CN117663179A - Novel boiler water-cooling wall-steam cooling wall integrated structure - Google Patents
Novel boiler water-cooling wall-steam cooling wall integrated structure Download PDFInfo
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- CN117663179A CN117663179A CN202311645293.4A CN202311645293A CN117663179A CN 117663179 A CN117663179 A CN 117663179A CN 202311645293 A CN202311645293 A CN 202311645293A CN 117663179 A CN117663179 A CN 117663179A
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- 238000001816 cooling Methods 0.000 title claims abstract description 160
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 abstract description 26
- 230000008020 evaporation Effects 0.000 abstract description 26
- 238000010521 absorption reaction Methods 0.000 abstract description 18
- 238000013461 design Methods 0.000 abstract description 13
- 238000010438 heat treatment Methods 0.000 abstract description 12
- 230000005484 gravity Effects 0.000 description 6
- 230000005855 radiation Effects 0.000 description 5
- 230000035882 stress Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention discloses a novel boiler water-cooling wall-steam cooling wall integrated structure, which comprises a steam drum, wherein a steam drum outlet is connected with a water-cooling wall inlet header, the water-cooling wall inlet header is connected with a water-cooling wall, the water-cooling wall is connected with a water-cooling wall outlet header, and the water-cooling wall outlet header is connected with the steam drum inlet; the steam drum outlet is connected with the steam cooling wall inlet header, the steam cooling wall inlet header is connected with the steam cooling wall, the steam cooling wall is positioned above the water cooling wall, the steam cooling wall is connected with the steam cooling wall outlet header, and the steam cooling wall outlet header is connected with other superheaters. The invention changes the upper water-cooling wall of the conventional boiler into the steam-cooling wall, and the steam-cooling wall inlet header, the water-cooling wall inlet header and the water-cooling wall outlet header are connected with the steam drum into a whole, thus being matched with good water circulation design and being capable of well solving the contradiction that the evaporation heat absorption requirement is less and the evaporation heating surface is large.
Description
Technical Field
The invention relates to the technical field of boilers, in particular to a novel boiler water-cooling wall-steam-cooling wall integrated structure.
Background
The four walls of the conventional boiler furnace usually adopt a water-cooled wall structure, and the design is suitable for the requirements of the conventional boiler with corresponding pressure and temperature grade and corresponding capacity, in other words, the radiation heat exchange in the conventional water-cooled furnace is suitable for the evaporation heat absorption of undersaturated or saturated water evaporation in the water-cooled wall pipe. However, with the progress of technology and the improvement of the social requirement on environmental protection, various users have more and more demands on boilers with small capacity and high parameters, the radiation heat exchange of a hearth is not matched with the evaporation heat absorption of working media (water), the radiation heat exchange of the hearth is large, the evaporation heat absorption required by the working media is small, and the difficulty of design and development is increased.
Disclosure of Invention
The invention aims to provide a novel boiler water-cooling wall-steam-cooling wall integrated structure so as to solve the problems that the evaporation heat absorption requirement of the existing boiler is low and the evaporation heating surface of a hearth is large in the background art.
In order to solve the technical problems, the invention provides a novel boiler water-cooling wall-steam cooling wall integrated structure, which comprises a steam drum, wherein a steam drum outlet is connected with a water-cooling wall inlet header, the water-cooling wall inlet header is connected with a water-cooling wall, the water-cooling wall is connected with a water-cooling wall outlet header, and the water-cooling wall outlet header is connected with the steam drum inlet;
the steam drum outlet is connected with the steam cooling wall inlet header, the steam cooling wall inlet header is connected with the steam cooling wall, the steam cooling wall is positioned above the water cooling wall, the steam cooling wall is connected with the steam cooling wall outlet header, and the steam cooling wall outlet header is connected with other superheaters.
Further, the water cooling wall is connected with the steam cooling wall through a first connecting piece.
Further, the first connecting piece is flat steel, and the flat steel is used for sealing a gap between the water cooling wall and the steam cooling wall.
Further, the first connecting piece is a sealing piece, and the sealing plate is used for sealing a gap between the water cooling wall and the steam cooling wall.
Further, the water-cooled wall outlet header is connected with the steam-cooled wall inlet header through a second connecting piece.
Further, the second connecting piece is a hoop.
Further, the second connecting piece is an ear plate.
Further, a hanging device is arranged on the water-cooled wall outlet header and is connected with the boiler framework.
The beneficial effects of the invention are as follows: the invention changes the upper water-cooling wall of the conventional boiler into the steam-cooling wall, and the steam-cooling wall inlet header, the water-cooling wall inlet header and the water-cooling wall outlet header are connected with the steam drum into a whole, thereby reducing the load of the water-cooling wall, reducing the damage risk of the water-cooling wall and prolonging the service life of the water-cooling wall. Meanwhile, the structure of the boiler is simplified, and the number of water cooling walls and related pipeline systems are reduced, so that the construction and maintenance cost is reduced. The design is matched with a good water circulation design, the upper water cooling wall is replaced by the steam cooling wall, and the contradiction that the boiler with small capacity and high parameters has less evaporation heat absorption requirement and large evaporation heating surface can be well solved. On the premise of meeting good water circulation, a worker can determine the boundary position of the water cooling wall and the steam cooling wall according to actual needs, and flexibly match and meet the evaporation heat absorption and evaporation heat absorption areas, so that the evaporation heating surface and the overheating heating surface are reasonably distributed and fully utilized, and the cost can be effectively reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the boiler arrangement of the present invention.
Wherein: 1. a steam drum; 2. a water-cooled wall inlet header; 3. a water cooling wall; 4. a water-cooled wall outlet header; 5. an inlet header of the steam cooling wall; 6. a steam cooling wall; 7. an outlet header of the steam cooling wall; 8. a first connector; 9. and a second connecting piece.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only one embodiment of the present invention, not all embodiments. 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 fall within the scope of the invention.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and specific embodiments.
In the following description, references to "one embodiment," "an embodiment," "one example," "an example," etc., indicate that the embodiment or example so described may include a particular feature, structure, characteristic, property, element, or limitation, but every embodiment or example does not necessarily include the particular feature, structure, characteristic, property, element, or limitation. In addition, repeated use of the phrase "according to an embodiment of the present application" does not necessarily refer to the same embodiment, although it may.
As shown in fig. 1-2, the invention discloses a novel boiler water-cooling wall-steam cooling wall integrated structure, which comprises a steam drum 1, wherein an outlet of the steam drum 1 is connected with a water-cooling wall inlet header 2, the water-cooling wall inlet header 2 is connected with a water-cooling wall 3, the water-cooling wall 3 is connected with a water-cooling wall outlet header 4, namely the water-cooling wall inlet header 2 is connected with a water-cooling wall 3 pipeline, the water-cooling wall 3 pipeline is connected with a water-cooling wall outlet header 4, and the water-cooling wall outlet header 4 is connected with an inlet of the steam drum 1.
The outlet of the steam drum 1 is connected with the steam cooling wall inlet header 5, the steam cooling wall inlet header 5 is connected with the steam cooling wall 6, the steam cooling wall 6 is positioned above the water cooling wall 3, the steam cooling wall 6 is connected with the steam cooling wall outlet header 7, namely, the steam cooling wall inlet header 5 is connected with the steam cooling wall 6 through a pipeline, the steam cooling wall 6 through a pipeline is positioned above the water cooling wall 3 through a pipeline, the steam cooling wall 6 through a pipeline is connected with the steam cooling wall outlet header 7, and the steam cooling wall outlet header 7 is connected with other superheaters.
For various reasons, the boiler with small capacity has relatively large hearth and large radiation heat exchange capacity, while the high-parameter evaporation heat absorption is small, namely the area of the water cooling wall 3 is too large, so that the boiler is not matched, and at the moment, a part of the evaporation heat absorption needs to be converted into overheat heat absorption. In the invention, the upper water-cooling wall 3 of the boiler is changed into a steam-cooling wall 6, and a steam-cooling wall inlet header 5 and a steam-cooling wall outlet header 7 are added, the steam-cooling wall inlet header 5, the water-cooling wall inlet header 2 and the water-cooling wall outlet header 4 are all connected with the steam drum 1 into a whole, medium (water and steam) in the water-cooling wall 3 enters the steam drum 1 through the water-cooling wall outlet header 4, steam and water are separated in the steam drum 1, and separated steam enters the steam-cooling wall 6 through the steam-cooling wall inlet header 5 to absorb heat and flows into other superheater heating surfaces through the steam-cooling wall outlet header 7. The separated water enters the water-cooling wall 3 through the water-cooling wall inlet header 2 to absorb heat, and enters the steam drum 1 again through the water-cooling wall outlet header 4.
The invention reduces the load of the water-cooled wall 3, reduces the damage risk of the water-cooled wall 3 and prolongs the service life of the water-cooled wall 3. Meanwhile, the structure of the boiler is simplified, and the number of water cooling walls 3 and related pipeline systems are reduced, so that the construction and maintenance costs are reduced. The design is matched with a good water circulation design, the upper water cooling wall 3 is replaced by the steam cooling wall 6, and the contradiction that the requirements on the evaporation heat absorption capacity of the small-capacity high-parameter boiler are small and the evaporation heating surface is large can be well solved. On the premise of meeting good water circulation, a worker can determine the boundary position of the water cooling wall 3 and the steam cooling wall 6 according to actual needs, flexibly match and meet the evaporation heat absorption and evaporation heat absorption areas, so that the evaporation heating surface and the overheating heating surface are reasonably distributed and fully utilized, and the cost can be effectively reduced.
In one embodiment, the water wall 3 and the steam wall 6 are connected by a first connector 8, i.e. the water wall 3 pipe and the steam wall 6 pipe are connected by the first connector 8.
The first connecting piece 8 is added, and the pipeline of the water cooling wall 3 and the pipeline of the steam cooling wall 6 are connected at adjacent positions (ends) through the first connecting piece 8 to transmit gravity to form a whole. As the flue gas passes through the gap between the water cooling wall 3 and the steam cooling wall 6, the fins at the junction easily exceed the design temperature limit, which can cause deformation, cracking or ablation of materials, so that the fins lose functions, the heat transfer efficiency is affected, and further faults can be caused. The first connecting piece 8 can seal the adjacent part of the water cooling wall 3 and the steam cooling wall 6, and ensure the tightness of the adjacent part, so as to prevent the fin temperature at the joint of the water cooling wall 3 and the steam cooling wall 6 from exceeding the standard.
In one embodiment, the first connection 8 is a flat steel for sealing the gap between the water wall 3 and the steam wall 6. The water-cooled wall 3 pipeline and the steam-cooled wall 6 pipeline are welded together through flat steel, so that firm connection can be provided, and the pipeline can bear the working requirements under the conditions of high temperature and high pressure. The flat steel welded connection can form a firm joint, ensures the connection stability between the water cooling wall 3 and the steam cooling wall 6, can provide good sealing performance, eliminates the gap at the joint and prevents smoke leakage.
In one embodiment, the first connection 8 is a sealing plate for sealing a gap between the water wall 3 and the steam wall 6. The sealing plate is a plate-like material having a sealing property, and is generally used to prevent leakage or permeation of substances such as gas, liquid, dust, or the like. When the fin is applied to the adjacent position of the water-cooling wall 3 and the steam-cooling wall 6, the gap between the water-cooling wall 3 and the steam-cooling wall 6 can be effectively sealed, and the fin temperature at the joint of the water-cooling wall 3 and the steam-cooling wall 6 is ensured not to exceed the standard.
In one embodiment, the water wall outlet header 4 is connected to the steam wall inlet header 5 by a second connection 9. A second connecting piece 9 is added and is used for connecting the water-cooled wall outlet header 4 and the steam-cooled wall inlet header 5, and transmitting the gravity of the lower steam-cooled wall inlet header 5 to the upper water-cooled wall outlet header 4, so that additional support and stability can be provided, the stress and deformation of the wall body are reduced, and the overall structural strength of the boiler system is improved.
In one embodiment, the second connector 9 is a hoop. The hoop connection is generally more compact and can be realized in a limited space, thereby meeting the design requirements. The hoop connection is used, so that the connection between the water-cooled wall outlet header 4 and the steam-cooled wall inlet header 5 is simpler and more convenient, the time and the workload of installation and disassembly are reduced, and the working efficiency is improved. The hoop connection may provide some flexibility in thermal expansion of the wall. Since thermal expansion is unavoidable, the use of a hoop connection allows a certain deformation space of the wall during thermal expansion at high temperature, reducing the risk of cracking and damage due to thermal stresses. The hoop connection can uniformly disperse pressure loading to the contact surface between the water-cooled wall outlet header 4 and the steam-cooled wall inlet header 5. This helps to reduce stress concentrations and improve the strength and stability of the connection.
In one embodiment, the second connector 9 is an ear plate. The ear plates are typically made of thicker metal plates and can withstand greater forces and pressures, thereby ensuring reliability of the connection. And the anti-seismic performance of the system can be improved, the stress is effectively dispersed and absorbed, and the deformation and damage risk of the structure are reduced. When repair or replacement of one of the header tanks is required, the two header tanks can be separated by loosening the ear plate bolts without disassembling the entire connection. When the water wall outlet header 4 and the steam wall inlet header 5 are thermally expanded, the ear plate connection may allow a certain relative movement, reducing the risk of damage and breakage due to thermal stresses.
In one embodiment, the water wall outlet header 4 is provided with hanging means connected to the boiler frame. Namely, the water-cooled wall outlet header 4 and the steam-cooled wall inlet header 5 enable the steam-cooled wall inlet header 5 below the water-cooled wall outlet header 4 to act on the water-cooled wall outlet header 4 by gravity through the second connecting piece 9, and then the gravity of the water-cooled wall outlet header 4 and the steam-cooled wall inlet header 5 is transferred to a boiler frame through a hanging device acting on the water-cooled wall outlet header 4, wherein the hanging device is in the prior art and is not repeated here.
The water-cooled wall outlet header 4 is connected with the boiler framework by adopting a hanging device, so that the stability and the strength of the water-cooled wall outlet header can be improved, and the water-cooled wall outlet header is prevented from displacement or deformation. The weight and the pressure of the water-cooled wall outlet header 4 and the steam-cooled wall inlet header 5 are balanced and shared, the load of the water-cooled wall outlet header is lightened, and the service life of the water-cooled wall inlet header is prolonged. Meanwhile, the water-cooled wall outlet header 4 and the steam-cooled wall inlet header 5 can be prevented from accidentally falling off or falling down in the running process, and potential safety risks are reduced.
The design idea of the invention is as follows:
the upper water-cooling wall 3 of the conventional boiler is changed into a steam-cooling wall 6, and a steam-cooling wall inlet header 5 and a steam-cooling wall outlet header 7 are added, wherein the steam-cooling wall inlet header 5, the water-cooling wall inlet header 2 and the water-cooling wall outlet header 4 are all connected with the steam drum 1. The first connecting piece 8 is added, and the pipeline of the water-cooled wall 3 and the pipeline of the steam-cooled wall 6 are connected at adjacent positions (end parts) through the first connecting piece 8 to transfer gravity, so that the lower water-cooled wall 3 and the upper steam-cooled wall 6 are further combined into a whole. At the same time, the first connecting piece 8 can seal adjacent parts and ensure the tightness of the adjacent parts, so as to prevent the fins at the joint of the water cooling wall 3 and the steam cooling wall 6 from exceeding the design temperature limit thereof to cause deformation, cracking or ablation of materials, thereby losing the functions of the fins, affecting the heat transfer efficiency and possibly causing further faults. A second connecting piece 9 is added for connecting the water-cooled wall outlet header 4 and the steam-cooled wall inlet header 5, and transmitting the gravity of the lower steam-cooled wall inlet header 5 to the upper water-cooled wall outlet header 4 to provide additional support and stability, thereby reducing the stress and deformation of the wall body and improving the overall structural strength of the boiler system.
The invention is suitable for the design and development of a boiler with small capacity and high parameters, which requires a larger volume of a hearth and a heat absorption of evaporation required by working media smaller than radiation heat exchange of the hearth, such as a subcritical boiler with main steam flow of about 220t/h and below and steam outlet temperature of 571 ℃ and above.
The water-cooling wall-steam-cooling wall integrated structure is well matched with a good water circulation design, and the upper water-cooling wall 3 is replaced by the steam-cooling wall 6, so that the contradiction that the evaporation heat absorption requirement is less and the evaporation heating surface is large can be well solved. On the premise of meeting good water circulation, a worker can determine the boundary position of the water cooling wall 3 and the steam cooling wall 6 according to actual needs, flexibly match and meet the evaporation heat absorption and evaporation heat absorption areas, so that the evaporation heating surface and the overheating heating surface are reasonably distributed and fully utilized, and the cost can be effectively reduced.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. Novel boiler water-cooled wall-vapour cold wall integrated structure, its characterized in that: the device comprises a steam drum, wherein the outlet of the steam drum is connected with a water-cooled wall inlet header, the water-cooled wall inlet header is connected with a water-cooled wall, the water-cooled wall is connected with a water-cooled wall outlet header, and the water-cooled wall outlet header is connected with the steam drum inlet;
the steam drum outlet is connected with the steam cooling wall inlet header, the steam cooling wall inlet header is connected with the steam cooling wall, the steam cooling wall is positioned above the water cooling wall, the steam cooling wall is connected with the steam cooling wall outlet header, and the steam cooling wall outlet header is connected with other superheaters.
2. The novel boiler water wall-steam cooled wall integrated structure according to claim 1, wherein: the water cooling wall is connected with the steam cooling wall through a first connecting piece.
3. The novel boiler water wall-steam cooled wall integrated structure according to claim 2, wherein: the first connecting piece is flat steel, and the flat steel is used for sealing a gap between the water cooling wall and the steam cooling wall.
4. The novel boiler water wall-steam cooled wall integrated structure according to claim 2, wherein: the first connecting piece is a sealing plate, and the sealing plate is used for sealing a gap between the water cooling wall and the steam cooling wall.
5. The novel boiler water wall-steam cooled wall integrated structure according to claim 1, wherein: the water-cooled wall outlet header is connected with the steam-cooled wall inlet header through a second connecting piece.
6. The novel boiler water wall-steam cooled wall integrated structure according to claim 5, wherein: the second connecting piece is a hoop.
7. The novel boiler water wall-steam cooled wall integrated structure according to claim 5, wherein: the second connecting piece is an ear plate.
8. The novel boiler water wall-steam cooled wall integrated structure according to claim 1, wherein: the water-cooled wall outlet header is provided with a hanging device, and the hanging device is connected with the boiler framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311645293.4A CN117663179A (en) | 2023-12-04 | 2023-12-04 | Novel boiler water-cooling wall-steam cooling wall integrated structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311645293.4A CN117663179A (en) | 2023-12-04 | 2023-12-04 | Novel boiler water-cooling wall-steam cooling wall integrated structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117663179A true CN117663179A (en) | 2024-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311645293.4A Pending CN117663179A (en) | 2023-12-04 | 2023-12-04 | Novel boiler water-cooling wall-steam cooling wall integrated structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117663179A (en) |
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2023
- 2023-12-04 CN CN202311645293.4A patent/CN117663179A/en active Pending
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