CN111750663A - Large horizontal tubular kiln - Google Patents
Large horizontal tubular kiln Download PDFInfo
- Publication number
- CN111750663A CN111750663A CN202010698262.5A CN202010698262A CN111750663A CN 111750663 A CN111750663 A CN 111750663A CN 202010698262 A CN202010698262 A CN 202010698262A CN 111750663 A CN111750663 A CN 111750663A
- Authority
- CN
- China
- Prior art keywords
- heat
- wear
- resistant
- layer
- steel shell
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 238000004873 anchoring Methods 0.000 claims abstract description 16
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 12
- 239000004033 plastic Substances 0.000 claims abstract description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 8
- 239000010935 stainless steel Substances 0.000 claims abstract description 8
- 239000011449 brick Substances 0.000 claims description 19
- 238000004321 preservation Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 12
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 239000010431 corundum Substances 0.000 claims description 4
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000009970 fire resistant effect Effects 0.000 claims description 2
- 239000003513 alkali Substances 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 230000035939 shock Effects 0.000 abstract description 6
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 15
- 238000009413 insulation Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/28—Arrangements of linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
- F27D1/06—Composite bricks or blocks, e.g. panels, modules
- F27D1/08—Bricks or blocks with internal reinforcement or metal backing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention relates to the technical field of large horizontal tubular kiln transformation, in particular to a large horizontal tubular kiln. The heat-insulating layer is made into a vault structure and attached to the inner wall of the steel shell, a wear-resistant layer made of corundum-mullite wear-resistant refractory plastic is bonded to the heat-insulating layer, an anchoring piece made of heat-resistant stainless steel is welded to the inner surface of the steel shell, one end of the anchoring piece is welded to the inner wall of the steel shell, and the other end of the anchoring piece penetrates through the heat-insulating layer and stretches into the inside of the wear-resistant layer to fix the heat-insulating layer and the wear-resistant layer on the inner wall of the steel shell. According to the invention, the anchoring piece is directly welded on the inner surface of the steel shell and directly extends into the wear-resistant layer through the heat-insulating layer, so that the wear-resistant lining is tightly fixed on the steel shell, the heat-insulating layer is further reinforced, and a complete combined structure with excellent heat-insulating, wear-resistant, alkali corrosion-resistant and shock-resistant properties is formed, thereby improving the overall use effect and prolonging the service life of the steel shell.
Description
Technical Field
The invention relates to the technical field of large horizontal tubular kiln transformation, in particular to a large horizontal tubular kiln.
Background
In a large-scale dry-method cement production line, a tertiary air pipe is an important device for recycling waste heat flue gas, is a large-scale horizontal tubular kiln, and has the main function that a large amount of high-temperature flue gas in a kiln head cover is sent back to a preheater and a decomposing furnace system to participate in cement preheating and decomposing process reaction, and along with the operation of a rotary kiln in the use process, vibration of different degrees often occurs, so that great influence is brought to the stability of a kiln lining. The original kiln lining is built by adopting a refractory brick and calcium silicate board mode, and the local over-temperature redness of the air intake duct is often caused by the loosening and falling of the brick body at the upper part of the air intake duct, so that the production is stopped and the maintenance is forced.
The main reasons for this are the following: the first and the horizontal tubular furnace lining vault masonry can not realize firm arch smashing due to the influence of a top steel shell, and the vault supporting function can not be effectively played, so that the bearing capacity is reduced.
And secondly, the vault of the horizontal tubular furnace lining is built, the back cushion layer is made of a light heat-insulating material, the strength is limited, the supporting strength of the arch foot cannot be ensured, and in a vibration environment, the light heat-insulating material can retreat under the action of external force to cause instability of the arch foot, further influence the stability of the vault and cause the vault to loosen and fall off.
Thirdly, the heat insulation material of the horizontal tubular furnace lining heat insulation layer is influenced by a high-temperature environment in operation, and has heating shrinkage in different degrees, so that the inner ring working lining is wholly sunk to form a large-amplitude backseat of an arch foot supporting point, the structure of a working layer is damaged, masonry cracks appear, high-temperature smoke permeates and further burns the heat insulation material with the heat insulation layer, and the arch crown is collapsed and falls off due to the circulation, and the furnace lining is damaged.
Fourthly, the vault part is not provided with a hanging measure and is supported only by the vault, and once the vault is unstable, the vault is inevitably collapsed in a large area, and further the shell of the tertiary air pipe turns red, so that the whole-line production halt maintenance is caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a large horizontal tubular kiln which is forced to stop production and overhaul due to the fact that the local part of an air taking pipe is over-heated and red because a brick body on the upper part of the air taking pipe is loosened and falls off.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a large-scale horizontal cast kiln, includes the box hat and adopts high-strength light insulating brick to build the heat preservation that forms by laying bricks or stones, the heat preservation make the vault structure attached in on the inner wall of box hat, it has the wearing layer that adopts the wear-resisting plastic refractory of corundum mullite to make to bond on the heat preservation, the internal surface welding of box hat has the anchor assembly that adopts heat-resisting stainless steel to make, the one end welding of anchor assembly is on the inner wall of box hat, and the other end passes the heat preservation just stretches into to inside the wearing layer, be used for with heat preservation and wearing layer are fixed on the inner wall of box hat.
The anchoring piece is of a Y-shaped structure and is divided into a first-shaped end and a V-shaped end, the first-shaped end is welded on the inner wall of the steel shell, and the V-shaped end extends into the wear-resistant layer.
The thickness of the heat-insulating layer is 476 mm.
The thickness of the wear-resistant layer is 460 mm.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the anchoring piece is directly welded on the inner surface of the steel shell and directly extends into the wear-resistant layer through the heat-insulating layer, so that the wear-resistant lining is tightly fixed on the steel shell, the heat-insulating layer is further reinforced, and a complete combined structure with excellent heat-insulating, wear-resistant, alkali erosion-resistant and shock-resistant properties is formed, thereby improving the overall use effect and prolonging the service life of the steel shell; the invention effectively improves the integrity of the large horizontal tubular kiln, effectively improves the construction efficiency of the construction of the suspended ceiling hung upside down on the furnace top, completely considers the comprehensive benefits of abrasion resistance and heat preservation, and provides enough support for the structural stability of the abrasion-resistant layer and the heat-preservation layer by the anchoring part structure made of good heat-resistant stainless steel materials, thereby improving the use effect of the abrasion-resistant layer and the heat-preservation layer of the invention and further improving the integral operation reliability; the wear-resistant layer is supported by the corundum-mullite wear-resistant refractory plastic material, and the corundum-mullite wear-resistant refractory plastic material has the characteristics of high strength, stripping resistance, no deformation, alkali corrosion resistance, excellent thermal shock resistance and the like, can bear high-temperature impact, has good alkali corrosion resistance, uniform wear and long service life, is convenient and quick to construct, is uniform and compact in construction body, does not need maintenance and baking, and is particularly suitable for construction of large horizontal tubular kilns of which the tops cannot be opened for construction. The heat-insulating layer is of a vault structure built by high-strength light heat-insulating bricks, the bricks are matched, the material is reasonable, the construction is convenient, the building stability is good, the high-temperature resistance completely meets the requirement of the working environment of the invention, and the heat-insulating layer is suitable for the requirement of quick maintenance of the invention.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a longitudinal cross-sectional view of the present invention;
fig. 3 is a partially enlarged view of fig. 2.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1-3, the large horizontal tubular kiln comprises a steel shell 1 and a heat insulation layer 2 built by high-strength light heat insulation bricks, wherein the heat insulation layer 2 is made into a vault structure and attached to the inner wall of the steel shell 1, a wear-resistant layer 3 made of corundum-mullite wear-resistant fire-resistant plastic is bonded on the heat insulation layer 2, an anchoring piece 4 made of heat-resistant stainless steel is welded on the inner surface of the steel shell 1, one end of the anchoring piece 4 is welded on the inner wall of the steel shell 1, and the other end of the anchoring piece 4 penetrates through the heat insulation layer 2 and extends into the wear-resistant layer 3 to fix the heat insulation layer 2 and the wear-resistant layer 3 on the inner wall of the steel shell 1. The high-strength light-weight insulating brick is a high-strength light-weight insulating brick, the insulating layer 2 is of a vault structure formed by building high-strength light-weight insulating bricks, the brick type is matched, the material is reasonable, the construction is convenient, the building stability is good, and the high-temperature resistance completely meets the requirement of the working environment of the high-strength light-weight insulating brick, so that the high-strength light-weight insulating brick is suitable for the requirement of quick maintenance of the high-strength light-weight insulating brick. The corundum-mullite wear-resistant refractory plastic material adopted by the wear-resistant layer 3 comprises 62-65% of aggregate, 30-35% of co-ground fine powder and 3-6% of binding agent; the aggregate comprises the following raw materials in percentage by weight: 90% of sintered corundum and 10% of mullite clinker; the co-ground fine powder comprises the following raw materials in percentage by weight: the wear-resistant layer 3 made of the sintered corundum 30-40%, the mullite clinker 54-65% and the composite additive 5-6% has the characteristics of high strength, stripping resistance, no deformation, alkali corrosion resistance, excellent thermal shock resistance and the like, can bear high-temperature impact, has good alkali corrosion resistance, uniform wear and long service life, is made of the corundum-mullite wear-resistant refractory plastic, is convenient and quick to construct, has uniform and compact construction bodies, does not need to be maintained and baked, and is particularly suitable for the construction of large horizontal kiln tubes of which the tops cannot be opened.
The anchoring piece 4 made of heat-resistant stainless steel is adopted, and the anchoring piece structure made of good heat-resistant stainless steel material provides enough support for the structural stability of the wear-resistant layer and the heat-insulating layer, so that the using effect of the wear-resistant layer and the heat-insulating layer is improved, and the integral operation reliability is further improved. The anchoring piece 4 is of a Y-shaped structure and is divided into a one-shaped end and a V-shaped end, the one-shaped end is welded on the inner wall of the steel shell 1, and the V-shaped end extends into the wear-resistant layer 3. In the invention, the end part of the one-shaped end is welded on the inner wall of the steel shell 1 and penetrates through the heat-insulating layer 2, and the V-shaped end is arranged in the wear-resistant layer 3, so that the structure among the steel shell 1, the heat-insulating layer 2 and the wear-resistant layer 3 can be stabilized.
In order to improve the heat insulating effect of the present invention, therefore, the thickness of the heat insulating layer 2 is set to 476 mm; the thickness of the wear resistant layer 3 is set to 460 mm. The purpose of this arrangement is primarily to improve the minimization of temperature losses of the wind passing through the invention and thereby improve the utility of the invention.
Specifically, the anchoring piece is directly welded on the inner surface of the steel shell and directly extends into the wear-resistant layer after penetrating through the heat-insulating layer, so that the wear-resistant lining is tightly fixed on the steel shell, the heat-insulating layer is further reinforced, and a complete combined structure with excellent heat-insulating, wear-resistant, alkali corrosion-resistant and shock-resistant properties is formed, so that the overall use effect and the service life of the steel shell are improved; the invention effectively improves the integrity of the large horizontal tubular kiln, effectively improves the construction efficiency of the construction of the suspended ceiling hung upside down on the furnace top, completely considers the comprehensive benefits of abrasion resistance and heat preservation, and provides enough support for the structural stability of the abrasion-resistant layer and the heat-preservation layer by the anchoring part structure made of good heat-resistant stainless steel materials, thereby improving the use effect of the abrasion-resistant layer and the heat-preservation layer of the invention and further improving the integral operation reliability; the wear-resistant layer is supported by the corundum-mullite wear-resistant refractory plastic material, and the corundum-mullite wear-resistant refractory plastic material has the characteristics of high strength, stripping resistance, no deformation, alkali corrosion resistance, excellent thermal shock resistance and the like, can bear high-temperature impact, has good alkali corrosion resistance, uniform wear and long service life, is convenient and quick to construct, is uniform and compact in construction body, does not need maintenance and baking, and is particularly suitable for construction of large horizontal tubular kilns of which the tops cannot be opened for construction. The heat-insulating layer is of a vault structure built by high-strength light heat-insulating bricks, the bricks are matched, the material is reasonable, the construction is convenient, the building stability is good, the high-temperature resistance completely meets the requirement of the working environment of the invention, and the heat-insulating layer is suitable for the requirement of quick maintenance of the invention.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (4)
1. A large-scale horizontal tubular kiln is characterized in that: include box hat (1) and adopt high-strength light insulating brick to build heat preservation (2) of forming by laying bricks or stones, heat preservation (2) are made the vault structure attached in on the inner wall of box hat (1), it has wearing layer (3) that adopt the wear-resisting fire-resistant plastic material of corundum mullite to make to bond on heat preservation (2), the internal surface welding of box hat (1) has anchor assembly (4) that adopt heat-resisting stainless steel to make, the one end welding of anchor assembly (4) is on the inner wall of box hat (1), and the other end passes heat preservation (2) and stretch into extremely inside wearing layer (3), be used for with heat preservation (2) and wearing layer (3) are fixed on the inner wall of box hat (1).
2. The large horizontal tube-type kiln according to claim 1, wherein: the anchoring piece (4) is of a Y-shaped structure and is divided into a one-shaped end and a V-shaped end, the one-shaped end is welded on the inner wall of the steel shell (1), and the V-shaped end extends into the wear-resistant layer (3).
3. The large horizontal tube-type kiln according to claim 1, wherein: the thickness of the heat-insulating layer (2) is 476 mm.
4. The large horizontal tube-type kiln according to claim 1, wherein: the thickness of the wear-resistant layer (3) is 460 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010698262.5A CN111750663A (en) | 2020-07-20 | 2020-07-20 | Large horizontal tubular kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010698262.5A CN111750663A (en) | 2020-07-20 | 2020-07-20 | Large horizontal tubular kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111750663A true CN111750663A (en) | 2020-10-09 |
Family
ID=72710636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010698262.5A Pending CN111750663A (en) | 2020-07-20 | 2020-07-20 | Large horizontal tubular kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111750663A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895789A (en) * | 2020-08-31 | 2020-11-06 | 贵阳明通炉料有限公司 | Large horizontal high-temperature tubular shakeproof furnace lining and manufacturing method thereof |
| CN113788694A (en) * | 2021-11-05 | 2021-12-14 | 浙江锦诚新材料股份有限公司 | Prefabricated part for cement kiln head cover and preparation method thereof |
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| US20110293365A1 (en) * | 2008-12-12 | 2011-12-01 | Vesuvius Crucible Company | Cement plant refractory anchor |
| CN202126166U (en) * | 2011-05-26 | 2012-01-25 | 醴陵友立特种陶瓷有限公司 | Rotary kiln |
| CN110822910A (en) * | 2019-12-24 | 2020-02-21 | 中钢集团洛阳耐火材料研究院有限公司 | Fireproof prefabricated brick for dynamic high-temperature furnace and building method thereof |
| CN111043606A (en) * | 2019-12-30 | 2020-04-21 | 青岛首鑫冶金辅料科技有限公司 | Furnace building method for hazardous waste treatment rotary kiln |
| CN212538737U (en) * | 2020-07-20 | 2021-02-12 | 贵阳明通炉料有限公司 | Large horizontal tubular kiln |
-
2020
- 2020-07-20 CN CN202010698262.5A patent/CN111750663A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010048087A (en) * | 1999-11-25 | 2001-06-15 | 이구택 | Refractory block for skid pipe of heating furnace and its manufacturing method |
| US20110293365A1 (en) * | 2008-12-12 | 2011-12-01 | Vesuvius Crucible Company | Cement plant refractory anchor |
| CN202126166U (en) * | 2011-05-26 | 2012-01-25 | 醴陵友立特种陶瓷有限公司 | Rotary kiln |
| CN110822910A (en) * | 2019-12-24 | 2020-02-21 | 中钢集团洛阳耐火材料研究院有限公司 | Fireproof prefabricated brick for dynamic high-temperature furnace and building method thereof |
| CN111043606A (en) * | 2019-12-30 | 2020-04-21 | 青岛首鑫冶金辅料科技有限公司 | Furnace building method for hazardous waste treatment rotary kiln |
| CN212538737U (en) * | 2020-07-20 | 2021-02-12 | 贵阳明通炉料有限公司 | Large horizontal tubular kiln |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895789A (en) * | 2020-08-31 | 2020-11-06 | 贵阳明通炉料有限公司 | Large horizontal high-temperature tubular shakeproof furnace lining and manufacturing method thereof |
| CN113788694A (en) * | 2021-11-05 | 2021-12-14 | 浙江锦诚新材料股份有限公司 | Prefabricated part for cement kiln head cover and preparation method thereof |
| CN113788694B (en) * | 2021-11-05 | 2022-07-22 | 浙江锦诚新材料股份有限公司 | Prefabricated part for cement kiln head cover and preparation method thereof |
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