposite to the discharge port with respect to the introduction port;
The bottom surface of the cooling tank has a first inclined surface that is inclined upward from immediately below the introduction port toward the opening end where the discharge port is formed, and has the same width as the first inclined surface and the introduction port. A second inclined surface that is inclined upward from directly below to the opposite side of the first inclined surface,
The stored water is stored in the cooling tank at a predetermined water level above the lower end of the wall surface and below the discharge port,
The drive device includes a drive shaft disposed above the second inclined surface, and the drive shaft is rotated to move the scraper along the bottom surface by an arm connected to the drive shaft and the scraper. A method of remodeling an ash extrusion device for reciprocating forward and backward movements,
Above the second inclined surface, and, placing a piping at a position not in contact with said scraper and said arm to said reciprocating movement,
And a step of disposing one end of the pipe, which is a gas ejection port, below the predetermined water level and between the second inclined surface and the scraper.

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