Novel structure for supporting tail furnace wall of circulating fluidized bed boiler

Abstract

The utility model discloses a novel structure of a circulating fluidized bed boiler tail furnace wall support. Relates to the field of circulating fluidized bed boilers. According to an existing bracket structure, high precision and professional technology are generally needed for installation, the installation process is complex, and the construction time and cost are possibly increased, so that the novel structure for supporting the tail furnace wall of the circulating fluidized bed boiler is provided. The novel structure of the furnace wall support comprises a tail furnace wall and a supporting beam, the supporting beam is arranged on the outer side of the tail furnace wall, wear-resistant and fire-resistant plastic materials are arranged between a supporting area of the tail furnace wall and the supporting beam, the novel structure of the furnace wall support further comprises Y-shaped grasping nails, V-shaped grasping nails and channel steel, a set of V-shaped grasping nails are symmetrically connected to the rod face of each Y-shaped grasping nail, and the channel steel is arranged between the supporting area of the tail furnace wall and the supporting beam. The channel steel is arranged at the end part of the wear-resistant and fire-resistant plastic refractory, and the wear-resistant and fire-resistant plastic refractory is fixedly connected with the supporting beam through a bolt assembly, so that the channel steel in the wear-resistant and fire-resistant plastic refractory and the supporting beam form an integral structure. The utility model is applied to the field of boiler tail furnace walls.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of circulating fluidized bed boiler, concretely relates to a novel structure of circulating fluidized bed boiler tail part furnace wall support. BACKGROUND

[0002] Circulating fluidized bed boiler has the advantages of high combustion efficiency, large load regulation range, low pollutant emission, etc. During operation, the flue gas temperature in the tail part flue is relatively high, and there is a certain airflow impact and pressure fluctuation. This puts higher requirements on the stability and reliability of the tail part furnace wall. The traditional bracket technology structure can provide effective support for the tail part furnace wall, enhance the stability of the furnace wall, and reduce the risk of deformation and cracking. However, this structure has many disadvantages over time.

[0003] (I) Installation complexity:

[0004] The installation of the bracket structure usually requires high precision and professional technology, and the installation process is relatively complex, which may increase the construction time and cost;

[0005] The technical level of the installation personnel is relatively high, and if the installation is improper, it may affect the performance of the bracket and the stability of the furnace wall.

[0006] (II) Potential thermal expansion problems:

[0007] Due to the high temperature generated during the operation of the boiler, the furnace wall and the bracket will expand. If the design of the bracket structure does not fully consider the thermal expansion factor, it may cause the furnace wall to be subjected to uneven stress, resulting in cracks or deformation;

[0008] The difference in thermal expansion may cause the connection part between the bracket and the furnace wall to loosen, affecting the sealing performance.

[0009] (III) Difficulty in maintenance:

[0010] The bracket structure is usually located in the narrow space of the tail part of the boiler, and it is difficult to maintain and overhaul. Once a problem occurs, it needs to spend a lot of time and effort to troubleshoot and repair;

[0011] Since the bracket structure is closely connected with the furnace wall, partial disassembly of the furnace wall may be required during maintenance, which will increase the maintenance cost and the impact on the operation of the boiler.

[0012] (IV) Material limitations:

[0013] The bracket structure usually requires the use of high-temperature-resistant and corrosion-resistant materials, which have high cost and relatively narrow selection range;

[0014] Some materials may have performance degradation in long-term high-temperature environment, affecting the service life of the bracket and the stability of the furnace wall.

[0015] (V) Influence on the design of the furnace wall:

[0016] The presence of the bracket structure may limit the design flexibility of the furnace wall. In order to cooperate with the bracket structure, the design of the furnace wall may need to make some compromises, which may affect the performance of the furnace wall in terms of thermal insulation, sealing performance, etc.

[0017] The weight of the bracket structure may also put higher requirements on the carrying capacity of the furnace wall, increasing the difficulty of the furnace wall design. Content of the utility model

[0018] The utility model discloses a new type structure of circulating fluidized bed boiler tail furnace wall support to solve the existing bracket structure, and installation usually needs higher precision and professional technology, and the installation process is relatively complex, which may increase construction time and cost, therefore, a new type structure of circulating fluidized bed boiler tail furnace wall support is provided.

[0019] The technical scheme of the utility model is:

[0020] A new type structure of circulating fluidized bed boiler tail furnace wall support, which comprises a tail furnace wall and a support beam, the outer side of the tail furnace wall is provided with the support beam, and the support area of the tail furnace wall and the support beam are provided with wear-resistant and refractory plastic, the new type structure of circulating fluidized bed boiler tail furnace wall support further comprises Y-shaped nails, V-shaped nails and channel steel.

[0021] The rod surface of the Y-shaped nail is symmetrically connected with a group of V-shaped nails, so that the Y-shaped nail and the group of V-shaped nails are integrally connected, the channel steel is arranged at the end of the wear-resistant and refractory plastic, and the wear-resistant and refractory plastic is fixedly connected between the support beam through a bolt assembly, so that the channel steel in the wear-resistant and refractory plastic and the support beam form an overall structure.

[0022] The Y-shaped nail, the V-shaped nail and the channel steel are installed in the wear-resistant and refractory plastic, so that the Y-shaped nail, the V-shaped nail, the channel steel and the wear-resistant and refractory plastic form an overall support structure through the adhesion of the wear-resistant and refractory plastic, and the support structure is arranged on the tail furnace wall to support the tail furnace wall.

[0023] Further, the tail of the Y-shaped nail is in V-shaped structure, and the Y-shaped nail is arranged in the wear-resistant and refractory plastic, and the wear-resistant and refractory plastic is fixed through a group of Y-shaped nails.

[0024] A group of Y-shaped nails are arranged transversely in the wear-resistant and refractory plastic, and the V-shaped structure of the tail of the Y-shaped nail increases the stability of the Y-shaped nail and the wear-resistant and refractory plastic.

[0025] Further, the V-shaped grab nails are connected with the rod-shaped structures of the Y-shaped grab nails, so that a group of V-shaped grab nails and Y-shaped grab nails are fixedly connected as a whole, and the base area of the V-shaped grab nails and the wear-resistant and fire-resistant plastic material is increased.

[0026] Further, the V-shaped grab nails adopt a metal sheet structure with a thickness of 3 mm, and the bending part of the V-shaped grab nails is fixedly connected with the V-shaped grab nails.

[0027] Further, the channel steel is arranged transversely outside the tail furnace wall, so that the channel steel and the tail furnace wall are arranged in parallel.

[0028] Further, the channel steel is arranged transversely outside the tail furnace wall, so that the channel steel and the tail furnace wall are arranged in parallel.

[0029] Further, the channel steel is arranged transversely outside the tail furnace wall, so that the channel steel and the tail furnace wall are arranged in parallel.

[0030] Further, the channel steel is arranged transversely outside the tail furnace wall, so that the channel steel and the tail furnace wall are arranged in parallel.

[0031] Further, the channel steel is arranged transversely outside the tail furnace wall, so that the channel steel and the tail furnace wall are arranged in parallel.

[0032] Further, the channel steel is arranged transversely outside the tail furnace wall, so that the channel steel and the tail furnace wall are arranged in parallel.

[0033] The bolt of the bolt assembly passes through the mounting holes of the support beam and the channel steel, and the bolt is fixed through the nut, so that the support beam and the channel steel are fixed as a whole, and the firmness of the support beam is increased.

[0034] Compared with the prior art, the utility model has the following effects:

[0035] The utility model optimizes the shortcomings of the traditional bracket structure during the tail furnace wall masonry of the circulating fluidized bed boiler, and changes the traditional bracket technology into a masonry load-bearing support beam form.

[0036] The Y-shaped grab nail and the V-shaped grab nail are welded, so that the grab nail can be fixed on the load-bearing beam stably, and stable support is provided for the furnace wall. During the operation of the boiler, the influence of factors such as pressure fluctuation, airflow impact and thermal expansion in the furnace can be effectively resisted, and the stability of the furnace wall is ensured. The utility model has high strength and rigidity, can bear the weight of the furnace wall and various external forces during operation, and ensures that the furnace wall will not deform or collapse.

[0037] The combination of the welding nails and the bearing beam makes the parts of the furnace wall tightly connected to form a whole body, which helps to improve the anti-seismic performance and impact resistance of the furnace wall and reduce the risk of overall failure caused by local damage.

[0038] The construction is convenient and fast, the installation of the welding nails is relatively simple, and the welding nails can be prefabricated in a factory and then welded at a construction site, so that the construction efficiency is greatly improved.The nail structure can effectively resist thermal expansion and deformation caused by high temperature, and ensure the structural integrity and performance stability of the furnace wall. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a structural schematic view of the utility model;

[0040] Figure 2 is a connection schematic view of the Y-shaped nails and the V-shaped nails in Figure 1

[0041] Figure 3 is an installation schematic view of the tail furnace wall; Figure 1

[0042] Figure 4 is a local enlarged view of the A part in Figure 3

[0043] Figure 5 is a support structure schematic view of the original tail furnace wall;

[0044] In the figure: 1, tail furnace wall, 2, support beam, 3, wear-resistant and refractory plastic, 4, Y-shaped nail, 5, V-shaped nail, 6, channel steel, 7, bolt assembly, 8, mounting hole, 9, upper tail part guard plate, 10, lower tail part guard plate, 11, bracket, 71, bolt, 72, nut, 73, gasket. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, and the following embodiments are used to illustrate the utility model but not to limit the scope of the utility model.

[0046] Specific embodiment one: in combination with Figure 1 ​​The embodiment is explained, and the new structure of the tail furnace wall support of the circulating fluidized bed boiler of the embodiment comprises a tail furnace wall 1 and a support beam 2, the outer side of the tail furnace wall 1 is provided with the support beam 2, and the wear-resistant refractory plastic 3 is arranged between the support area of the tail furnace wall 1 and the support beam 2, the new structure of the tail furnace wall support of the circulating fluidized bed boiler further comprises Y-shaped nails 4, V-shaped nails 5 and channel steel 6;

[0047] The symmetrically connected rod surface of the Y-shaped nail 4 is connected with a group of V-shaped nails 5, so that the Y-shaped nail 4 and the group of V-shaped nails 5 are integrally connected, the channel steel 6 is arranged at the end of the wear-resistant refractory plastic 3, and the wear-resistant refractory plastic 3 is fixedly connected between the support beam 2 through a bolt assembly 7, so that the channel steel 6 in the wear-resistant refractory plastic 3 and the support beam 2 form an integral structure;

[0048] The Y-shaped nail 4, the V-shaped nail 5 and the channel steel 6 are arranged in the wear-resistant refractory plastic 3, so that the Y-shaped nail 4, the V-shaped nail 5, the channel steel 6 and the wear-resistant refractory plastic 3 form an integral support structure through the adhesion of the wear-resistant refractory plastic 3, and the support structure is arranged on the tail furnace wall 1 to support the tail furnace wall 1.

[0049] The wear-resistant refractory plastic 9 can prevent the erosion of the return stroke of the flue gas carried in the operation process to the support beam, prolong the service life of the beam, the unique high-temperature resistance feature can make the support beam 2 maintain good performance in a high-temperature environment, the good adhesion of the wear-resistant refractory plastic 3 can firmly combine the Y-shaped nail 4, the V-shaped nail 5 and the channel steel 6, and the stability of the integral structure of the support beam 2 is enhanced, and meanwhile, the good plasticity of the wear-resistant refractory plastic 3 makes it easier to process and form, so that the construction is more convenient.

[0050] Specific implementation method two: combined Figure 2 The embodiment is explained, and the new structure of the tail furnace wall support of the circulating fluidized bed boiler of the embodiment comprises a tail furnace wall 1 and a support beam 2, the outer side of the tail furnace wall 1 is provided with the support beam 2, and the wear-resistant refractory plastic 3 is arranged between the support area of the tail furnace wall 1 and the support beam 2, the new structure of the tail furnace wall support of the circulating fluidized bed boiler further comprises Y-shaped nails 4, V-shaped nails 5 and channel steel 6;

[0051] A group of Y-shaped nails 4 are arranged transversely in the wear-resistant refractory plastic 3, and the V-shaped structure of the tail of the Y-shaped nail 4 increases the stability of the Y-shaped nail 4 and the wear-resistant refractory plastic 3.

[0052] The Y-shaped nail 4 can fix the wear-resistant refractory plastic 3, and ensure the stability and durability of the beam. The Y-shaped nail 4 can also play a structure of preventing rotation, and it is difficult to rotate out of the material once it is put into the material, thereby improving the stability of the beam.

[0053] Specific implementation method three: combined Figure 2The embodiment is described, and the new structure of the tail wall support of the circulating fluidized bed boiler of the embodiment is a new structure of the tail wall support of the circulating fluidized bed boiler, wherein the V-shaped nails 5 are connected with the rod-shaped structures of the Y-shaped nails 4, so that a group of V-shaped nails 5 and Y-shaped nails 4 are fixedly connected as a whole, and the base area of the V-shaped nails 5 and the wear-resistant and refractory plastic 3 is increased.

[0054] Specific implementation four: combination Figure 2 The embodiment is described, and the new structure of the tail wall support of the circulating fluidized bed boiler of the embodiment is a new structure of the tail wall support of the circulating fluidized bed boiler, wherein the V-shaped nails 5 are connected with the rod-shaped structures of the Y-shaped nails 4, so that a group of V-shaped nails 5 and Y-shaped nails 4 are fixedly connected as a whole, and the base area of the V-shaped nails 5 and the wear-resistant and refractory plastic 3 is increased.

[0055] The V-shaped nails 5 are welded on the Y-shaped nails 4, which is simple to install and can effectively connect and fix the refractory material. The Y-shaped nails 5 are made of 3mm metal sheets, which can better integrate with the plastic and make the beam more firm.

[0056] Specific implementation five: combination Figure 3 The embodiment is described, and the new structure of the tail wall support of the circulating fluidized bed boiler of the embodiment is a new structure of the tail wall support of the circulating fluidized bed boiler, wherein the channel steel 6 is arranged transversely on the outer side of the tail wall 1, so that the channel steel 6 and the tail wall 1 are arranged in parallel.

[0057] The combination of the welded nails and the support beam 2 makes the parts of the wall tightly connected and forms a whole. This integrity helps to improve the anti-seismic performance and impact resistance of the tail wall 1, reduces the risk of overall failure caused by local damage, and better ensures the sealing of the tail wall 1 to prevent smoke leakage. The structure of the welded nails and the support beam 2 can make the brick joints of the wall more tightly, reduce the possibility of air leakage, and improve the thermal efficiency of the boiler.

[0058] Specific implementation six: combination Figure 1 and Figure 2 The embodiment is described, and the new structure of the tail wall support of the circulating fluidized bed boiler of the embodiment is a new structure of the tail wall support of the circulating fluidized bed boiler, wherein the channel steel 6 is arranged transversely on the outer side of the tail wall 1, so that the channel steel 6 and the tail wall 1 are arranged in parallel.

[0059] Specific implementation seven: combination Figure 4 The embodiment is described, and the new structure of the tail wall support of the circulating fluidized bed boiler of the embodiment is a new structure of the tail wall support of the circulating fluidized bed boiler, wherein the channel steel 6 is arranged transversely on the outer side of the tail wall 1, so that the channel steel 6 and the tail wall 1 are arranged in parallel.

[0060] Specific implementation eight: combination Figure 4The embodiment is explained as follows: a new structure of a circulating fluidized bed boiler tail furnace wall support, the support beam 2 is an I-beam structure, and the upper tail guard plate 9 and the lower tail guard plate 10 are respectively arranged on the support beam 2.

[0061] Specific embodiment nine: in combination Figure 4 The embodiment is explained as follows: a new structure of a circulating fluidized bed boiler tail furnace wall support, the bolt assembly 7 in the mounting hole 8 on the channel steel 6 can be used for connecting and fixing the connecting part of the upper tail guard plate 9 and the lower tail guard plate 10.

[0062] Specific embodiment ten: in combination Figure 1 Figure 5 The embodiment is explained as follows: a new structure of a circulating fluidized bed boiler tail furnace wall support, the bolt assembly 7 includes a bolt 71, a nut 72 and a gasket 73.

[0063] The bolt 71 of the bolt assembly 7 passes through the mounting hole 8 on the support beam 2 and the channel steel 6, and the bolt 71 is fixed by the nut 72, so that the support beam 2 and the channel steel 6 are fixed as a whole, and the firmness of the support beam 2 is increased.

[0064] The bolt 71, the nut 72 and the gasket 73 connect the channel steel 6, the upper tail guard plate 9 and the lower tail guard plate 10, so that the upper tail guard plate 9 and the lower tail guard plate 10 are convenient to maintain and replace. The Y-shaped grab nail 4 and the V-shaped grab nail 5 welded together can effectively resist the influence of pressure fluctuation, air flow impact and thermal expansion in the furnace and other factors, and ensure the stability of the furnace wall. The bearing beam has high strength and rigidity as a main bearing structure, can bear the weight of the furnace wall and various external forces in the running process, and ensures that the furnace wall will not deform or collapse.

[0065] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution range of the present application, and make equivalent embodiments with equivalent changes. Any simple modification, equivalent replacement and improvement of the above embodiments made according to the technical essence of the present application within the spirit and principles of the present application are still within the protection range of the technical solution of the present application.​

Claims

1. A new structure of a circulating fluidized bed boiler back pass wall support, consisting of a back pass wall (1) and a support beam (2), the outer side of the back pass wall (1) is provided with a support beam (2), and between the support area of the back pass wall (1) and the support beam (2) there is a wear-resistant refractory plastic (3), characterized in that, The new structure of the circulating fluidized bed boiler tail furnace wall support further comprises Y-shaped nails (4), V-shaped nails (5) and channel steel (6); The symmetrically connected rod surfaces of the Y-shaped nails (4) are connected with a group of V-shaped nails (5), so that the Y-shaped nails (4) and the group of V-shaped nails (5) are integrally connected, the channel steel (6) is arranged at the end of the wear-resistant and refractory plastic (3), and the wear-resistant and refractory plastic (3) is fixedly connected between the support beam (2) through the bolt assembly (7), so that the channel steel (6) in the wear-resistant and refractory plastic (3) and the support beam (2) form an integral structure. The Y-shaped nails (4), V-shaped nails (5) and channel steel (6) are installed in the wear-resistant and refractory plastic (3), so that the Y-shaped nails (4), V-shaped nails (5), channel steel (6) and wear-resistant and refractory plastic (3) form an integral support structure through the adhesion of the wear-resistant and refractory plastic (3), and the support structure is arranged on the tail furnace wall (1) to support the tail furnace wall (1).

2. A new type of structure for the support of the back wall of a CFB boiler according to claim 1, characterized in that, The tail part of the Y-shaped nail (4) is in a V-shaped structure, and the Y-shaped nail (4) is arranged in the wear-resistant and refractory plastic (3), and the wear-resistant and refractory plastic (3) is fixed by the group of Y-shaped nails (4); A group of Y-shaped nails (4) are arranged transversely in the wear-resistant and refractory plastic (3), and the V-shaped structure of the tail part of the Y-shaped nail (4) increases the stability of the Y-shaped nail (4) and the wear-resistant and refractory plastic (3).

3. A new type of structure for the support of the back wall of a CFB boiler according to claim 2, characterized in that, The V-shaped nail (5) is connected with the rod-shaped structure of the Y-shaped nail (4), so that a group of V-shaped nails (5) and Y-shaped nails (4) are fixedly connected as a whole, and the basic area of the V-shaped nail (5) and the wear-resistant and refractory plastic (3) is increased.

4. A new type of structure for the support of the back wall of a CFB boiler according to claim 3, characterized in that, The V-shaped nail (5) adopts a metal sheet structure with a thickness of 3mm, and the bent part of the V-shaped nail (5) is fixedly connected with the V-shaped nail (5).

5. A new type of structure for the support of the back wall of a circulating fluidized bed boiler according to claim 1, characterized in that, The channel steel (6) is arranged transversely on the outer side of the tail furnace wall (1), so that the channel steel (6) and the tail furnace wall (1) are arranged in a parallel structure.

6. A new type of construction of a back wall support of a circulating fluidized bed boiler according to claim 5, characterized in that, The channel steel (6) is arranged in a flange structure along the horizontal direction of the support beam (2) in the middle of the support beam (2), so as to provide rigid support for the support beam (2).

7. The new structure of the circulating fluidized bed boiler tail furnace wall support according to claim 6, wherein The channel steel (6) is provided with a mounting hole (8), and a bolt assembly (7) is inserted into the mounting hole (8), so as to fixedly connect the channel steel (6) and the support beam (2) through the bolt assembly (7).

8. A new type of construction of a back wall support of a circulating fluidized bed boiler according to claim 7, characterized in that, The support beam (2) is in an I-shaped steel structure, and an upper tail part guard plate (9) and a lower tail part guard plate (10) are respectively arranged on the support beam (2).

9. A novel construction of a back wall support for a circulating fluidized bed boiler according to claim 8, characterized in that, The bolt assembly (7) in the mounting hole (8) of the channel steel (6) can be used for connecting and fixing the connection part of the upper tail part guard plate (9) and the lower tail part guard plate (10).

10. A novel construction of a back wall support of a circulating fluidized bed boiler according to claim 9, characterized in that, The bolt assembly (7) comprises a bolt (71), a nut (72) and a gasket (73). The bolt (71) of the bolt assembly (7) passes through the mounting hole (8) on the support beam (2) and the channel steel (6), and the bolt (71) is fixed through the nut (72), so that the support beam (2) and the channel steel (6) are fixed as a whole, and the firmness of the support beam (2) is increased.

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