CN204612480U - A kind of heating-furnace top outlet sealing structure - Google Patents
A kind of heating-furnace top outlet sealing structure Download PDFInfo
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- CN204612480U CN204612480U CN201520169072.9U CN201520169072U CN204612480U CN 204612480 U CN204612480 U CN 204612480U CN 201520169072 U CN201520169072 U CN 201520169072U CN 204612480 U CN204612480 U CN 204612480U
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- gripper shoe
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Abstract
The utility model relates to a kind of heating-furnace top outlet sealing structure, sealing structure comprises ceramic fibre corner modules (1), gripper shoe (2) in ceramic fibre corner modules, lay cover plate (3) on the supporting plate, fixing ceramic fiber blanket (4) on the cover board, be packed in the ceramic fibre loose wool (5) in ceramic fibre corner modules, be wrapped in the waterproof composite cloth (7) outside ceramic fibre loose wool and rain cover (8), described ceramic fibre corner modules (1) is arranged on radiating furnace tube (9) both sides of heating furnace, it is characterized in that, described ceramic fibre corner modules (1) top is notch cuttype shape, described gripper shoe is positioned on the step of ceramic fibre corner modules (1), and away from radiating furnace tube (9).Compared with prior art, the utility model has that heat-proof quality is good, sealing effectiveness is outstanding, low cost and other advantages.
Description
Technical field
The utility model relates to a kind of heating-furnace top outlet sealing structure, especially relates to the heating-furnace top outlet sealing structure under a kind of complicated displacement operating mode.
Background technology
In tubular heater in design, the radiating furnace tube turnover insulation at furnace roof place and Seal Design one are to being key point in lining Design and difficult point, under normal conditions, the outlet displacement of radiating furnace tube only embodies position axially, radial direction does not almost have displacement, in such situation, boiler roof sealing design is relatively simple, as shown in Figure 1, a kind of boiler roof sealing structure, comprise ceramic fibre corner modules 1, radiating furnace tube 9, layer paving ceramic fiber blanket 4, this boiler roof sealing structure only needs to be designed to corner modules in radiating furnace tube exit, can meet the demands at corner modules upper strata paving ceramic fiber blanket again, but in part chemical plant installations, such as, in manufacturing olefin by low-carbon alkane dehydrogenation device, heating furnace radiating furnace tube boiler tube axially and radiating furnace tube concetrated pipe axis and radial direction all have displacement, and all directions displacement is all larger, reached at the 200mm had, above-mentioned common boiler roof sealing structure can not meet this displacement request.
For the boiler roof sealing under the operating mode of this kind of complicated displacement, each side has carried out multiple trial, boiler roof sealing structure in the multi-direction and Large travel range situation of a kind of radiating furnace tube, as shown in Figure 2, this boiler roof sealing structure comprises the gripper shoe 2 be laid on ceramic fiber module, the cover plate 3 be laid in gripper shoe 2, works waterproof glass fiber cloth 6 and rain cover 8 that intercept flue gas effect loose be packed in the ceramic fibre loose wool 5 on cover plate 3 and be wrapped in outside ceramic fibre loose wool 5, but the program exists, and following some is not enough:
1. the gripper shoe 2 of furnace roof directly contacts with high-temperature flue gas, steel plate expansion warpage can be caused, cause cover plate 3 can not be free to slide in this gripper shoe 2, being free to slide of direct obstruction radiating furnace tube, formation stress is concentrated, serious words are broken to causing boiler tube, and the inflammable medium of high temperature leaks, and form industrial accident.
2. the furnace roof steel plate of high temperature will form a heat conductor, flue gas heat reached on furnace roof steel structure girder, the design of furnace roof beam is generally the carbon steel material of non-refractory, can cause furnace roof steel construction overtemperature like this, reduce steel construction intensity, affect the safety of furnace roof steel construction.
3. between furnace roof steel plate and cover plate in actual use because of the sagging generation gap of furnace roof steel plate temperature distortion, such high-temperature flue gas is altered outside gap.Under theoretical case, the ceramic fiber cotton of loose filling can intercept flue gas, but in actual use, along with the movement of boiler tube, loose wool can be piled up, form space, high-temperature flue gas directly contact heatproof can only have the waterproof glass fiber cloth of 280 DEG C, and cause this cloth to become fragile, marine glue comes off, make it lose efficacy, no longer there is sealing function.
Utility model content
The purpose of this utility model be exactly provide that a kind of heat-proof quality is good, good airproof performance, cost are low to overcome defect that above-mentioned prior art exists, heating-furnace top outlet sealing structure that the life-span is long.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of heating-furnace top outlet sealing structure, sealing structure comprises ceramic fibre corner modules, be arranged on the gripper shoe in ceramic fibre corner modules, lay cover plate on the supporting plate, fixing ceramic fiber blanket on the cover board, be packed in the ceramic fibre loose wool in ceramic fibre corner modules, be wrapped in the waterproof composite cloth outside ceramic fibre loose wool and rain cover, described ceramic fibre corner modules is arranged on the radiating furnace tube both sides of heating furnace, described ceramic fibre corner modules top is notch cuttype shape, described gripper shoe is positioned on the step of ceramic fibre corner modules, and away from radiating furnace tube.
The side, counter-fire face of the ceramic fibre corner modules of stepped ramp type shape is protruding, and opposite side step is provided with gripper shoe, avoids gripper shoe and directly contacts with high-temperature flue gas, and what ensure gripper shoe is heat insulation.
The material selection stainless steel 06Cr19Ni10 of described gripper shoe, every collateral fagging is monoblock type plate, and is evenly arranged dilatation joint on this plate, avoids adjacent two pieces of upper and lower misalignments of gripper shoe in the design of gripper shoe multistage, thus stops that cover plate slides.The design of dilatation joint simultaneously also absorbs the thermal expansion amount of gripper shoe.
Described cover plate two ends are provided with slide rail, and extreme rounding, be placed in support plate upper surface, can slide on the supporting plate with boiler tube, meanwhile, special rounding slide rail effectively reduces resistance when gripper shoe is slided to cover plate; Cover plate adopts block design, is convenient to install.
The material selection low Ni alloy ZG35Cr24Ni7SiN of described cover plate.
Described ceramic fiber blanket is provided with at least four layers.
Described waterproof composite cloth is waterproof height silica and ceramic fibre Compound Fabric, comprises outer field waterproof height silica cloth, and the ceramic fiber cloth of internal layer, has both met high temperature resistant flue gas requirement, and has made again the tensile strength that Compound Fabric keeps certain.
Described rain cover cross-sectional upper part is that round platform is cone-shaped, and bottom is cylindrical shape, and described waterproof composite cloth is covered by rain cover completely.Like this, rain cover can effectively prevent rainwater from dropping on the waterproof composite cloth of sealing, reduces rainwater to the impact in waterproof composite cloth service life.
Compared with prior art, the utility model has the following advantages:
(1) heat-proof quality is good, and the notch cuttype design on corner modules and top thereof, can effectively avoid altering outside flue gas, ensures that the safety of back steel construction and soft seal Compound Fabric and use system can;
(2) good sealing effect, because loose wool and cover plate upper strata spread the design of blanket, makes the operating temperature of Compound Fabric lower, ensure that the performance of cloth, under Long-Time Service, also can not reveal;
(3) low Ni cast selected by cover plate, under the prerequisite of guaranteed performance, reduces cost.
(4) soft seal cloth skin adopts waterproof height silica cloth internal layer ceramic fiber cloth, is not only provided with the tensile property of silica cloth but also has gathered the resistance to elevated temperatures of the fine cloth of pottery.
(5) the rain cover design of fitting avoids rainwater directly to drop in Compound Fabric, to reduce cloth surface be coated with the impact of silica gel, add the service life of cloth.
Accompanying drawing explanation
Fig. 1 is ethane cracking furnace boiler roof sealing feature cross-section sectional view;
Fig. 2 is the boiler roof sealing feature cross-section sectional view of existing boiler tube in Large travel range situation;
Fig. 3 is furnace roof outlet sealing structure cross section view of the present utility model;
Fig. 4 is furnace roof outlet sealing structure longitudinal section of the present utility model sectional view;
In figure, ceramic fibre corner modules 1, gripper shoe 2, cover plate 3, ceramic fiber blanket 4, ceramic fibre loose wool 5, waterproof glass fiber cloth 6, waterproof composite cloth 7, rain cover 8, radiating furnace tube 9, channel-section steel 10, concetrated pipe 11.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment 1
As shown in Figure 3 and Figure 4, heating-furnace top outlet sealing structure under a kind of complicated displacement, sealing structure comprises ceramic fibre corner modules 1, the gripper shoe 2 be laid in ceramic fibre corner modules 1, the cover plate 3 be laid in gripper shoe 2, the ceramic fiber blanket 4 be fixed on cover plate 3, the ceramic fibre loose wool 5 be packed in ceramic fibre corner modules 1, be wrapped in waterproof composite cloth 7 outside ceramic fibre loose wool 5 and rain cover 8, and described ceramic fibre corner modules 1 is arranged on radiating furnace tube 9 both sides of heating furnace.
According to the displacement of radiating furnace tube 9 radial direction, design the ceramic fibre corner modules 1 of suitable dimension, the material rate of this corner modules can be selected according to the flue-gas temperature of burner hearth, and general and furnace roof insulation of wall selects same levels.The upper surface of ceramic fibre corner modules 1 is designed to notch cuttype, the side, counter-fire face of the ceramic fibre corner modules 1 of stepped ramp type shape is protruding, opposite side is provided with at least two-stage step, top stage is arranged gripper shoe 2, second level step is arranged channel-section steel 10, this channel-section steel 10 convexes to form a groove with ceramic fibre corner modules 1 counter-fire face, and gripper shoe 2 is placed in this groove, be fixed on channel-section steel 10, and the thickness of the degree of depth of groove and gripper shoe is suitable.In the present embodiment, the thickness of gripper shoe is 5mm, and the material selection stainless steel 06Cr19Ni10 of gripper shoe 2, every collateral fagging 2 is monoblock type plate, and dilatation joint is evenly arranged on this plate, avoid adjacent two pieces of upper and lower misalignments of gripper shoe in the design of gripper shoe multistage, thus stop that cover plate slides.The design of dilatation joint simultaneously also absorbs the thermal expansion amount of gripper shoe.Gripper shoe 2 upper surface opens near the side in counter-fire face the expansion slot being about whole plate width 1/3rd according to about spacing 300mm, gripper shoe 2 has reinforcement, between this reinforcement, material is consistent with gripper shoe 2, installing space can be width or its integral multiple of single ceramic fiber corner modules 1, so that when reinforcement is installed between two adjacent ceramic fibre corner modules.Gripper shoe 2 one end and channel-section steel 10 are welded and fixed, and the counter-fire face of the other end and ceramic fibre corner modules 1 has the distance of 50mm at least, and what ensure gripper shoe 2 is heat insulation.
Cover plate 3 points of polylith designs, be a cover plate in the middle of two often adjacent radiating furnace tubes, cover plate 3 is placed directly in gripper shoe 2, need not weld, and can be free to slide.Cover plate 3 adopts cast form, material selection ZG35Cr24Ni7SiN, and thickness is 8mm, and cover plate 3 is provided with reinforcement, and two ends are provided with slide rail, extreme rounding.The width design of cover plate 3 will ensure that radiating furnace tube 9 also has 50mm to ride in gripper shoe 2 when radial direction maximum displacement.Four layers of ceramic fiber blanket 4 are laid on cover plate 3 upper strata, ceramic fiber blanket 4 can not be too thick, in order to avoid affect the displacement of boiler tube vertical direction, for ensureing that ceramic fiber blanket 4 can move together with cover plate 3, need with L-type anchoring piece, ceramic fiber blanket 4 to be fixed on above cover plate 3, L-type anchor studs spacing is no more than 600mm, and at least arrange two rows, material selection stainless steel.Waterproof composite cloth 7 is waterproof height silica cloth and ceramic fibre Compound Fabric, edge of a wing bolt on one end pressing plate and channel-section steel 10 is fixed, the other end is fixed on the heat-insulation layer outside concetrated pipe 11, ceramic fiber cotton is clogged in the middle of concetrated pipe 11 and ceramic fibre corner modules 1, the ceramic fibre loose wool of filling can not compacting, only fills up.Outside waterproof composite cloth 7, bamboo product one encloses the rain cover 8 of 0.8mm aluminium leather material, and rain cover 8 is fixed by the Insulating aluminium skin outside tapping screw and concetrated pipe 11.
Claims (8)
1. a heating-furnace top outlet sealing structure, sealing structure comprises ceramic fibre corner modules (1), gripper shoe (2) in ceramic fibre corner modules, lay cover plate (3) on the supporting plate, fixing ceramic fiber blanket (4) on the cover board, be packed in the ceramic fibre loose wool (5) in ceramic fibre corner modules, be wrapped in the waterproof composite cloth (7) outside ceramic fibre loose wool and rain cover (8), described ceramic fibre corner modules (1) is arranged on radiating furnace tube (9) both sides of heating furnace, it is characterized in that, described ceramic fibre corner modules (1) top is notch cuttype shape, described gripper shoe is positioned on the step of ceramic fibre corner modules (1), and away from radiating furnace tube (9).
2. a kind of heating-furnace top according to claim 1 outlet sealing structure, is characterized in that, the side, counter-fire face of the ceramic fibre corner modules (1) of stepped ramp type shape is protruding, opposite side step is provided with gripper shoe (2).
3. a kind of heating-furnace top according to claim 1 and 2 outlet sealing structure, it is characterized in that, the material selection stainless steel 06Cr19Ni10 of described gripper shoe (2), every collateral fagging is monoblock type plate, and is evenly arranged dilatation joint on this plate.
4. a kind of heating-furnace top according to claim 1 outlet sealing structure, is characterized in that, described cover plate (3) two ends are provided with slide rail, and extreme rounding, be placed on gripper shoe (2) upper surface.
5. a kind of heating-furnace top according to claim 4 outlet sealing structure, is characterized in that, the material selection low Ni alloy ZG35Cr24Ni7SiN of described cover plate (3).
6. a kind of heating-furnace top according to claim 1 outlet sealing structure, is characterized in that, described ceramic fiber blanket (4) is provided with at least four layers.
7. a kind of heating-furnace top according to claim 1 outlet sealing structure, it is characterized in that, described waterproof composite cloth (7) is waterproof height silica and ceramic fibre Compound Fabric, comprises outer field waterproof height silica cloth, and the ceramic fiber cloth of internal layer.
8. a kind of heating-furnace top according to claim 1 outlet sealing structure, is characterized in that, described rain cover (8) cross-sectional upper part is that round platform is cone-shaped, and bottom is cylindrical shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520169072.9U CN204612480U (en) | 2015-03-24 | 2015-03-24 | A kind of heating-furnace top outlet sealing structure |
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| CN201520169072.9U CN204612480U (en) | 2015-03-24 | 2015-03-24 | A kind of heating-furnace top outlet sealing structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387721A (en) * | 2015-10-12 | 2016-03-09 | 清华大学 | Combined supporting steel beam suitable for high-temperature heating furnace cooling pipe network |
| CN107227169A (en) * | 2016-03-25 | 2017-10-03 | 中国石化工程建设有限公司 | The furnace top insulation heat-proof device of pyrolysis furnace radiant section |
| CN109442043A (en) * | 2018-11-06 | 2019-03-08 | 中国寰球工程有限公司 | Industrial furnace high-temperature hearth seal structure |
-
2015
- 2015-03-24 CN CN201520169072.9U patent/CN204612480U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387721A (en) * | 2015-10-12 | 2016-03-09 | 清华大学 | Combined supporting steel beam suitable for high-temperature heating furnace cooling pipe network |
| CN107227169A (en) * | 2016-03-25 | 2017-10-03 | 中国石化工程建设有限公司 | The furnace top insulation heat-proof device of pyrolysis furnace radiant section |
| CN107227169B (en) * | 2016-03-25 | 2019-01-22 | 中国石化工程建设有限公司 | The furnace top insulation heat-proof device of pyrolysis furnace radiant section |
| CN109442043A (en) * | 2018-11-06 | 2019-03-08 | 中国寰球工程有限公司 | Industrial furnace high-temperature hearth seal structure |
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