CN112856466A - Furnace smoke pipe inside lining - Google Patents
Furnace smoke pipe inside lining Download PDFInfo
- Publication number
- CN112856466A CN112856466A CN202110017127.4A CN202110017127A CN112856466A CN 112856466 A CN112856466 A CN 112856466A CN 202110017127 A CN202110017127 A CN 202110017127A CN 112856466 A CN112856466 A CN 112856466A
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- China
- Prior art keywords
- wear
- resistant
- tiles
- layer
- heat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
- F23J13/02—Linings; Jackets; Casings
- F23J13/025—Linings; Jackets; Casings composed of concentric elements, e.g. double walled
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
- F23J13/04—Joints; Connections
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a furnace smoke tube lining which comprises a shell, a heat insulating layer arranged on the inner side of the shell, a protective layer arranged on the inner side of the heat insulating layer and a wear-resistant layer arranged on the inner side of the protective layer, wherein the wear-resistant layer is formed by combining a plurality of wear-resistant tiles, the protective layer is provided with a plurality of recessed structures, a supporting block is arranged between two left and right adjacent wear-resistant tiles and is positioned at the recessed structures, and filling modules which expand with heat and contract with cold are filled in the recessed structures behind the supporting blocks. When the furnace smoke pipeline is in a high-temperature state, the filling module is subjected to thermal expansion to extrude the supporting block, and the supporting block is tightly supported between the left and right adjacent two wear-resistant tiles, so that the ring-shaped wear-resistant tiles are tightly supported to block and isolate high-temperature smoke in the furnace smoke pipeline and protect the long-term stability of a structure behind the wear-resistant layer.
Description
Technical Field
The invention relates to boiler equipment, in particular to smoke exhaust equipment of a boiler.
Background
The furnace flue is an important device for conveying media such as flue gas in the boiler industry. The lining of a smoke pipeline of a furnace in operation at present is usually of a composite structure with an internal heat insulation form and a steel shell on the outside, and the functional materials of the lining layer of the typical structure are usually a wear-resistant layer, a fire-resistant heat insulation layer, a heat insulation layer and the steel shell from inside to outside (the fire facing surface is the inner side).
The wear-resistant layer is divided into two common forms of wear-resistant castable and wear-resistant bricks.
The fire-resistant insulating layer is made of a medium fire-resistant insulating castable and the like.
The heat-insulating layer is made of light heat-insulating pouring material or high-strength fiberboard and the like.
The steel shell is used as a structural main body of the furnace smoke pipe, forms a closed channel and supports the lining material at the same time. The steel shell has metal anchoring parts, support plates and other structural parts to attach the lining material to the steel shell.
The inner lining of the furnace smoke tube formed by a series of inner lining structures has heavier self weight, needs to be added with water on site for stirring, maintained and dried, and has poor heat insulation effect again. Because the material with heavier volume weight (compared with the light heat-insulating material, such as rock wool, glass wool, aluminum silicate fiber products, calcium silicate heat-insulating products and the like) such as the medium-quality refractory heat-insulating castable, the light heat-insulating castable or the high-strength fiberboard is adopted, the self weight of the lining structure is heavier, the shape selection difficulty of the furnace smoke tube body supporting and guiding device is increased, the weight of a boiler steel frame is increased, and compared with the light heat-insulating material, the lining structure has poorer heat-insulating performance. Maintenance and oven are required after water is added for stirring, the measures increase the cost and the installation period of the whole furnace smoke pipe equipment, and the lining is easy to fail prematurely due to improper maintenance and oven. The thickness of the lining is 20-50% larger than that of the light heat-insulating material such as glass wool, rock wool, aluminum silicate fiber and the like, so that the overall external size of the furnace smoke tube equipment is increased, and certain difficulty is caused in arrangement of the furnace smoke tube equipment.
The invention content is as follows:
the technical problems solved by the invention are as follows: the high-temperature flue gas in the flue pipe of the furnace is blocked and isolated.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a stove tobacco pipe inside lining, includes the casing, set up at the inboard heat insulation layer of casing, set up at the inboard inoxidizing coating of heat insulation layer, set up at the inboard wearing layer of inoxidizing coating, the wearing layer is formed by the combination of a plurality of wear-resisting tiles, the inoxidizing coating is equipped with a plurality of sunk structures, it is equipped with the bracer to control between two adjacent wear-resisting tiles, the bracer is located sunk structure department, it has the packing module of expend with heat and contract with cold to fill in the sunk structure behind the brace.
The design of the sunken structure of the protective layer provides conditions for the arrangement of the filling module while the insulating layer is fixed on the inner side of the shell.
When the furnace smoke pipeline is in a high-temperature state, the filling module is subjected to thermal expansion, the supporting block is extruded, the supporting block is radially displaced along the furnace smoke pipeline and tightly supported between two left and right adjacent wear-resistant tiles, so that the circular ring-shaped wear-resistant tiles are tightly supported in a combined mode, high-temperature smoke in the furnace smoke pipeline is blocked and isolated, the long-term stability of the structure behind the wear-resistant layer is protected, the high-temperature smoke is prevented from scouring the structure behind the wear-resistant layer, the direct contact between a metal piece and the smoke is reduced, and possible corrosion is reduced.
Description of the drawings:
FIG. 1 is a perspective view of a portion of a flue tube liner of a furnace;
FIG. 2 is a view of the inner lining of the flue tube of FIG. 1 from the rear;
FIG. 3 is an exploded view of FIG. 2;
FIG. 4 is a plan view of a portion of the inner liner of a flue gas duct of a furnace.
The symbols in the drawings illustrate that:
10. a housing; 11. pulling up the arm; 12. a pin member; 13. a lower bracket;
20. a heat insulating layer;
30. a protective layer; 31. a recessed structure;
40. a wear layer; 41. wear resistant tiles; 411. a bevel; 42. a support block; 43. the boundary of two adjacent layers of wear-resistant tiles;
51. a filling module; 52. a heat preservation module;
60. and heating the surface.
The specific implementation mode is as follows:
with reference to fig. 1 and 4, a flue pipe lining for a furnace comprises a shell 10, a heat insulating layer 20 arranged on the inner side of the shell, a protective layer 30 arranged on the inner side of the heat insulating layer, a wear-resistant layer 40 arranged on the inner side of the protective layer, wherein the wear-resistant layer is formed by combining a plurality of wear-resistant tiles 41, the protective layer is provided with a plurality of recessed structures 31, supporting blocks 42 are arranged between two adjacent wear-resistant tiles on the left and right, the supporting blocks are positioned at the recessed structures, and filling modules 51 expanding with heat and contracting with cold are filled in the recessed structures behind the supporting blocks.
The invention adopts the pre-sintered wear-resistant tiles 41 and the supporting blocks 42 to form the wear-resistant layer 40, does not adopt wear-resistant bricks or wear-resistant castable, does not need to add water in the manufacturing and installation processes, and does not need to adopt the maintenance and baking processes aiming at refractory materials compared with the prior structure, thereby reducing the dead weight of the furnace smoke tube, avoiding baking the furnace, shortening the construction period and lowering the cost.
A plurality of wear-resistant tiles 41 are combined into a ring shape, a supporting block 42 is arranged between every two adjacent wear-resistant tiles, a concave structure 31 is arranged behind each supporting block, and the filling module 51 is filled in the concave structure. The high temperature flue gas is generated under the condition of high temperature, at the moment, the furnace smoke pipeline is in a high temperature state, all the filling modules 51 are heated and expanded, the corresponding supporting blocks 42 are extruded along the radial direction of the furnace smoke pipeline, and the supporting blocks are radially displaced and tightly supported between the left and right adjacent wear-resistant tiles 41. Thus, the wear-resistant tiles forming the wear-resistant layer 40 are circumferentially braced to block and isolate high-temperature flue gas in the flue pipe of the furnace. When each wear-resisting tile is independent, can guarantee again to block and completely cut off high temperature flue gas, the permanent stability of protection back structure. The wear-resistant tiles 41 can be independent from each other during thermal expansion and can be isolated from hot flue gas as a whole.
A plurality of pull-up arms 11 are welded on the inner side of the shell 10, each concave structure 31 is connected with a vertical row of pull-up arms, namely, the concave structures 31 are vertically arranged, and the back of each concave structure 31 is connected with a vertical row of pull-up arms which are vertically distributed. The insulating layer 20 is provided between the shield 30 and the casing 10 through which the pull-up arm passes, and is designed such that the insulating layer 20 is firmly attached to the inside of the casing 10, and at the same time, the shield 30 is firmly connected to the casing. Alternatively, the heat insulating layer 20 is made of a light heat insulating material such as glass wool, rock wool, or aluminum silicate fiber, or a super heat insulating material (aerogel nano material, nano particle material, or the like), and is substantially a composite heat insulating layer, which is not a fire-resistant heat insulating layer in the prior art. Due to the adoption of the composite heat insulation layer, the total thickness of the liner is reduced by more than 30% compared with that of the liner in the traditional structure on the premise of the same heat insulation effect. Can effectively reduce the whole size of the furnace smoke tube, reduce the metal consumption of the shell and reduce the cost.
As a modification, a lower bracket 13 is provided at the bottom of each recess structure 31, and the lower bracket is welded to the inside of the housing 10. The sub-mount can further reinforce the connection of the housing to the shield 30 and the connection of the insulating layer 20 to the housing 10.
As a structural design, referring to fig. 3 and 4, the wear-resistant layer 40 includes a plurality of layers of wear-resistant tiles distributed vertically, each layer of wear-resistant tile is composed of a plurality of arc-shaped wear-resistant tiles 41 and a supporting block 42 located between two adjacent wear-resistant tiles, and each layer of wear-resistant tile and the supporting block 42 form a ring. Two adjacent layers of wear-resistant tiles are arranged in a left-right staggered manner, for example, the middle position of one wear-resistant tile on the upper layer is vertically aligned with the boundary (the boundary is embedded with the supporting block 42) of two adjacent wear-resistant tiles on the lower layer. Thus, any recessed feature 31 faces the middle of an upper layer of wear resistant tiles and the boundary between two adjacent lower layers of wear resistant tiles (i.e., the brace 42). Whereas the filling module 51 for pressing the radial displacement of the stay 42 is only located at the back of the stay 42 and cannot be present at the back of the wear-resistant tiles 41. Therefore, any recessed structure 31 needs to be divided into several filling areas up and down, and the filling module 51 is filled only in the filling area behind the supporting block 42. Therefore, the connecting structure of the upper pull arm 11 and the recessed structure 31 is designed, specifically, the upper pull arm 11 and the recessed structure 31 are connected through the pin 12, the pin passes through the recessed structure, the boundary 43 between the upper and lower adjacent layers of wear-resistant tiles is as high as the pin, the recessed structure (i.e., the filling area) behind the wear-resistant tiles is filled with the heat-insulating module 52, the heat-insulating module and the filling module in the same recessed structure are isolated through the pin 12, i.e., the pin serves as a connecting member, and the filling area of the recessed structure 31 is divided, so that the heat-insulating module 52 is filled in the recessed structure behind the middle position of the wear-resistant tiles 41, and the filling module 51 is filled in the recessed structure behind the supporting block 42.
As shown in fig. 1, the longitudinal (vertical) section of each wear-resistant tile 41 is a parallelogram, and the upper and lower adjacent wear-resistant tiles are overlapped at the edge, so that the bottom edge of the upper wear-resistant tile can be pressed against the top edge of the lower wear-resistant tile in the upper and lower adjacent wear-resistant tiles to ensure the structural stability of the whole wear-resistant layer 40.
The left side and the right side of each wear-resistant tile 41 are provided with inclined planes 411, the cross section of each supporting block 42 is trapezoidal, and the supporting blocks and the left and right adjacent wear-resistant tiles are overlapped at the edges of the left side and the right side of each supporting block. Under the drive of filling module 51, the bracer radial displacement can strut the wear-resisting tile that is located its both sides, makes wear-resisting tile along circumferential displacement, and then, the wear-resisting tile of annular one deck is propped tightly, and this kind of tight direction of propping is fixed, specific, expands nondirectionally after being heated different from among the prior art tile or fragment of brick.
Alternatively, the filling module 51 comprises a high temperature resistant cloth (or a high temperature resistant fiber cloth) and paraffin wrapped by the high temperature resistant fiber cloth, the paraffin is solidified and has a reduced volume, and the volume is expanded when the paraffin is melted at a high temperature. The melting temperature of the paraffin is 47-64 ℃, the temperature of the boiler flue gas is 120-180 ℃, and the paraffin can be melted into liquid state in time when the boiler operates even if the boiler is wrapped by high-temperature-resistant cloth. Wherein, the high temperature resistant cloth can also be replaced by other high temperature resistant composite materials or high polymer materials.
Alternatively, the thermal insulation module 52 includes a high temperature resistant fiber cloth and a high temperature resistant thermal insulation fiber wrapped by the high temperature resistant fiber cloth.
Alternatively, the protective layer 30 includes a heat-resistant wire mesh and a heat-resistant fiber cloth, for example, a steel wire mesh is used as a substrate, and the heat-resistant fiber cloth is coated on the substrate to form the protective layer. The protective layer is attached to the inner side of the heat insulating layer 20.
When the furnace smoke tube lining needs local repair, compared with an old structure, the furnace smoke tube lining does not need the working procedures of cast material construction, maintenance, furnace baking and the like on site, and has the advantages of simple maintenance and small maintenance workload.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description herein, since various changes and modifications can be made in the details of the embodiment and the application range according to the spirit of the present invention.
Claims (8)
1. The utility model provides a stove tobacco pipe inside lining, includes casing (10), sets up at inboard heat insulation layer (20) of casing, sets up at inboard inoxidizing coating (30) of heat insulation layer, sets up at the inboard wearing layer (40) of inoxidizing coating, and the wearing layer is formed by a plurality of wear-resisting tile (41) combination, its characterized in that: the inoxidizing coating is equipped with a plurality of sunk structure (31), is equipped with bracer (42) between two adjacent wear-resisting tiles about, and the bracer is located sunk structure department, and the sunk structure behind the bracer is filled with expend with heat and contract with cold's filling module (51).
2. The oven smoke tube liner of claim 1 wherein: a plurality of upper pull arms (11) are welded on the inner side of the shell (10), and each concave structure (31) is connected with a longitudinal row of upper pull arms.
3. A smoke tube liner for a furnace as claimed in claim 2 wherein: the wear-resistant layer (40) comprises a plurality of layers of wear-resistant tiles which are distributed up and down, each layer of wear-resistant tile consists of a plurality of arc-shaped wear-resistant tiles (41) and a supporting block (42) positioned between two adjacent wear-resistant tiles, and the two layers of wear-resistant tiles which are adjacent up and down are arranged in a left-right staggered manner; the upper pull arm (11) is connected with the recessed structure (31) through the pin piece (12), the pin piece penetrates through the recessed structure, the boundary (43) of two adjacent layers of wear-resistant tiles is equal to the pin piece in height, the heat insulation module (52) is filled in the recessed structure behind the wear-resistant tiles, and the heat insulation module and the filling module in the same recessed structure are isolated through the pin piece (12).
4. A smoke tube liner for a furnace as claimed in claim 3 wherein: the longitudinal section of the wear-resistant tiles (41) is in a parallelogram shape, and the upper and lower adjacent wear-resistant tiles are overlapped at the edges.
5. A smoke tube liner for a furnace as claimed in claim 3 wherein: inclined planes (411) are arranged on the left side and the right side of each wear-resistant tile (41), the cross section of each supporting block (42) is trapezoidal, and the supporting blocks are overlapped with the left adjacent wear-resistant tiles and the right adjacent wear-resistant tiles at the edges.
6. The oven smoke tube liner of claim 1 wherein: the filling module (51) comprises high-temperature-resistant fiber cloth and paraffin wrapped by the high-temperature-resistant fiber cloth.
7. A smoke tube liner for a furnace as claimed in claim 3 wherein: the heat preservation module (52) comprises high-temperature-resistant fiber cloth and high-temperature-resistant heat preservation fibers wrapped by the high-temperature-resistant fiber cloth.
8. The oven smoke tube liner of claim 1 wherein: the protective layer (30) comprises a heat-resistant metal wire mesh and a high-temperature-resistant fiber cloth, and is attached to the inner side of the heat-insulating layer (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110017127.4A CN112856466B (en) | 2021-01-07 | 2021-01-07 | Furnace smoke tube lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110017127.4A CN112856466B (en) | 2021-01-07 | 2021-01-07 | Furnace smoke tube lining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112856466A true CN112856466A (en) | 2021-05-28 |
| CN112856466B CN112856466B (en) | 2023-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110017127.4A Active CN112856466B (en) | 2021-01-07 | 2021-01-07 | Furnace smoke tube lining |
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| Country | Link |
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| CN (1) | CN112856466B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4284106A (en) * | 1978-05-09 | 1981-08-18 | Kraftwerk Union Aktiengesellschaft | Pipe or vessel with internal lining |
| JPH051812A (en) * | 1991-06-18 | 1993-01-08 | Hitachi Zosen Corp | Structure of chimney lining |
| CA2423371A1 (en) * | 2003-03-26 | 2004-09-26 | Charles Perrault | Chimney with heat resistant anti-oxidant coating |
| JP2005061656A (en) * | 2003-08-08 | 2005-03-10 | Abe Ganaito Kogyo:Kk | Device for removing stack lining |
| CN201593795U (en) * | 2009-11-20 | 2010-09-29 | 马伸 | Sealed lining antiseptic structure of wet chimney |
| US20130095444A1 (en) * | 2010-06-22 | 2013-04-18 | Flsmidth A/S | Preheater shell temperature regulator |
| CN203231326U (en) * | 2013-01-30 | 2013-10-09 | 中国轻工业南宁设计工程有限公司 | Thermal-insulation smoke evacuation pipe |
| CN203869064U (en) * | 2014-06-13 | 2014-10-08 | 黑龙江省华能电力技术有限公司 | Silicon carbide ceramic flue gas duct with self-sealing structures |
| CN204494449U (en) * | 2015-03-31 | 2015-07-22 | 张树珍 | A kind of anticorrosion antiwear chimney |
| CN105841173A (en) * | 2016-05-18 | 2016-08-10 | 山东鲍尔浦塑胶股份有限公司 | Stack inner wall anticorrosion macromolecule polyethylene layer and construction method thereof |
| CN207455614U (en) * | 2017-11-02 | 2018-06-05 | 晶辰（淄博）环保科技有限公司 | A kind of chimney protective lining |
| CN207945690U (en) * | 2018-03-12 | 2018-10-09 | 葫芦岛市华能工业陶瓷有限公司 | A kind of high-temperature furnace smoke pipeline with brick laying structure |
-
2021
- 2021-01-07 CN CN202110017127.4A patent/CN112856466B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4284106A (en) * | 1978-05-09 | 1981-08-18 | Kraftwerk Union Aktiengesellschaft | Pipe or vessel with internal lining |
| JPH051812A (en) * | 1991-06-18 | 1993-01-08 | Hitachi Zosen Corp | Structure of chimney lining |
| CA2423371A1 (en) * | 2003-03-26 | 2004-09-26 | Charles Perrault | Chimney with heat resistant anti-oxidant coating |
| JP2005061656A (en) * | 2003-08-08 | 2005-03-10 | Abe Ganaito Kogyo:Kk | Device for removing stack lining |
| CN201593795U (en) * | 2009-11-20 | 2010-09-29 | 马伸 | Sealed lining antiseptic structure of wet chimney |
| US20130095444A1 (en) * | 2010-06-22 | 2013-04-18 | Flsmidth A/S | Preheater shell temperature regulator |
| CN203231326U (en) * | 2013-01-30 | 2013-10-09 | 中国轻工业南宁设计工程有限公司 | Thermal-insulation smoke evacuation pipe |
| CN203869064U (en) * | 2014-06-13 | 2014-10-08 | 黑龙江省华能电力技术有限公司 | Silicon carbide ceramic flue gas duct with self-sealing structures |
| CN204494449U (en) * | 2015-03-31 | 2015-07-22 | 张树珍 | A kind of anticorrosion antiwear chimney |
| CN105841173A (en) * | 2016-05-18 | 2016-08-10 | 山东鲍尔浦塑胶股份有限公司 | Stack inner wall anticorrosion macromolecule polyethylene layer and construction method thereof |
| CN207455614U (en) * | 2017-11-02 | 2018-06-05 | 晶辰（淄博）环保科技有限公司 | A kind of chimney protective lining |
| CN207945690U (en) * | 2018-03-12 | 2018-10-09 | 葫芦岛市华能工业陶瓷有限公司 | A kind of high-temperature furnace smoke pipeline with brick laying structure |
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| Publication number | Publication date |
|---|---|
| CN112856466B (en) | 2023-09-01 |
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