Hearth outlet anti-abrasion device and corner tube hot water boiler
The furnace outlet anti-wear device for corner tube hot water boilers addresses wear and leakage issues by using angled wear-resistant steel plates and a vortex mechanism, enhancing service life and combustion efficiency.
Patent Information
- Application Number
- CN202420773111.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-15
AI Technical Summary
Corner tube hot water boilers experience wear and leakage at the furnace outlet due to high flue gas temperature and velocity, leading to reduced service life and frequent repairs.
A furnace outlet anti-wear device using wear-resistant flat steel plates arranged at an angle with a turbulent space and anti-expansion crack grooves to prevent wear and form a vortex, reducing uneven heating and thermal deformation, and incorporating a partition to separate combustion and heating chambers.
Extends the service life of heating tubes by 4 to 8 heating periods, reduces material loss, and enhances combustion efficiency by forming a vortex to burn large ash and gas particles, while maintaining uniform heating and reducing emissions.
Smart Images
Figure CN222278649U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boilers, and in particular to a furnace outlet anti-wear device and a corner tube hot water boiler. Background Art
[0002] In recent years, as the country advocates green development, the efforts to save energy, reduce emissions and protect the environment have continued to increase, small coal-fired boilers have been eliminated, and medium and large boilers are mostly used for heating. Among them, corner tube coal-fired boilers are used for centralized heating in cities, and the effect is very ideal. The furnace burns vigorously and the heating surface is sufficient, but at the furnace outlet smoke window, due to the high flue gas temperature and high flue gas velocity, the pipes at the furnace outlet are easily heated and worn, resulting in water leakage. Utility Model Content
[0003] The utility model provides a furnace outlet anti-wear device and an angle tube hot water boiler, which solves the problem of leakage of heated tubes and short service life caused by furnace outlet wear of angle tube hot water boilers in the related art.
[0004] The technical solution of the utility model is as follows:
[0005] The furnace outlet anti-wear device is used to prevent the heating tubes at the furnace outlet of the corner tube hot water boiler from being worn by the furnace ash and flue gas, including
[0006] The wear-resistant flat steel is in plate shape, one end of which is arranged on the heated tube and the other end is a free end. The free end and the furnace outlet are respectively located on both sides of the heated tube. There are two or more wear-resistant flat steels, and two adjacent ones are arranged at an angle.
[0007] As a further technical solution, a turbulent space is provided between two adjacent anti-wear flat steels, so that the ash and flue gas can form a vortex in the turbulent space.
[0008] As a further technical solution, an anti-expansion crack groove is provided between the anti-wear flat steel and the heated pipe, and the length direction of the anti-expansion crack groove is parallel to the length direction of the anti-wear flat steel.
[0009] As a further technical solution, the anti-expansion crack groove is communicated with the turbulent flow space and has a plurality of openings, and the openings lead to the furnace outlet.
[0010] As a further technical solution, the heated pipe is a carbon steel pipe, and the wear-resistant flat steel is heat-resistant and wear-resistant flat steel.
[0011] As a further technical solution, the anti-expansion crack groove is arc-shaped, and both sides of the anti-expansion crack groove are close to the furnace outlet towards the middle.
[0012] Corner tube hot water boiler, including furnace outlet anti-wear device, also includes
[0013] A furnace shell, wherein the furnace shell has a furnace cavity,
[0014] a partition, the partition being arranged in the furnace cavity, the partition dividing the furnace cavity into a combustion cavity and a heating cavity, the heating cavity being connected with the combustion cavity through the furnace outlet of the corner tube hot water boiler,
[0015] The heat receiving pipe is arranged in the heating chamber and extends to the furnace outlet.
[0016] As a further technical solution, a turbulent flow space is provided between two adjacent anti-wear flat steels, and the turbulent flow space faces the combustion chamber.
[0017] As a further technical solution, the partition has a heat collecting surface, and the heat collecting surface is inclined toward the combustion chamber.
[0018] The working principle and beneficial effects of the utility model are:
[0019] The utility model designs an anti-wear flat steel to prevent the heating pipe at the furnace outlet of the corner tube hot water boiler from being worn and broken by the furnace ash and smoke. The anti-wear flat steel is a plate shape and can be welded on the heating pipe to avoid tearing caused by welding. The anti-wear parts in the prior art are welded on the heating pipe for anti-wear, but the anti-wear parts are welded on the heating pipe, and the thickness of the heating pipe at the welding part of the anti-wear parts is increased due to the anti-wear parts, resulting in uneven heating at different positions of the heating pipe when the corner tube hot water boiler is heated, and the influence of heat conduction is large, thereby causing different thermal deformations of different parts of the heating pipe, thereby causing uneven changes in the material hardness of different parts of the heating pipe when the corner tube hot water boiler of the prior art is heated, and the part with reduced hardness is pitted under the action of the furnace ash and smoke. After long-term use, the pitted part gradually expands, causing water leakage in the heating pipe, and the water leakage places are mostly on the upper and lower sides of the heating pipe. According to existing data statistics, the heating pipe needs to be repaired after each heating period. The anti-wear flat steel is arranged on the side of the heated pipe, and the welding part is the long direction of the anti-wear flat steel. It has fewer connection structures, which can ensure that the heated pipe will not be heated unevenly due to welding, thereby avoiding the overall hardness of the heated pipe from being reduced due to temperature difference, and reducing the leakage caused by the expansion of pitting corrosion of the heated pipe. Because the anti-wear flat steel is arranged at an angle, the ash and flue gas cannot act on the upper and lower sides of the heated pipe, thereby avoiding wear and leakage of the heated pipe. It has a simple structure and lower cost than traditional anti-wear parts, which extends the service life of the heated pipe. After actual use, the furnace outlet anti-wear device using anti-wear steel plate extends the service life of the heated pipe by 4 to 8 heating periods. The design of the free end can also reduce material loss caused by welding. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.
[0021] Figure 1 This is a schematic diagram of the assembly structure of the heat-receiving pipe and the anti-wear flat steel in the utility model;
[0022] Figure 2 This is a schematic diagram of the anti-wear flat steel structure in the utility model;
[0023] Figure 3 It is a schematic diagram of the structure of the utility model;
[0024] Figure 4 for Figure 3 A magnified view of middle;
[0025] In the figure: heated tube 1, anti-wear flat steel 2, free end 201, turbulent space 3, anti-expansion and cracking groove 4, through-port 5, furnace shell 6, furnace chamber 603, combustion chamber 601, heating chamber 602, partition 7, heat collecting surface 701, furnace outlet 8. DETAILED DESCRIPTION
[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.
[0027] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".
[0028] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0029] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0030] Example 1
[0031] Reference Figure 1~Figure 4 , which is the first embodiment of the utility model, proposes
[0032] The furnace outlet anti-wear device is used to prevent the heating tube 1 at the furnace outlet (8) of the corner tube hot water boiler from being worn by the furnace ash and flue gas, comprising:
[0033] The wear-resistant flat steel 2 is in the form of a plate, one end of which is arranged on the heat receiving tube 1 and the other end is a free end 201. The free end 201 and the furnace outlet (8) are respectively located on both sides of the heat receiving tube 1. There are two or more wear-resistant flat steels 2, and two adjacent ones are arranged at an angle.
[0034] In this embodiment, an anti-wear flat steel 2 is designed to prevent the heating tube 1 at the furnace outlet (8) of the angle tube hot water boiler from being worn and broken by the furnace ash and flue gas. The anti-wear flat steel 2 is in the form of a plate and can be welded to the heating tube to avoid tearing caused by welding. In the prior art, the anti-wear parts are coated and welded on the heating tube 1 for anti-wear. However, the anti-wear parts are welded on the heating tube 1. The thickness of the heating tube 1 at the welding part of the anti-wear parts is increased due to the anti-wear parts, resulting in uneven heating of different positions of the heating tube 1 when the angle tube hot water boiler is heated. The heat conduction is greatly affected, resulting in different thermal deformation of different parts of the heating tube 1. In turn, the material hardness of different parts of the heating tube 1 changes unevenly when the angle tube hot water boiler of the prior art is heated. The part with reduced hardness is pitted under the action of the furnace ash and flue gas. After long-term use, the pitted part gradually expands, causing the heating tube 1 to leak. The leaking parts are mostly on the upper and lower sides of the heating tube. According to statistics, the heating tube needs to be repaired after each heating period. The wear-resistant flat steel 2 is arranged on the side of the heated tube 1, and the welding part is the length edge direction of the wear-resistant flat steel 2. It has fewer connection structures, which can ensure that the heated tube 1 will not be heated unevenly due to welding, thereby avoiding the overall hardness of the heated tube 1 from being reduced due to temperature differences, and reducing the leakage caused by the expansion of pitting corrosion of the heated tube 1. Because the wear-resistant flat steel 2 is arranged at an angle, the ash and flue gas cannot act on the upper and lower sides of the heated tube 1, thereby avoiding the wear and leakage of the heated tube 1. It has a simple structure and a lower cost than traditional anti-wear parts, which extends the service life of the heated tube 1. After actual use, the furnace outlet anti-wear device using wear-resistant steel plates extends the service life of the heated tube 1 by 4 to 8 heating periods. The design of the free end 201 can also reduce material loss caused by welding.
[0035] Furthermore, a turbulent space 3 is provided between two adjacent anti-wear flat steels 2 , so that the ash and smoke can form a vortex in the turbulent space 3 .
[0036] In this embodiment, the ash and flue gas forms a vortex under the action of the anti-wear flat steel 2. Under the action of the vortex, the large particles of the ash and flue gas cannot contact the heated tube 1. Under the action of the vortex, the ash and flue gas collides with the anti-wear flat steel 2 and rebounds to the combustion area, thereby further avoiding the wear of the heated tube 1 and extending the service life of the heated tube 1. Compared with traditional anti-wear parts, the vortex in the turbulent space 3 can further burn large particles of ash and flue gas, reduce the emission of ash and flue gas, and further increase the calorific value generated by coal combustion.
[0037] Furthermore, an anti-expansion crack groove 4 is provided between the anti-wear flat steel 2 and the heated pipe 1 , and the length direction of the anti-expansion crack groove 4 is parallel to the length direction of the anti-wear flat steel 2 .
[0038] In this embodiment, taking into account the different materials of the wear-resistant flat steel 2 and the heated tube 1, and the different thermal expansion coefficients of the wear-resistant flat steel 2 and the heated tube 1 when heated, in order to avoid the tearing of the heated tube 1 due to the different thermal expansion coefficients of the wear-resistant flat steel 2 and the heated tube 1 when heated, an anti-expansion crack groove is designed, and the anti-expansion crack groove is used to compensate for the expansion volume caused by the thermal expansion coefficient, wherein the length direction is the same as the length direction of the heated tube 1.
[0039] Furthermore, the anti-expansion crack groove 4 is connected to the turbulent space 3 and has a plurality of through openings 5, and the through openings 5 lead to the furnace outlet (8).
[0040] In this embodiment, the wear-resistant steel plate is welded on the heated tube 1, the welding surface is located on the other side of the anti-expansion crack groove, the welding part is intermittent welding, and the through-port 5 part is the unwelded part. The design of the through-port 5 can not only further compensate for the expansion of the heated tube 1 and the wear-resistant steel plate, but also reduce the welding cost.
[0041] Furthermore, the heated pipe 1 is a carbon steel pipe, and the wear-resistant flat steel 2 is a heat-resistant and wear-resistant flat steel.
[0042] In this embodiment, the heated pipe 1 is a carbon steel pipe, which has good thermal conductivity. The heat-resistant and wear-resistant flat steel can effectively extend the service life of the wear-resistant flat steel 2.
[0043] Furthermore, the anti-expansion crack groove 4 is arc-shaped, from both sides of the anti-expansion crack groove 4 to the middle close to the furnace outlet 8.
[0044] In this embodiment, the other side of the wear-resistant flat steel 2 is grinded before welding. The grinded wear-resistant flat steel 2 has an arc-shaped surface. The arc-shaped surface after welding abuts against the heated tube 1, which is convenient for the welding of the wear-resistant flat steel 2 and the formation of the anti-expansion crack groove. The wear-resistant flat steel 2 after welding is easily deformed by heat. The arc-shaped grinded surface can compensate for the deformation of the wear-resistant flat steel 2 deformed by heat. After welding, the anti-expansion crack groove is close to the furnace outlet 8 from both sides to the middle. The arc-shaped anti-expansion crack groove can make the slightly deformed wear-resistant flat steel 2 and the heated tube 1 get better expansion compensation. Its structure is simple and easy to process.
[0045] Example 2
[0046] Reference Figure 3 , which is the second embodiment of the utility model,
[0047] Corner tube hot water boiler, including furnace outlet anti-wear device, also includes
[0048] The furnace shell 6 has a furnace chamber 603.
[0049] The partition 7 is arranged in the furnace chamber 603. The partition 7 divides the furnace chamber 603 into a combustion chamber 601 and a heating chamber 602. The heating chamber 602 is connected with the combustion chamber 601 through the furnace outlet 8 of the angle tube hot water boiler.
[0050] The heat receiving tube 1 is arranged in the heating chamber 602 and extends to the furnace outlet 8 .
[0051] In the present embodiment, a partition 7 is designed to divide the furnace chamber 603 into a combustion chamber 601 and a heating chamber 602. The design of the partition 7 can prevent the heat receiving tube 1 from being directly heated by the flame, thereby extending the service life of the heat receiving tube 1. The heat receiving tube 1 extends to the furnace outlet 8, which can make the heat receiving tube 1 absorb more heat, thereby reducing the heat loss during the use of the corner tube hot water boiler. The setting of the heating chamber 602 can make the ash and flue gas whose calorific value has been consumed use the waste heat to the heat receiving tube 1 in the heating chamber 602, thereby further reducing the calorific value loss caused by combustion.
[0052] Furthermore, a turbulent flow space 3 is provided between two adjacent anti-wear flat steels 2 , and the turbulent flow space 3 faces the combustion chamber 601 .
[0053] In this embodiment, the turbulent space 3 faces the combustion chamber 601, which prevents the dust dropped after the ash and smoke in the turbulent space 3 are burned from entering the heating chamber 602, making it easier for maintenance personnel to clean the heating chamber 602.
[0054] Furthermore, the partition 7 has a heat collecting surface 701 , and the heat collecting surface 701 is inclined toward the combustion chamber 601 .
[0055] In this embodiment, the partition 7 has a heat collecting surface 701, which blocks the heat in the combustion chamber 601, so that the temperature of the ash and smoke is further increased, and the coal is burned more completely.
[0056] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A furnace outlet anti-wear device, used to prevent the heating tube (1) at the furnace outlet (8) of the corner tube hot water boiler from being worn by the furnace ash and flue gas, characterized in that: include Anti-wear flat steel (2), the anti-wear flat steel (2) is in the form of a plate, one end of which is arranged on the heat receiving tube (1), and the other end of which is a free end (201), the free end (201) and the furnace outlet (8) are respectively located on both sides of the heat receiving tube (1), and the anti-wear flat steel (2) is two or more, and two adjacent ones are arranged at an angle; A turbulent flow space (3) is provided between two adjacent anti-wear flat steels (2), and is used for the ash and smoke to form a vortex in the turbulent flow space (3); An anti-expansion crack groove (4) is provided between the anti-wear flat steel (2) and the heated pipe (1), and the length direction of the anti-expansion crack groove (4) is parallel to the length direction of the anti-wear flat steel (2).
2. The furnace outlet anti-wear device according to claim 1, characterized in that: The anti-expansion crack groove (4) is in communication with the turbulent flow space (3) and also has a plurality of through openings (5), wherein the through openings (5) lead to the furnace outlet (8).
3. The furnace outlet anti-wear device according to claim 1, characterized in that: The heated pipe (1) is a carbon steel pipe, and the wear-resistant flat steel (2) is heat-resistant and wear-resistant flat steel.
4. The furnace outlet anti-wear device according to claim 1, characterized in that: The anti-expansion crack groove (4) is arc-shaped, and the two sides of the anti-expansion crack groove (4) are close to the furnace outlet (8) towards the middle.
5. Angle tube hot water boiler, characterized in that: The furnace outlet anti-wear device comprises the furnace outlet anti-wear device according to any one of claims 1 to 4, and further comprises A furnace shell (6), wherein the furnace shell (6) has a furnace cavity (603), a partition (7), the partition (7) being arranged in the furnace cavity (603), the partition (7) dividing the furnace cavity (603) into a combustion cavity (601) and a heating cavity (602), the heating cavity (602) being in communication with the combustion cavity (601) via the furnace outlet (8) of the corner tube hot water boiler, The heat receiving tube (1) is arranged in the heating chamber (602) and extends to the furnace outlet (8).
6. The angle tube hot water boiler according to claim 5, characterized in that: A turbulent flow space (3) is provided between two adjacent anti-wear flat steels (2), and the turbulent flow space (3) faces the combustion chamber (601).
7. The angle tube hot water boiler according to claim 5, characterized in that: The partition plate (7) has a heat collecting surface (701), and the heat collecting surface (701) is arranged to be inclined toward the combustion chamber (601).