CN112856466B - Furnace smoke tube lining - Google Patents
Furnace smoke tube lining Download PDFInfo
- Publication number
- CN112856466B CN112856466B CN202110017127.4A CN202110017127A CN112856466B CN 112856466 B CN112856466 B CN 112856466B CN 202110017127 A CN202110017127 A CN 202110017127A CN 112856466 B CN112856466 B CN 112856466B
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- Prior art keywords
- wear
- resistant
- tiles
- layer
- temperature
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Classifications
-
- 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
-
- 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 insulation layer arranged on the inner side of the shell, a protective layer arranged on the inner side of the heat insulation 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 concave structures, supporting blocks are arranged between two adjacent wear-resistant tiles on the left side and the right side, the supporting blocks are positioned at the concave structures, and filling modules for expanding with heat and contracting with cold are filled in the concave structures behind the supporting blocks. When the furnace smoke pipeline is in a high-temperature state, the filling module is heated and expanded, the supporting blocks are extruded, and the supporting blocks are tightly supported between the left and right adjacent wear-resistant tiles, so that the wear-resistant tiles combined into a circular ring shape are tightly supported to block and isolate high-temperature smoke in the furnace smoke pipeline, and the long-term stability of the back structure of the wear-resistant layer is protected.
Description
Technical Field
The invention relates to boiler equipment, in particular to smoke discharging equipment of a boiler.
Background
The flue gas pipeline is an important device for conveying media such as flue gas in the boiler industry. The inner lining of the smoke pipeline of the current running furnace is a composite structure which is in an inner heat preservation mode and is provided with a steel shell outside, and the functional material selection of the inner lining of the typical structure is usually a wear-resistant layer, a fire-resistant heat preservation layer, a heat insulation heat preservation layer and the steel shell from inside to outside (the fire surface is the inner side).
The wear-resistant layer is divided into two common forms of wear-resistant castable and wear-resistant bricks.
The fireproof heat-insulating layer is made of medium fireproof heat-insulating castable and the like.
The heat insulation layer is made of light heat insulation castable or high-strength fiber board.
The steel shell is used as a structural main body of the furnace smoke tube, and supports the lining material while forming a closed channel. The steel shell is provided with structural members such as metal anchoring parts, supporting plates and the like to adhere the lining material to the steel shell.
The furnace smoke tube lining formed by a series of lining structures has the defects that firstly, the self weight is heavy, secondly, water is added on site to stir, maintenance and baking are carried out, and the heat insulation effect is poor again. Because of adopting the medium refractory heat-insulating castable, the light heat-insulating castable or the high-strength fiber board and other materials with heavier volume weight (compared with the light heat-insulating materials such as rock wool, glass wool, aluminum silicate fiber products, calcium silicate heat-insulating products and the like), the lining structure has heavier dead weight, and as a result, the difficulty in selecting the supporting and guiding device of the furnace smoke tube body is increased, the weight of the boiler steel frame is increased, and compared with the light heat-insulating materials, the heat-insulating performance of the lining structure is poorer. After the water is added and stirred, maintenance and baking are needed, the cost and the installation period of the whole smoke tube equipment are increased, and the premature failure of the lining is easily caused by improper maintenance and baking. The heat insulation effect is poor, so that the thickness of the lining is 20-50% larger than that of the light heat insulation material such as glass wool, rock wool and aluminum silicate fiber to achieve the same heat insulation effect, the overall external size of the furnace smoke pipe equipment is increased, and certain difficulty is caused to the arrangement of the furnace smoke pipe equipment.
The invention comprises the following steps:
the technical problems solved by the invention are as follows: high temperature flue gas in the flue gas pipeline 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, sets up at the inboard insulating layer of casing, sets up at the inboard inoxidizing coating of insulating layer, sets up the wearing layer inboard at the inoxidizing coating, and the wearing layer is formed by a plurality of wear-resisting tiles combination, and the inoxidizing coating is equipped with a plurality of concave structure, is equipped with the supporting shoe between two wear-resisting tiles of two adjacent about, and the supporting shoe is located concave structure department, fills in the concave structure behind the supporting shoe has the filling module of expend with heat and contract with cold.
The design of the concave structure of the protective layer provides conditions for the arrangement of the filling modules while the heat insulation layer is firmly fixed on the inner side of the shell.
When the furnace smoke pipeline is in a high-temperature state, the filling module is heated and expanded, the supporting blocks are extruded and move along the radial direction of the furnace smoke pipeline, and the supporting blocks are tightly supported between the left and right adjacent wear-resistant tiles, so that the wear-resistant tiles combined into a circular ring shape are tightly supported to block and isolate high-temperature smoke in the furnace smoke pipeline, the long-term stability of the back structure of the wear-resistant layer is protected, the back structure of the wear-resistant layer is prevented from being washed by the high-temperature smoke, the direct contact between metal pieces and smoke is reduced, and the possible corrosion is slowed down.
Description of the drawings:
FIG. 1 is a schematic perspective view of a partial structure of a furnace smoke tube liner;
FIG. 2 is a schematic view of the furnace tube liner of FIG. 1 from the rear;
FIG. 3 is an exploded view of FIG. 2;
FIG. 4 is a schematic plan view of a partial structure of a furnace smoke tube liner.
The symbols in the drawings illustrate:
10. a housing; 11. a pull-up 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-resistant layer; 41. wear-resistant tiles; 411. an inclined plane; 42. a support block; 43. dividing lines of two adjacent layers of wear-resistant tiles;
51. filling a module; 52. a thermal insulation module;
60. and (5) heating the surface.
The specific embodiment is as follows:
referring to fig. 1 and 4, a lining of a smoke tube of a furnace comprises a shell 10, a heat insulation layer 20 arranged on the inner side of the shell, a protective layer 30 arranged on the inner side of the heat insulation layer, and 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 concave structures 31, supporting blocks 42 are arranged between two adjacent wear-resistant tiles, the supporting blocks are positioned at the concave structures, and filling modules 51 with thermal expansion and cold contraction are filled in the concave structures behind the supporting blocks.
The invention adopts the pre-sintered wear-resistant tile 41 and the support block 42 to form the wear-resistant layer 40, and does not adopt wear-resistant bricks or wear-resistant castable, and as moisture is not required to be added in the manufacturing and mounting processes, compared with the prior structure, the invention does not need to adopt the maintenance and baking processes for refractory materials, so that the dead weight of the smoke tube of the furnace is reduced, the baking is not required, the construction period is shortened, and the cost is reduced.
The wear-resistant tiles 41 are combined into a circular ring shape, a supporting block 42 is arranged between every two adjacent wear-resistant tiles, a concave structure 31 is arranged at the back of each supporting block, and the filling module 51 is filled in the concave structure. The conditions for generating the high-temperature smoke are high temperature, at this time, the furnace smoke pipeline is in a high-temperature state, all the filling modules 51 are heated and expanded, corresponding supporting blocks 42 are extruded along the radial direction of the furnace smoke pipeline, and the supporting blocks are radially displaced and are tightly supported between the left and right adjacent wear-resistant tiles 41. In this manner, the wear resistant tiles comprising wear layer 40 are circumferentially tightened against and insulate the high temperature flue gas in the flue gas duct. Each wear-resisting tile is independent of each other, and meanwhile, the high-temperature flue gas can be blocked and isolated, and the long-term stability of the back structure is protected. The wear-resistant tiles 41 can be mutually independent during thermal expansion, and the whole wear-resistant tiles are isolated from hot smoke.
The inner side of the casing 10 is welded with a plurality of pull-up arms 11, each concave structure 31 is connected with a vertical pull-up arm, namely, a concave structure 31 arranged vertically, and the back of the concave structure is connected with a vertical pull-up arm distributed vertically, and as an option, the pull-up arms are made of metal materials. The insulation layer 20 is arranged between the protective layer 30 and the housing 10, through which insulation layer the pull-up arms pass, so designed that the insulation layer 20 is firmly attached to the inside of the housing 10, while at the same time the protective layer 30 is firmly connected to the housing. 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 nanomaterial, nanoparticle material, or the like), and is a substantially composite heat insulating layer, and the refractory heat insulating layer in the prior art is omitted. Due to the adoption of the composite heat insulation layer, the total thickness of the lining is reduced by more than 30% compared with the traditional structure on the premise of the same heat insulation effect. The overall size of the smoke tube of the furnace can be effectively reduced, the metal consumption of the shell is reduced, and the cost is reduced.
As a modification, the bottom of each recess 31 is provided with a lower bracket 13 welded to the inside of the housing 10. The lower bracket can further reinforce the connection of the shell with the shielding 30 and the connection of the insulation layer 20 with the shell 10.
As a structural design, referring to fig. 3 and 4, the wear-resistant layer 40 includes several layers of wear-resistant tiles distributed up and down, each layer of wear-resistant tiles is composed of several arc-shaped wear-resistant tiles 41 and a supporting block 42 located between two adjacent wear-resistant tiles, and each layer of wear-resistant tiles and supporting block 42 form a ring. The two adjacent layers of wear-resistant tiles are arranged in a left-right staggered way, for example, the middle position of one wear-resistant tile of the upper layer is aligned up and down with the boundary position (the boundary position is inlaid with the supporting block 42) of the two adjacent wear-resistant tiles of the lower layer. Thus, facing any one of the recess structures 31 is the middle position of the wear-resistant tile of the upper layer and the boundary between two adjacent wear-resistant tiles of the lower layer (i.e. the support blocks 42). Whereas the filling module 51 for the radial displacement of the pressing stay 42 is located only at the back of the stay 42 and cannot be present at the back of the wear resistant tile 41. Therefore, any one of the recess structures 31 needs to be divided up and down into several filling areas, and only the filling areas behind the support blocks 42 are filled with the filling modules 51. For this reason, the connection structure of the pull-up arm 11 and the concave structure 31 is designed, specifically, the pull-up arm 11 and the concave structure 31 are connected through the pin member 12, the pin member passes through the concave structure, the parting line 43 of the upper and lower adjacent layers of wear-resistant tiles is equal to the pin member, the concave structure (i.e. the filling area) behind the wear-resistant tiles is filled with the heat preservation module 52, the heat preservation module and the filling module in the same concave structure are isolated by the pin member 12, i.e. the pin member serves as the connection member and simultaneously divides the filling area of the concave structure 31 so as to satisfy the requirement that the concave structure behind the middle position of the wear-resistant tile 41 is filled with the heat preservation module 52, and the concave structure behind the support block 42 is filled with the filling module 51.
As shown in fig. 1, each wear-resistant tile 41 has a parallelogram cross section in the longitudinal direction (vertical direction), and the upper and lower adjacent wear-resistant tiles are superimposed at the edges, so that, among the upper and lower adjacent wear-resistant tiles, the bottom edge of the upper wear-resistant tile can be pressed against the top edge of the lower wear-resistant tile to ensure the stability of the structure of the whole wear-resistant layer 40.
The left and right sides of each wear-resisting tile 41 are provided with inclined planes 411, the cross section of each supporting block 42 is trapezoid, and the supporting blocks and the left and right adjacent wear-resisting tiles are overlapped at the edges of the left and right sides of the supporting blocks. Under the drive of the filling module 51, the supporting blocks are radially displaced, so that the wear-resistant tiles on two sides of the supporting blocks can be supported, the wear-resistant tiles are circumferentially displaced, and then, one layer of annular wear-resistant tiles are supported tightly, and the supporting direction is fixed and specific, and is different from the situation that the tiles or bricks expand nondirectionally after being heated in the prior art.
Alternatively, the filling module 51 includes a high temperature resistant cloth (or a high temperature resistant fiber cloth) and paraffin wrapped by the high temperature resistant fiber cloth, and the paraffin solidifies to have a reduced volume and expands when 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 even if the boiler flue gas is wrapped by high temperature resistant cloth, the paraffin can be timely melted into liquid state when the boiler operates. 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 with the high temperature resistant fiber cloth.
Alternatively, the protective layer 30 includes a heat-resistant wire mesh and a high-temperature-resistant fiber cloth, for example, a wire mesh made of steel is used as a base material, and the high-temperature-resistant fiber cloth is coated on the base material to form the protective layer. The protective layer is attached to the inside of the heat insulating layer 20.
Compared with the prior art, the furnace smoke pipe lining does not need the procedures of on-site casting material construction, maintenance, furnace baking and the like when the furnace smoke pipe lining needs to be locally repaired, and has the advantages of simple maintenance and small maintenance workload.
The foregoing is merely illustrative of the preferred embodiments of the present invention, and modifications in detail will readily occur to those skilled in the art based on the teachings herein without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a stove tobacco pipe inside lining, includes casing (10), sets up in the inboard insulating layer (20) of casing, sets up in the inboard inoxidizing coating (30) of insulating layer, sets up in inboard wearing layer (40) of inoxidizing coating, and the wearing layer is formed by the combination of a plurality of wear-resisting tiles (41), its characterized in that: the protective layer is provided with a plurality of concave structures (31), a supporting block (42) is arranged between two adjacent abrasion-resistant tiles on the left and right, the supporting block is positioned at the concave structure, and a filling module (51) for expanding with heat and contracting with cold is filled in the concave structure behind the supporting block;
when the furnace smoke pipeline is in a high-temperature state, the filling module is heated and expanded, the supporting blocks are extruded, the supporting blocks are displaced along the radial direction of the furnace smoke pipeline and are tightly supported between the left and right adjacent wear-resistant tiles, so that the wear-resistant tiles combined into a circular ring shape are tightly supported to block and isolate high-temperature smoke in the furnace smoke pipeline.
2. The furnace tube liner of claim 1, wherein: a plurality of upward pulling arms (11) are welded on the inner side of the shell (10), and each concave structure (31) is connected with one longitudinal upward pulling arm.
3. A fire tube liner 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 is composed of a plurality of arc-shaped wear-resistant tiles (41) and supporting blocks (42) positioned between two adjacent wear-resistant tiles, and the two adjacent wear-resistant tiles are arranged in a left-right staggered manner; the upper pulling arm (11) is connected with the concave structure (31) through a pin piece (12), the pin piece penetrates through the concave structure, the parting line (43) of the upper and lower adjacent layers of wear-resistant tiles is equal to the pin piece in height, the concave structure behind the wear-resistant tiles is filled with a heat preservation module (52), and the heat preservation module in the same concave structure is isolated from the filling module through the pin piece (12).
4. A fire tube liner as claimed in claim 3 wherein: the wear-resistant tiles (41) are parallelogram-shaped in longitudinal section, and the upper and lower adjacent wear-resistant tiles are overlapped at the edges.
5. A fire tube liner as claimed in claim 3 wherein: inclined planes (411) are arranged on the left side and the right side of the wear-resistant tile (41), the cross section of the supporting block (42) is trapezoid, and the supporting block and the left and the right adjacent wear-resistant tiles are overlapped at the edges.
6. The furnace 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 fire tube liner 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 furnace tube liner of claim 1, wherein: the protective layer (30) comprises a heat-resistant wire mesh and high-temperature-resistant fiber cloth, and is attached to the inner side of the heat insulation 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 CN112856466A (en) | 2021-05-28 |
| CN112856466B true CN112856466B (en) | 2023-09-01 |
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ID=76004728
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| 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 (11)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2801613A1 (en) * | 2010-06-22 | 2011-12-29 | Flsmidth A/S | Preheater shell temperature regulator |
-
2021
- 2021-01-07 CN CN202110017127.4A patent/CN112856466B/en active Active
Patent Citations (11)
| 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 |
| 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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| CN112856466A (en) | 2021-05-28 |
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