CN117685555A - Multi-row tube bundle sealing box at tube penetrating position of water cooling wall of coke dry quenching boiler - Google Patents
Multi-row tube bundle sealing box at tube penetrating position of water cooling wall of coke dry quenching boiler Download PDFInfo
- Publication number
- CN117685555A CN117685555A CN202311847982.3A CN202311847982A CN117685555A CN 117685555 A CN117685555 A CN 117685555A CN 202311847982 A CN202311847982 A CN 202311847982A CN 117685555 A CN117685555 A CN 117685555A
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- water
- sealing
- box
- sealing cover
- tube bundle
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- 238000007789 sealing Methods 0.000 title claims abstract description 80
- 230000000149 penetrating effect Effects 0.000 title claims abstract description 22
- 238000010791 quenching Methods 0.000 title claims abstract description 19
- 230000000171 quenching effect Effects 0.000 title claims abstract description 19
- 239000000571 coke Substances 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 12
- 238000001816 cooling Methods 0.000 title claims description 7
- 229920000742 Cotton Polymers 0.000 claims abstract description 12
- 238000004321 preservation Methods 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Landscapes
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention provides a multi-row tube bundle sealing box at a tube penetrating position of a water-cooled wall of a coke dry quenching boiler, which comprises a fixed box and a sealing cover, wherein the fixed box is fixedly arranged at the tube penetrating position of the water-cooled wall and is sleeved outside the tube bundle; a comb-shaped plate (5) is arranged in the fixed box, and a plurality of comb teeth positioned among the tube bundles are arranged on the comb-shaped plate (5); a sealing folded plate (3) is also arranged in the fixed box; the sealing cover (2) is wrapped outside the tube bundle, one end of the sealing cover (2) is connected to the fixed box, and the other end of the sealing cover is welded and fixed with the header; the sealing cover (2) is also filled with heat preservation cotton (1). The invention can ensure the tightness and not influence the deformation expansion of the tube bundle, and solves the technical problem of conflict between the thermal expansion and the tightness in the prior art.
Description
Technical Field
The invention relates to the technical field of waste heat boilers, in particular to a multi-row tube bundle sealing box at a tube penetrating position of a water cooling wall of a coke dry quenching boiler.
Background
The dry quenching waste heat boiler utilizes the high-temperature circulating gas absorbed with red Jiao Xianre to enable the high-temperature circulating gas to exchange heat with a heated medium in a heating surface of the boiler, thereby generating steam with rated parameters and quality, supplying steam for a generator or a user, and being the waste heat boiler with high efficiency and energy conservation under the current environmental protection requirement.
The hot flue gas of the waste heat boiler enters a tail flue economizer region after passing through heating surfaces such as a superheater, a reheater and an evaporator, wherein when the dry quenching waste heat boiler normally operates, the wall temperature of the superheater and the reheater is about 200 ℃ higher than that of a water wall of the boiler, and in the operating state, the superheater and the reheater have larger expansion difference at a through pipe of the water wall, and due to the fact that the dry quenching boiler has high CO content and H content 2 The content has strict control requirements, and the dry quenching waste heat boiler has strict requirements on tightness. In order to meet the thermal expansion difference between the superheater and the water-cooled wall, a welding structure of expansion joints and sealing boxes is usually arranged at the position of a water-cooled wall penetrating pipe. However, when there are multiple rows of tube bundle penetrating tubes, the comb plate cannot be welded with the middle layer tube bundle when the comb plate is installed due to small tube bundle spacing of the multiple rows of tube bundles, and a large amount of air leakage positions exist in a sealing mode.
Based on the above, the invention provides a novel sealing scheme capable of reducing the conflict influence of the thermal expansion and the tightness of the boiler sealing box.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a multi-row tube bundle sealing box at a tube penetrating position of a water cooling wall of a coke dry quenching boiler, which can ensure the tightness and does not influence the deformation and expansion of the tube bundles, and is realized by the following technical scheme:
the utility model provides a dry quenching boiler water-cooled wall poling department multirow tube bank seal box, includes sealed cowling, fixed box, wherein:
the fixing box is fixedly arranged at a pipe penetrating position of the water-cooled wall and is sleeved outside the pipe bundle;
a comb-shaped plate is arranged in the fixed box, and a plurality of comb teeth positioned among the tube bundles are arranged on the comb-shaped plate; a sealing folded plate is also arranged in the fixed box;
the sealing cover is wrapped outside the tube bundle, one end of the sealing cover is connected to the fixed box, and the other end of the sealing cover is welded and fixed with the header; and heat preservation cotton is filled in the sealing cover.
Optionally or preferably, the fixing box comprises a water-cooled wall pre-welded piece, a clamping plate and a connecting plate; one end of the water-cooled wall pre-welding piece is welded and fixed on the water-cooled wall, and the other end of the water-cooled wall pre-welding piece is fixedly connected with the sealing cover through the clamping plate and the connecting plate.
Optionally or preferably, the fixed box is square box structure, sealing folded plate in the fixed box can cooperate with the clamping plate, so that the water-cooled wall can expand along the depth direction of the hearth when keeping sealing.
Optionally or preferably, the heat-insulating cotton is aluminum silicate fiber cotton, so that the damage of high-temperature flue gas to the header and the sealing cover can be effectively prevented.
Optionally or preferably, the cover shell of the sealing cover adopts a folded plate splicing structure in welded connection, so that expansion difference of the boiler water-cooled wall and the sealing cover along the width direction of the hearth can be absorbed.
Alternatively or preferably, the teeth of the comb plate mate closely with the tube bundle, the teeth being in loose metal-to-metal hard contact with the tube bundle.
Based on the technical scheme, the multi-row tube bundle sealing box at the water-cooling wall tube penetrating position of the dry quenching boiler can provide sealing for serpentine tubes with multi-row tube bundles, such as a superheater and a reheater of the dry quenching waste heat boiler, at the water-cooling wall tube penetrating position or the flue guard plate tube penetrating position, and has the beneficial effects that:
(1) The matching structure of the sealing box and the sealing folded plate can effectively absorb the expansion difference of the water-cooled wall and the tube bundle along the depth direction of the hearth;
(2) The comb-shaped plate can increase the entry resistance of the smoke and reduce the amount of the smoke entering the sealing cover;
(3) The invention comprises a comb-shaped plate sealing and sealing cover sealing two-stage sealing structure, which not only solves the problem of expansion difference between the superheater and the water-cooled wall in the width direction and the depth direction of the hearth in the operation of the boiler, but also can avoid the problem that a plurality of rows of tube bundles of the superheater are difficult to weld with the comb-shaped plate;
(4) The heat-insulating cotton is filled in the sealing cover, so that the damage of high-temperature flue gas to the header and the sealing cover can be prevented, and the bending deformation of the tube bundle is not influenced to adapt to expansion.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a front view (cross-sectional view) of the present invention;
FIG. 2 is a cross-sectional view taken in the A-A direction of the present invention;
FIG. 3 is a B-B cross-sectional view of the present invention;
FIG. 4 is a schematic diagram of the structure of the teeth on the comb plate according to the present invention;
FIG. 5 is a schematic view of a seal cover in a folded configuration according to the present invention;
FIG. 6 is an enlarged schematic view of a portion of structure C of the present invention;
in the figure: 1-heat preservation cotton, 2-sealing covers, 3-sealing folded plates, 4-clamping plates, 5-comb plates, 6-connecting plates, 7-water-cooled wall pre-welded parts and 501-comb teeth.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
the embodiment provides a multi-row tube bundle sealing box at a tube penetrating position of a water-cooled wall of a coke dry quenching boiler, which comprises a fixed box and a sealing cover 2 as shown in fig. 1-3, wherein:
the fixing box is fixedly arranged at a pipe penetrating position of the water-cooled wall and is sleeved outside the pipe bundle;
as shown in fig. 4, a comb plate 5 is arranged in the fixing box, and a plurality of comb teeth positioned between the tube bundles are arranged on the comb plate 5; a sealing folded plate 3 is also arranged in the fixed box;
the sealing cover 2 is wrapped outside the tube bundle, one end of the sealing cover 2 is connected to the fixed box, and the other end of the sealing cover 2 is welded and fixed with the header; the sealing cover 2 is also filled with heat preservation cotton 1, so that the damage to the header and the sealing cover caused by high-temperature flue gas can be prevented, and the bending deformation of the coiled pipe is not influenced to adapt to expansion.
In this embodiment, the fixing box includes a water-cooled wall pre-welded part 7, a clamping plate 4 and a connecting plate 6; one end of the water-cooled wall pre-welding piece 7 is welded and fixed on the water-cooled wall, and the other end of the water-cooled wall pre-welding piece is fixedly connected with the sealing cover 2 through the clamping plate 4 and the connecting plate 6.
In this embodiment, as shown in fig. 2, the fixing box has a quadrilateral structure that is matched with each other, and can absorb the expansion difference of the water-cooled wall and the superheater coiled pipe along the depth direction of the hearth; the sealing folded plate 3 in the fixing box can be matched with the clamping plate 4, so that the water-cooled wall can expand along the depth direction of the hearth when the sealing is kept.
In this embodiment, the heat-insulating cotton 1 is aluminum silicate fiber cotton, and has the advantages of high temperature resistance, good thermal stability, low thermal conductivity, small heat capacity, good mechanical vibration resistance, small thermal expansion, good heat insulation performance and the like, and can effectively prevent the damage of high-temperature flue gas to the header and the sealing cover.
In this embodiment, as shown in fig. 5 and 6, the casing of the sealing cover 2 adopts a folded plate splicing structure with welded connection, so that the expansion difference between the boiler water-cooled wall and the sealing cover along the width direction of the furnace chamber can be absorbed.
In this embodiment, the comb teeth of the comb plate 5 are tightly matched with the tube bundle, and the comb teeth are in loose metal-metal hard contact with the tube bundle; the comb-shaped plate 5 with the structure can increase smoke resistance, reduce air inflow of smoke entering the sealing cover, avoid welding the tube bundle and the sealing plate on a construction site, ensure good construction quality of a heating surface and reduce on-site heat treatment work.
The working principle of the embodiment is as follows:
as shown in fig. 1, the multi-row tube bundle sealing box is arranged at the penetrating tube position of the superheater, the sealing folded plate 3 is fixed on the water-cooled wall pre-welding piece 7, the sealing folded plate 3 and the water-cooled wall pre-welding piece 7 are fixed on the secondary sealing cover 2 of the eduction tube through the clamping plate 4 and the connecting plate 6, the comb-shaped plate 5 blocks gaps among the tube rows, and primary sealing which is tightly welded except the tube rows is formed; the water-cooled wall pre-welding piece 7 is welded and sealed with the sealing cover 2 through the clamping plate 4 and the connecting plate 6, one end of the sealing cover 2 is fixed at the collecting box to form a tightly welded secondary seal, and meanwhile, when the eduction pipe folded plate is installed, the sealing cover is filled with aluminum silicate cellucotton 1 to prevent high-temperature flue gas from damaging the collecting box and the sealing cover.
The structures, functions, and connections disclosed herein may be implemented in other ways. For example, the embodiments described above are illustrative only, and other arrangements are possible, e.g., multiple components may be combined or integrated with one another; in addition, each functional component in the embodiments herein may be integrated into one functional component, or each functional component may exist alone physically, or two or more functional components may be integrated into one functional component.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (6)
1. A multi-row tube bundle sealing box at a tube penetrating position of a water cooling wall of a coke dry quenching boiler is characterized in that: including fixed box and sealed cowling, wherein:
the fixing box is fixedly arranged at a pipe penetrating position of the water-cooled wall and is sleeved outside the pipe bundle;
a comb-shaped plate (5) is arranged in the fixed box, and a plurality of comb teeth positioned among the tube bundles are arranged on the comb-shaped plate (5); a sealing folded plate (3) is also arranged in the fixed box;
the sealing cover (2) is wrapped outside the tube bundle, one end of the sealing cover (2) is connected to the fixed box, and the other end of the sealing cover is welded and fixed with the header; the sealing cover (2) is also filled with heat preservation cotton (1).
2. The multi-row tube bundle sealing box at the tube penetrating position of the water wall of the coke dry quenching boiler as claimed in claim 1, wherein: the fixing box comprises a water-cooled wall pre-welding piece (7), a clamping plate (4) and a connecting plate (6); one end of the water-cooled wall pre-welding piece (7) is welded and fixed on the water-cooled wall, and the other end of the water-cooled wall pre-welding piece is fixedly connected with the sealing cover (2) through the clamping plate (4) and the connecting plate (6).
3. The multi-row tube bundle sealing box at the tube penetrating position of the water wall of the coke dry quenching boiler as claimed in claim 1, wherein: the fixed box is of a square box structure, and the sealing folded plate (3) in the fixed box can be matched with the clamping plate (4) so that the water-cooled wall can expand along the depth direction of the hearth when the water-cooled wall is kept sealed.
4. The multi-row tube bundle sealing box at the tube penetrating position of the water wall of the coke dry quenching boiler as claimed in claim 1, wherein: the heat preservation cotton (1) is aluminum silicate fiber cotton, and can effectively prevent the damage of high-temperature flue gas to the header and the sealing cover.
5. The multi-row tube bundle sealing box at the tube penetrating position of the water wall of the coke dry quenching boiler as claimed in claim 1, wherein: the cover shell of the sealing cover (2) adopts a folded plate splicing structure in welded connection, and can absorb the expansion difference between the boiler water-cooled wall and the sealing cover along the width direction of the hearth.
6. The multi-row tube bundle sealing box at the tube penetrating position of the water wall of the coke dry quenching boiler as claimed in claim 1, wherein: the comb teeth of the comb-shaped plate (5) are tightly matched with the tube bundle, and the comb teeth are in unfixed metal-metal hard contact with the tube bundle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311847982.3A CN117685555A (en) | 2023-12-29 | 2023-12-29 | Multi-row tube bundle sealing box at tube penetrating position of water cooling wall of coke dry quenching boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311847982.3A CN117685555A (en) | 2023-12-29 | 2023-12-29 | Multi-row tube bundle sealing box at tube penetrating position of water cooling wall of coke dry quenching boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117685555A true CN117685555A (en) | 2024-03-12 |
Family
ID=90139003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311847982.3A Pending CN117685555A (en) | 2023-12-29 | 2023-12-29 | Multi-row tube bundle sealing box at tube penetrating position of water cooling wall of coke dry quenching boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117685555A (en) |
-
2023
- 2023-12-29 CN CN202311847982.3A patent/CN117685555A/en active Pending
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