Novel boiler water-cooled wall tube unit and water-cooled wall tube group

Abstract

The utility model relates to the field of boiler water-cooled walls, in particular to a novel boiler water-cooled wall tube unit and a water-cooled wall tube group. The novel boiler water-cooled wall tube unit and the water-cooled wall tube set comprise water-cooled wall tubes, fins, connecting plates and blocking strips, the water-cooled wall tubes are arranged at equal intervals, the fire-facing sides of the water-cooled wall tubes are provided with corrosion-resistant coatings, the fins are arranged on the fire-facing sides of the water-cooled wall tubes, the fins on the edges are fixedly connected through first connecting bolts, the outer walls of the first connecting bolts are sleeved with blocking sleeves, and the blocking strips are arranged on the outer walls of the first connecting bolts. The blocking sleeve is fixedly connected with the first connecting bolt through a nut, the connecting plate is installed between the two fins, second connecting bolts are symmetrically and fixedly connected at equal intervals, and first through holes are symmetrically formed in the two sides of the fins at equal intervals. By optimizing the installation process and improving the stability, shutdown and maintenance time caused by improper installation and maintenance are reduced, and the operation efficiency of the boiler is improved; and meanwhile, the installation cost and the maintenance cost are reduced, funds are saved for enterprises, and the competitiveness is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of boiler water-cooled walls, in particular to a novel boiler water-cooled wall tube unit and a water-cooled wall tube group. Background Art

[0002] In the boiler industry, water-cooled wall tubes, as one of the key components of the boiler, undertake the important tasks of cooling the furnace, protecting the furnace wall and maintaining the normal operation of the boiler. Traditional water-cooled wall tube designs often suffer from corrosion, wear and deformation under long-term high temperature, high pressure and corrosive environments, which not only affects the operating efficiency of the boiler, but also increases maintenance costs and safety hazards.

[0003] Traditional water-cooled wall tube installation methods usually face problems such as difficult installation, high cost, and long time consumption, especially in high-temperature and highly corrosive environments, where these problems are more prominent; in addition, traditionally designed water-cooled wall tubes are often difficult to adapt to the complex thermal and mechanical stress changes in the furnace after installation, and are prone to safety hazards such as deformation and leakage.

[0004] Therefore, it is necessary to provide a new type of boiler water-cooled wall tube unit and water-cooled wall tube group to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a novel boiler water-cooled wall tube unit and a water-cooled wall tube group.

[0006] First aspect: The new type of boiler water-cooled wall tube unit and water-cooled wall tube group provided by the utility model include: water-cooled wall tubes, fins, connecting plates and blocking strips. The water-cooled wall tubes are equidistantly arranged, and the fire-facing side thereof is provided with a corrosion-resistant coating. The fins are arranged on the fire-facing side of the water-cooled wall tubes, and the edge fins are fixedly connected by a first connecting bolt. The outer wall sleeve of the first connecting bolt is provided with a blocking sleeve, and the blocking sleeve is fixedly connected to the first connecting bolt by a nut. The connecting plate is installed between the two fins, and is equidistantly and symmetrically fixedly connected with a second connecting bolt. First through holes are symmetrically and equidistantly opened on both sides of the fin, and the second connecting bolt on the connecting plate passes through the first through holes of the fin and is fixedly connected by a nut. The blocking strip is arranged between the back-fire sides of two adjacent water-cooled wall tubes, and second through holes are symmetrically opened on the blocking strip. The second connecting bolt passes through the second through holes on the blocking strip and is fixedly connected by a nut.

[0007] Preferably, a wear-resistant sheet is provided between the fin and the water-cooled wall tube.

[0008] Preferably, the hole distances of the first through hole and the second through hole are both larger than the diameters of the first connecting bolt and the second connecting bolt to facilitate installation and thermal expansion.

[0009] Preferably, the diameter of the groove in the barrier sleeve is larger than the diameter of the water-cooled wall tube.

[0010] Preferably, the fins are made of carbon steel.

[0011] Preferably, a gap is left between two adjacent fins to allow sufficient space for thermal expansion.

[0012] In the first aspect: the present application provides a novel boiler water-cooled wall tube unit, in which rows of water-cooled wall tubes are composed of four sides to form a water-cooled wall tube unit.

[0013] Compared with the related art, the new boiler water-cooled wall tube unit and water-cooled wall tube group provided by the utility model have the following beneficial effects:

[0014] First, in terms of installation, the modular and standardized design concept greatly simplifies the installation process of the water-cooled wall tube group; this design reduces the complexity and workload of the installation process, improves installation efficiency, and reduces installation costs; at the same time, the standardized design also ensures the compatibility and interchangeability between the various water-cooled wall tube group units, which is convenient for subsequent maintenance and replacement;

[0015] Secondly, the design of the new water-cooled wall tube group fully considers stability and reliability; the setting of corrosion-resistant coating and fins effectively improves the corrosion resistance and heat conduction efficiency of the water-cooled wall tubes, so that the water-cooled wall tubes can still maintain stable performance in harsh environments; in addition, the setting of gaps between fins and barrier strips further enhances the thermal stability and safety of the water-cooled wall tube group, reducing the risk of deformation and leakage caused by changes in thermal and mechanical stress;

[0016] Finally, the design of the new water-cooled wall tube group has also brought about improved economic benefits; by optimizing the installation process and improving stability, it has reduced downtime and repair time caused by improper installation and maintenance, and improved the operating efficiency of the boiler; at the same time, the reduced installation and maintenance costs have also saved money for the company and enhanced its competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a new boiler water-cooled wall tube unit and a water-cooled wall tube group provided by the utility model;

[0018] Figure 2 for Figure 1 One of the structural schematic diagrams of the fin shown;

[0019] Figure 3 for Figure 1 The second schematic diagram of the structure of the fin shown;

[0020] Figure 4 for Figure 1 Schematic diagram of the structure of the water-cooled wall tube cross section shown.

[0021] Numbers in the figure: 1, water-cooled wall tube; 2, corrosion-resistant coating; 3, fin; 4, first connecting bolt; 5, blocking sleeve; 6, connecting plate; 7, second connecting bolt; 8, first through hole; 9, blocking strip; 10, second through hole; 11, wear-resistant sheet. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments. Example

[0024] See also Figures 1 to 4 The novel water-cooled wall tube group includes: a water-cooled wall tube 1, a fin 3, a connecting plate 6 and a blocking strip 9. The water-cooled wall tube 1 is arranged equidistantly, and a corrosion-resistant coating 2 is provided on the fire-facing side of the water-cooled wall tube 1. The fin 3 at the edge is fixedly connected by a first connecting bolt 4. The outer wall sleeve of the first connecting bolt 4 is provided with a blocking sleeve 5. The blocking sleeve 5 is fixedly connected to the first connecting bolt 4 through a nut. The connecting plate 6 is installed between two fins 3 and is equidistantly and symmetrically fixedly connected with a second connecting bolt 7. First through holes 8 are symmetrically and equidistantly opened on both sides of the fin 3. The second connecting bolt 7 on the connecting plate 6 passes through the first through hole 8 of the fin 3 and passes through The blocking strip 9 is fixedly connected by nuts, and is arranged between the back-fire sides of two adjacent water-cooled wall tubes 1. The blocking strip 9 is symmetrically provided with second through holes 10, and the second connecting bolt 7 passes through the second through hole 10 on the blocking strip 9 and is fixedly connected by nuts. A wear-resistant sheet 11 is arranged between the fin 3 and the water-cooled wall tube 1, and the hole spacing of the first through hole 8 and the second through hole 10 is larger than the diameter of the first connecting bolt 4 and the second connecting bolt 7 to facilitate installation and thermal expansion. The diameter of the groove in the blocking sleeve 5 is larger than the diameter of the water-cooled wall tube 1, and the fin 3 is made of carbon steel, and a gap is left between two adjacent fins 3 to allow sufficient space for thermal expansion.

[0025] See also Figure 1 The novel boiler water-cooled wall tube unit: rows of water-cooled wall tubes 1 are composed of four sides to form a water-cooled wall tube unit.

[0026] The working principle of the new boiler water-cooled wall tube unit and water-cooled wall tube group provided by the utility model is as follows:

[0027] Firstly, the new water-cooled wall tube group 1 is composed of a number of water-cooled wall tubes 1 arranged at equal distances, and these water-cooled wall tubes 1 are fixedly connected by connecting plates 6 and connecting bolts to form a stable overall structure; this modular and standardized design enables the water-cooled wall tube group 1 to be positioned quickly and accurately during installation, and the construction of the entire water-cooled wall system can be completed through a simple assembly process;

[0028] Secondly, the fire-facing side of the water-cooled wall tube 1 is provided with a corrosion-resistant coating 2 and fins 3, which are the key to ensure the stable operation of the water-cooled wall tube 1 in a harsh environment; the corrosion-resistant coating 2 can effectively resist the erosion of high temperature, corrosive gas and ash in the furnace, and extend the service life of the water-cooled wall tube 1; and the fins 3 increase the surface area of ​​the water-cooled wall tube 1, improve the heat conduction efficiency, so that the water-cooled wall tube 1 can transfer the heat in the furnace to the cooling medium more quickly, thereby maintaining the stability of the furnace temperature;

[0029] During operation, the cooling medium (such as water or steam) flows through the water-cooled wall tube 1 to absorb the heat in the furnace. Due to the presence of the fins 3, the contact area between the cooling medium and the fins 3 is increased, and the heat conduction efficiency is improved, so that the water-cooled wall tube 1 can more effectively reduce the furnace temperature. At the same time, the gaps between the fins 3 and the setting of the blocking strips 9 can prevent the flame in the furnace from directly scouring the water-cooled wall tube 1, reduce the influence of thermal stress and mechanical stress, and maintain the stability of the water-cooled wall tube 1.

[0030] In addition, the fixed connection mode of the connection plate 6 and the connection bolts enables the water-cooled wall tube 1 group to maintain a stable structural form during operation; the connection plate 6 is fixed by the second connection bolts 7 passing through the through holes on the fins 3 and the blocking strips 9, ensuring the tight connection and overall stability between the water-cooled wall tubes 1 group; this connection mode also allows the water-cooled wall tubes 1 group to have a certain amount of activity space when they expand due to heat, avoiding deformation and leakage problems caused by thermal stress;

[0031] In summary, the new boiler water-cooled wall tube group 1 proposed by the present technology realizes the function of efficiently and stably reducing the furnace temperature through modular and standardized design, the setting of the corrosion-resistant coating 2 and the fins 3, and the fixed connection method of the connecting plate 6 and the connecting bolts, and ensures the long-term stable operation of the water-cooled wall tube group 1 in harsh environments.

[0032] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A new type of boiler water-cooled wall tube group, characterized in that: include: Water-cooled wall tubes (1), the water-cooled wall tubes (1) being arranged at equal intervals and having a corrosion-resistant coating (2) on the fire-facing side; The fins (3) are arranged on the fire-facing side of the water-cooled wall tube (1); the fins (3) at the edges are fixedly connected via first connecting bolts (4); a blocking sleeve (5) is provided on the outer wall of the first connecting bolt (4); and the blocking sleeve (5) is fixedly connected to the first connecting bolt (4) via a nut; A connecting plate (6) is installed between the two fins (3) and is symmetrically and equidistantly fixedly connected with second connecting bolts (7); first through holes (8) are symmetrically and equidistantly opened on both sides of the fins (3); the second connecting bolts (7) on the connecting plate (6) pass through the first through holes (8) of the fins (3) and are fixedly connected by nuts; A blocking bar (9) is arranged between the back-fire sides of two adjacent water-cooled wall tubes (1), and second through holes (10) are symmetrically provided on the blocking bar (9). The second connecting bolts (7) pass through the second through holes (10) on the blocking bar (9) and are fixedly connected by nuts.

2. The new boiler water-cooled wall tube group according to claim 1 is characterized in that: A wear-resistant sheet (11) is provided between the fin (3) and the water-cooled wall tube (1).

3. The new boiler water-cooled wall tube group according to claim 1 is characterized in that: The hole spacing of the first through hole (8) and the second through hole (10) is greater than the diameter of the first connecting bolt (4) and the second connecting bolt (7), so as to facilitate installation and thermal expansion.

4. The new boiler water-cooled wall tube group according to claim 1 is characterized in that: The diameter of the groove in the blocking sleeve (5) is greater than the diameter of the water-cooled wall tube (1).

5. The novel boiler water-cooled wall tube group according to claim 1 is characterized in that: The fin (3) is made of carbon steel.

6. The novel boiler water-cooled wall tube group according to claim 1 is characterized in that: A gap is left between two adjacent fins (3) to allow sufficient space for expansion when heated.

7. A new type of boiler water-cooled wall tube unit, characterized in that: The unit is composed of a number of new boiler water-cooled wall tube groups as described in any one of claims 1 to 6, and the rows of water-cooled wall tubes (1) are composed of four sides to form a water-cooled wall tube unit.

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