Blast furnace raw gas pipeline system

Abstract

The utility model discloses a blast furnace crude coal gas pipeline system, including the export pipe, ascending pipe and downcomer who sets gradually along blast furnace gas flow direction, the export pipe's air inlet end is connected with blast furnace roof, the downcomer's air outlet end is connected with dust catcher, still include first support, the ascending pipe is supported on first support, be equipped with the first compensator on the export pipe, be equipped with the second compensator on the ascending pipe, be equipped with the third compensator on the downcomer. The utility model discloses adopting first support to support ascending pipe, is equipped with compensator respectively on export pipe, ascending pipe and downcomer, reduces the stress that blast furnace, each pipeline and dust catcher produce because of thermal expansion and cold shrink, reduces the transverse displacement of ascending pipe, reduces the welding cracking of blast furnace, each pipeline and dust catcher between and takes place, improves structural stability.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace equipment technology, and in particular to a blast furnace crude gas pipeline system. Background Technology

[0002] During blast furnace production, a large amount of high-temperature, high-pressure dust-laden gas is generated, discharged from the furnace top, and enters the dust collector through the crude gas pipeline for coarse dust removal. The blast furnace top, crude gas pipeline, and dust collector experience stress due to thermal expansion and contraction. In the early stages of blast furnace production, this stress is relatively small and within the structural tolerance range. However, after years of continuous production, some linings of the crude gas dust removal system may crack or even detach, further increasing the temperature of the crude gas pipeline and dust collector, thus further increasing the stress on these components and exacerbating the deformation of the crude gas pipeline.

[0003] Traditional blast furnace raw gas pipelines experience significant stress during the later stages of blast furnace production, which can lead to weld cracking and gas leakage, or lateral displacement of the riser pipes causing collisions with the furnace roof structure, affecting structural stability. Therefore, a new blast furnace raw gas pipeline system is urgently needed to address these issues. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a blast furnace crude gas pipeline system, comprising an outlet pipe, an ascending pipe, and a descending pipe arranged sequentially along the blast furnace gas flow direction. The inlet end of the outlet pipe is connected to the top of the blast furnace, and the outlet end of the descending pipe is connected to a dust collector. The system also includes a first support, with the ascending pipe supported on the first support. A first compensator is provided on the outlet pipe, a second compensator is provided on the ascending pipe, and a third compensator is provided on the descending pipe.

[0005] Furthermore, the riser pipe is supported by a fixed support.

[0006] Furthermore, the first compensator includes a connector body and two corrugated pipe sections. The two ends of the connector body are respectively connected to the outlet pipe. The two corrugated pipe sections are spaced apart on the connector body, and a universal ring is fitted on one of the corrugated pipe sections.

[0007] Furthermore, there are two third compensators, which are respectively disposed at both ends of the downcomer.

[0008] Furthermore, it also includes a second support, on which the downcomer is supported, and the second support is disposed between the two third compensators.

[0009] Furthermore, the riser includes multiple riser branches and a riser main pipe, and the number of outlet pipes is multiple. Each riser branch is connected to an outlet pipe in a one-to-one correspondence. After the riser branches converge, they are connected to the downcomer through the riser main pipe. The second compensator is installed on the riser main pipe.

[0010] Furthermore, the ascending pipe and the descending pipe are connected by an arc-shaped connecting pipe.

[0011] Furthermore, the second and third compensators are unidirectional hinge type compensators.

[0012] Furthermore, the downcomer is connected to the dust collector via the dust collector inlet pipe, and a fourth compensator is provided on the dust collector inlet pipe.

[0013] Furthermore, a third support is provided on the housing of the dust collector, and the dust collector inlet pipe is supported on the third support, with the support position located above the fourth compensator.

[0014] Furthermore, the fourth compensator is an axial compensator, and the axis of the axial compensator is parallel to the axis of the dust collector inlet pipe.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0016] 1) The blast furnace crude gas pipeline system provided by this utility model adopts a first support to support the riser pipe and compensators are respectively installed on the outlet pipe, riser pipe and downcomer pipe to reduce the stress caused by thermal expansion and contraction of the blast furnace, each pipeline and dust collector, reduce the lateral displacement of the riser pipe, reduce the occurrence of welding cracks between the blast furnace, each pipeline and dust collector, and improve the structural stability.

[0017] 2) The blast furnace crude gas pipeline system provided by this utility model has blast furnace gas entering the outlet pipe from the blast furnace. The outlet pipe is equipped with a first compensator, which can withstand the combined axial and radial displacement, absorb the stress between the blast furnace and the crude gas pipeline, and improve the stability of the guide pipe.

[0018] 3) The blast furnace crude gas pipeline system provided by this utility model allows the downcomer to be arranged in any direction in the plane, with fewer restrictions on the arrangement of the dust collector and flexible overall layout. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the blast furnace crude gas pipeline system provided by this utility model;

[0021] Figure 2 A side view of the blast furnace crude gas pipeline system provided by this utility model;

[0022] Figure 3 Top view of the blast furnace crude gas pipeline system provided by this utility model;

[0023] Figure 4 A schematic diagram of the structure of the first compensator in the blast furnace crude gas pipeline system provided by this utility model;

[0024] Figure 5 The blast furnace crude gas pipeline system provided by this utility model Figure 4 Schematic diagram of Part A;

[0025] Figure 6 A side view of the first compensator in the blast furnace crude gas pipeline system provided by this utility model.

[0026] 1-Blast furnace top; 2-Outlet pipe; 21-First compensator; 211-First connecting pipe section; 212-Second connecting pipe section; 213-Third connecting pipe section; 214-First corrugated pipe section; 215-Second corrugated pipe section; 216-Wrapped connecting pipe; 217-Universal ring; 218-Pin shaft; 219-Reinforcing ring; 2110-Mounting base; 2111-Secondary tie plate; 2112-Firming plate; 2113-Filling layer; 2114-Tie rod ; 2115-Filling material; 2116-Guide cylinder; 3-Rising pipe; 31-Second compensator; 32-Rising branch pipe; 33-Rising main pipe; 4-Downcomer; 41-Third compensator; 5-Dust collector; 51-Third support; 6-First support; 61-Support part; 7-Second support; 8-Arc-shaped connecting pipe; 81-Vent pipe; 82-Vent valve; 9-Dust collector inlet pipe; 91-Fourth compensator; 92-Gas shut-off valve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. In the accompanying drawings, the dimensions and relative dimensions of certain parts may be enlarged for clarity.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "connected" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] In the description of this utility model, the terms "upper", "lower", "left", "right", "front", "back", "center", "horizontal", "vertical", "top", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, in the description of this utility model, the terms "first" and "second" are used merely for descriptive distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Additionally, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0031] As per the instruction manual Figure 1-3 As shown, this utility model provides a blast furnace crude gas pipeline system, including an outlet pipe 2, an ascending pipe 3, and a descending pipe 4 arranged sequentially along the blast furnace gas flow direction. The inlet end of the outlet pipe 2 is connected to the blast furnace top 1, and the outlet end of the descending pipe 4 is connected to a dust collector 5. The system also includes a first support 6, with the ascending pipe 3 supported on the first support 6. The outlet pipe 2 is provided with a first compensator 21, the ascending pipe 3 is provided with a second compensator 31, and the descending pipe 4 is provided with a third compensator 41.

[0032] Preferably, it also includes a second support 7, on which the descending tube 4 is supported.

[0033] Specifically, the first support 6 is located near the blast furnace top 1, and one end of the outlet pipe 2 is connected to the blast furnace top 1. The blast furnace gas generated at the blast furnace top 1 enters the dust collector 5 for dust removal after passing through the outlet pipe 2, the riser pipe 3, and the downcomer pipe 4. In this embodiment, the first support 6 is preferably located on the main platform of the furnace top, and the riser pipe 3 is supported on the main platform of the furnace top. The main platform of the furnace top is the uppermost platform of the furnace frame. The downcomer pipe 4 is supported by the second support 7. The downcomer pipe 4 can be arranged in any position and direction in the plane, allowing for flexible arrangement of the pipes and dust collector, and ensuring smooth airflow of the blast furnace gas.

[0034] In an optimized implementation, the first compensator 21 is preferably a combination of a universal hinge and an axial joint. Specifically, the first compensator 21 includes a connecting pipe body and two corrugated pipe sections. Both ends of the connecting pipe body are connected to the outlet pipe. The two corrugated pipe sections are spaced apart on the connecting pipe body, and a universal ring is fitted onto one of the corrugated pipe sections. The first compensator 21 can withstand combined axial and radial displacements, absorb stress between the blast furnace and the crude gas pipeline, and improve the stability of the guide pipe.

[0035] Specifically, see the instruction manual. Figure 4-6 As shown, the connector body includes a first connector section 211, a second connector section 212, and a third connector section 213 arranged sequentially. Two corrugated pipe sections are respectively referred to as the first corrugated pipe section 214 and the second corrugated pipe section 215. The first corrugated pipe section 214 is located between and connected to the first connector section 211 and the second connector section 212. The second corrugated pipe section 215 is located between and connected to the second connector section 212 and the third connector section 213. The first connector section 211, the second connector section 212, the third connector section 213, the first corrugated pipe section 214, and the second corrugated pipe section 215 are connected to form a medium channel. The third connector section 213 is also connected to a wrapping connector 216. The first connector section 211 and the wrapping connector 216 are respectively connected to the outlet pipe 2. A universal ring 217 is sleeved on the first corrugated pipe section 214. The universal ring 217 is connected to the first corrugated pipe section 214 through a pin 218. The universal joint can absorb the angular and lateral displacement of the pipeline caused by thermal deformation or mechanical vibration, and the second corrugated pipe section 215 can absorb the linear expansion and contraction of the pipeline caused by temperature changes.

[0036] Specifically, the second corrugated pipe section 215 is also provided with a reinforcing ring 219.

[0037] Specifically, the first connecting pipe section is provided with a mounting base 2110, and the universal ring 217 is connected to a secondary pull plate 2111, which is connected to the mounting base 2110.

[0038] Specifically, both ends of the second corrugated pipe section 215 are provided with stiffening plates 2112. One stiffening plate 2112 is connected to the second connecting pipe section 212, and the other stiffening plate 2112 is connected to the third connecting pipe section 213. A filler layer 2113 is provided between the second corrugated pipe section 215 and the connecting pipe section to achieve a sealing effect. A tie rod 2114 is connected between the two stiffening plates 2112. To meet the requirements of expansion and contraction, the tie rod 2114 is preferably a telescopic rod. A filler material 2115 is provided between the second connecting pipe section 212 and the third connecting pipe section 213 to further achieve a sealing effect. A guide tube 2116 is provided on the outside of the connection between the second connecting pipe section 212 and the third connecting pipe section 213.

[0039] The first corrugated pipe section 214 and the second corrugated pipe section 215 have the same structure, and will not be described again here.

[0040] In the optimized implementation, there are two third compensators 41, which are respectively located at both ends of the downcomer 4. One third compensator 41 is located at the end of the downcomer 4 closest to the upcomer 3, and the other third compensator 41 is located at the end of the downcomer 4 closest to the dust collector 5.

[0041] Specifically, the second bracket 7 is positioned between the two third compensators 41. To ensure better support, the second bracket 7 is supported in the middle of the downcomer 4.

[0042] As one of the specific implementation methods, the third compensator 41 is preferably a one-way hinge type compensator. The one-way hinge type compensator is installed on the downcomer 4. The one-way hinge type compensator is a compensation device used to absorb the angular displacement of the pipeline (that is, rotation in a single plane). It adapts to the thermal expansion and contraction or vibration of the pipeline by rotating the hinge structure, and allows angular displacement to occur in a plane.

[0043] In some embodiments, the two third compensators 41 may be compensators of different models.

[0044] In an optimized implementation, the riser pipe 3 includes four riser branch pipes 32 and one riser main pipe 33. Four outlet pipes 2 are connected to the blast furnace top 1, each outlet pipe 2 connecting to one riser branch pipe 32. The riser branch pipes 32 converge in pairs to form a single port, which connects to the riser main pipe 33. The riser main pipe 33 is connected to the downcomer pipe 4. Each outlet pipe 2 is equipped with a first compensator 21, and a second compensator 31 is installed on the riser main pipe 33. The first compensator 21 on the outlet pipe 2 can absorb the deformation of the blast furnace shell caused by thermal expansion and contraction, and reduce the stress exerted by the blast furnace shell on the outlet pipes 2 and the riser pipe 3.

[0045] Specifically, the rising branch pipes 32 are evenly distributed on the blast furnace top 1. The main platform of the furnace top is provided with four support parts 61, and the bottom of each rising branch pipe 32 is respectively set on the support part 61. The pipe load is transferred to the blast furnace foundation through the furnace frame. The support part 61 is supported by a fixed support.

[0046] As one specific implementation, the second compensator 31 is preferably a one-way hinge type compensator.

[0047] The second compensator 31 and the two third compensators 41 work together to absorb the angular displacement of the pipeline between the compensators during thermal expansion and contraction, reduce the stress between the pipelines, and improve the structural stability.

[0048] In an optimized implementation, the ascending pipe 3 and the descending pipe 4 are connected by an arc-shaped connecting pipe 8. The two ends of the arc-shaped connecting pipe 8 are connected to the ascending main pipe 33 and the descending pipe 4 respectively. The connection between the ascending main pipe 33 and the descending pipe 4 via the arc-shaped connecting pipe provides natural compensation, initially compensating for pipe deformation caused by thermal expansion and contraction, preventing pipe stress cracking, and also buffering vibrations to protect the stability of the pipe connection.

[0049] Specifically, the arc-shaped connecting pipe 8 is also connected to a vent pipe 81, and the vent pipe 81 is equipped with a vent valve 82 for venting the gas from the furnace top.

[0050] In an optimized implementation, the downcomer 4 is connected to the dust collector 5 via the dust collector inlet pipe 9, and the dust collector inlet pipe 9 is equipped with a fourth compensator 91.

[0051] Specifically, the dust collector 5 has a third support 51 on its housing, the dust collector inlet pipe 9 is supported on the third support 51, the third support 51 has a connecting part, the dust collector inlet pipe 9 is fixed on the connecting part, and the fourth compensator 91 is disposed between the connecting part and the dust collector inlet end.

[0052] As one specific implementation, the fourth compensator 91 is preferably an axial compensator, the axis of which is parallel to the axis of the dust collector inlet pipe 9. The axial compensator is used to absorb axial displacement caused by temperature changes, mechanical vibration, or pressure fluctuations. The axial compensator can expand and contract along the pipeline axis, while reducing stress on the pipeline. In this embodiment, the axial compensator can be a bellows compensator.

[0053] Preferably, the dust collector 5 is a gravity dust collector or a cyclone dust collector.

[0054] Preferably, a gas shut-off valve 92 is provided on the inlet pipe of the dust collector. The gas shut-off valve is preferably a spectacle-type gas shut-off valve, used to shut off the gas supply during maintenance. The gas shut-off valve is located below the fourth compensator.

[0055] This application optimizes the outlet pipe 2, riser pipe 3, downcomer pipe 4, first support 6, second support 7, and compensator to reduce the stress caused by thermal expansion and contraction of the blast furnace, various pipelines, and dust collector 5, reduce the lateral displacement of the riser pipe 3, reduce the occurrence of weld cracking between the blast furnace, various pipelines, and dust collector 5, and improve structural stability.

[0056] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0057] Those skilled in the art will understand that this invention can be implemented in many other specific forms without departing from the spirit and scope of this invention. Although embodiments of this invention have been described, it should be understood that this invention is not limited to these embodiments, and those skilled in the art can make changes and modifications within the spirit and scope of this invention as defined in the appended claims.

Claims

1. A blast furnace crude gas pipeline system, comprising an outlet pipe, an ascending pipe, and a descending pipe arranged sequentially along the blast furnace gas flow direction, wherein the inlet end of the outlet pipe is connected to the top of the blast furnace, and the outlet end of the descending pipe is connected to a dust collector, characterized in that, It also includes a first support, the riser pipe is supported on the first support, the outlet pipe is provided with a first compensator, the riser pipe is provided with a second compensator, and the downcomer pipe is provided with a third compensator.

2. The blast furnace raw gas duct system according to claim 1, characterized in that The first compensator includes a connector body and two corrugated pipe sections. The two ends of the connector body are respectively connected to the outlet pipe. The two corrugated pipe sections are spaced apart on the connector body, and a universal ring is fitted on one of the corrugated pipe sections.

3. The blast furnace raw gas duct system according to claim 1, characterized in that The number of the third compensators is two, and the two third compensators are respectively installed at both ends of the downcomer.

4. The blast furnace raw gas duct system according to claim 3, characterized in that It also includes a second support, on which the downcomer is supported, and the second support is disposed between the two third compensators.

5. The blast furnace raw gas duct system according to claim 1, characterized in that The riser includes multiple riser branches and a riser main pipe. There are multiple outlet pipes. Each riser branch is connected to an outlet pipe in a one-to-one correspondence. After the riser branches converge, they are connected to the downcomer through the riser main pipe. The second compensator is installed on the riser main pipe.

6. The blast furnace raw gas duct system according to claim 1, characterized in that The ascending pipe and the descending pipe are connected by an arc-shaped connecting pipe.

7. The blast furnace raw gas duct system according to claim 1, characterized in that The second and third compensators are unidirectional hinge type compensators.

8. The blast furnace raw gas duct system according to claim 1, characterized in that The downcomer pipe is connected to the dust collector through the dust collector inlet pipe, and the dust collector inlet pipe is equipped with a fourth compensator.

9. The blast furnace crude gas pipeline system according to claim 8, wherein the dust collector shell is provided with a third support, the dust collector inlet pipe is supported on the third support, and the support position is located above the fourth compensator.

10. The blast furnace raw gas duct system according to claim 8, characterized in that The fourth compensator is an axial compensator, and the axis of the axial compensator is parallel to the axis of the dust collector inlet pipe.

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