CN220288201U - Gas-channeling-preventing refractory brick for coal chemical gasification furnace and lining structure of gas-channeling-preventing refractory brick - Google Patents
Gas-channeling-preventing refractory brick for coal chemical gasification furnace and lining structure of gas-channeling-preventing refractory brick Download PDFInfo
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- CN220288201U CN220288201U CN202321626390.4U CN202321626390U CN220288201U CN 220288201 U CN220288201 U CN 220288201U CN 202321626390 U CN202321626390 U CN 202321626390U CN 220288201 U CN220288201 U CN 220288201U
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- 239000011449 brick Substances 0.000 title claims abstract description 140
- 238000002309 gasification Methods 0.000 title claims abstract description 41
- 239000003245 coal Substances 0.000 title claims abstract description 29
- 239000000126 substance Substances 0.000 title claims abstract description 27
- 239000004568 cement Substances 0.000 claims description 9
- 230000003628 erosive effect Effects 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract 1
- 239000011468 face brick Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The utility model relates to an anti-blow-by refractory brick for a coal chemical gasification furnace and a lining structure thereof, belonging to the technical field of coal chemical gasification furnaces. The refractory bricks are fan-shaped brick bodies, the matched grooves and convex strips are respectively arranged on the brick surfaces on two symmetrical sides of each fan-shaped brick body, the lining structure is formed by splicing and building a plurality of refractory bricks, and the matched grooves and convex strips between two adjacent refractory bricks are mutually clamped and positioned to form an anti-blow-by sealing structure. The utility model designs a gasification furnace lining structure formed by refractory bricks, which is characterized in that the erosion rate of high-speed air flow in a furnace to the convex grooves of the refractory brick body is slowed down and blocked, and the air flow is gradually redirected along brick joints, so that the kinetic energy of the air flow is weakened, the speed is changed slowly, part of kinetic energy is converted into static pressure energy, the erosion rate is changed slowly, the purpose of 'anti-blowby' is achieved, and the service cycle of the refractory bricks is prolonged, and the system is stable to operate.
Description
Technical Field
The utility model relates to the technical field of coal chemical gasification furnaces, in particular to an anti-blowby refractory brick for a coal chemical gasification furnace and a lining structure thereof.
Background
In a system of a 'coal water slurry pressurized gasification device' in the coal chemical industry, a gasification furnace is key core equipment of the whole flow, and the stable operation of the system depends on the operation condition of the gasification furnace. While the refractory lining of the combustion chamber is a key point of the gasifier, the stable operation of the whole system is in the operation period of the refractory lining from another point of view. In the gasification section of coal industry, although the gasification furnaces are of various types, the refractory brick lining gasification furnace at the present stage occupies a main flow mode, so that it is important to prolong the service period of the refractory lining and make the refractory lining be in a controllable plan, so that the stable operation of the refractory lining is the basis of long-period operation of the whole system, and not only can control and save a large amount of maintenance cost, but also can improve the equipment operation rate and the vehicle preparation rate.
The general structural form of the gasifier combustion chamber refractory lining is from inside to outside: thermal face bricks (high chrome bricks), backing bricks (low chrome bricks), and insulating bricks (AI) 2 O 3 Brick), vault heavy castable and compressible material. The running condition of the gasification furnace mainly depends on the running state of a hot-face brick layer (lining structure), if the hot-face brick layer is light in problem, the gasification furnace wall is overtemperature to enable the system to be adjusted in a reducing way, and if the hot-face brick layer is heavy in problem, the hot-face brick layer is burnt through the furnace wall to generate accidents. The hot face brick layer of the gasification furnace is in a high temperature reaction environment in the straight face furnace, and the hot face brick is unavoidable in long-term operation under the environment of high temperature, slag and air flow flushingAnd damage is generated to affect operation. In the operation practice and maintenance inspection, the damage modes of the hot-face brick layers are compared, and the damage caused by air flow scouring corrosion is higher than that of other damages. As can be seen from the inspection and measurement of each system stop, the actual running brick surface has low erosion rate, but the erosion degree at the brick joint is more serious. When the refractory bricks are built, the cement is used for bonding, the cement has larger defects in the aspects of density and porosity after sintering and the combination of the cement and bricks, and has larger differences in slag erosion resistance and scouring resistance compared with the refractory bricks. The reaction flow field in the furnace is complex in operation, solid particles which are not completely combusted are wrapped by high-speed air flow to wash the brick surface and brick joints, and the brick joints are weak points of the whole lining, such as the brick joints are large, cement is not fully lapped, and the gaps are easily washed out gradually by the air flow at the moment (the vertical joint washing is mainly due to the characteristics of the flow field in the furnace), in particular to a high-temperature area or an air flow turbulent area in the furnace, such as a top-spraying cone bottom part between a dome of a four-spraying opposite gasifier, an upper expansion joint and a lower expansion joint. The air flow continuously flushes the brick joints along with long-period running to generate holes, and extends into the brick joints along with the cement, so that the thinning heat of the lining is discharged to cause the overtemperature of the furnace wall, the brick joints are eroded seriously to form hidden operational troubles, and the heat preservation effect of the lining is greatly influenced
Disclosure of Invention
In order to solve the problems in the prior art, the utility model designs the anti-blowby refractory brick and the lining structure for the coal chemical gasification furnace, so as to solve the problems that the brick joint is seriously corroded and damaged after the lining structure of the existing coal chemical gasification furnace runs for a long time, and the service life of the gasification furnace is influenced.
The technical scheme adopted by the utility model is to provide the anti-blow-by refractory brick for the coal chemical gasification furnace, the refractory brick is a fan-shaped brick body, and the symmetrical two brick surfaces of the fan-shaped brick body are respectively provided with the matched grooves and the matched raised strips.
Further, the refractory brick is a barrel brick, the left and right brick surfaces of the barrel brick are respectively vertically provided with a groove and a raised line which are matched with each other, and the grooves and the raised lines are positioned at the same radial positions of the left and right sides of the brick body.
Further, the refractory brick is an arch brick, the thickness of the brick body of the arch brick is gradually increased from inside to outside, the brick surfaces on the upper side and the lower side of the arch brick are respectively provided with a groove and a raised line which are matched with each other, the grooves and the raised lines are arc-shaped concentric with the brick surfaces on the inner side and the outer side of the brick body, and the radiuses of the grooves and the raised lines are the same.
Further, the positions of the grooves and the raised strips are located at the position which is one third of the length of the brick body from the inner brick surface of the brick body.
On the basis, the utility model provides a lining structure for a coal chemical gasification furnace, which is formed by splicing a plurality of layers of refractory bricks, wherein adjacent refractory bricks are bonded through a cement layer, a cylindrical barrel part of the lining structure is formed by splicing a plurality of barrel bricks as described above, and grooves and convex strips of left and right adjacent barrel bricks forming the barrel part are mutually clamped.
Further, the vault part of the lining structure is formed by splicing a plurality of arch bricks, and grooves and raised strips of upper adjacent arch bricks and lower adjacent arch bricks forming the vault part are mutually clamped.
Compared with the prior art, the anti-blowby refractory brick for the coal chemical gasification furnace and the lining structure thereof, which are designed by the utility model, have the advantages that: the symmetrical masonry surfaces of the refractory bricks are respectively provided with the matched convex strips and grooves, when the refractory bricks are used for masonry of the vault of the gasification furnace and the refractory lining hot-face brick layer of the cylinder, the bricks are matched and masonry is carried out through the convex strips and the grooves, radial circumferential thermal expansion is not affected when the lining is heated, and meanwhile, the convex strips and the grooves can play a role in positioning during masonry construction, so that the construction is facilitated, the radial dimension is ensured, and the construction difficulty is not increased. Because the erosion resistance of the refractory brick body is stronger than that of the cement, the erosion rate of the refractory brick joint line of the refractory lining from high-speed air flow to the raised line is slowed down and blocked, and the joint line is gradually redirected, so that the kinetic energy of the air flow is weakened, the speed is changed slowly, part of the kinetic energy is converted into static pressure energy, the erosion rate is changed slowly, the purpose of 'preventing gas blow-by' is achieved, and the service cycle of the refractory brick is prolonged, and the system is stable to operate.
Drawings
FIG. 1 is a schematic diagram of a structure of an anti-blow-by refractory brick for a coal chemical gasification furnace as a barrel brick according to the present utility model.
FIG. 2 is a schematic diagram of the structure of the gas blow-by preventing refractory brick for the coal chemical gasification furnace as an arched roof brick.
FIG. 3 is a schematic longitudinal sectional view of the lining structure for the gasification furnace of coal chemical industry according to the present utility model.
FIG. 4 is a schematic cross-sectional view of a cylindrical body of a lining structure for a coal chemical gasification furnace according to the present utility model.
In the figure, 1 barrel brick, 2 arched roof brick, 3 sand grip, 4 recess, 5 barrel, 6 arched top, 7 lining structure.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific examples. The technical solutions in the embodiments of the present utility model are clearly and completely described, and the described embodiments are only some embodiments, but not all embodiments, of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model disclosed herein without departing from the scope of the utility model.
Example 1
As shown in FIG. 1, the utility model designs a first embodiment of an anti-blow-by refractory brick for a coal chemical gasification furnace, wherein the refractory brick in the embodiment is a cylindrical brick 1 for the cylindrical part of the gasification furnace, the brick body of the cylindrical brick 1 is in a fan shape, the width of the brick body is gradually increased from inside to outside, and the inner brick surface and the outer brick surface of the brick body are in concentric arc shapes. The left and right brick surfaces of the barrel brick 1 are correspondingly provided with a convex strip 3 and a concave groove 4 along the vertical direction respectively, the convex strip 3 and the concave groove 4 are semicircular, and are positioned at the same radial distance from the two sides of the brick body, and are about 1/3 of the brick body from the inner side surface of the brick body.
Example 2
As shown in fig. 2, the present utility model discloses a second embodiment of an anti-blow-by refractory brick for a gasification furnace in coal chemical industry, in which the refractory brick is a crown brick 2 for building a vault of the gasification furnace, the brick body of the crown brick 2 is also fan-shaped, the width of the brick body is gradually increased from inside to outside, and the thickness of the brick body is also gradually increased from inside to outside. The brick surfaces on the upper side and the lower side of the brick body of the arch brick 2 are respectively and correspondingly provided with a convex strip 3 and a groove 4. The raised strips 3 and the grooves 4 are semicircular, and are curved in an arc shape concentric with the inner and outer brick surfaces of the brick body, and the positions of the raised strips 3 and the grooves 4 are also about 1/3 of the length of the brick body close to the inner side surface of the brick body.
Example 3
As shown in fig. 3 and 4, the utility model designs an embodiment of a lining structure for a coal chemical gasification furnace, in this embodiment, a lining structure 7 is built by a plurality of layers of refractory bricks, and adjacent refractory bricks are bonded by a cement layer, wherein a cylindrical barrel part 5 of the lining structure is built by splicing a plurality of barrel bricks 1 as described in embodiment 1, and grooves 4 and convex strips 3 of left and right adjacent barrel bricks 5 forming the barrel part 5 are mutually clamped and positioned; the dome portion 6 of the lining structure 7 is formed by splicing a plurality of crown bricks 2 as described in embodiment 2, and grooves and convex strips of upper and lower adjacent crown bricks 2 constituting the dome portion 6 are mutually engaged and positioned. When the lining structure is built, the convex strips and the grooves of the cylinder body and the vault refractory bricks are matched and built according to the technical requirements of the building construction of the gasification furnace, and the slurry with the size of 1.2-1.5mm is fully and naturally extruded, so that the defect that the slurry is uneven, not fully lapped and the like can be prevented from causing air flow channeling.
The foregoing is merely illustrative of the present utility model and is not intended to limit the scope of the utility model, i.e., all such modifications and variations are within the scope of the utility model as defined in the appended claims and their equivalents.
Claims (6)
1. The gas-channeling-preventing refractory brick for the coal chemical gasification furnace is characterized in that the refractory brick is a fan-shaped brick body, and the symmetrical two brick surfaces of the fan-shaped brick body are respectively provided with a groove and a convex strip which are matched with each other.
2. The gas channeling-preventing refractory brick for a coal chemical gasification furnace according to claim 1, wherein the refractory brick is a cylindrical brick, and the brick surfaces on the left and right sides of the cylindrical brick are respectively provided with a groove and a convex strip which are matched vertically, and the grooves and the convex strips are positioned at the same radial position on the left and right sides of the brick body.
3. The gas channeling-preventing refractory brick for a coal chemical gasification furnace according to claim 1, wherein the refractory brick is an arch brick, the thickness of the brick body of the arch brick gradually increases from inside to outside, the brick surfaces on the upper side and the lower side of the arch brick are respectively provided with a groove and a raised strip which are matched with each other, the grooves and the raised strips are arc-shaped concentric with the brick surfaces on the inner side and the outer side of the brick body, and the radiuses of the grooves and the raised strips are the same.
4. A gas blow-by preventing refractory for a coal chemical gasification furnace according to claim 2 or 3, wherein the grooves and ridges are located one third of the length of the brick from the inner face of the brick.
5. The lining structure for the coal chemical gasification furnace is formed by splicing a plurality of layers of refractory bricks, and adjacent refractory bricks are bonded through a cement layer, and is characterized in that a cylindrical barrel part of the lining structure is formed by splicing a plurality of anti-blowby refractory bricks for the coal chemical gasification furnace according to claim 2, and grooves and convex strips of left and right adjacent barrel bricks forming the barrel part are mutually clamped.
6. The lining structure for a coal chemical gasification furnace according to claim 5, wherein the crown portion of the lining structure is formed by splicing a plurality of gas-channeling-preventing refractory bricks for the coal chemical gasification furnace according to claim 3, and grooves and convex strips of upper and lower adjacent crown bricks forming the crown portion are mutually clamped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321626390.4U CN220288201U (en) | 2023-06-26 | 2023-06-26 | Gas-channeling-preventing refractory brick for coal chemical gasification furnace and lining structure of gas-channeling-preventing refractory brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321626390.4U CN220288201U (en) | 2023-06-26 | 2023-06-26 | Gas-channeling-preventing refractory brick for coal chemical gasification furnace and lining structure of gas-channeling-preventing refractory brick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220288201U true CN220288201U (en) | 2024-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321626390.4U Active CN220288201U (en) | 2023-06-26 | 2023-06-26 | Gas-channeling-preventing refractory brick for coal chemical gasification furnace and lining structure of gas-channeling-preventing refractory brick |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220288201U (en) |
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2023
- 2023-06-26 CN CN202321626390.4U patent/CN220288201U/en active Active
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