阅读说明：本技术 灰推出装置 (Ash ejecting device ) 是由 牛尾雄贵 小田野贵宏 牛入大树 高桥克博 于 2019-02-08 设计创作，主要内容包括：灰推出装置(1)具有：灰导入口(2)、灰冷却槽(3)、刮板(4)、驱动刮板(4)的驱动部(5)、灰的排出口(6)、从灰冷却槽(3)向下倾斜所形成的第一连通部(7)、连接于第一连通部(7)的浮箱(8)、液位计(24)、向排除口供给液体的第一液体供给装置(27)、向灰冷却槽(3)供给液体的第二液体供给装置(34)以及控制第一液体供给装置(27)和第二液体供给装置(34)的控制装置(9),控制装置(9)在液面降低的情况下,供给液体直到规定的液位为止,在扭矩变为规定值以上的情况下,向排出口(6)的附近供给液体。(The ash pushing device (1) comprises: the ash cooling device comprises an ash inlet (2), an ash cooling tank (3), a scraper (4), a driving part (5) for driving the scraper (4), an ash outlet (6), a first communication part (7) formed by inclining downwards from the ash cooling tank (3), a floating box (8) connected to the first communication part (7), a liquid level meter (24), a first liquid supply device (27) for supplying liquid to the outlet, a second liquid supply device (34) for supplying liquid to the ash cooling tank (3), and a control device (9) for controlling the first liquid supply device (27) and the second liquid supply device (34), wherein the control device (9) supplies liquid to a specified liquid level when the liquid level is lowered, and supplies liquid to the vicinity of the outlet (6) when the torque is more than a specified value.)

1. An ash ejecting device is characterized in that,

the ash ejecting device comprises:

a dust inlet port for introducing dust incinerated in the garbage incinerator;

an ash cooling tank connected below the ash inlet port, having an inclined surface with a downstream side inclined upward, and filled with a liquid to a position above a lower end of the ash inlet port;

a scraper configured to push out the ash introduced into the ash cooling tank to the downstream side;

a driving section configured to drive the squeegee forward and backward;

a discharge port connected to the inclined surface and discharging the ash pushed out by the scraper;

a first communicating portion formed on the opposite side of the discharge port when viewed from the scraper, having one end connected to the ash cooling tank below the liquid surface of the liquid, and formed to be inclined downward from the ash cooling tank;

a buoyancy tank connected to the other end of the first communicating portion;

a liquid level meter for measuring the liquid level of the float tank;

a first liquid supply device that supplies the liquid to the vicinity of the discharge port;

a second liquid supply device for supplying the liquid to the ash cooling tank; and

a control device that controls the first liquid supply device and the second liquid supply device based on information of the liquid level meter and information related to torque of the drive portion,

the control device controls the second liquid supply device to supply the liquid up to a predetermined liquid level when the liquid level is lowered from the predetermined liquid level based on the information of the liquid level meter,

and controlling the first liquid supply device to supply the liquid to the vicinity of the discharge port when the torque becomes a predetermined value or more based on the information on the torque.

2. The ash push-out device according to claim 1,

the first liquid supply device includes:

a circulating liquid injection nozzle disposed above the discharge port and spreading the liquid toward a mangle region of the ash cooling tank; and

a circulation pump circulating the liquid of the ash cooling tank or the buoyancy tank to the circulation liquid injection nozzle.

3. The ash push-out device according to claim 2,

the squeegee has:

a scraper main body which pushes out the ash; and

and an auxiliary scraper connected to the scraper main body and guiding returned ash in the ash to the first communicating part.

4. The ash push-out device according to claim 3,

and an opening cover which can be opened/closed and is arranged above the buoyancy tank,

by opening the opening cover, the inside of the buoyancy tank can be cleaned.

5. The ash push-out device according to any one of claims 1 to 4,

the first communicating portion is a pipe that communicates the ash cooling tank with the pontoon, and the ash cooling tank and the pontoon are communicated only through the pipe.

6. The ash push-out device according to any one of claims 1 to 4,

and a second communicating portion formed to make a liquid surface of the ash cooling tank continuous with a liquid surface of the float tank.

Technical Field

The present invention relates to an ash ejecting apparatus.

The present application claims priority based on Japanese application No. 2018-022206 filed on 2/9/2018, the contents of which are incorporated herein by reference.

Background

In a waste incinerator, such as a grate furnace, main ash generated by burning waste in the grate is dropped from an ash chute (channel) into an ash push-out device, and cooled by a liquid (e.g., water) in the ash push-out device. The liquid also has a function of preventing air from intruding into the exhaust from the ash push-out device.

In the ash pushing device, when the scraper is driven to push the ash, the liquid is also discharged from the discharge port together with the ash. Accordingly, in order to maintain the liquid level in the apparatus at a predetermined level, it is necessary to supply a liquid such as water into the apparatus. Patent document 1 discloses an ash pushing device that includes a mechanism for circulating a liquid in the ash pushing device and that can reduce the amount of the newly supplied liquid.

Disclosure of Invention

Problems to be solved by the invention

Further, the ash pushing device disclosed in patent document 1 has the following problems: when the squeegee moves in the retreat direction, ash called return ash that has intruded into the driving portion side of the squeegee adversely affects the squeegee and the driving portion that drives the squeegee.

Further, in recent years, there are problems as follows: since the ash is finely pulverized due to progress of garbage classification, the ash near the discharge port (the position where the rolling of the ash is performed) is solidified, the ash carrying-out capability is lowered, and it becomes difficult to continuously operate the ash pushing-out device.

Patent document 2 describes a technique for removing ash near the discharge port with a cutter so as to enable continuous operation of the ash pushing device. However, the technique described in patent document 2 requires a special mechanism such as a separate cutter, which increases the cost.

The invention aims to provide an ash ejecting device which is low in cost and can easily continue the operation of the ash ejecting device.

Technical scheme

According to a first aspect of the present invention, an ash push-out device is characterized by comprising: a dust inlet port for introducing dust incinerated in the garbage incinerator; an ash cooling tank connected below the ash inlet port, having an inclined surface with a downstream side inclined upward, and filled with a liquid to a position above a lower end of the ash inlet port; a scraper configured to push out the ash introduced into the ash cooling tank to the downstream side; a driving section configured to drive the squeegee forward and backward; a discharge port connected to the inclined surface and discharging the ash pushed out by the scraper; a first communicating portion formed on the opposite side of the discharge port when viewed from the scraper, having one end connected to the ash cooling tank below the liquid surface of the liquid, and formed to be inclined downward from the ash cooling tank; a buoyancy tank connected to the other end of the first communicating portion; a liquid level meter for measuring the liquid level of the float tank; a first liquid supply device that supplies the liquid to the vicinity of the discharge port; a second liquid supply device for supplying the liquid to the ash cooling tank; and a control device that controls the first liquid supply device and the second liquid supply device based on information on the level meter and information on torque of the drive unit, wherein the control device controls the second liquid supply device to supply the liquid up to a predetermined liquid level when the liquid level decreases from the predetermined liquid level based on the information on the level meter, and controls the first liquid supply device to supply the liquid to a vicinity of the discharge port when the torque becomes a predetermined value or more based on the information on the torque.

According to this configuration, the returned ash accumulated in the ash cooling tank is discharged to the float chamber through the first communicating portion, and therefore, the adverse effect of the returned ash on the driving portion can be reduced.

When the torque of the driving unit becomes equal to or greater than a predetermined value, that is, when the ash is solidified and is in a state in which the ash is difficult to be discharged, the solidified ash is softened by supplying the liquid to the ash in the vicinity of the discharge port.

According to the above effects, the ash pushing device can be continuously operated easily at low cost without arranging a special mechanism such as a cutter separately.

According to a second aspect of the present invention, in the ash push-out device according to the first aspect, the first liquid supply device includes: a circulating liquid injection nozzle disposed above the discharge port and spreading the liquid toward a mangle region of the ash cooling tank; and a circulation pump circulating the liquid of the ash cooling tank or the float tank to the circulation liquid injection nozzle.

With this configuration, the ash can be effectively softened by spreading the liquid in the region of the rolling stock where the solidified ash is likely to accumulate.

According to a third aspect of the present invention, in the ash push-out device according to the second aspect, the scraper includes: a scraper main body which pushes out the ash; and an auxiliary scraper connected to the scraper main body and guiding returned ash in the ash to the first communicating portion.

With this configuration, return ash which adversely affects the scraper and the driving unit can be positively removed.

According to a fourth aspect of the present invention, the ash pushing apparatus according to the third aspect further comprises an openable/closable opening cover provided above the float chamber, and the inside of the float chamber can be cleaned by opening the opening cover.

With this configuration, the first communicating portion and the inside of the float chamber can be easily cleaned by opening the opening cover.

According to a fifth aspect of the present invention, in the ash push-out device according to any one of the first to fourth aspects, the first communicating portion is a pipe that communicates the ash cooling tank with the pontoon, and the ash cooling tank and the pontoon are communicated only by the pipe.

According to this configuration, the ash cooling tank and the float tank are communicated only by the first communication portion, and thus the liquid surface of the ash cooling tank and the liquid surface of the float tank are physically separated. Therefore, scum (floating ash) floating near the liquid surface of the ash cooling tank is hard to enter the float chamber. Therefore, the risk of the liquid level measurement being obstructed, such as contamination of the liquid level meter, is reduced.

According to a sixth aspect of the present invention, in any one of the ash push-out devices of the first to fourth aspects, a second communicating portion is further provided so as to connect a liquid surface of the ash cooling tank and a liquid surface of the float tank.

According to this configuration, the liquid surface of the ash cooling tank and the liquid surface of the float chamber are not physically separated from each other, and therefore, the scum floating on the liquid surface of the ash cooling tank enters the float chamber, but the scum can be safely and easily removed while the operation is continued by opening the open cover.

Effects of the invention

According to the present invention, the returned ash accumulated in the ash cooling tank is discharged to the float chamber through the first communicating portion, so that an adverse effect of the returned ash on the driving portion can be reduced.

When the torque of the driving unit becomes equal to or greater than a predetermined value, that is, when the ash is solidified and is in a state in which the ash is difficult to be discharged, the solidified ash is softened by supplying the liquid to the ash in the vicinity of the discharge port.

According to the above effects, the ash pushing device can be continuously operated easily at low cost without arranging a special mechanism such as a cutter separately.

Drawings

Fig. 1 is a sectional view of an ash push-out apparatus according to an embodiment of the present invention.

Fig. 2 is a view from direction II of fig. 1, and is a front view of the discharge port according to the embodiment of the present invention.

Fig. 3 is a sectional view of an ash cooling tank and a float chamber according to a modification of the embodiment of the present invention.

Fig. 4 is a sectional view of an ash cooling tank according to a modification of the embodiment of the present invention.

Detailed Description

Hereinafter, an ash pushing device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The ash push-out device is provided in a waste incinerator (for example, a grate furnace) that incinerates waste. Specifically, the ash pushing device is a device that cools ash generated by burning garbage in the garbage incinerator, and then discharges the cooled ash to a conveyor, for example.

As shown in fig. 1, the ash pushing device 1 of the present embodiment includes: an ash introduction port 2 for introducing ash a1, an ash cooling tank 3 connected to the ash introduction port 2, a scraper 4 for pushing out ash a2 introduced into the ash cooling tank 3, a drive unit 5 for driving the scraper 4 to advance and retreat, an outlet 6 for discharging ash a2 pushed out by the scraper 4, a communication pipe 7 (first communication unit) having one end 7a connected to the ash cooling tank 3, a float tank 8 connected to the other end 7b of the communication pipe 7, and a control device 9.

The ash introduction port 2 is a rectangular pipe connected to an ash chute of the garbage incinerator and extending in the vertical direction. The shape of the ash introduction port 2 is not limited thereto.

The ash cooling tank 3 is a tank connected below the ash introduction port 2, and cools the ash a2 introduced through the ash introduction port 2.

The ash cooling tank 3 is filled with a liquid (e.g., water). The height of the liquid surface W of the liquid can be appropriately set according to the shape of the ash cooling tank 3. The height of the liquid surface W in the present embodiment is set to be higher than the lower end 2a of the ash introduction port 2. The height of the liquid surface W is adjusted by the control device 9.

The bottom surface 10 of the ash cooling tank 3 is formed so as to be the lowest just below the ash introduction port 2.

The bottom surface 10 of the ash cooling trough 3 has a first inclined surface 11, and the first inclined surface 11 is formed to gradually rise in a first direction D1 from directly below the ash introduction port 2 toward the horizontal direction. Here, the first direction D1 is a direction toward the discharge direction (downstream side) of the ash a 2. That is, the first inclined surface 11 is formed to be inclined upward toward the discharge direction (downstream side) of the ashes a.

The discharge port 6 is a rectangular opening connected to the first inclined surface 11 and discharging the ash a2 pushed out by the scraper 4. The discharge port 6 is formed such that a lower end 6a of the discharge port 6 is higher than the liquid surface W of the liquid. Between the lower end 6a of the discharge port 6 and the liquid, a mangle area R is provided. The squeezing area R is an area located above the first inclined surface 11 and higher than the liquid surface W of the liquid. The ash A2a accumulated in the mangle area R is not immersed in the liquid.

A conveyor C is disposed below the discharge port 6. The conveyor C carries out the ash a2 discharged from the discharge port 6 to the next stage.

The bottom surface 10 of the ash cooling groove 3 has a second inclined surface 12, and the second inclined surface 12 is formed to gradually rise from directly below the ash introduction port 2 toward a second direction D2 opposite to the first direction D1. The mechanism for pushing out the ash a2, such as the scraper 4 and the driving unit 5, is disposed above the second inclined surface 12.

The scraper 4 is disposed on the second direction D2 side with respect to the ash introduction port 2, and pushes out the ash a2 accumulated in the ash cooling tank 3. The squeegee 4 is connected to a first center axis S1 that is orthogonal to the first direction D1 and extends in the horizontal direction. The blade 4 has: a rotating arm 14 that can rotate about a first center axis S1; and a blade body 15 connected to an end of the pivot arm 14 opposite to the first center axis S1 so as to be pivotable about a second center axis S2.

The blade main body 15 is disposed so that the tip end thereof contacts the bottom surface 10 (horizontal direction perpendicular to the first direction D1, see fig. 2) of the ash cooling groove 3 across the width direction WD. The rotating arm 14 rotates in the first rotating direction R1, whereby the scraper main body 15 pushes out the ash a2 toward the downstream side. The pivot arm 14 pivots in a second pivot direction R2 opposite to the first pivot direction R1, whereby the distal end of the squeegee body 15 moves in the second direction D2 in a retreated manner.

As shown by the solid line in fig. 1, in the most retracted state of the scraper main body 15, the tip of the scraper main body 15 is positioned directly below the ash introduction port 2. As shown by the two-dot chain line in fig. 1, in the most advanced state of the scraper main body 15, the tip end of the scraper main body 15 is located on the downstream side from the ash introduction port 2.

The squeegee 4 has an auxiliary squeegee 16 swingably connected to the squeegee main body 15. The auxiliary squeegee 16 is connected to the squeegee main body 15 via the third center shaft S3. The third center axis S3 is disposed near the second center axis S2 of the squeegee body 15. The tip of the auxiliary scraper 16 contacts the second inclined surface 12 of the bottom surface 10 of the ash cooling trough 3 across the width direction WD.

The auxiliary squeegee 16 moves on the bottom surface 10 along with the movement of the squeegee body 15.

The driving unit 5 is, for example, an electric motor. The driving unit 5 rotates the first center axis S1 in the first rotational direction R1 or in the second rotational direction R2. The drive unit 5 is electrically connected to the control device 9. The control device 9 inputs information on the torque of the driving unit 5. The torque of the driving portion 5 increases when the load of the blade 4 driven by the driving portion 5 becomes high.

As for communicating pipe 7, one end 7a as a connecting portion with ash cooling tank 3 is connected to second inclined surface 12 of bottom surface 10 of ash cooling tank 3, and the other end 7b is formed as a tubular member lower than one end 7 a. Communication pipe 7 is disposed on the second direction D2 side with respect to blade 4. That is, communication pipe 7 is disposed on the opposite side of discharge port 6 as viewed from blade 4 as the center. One end 7a of communication pipe 7 is connected to a position below liquid level W.

The float tank 8 is a container connected to the other end 7b of the communication pipe 7. The float tank 8 is disposed such that a liquid surface W of the liquid is formed in an internal space of the float tank 8. The upper wall 8a of the float 8 is formed higher than the liquid surface W. The liquid moves between the ash cooling tank 3 and the float tank 8 only via the communicating pipe 7. The height of the liquid surface W of the ash cooling tank 3 is the same as the height of the liquid surface W of the float chamber 8.

A float tank discharge pipe 17 for discharging the liquid in the float tank 8 is provided at the lower portion of the float tank 8. A float valve 18 is provided in the float discharge pipe 17. The float valve 18 is a valve that opens/closes the float discharge pipe 17.

An opening cover 19 that can be opened/closed is provided on the upper wall 8a of the float chamber 8. By opening the opening cover 19, the operator can reach the inside of the float chamber 8.

An overflow liquid receiving hopper 21 is provided inside the float tank 8. The overflow receiving funnel 21 is formed to correspond to the height of the set liquid level W. That is, when the height of the liquid surface W becomes higher than the set height, the liquid flows into the overflow receiving funnel 21 and the liquid is discharged into the settling tank 23, so that the height of the liquid surface W does not become higher than the set height.

A drain pipe 22 is connected to the overflow receiving funnel 21, and a settling tank 23 is provided at the lower end of the drain pipe 22. The liquid flowing into the overflow liquid receiving funnel 21 is stored in the settling tank 23.

The float tank 8 is provided with a liquid level meter 24 for measuring the height of the liquid level W in the float tank 8. The level gauge 24 is electrically connected to the control device 9. The height of the liquid surface W measured by the liquid level meter 24 is sent to the control device 9.

A settling tank discharge pipe 25 for discharging the sediment in the settling tank 23 is provided at the lower part of the settling tank 23. A settling tank valve 26 is provided in the settling tank discharge pipe 25. The settling tank valve 26 is a valve that opens/closes the settling tank discharge pipe 25. By opening the settling tank valve 26, the sediment accumulated in the settling tank 23 can be discharged.

The ash push-out device 1 has a first liquid supply device 27 that supplies liquid to the vicinity of the discharge port 6. Specifically, the first liquid supply device 27 distributes the liquid to the ash A2a deposited in the mangle area R of the ash cooling bath 3. The first liquid supply device 27 includes: a circulating liquid injection nozzle 28 disposed above the discharge port 6; a circulating liquid line 29 for connecting the circulating liquid injection nozzle 28 to the precipitation tank 23; and a circulation pump 30 provided in the circulation liquid line 29 and circulating the liquid in the precipitation tank 23 to the circulation liquid injection nozzle 28. Since the liquid stored in the settling tank 23 is the liquid flowing into the overflow receiving funnel 21, the first liquid supply device 27 substantially circulates the liquid inside the float tank 8 to the circulating liquid injection nozzle 28. The first liquid supply device 27 can be supplied with liquid from another supply source.

As shown in fig. 2, the circulating liquid injection nozzle 28 includes: a body portion 31 extending in the width direction; and a plurality of nozzle portions 32 formed in the body portion 31 and spreading the liquid WS. The nozzle portion 32 of the circulating liquid injection nozzle 28 is directed to spread the liquid toward the mangle area R.

The circulation pump 30 is electrically connected to the control device 9. The control device 9 can control the circulation pump 30. When the circulation pump 30 is operated by the control device 9, the liquid in the settling tank 23 is supplied to the circulation liquid injection nozzle 28 and is dispersed to the ash A2a accumulated in the mangle area R.

The ash pushing-out device 1 has a second liquid supply device 34 that supplies liquid to the ash cooling tank 3. The second liquid supply device 34 includes: a liquid tank 35 for storing liquid (e.g., water); an injection nozzle 36 for injecting the liquid in the liquid tank 35 into the ash cooling tank 3; and an electric valve 37 provided in the injection nozzle 36. The electric valve 37 is electrically connected to the control device 9. The control device 9 can control the electric valve 37. By controlling the electric valve 37 by the control device 9, the liquid in the liquid tank 35 is injected into the ash cooling tank 3 through the injection nozzle 36.

The control device 9 includes: a liquid level control unit 92 for controlling the second liquid supply device 34 to supply the liquid to the ash cooling tank 3 based on the height of the liquid level W measured by the liquid level meter 24; and a liquid spreading portion 91 that controls the first liquid supply device 27 to spread the liquid to the ash A2a accumulated in the mangle area R based on the torque of the driving portion 5.

When the liquid level gauge 24 detects that the height of the liquid level W has decreased from a predetermined liquid level, the liquid level control unit 92 performs control to open the electric valve 37 of the second liquid supply device 34, that is, control to open the valve.

When the information on the torque is received from the driving unit 5 and the torque of the driving unit 5 becomes equal to or greater than the predetermined value, the liquid spraying unit 91 performs control to operate the circulation pump 30.

Next, the operation of the second liquid supply device 34 of the ash pushing device 1 of the present embodiment will be described.

Ash a2 charged into ash cooling tank 3 through ash inlet 2 is liquid-cooled. The ash a2 cooled in the ash cooling tank 3 is pushed out in the first direction D1 by the scraper 4 and conveyed to the conveyor C. At this time, the liquid inside the ash cooling tank 3 is also discharged following the ash a 2.

The liquid level control unit 92 of the controller 9 controls the second liquid supply device 34 based on the height of the liquid level W measured by the liquid level meter 24 to control the height of the liquid level W. Specifically, when the liquid is discharged from the discharge port 6 or the float tank discharge pipe 17 and the height of the liquid surface W is lowered from a predetermined liquid level, the control device 9 controls the motor-operated valve 37 of the second liquid supply device 34 to open the valve, and the liquid in the liquid tank 35 is injected into the ash cooling tank 3 through the injection nozzle 36. Thereafter, when the height of the liquid surface W rises to a predetermined liquid level, the control device 9 controls the motor-operated valve 37 to close the valve, and stops the injection of the liquid from the liquid tank 35.

Next, the operation of the communication pipe 7 and the auxiliary scraper 16 of the ash pushing device 1 of the present embodiment will be described.

When the scraper 4 retreats, the returned ash a3 enters the second inclined surface 12 on the second direction D2 side with respect to the scraper 4. The returned ash a3 is ash that enters the second direction D2 side of the scraper 4, such as from a gap between the scraper 4 and the bottom surface 10, when the scraper 4 retreats.

Since the connection pipe 7 is formed in the ash cooling tank 3 of the ash pushing device 1 of the present embodiment, the returned ash a3 is introduced into the float tank 8 through the connection pipe 7. The returned ash a3 accumulated in the float 8 can be appropriately discharged through the float discharge pipe 17 by opening the float valve 18.

Further, by the movement of the scraper body 15 toward the first direction R1, the auxiliary scraper 16 thereby pushes back the returned ash A3 toward the first direction D1 side. The auxiliary scraper 16 guides the returned ash A3 to the communication pipe 7 by the retreat movement of the scraper main body 15 in the second direction R2. One end 7a of communication pipe 7 is inclined upward from the other end 7b, and therefore return ash a3 that has reached communication pipe 7 is induced to move toward buoyancy tank 8.

Next, the operation of the first liquid supply device 27 of the ash pushing device 1 of the present embodiment will be described.

When the torque of the driving unit 5 becomes larger than the predetermined value, the control device 9 operates the circulation pump 30 of the first liquid supply device 27. Thereby, the liquid WS is dispersed from the circulating liquid injection nozzle 28, and the ash A2a deposited in the rolling area R is softened. Thereafter, when the torque of the driving unit 5 becomes smaller than the predetermined value, the control device 9 stops the circulation pump 30 of the first liquid supply device 27, and as a result, the dispersion of the liquid WS from the circulation liquid injection nozzle 28 is stopped.

According to the above embodiment, the returned ash A3 deposited on the second inclined surface 12 is discharged to the float chamber 8 through the communication pipe 7, and therefore, the adverse effect on the scraper 4 and the driving unit 5 due to the returned ash A3 can be suppressed. Therefore, the scraper 4 can be smoothly operated without being hindered by the returned ash a 3.

Further, by providing the circulating liquid injection nozzle 28 toward the mangle region R (the vicinity of the discharge port 6) where the solidified ash A2a is likely to be accumulated, the solidified ash A2a can be softened, and the reduction in the ash carrying-out capability can be suppressed. In particular, by spreading the liquid in the squeezing area R where the ash A2a is easily solidified, the ash can be efficiently carried out.

As described above, the stability of the continuous operation of the ash pushing device 1 can be improved.

Further, since the opening cover 19 is provided on the upper wall 8a of the float 8, the amount of the return ash a3 accumulated in the float 8 can be checked. When the returned ash A3 is present in a certain amount, the float valve 18 can be opened to discharge the returned ash A3 while the operation is continued.

At this time, the liquid surface W is lowered, but the controller 9 controls the second liquid supply device 34, thereby raising and holding the height of the liquid surface W to a predetermined liquid level.

Further, by opening cover 19 of float tank 8, communication pipe 7 and the inside of float tank 8 can be easily cleaned.

Further, the ash cooling tank 3 and the float tank 8 are communicated only by the communication pipe 7, whereby the liquid surface W of the ash cooling tank 3 and the liquid surface W of the float tank 8 are physically separated. Therefore, the scum (floating ash) floating near the liquid surface W of the ash cooling tank 3 is less likely to enter the float chamber 8. Therefore, the risk of the liquid level meter 24 being clogged or the like obstructing the liquid level measurement is reduced.

[ modified examples ]

Hereinafter, modifications of the embodiments of the present invention will be described in detail with reference to the drawings. Note that, in the modified example, differences from the above-described embodiment will be mainly described, and descriptions of the same portions will be omitted.

As shown in fig. 3, the ash cooling tank 3 and the float tank 8 of the modification communicate with each other through an opening 40 (second communication portion) formed in a partition wall 39 that partitions the ash cooling tank 3 and the float tank 8, in addition to the communication pipe 7. The opening 40 is formed so that the liquid surface W of the ash cooling tank 3 is continuous with the liquid surface W of the float 8. The opening 40 is formed such that: the lower end 40a of the opening 40 is lower than the liquid surface W, and the upper end 40b is higher than the liquid surface W.

The ash cooling tank 3 and the float chamber 8 of the modified example communicate with each other not only through the communication pipe 7 but also through the opening 40 formed near the liquid surface W.

According to this modification, the liquid surface W of the ash cooling tank 3 and the liquid surface W of the float chamber 8 are not physically separated from each other, and therefore, the scum floating on the liquid surface W of the ash cooling tank 3 enters the float chamber 8, but the scum can be safely and easily removed while the operation is continued by opening the open lid 19.

While the embodiments and modifications of the present invention have been described in detail with reference to the drawings, the specific configurations are not limited to the embodiments and modifications, and design changes and the like are included without departing from the scope of the present invention.

The first liquid supply device 27 of the present embodiment is configured to circulate the liquid in the settling tank 23 (float tank 8) to the circulating liquid injection nozzle 28, but is not limited thereto. For example, as shown in fig. 4, a first liquid supply device 27B may be used which circulates the liquid accumulated in the ash cooling tank 3 to the circulating liquid injection nozzle 28. In this case, the first liquid supply device 27B is controlled by the control device 9, as in the case of the first liquid supply device 27.

Industrial applicability of the invention

According to the present invention, the returned ash accumulated in the ash cooling tank is discharged to the float chamber through the first communicating portion, and the adverse effect of the returned ash on the driving portion can be reduced.

When the torque of the driving unit becomes equal to or greater than a predetermined value, that is, when the ash is solidified and is in a state in which the ash is difficult to be discharged, the solidified ash is softened by supplying the liquid to the ash in the vicinity of the discharge port.

According to the above effects, the ash pushing device can be continuously operated easily at low cost without arranging a special mechanism such as a cutter separately.

Description of the symbols

1 Ash ejecting device

2 ash introducing port

3 Ash cooling tank

4 scraping board

5 drive part

6 discharge port

7 communicating pipe (first communicating part)

8 buoyancy tank

8a upper wall

9 control device

10 bottom surface

11 first inclined plane (inclined plane)

12 second inclined plane

14 rotating arm

15 scraper blade body

16 auxiliary scraper

17 discharging pipe of buoyancy tank

18 float chamber valve

19 opening cover

21 overflow liquid receiving hopper

22 Drain pipe

23 settling tank

24 liquid level meter

25 discharge pipe of settling tank

26 settling tank valve

27. 27B first liquid supply device

28 circulation liquid injection nozzle

29 circulating liquid pipeline

30 circulating pump

31 main body part

32 nozzle part

34 second liquid supply device

35 liquid tank

36 injection nozzle

37 electric valve

39 partition wall

40 opening (second connecting part)

91 liquid spreading part

92 liquid level control part

A ash

C conveyer

R mangle area

S1 first center shaft

S2 second center shaft

S3 third center shaft

W liquid level