CN213713911U - Tertiary air duct refractory brick and rotary kiln tertiary air duct - Google Patents
Tertiary air duct refractory brick and rotary kiln tertiary air duct Download PDFInfo
- Publication number
- CN213713911U CN213713911U CN202022757424.6U CN202022757424U CN213713911U CN 213713911 U CN213713911 U CN 213713911U CN 202022757424 U CN202022757424 U CN 202022757424U CN 213713911 U CN213713911 U CN 213713911U
- Authority
- CN
- China
- Prior art keywords
- brick
- air duct
- tertiary air
- firebrick
- heat insulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The utility model discloses a tertiary air duct refractory brick and a rotary kiln tertiary air duct, wherein the tertiary air duct refractory brick comprises a refractory brick base and a protruding part, and the protruding part is positioned on the cold end surface of the refractory brick base to form a T-shaped structure; and heat insulation blocks are respectively arranged on two sides of the protruding part, and the height of the protruding part is equal to that of the heat insulation blocks. The tertiary air duct refractory brick and the tertiary air duct of the rotary kiln can effectively prevent the top of the tertiary air duct of the rotary kiln from collapsing.
Description
Technical Field
The utility model relates to a rotary kiln specifically, relates to a resistant firebrick of cubic tuber pipe and rotary kiln cubic tuber pipe.
Background
At present, a novel dry kiln accounts for the mainstream of the cement industry, the novel dry kiln gradually becomes large, and a grate cooler also evolves from a second generation grate cooler and a third generation grate cooler to a fourth generation grate cooler; the development of the method is characterized in that the cooling efficiency and the heat recovery efficiency are continuously improved, so that the output of the kiln is continuously improved, the heat consumption is continuously reduced, the temperature of the corresponding secondary air and tertiary air is also continuously improved, along with the development of dry process technology and environmental protection requirements, the cement production line is gradually changed from single cement clinker production to the kiln for waste incineration and related harmful substances synergistic treatment, and meanwhile, the performance requirements on related refractory materials are also gradually improved.
With the technological improvement of the fourth generation grate cooler, the tertiary air temperature reaches about 1300 ℃ from within 1100 ℃, so that the air duct lining body bears the pressure of high-temperature thermal expansion stress, abrasion of flying sand materials, sulfur-alkali corrosion and the like, and the refractory bricks and the calcium silicate boards are subjected to long-term high temperature and large shrinkage deformation under brick lining pressure (the calcium silicate boards deform and shrink greatly at the temperature of over 1100 ℃), so that the brick lining is loosened, the arch crown of the brick ring loses support, and the top refractory bricks collapse in a large area.
According to the current use situation of the refractory material of the tertiary air pipe, the thickness of the refractory layer of the original structure design of the tertiary air pipe is 114mm, and the thickness of the heat insulation layer is 100 mm. When the lining is built, the calcium silicate plate close to the heat-insulating layer of the cylinder shell is made of light materials, the fire-resistant layer does not have a supporting point for acting force particularly on the lower semicircular part of the cylinder shell, effective arch force cannot be formed, and when the bricks are locked, the steel plate cannot be firmly pressed, and the masonry structure is not firm. After the refractory brick is used for a period of time, due to the fact that the refractory brick expands and contracts for many times, the rear heat-insulating layer is extruded and contracted, the kiln is opened and stopped for several times, the refractory brickwork expands and contracts, displacement can occur, the displacement is large, the top is further collapsed, and the original calcium silicate board and the high-strength alkali-resistant brick cannot meet the production requirements of the existing system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a resistant firebrick of tertiary tuber pipe and rotary kiln tertiary tuber pipe, this resistant firebrick of tertiary tuber pipe and rotary kiln tertiary tuber pipe can prevent the emergence of the phenomenon that the top of rotary kiln tertiary tuber pipe collapses effectively.
In order to achieve the above object, the present invention provides a tertiary air duct refractory brick, which comprises a refractory brick base and a protruding portion, wherein the protruding portion is located on a cold end surface of the refractory brick base to form a T-shaped structure; and heat insulation blocks are respectively arranged on two sides of the protruding part, and the height of the protruding part is equal to that of the heat insulation blocks.
Preferably, the material of the refractory brick base and the material of the refractory brick protruding part are respectively and independently selected from mullite or silicomullite.
Preferably, a chamfer is formed at the joint of the firebrick base and the projection.
Preferably, the width of the protrusion is 25-35 mm.
Preferably, the height of the refractory brick base and the heat insulation block is 110-120 mm.
Preferably, the width of the outermost end of the heat insulation block is 78-85mm, the width of the outermost end of the refractory brick base is 68-75mm, and the total height of the refractory brick base and the protrusion is 225-235 mm.
The utility model also provides a tertiary air pipe of the rotary kiln, which comprises the tertiary air pipe refractory brick; the rotary kiln tertiary air pipe comprises an annular brick lining layer and an annular heat insulation layer, and the heat insulation layer is sleeved outside the brick lining layer; the heat insulation layer is built by the heat insulation blocks, and the brick lining layer is built by the tertiary air duct refractory bricks.
Preferably, the tile lining comprises a first tile region and a second tile region, the first tile region being located above the second tile region and the first tile region having a thickness greater than the thickness of the second tile region.
Preferably, the radian of the first brick area is 230-.
Preferably, the thermal insulation block is made of a nano thermal insulation material.
In the technical scheme, the utility model provides a resistant firebrick of tertiary tuber pipe includes firebrick base and protruding portion, the both sides of protruding portion are provided with the heat insulating block respectively. The protruding part provides hard support with the thermoinsulating piece, avoids the insulating layer shrink brick to sink, and the height of protruding part is the same with the height of thermoinsulating piece, and is the same width with the brick, and the construction of being convenient for is built by laying bricks or stones.
The tertiary tuber pipe is able to bear or endure firebrick as the working layer, and the insulating barrier constitutes the insulating layer, each other is the interlock between working layer, the nanometer insulating layer, has effectively solved, can not effectively squeeze into the lock seam steel sheet in the tertiary tuber pipe bricklaying, causes the not tight problem of brick inlay, has better solved behind the high temperature of wind, and the calcium silicate board burns out, the problem that the brick collapses. The working layer and the nanometer thermal insulation layer form a double-layer composite lining body, and the double-layer composite lining body has the characteristics of compact structure, high overall strength, good wear resistance, scouring resistance, erosion resistance and good heat preservation and energy saving effects. Can be partially replaced under the condition of not influencing the upper and lower structure of the lining body, and is convenient to replace and disassemble. Meanwhile, the reasonable double-layer composite lining body has the characteristic of good thermal shock resistance stability, provides double insurance for resisting harsh environments such as frequent kiln shutdown, rapid cooling, rapid heating and expansion of the lining body and the like, and promotes the energy-saving and long-acting development of a new generation of functional refractory.
Therefore, the tertiary air duct refractory brick and the tertiary air duct of the rotary kiln effectively solve the problems of loose brick linings and brick spanning at the top caused by the extrusion and shrinkage of the tertiary air duct calcium silicate board under high temperature and brick linings; the problem that the loss of bottom bricks and top bricks of the tertiary air duct is asynchronous, so that the material is wasted during maintenance and replacement is effectively solved; the problem of weight increase of bricks is effectively solved while a new stable structure is provided; effectively solves the problems of insecure support and expansion and contraction. Therefore, the novel refractory brick can meet the new requirements of the refractory bricks for the tertiary air duct of the large-scale cement kiln, so that the overhaul and maintenance of the refractory bricks are reduced, the service life of the tertiary air duct refractory bricks is prolonged, the temperature of the air duct cylinder shell is reduced, the heat loss is reduced, the effective energy conservation and consumption reduction are achieved, the yield is guaranteed, and the benefit is increased.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
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 principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a preferred embodiment of a tertiary air duct of a rotary kiln provided by the present invention;
FIG. 2 is an enlarged view of the structure of the portion C in FIG. 1;
FIG. 3 is a schematic structural view of a preferred embodiment of a tertiary air duct refractory brick provided by the present invention;
FIG. 4 is a left side view of FIG. 3;
FIG. 5 is a left side view of FIG. 1;
FIG. 6 is a schematic structural diagram of a tertiary air duct of a rotary kiln in the prior art;
fig. 7 is a sectional view taken along the plane B-B of fig. 6.
Description of the reference numerals
1. Tertiary air duct firebrick 2 and heat insulation block
3. Refractory brick base 4, protruding part
5. First brick zone 6, insulating layer
7. Second brick area
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
In the present invention, unless otherwise specified, the terms "upper, lower, top, bottom" and the like are included in the terms in an orientation that represents only an orientation of the term in a conventional use state or a colloquial meaning understood by those skilled in the art, and should not be construed as limiting the term.
The utility model provides a tertiary air duct refractory brick, wherein the tertiary air duct refractory brick 1 comprises a refractory brick base 3 and a protrusion 4, and the protrusion 4 is positioned on the cold end surface of the refractory brick base 3 to form a T-shaped structure; the two sides of the protruding part 4 are respectively provided with a heat insulation block 2, and the height of the protruding part 4 is equal to that of the heat insulation block 2.
The tertiary air duct firebrick 1 comprises a firebrick base 3 and a protruding part 4, wherein heat insulation blocks 2 are respectively arranged on two sides of the protruding part 4. Protruding portion 4 provides hard support with thermoblock 2, avoids the insulating layer shrink brick to sink, and the height of protruding portion 4 is the same with thermoblock 2's height, and is the same with the brick width, and the construction of being convenient for is built by laying bricks or stones.
The refractory brick 1 of tertiary tuber pipe is as the working layer, and insulating block 2 constitutes the insulating layer, and each other is the interlock between working layer, the nanometer insulating layer, has effectively solved, can not effectively squeeze into the lock seam steel sheet in the tertiary tuber pipe bricklaying, causes the not tight problem of brick inlay, has better solved after the high temperature of wind, and the calcium silicate board burns out, the problem that the brick collapses. The working layer and the nanometer thermal insulation layer form a double-layer composite lining body, and the double-layer composite lining body has the characteristics of compact structure, high overall strength, good wear resistance, scouring resistance, erosion resistance and good heat preservation and energy saving effects. Can be partially replaced under the condition of not influencing the upper and lower structure of the lining body, and is convenient to replace and disassemble. Meanwhile, the reasonable double-layer composite lining body has the characteristic of good thermal shock resistance stability, provides double insurance for resisting harsh environments such as frequent kiln shutdown, rapid cooling, rapid heating and expansion of the lining body and the like, and promotes the energy-saving and long-acting development of a new generation of functional refractory.
In the present invention, the material of the firebrick base 3 and the projection 4 can be selected within a wide range, but in order to further improve the service life of the firebrick base 3 and the projection 4, it is preferable that the material of the firebrick base 3 and the projection 4 is each independently selected from mullite or silicomullite.
In the present invention, in order to further improve the degree of adhesion between the firebrick holder 3, the protruding portion 4, and the heat insulating block 2 three, preferably, a chamfer is formed at the junction of the firebrick holder 3 and the protruding portion 4. The corners of the heat insulation blocks 2 are matched with the chamfers, so that the installation stability of the heat insulation blocks 2 is effectively improved.
In the present invention, the width of the protrusion 4 may be selected within a wide range, but in order to reduce the heat conduction of the protrusion 4, it is preferable that the width of the protrusion 4 is 25 to 35 mm.
In the present invention, the size of the firebrick base 3 and the heat insulation block 2 can be selected in a wide range, but in order to improve the masonry effect, it is preferable that the height of the firebrick base 3 and the heat insulation block 2 is 110-120 mm.
In addition to the above embodiment, in order to further improve the bricking effect of the tertiary air duct firebrick 1, it is preferable that the width of the outermost end of the heat insulation block 2 is 78 to 85mm, the width of the outermost end of the firebrick base 3 is 68 to 75mm, and the total height of the firebrick base 3 and the projection 4 is 225 and 235 mm.
The utility model also provides a tertiary air pipe of the rotary kiln, which comprises the tertiary air pipe refractory brick 1; the rotary kiln tertiary air pipe comprises an annular brick lining layer and an annular heat insulation layer 6, and the heat insulation layer 6 is sleeved outside the brick lining layer; the heat insulation layer 6 is formed by building the heat insulation blocks 2, and the brick lining is formed by building the tertiary air duct refractory bricks 1. In the tertiary air pipe of the rotary kiln, the refractory bricks of the tertiary air pipe are used, so that the service life of the tertiary air pipe of the rotary kiln is effectively prolonged.
The utility model discloses in, in order to further improve the life of rotary kiln tertiary tuber pipe, preferably, the brick lining includes first brick district 5 and second brick district 7, first brick district 5 is located the top in second brick district 7, and the thickness in first brick district 5 is greater than the thickness in second brick district 7. Through optimizing the thickness of brick lining, divide into first brick district and second brick district with the brick lining layer, first brick district is located the top in second brick district to the thickness in first brick district is greater than the thickness in second brick district, alright make the brick lining loss of brick lining layer upper and lower two parts the same basically from this, has also prolonged the life in first brick district simultaneously, and then has avoidd the too early change in first brick district.
In the present embodiment, the following excellent effects are obtained:
1. the workload and the maintenance amount are reduced, and the construction cost generated in the maintenance process is reduced.
2. The thickness of the bottom brick is reduced (calculated by reducing 32 mm), the upper brick lining and the lower brick lining are synchronously replaced by 50m according to a period of five years of a tertiary air duct, 32.66t of refractory materials can be saved, the price of a refractory brick of the tertiary air duct is 4000 yuan/t, the purchasing cost of the refractory materials can be saved by 13.1 ten thousand yuan in each period, and if 150 kilns of the conch cement are designed according to the design, the purchasing cost of the refractory materials can be saved by 1965 ten thousand yuan, and the material waste is reduced.
3. The whole brick weight is reduced, the whole load of the shell is correspondingly reduced, and the service life of the shell can be correspondingly prolonged.
Similarly, the area occupied by the first brick zone 5 and the second brick zone 7 can be selected in a wide range, but in order to reduce workload and maintenance, prolong the service life of the brick lining and reduce the overall load, preferably, the radian of the first brick zone 5 is 230-.
In the above embodiment, the material of the heat insulation block 2 can be selected in a wide range, but in order to improve the heat insulation effect, preferably, the heat insulation block 2 is made of a nano heat insulation material, and the nano material can effectively reduce the temperature of the tertiary air duct shell by 50-60 ℃, so that the energy saving effect is remarkable.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (9)
1. A tertiary air duct refractory brick is characterized in that the tertiary air duct refractory brick (1) comprises a refractory brick base (3) and a protrusion (4), wherein the protrusion (4) is positioned on the cold end surface of the refractory brick base (3) to form a T-shaped structure; and heat insulation blocks (2) are respectively arranged on two sides of the protruding part (4), and the height of the protruding part (4) is equal to that of the heat insulation blocks (2).
2. The tertiary duct firebrick as claimed in claim 1, wherein the material of the firebrick base (3) and projections (4) are each independently selected from mullite or silicomullite.
3. A tertiary duct firebrick as claimed in claim 1, wherein the junction of the firebrick base (3) and the projection (4) is chamfered.
4. Tertiary air duct firebrick according to claim 1, characterized in that the width of the projection (4) is 25-35 mm.
5. The tertiary duct firebrick as claimed in claim 1, wherein the height of the firebrick base (3) and the insulating block (2) are each independently 110-120 mm.
6. Tertiary air duct firebrick according to any of claims 1 to 5, characterized in that the width of the outermost end of the insulating block (2) is 78-85mm, the width of the outermost end of the firebrick base (3) is 68-75mm, and the total height of the firebrick base (3) and the projection (4) is 225-235 mm.
7. A tertiary air duct of a rotary kiln, characterized in that the tertiary air duct of the rotary kiln comprises the tertiary air duct firebrick as claimed in any one of claims 1 to 6; the rotary kiln tertiary air pipe comprises an annular brick lining layer and an annular heat insulation layer (6), and the heat insulation layer (6) is sleeved outside the brick lining layer; the heat insulation layer (6) is formed by building heat insulation blocks (2), and the brick lining layer is formed by building tertiary air duct refractory bricks (1).
8. Rotary kiln tertiary air duct according to claim 7, characterized in that the brick lining comprises a first brick area (5) and a second brick area (7), that the first brick area (5) is located above the second brick area (7) and that the thickness of the first brick area (5) is greater than the thickness of the second brick area (7).
9. The tertiary air duct of the rotary kiln as claimed in claim 8, wherein the radian of the first brick zone (5) is 230-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022757424.6U CN213713911U (en) | 2020-11-23 | 2020-11-23 | Tertiary air duct refractory brick and rotary kiln tertiary air duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022757424.6U CN213713911U (en) | 2020-11-23 | 2020-11-23 | Tertiary air duct refractory brick and rotary kiln tertiary air duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213713911U true CN213713911U (en) | 2021-07-16 |
Family
ID=76783948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022757424.6U Active CN213713911U (en) | 2020-11-23 | 2020-11-23 | Tertiary air duct refractory brick and rotary kiln tertiary air duct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213713911U (en) |
-
2020
- 2020-11-23 CN CN202022757424.6U patent/CN213713911U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110822895B (en) | Fixed molten pool smelting furnace manufacturing process | |
| CN102241995A (en) | Dry quenching expansion joint firebrick structure construction technology | |
| CN201555453U (en) | Energy-saving brick and rotary kiln inside lining structure comprising thereof | |
| CN106595314A (en) | Rotary kiln liner structure and laying method | |
| CN201265017Y (en) | Blast furnace hearth furnace bottom lining structure | |
| CN213713911U (en) | Tertiary air duct refractory brick and rotary kiln tertiary air duct | |
| CN204594233U (en) | A kind of refractory brick dome structure of locking structure | |
| CN105924024A (en) | Fireproof brick for lining of limestone vertical kiln | |
| CN112595100A (en) | Tertiary air duct refractory brick and rotary kiln tertiary air duct | |
| CN202329164U (en) | Lining structure of reducibility ore-smelting electric furnace | |
| CN207945690U (en) | A kind of high-temperature furnace smoke pipeline with brick laying structure | |
| CN201901635U (en) | Expansion joint structure for big arch of glass furnace for pure oxygen combustion | |
| CN205740773U (en) | Limestone erects type inner lining of kiln refractory brick | |
| CN202182612U (en) | Lining structure of vertical lime pit | |
| CN202945214U (en) | Novel gasifier arch apex structure | |
| CN103387325B (en) | Insulation apparatus for glass tank furnace | |
| CN204461080U (en) | A kind of high-strength climbing prolongs formula double plate shell hasp furnace lining structure | |
| CN213300814U (en) | Tertiary air pipe for rotary kiln | |
| CN110906740A (en) | Ferronickel electric furnace with magnesium-carbon composite furnace lining | |
| CN201037731Y (en) | Structure integration high temperature kiln | |
| CN205245776U (en) | Rotary kiln's inside lining | |
| CN215063632U (en) | Energy-conserving kiln lining of modularization | |
| CN206683395U (en) | Tunnel cave vault construction | |
| CN218665895U (en) | Furnace door composite lining and coke oven | |
| CN217465365U (en) | Self-locking composite structure hanging brick for cement kiln grate cooler, kiln door cover and other parts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |