JP3835909B2 - Slag discharger for coal gasifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a slag discharge device for a coal gasifier that crushes the slag of the coal gasifier.
[0002]
[Prior art]
For example, in a coal gasification furnace, coal is combusted and gasified to melt slag in the coal, and the slag is dropped on the slag discharge device 1 shown in FIG. 4 disposed at the bottom of the gasification furnace. In the slag discharge device 1, since the dropped slag is discharged to the outside of the furnace, the slag that is larger than the pipe connection port 2a and difficult to discharge to the outside of the furnace is crushed. For this reason, in the slag discharge device 1, after dropping the slag into the slag hopper water 16 in the upper slag hopper 5, the slag is crushed by the sandwiching crusher 17 and the roll crusher 8.
[0003]
[Problems to be solved by the invention]
However, when the diameter of the pressure vessel 2 is large, the interaxial distance of the roll shaft 10 of the roll crusher 8 extending in the radial direction and penetrating through the wall portion becomes long. For this reason, the amount of deflection of the roll shaft 10 is increased and the sealing performance of the seal portion 11 of the pressure vessel wall may be reduced as compared with a case where the diameter of the pressure vessel 2 is small and the distance between the roll shafts is short. . In order to reduce the amount of deflection, there is a method of increasing the diameter of the roll shaft 10, but there is a problem that the sealing performance is deteriorated because the weight of the roll shaft 10 becomes heavy.
The present invention has been made in view of the above problems, and is a coal gasification furnace in which the deflection of the roll shaft of the roll type crusher is set to an allowable amount or less and the sealing performance of the wall portion of the slag discharge device through which the roll shaft passes is improved. An object of the present invention is to provide a slag discharge device.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a roll crusher for crushing slag in a container disposed at a slag discharge port of a coal gasification furnace, and a rotating tooth of the roll crusher is provided. In a coal gasification furnace slag discharge device, wherein a fixed roll shaft is disposed through the wall portion of the container, and a bearing for the roll shaft is disposed outside the container , the wall portion of the container In addition, a small-diameter portion having a reduced diameter of the wall portion is provided, and a bearing of the roll shaft is disposed outside the small-diameter portion , and the length between the bearings of the roll shaft is made smaller than the diameter of the wall portion. I did it.
In order to achieve the above object, the present invention provides a roll crusher for crushing slag in a container disposed at a slag discharge port of a coal gasification furnace, and rotating teeth of the roll crusher. In the slag discharge device of a coal gasification furnace, in which the roll shaft to which is fixed is passed through the wall portion of the container and the bearing of the roll shaft is disposed outside the container, the rotating teeth are and arranged in series in the axial direction of the roll axis, and provided with a support member for supporting the upper Symbol roll axis as Ru formed between the rotating teeth.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
A slag discharging apparatus for a coal gasification furnace according to a first embodiment of the present invention will be described with reference to FIG.
The slag discharge device 1 according to the present invention is disposed at the bottom of a coal gasification furnace (not shown), and the bottomed cylindrical pressure vessel 2 that is a casing thereof has different diameters between the upper vessel 3 and the lower vessel 4. . An upper slag hopper 5 having an open bottom is disposed in the upper container 3 having a large diameter, and the bottom opening 5a is disposed at the upper end of the lower container 4 having a small diameter.
[0006]
A roll-type crusher 8 is disposed at the lower portion of the upper slag hopper 5, and the crusher 8 has a cylindrical rotating tooth 9 disposed below the bottom opening 5 a of the upper slag hopper 5. The rotating teeth 9 are fixed to a roll shaft 10 that penetrates the wall of the lower container 4 and is disposed in the horizontal direction. Fixed teeth 15 are arranged facing the lower part from the side of the rotating tooth 9.
A seal portion 11 is provided at a portion where the roll shaft 10 penetrates the wall portion of the lower container 4. A mounting base 12 is fixed to the outer wall portion of the lower container 4, and a bearing 13 that supports the roll shaft 10 is provided on the mounting base 12. Furthermore, an electric motor 14 for rotating the roll shaft 10 is disposed at one end of the roll shaft 10.
A lower slag hopper 7 is disposed inside the lower container 4, and a pipe connection port 2a is provided at the bottom opening 7a.
[0007]
The operation of the slag discharger of the coal gasification furnace of the first embodiment is as follows.
The slag dropped from the slag discharge port of the coal gasifier enters the slag hopper water 16 stored in the upper slag hopper 5 shown in FIG. 1 and falls to the bottom opening 5 a of the upper slag hopper 5. In the bottom opening 5a, the slag is guided between the rotating tooth 9 and the fixed tooth 15 of the roll crusher 8 rotating by the drive of the electric motor 14, and is crushed smaller than the diameter of the pipe connection port 2a. Next, the slag falls to the lower slag hopper 7, passes through the pipe connection port 2a, and is discharged from the pressure vessel 2.
[0008]
In the present embodiment, the roll crusher 8 is arranged in the lower container 4 having a diameter smaller than that of the upper container 3. By installing the roll shaft 10 of the roll crusher 8 in the lower container 4 portion, the distance between the shafts of the roll shaft 10 can be shortened and the amount of deflection can be reduced. Therefore, the sealing performance of the seal portion 11 of the pressure vessel 2 is improved. In addition, the diameter of the roll shaft 10 can be reduced within a specified range of the allowable deflection amount and strength of the roll shaft 10 for ensuring the sealing performance of the seal portion 11, and the sealing performance due to the own weight of the roll shaft 10. The defect is eliminated.
[0009]
Next, the structure of the slag discharge device of the coal gasifier according to the second embodiment of the present invention will be described with reference to FIG.
As shown in the figure, the pressure vessel 2 of the slag discharge device 1 includes an upper vessel 3 having a large diameter and a lower vessel 4 having a small diameter, and an upper slag hopper 5 is disposed in the upper vessel 3. A sandwiching crusher 17 is disposed in the bottom opening 5 a of the upper slag hopper 5. The sandwiching crusher 17 is provided with a spreader guide 18 at the lower portion of the upper container 3, and a pair of spreaders 19 are disposed on the upper surface thereof so as to face each other. Each spreader 19 is attached to a hydraulic jack 20, and both spreaders 19 can be moved in the radial direction of the pressure vessel 2 by operation of a hydraulic unit 21 disposed outside the pressure vessel 2.
[0010]
An intermediate slag hopper 6 is disposed at the boundary between the upper container 3 and the lower container 4 of the pressure vessel 2. In the bottom opening 6 a of the intermediate slag hopper 6, rotating teeth 9 provided on the roll crusher 8 are disposed. The roll shaft 10 to which the rotating teeth 9 are attached penetrates the wall portion of the lower container 4, a seal portion 11 is provided at that portion, and a bearing 13 is provided on the outer wall of the pressure vessel 2. The roll crusher 8 has the same configuration as that of the first embodiment except that it is mounted between the intermediate slag hopper 6 and the lower slag hopper 7.
A lower slag hopper 7 is provided at the lower part of the roll crusher.
[0011]
The operation of the slag discharger for the coal gasifier according to the second embodiment is as follows.
As shown in FIG. 2, in the present embodiment, the slag that has dropped to the bottom opening 5 a of the upper slag hopper 5 is guided to the sandwiching crusher 17. The sandwiching crusher 17 operates the hydraulic unit 21 installed outside the furnace to drive the spreader guide 18 back and forth with the hydraulic jack 20 installed inside the furnace, thereby crushing the slag lump accumulated on the spreader guide 18. . The crushed slag falls to the intermediate slag hopper 6, is crushed smaller than the diameter of the pipe connection port 2a by the roll crusher 8, and is discharged from the lower slag hopper 7 through the pipe connection port 2a. In the present embodiment, since the slag is crushed by the two crushers of the sandwiching crusher 17 and the roll crusher 8 while ensuring a large opening area of the slag, it is smoother than the first embodiment. Slag can be crushed.
[0012]
In the present embodiment, the roll crusher 8 is disposed in the lower container 4 having a smaller diameter than the upper container 3 as in the first embodiment. Therefore, the distance between the roll shafts 10 can be shortened to reduce the amount of deflection. In addition, the diameter of the roll shaft 10 can be reduced within a specified range of the allowable deflection amount of the roll shaft 10 for ensuring the sealing performance of the seal portion 11, and the sealing performance is poor due to the own weight of the roll shaft 10. Disappears.
[0013]
Next, the structure of the slag discharge device of the coal gasification furnace of the 3rd Embodiment of this invention is demonstrated, referring FIG.
As shown in the figure, in the present embodiment, the diameter of the pressure vessel 2 of the slag discharge device 1 is the same from the upper part to the lower part. The sandwiching crusher 17 described in the second embodiment is disposed below the upper slag hopper 5 disposed in the pressure vessel 2. A pair of intermediate slag hoppers 6 are divided and installed at the lower part of the sandwiching crusher 17, and a roll crusher 8 is installed at the lower part of each of the intermediate slag hoppers 6.
[0014]
The roll crusher 8 has a rotating tooth 9 arranged in series in the radial direction of the pressure vessel 2 by a single roll shaft 10, and the roll shaft 10 passes through the seal portion 11 of the wall portion of the pressure vessel 2. Yes. One end of the roll shaft 10 is supported by a bearing 13 installed on the top of the mounting base 12, the other end is supported by the bearing 13, and its tip is connected to an electric motor 14 that rotates the roll shaft 10. Yes.
Further, a support member 22 as a fulcrum of the roll shaft 10 is disposed between the rotary teeth 9 and 9 attached to the roll shaft 10, facing the lower part from the side of the rotary tooth 9, and the fixed teeth 15. Is arranged.
A lower slag hopper 7 is disposed inside the lower container 4, and a pipe connection port 2a is provided at the bottom opening 7a.
[0015]
The operation of the slag discharger for a coal gasifier according to the third embodiment of the present invention is as follows.
The slag lump that has fallen on the upper slag hopper 5 accumulates on the spreader guide 18 and is crushed by the sandwiching crusher 17. Thereafter, the slag is branched and guided to each intermediate slag hopper 6 and further crushed in the same manner as in the second embodiment, but in this embodiment, the rotating teeth 9 and the fixed teeth 15 of the roll crusher 8 are connected. Since two sets are provided, the slag is crushed more quickly and smoothly than in the above embodiment.
[0016]
Moreover, in this Embodiment, the rotation tooth 9 of the roll-type crusher 8 is arrange | positioned in series in the axial direction of the roll axis | shaft 10, and the support member 22 is provided in the site | part of the roll axis | shaft 10 between the rotation teeth 9 and 9. The length between the support portions between the roll shafts 10 can be shortened. Therefore, the amount of deflection of the joint portion between the roll shaft 10 and the wall portion of the pressure vessel 2 can be reduced, and the sealing performance of the roll shaft 10 is improved. In addition, the diameter of the roll shaft 10 can be reduced within a specified range of the allowable deflection amount of the roll shaft 10 for ensuring the sealing performance of the seal portion 11, and the sealing performance is poor due to the own weight of the roll shaft 10. Disappears.
[0017]
As mentioned above, although each embodiment of this invention was described, of course, this invention is not limited to them, A various deformation | transformation is possible based on the technical idea of this invention.
For example, in each of the above embodiments, the shape of the pressure vessel 2 of the slag discharge device 1 is a bottomed cylindrical shape, and the roll shaft 10 of the roll crusher 8 is disposed on the side of the vessel having a small diameter. As for the shape, a rectangular shape is also possible. In this case, the roll shaft 10 is disposed on the side of the container having a small width. Further, the length of the roll shaft 10 may be reduced by providing a concave portion into which the bearing 13 is inserted in the side portion of the pressure vessel and reducing the width of that portion.
Moreover, in the said 3rd Embodiment, although the supporting member 22 was arrange | positioned between the rotation teeth 9 and 9 arrange | positioned in series with the roll axis | shaft 10, in the structure of the prior art example shown in FIG. A pair of support members 22 may be provided on both sides (inside the pressure vessel 2).
The present invention can be applied not only to a coal gasification furnace but also to other furnaces that generate slag.
[0018]
【The invention's effect】
As described above, according to the present invention, a narrow portion is provided in the container disposed at the slag discharge port of the coal gasification furnace, and the roll shaft of the roll crusher is disposed in the narrow portion. Therefore, the length between the bearings of the roll shaft can be shortened. As a result, the deflection of the roll shaft is reduced, the sealing performance of the sealing portion of the container can be improved, and the allowable deflection amount of the roll shaft for ensuring the sealing performance of the sealing portion is within a specified value. Thus, the diameter of the roll shaft can be reduced.
Further, according to the present invention, since the support member that supports the roll shaft of the roll type crusher is provided in the container disposed at the slag discharge port of the coal gasification furnace, the interval between the support widths of the roll shaft is narrow. On the other hand, the deflection is reduced. Accordingly, the diameter of the roll shaft can be reduced within a specified range of the allowable deflection amount of the roll shaft for ensuring the sealing performance of the seal portion, and the sealing performance failure due to the own weight of the roll shaft is eliminated.
[Brief description of the drawings]
FIG. 1A is a schematic longitudinal sectional view of a slag discharger main body of a coal gasification furnace according to a first embodiment of the present invention. B is a figure which shows arrangement | positioning of a rotation tooth and a fixed tooth.
FIG. 2A is a schematic longitudinal sectional view of a slag discharger main body of a coal gasification furnace according to a second embodiment of the present invention. B is a figure which shows arrangement | positioning of a rotation tooth and a fixed tooth.
FIG. 3A is a schematic longitudinal sectional view of a slag discharger main body of a coal gasification furnace according to a third embodiment of the present invention. B is a figure which shows arrangement | positioning of a rotation tooth and a fixed tooth.
FIG. 4 is a schematic longitudinal sectional view of a slag discharger body of a conventional coal gasification furnace. B is a figure which shows arrangement | positioning of a rotation tooth and a fixed tooth.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Slag discharge device 2 Pressure vessel 3 Upper vessel 4 Lower vessel 5 Upper slag hopper 6 Intermediate slag hopper 7 Lower slag hopper 8 Roll crusher 9 Rotating tooth 10 Roll shaft 11 Sealing part 12 Mounting base 13 Bearing 14 Motor 15 Fixed tooth 16 Slag hopper water 17 Crusher 22 Support member

Claims (2)

While providing a roll-type crusher for crushing slag in a container arranged at the slag outlet of the coal gasifier,
The roll axis of rotation teeth of the roll crusher is fixed, by penetrating the seal portion provided on the wall of the container is disposed,
And in the slag discharge device of the coal gasification furnace in which the bearing of the roll shaft is disposed outside the container,
The wall portion of the container is provided with a small diameter portion having a reduced diameter of the wall portion, the roll shaft bearing is disposed outside the small diameter portion, and the length between the bearings of the roll shaft is set to the wall portion. A slag discharger for a coal gasifier characterized by being made smaller than the diameter. While providing a roll-type crusher for crushing slag in a container arranged at the slag outlet of the coal gasifier,
The roll axis of rotation teeth of the roll crusher is fixed, by penetrating the seal portion provided on the wall of the container is disposed,
And in the slag discharge device of the coal gasification furnace in which the bearing of the roll shaft is disposed outside the container,
A slag discharge device for a coal gasification furnace, wherein the rotating teeth are arranged in series in the axial direction of the roll shaft, and a support member for supporting the roll shaft is provided between the rotating teeth. .

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