KR20170077149A - Slag discharge apparatus and slag discharge method - Google Patents

Abstract

The slag crusher 20 is provided in a combustor of a gasifier 10 for gasifying a carbon-containing fuel, and discharges the slag generated in the combustor 10 from the gasifier 10. The slag crusher 20 includes a screen 22 which is provided so as to intersect the falling direction of the slag and has a plurality of openings 30 and allows slags smaller than the diameter of the openings 30 to pass therethrough, A spreader 24 for moving the upper surface of the screen 22 to crush the slag deposited on the upper surface of the screen 22 and a nozzle 26 for spraying the high pressure water against the slag deposited on the screen 22. As a result, the slag deposited on the upper surface of the screen 22 becomes easier to pass through the opening 30 of the screen 22. [

Description

Technical Field [0001] The present invention relates to a slag discharging device and a slag discharging method,

The present invention relates to a slag discharging device and a slag discharging method.

In the lower part of a gasification furnace for gasifying a carbon-containing fuel such as coal, there is provided an ash hopper for collecting slag (melted slag) generated in the combustor and falling down (Patent Documents 1 and 2).

The ash hopper is provided with a slag crusher having a screen and a spreader. The slag falling from the combuster is rapidly cooled with water and solidified, and falls on the upper surface of the screen of the slag crusher.

This screen is provided so as to intersect with the falling direction of the slag and has a plurality of openings. Thereby, the screen is passed through the slag smaller than the diameter of the opening portion, and falls down to the lower portion of the ash hopper.

On the other hand, on the upper surface of the screen, a slag larger than the diameter of the opening portion and a slag mass of the slag smaller than the diameter of the opening portion are deposited. The slag agglomerates are bonded by bridging by friction force or powder pressure in the particle layer of the slag.

Therefore, the spreader provided on the upper surface of the screen moves on the upper surface of the screen by, for example, a hydraulic cylinder, and is crushed by passing the slag through the screen.

The slag falling and deposited from the opening of the screen to the bottom of the ash hopper is discharged from the gasifier through the lock hopper to the outside of the system.

Japanese Patent Application Laid-Open No. 7-247484 Japanese Patent Application Laid-Open No. 9-38510

However, even when the spreader is operated, the deposited slag is not crushed but scraped in the operating direction of the slag crusher, and may not pass through the screen.

Then, the amount of slag deposited on the upper surface of the screen increases, so that the slag is not discharged from the gasifier and the slag is filled in the ash hopper. In this case, continuous operation of the gasification furnace becomes difficult, and the gasification furnace is stopped.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a slag discharging device and a slag discharging method which can make slag deposited on an upper surface of a screen easier to pass through an opening of a screen.

In order to solve the above problems, the slag discharging device and the slag discharging method of the present invention employ the following means.

The slag discharging device according to the first aspect of the present invention is a slag discharging device provided in a gasifier of a gasification furnace for gasifying a carbon containing fuel and discharging the slag generated in the reclaimer from the gasifier, A screen which is provided so as to cross the falling direction of the slag and which has a plurality of openings and through which the slag is smaller than the diameter of the opening; and an upper surface of the screen, wherein the slag deposited on the upper surface of the screen is crushed And a water flow forming means for forming a water flow by flowing a liquid to the slag deposited on the screen.

The slag discharging device according to the present construction is provided in a gasifier furnace for gasifying a carbon-containing fuel, and the slag generated in the combustor and discharged from the gasifier is discharged.

The slag discharge device is provided with a screen provided so as to cross the slag falling direction and having a plurality of openings. The slag smaller than the diameter of the opening of the screen falls through the opening. On the other hand, the slag deposited on the upper surface of the screen without passing through the opening is crushed by crushing means moving on the upper surface of the screen.

Here, the slag deposited on the upper surface of the screen includes slag agglomerated with slag smaller than the diameter of the opening by bridging by frictional force or bulk pressure.

In order to remove the deposited slag, a flow of water is formed by flowing a liquid from the water flow forming means to the slag deposited on the upper surface of the screen. The pressurized liquid is ejected to the particles of the slag combined by the crosslinking, whereby the bond due to the crosslinking is broken. Thereby, the slag gently fluidizes from the stationary state. The liquid ejected to the slag is, for example, water.

Then, the slag, which is easy to flow, is flowed by the liquid from the water flow forming means. Thereby, the slag falls with the liquid from the opening of the screen without moving the crushing means. Further, the slag can easily fall from the opening even by moving the crushing means.

As described above, this configuration can make the slag deposited on the upper surface of the screen easier to pass through the opening of the screen.

In the first aspect, it is preferable that the water flow forming means is provided on the side wall of the screen provided so as to be parallel to the operating direction of the crushing means.

According to this configuration, the pressurized liquid can be simply and uniformly ejected to the deposited slag.

In the first aspect, it is preferable that the water flow forming means is provided in the crushing means.

According to this structure, since the liquid pressurized more reliably to the slag to be crushed by the crushing means, the coupling due to the crosslinking of the deposited slag is cut off, and the slag easily passes through the screen.

In the first aspect, it is preferable that the crushing means has an inclined surface inclined forward with respect to the crushing direction of the slag.

According to this structure, since the force is applied downward to the deposited slag, the bond due to the crosslinking of the deposited slag is cut off, and the slag easily passes through the screen.

In the first aspect, it is preferable that the water flow forming means is provided on the inclined surface to eject the liquid in the direction of the screen.

According to this structure, since the force applied to the slag to be crushed by the crushing means is also applied downward by the liquid to be ejected, the deposited slag can be more reliably crushed.

In the first aspect, it is preferable that the water flow forming means is provided on the screen.

According to this structure, deposition of slag on the upper surface of the screen can be suppressed, and the pressurized liquid can be ejected simply and uniformly on the deposited slag.

In the first aspect, it is preferable that the water flow forming means ejects a gas instead of the liquid.

In the first aspect, it is preferable to provide a guide for limiting the moving direction of the crushing means.

According to this configuration, it is possible to stabilize the movement of the shredding means, for example, to prevent the shredding means from floating.

In the first aspect, a plurality of the crushing means are adjacently provided on the upper surface of the screen, and the screen is divided by the partitioning means between the adjacent crushing means, It is preferable to provide the water flow forming means.

According to this configuration, since the slag on the screen is flowed by the water flow formed by the water flow forming means, it is possible to prevent the slag from remaining on the screen.

In the first aspect, the water flow from the water flow forming means provided below the region corresponding to the predetermined crushing means corresponds to the adjacent other crushing means before the predetermined crushing means is operated And the slag is moved to the region where the slag is formed.

According to this configuration, a relatively small slag is caused to flow into the region corresponding to the other crushing means by the water flow from the water flow forming means, and drops from the screen there. And, the working crushing means crushes the relatively large slag not flowed by the water flow, so that the large slag can be prevented from remaining on the screen.

In the first aspect, it is preferable that the lower end portion of the crushing means is formed so as to be in surface contact with the surface opposed to the crushing means in the width direction.

According to this configuration, since the lower end portion of the crushing means is in surface contact with the surface opposed to the crushing means when moved, the clearance between the lower end portion of the crushing means and the opposed surface thereof is eliminated. Therefore, this configuration can more reliably crush the slag on the screen, and therefore, it is possible to prevent the large slag from remaining on the screen.

According to this configuration, in the state where water is supplied to the upper surface of the screen, gas is blown from the upper surface of the screen, and the bond due to the bridging of the slag is cut by the rising of the bubbles. Thereby, since the slag is fluidized, the slag deposited on the upper surface of the screen becomes easier to pass through the opening of the screen.

A slag discharging method according to a second aspect of the present invention is a slag discharging method provided in a gasification furnace of a gasification furnace for gasifying a carbon containing fuel and comprising a slag discharging device for discharging the slag, A first step of flowing water from the water flow forming means to the slag deposited on the upper surface of the screen provided so as to cross the falling direction of the slag and having a plurality of openings to form a water flow; The crushing means for crushing the slag deposited on the upper surface of the screen includes a second step of moving the upper surface of the screen.

According to the present invention, it is possible to make the slag deposited on the upper surface of the screen easier to pass through the opening of the screen.

1 is a longitudinal sectional view of a gasification furnace according to a first embodiment of the present invention.
2 is a longitudinal sectional view of a slag crusher according to a first embodiment of the present invention.
3 is a front view of the spreader according to the first embodiment of the present invention.
4 is a longitudinal sectional view of a spreader according to a second embodiment of the present invention.
5 is a longitudinal sectional view of the spreader according to the second embodiment of the present invention when viewed from the front.
6 is a longitudinal sectional view of a screen according to a third embodiment of the present invention.
7 is a longitudinal sectional view of a screen according to a modification of the third embodiment of the present invention.
8 is a longitudinal sectional view of a screen according to a fourth embodiment of the present invention.
9 is a longitudinal sectional view of a screen according to a modification of the fourth embodiment of the present invention.
10 is a top view of a slag crusher according to a fifth embodiment of the present invention.
11 is a longitudinal sectional view of a screen and side walls according to a fifth embodiment of the present invention.
12 is a longitudinal sectional view for explaining the spreading of the spreader.
13 is a top view of a slag crusher according to a sixth embodiment of the present invention.
Fig. 14 is a longitudinal sectional view of a slag crusher according to a sixth embodiment of the present invention when viewed from the side; Fig.
15 is a longitudinal sectional view of the slag crusher according to the sixth embodiment of the present invention when viewed from the front;
16 is a longitudinal sectional view showing the residual state of the slag in terms of the side view.
17 is a longitudinal sectional view of a slag crusher according to a seventh embodiment of the present invention when viewed from the side;

Hereinafter, one embodiment of the slag discharging device and the slag discharging method according to the present invention will be described with reference to the drawings.

[First Embodiment]

Hereinafter, a first embodiment of the present invention will be described.

1 is a longitudinal sectional view of a gasification furnace 10 according to the first embodiment.

The carbon-containing fuel to be applied to the gasification furnace 10 according to the first embodiment is not limited to the heavy fuel such as coal, petroleum coke, coal coke, asphalt, pitch, oil shale, . In each of the following embodiments, a description will be given of a case where the carbon-containing fuel gasified is coal.

In the gasification furnace 10, in the compressor 12 having a high-temperature atmosphere of 1500 to 1800 DEG C or higher, which is higher than the refractory point, the coal powder supplied from a coal supply facility (not shown) (Not shown) and reacted with the oxidizing agent. As a result, in the combustor 12, the pulverized coal is burned at a high temperature, so that coal gas, which is a combustible gas, is generated, and the slag 14 in which the ash in the pulverized coal is melted is produced.

The high-temperature coal gas obtained by the high-temperature combustion of the combuster 12 flows into the reductor 16 provided at the upper end of the combuster 12. The pulverized coal and charcoal are supplied to the reductor 16, and the supplied pulverized coal and charcoal are further gasified to generate a combustible gas by the coal gas. The combister 12 according to the first embodiment is of the classifying common type (jet flow type), but is not limited thereto and may be a fluid common type or a fixed common type.

At the lower portion of the gasification furnace 10, there is provided an ash hopper 18 for collecting the slag 14 generated in the combuster 12 and falling down.

The ash hopper 18 is provided with a slag crusher 20 for crushing the slag 14 and discharging it from the gasification furnace 10. The lower portion of the gasification furnace 10 is filled with water up to the region including the slag crusher 20.

2 is a longitudinal sectional view showing the construction of the slag crusher 20 according to the first embodiment.

The slag crusher 20 includes a screen 22 (also referred to as a crusher mesh), a spreader 24, and a nozzle 26.

The slag 14 falling from the combbuster 12 is rapidly cooled and solidified by water (hereinafter referred to as "ash hopper water") ejected from the ash hopper water supply pipe 28, Falls on the upper surface of the screen 22.

The screen 22 is provided so as to cross the falling direction of the slag 14 and has a plurality of openings 30 and allows the slag 14 smaller than the diameter of the openings 30 to pass therethrough. The screen 22 is, for example, a plate-shaped member having an opening 30. However, the shape of the opening 30 is not particularly limited, and may be, for example, circular or polygonal.

The slag 14, which has passed through the opening 30, falls to the bottom of the ash hopper 18 together with the ash hopper number. 1, a lock hopper 34 is connected to the lower portion of the ash hopper 18. The slag 14 that has fallen to the lower portion of the ash hopper 18 flows out of the ash hopper 34 through the lock hopper 34 .

The gasification furnace 10 of Fig. 1 employs a gravitational dropping method in which the slag 14 is discharged to the outside of the system by dropping the slag 14 to the lock hopper 34. However, the present invention is not limited to this, It is also possible to employ a transverse suction method in which the material is taken out without being dropped by the lock hopper 34 and reused.

The spreader 24 moves the upper surface of the screen 22 by the hydraulic cylinder 36 and the guide rod 37 to crush the slag 14 deposited on the upper surface of the screen 22. [ The position of the spreader 24 shown in Fig. 2 is a stand-by position before the upper surface of the screen 22 is moved.

On the opposite side of the standby position of the spreader 24, a fixing plate 38 is provided. That is, the spreader 24 scatters the slag 14 deposited on the upper surface of the screen 22 by moving from the standby position to the fixed plate 38. The spreader 24 crushes the accumulated slag 14 by sandwiching the slag 14 between the spreader 24 and the fixed plate 38. On the front surface of the spreader 24, a protrusion 40 is provided to facilitate the crushing of the slag 14. The protrusion 40 shown in Fig. 2 is, for example, a conical shape, but not limited thereto, and may be, for example, a truncated cone shape, a polygonal pyramid shape, or a polygonal pyramid shape.

The spreader 24 according to the first embodiment has an inclined surface 24A which is inclined forward with respect to the crushing direction of the slag 14. [ The inclined surface 24A is provided under the spreader 24. The spreader 24 scrapes the deposited slag 14 mainly by the inclined surface 24A. The upper side of the inclined plane 24A is a vertical plane 24B perpendicular to the screen 22.

The nozzle 26 is a water flow forming means for flowing a liquid to the slag 14 deposited on the screen 22 to form a water flow. As a concrete example, the nozzle 26 is a spray hole for spraying the pressurized liquid. The nozzle 26 according to the first embodiment is provided on the inclined surface 24A of the spreader 24. As shown in the front view of the spreader 24 of Fig. 3, the nozzles 26 are provided horizontally on the inclined plane 24A as an example.

The pressurized liquid ejected from the nozzle 26 is, for example, water, but it is not limited to this, and it may be a liquid capable of breaking the bridging of the slag 14 as described later. The pressurized water is referred to as high-pressure water in the following description. The pressure of the high-pressure water is, for example, 3 to 5 MPa.

The water supply pipe 42 for supplying high pressure water to the ash hopper water supply pipe 28 is branched and connected to the nozzle 26. More specifically, the diverged water supply pipe 42 is connected to the high-pressure hose 44. The high pressure hose 44 is flexible to accommodate the movement of the spreader 24 and is supported by the high pressure hose support 46.

The high pressure hose 44 is connected to the high pressure water header 48. The high-pressure water header 48 supplies high-pressure water to the plurality of nozzles 26.

Next, the operation of the slag crusher 20 according to the first embodiment will be described.

The slag 14 generated in the combuster 12 drops onto the upper surface of the screen 22. [

The slag 14 that is smaller than the diameter of the opening 30 of the screen 22 out of the slag 14 falling on the upper surface of the screen 22 passes through the opening 30 and flows into the lower portion of the ash hopper 18, That is, the lower portion of the gasification furnace 10.

On the other hand, the slag 14 which is larger than the diameter of the opening 30 and the slag 14 which is smaller than the diameter of the opening 30 and which is the accumulation of the slag 14 can not pass through the opening 30, Deposited.

Thus, the spreader 24 moves the upper surface of the screen 22 from the standby position to the fixed plate 38 at predetermined time intervals. Thereby, the spreader 24 crushes the accumulated slag 14 and makes it easier for the slag 14 to pass through the opening 30.

Since the spreader 24 according to the first embodiment applies a downward force to the deposited slag 14 by the inclined surface 24A, the deposited slag 14 can be more reliably broken have.

However, the slag mass in which the small slag 14 is joined by cross-linking is not crushed by the spreader 24, and is sometimes scratched in the moving direction of the spreader 24 without passing through the opening 30 .

Therefore, high pressure water is ejected from the nozzle 26 provided on the inclined surface 24A of the spreader 24 toward the slag 14. [ The high pressure water is sprayed on the particles of the slag 14 bonded by the bridging so that the bond due to the bridging is broken. Thereby, the slag 14 smoothly fluidizes from the stationary state.

Further, since the nozzle 26 is provided on the inclined surface 24A, the high pressure water is ejected more reliably from the slag 14 to be crushed by the spreader 24, so that the accumulated slag 14 can be crushed more reliably .

The ejection of the high-pressure water from the nozzle 26 may be synchronized with the time interval at which the spreader 24 moves, or may be performed intermittently or continuously, regardless of the time interval at which the spreader 24 moves.

Then, the slag 14, which is easy to flow, is flowed by the high-pressure water ejected from the nozzle 26. Thereby, the slag 14 falls from the opening 30 of the screen 22 together with the high-pressure water without moving the spreader 24. Further, the slag 14 can easily fall from the opening 30 even by moving the spreader 24.

As described above, the slag crusher 20 according to the first embodiment is provided so as to intersect with the falling direction of the slag 14 and has a plurality of openings 30, and is smaller than the diameter of the openings 30 A spreader 24 for moving the upper surface of the screen 22 to crush the slag 14 deposited on the upper surface of the screen 22 and a screen 22 for passing the slag 14, And a nozzle 26 for spraying high-pressure water to the deposited slag 14. [

Therefore, the slag crusher 20 can make it easier for the slag 14 deposited on the upper surface of the screen 22 to pass through the opening 30 of the screen 22 more easily. As a result, even if the slag 14 is deposited on the upper surface of the screen 22, the slag 14 can be more reliably discharged by the slag crusher 20. As a result, it is possible to restrain the operation of the gasification furnace 10 from being stopped due to the accumulation of the slag 14, and the continuous operation of the gasification furnace 10 becomes possible.

The slag crusher 20 according to the first embodiment has the nozzle 26 on the inclined surface 24A of the spreader 24 but is not limited thereto and may be provided on the vertical surface 24B of the spreader 24, (26).

[Second Embodiment]

Hereinafter, a second embodiment of the present invention will be described.

The configuration of the gasification furnace 10 according to the second embodiment is the same as that of the gasification furnace 10 according to the first embodiment shown in Fig. 1, and a description thereof will be omitted.

4 is a longitudinal sectional view when viewed from the side of the spreader 24 according to the second embodiment. Fig. 5 is a longitudinal sectional view taken on the front side of the spreader 24 according to the second embodiment, and is a cross-sectional view along the line A-A in Fig. 2 and 3 in Figs. 4 and 5 are denoted by the same reference numerals as those in Figs. 2 and 3, and a description thereof will be omitted.

The nozzle 26 according to the second embodiment is provided on the inclined surface 24A and ejects high pressure water in the direction of the screen 22. [

As an example, a header 50 is provided inside the spreader 24. A plurality of nozzles 26 directed downward are connected to the header 50 and high pressure water is ejected from the nozzles 26 to the upper surface of the screen 22. [ The ejection of the high-pressure water from the nozzle 26 may be synchronized with the time interval at which the spreader 24 moves, or may be performed intermittently or continuously, regardless of the time interval at which the spreader 24 moves. In the case where the slag crusher 20 is provided with the high-pressure water header 48, the header 50 may not be provided.

As a result, in the slag crusher 20 according to the second embodiment, a force is applied downward by the high-pressure water to the slag 14 to be crushed by the spreader 24, It can be surely crushed.

[Third embodiment]

Hereinafter, a third embodiment of the present invention will be described.

The configuration of the gasification furnace 10 according to the third embodiment is the same as that of the gasification furnace 10 according to the first embodiment shown in Fig. 1, and a description thereof will be omitted.

In the slag crusher 20 according to the third embodiment, the screen 22 is provided with a nozzle 60 for spraying high-pressure water.

6 is an example of a vertical cross-sectional view of the screen 22 according to the third embodiment.

In the example of Fig. 6, a nozzle 60 to which high-pressure water is supplied through a header 62 is provided on a side surface of the opening 30 of the screen 22. [ The header 62 is branched and connected to a water supply pipe 42 for supplying high pressure water to the ash hopper water supply pipe 28.

7 is a longitudinal sectional view of a screen 22 according to a modified example of the third embodiment.

In the example of Fig. 7, a nozzle 60 to which high-pressure water is supplied through a header 62 is provided on the upper surface of the screen 22. [

The ejection of the high-pressure water from the nozzle 60 may be synchronized with the time interval at which the spreader 24 moves, or may be performed intermittently or continuously, regardless of the time interval at which the spreader 24 moves.

In the slag crusher 20 according to the third embodiment, high-pressure water is sprayed on the particles of the slag 14 joined by the bridging so that the bond due to the bridging is broken. As a result, the accumulated slag 14 becomes easy to fluidize.

Since the high pressure water is sprayed upward from the downward direction of the screen 22, the accumulation of the slag 14 on the upper surface of the screen 22 can be suppressed and the accumulated slag 14 can be pressurized The liquid can be ejected simply and uniformly.

[Fourth Embodiment]

Hereinafter, a fourth embodiment of the present invention will be described.

The configuration of the gasification furnace 10 according to the fourth embodiment is the same as that of the gasification furnace 10 according to the first embodiment shown in Fig. 1, and a description thereof will be omitted.

8 and 9 are longitudinal sectional views of the screen 22 according to the fourth embodiment. 6 and 7 in Figs. 8 and 9 are denoted by the same reference numerals as those in Figs. 6 and 7, and a description thereof will be omitted.

The screen 22 according to the fourth embodiment ejects a high-pressure gas (hereinafter referred to as a "high-pressure gas") instead of the high-pressure water from the nozzle 60. Due to this, the header 62 is connected to the high-pressure gas feed pipe 42 for feeding the high-pressure gas.

The ejection of the high-pressure gas from the nozzle 60 may be synchronized with the time interval at which the spreader 24 moves or may be intermittently or continuously performed regardless of the time interval at which the spreader 24 moves.

The upper surface of the screen 22 is in a state in which water is supplied by the high pressure water jetted from the nozzle 60 provided in the spreader 24 or the water from the ash hopper water supply pipe 28.

In the slag crusher 20 according to the fourth embodiment of the present invention, gas is ejected from the upper surface of the screen 22 while water is supplied to the upper surface of the screen 22, As shown in Fig. As the bubbles rise, the bond due to the bridging of the slag 14 is broken. This makes the slag 14 deposited on the upper surface of the screen 22 easier to pass through the opening 30 of the screen 22 because the slag 14 is fluidized.

[Fifth Embodiment]

Hereinafter, a fifth embodiment of the present invention will be described.

The configuration of the gasification furnace 10 according to the fifth embodiment is the same as that of the gasification furnace 10 according to the first embodiment shown in Fig. 1, and a description thereof will be omitted.

10 is a top view of the slag crusher 20 according to the fifth embodiment. 11 is a longitudinal sectional view of the screen 22 and the side wall 70 according to the fifth embodiment, and is a sectional view taken along the line A-A in Fig. 2 and 3 in Figs. 10 and 11 are denoted by the same reference numerals as those in Figs. 2 and 3, and a description thereof will be omitted.

The slag crusher 20 according to the fifth embodiment is provided with the nozzle 72 for spraying the high pressure water on the side wall 70 of the screen 22 provided so as to be parallel to the operating direction of the spreader 24 .

As shown in Fig. 11, the nozzle 72 is provided at the bottom of the side wall 70 as an example.

The slag crusher 20 according to the fifth embodiment can easily and uniformly discharge the high pressure water to the accumulated slag 14. [ Since the nozzle 72 is provided in the side wall 70, the nozzle 72 can be simply installed in the slag crusher 20. [

The high-pressure water sprayed from the nozzle 72 may also be used as the ash hopper number.

[Sixth Embodiment]

Hereinafter, a sixth embodiment of the present invention will be described.

The configuration of the gasification furnace 10 according to the sixth embodiment is the same as that of the gasification furnace 10 according to the first embodiment shown in Fig. 1, and a description thereof will be omitted.

12, when the spreader 24 crushes the slag 14, the slag 14 is broken at the bottom of the spreader 24, so that the spreader 24 is tilted forward, There is a possibility that a load is generated on the load 37 and the like and is damaged.

Therefore, the slag crusher 20 according to the sixth embodiment has a guide 80 for limiting the moving direction of the spreader 24, as shown in Figs. 13 to 15. That is, the guide 80 is provided along the moving direction of the spreader 24.

13, 14, and 15 are a top view, a side elevation, and a longitudinal section, respectively, of the slag crusher 20 according to the sixth embodiment.

The slag crusher 20 according to the sixth embodiment has a pair of opposing spreaders 24 as a pair and the pair of spreaders 24 moves on the upper surface of the screen 22 to thereby cause the slag 14 ) Is crushed.

The slag crusher 20 according to the sixth embodiment has two pairs of spreaders 24 adjacent to each other on the upper surface of the screen 22 and the slag crusher 20 between adjacent spreaders 24 And the screen 22 is partitioned by the partitioning portion 81. As shown in Fig. The purge nozzle 83 is provided below the divided regions (hereinafter also referred to as "first chamber 82_1" and "second chamber 82_2"). As shown in Fig. 13, the spreaders 24 of the first system and the third system are paired, and the spreaders 24 of the second system and the fourth system are paired.

The slag crusher 20 may be provided with three or more sets of the pair of spreaders 24. In this case, it is divided into three or more regions by two or more partition portions 81.

14 and 15, the guide 80 is formed by a side plate 80A provided on both sides of the spreader 24 and an upper plate 80B provided on the upper portion of the spreader 24. As shown in Fig.

The upper plate 80B covers a part of the upper portion of the movement range of the spreader 24. Since the partition 81 is provided on the side surface of the spreader 24, it also functions as a guide 80 in addition to partitioning the screen 22. The side plate 80A may be integrated with the side wall 70 of the screen 22.

By providing the guide 80, the movement of the spreader 24 is more stable. Particularly, since the spreader 24 is prevented from rising by the upper plate 80B, the spreader 24 is prevented from tilting forward.

The purge nozzle 83 is provided below the screen 22 in the vicinity of the approximate center of the first chamber 82_1 and the second chamber 82_2 and is provided to the slag 14 from below the screen 22 (Water, hereinafter, referred to as "purge water"). Due to this purge number, the relatively small slag 14 (light slag 14) of the slag 14 on the screen 22 floats from the screen 22.

Next, an operation method of the slag crusher 20 according to the sixth embodiment will be described.

The slag crusher 20 according to the sixth embodiment operates the pair of spreaders 24 alternately. That is, during operation of the slag crusher 20 of the first system and the third system, the slag crusher 20 of the second system and the fourth system does not operate. On the other hand, during operation of the slag crusher 20 of the second system and the fourth system, the slag crusher 20 of the first system and the third system does not operate.

The slag crusher 20 is operated by the flow from the purge nozzle 83 provided below the region corresponding to the predetermined spreader 24 before the predetermined spreader 24 is operated, The slag 14 is moved to a region corresponding to the spreader 24. [

Will be described in detail with reference to FIG.

The purge water is flowed from the purge nozzle 83 provided below the first chamber 82_1 before the spreader 24 of the first and third systems operates. The slag 14 on the screen 22 of the first chamber 82_1 floats and the sides of the slag crusher 20 are the inner walls of the gasifier 10. As a result, (82_2). At this time, the slag 14 moving to the second chamber 82_2 is a relatively small (light) slag 14 and the relatively large (heavy) slag 14 remains in the first chamber 82_1.

The slag 14 moved to the second chamber 82_2 drops from the opening 30 of the screen 22 of the second chamber 82_2.

On the other hand, the slag 14 remaining in the first chamber 82_1 is crushed by operating the spreaders 24 of the first and third systems, and the slag 14 is dropped from the opening 30 of the screen 22 of the first chamber 82_1 .

Then, the slag crusher 20 operates the second and fourth systems of spreaders 24 after the operation of the first and third systems of spreaders 24. In this case, before the second and fourth system spreaders 24 are operated, the purge water is flowed from the purge nozzle 83 provided below the second chamber 82_2, and the screen 22 to move the slag 14 to the first chamber 82_1 and then operate the second and fourth system spreaders 24.

As described above, the slag crusher 20 according to the sixth embodiment is configured such that the small slag 14 is caused to flow into the region corresponding to the other spreader 24 by the water flow from the purge nozzle 83, 22). The working spreader 24 is able to prevent the large slag 14 from remaining on the screen 22 since the relatively large slag 14 which is not flowed by the water flow is broken.

[Seventh Embodiment]

Hereinafter, a seventh embodiment of the present invention will be described.

The configuration of the gasification furnace 10 according to the seventh embodiment is the same as that of the gasification furnace 10 according to the first embodiment shown in Fig. 1, and a description thereof will be omitted. The slag crusher 20 according to the seventh embodiment has a pair of opposing spreaders 24 as a pair and the pair of spreaders 24 moves on the upper surface of the screen 22, ) Is crushed.

Here, Fig. 16 is a longitudinal sectional view for explaining the residual state of the slag 14. Fig.

16, even if the spreader 24 moves, if a gap is generated between the projection 40 at the lowermost portion and the screen 22, the slag 14 may remain in the gap.

Therefore, as shown in Fig. 17, the lower end of the spreader 24 according to the seventh embodiment is formed with the projecting portion 90 so as to be in surface contact with the surface opposed to the spreader 24 in the width direction. The protruding portion 90 is, for example, a rectangular parallelepiped extending in the width direction of the spreader 24.

17A is a state before the spreader 24 is moved, FIG. 17B is a state before the spreader 24 is moved, and FIG. 17B is a front view of the spreader 24 when viewed from the side of the slag crusher 20 according to the seventh embodiment. Is in a state after movement.

17 (B), when the spreader 24 moves, the surfaces of the projecting portions 90 of the opposed spreader 24 come into surface contact with each other across the width direction, The gap is lost.

Therefore, the slag crusher 20 according to the seventh embodiment can more reliably crush the slag 14 on the screen 22, thereby preventing the large slag 14 from remaining on the screen 22 .

While the present invention has been described with reference to the above embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiment. Various modifications or improvements can be added to the embodiments without departing from the gist of the invention, and the technical scope of the present invention includes modifications or improvements. A plurality of the above embodiments may be combined.

For example, in the first to fifth embodiments described above, the spreader 24 and the fixed plate 38 are opposed to each other and the spreader 24 is moved toward the fixed plate 38. However, The present invention is not limited thereto and a spreader 24 may be provided instead of the fixed plate 38 and the slag 14 may be crushed by moving a pair of spreaders 24 on the upper surface of the screen 22. [

In the sixth and seventh embodiments, the spreader 24 is opposed and the pair of spreaders 24 are moved on the upper surface of the screen 22 to crush the slag 14. However, The present invention is not limited thereto and the spreader 24 and the fixed plate 38 may be opposed to each other and the spreader 24 may be moved toward the fixed plate 38. [

In the sixth and seventh embodiments, the slag crusher 20 includes the nozzles 26, 60, and 72 described in the first to fifth embodiments, and these nozzles 26, 60, Or a high-pressure gas may be appropriately ejected. For example, when the spreader 24 does not operate, the nozzles 26, 60, and 72 eject high pressure water or high pressure gas.

In the above-described embodiments, the description has been given of the way in which the nozzles 26, 60 and 72 and the purge nozzle 83 flow water or gas. However, the purity of water is not particularly limited, Aqueous solution or solution may be used for the purpose of easy handling or the like. The gas is, for example, air or an inert gas (such as nitrogen gas or argon gas), but is not particularly limited.

10 Gasification furnace
12 COMBUSTIBLE
14 Slag
20 Slag Crusher
22 screen
24 spreader
24A slope
26 nozzle
30 opening
60 nozzle
70 side wall
72 nozzle
80 guides
81 compartment
83 Purge nozzle

Claims (12)

A slag discharging device, which is provided in a gasifier furnace gasification furnace for gasifying a carbon-containing fuel, and discharges slag generated in the combustor and discharged from the gasifier,
A screen which is provided so as to cross the falling direction of the slag and has a plurality of openings and through which the slag is smaller than the diameter of the opening,
Crushing means for moving the upper surface of the screen to crush the slag deposited on the upper surface of the screen,
And water flow forming means for flowing a liquid to the slag deposited on the screen to form a water flow. The method according to claim 1,
Wherein the water flow forming means is provided on a sidewall of the screen provided so as to be parallel to the operating direction of the crushing means. The method according to claim 1 or 2,
Wherein the water flow forming means is provided in the crushing means. The method according to any one of claims 1 to 3,
Wherein the crushing means has an inclined surface inclined forward with respect to the crushing direction of the slag. The method of claim 4,
Wherein the water flow forming means is provided on the inclined surface and ejects the liquid in the direction of the screen. The method according to any one of claims 1 to 5,
Wherein the water flow forming means is provided on the screen. The method of claim 6,
Wherein the water flow forming means ejects the gas instead of the liquid. The method according to any one of claims 1 to 7,
And a guide for limiting the moving direction of the crushing means. The method according to any one of claims 1 to 8,
A plurality of the crushing means are adjacently provided on the upper surface of the screen and the screen is divided by the partitioning means between the adjacent crushing means and the water flow forming means is provided downwardly Slag discharge device. The method of claim 9,
Characterized in that before the predetermined crushing means is operated, water flows from the water flow forming means provided below the region corresponding to the predetermined crushing means to the region corresponding to another adjacent crushing means, The slag discharging device comprising: The method according to any one of claims 1 to 10,
Wherein the lower end of the crushing means is formed so as to be in surface contact with a surface opposed to the crushing means when the crushing means is moved. A slag discharging method using a slag discharging device which is provided in a gas-fired furnace gas-fired compartment for gasifying a carbon-containing fuel, and discharges the slag produced and dropped from the gas-fired furnace,
A first step of flowing a liquid from the water flow forming means to the slag deposited on the upper surface of the screen having a plurality of openings so as to cross the falling direction of the slag,
Wherein the crushing means for crushing the slag deposited on the upper surface of the screen comprises a second step of moving the upper surface of the screen.

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