CN111895789A - Large horizontal high-temperature tubular shakeproof furnace lining and manufacturing method thereof - Google Patents

Large horizontal high-temperature tubular shakeproof furnace lining and manufacturing method thereof Download PDF

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Publication number
CN111895789A
CN111895789A CN202010894367.8A CN202010894367A CN111895789A CN 111895789 A CN111895789 A CN 111895789A CN 202010894367 A CN202010894367 A CN 202010894367A CN 111895789 A CN111895789 A CN 111895789A
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CN
China
Prior art keywords
resistant
insulating layer
wear
light heat
layer
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
Application number
CN202010894367.8A
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Chinese (zh)
Inventor
申青龙
吴锡培
朱明华
麻华军
刘江
周志强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUIYANG MINGTONG FURNACE CHARGE CO Ltd
Original Assignee
GUIYANG MINGTONG FURNACE CHARGE CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GUIYANG MINGTONG FURNACE CHARGE CO Ltd filed Critical GUIYANG MINGTONG FURNACE CHARGE CO Ltd
Priority to CN202010894367.8A priority Critical patent/CN111895789A/en
Publication of CN111895789A publication Critical patent/CN111895789A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/0003Linings or walls
    • F27D1/0006Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/14Supports for linings
    • F27D1/141Anchors therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/16Making or repairing linings increasing the durability of linings or breaking away linings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/16Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1621Making linings by using shaped elements, e.g. bricks

Abstract

The invention discloses a large horizontal high-temperature tubular anti-vibration furnace lining which comprises a furnace body steel shell, a light heat-insulating layer, a wear-resistant refractory plastic inner lining layer and a metal riveting piece, wherein the furnace body steel shell is a heat-resistant metal cylinder, the heat-insulating layer is fixed on the inner side of the steel shell through masonry, the inner lining layer is fixed and built on the inner side of the light heat-insulating layer through the metal riveting piece, one end of the metal riveting piece is fixedly connected with the furnace body steel shell, and the other end of the metal riveting piece penetrates through the light heat-insulating layer and extends into the inner lining layer to firmly hang a furnace body. The invention also discloses a manufacturing method of the furnace lining, which comprises the following steps: riveting one end of the metal riveting piece to the steel shell; building high-strength light insulating bricks into rings along the inner circumferential surface of the steel shell by using refractory insulating mortar to form an insulating layer; and laying the inner liner layer on the surface of the heat-insulating layer, and enabling the metal riveting piece to penetrate through the inner liner layer, so that the steel shell, the heat-insulating layer and the inner liner layer are connected into an organic whole. Obviously improves the stability and the vibration resistance of the furnace lining structure and greatly prolongs the service life of the furnace lining.

Description

Large horizontal high-temperature tubular shakeproof furnace lining and manufacturing method thereof
Technical Field
The invention relates to a high-temperature resistant furnace lining, in particular to a large horizontal high-temperature tubular anti-vibration furnace lining and a manufacturing method thereof.
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 furnace lining in the prior art is built by adopting a refractory brick and calcium silicate board mode, and the local over-temperature of the high-temperature air intake pipe is red due to the fact that the upper brick body of the air intake pipe is loosened and falls off, so that the furnace lining is forced to be stopped for maintenance.
Due to the influence of a top furnace body steel shell, arch smashing and firmness cannot be realized, the supporting function of the arch top cannot be effectively exerted, and the bearing capacity is reduced. The back cushion layer is made of light heat-insulating materials, the strength of the back cushion layer is limited, the supporting strength of the arch springing cannot be guaranteed, and in a vibration environment, the light heat-insulating materials can retreat under the action of external force to cause instability of the arch springing, further influence the stability of the arch crown and cause the arch crown to loosen and fall off. The heat insulation material is influenced by a high-temperature environment in the operation, heating wires with different degrees shrink, and then the inner ring working lining is wholly sunk to form a large-amplitude backseat of an arch springing supporting point, so that the structure of a working layer is damaged, masonry cracks appear, high-temperature smoke seeps into the heat insulation material further burned with the light heat insulation layer, and the arch crown is collapsed and falls off due to the circulation, and the lining is damaged. The vault position does not have the measure of hanging, only relies on self intensity to support, and the vault also is volatile steadily to collapse.
Disclosure of Invention
In view of the above, the invention aims to provide a large horizontal high-temperature tubular vibration-proof furnace lining with good vibration-proof effect, high temperature resistance and long service life
According to one aspect of the invention, the large horizontal high-temperature tubular anti-vibration furnace lining comprises a furnace body steel shell, a light heat-insulating layer, a wear-resistant, fire-resistant and plastic inner lining layer and a metal riveting piece, wherein the furnace body steel shell is a cylinder body, the light heat-insulating layer is fixedly connected to the inner side of the furnace body steel shell, the wear-resistant, fire-resistant and plastic inner lining layer is fixedly connected to the inner side of the light heat-insulating layer, one end of the metal riveting piece is fixedly connected with the furnace body steel shell, and the other end of the metal riveting piece penetrates through the light heat-insulating layer and extends into the.
In some embodiments, the metal rivets are provided in a plurality and are arranged in a uniform array.
In some embodiments, the two metal rivets are arranged in parallel in a group, and the parts of the two metal rivets which are arranged in parallel and extend into the wear-resistant and fire-resistant plastic lining layer are arranged in a split manner.
In some embodiments, the light-weight heat-insulation layer comprises a plurality of high-strength light-weight heat-insulation bricks, and the high-strength light-weight heat-insulation bricks are connected into an integral structure by adopting refractory heat-insulation mortar between two adjacent high-strength light-weight heat-insulation bricks.
In some embodiments, the thickness of the light heat-insulating layer is 115mm or 230mm, and national standard brick types are fully utilized, so that the heat-insulating requirement of a furnace lining is met, and the index requirements of energy conservation and consumption reduction are improved. The thickness of the wear-resistant refractory plastic lining layer is 120-200mm, so that the process requirement of the furnace lining is fully met, and the economical efficiency and the reliability of the furnace lining are improved.
According to another aspect of the invention, a manufacturing method of a large horizontal high-temperature tubular vibration-resistant furnace lining is provided, which comprises the following steps:
s1, riveting one end of the metal riveting piece to the furnace body steel shell;
s2, building high-strength light insulating bricks into a ring along the inner circumferential surface of the steel shell of the furnace body by using refractory insulating mortar to form a light insulating layer;
and S3, laying the wear-resistant and fire-resistant plastic inner lining layer on the surface of the light heat-insulating layer, and enabling the metal riveting piece to penetrate through the light heat-insulating layer.
In some embodiments, steps S1 and S2 are performed alternately, and a circle of high-strength lightweight insulating bricks is built, and a circle of metal rivets is made, and the above steps are repeated.
In some embodiments, the wear-resistant refractory material layer is constructed using a wear-resistant refractory plastic.
In some embodiments, the step 3) further comprises the steps of: pouring the wear-resistant refractory plastic into a stirrer, uniformly stirring, adding a curing agent, uniformly stirring, discharging for later use, smearing and ramming the surface of the light heat-insulating layer along the surface of the light heat-insulating layer of the barrel from bottom to top, then performing surface trowelling, performing natural curing for 48h, and baking and dehydrating to form a firm and smooth wear-resistant refractory material layer.
The invention has the beneficial effects that: the furnace body box hat is the heat-resisting metal barrel, and the heat preservation is fixed in the inboard of box hat through building by laying bricks or stones, and wear-resisting plastic refractory inner liner is fixed and is built by laying bricks or stones in the inboard of light heat preservation through metal riveting piece, and the one end and the furnace body box hat fixed connection of metal riveting piece, the other end of metal riveting piece run through the light heat preservation and stretch into inside wear-resisting plastic refractory inner liner, firmly hang the furnace body on the furnace body box hat. Selecting a proper heat-resistant stainless steel riveting structure for structural optimization design, respectively selecting special wear-resistant and fire-resistant plastic materials with different thicknesses and special matched light heat-insulating bricks to construct vault according to different environmental parameters at each part of the large horizontal high-temperature tubular anti-vibration furnace lining, and constructing high-strength light heat-insulating bricks into rings along the inner circumferential surface of the steel shell by using fire-resistant heat-insulating mortar to form a heat-insulating layer; and laying the wear-resistant refractory plastic inner liner on the surface of the heat-preservation layer, and enabling the metal riveting piece to penetrate through the heat-preservation layer. A structure reinforced by heat-resistant stainless steel is adopted, all parts of the tertiary air pipe are comprehensively transformed to obtain a large horizontal high-temperature tubular anti-vibration furnace lining, and a furnace body steel shell, a light heat-insulating layer and a wear-resistant, fire-resistant and plastic inner lining layer are connected into an organic whole. The vibration resistance of the large horizontal high-temperature tubular vibration-resistant furnace lining is obviously improved, and the service life of the air pipe is greatly prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a large horizontal high-temperature tubular vibration-resistant furnace lining according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional structural view of the large horizontal high-temperature tubular vibration-resistant furnace lining shown in FIG. 1.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
Example 1
Fig. 1 and 2 schematically show a large horizontal high-temperature tubular vibration-resistant furnace lining according to an embodiment of the invention.
Referring to fig. 1 and 2, the large horizontal high-temperature tubular anti-vibration furnace lining comprises a furnace body steel shell 1, a light insulating layer 2, a wear-resistant refractory plastic lining layer 3 and a metal riveting piece 4. Furnace body box hat 1 is the tubular construction, and 2 fixed connection in the inboard of furnace body box hat 1 encircle furnace body box hat 1 inboard, and 3 fixed connection in the inboard of light heat preservation 2 of wear-resisting plastic-refractory inner liner encircle 2 inboard hollow air passing passageways that form of light heat preservation 2. One end and 1 fixed connection of furnace body box hat of metal riveting 4, the other end of metal riveting 4 runs through light heat preservation 2 and stretches into inside 3 of wear-resisting plastic inner liner of fire resistance. The diameter of the furnace body steel shell 1 is 2000-4000 mm, the thickness of the light heat-insulating layer 2 is 115mm or 230mm, the thickness of the wear-resistant, fire-resistant and plastic inner lining layer 3 is 120-200mm, and the wear-resistant, fire-resistant and plastic inner lining layer can be adjusted according to the thickness of a furnace lining and the process requirement of a furnace and can be adjusted according to the process requirement of the furnace lining.
The light heat-insulating layer 2 comprises a plurality of high-strength light heat-insulating bricks 21, and fire-resistant heat-insulating mortar 22 is arranged between two adjacent high-strength light heat-insulating bricks 21 so as to connect the high-strength light heat-insulating bricks 21 into an integral structure. High-strength light insulating bricks 21 are laid into a ring along the inner circumferential surface of the steel shell by refractory insulating mortar 22 to form an insulating layer. The light heat-insulating layer lining adopts special high-quality high-strength light heat-insulating bricks to build the vault, the brick shapes 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 tertiary air duct, and the light heat-insulating layer lining is suitable for the requirement of the rapid overhaul of the tertiary air duct.
The metal riveting piece 4 is made of heat-resistant stainless steel, and the metal riveting piece 4 is provided with a plurality of metal riveting pieces. The 4 lug weld of metal rivets are at the internal surface of furnace roof furnace body box hat 1, pass the inside that light heat preservation 2 directly stretched into wear-resisting plastic refractory inner liner 3, fix wear-resisting plastic refractory inner liner 3 tightly on furnace roof furnace body box hat, and then make light heat preservation 2 obtain further reinforcement, form complete heat preservation, abrasionproof, alkali erosion resistance and the excellent integrated configuration of anti-seismic performance to improve the whole result of use and the life of cubic tuber pipe.
The wear-resistant and plastic-refractory lining layer 3 can be made of corundum-mullite wear-resistant and plastic-refractory material, and the corundum-mullite wear-resistant and plastic-refractory 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, is uniform in wear and long in service life, and is suitable for being used as a special wear-resistant material for a cement kiln tertiary air duct, a medium-high temperature air intake duct and a large boiler air flue duct wear-resistant lining.
The metal riveting pieces 4 are arranged in parallel in a group, and the parts of the two parallel metal riveting pieces 4 extending into the wear-resistant refractory plastic lining layer 3 are arranged in a split manner. The riveting binding force of the metal riveting piece 4 on the wear-resistant refractory plastic inner liner 3 can be enhanced, and the overall strength of the air pipe is enhanced.
The thickness of the light heat-insulating layer 2 is 115mm or 230mm, the national standard brick type is fully utilized, the heat-insulating requirement of a furnace lining is met, and the index requirements of energy conservation and consumption reduction are improved. The thickness of the wear-resistant refractory plastic lining layer is 120-200mm, so that the process requirement of the furnace lining is fully met, and the economical efficiency and the reliability of the furnace lining are improved.
Example 2
The utility model provides a manufacturing method suitable for above-mentioned large-scale horizontal high temperature tubular shakeproof furnace wall, include following step:
s1, riveting or welding one end of a metal riveting piece 4 to the furnace body steel shell 1, wherein one metal riveting piece 4 adopts two parallel fire-resistant stainless steel strips;
s2, building a ring of high-strength light insulating bricks 21 along the inner circumferential surface of the furnace body steel shell 1 by using refractory insulating mortar 22 to form a light insulating layer 2;
and S1 and S2 are alternately constructed, namely a circle of high-strength light-weight insulating bricks 21 are built, a circle of metal riveting pieces 4 are manufactured, and the process is circulated until the inner wall of the whole furnace body steel shell 1 is fully distributed.
S3, paving the wear-resistant and fire-resistant plastic inner liner layer 3 on the surface of the light heat-insulating layer 2, and bending the other end of the metal riveting piece 4 into a V shape and positioning the other end in the wear-resistant and fire-resistant plastic inner liner layer 3.
The wear-resistant refractory material layer 3 is constructed by adopting a high-strength wear-resistant refractory plastic material or a corundum-mullite wear-resistant refractory plastic material which is developed and produced by the company and has a special technology.
The step 3) further comprises the following steps: pouring the wear-resistant refractory plastic into a stirrer, uniformly stirring, adding a curing agent, uniformly stirring, discharging for later use, smearing and ramming the surface of the light heat-insulating layer 2 along the surface of the light heat-insulating layer of the barrel from bottom to top, then performing surface trowelling, performing natural curing for 48h, and forming a firm and smooth wear-resistant refractory material layer 3 after baking and dehydration.
The light heat-insulating layer lining of the large horizontal high-temperature tubular anti-vibration furnace lining adopts special high-quality high-strength light heat-insulating bricks to build the vault, 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 tertiary air duct, and the lining is suitable for the requirement of the rapid overhaul of the tertiary air duct.
The heat-resistant stainless steel is riveted and directly welded on the inner surface of the steel shell of the furnace top furnace body, the wear-resistant and fire-resistant plastic inner liner layer 3 is directly stretched into the light heat-insulating layer, the wear-resistant and fire-resistant plastic inner liner layer 3 is tightly fixed on the steel shell of the furnace top furnace body, and then the light heat-insulating layer is further reinforced to form a complete combined structure with excellent heat-insulating, wear-resistant, alkali corrosion-resistant and anti-seismic performances, so that the overall use effect and the service life of the large horizontal high-temperature tubular anti-seismic furnace liner are improved.
The invention is an optimization technology of the lining structure of the tertiary air duct, which is suitable for the application of the tertiary air duct and is also suitable for other large-scale horizontal high-temperature resistant tubular furnaces and kilns. The integrity of the lining structure of the tertiary air pipe of the large-scale dry-method cement kiln is effectively improved, the construction efficiency of the construction of the suspended ceiling hung upside down on the furnace top is effectively improved, the comprehensive benefits of abrasion resistance and heat preservation are completely considered, and the good heat-resistant stainless steel riveting structure provides enough support for the structural stability of the abrasion-resistant heat-preservation lining, so that the use effects of the wear-resistant material and the heat-preservation material of the tertiary air pipe system are improved, and the operation reliability of the system is further improved.
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. The large horizontal high-temperature tubular anti-vibration furnace lining is characterized by comprising a furnace body steel shell (1), a light heat-insulating layer (2), a wear-resistant plastic-refractory inner liner (3) and metal riveting pieces (4), wherein the furnace body steel shell (1) is a cylinder body, the light heat-insulating layer (2) is fixedly connected to the inner side of the furnace body steel shell (1), the wear-resistant plastic-refractory inner liner (3) is fixedly connected to the inner side of the light heat-insulating layer (2), one end of each metal riveting piece (4) is fixedly connected with the furnace body steel shell (1), and the other end of each metal riveting piece (4) penetrates through the light heat-insulating layer (2) and stretches into the wear-resistant plastic-refractory inner liner (3).
2. The large horizontal high-temperature tubular vibration-resistant furnace lining according to claim 1, wherein the metal riveting pieces (4) are arranged in a plurality of numbers and are uniformly arranged.
3. The large horizontal high-temperature tubular anti-vibration furnace lining according to claim 2, wherein the two metal riveting pieces (4) are arranged in parallel in a group, and the parts of the two parallel metal riveting pieces (4) extending into the wear-resistant refractory plastic lining layer (3) are arranged in a split manner.
4. The large horizontal high-temperature tubular vibration-resistant furnace lining according to claim 1, 2 or 3, wherein the light heat-insulating layer (2) comprises a plurality of high-strength light heat-insulating bricks (21), and the high-strength light heat-insulating bricks (21) are connected into an integral structure by adopting refractory heat-insulating mortar (22) between two adjacent high-strength light heat-insulating bricks (21).
5. The large horizontal high-temperature tubular vibration-resistant furnace lining as claimed in claim 4, wherein the thickness of the light heat-insulating layer (2) is 115mm or 230mm, and the thickness of the wear-resistant castable refractory lining layer (3) is 200mm, and can be adjusted according to the thickness of the furnace lining and the process requirements of a kiln.
6. The manufacturing method of the large horizontal high-temperature tubular anti-vibration furnace lining comprises the following steps:
s1, riveting one end of the metal riveting piece (4) to the furnace body steel shell (1);
s2, building high-strength light insulating bricks (21) into a ring along the inner circumferential surface of the furnace body steel shell (1) by using refractory insulating mortar (22) to form a light insulating layer (2);
s3, laying the wear-resistant and fire-resistant plastic inner lining layer (3) on the surface of the light heat-insulating layer (2), and enabling the metal riveting piece (4) to penetrate through the light heat-insulating layer.
7. The manufacturing method of the large horizontal high-temperature tubular vibration-resistant furnace lining according to claim 6, wherein the steps S1 and S2 are performed alternately, a circle of high-strength light-weight insulating bricks (21) are built, a circle of metal riveting pieces (4) are manufactured, and the steps are repeated.
8. The manufacturing method of the large horizontal high-temperature tubular vibration-resistant furnace lining according to claim 6, wherein the wear-resistant refractory material layer (3) is made of a wear-resistant refractory plastic material.
9. The method for manufacturing the large horizontal high-temperature tubular vibration-resistant furnace lining according to claim 8, wherein the step 3) further comprises the following steps: pouring the wear-resistant refractory plastic into a stirrer, uniformly stirring, adding a curing agent, uniformly stirring, discharging for later use, smearing and ramming the surface of the light heat-insulating layer (2) along the surface of the light heat-insulating layer of the barrel from bottom to top, then performing surface smoothing, naturally curing for 48h, and baking and dehydrating to form a firm and smooth wear-resistant refractory material layer (3).
CN202010894367.8A 2020-08-31 2020-08-31 Large horizontal high-temperature tubular shakeproof furnace lining and manufacturing method thereof Pending CN111895789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010894367.8A CN111895789A (en) 2020-08-31 2020-08-31 Large horizontal high-temperature tubular shakeproof furnace lining and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010894367.8A CN111895789A (en) 2020-08-31 2020-08-31 Large horizontal high-temperature tubular shakeproof furnace lining and manufacturing method thereof

Publications (1)

Publication Number Publication Date
CN111895789A true CN111895789A (en) 2020-11-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010894367.8A Pending CN111895789A (en) 2020-08-31 2020-08-31 Large horizontal high-temperature tubular shakeproof furnace lining and manufacturing method thereof

Country Status (1)

Country Link
CN (1) CN111895789A (en)

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