CN108193010B - Lining building structure of hot air pipeline and three-fork lining building structure of hot air pipeline - Google Patents
Lining building structure of hot air pipeline and three-fork lining building structure of hot air pipeline Download PDFInfo
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- CN108193010B CN108193010B CN201810194824.5A CN201810194824A CN108193010B CN 108193010 B CN108193010 B CN 108193010B CN 201810194824 A CN201810194824 A CN 201810194824A CN 108193010 B CN108193010 B CN 108193010B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/10—Other details, e.g. blast mains
Abstract
The invention discloses a hot air pipeline lining building structure and a hot air pipeline three-fork lining building structure, wherein the hot air pipeline lining building structure comprises a working layer, a first heat-preserving layer, a second heat-preserving layer and a spraying layer which are sequentially overlapped from inside to outside, the hot air pipeline lining building structure is in a horizontal or inclined state, a high-temperature-resistant castable layer (5) is arranged between the working layer and the second heat-preserving layer, a high-temperature-resistant compressible material layer (6) is arranged between the second heat-preserving layer and the spraying layer, and the high-temperature-resistant castable layer (5) and the high-temperature-resistant compressible material layer (6) are both positioned on the upper part of the hot air pipeline lining building structure. The invention effectively overcomes the defect that the prior hot air pipeline lining is easy to damage, not only enhances the high temperature resistance and extrusion resistance of the hot air pipeline lining, but also ensures the heat insulation effect of the upper part of the whole hot air pipeline lining, and is beneficial to the structural stability and the service life extension of the hot air pipeline.
Description
Technical Field
The invention relates to the technical field of hot blast stoves, in particular to a lining building structure of a hot air pipeline, and also relates to a three-fork lining building structure of a hot air pipeline.
Background
The hot blast stove is one of main facilities for blast furnace iron-making production, and has the main function of continuously providing hot blast for the blast furnace. As the temperature of hot air required for blast furnace production is continuously increased, how to ensure safe operation of hot air pipes that carry the task of hot air delivery has become an extremely important topic in blast furnace production.
Generally, the weakest link affecting the safe operation of the hot air duct is at the triple junction of the hot air duct. The conventional working layer of the three-fork lining of the hot air pipeline is generally built by adopting small combined bricks and adopting common light insulating bricks outside. Under the action of high-temperature and high-pressure gas, the working layer combined brick is extremely easy to shift and loosen, so that the high-temperature gas is in direct contact with an external common light insulating brick through a brick joint, and the common light insulating brick is extremely easy to damage and drop under the action of high temperature and extrusion. Over time, safety accidents such as wind-crossing, brick falling, furnace shell burning and the like often occur in the inner lining of the three-fork part of the hot air pipeline, and the normal operation of blast furnace production is seriously influenced.
Disclosure of Invention
In order to solve the problems of poor structural stability and short service life of the existing hot air pipeline, the invention provides a lining building structure of the hot air pipeline and a three-fork lining building structure of the hot air pipeline, wherein the lining building structure of the hot air pipeline is provided with an integral high-temperature-resistant pouring material layer in the upper 120 DEG (or 180 DEG) range between a working layer and a second heat-insulating layer to replace a first heat-insulating layer at the position; and a second heat-insulating layer between the high-temperature-resistant castable layer and the spray coating is reserved. The invention effectively overcomes the defect that the prior hot air pipeline lining is easy to damage, not only enhances the high temperature resistance and extrusion resistance of the hot air pipeline lining, but also ensures the heat insulation effect of the upper part of the whole hot air pipeline lining, and is beneficial to the structural stability and the service life extension of the hot air pipeline.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a hot-blast pipeline's lining building structure, includes from interior to outside range upon range of operational layer, first heat preservation, second heat preservation and the spraying layer of establishing in proper order, hot-blast pipeline's lining building structure is level or incline status, is equipped with high temperature resistant pouring material layer between this operational layer and the second heat preservation, is equipped with high temperature resistant compressible material layer between this second heat preservation and the spraying layer, high temperature resistant pouring material layer and high temperature resistant compressible material layer all are located hot-blast pipeline's lining building structure's upper portion.
The lining building structure of the hot air pipeline is in a horizontal state, and the central angle corresponding to the high-temperature resistant castable layer is smaller than or equal to the central angle corresponding to the high-temperature resistant compressible material layer.
The central angle corresponding to the high-temperature resistant castable layer is 120-180 degrees, and the central angle corresponding to the high-temperature resistant compressible material layer is 120-180 degrees.
The thickness of the high-temperature-resistant castable layer is the same as that of the first heat-preserving layer, and two ends of the high-temperature-resistant castable layer are correspondingly connected with two ends of the first heat-preserving layer along the circumferential direction of the lining building structure of the hot air pipeline.
The inner diameter of the high-temperature-resistant compressible material layer is equal to the outer diameter of the second heat preservation layer, and the thickness of the high-temperature-resistant compressible material layer is less than half of the thickness of the spraying layer.
A three-fork lining building structure of a hot air pipeline comprises a cylindrical hot air branch pipe lining and a hot air main pipe lining, wherein the structure of the hot air branch pipe lining and the structure of the hot air main pipe lining are the same as the lining building structure of the hot air pipeline, one end of the hot air branch pipe lining is communicated with the hot air main pipe lining, and the center line of the hot air branch pipe lining and the center line of the hot air main pipe lining are in a horizontal state.
In the lining of the hot air branch pipe, a working layer, a first heat-insulating layer, a second heat-insulating layer, a high-temperature-resistant castable layer, a high-temperature-resistant compressible material layer and a spray coating in the lining building structure of the hot air pipeline are sequentially a hot air branch pipe working layer, a hot air branch pipe first heat-insulating layer, a hot air branch pipe second heat-insulating layer, a hot air branch pipe high-temperature-resistant castable layer, a hot air branch pipe high-temperature-resistant compressible material layer and a hot air branch pipe spray coating.
In the lining of the hot air main pipe, a working layer, a first heat-insulating layer, a second heat-insulating layer, a high-temperature-resistant castable layer, a high-temperature-resistant compressible material layer and a spraying layer in the lining building structure of the hot air pipeline are sequentially a hot air main pipe working layer, a hot air main pipe first heat-insulating layer hot air main pipe second heat-insulating layer, a hot air main pipe high-temperature-resistant castable layer, a hot air main pipe high-temperature-resistant compressible material layer and a hot air main pipe spraying layer.
The central line of the hot air branch pipe lining is perpendicular to the central line of the hot air main pipe lining, the inner diameter of the hot air branch pipe lining is smaller than or equal to the inner diameter of the hot air main pipe lining, and the outer diameter of the hot air branch pipe lining is smaller than or equal to the outer diameter of the hot air main pipe lining.
The hot air branch pipe lining is sleeved with a hot air branch pipe steel shell, the hot air main pipe lining is sleeved with a hot air main pipe steel shell, the thickness of the high-temperature resistant pouring material layer is 100-150 mm, and the thickness of the high-temperature resistant compressible material layer is 10-50 mm.
The beneficial effects of the invention are as follows:
1. the integral high-temperature resistant castable layer is arranged in the range of 120 degrees (or 180 degrees) of the upper part between the working layer of the hot air pipeline lining building structure and the working layer of the hot air pipeline triple-fork lining building structure and the second heat-insulating layer, so that the high-temperature resistant and extrusion resistant capabilities of the hot air pipeline lining building structure and the hot air pipeline triple-fork lining building structure are enhanced, and the structural stability and the service life of the whole hot air pipeline lining are facilitated.
2. The second heat-insulating layer between the integral high-temperature-resistant castable layer and the spray coating layer is arranged, so that the heat-insulating effect of the inner lining building structure of the whole hot air pipeline and the upper part of the inner lining building structure of the three-fork of the hot air pipeline is ensured, and the temperature of the outer steel shell is not too high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Fig. 1 is a schematic diagram of the overall structure of the hot air pipeline triple-fork lining building structure.
Fig. 2 is a cross-sectional view taken along A-A in fig. 1.
Fig. 3 is a sectional view taken along the direction B-B in fig. 1.
Fig. 4 is a cross-sectional view taken along the direction C-C in fig. 1.
Fig. 5 is a sectional view taken along the direction D-D in fig. 1.
1. A hot air branch pipe steel shell; 2. a hot air branch pipe lining; 3. a hot air main pipe steel shell; 4. a hot air main pipe lining; 5. a high temperature resistant castable layer; 6. a layer of high temperature resistant compressible material;
21. a hot air branch pipe working layer; 22. a first heat-preserving layer of the hot air branch pipe; 23. a second heat-insulating layer of the hot air branch pipe; 24. spraying a coating on the hot air branch pipe;
41. a hot air main pipe working layer; 42. a hot air main pipe is provided with a first heat preservation layer; 43. a hot air main pipe is a second heat insulation layer; 44. a hot air main pipe is sprayed with a coating;
51. high-temperature resistant castable layers of the hot air branch pipes; 52. a hot air main pipe high temperature resistant castable layer;
61. a high temperature resistant compressible material layer of the hot air branch pipe; 62. the hot air main pipe is provided with a high-temperature-resistant compressible material layer.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
The utility model provides a hot-blast pipeline's lining building structure, includes from interior to outside range upon range of operational layer, first heat preservation, second heat preservation and the spraying layer of establishing in proper order, hot-blast pipeline's lining building structure is level or incline status, is equipped with high temperature resistant pouring material layer 5 between this operational layer and the second heat preservation, is equipped with high temperature resistant compressible material layer 6 between this second heat preservation and the spraying layer, high temperature resistant pouring material layer 5 and high temperature resistant compressible material layer 6 all are located hot-blast pipeline's lining building structure's upper portion, as in fig. 1 to 5.
The high-temperature resistant castable layer 5 can be formed by casting the existing high-temperature resistant castable (such as high-temperature ceramic castable) at one time, and concrete casting methods can be referred to for specific forming methods. The high temperature resistant compressible material layer 6 can be made of existing refractory fiber products (such as refractory fiber cotton, refractory fiber felt, etc.). The high-temperature resistant castable layer 5 mainly plays a role in bearing about, the high-temperature resistant compressible material layer 6 mainly plays a role in reducing stress, and the high-temperature resistant castable layer 5 and the high-temperature resistant compressible material layer 6 are combined for use, so that good effects of adapting to high wind temperature, stable structure and long service life can be obtained.
In this embodiment, the lining building structure of the hot air duct is a cylindrical structure, and the lining building structure of the hot air duct is in a horizontal state, that is, the center line of the lining building structure of the hot air duct is parallel to the horizontal plane. The sections of the high-temperature-resistant castable layer 5 and the high-temperature-resistant compressible material layer 6 are arc-shaped, and as shown in fig. 4 and 5, the central angle corresponding to the high-temperature-resistant castable layer 5 is smaller than or equal to the central angle corresponding to the high-temperature-resistant compressible material layer 6. Specifically, the central angles corresponding to the high-temperature resistant castable layer 5 and the high-temperature resistant compressible material layer 6 can be 120-180 degrees, which is not limited by the embodiment.
In this embodiment, the thickness of the refractory castable layer 5 is the same as that of the first heat-preserving layer, that is, the first heat-preserving layer is replaced by the refractory castable layer 5 at the upper part (120 ° to 180 °) of the lining building structure of the hot air duct, and two ends of the refractory castable layer 5 are correspondingly connected with two ends of the first heat-preserving layer along the circumferential direction of the lining building structure of the hot air duct, as shown in fig. 4 and 5.
In this embodiment, the inner diameter of the high temperature resistant compressible material layer 6 is equal to the outer diameter of the second insulation layer, and the thickness of the high temperature resistant compressible material layer 6 is less than half the thickness of the sprayed layer. The working layer, the high-temperature resistant castable layer 5, the second heat-insulating layer, the high-temperature resistant compressible material layer 6 and the spray coating are tightly laminated and arranged from inside to outside (namely from bottom to top) at the upper part of the lining building structure of the hot air pipeline.
In this embodiment, two parts of the refractory castable layer 5 cut by the plane where the center line of the lining structure of the hot air duct is located are mirror images of each other, that is, as shown in fig. 4 and 5, the left and right sides of the refractory castable layer 5 are mirror images of each other, and two parts of the refractory compressible material layer 6 cut by the plane where the center line of the lining structure of the hot air duct is located are mirror images of each other, that is, as shown in fig. 4 and 5, the left and right sides of the refractory compressible material layer 6 are mirror images of each other.
The lining building structure of the hot air pipeline can be suitable for straight pipelines, is particularly suitable for the connection part of the pipelines, and is described below by taking a three-way fork (which can be understood as a three-way structure) of the hot air pipeline as an example.
A three-fork-shaped lining building structure of a hot air pipeline comprises a cylindrical hot air branch pipe lining 2 and a cylindrical hot air main pipe lining 4, wherein the structure of the hot air branch pipe lining 2 and the structure of the hot air main pipe lining 4 are the same as those of the lining building structure of the hot air pipeline, each of the hot air branch pipe lining 2 and the hot air main pipe lining 4 comprises a working layer, a first heat-preserving layer, a second heat-preserving layer, a high-temperature-resistant castable layer 5, a high-temperature-resistant compressible material layer 6 and a spraying layer in the lining building structure of the hot air pipeline, one end of the hot air branch pipe lining 2 is communicated with the hot air main pipe lining 4, and the central lines of the hot air branch pipe lining 2 and the hot air main pipe lining 4 are in a horizontal state, namely, the central lines of the hot air branch pipe lining 2 and the hot air main pipe lining 4 in fig. 1 are parallel to the horizontal plane.
In the hot air branch pipe lining 2, the working layer, the first heat-insulating layer, the second heat-insulating layer, the high-temperature-resistant castable layer 5, the high-temperature-resistant compressible material layer 6 and the spray coating in the lining building structure of the hot air pipeline are sequentially a hot air branch pipe working layer 21, a hot air branch pipe first heat-insulating layer 22, a hot air branch pipe second heat-insulating layer 23, a hot air branch pipe high-temperature-resistant castable layer 51, a hot air branch pipe high-temperature-resistant compressible material layer 61 and a hot air branch pipe spray coating 24. Wherein, the central angle corresponding to the high-temperature resistant castable layer 51 of the hot air branch pipe is 120 degrees, and the central angle corresponding to the high-temperature resistant compressible material layer 61 of the hot air branch pipe is 180 degrees.
In the hot air main pipe lining 4, the working layer, the first heat-insulating layer, the second heat-insulating layer, the high-temperature-resistant castable layer 5, the high-temperature-resistant compressible material layer 6 and the spray coating in the lining structure of the hot air pipe are sequentially a hot air main pipe working layer 41, a hot air main pipe first heat-insulating layer 42, a hot air main pipe second heat-insulating layer 43, a hot air main pipe high-temperature-resistant castable layer 52, a hot air main pipe high-temperature-resistant compressible material layer 62 and a hot air main pipe spray coating 44. Wherein, the central angle corresponding to the high temperature resistant castable layer 52 of the hot air main pipe is 120 degrees, and the central angle corresponding to the high temperature resistant compressible material layer 62 of the hot air main pipe is 180 degrees.
In the present embodiment, the center line of the hot air branch pipe liner 2 is perpendicular to the center line of the hot air main pipe liner 4, and the inside diameter (drift diameter) of the hot air branch pipe liner 2 is equal to or larger than the inside diameter (drift diameter) of the hot air main pipe liner 4, i.e., d 2 ≤d 1 The outer diameter of the hot air branch pipe lining 2 is smaller than or equal to the outer diameter of the hot air main pipe lining 4, namely D 2 ≤D 1 As shown in fig. 1.The hot air branch pipe lining 2 is sleeved with the hot air branch pipe steel shell 1, the hot air main pipe lining 4 is sleeved with the hot air main pipe steel shell 3, the thickness of the high-temperature resistant castable layer 5 (the hot air branch pipe high-temperature resistant castable layer 51 and the hot air main pipe high-temperature resistant castable layer 52) is 100-150 mm, and the thickness of the high-temperature resistant compressible material layer 6 (the hot air branch pipe high-temperature resistant compressible material layer 61 and the hot air main pipe high-temperature resistant compressible material layer 62) is 10-50 mm.
In the present embodiment, the hot air branch pipe working layer 21 is correspondingly connected with the hot air main pipe working layer 41, the hot air branch pipe first heat insulating layer 22 is correspondingly connected with the hot air main pipe first heat insulating layer 42, the hot air branch pipe second heat insulating layer 23 is correspondingly connected with the hot air main pipe second heat insulating layer 43, the hot air branch pipe high temperature resistant castable layer 51 is correspondingly connected with the hot air main pipe high temperature resistant castable layer 52, the hot air branch pipe high temperature resistant compressible material layer 61 is correspondingly connected with the hot air main pipe high temperature resistant compressible material layer 62, and the hot air branch pipe spray coating 24 is correspondingly connected with the hot air main pipe spray coating 44, as shown in fig. 1 to 3.
In this embodiment, the hot air branch pipe working layer 21 and the hot air main pipe working layer 41 are built by adopting existing heavy refractory bricks, and are made of clay bricks, high-alumina bricks or andalusite bricks; the joint between the two is built by adopting a large block of combined bricks, and the material is the same as that of the working layer. The thickness of the working layer is typically between 100mm and 300 mm. The first heat-insulating layer 22 of the hot air branch pipe, the second heat-insulating layer 23 of the hot air branch pipe, the first heat-insulating layer 42 of the hot air main pipe and the second heat-insulating layer 43 of the hot air main pipe are all built by adopting the existing light heat-insulating bricks, and the materials are light clay bricks, light high-alumina bricks or the combination of the two light bricks. The hot blast branch pipe spray coating 24 and the hot blast main pipe spray coating 44 can be made of existing refractory paint.
In this embodiment, the high temperature resistant castable layer 5 forms a high temperature resistant and extrusion resistant integral structure outside the hot air branch pipe working layer 21 and the hot air main pipe working layer 41, so that a high temperature gas channel generated after the brick joint of the hot air branch pipe working layer 21 and the hot air main pipe working layer 41 is displaced due to extrusion of external force can be effectively plugged, and a protective shell is formed outside the hot air branch pipe working layer 21 and the hot air main pipe working layer 41, which is beneficial to the stability of the whole hot air pipeline three-fork lining structure.
Further, the heat insulation effect of the upper part of the whole hot air pipeline triple-fork lining is ensured by reserving the hot air branch pipe second heat insulation layer 23 and the hot air main pipe second heat insulation layer 43 between the high-temperature resistant castable layer 5 and the hot air branch pipe spray coating 24 as well as between the hot air main pipe spray coating 44, so that the temperatures of the hot air branch pipe steel shell 1 and the hot air main pipe steel shell 3 are not too high.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical characteristics and technical scheme, technical characteristics and technical scheme can be freely combined for use.
Claims (8)
1. The lining building structure of the hot air pipeline is characterized by comprising a working layer, a first heat preservation layer, a second heat preservation layer and a spray coating layer which are sequentially overlapped from inside to outside, wherein the lining building structure of the hot air pipeline is in a horizontal or inclined state, a high-temperature resistant pouring material layer (5) is arranged between the working layer and the second heat preservation layer, a high-temperature resistant compressible material layer (6) is arranged between the second heat preservation layer and the spray coating layer, and the high-temperature resistant pouring material layer (5) and the high-temperature resistant compressible material layer (6) are both positioned at the upper part of the lining building structure of the hot air pipeline;
the thickness of the high-temperature resistant castable layer (5) is the same as that of the first heat-preserving layer, and two ends of the high-temperature resistant castable layer (5) are correspondingly connected with two ends of the first heat-preserving layer along the circumferential direction of the lining building structure of the hot air pipeline; the inner diameter of the high-temperature-resistant compressible material layer (6) is equal to the outer diameter of the second heat preservation layer, and the thickness of the high-temperature-resistant compressible material layer (6) is less than one half of the thickness of the spraying layer.
2. The lining construction structure of the hot air duct according to claim 1, wherein the lining construction structure of the hot air duct is in a horizontal state, and a central angle corresponding to the high-temperature resistant castable layer (5) is smaller than or equal to a central angle corresponding to the high-temperature resistant compressible material layer (6).
3. The lining construction structure of a hot air duct according to claim 2, characterized in that the central angle corresponding to the high temperature resistant castable layer (5) is 120 ° to 180 °, and the central angle corresponding to the high temperature resistant compressible material layer (6) is 120 ° to 180 °.
4. The hot air pipeline three-fork lining building structure is characterized by comprising a cylindrical hot air branch pipe lining (2) and a hot air main pipe lining (4), wherein the structure of the hot air branch pipe lining (2) and the structure of the hot air main pipe lining (4) are the same as those of the hot air pipeline lining building structure in claim 1, one end of the hot air branch pipe lining (2) is communicated with the hot air main pipe lining (4), and the central line of the hot air branch pipe lining (2) and the central line of the hot air main pipe lining (4) are in a horizontal state.
5. The hot air pipeline three-fork lining building structure according to claim 4, wherein in the hot air branch pipe lining (2), the working layer, the first heat-preserving layer, the second heat-preserving layer, the high-temperature-resistant castable layer (5), the high-temperature-resistant compressible material layer (6) and the spray coating in the hot air pipeline lining building structure are a hot air branch pipe working layer (21), a hot air branch pipe first heat-preserving layer (22), a hot air branch pipe second heat-preserving layer (23), a hot air branch pipe high-temperature-resistant castable layer (51), a hot air branch pipe high-temperature-resistant compressible material layer (61) and a hot air branch pipe spray coating (24) in sequence.
6. The hot air pipeline three-fork lining building structure according to claim 4, wherein in the hot air main pipe lining (4), the working layer, the first heat-preserving layer, the second heat-preserving layer, the high-temperature-resistant castable layer (5), the high-temperature-resistant compressible material layer (6) and the spray coating layer in the hot air pipeline lining building structure are a hot air main pipe working layer (41), a hot air main pipe first heat-preserving layer (42), a hot air main pipe second heat-preserving layer (43), a hot air main pipe high-temperature-resistant castable layer (52), a hot air main pipe high-temperature-resistant compressible material layer (62) and a hot air main pipe spray coating layer (44) in sequence.
7. The hot air pipe triple-fork internal lining building structure according to claim 4, wherein a center line of the hot air branch pipe lining (2) is perpendicular to a center line of the hot air main pipe lining (4), an inner diameter of the hot air branch pipe lining (2) is smaller than or equal to an inner diameter of the hot air main pipe lining (4), and an outer diameter of the hot air branch pipe lining (2) is smaller than or equal to an outer diameter of the hot air main pipe lining (4).
8. The hot air pipeline three-fork internal lining building structure according to claim 4, wherein the hot air branch pipe lining (2) is externally sleeved with a hot air branch pipe steel shell (1), the hot air main pipe lining (4) is externally sleeved with a hot air main pipe steel shell (3), the thickness of the high-temperature resistant castable layer (5) is 100-150 mm, and the thickness of the high-temperature resistant compressible material layer (6) is 10-50 mm.
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| CN109652603B (en) * | 2019-01-29 | 2021-01-15 | 中冶武汉冶金建筑研究院有限公司 | Semi-pouring type blast furnace hot blast stove pipeline and construction method thereof |
| CN113088604B (en) * | 2021-03-05 | 2022-11-11 | 唐钢国际工程技术股份有限公司 | Hot blast stove three-fork flat-joint masonry structure and process |
| CN114107587A (en) * | 2021-11-17 | 2022-03-01 | 郑州安耐克实业有限公司 | Sectional type three-fork masonry structure applied to hot air pipeline system of hot air furnace |
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