KR20140074720A - Fluid bed furnace having complex structure gas distribution portion - Google Patents

Abstract

The present invention provides a fluid bed furnace having a gas distribution unit with a complex structure, which provides a stable structure in a high pressure and high temperature atmosphere. The fluid bed furnace having a gas distribution unit with a complex structure according to an embodiment of the present invention comprises a fluid bed furnace body having a reaction area therein; a gas distribution nozzle unit including multiple nozzles spraying reducing gas to the reaction area; and a supporting unit supporting the gas distribution nozzle unit from the lower side and having a complex structure composed of a first metal structure and a first refractory structure.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fluidized-

Technical aspects of the present invention relate to a flow path, and more particularly, to a flow path having a gas dispersion part of a composite structure.

In the blast furnace method generally used in the steel industry, compacting processes such as sintering and pelletizing of iron ore are required, and there is a limitation in that bituminous coal must be pre-processed into coke. In order to overcome these limitations, a new steelmaking technology, FINEX method, was introduced and used.

The FINEX method is a method that can use spectroscopic iron ore and bituminous coal as it is without being processed. For this purpose, a flow path is used in which a reducing gas is injected from the lower part to reduce the raw material spectra while flowing therein. For the injection of the reducing gas, a gas dispersion part is to be installed in the lower part of the flow path. The gas dispersion unit is composed of a gas dispersion nozzle member and a support member for supporting the gas dispersion nozzle member.

Up to now, the gas dispersion nozzle member and the support member are installed and used as a ceramic refractory structure having high heat resistance. However, since it is used in an atmosphere of high pressure and high temperature in the flow path, the refractory structure constituting the gas dispersion nozzle member and the support member may be damaged during use.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a flow path having a gas dispersion part of a composite structure capable of providing a stable structure in an atmosphere at high pressure and high temperature.

However, these problems are illustrative, and the technical idea of the present invention is not limited thereto.

According to an aspect of the present invention, there is provided a flow path comprising: a flow path body having a reaction region; A gas distribution nozzle member including a plurality of nozzles for spraying a reducing gas into the reaction zone; And a support member supporting the gas dispersion nozzle member from below and having a composite structure composed of the first metal structure and the first refractory structure.

In some embodiments of the present invention, the first refractory structure may be positioned to surround the first metal structure.

In some embodiments of the present invention, the first metal structure may be attached to the bottom portion of the flow path body.

In some embodiments of the present invention, the support member may be radially arranged in the horizontal direction with respect to the center of the flow path body.

In some embodiments of the present invention, the support member may include elongated support members extending in both lateral directions from the center of the flow path body and having a first length.

In some embodiments of the present invention, the support member may include a single support member spaced from the elongate support member and extending in a direction different from the elongate support member.

In some embodiments of the present invention, the monolithic support member comprises: a first monolithic support member having a second length that is less than the first length; And a second short type supporting member having a third length shorter than the second length.

In some embodiments of the present invention, the first and second second support members may be alternately located.

In some embodiments of the present invention, the first metal structure may provide toughness, and the first refractory structure may provide heat resistance.

In some embodiments of the present invention, the gas distribution nozzle member may comprise a second metal structure and a second refractory structure.

In some embodiments of the present invention, the second refractory structure may be positioned to surround the second metal structure.

In some embodiments of the present invention, the second metal structure may be attached to a side portion of the flow path body.

In some embodiments of the present invention, the second metal structure may include holes for constructing the plurality of nozzles.

According to an aspect of the present invention, there is provided a flow path comprising: a flow path body having a reaction region; And a gas dispersion unit having a composite structure composed of a first structure for injecting a reducing gas into the reaction region and providing toughness and a second structure for providing heat resistance.

According to an aspect of the present invention, there is provided a flow path fabrication method comprising: providing a flow path body having a reaction region; Attaching a first metal structure to a lower side of the flow path body; Attaching a second metal structure to an upper side of the first metal structure; Attaching a first refractory structure to a surface of the first metal structure to form a support member; And attaching a second refractory structure to a surface of the second metal structure to form a gas dispersion nozzle member including a plurality of nozzles.

The flow path according to the technical idea of the present invention includes a gas dispersion part having a composite structure composed of a metal structure and a refractory structure. Since the metal structure can provide toughness and the refractory structure can provide heat resistance, the gas dispersion portion can have high durability in a high-temperature and high-pressure gas atmosphere. Accordingly, the repair cycle can be extended, and the number of times of stoppage of operation due to dropout of the refractory material can be reduced.

The effects of the present invention described above are exemplarily described, and the scope of the present invention is not limited by these effects.

1 is a sectional view showing a flow path according to an embodiment of the present invention.
2 is a plan view showing a support member by cutting a flow path according to an embodiment of the present invention along a cutting line II-II.
3 is a plan view showing a support member of a flow path according to an embodiment of the present invention.
4 is a plan view showing a gas distribution nozzle member by cutting a flow path along a cutting line IV-IV according to an embodiment of the present invention.
5 is a cross-sectional view showing a gas distribution nozzle member of a flow path according to an embodiment of the present invention.
6 is a flow chart illustrating a flow path fabrication method according to one embodiment of the present invention.
7A to 11B are schematic views showing a flow furnace manufacturing method according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. The scope of technical thought is not limited to the following examples. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the scope of the invention to those skilled in the art. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items. The same reference numerals denote the same elements at all times. Further, various elements and regions in the drawings are schematically drawn. Accordingly, the technical spirit of the present invention is not limited by the relative size or spacing depicted in the accompanying drawings.

1 is a sectional view showing a flow path 1 according to an embodiment of the present invention.

Referring to Figure 1, the flow path 1 comprises a flow path body 10 having a reaction zone 11; And a gas dispersion portion 60 having a composite structure composed of a first structure for spraying a reducing gas into the reaction region 11 and providing toughness and a second structure for providing heat resistance.

Specifically, the flow path 1 includes a flow path body 10, a raw material inlet port 20, a reducing gas inlet port 30, a gas dispersion nozzle member 40, and a support member 50.

The flow path body 10 may have an outer shape that forms a reaction region 11 in which raw iron ore and the bituminous coal are loaded and reacted. The flow path body 10 may be composed of a metal shell 15 and an inner refractory 16.

The raw material inlet 20 may be provided on the upper side of the flow path body 10, or may be plural. Raw materials such as iron ore spectroscopy and bituminous coal can be charged into the reaction zone 11 through the raw material entry port 20.

The reducing gas inlet 30 may be installed on the lower side of the flow path body 10. A reducing gas such as hydrogen can be charged into the reaction gas inlet 30 through the reaction zone 11 and the reducing gas can float the reaction gas in the reaction zone 11 and induce a reduction reaction. The reducing gas may be at a high temperature and may be injected at a high pressure.

The gas dispersion nozzle member 40 can be installed on the lower side of the flow path body 10. The gas dispersion nozzle member 40 may inject the reducing gas injected from the reducing gas inlet 30 into the reaction region 11 by dispersing it. The gas-dispersing nozzle member 40 may have a composite structure, and may include, for example, a first structure composed of a material that provides toughness and a second structure that provides heat resistance. The first structure may comprise a metal and the second structure may comprise a refractory.

Here, toughness is a material property that considers the strength characteristic and the elongation characteristic together, and is specified by the area of the graph of strength and elongation. In the case of refractories, the strength is strong, while the elongation is low, resulting in low toughness, resulting in brittleness that causes fracture. On the other hand, in the case of metal, since the elongation rate is high along with the strength, it has a high toughness, resulting in plasticity rather than fracture. Therefore, the metal can prevent the destruction of the structure as compared with the refractory, and can prevent the destruction of the structure particularly in a high temperature and high pressure environment.

The support member 50 can be installed on the lower side of the flow path body 10 and can support the gas dispersion nozzle member 40 on the lower side. The support member 50 may have a composite structure and may include, for example, a first structure composed of a material that provides toughness and a second structure that provides heat resistance. The first structure may comprise a metal and the second structure may comprise a refractory.

The gas dispersion nozzle member 40 and the support member 50 may constitute a gas dispersion unit 60 for injecting the reducing gas into the reaction region 11. [

2 is a plan view showing the support member 50 by cutting the flow path 1 along a cutting line II-II according to an embodiment of the present invention. 3 is a plan view showing a supporting member 50 of the flow path 1 according to an embodiment of the present invention.

2 and 3, the support member 50 may be installed to support the gas dispersion nozzle member 40 from below.

The support member 50 may have a composite structure composed of the first metal structure 54 and the first refractory structure 55. The first metal structure 54 can provide toughness to the support member 50 and the first refractory structure 55 can provide heat resistance to the support member 50. [ The first metal structure 54 can increase the structural stability of the support member 50. [ The first refractory structure 55 may function to protect the first metal structure 54 from the high temperature atmosphere. The first metal structure 54 and the first refractory structure 55 can function to support loads together.

The first metal structure 54 may include, for example, cast iron, cast steel, forged steel, steel, bronze, brass, and the like. The first refractory structure 55 may include a ceramic material and may include, for example, aluminum oxide, silicon oxide, and silicon carbide.

The first refractory structure 55 may be positioned to surround the first metal structure 54. For example, the first refractory structure 55 may have a shape such as a brick or a tile, and may be attached to the surface of the first metal structure 54 using a refractory bonding member.

In FIG. 3, the first refractory structure 55 is shown as being positioned to surround the entire surface of the first metal structure 54, but this is exemplary and the technical idea of the present invention is not limited thereto. For example, a case where the first refractory structure 55 is attached only on a part of the surface of the first metal structure 54 is included in the technical idea of the present invention.

The first metal structure 54 may be installed to adhere to the flow path body 10. For example, the first metal structure 54 may be attached to the bottom portion of the flow path body 10. The first metal structure 54 may be attached to the flow path body 10 using bolts, rivets, or by welding. Alternatively, the first metal structure 54 may be provided as an integral structure cast with the metal shell 15 of the flow path body 10.

The support member 50 may be composed of a plurality of supports and may be arranged in various ways. The support member 50 can effectively support the gas dispersion nozzle member 40 and can have an arrangement that smoothes the upward flow of the reducing gas.

For example, the support member 50 may be radially arranged in the male-type direction with respect to the center of the flow path body 10. However, this is illustrative and the technical idea of the present invention is not limited thereto. The reducing gas can flow through the space between the support members 50. [

The support member 50 may include an elongate support member 51, a first single support member 52, and a second single support member 53. The long support member 51, the first short support member 52, and the second short support member 53 may each have the composite structure shown with reference to FIG.

The elongated support member 51 may extend in both directions from the center of the flow path body 10 and may have a first length.

The first and second stage support members 52 and 53 may be spaced apart from the elongate support member 51 and may extend in a direction different from the elongate support member 51. [ The first and second shorting members 52 and 53 may have the same length or different lengths. For example, the first, single-piece support member 52 may have a second length that is less than the first length of the elongated support member 51, and the second, single-ended support member 53 may have a first, Of the first length of the first portion of the first portion. The first stage support member 52 and the second stage support member 53 may be alternately disposed.

4 is a plan view showing the gas dispersion nozzle member 40 by cutting the flow path 1 according to an embodiment of the present invention along a cutting line IV-IV. 5 is a cross-sectional view showing the gas dispersion nozzle member 40 of the flow path 1 according to one embodiment of the present invention. In Fig. 4, the dotted line shows the support member 50 positioned below the gas dispersion nozzle member 40. Fig.

4 and 5, the gas dispersion nozzle member 40 may be installed to be supported by the support member 50 from below. The gas-dispersing nozzle member 40 may include a plurality of nozzles 49 for ejecting the reducing gas into the reaction zone 11. [

The gas dispersion nozzle member 40 may have a composite structure composed of the second metal structure 44 and the second refractory structure 45. The second metal structure 44 may provide toughness to the gas dispersion nozzle member 40 and the second refractory structure 45 may provide heat resistance to the gas dispersion nozzle member 40. The second metal structure 44 can increase the structural stability of the gas dispersion nozzle member 40. [ The second refractory structure 45 may function to protect the second metal structure 44 from the high temperature atmosphere.

The second metal structure 44 may include, for example, cast iron, cast steel, forged steel, steel, bronze, brass, and the like. The second refractory structure 45 may include a ceramic material and may include, for example, aluminum oxide, silicon oxide, and silicon carbide.

The second refractory structure 45 may be positioned to surround the second metal structure 44. For example, the second refractory structure 45 may have a shape such as a brick or a tile, and may be attached to the surface of the second metal structure 44 using a refractory bonding member.

In FIG. 5, the second refractory structure 45 is shown to surround the entire surface of the second metal structure 44, but this is exemplary and the technical idea of the present invention is not limited thereto. For example, a case where the second refractory structure 45 is adhered only on a part of the surface of the second metal structure 44 is included in the technical idea of the present invention.

The second metal structure 44 may be installed to adhere to the flow path body 10. For example, the second metal structure 44 may be attached to a side portion of the flow path body 10. The second metal structure 44 may be attached to the flow furnace body 10 using bolts, rivets, or by welding. Alternatively, the second metal structure 44 may be provided as an integral structure cast with the metal shell 15 of the flow path body 10.

It is noted that the second metal structure 44 may include holes 48 that constitute the nozzles 49 and the second refractory structure 45 is formed such that the holes 48 are not closed.

6 is a flow chart illustrating a flow path fabrication method S1 according to an embodiment of the present invention. The order of the manufacturing process steps described with reference to FIG. 6 is exemplary, and the case of being performed in a different order is also included in the technical idea of the present invention.

Referring to FIG. 6, the flow path fabrication method S1 includes the steps of providing a flow path body having a reaction region (S10), attaching a first metal structure to a lower side of the flow path body (S20) (S30) attaching a second metal structure including a plurality of nozzles on the first metal structure, attaching a first refractory structure to a surface of the first metal structure to form a support member (S40); And attaching a second refractory structure to the surface of the second metal structure to form a gas dispersion nozzle member (S50).

FIGS. 7A and 11B are schematic views showing a flow path manufacturing method (S1) according to an embodiment of the present invention. Figs. 7A to 11B are enlargedly shown on the lower side in the flow path 1 of Fig. Figs. 7A, 8A, 9A, 10A and 11A are sectional views of the flow path 1, and Figs. 7B, 8B, 9B, 10B and 11B are plan views of the flow path 1.

6, 7A, and 7B, step S10 of providing a flow path body 10 having a reaction area 11 is performed. A reducing gas inlet 30 may be located at the lowermost side of the flow path body 10. The flow path body 10 provided at the present stage may be limited to the metal shell 15 and the flow path body 10 may be provided with a support element 19 for constructing a refractory therein. However, the case where the inner refractory 16 attached to the metal shell 15 is provided to provide the flow path body 10 is also included in the technical idea of the present invention.

6, 8A, and 8B, a step S20 of attaching the first metal structure 54 to the lower side of the flow path body 10 is performed. The first metal structure 54 may be attached to the flow path body 10 using bolts, rivets, or by welding. The first metal structure 54 may be composed of a plurality of, and may be arranged in various ways, and may have the same length or different lengths. The first metal structure 54 may include, for example, cast iron, cast steel, forged steel, steel, bronze, brass, and the like.

6, 9A, and 9B, a step S30 of attaching a second metal structure 44 to the top side of the first metal structure 54 is performed. The second metal structure 44 may include holes 48 that constitute the nozzles 49. The first metal structure 54 may support the second metal structure 44.

The dashed line in Fig. 9b shows the first metal structure 54 positioned below the gas distribution nozzle member 40. Fig.

The second metal structure 44 may be attached to the flow furnace body 10 using bolts, rivets, or by welding. The second metal structure 44 may also be attached to the first metal structure 54 using bolts, rivets, or by welding. The second metal structure 44 may include, for example, cast iron, cast steel, forged steel, steel, bronze, brass, and the like. The first metal structure 54 and the second metal structure 44 may comprise the same material or may comprise different materials.

Alternatively, the first metal structure 54 and the second metal structure 44 may be provided as an integral structure cast with the metal shell 15 of the flow path body 10. In this case, the above-described steps S20 and S30 may be omitted.

6, 10A, and 10B, a first refractory structure 55 is attached to the surface of the first metal structure 54 to form a support member 50 (S40).

The dashed line in Fig. 10B shows the first metal structure 54 and the first refractory structure 55 located below the gas distribution nozzle member 40. Fig. The holes 48 of the second metal structure 44 may also be located on the first metal structure 54 and the first refractory structure 55 but the first metal structure 54 and the first refractory structure 55, Are omitted for clarity.

The first refractory structure 55 may be attached to the first metal structure 54 using an adhesion member for refractory. The first metal structure 54 and the first refractory structure 55 may constitute a support member 50.

6, 11A, and 11B, a step (S50) of attaching the second refractory structure 45 to the surface of the second metal structure 44 to form the gas dispersion nozzle member 40 is performed .

In Fig. 11B, the dashed line shows the first metal structure 54 and the first refractory structure 55 located below the gas dispersion nozzle member 40. As shown in Fig. The holes 48 of the second metal structure 44 may also be located on the first metal structure 54 and the first refractory structure 55 but the first metal structure 54 and the first refractory structure 55, Are omitted for clarity.

The second refractory structure 45 may be attached to the second metal structure 44 using an adhesion member for refractories. The second metal structure 44 and the second refractory structure 45 may constitute the gas dispersion nozzle member 40. Here, the second refractory structure 45 should be formed so as not to close the holes 48 of the second metal structure 44, thereby forming the nozzle 49.

The step S40 of forming the support member 50 and the step S50 of forming the gas dispersion nozzle member 40 are also included in the technical idea of the present invention. Also, the step S40 of forming the support member 50 and the step S50 of forming the gas dispersion nozzle member 40 are simultaneously included in the technical idea of the present invention.

During carrying out the step S40 of forming the support member 50 and / or the step S50 of forming the gas dispersion nozzle member 40, the inner refractory 16, which is in contact with the metal shell 15, .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. Will be apparent to those of ordinary skill in the art.

1: flow path, 10: flow path body, 11: reaction area, 19:
20: feedstock inlet port, 30: reducing gas inlet port, 40: gas dispersion nozzle member,
44: second metal structure, 45: second refractory structure, 48: hole, 49: nozzle,
50: support member, 51: elongated support member, 52: first-stage support member,
53: second-type supporting member, 54: first metal structure, 55: first refractory structure,
60: gas dispersion part,

Claims (17)

A flow path body having a reaction zone;
A gas distribution nozzle member including a plurality of nozzles for spraying a reducing gas into the reaction zone; And
A support member supporting the gas dispersion nozzle member from below and having a composite structure including a first metal structure and a first refractory structure;
. The method according to claim 1,
Wherein the first refractory structure is positioned to surround the first metal structure. The method according to claim 1,
Wherein the first metal structure is formed integrally with a bottom portion of the flow path body. The method according to claim 1,
Wherein the first metal structure is attached to a bottom portion of the flow path body. The method according to claim 1,
Wherein the support member is radially arranged in a horizontal direction with respect to a center of the flow path body. The method according to claim 1,
Wherein the support member includes elongated support members extending in both lateral directions from the center of the flow path body and having a first length. The method according to claim 6,
Wherein the support member comprises a single support member spaced from the elongate support member and extending in a direction different from the elongate support member. 8. The method of claim 7,
The single-
A first short type supporting member having a second length shorter than the first length; And
A second short type supporting member having a third length shorter than the second length;
. ≪ / RTI > 9. The method of claim 8,
Wherein the first and second support members are alternately disposed. The method according to claim 1,
The first metal structure provides toughness,
Wherein the first refractory structure provides heat resistance. The method according to claim 1,
Wherein the gas distribution nozzle element comprises a second metal structure and a second refractory structure. 12. The method of claim 11,
And the second refractory structure is positioned to surround the second metal structure. 12. The method of claim 11,
And the second metal structure is integrally formed with a side portion of the flow path body. 12. The method of claim 11,
And the second metal structure is attached to a side portion of the flow path body. 12. The method of claim 11,
Wherein the second metal structure comprises holes for constructing the plurality of nozzles. A flow path body having a reaction zone; And
A gas distributor having a composite structure composed of a first structure for injecting a reducing gas into the reaction region and providing toughness and a second structure for providing heat resistance;
. Providing a flow path body having a reaction zone;
Attaching a first metal structure to a lower side of the flow path body;
Attaching a second metal structure to an upper side of the first metal structure;
Attaching a first refractory structure to a surface of the first metal structure to form a support member; And
Attaching a second refractory structure to a surface of the second metal structure to form a gas dispersion nozzle member including a plurality of nozzles;
≪ / RTI >

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