Superheater structure for boiler

Abstract

The utility model discloses a superheater structure for boiler, concretely relates to steam boiler technical field, including multiple superheated pipes, each group superheated pipe all is equipped with a plurality, the middle part of superheated pipe is equipped with vertical connection middle pipe, the lower extreme of connection middle pipe is equipped with backflushing pipe, the outside of superheated pipe end face is equipped with spacing board, one side of spacing board is equipped with locking cover, one side end face of superheated pipe is equipped with a plurality of concave limit slot. The utility model discloses practical use, through the corresponding setting state of spacing board, locking cover, locking bolt and concave limit slot, can conveniently clamps superheated pipe in the inside of concave limit slot, and locking is fixed to spacing board and locking cover through locking bolt, thereby makes multiple superheated pipes distribution more even, thereby makes superheated pipe installation work more stable.

Description

Technical Field

[0001] This utility model relates to the field of steam boiler technology, and more specifically, to the structure of a superheater for a boiler. Background Technology

[0002] The superheater is a component in a boiler that further heats steam from its saturation temperature to its superheat temperature. The superheater tubes are the heating surfaces of the boiler. The boiler superheater is a relatively important auxiliary heat collection device in the steam system of a large boiler. The boiler superheater recovers the energy of the boiler flue gas, so that the steam coming out of the boiler can be heated and turned into dry steam, which helps to improve the boiler's thermal efficiency. The boiler tubes are in the harshest working environment. Due to long-term exposure to high temperature, high pressure and high-speed fine ash particles, tube rupture often occurs.

[0003] For example, patent CN106247316B discloses a boiler superheater, including a spiral tube with a double spiral structure, consisting of spiral I and spiral II from the inside out. Spiral I is a symmetrical U-shaped horizontal spiral starting from one end. Spiral II surrounds spiral I with spiral I as a reference. There is a distance difference between spiral I and spiral II. A set of backwash pipes is symmetrically provided at the beginning, end, and corner between the beginning and end of spiral II. An expansion gap is provided on spiral II between every two sets of backwash pipes. Several sets of backwash pipes are staggered. A backwash connector is provided at the end of the spiral tube. The backwash connector is a hollow sphere with a diameter larger than that of the spiral tube. Sodium hydroxide or ammonia is added to the backwash water source to adjust the pH value of the water source to make it alkaline. The alkaline water source is then heated and deoxygenated. Finally, the backwash connector of the spiral tube is connected to the water source.

[0004] The above-mentioned device adopts a double helix structure when in use. By arranging several sets of backwash pipes in an alternating manner on the spiral II, the spiral tube can be repeatedly circulated and flushed. However, the flushing fluid of multiple backwash pipes will affect each other, which will affect the flow rate of the flushing fluid inside the superheated tube, thus easily affecting the efficiency and effect of superheated tube flushing. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a superheater structure for boilers. The technical problem to be solved by this utility model is: how to improve the efficiency and effect of superheater pipe flushing.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a superheater structure for a boiler, comprising multiple sets of superheater tubes, each set of superheater tubes having multiple components, a vertical connecting tube in the middle of each superheater tube, a backflushing tube at the lower end of the connecting tube, a limiting partition plate on the outside of the end face of each superheater tube, a locking cover plate on one side of the limiting partition plate, and multiple concave limiting grooves on one side end face of each superheater tube.

[0007] The outer end face of the limiting partition plate is provided with multiple locking bolts, and one end of the superheated pipe is provided with a first bend at the connection between the collection tank and the diversion tank, and one end of the adjacent superheated pipe is provided with a second bend at the connection between the collection tank and the diversion tank.

[0008] In a preferred embodiment, one end of the superheated tube is provided with a collection tank, and the connection between the superheated tube and the collection tank is made by welding.

[0009] In a preferred embodiment, the superheater tube has a diversion tank at the end away from the collection tank, and the connection between the superheater tube and the diversion tank is achieved by welding.

[0010] In a preferred embodiment, the upper end of the diversion tank is provided with a plurality of guide pipes, and the upper end of the guide pipes is provided with a dispersion pipe.

[0011] In a preferred embodiment, the upper end of the collection tank is provided with a plurality of manifolds, and the upper end of the manifolds is provided with a collection pipe.

[0012] In a preferred embodiment, one end of the dispersing pipe and the collecting pipe is provided with an external connecting pipe.

[0013] In a preferred embodiment, the vertical connecting tube connects multiple superheated tubes together, and the upper end of the backflushing tube is connected to the connecting tube by welding.

[0014] In a preferred embodiment, the inner end face of the concave limiting groove is in contact with the outer end face of the superheated tube, and the first bending portion and the second bending portion are arranged in a mirror image on both sides of the vertical central axis in the right-view direction.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] In actual use, by setting the limiting partition plate, locking cover plate, locking bolt and concave limiting groove in the corresponding state, the superheating tube can be easily clamped in the concave limiting groove, and the limiting partition plate and locking cover plate can be locked and fixed by locking bolt, so that the multiple superheating tubes are more evenly distributed, and the superheating tube installation is more stable.

[0017] In the corresponding configuration of the connecting tube and the backflushing tube, multiple superheating tubes can be connected in series through the connecting tube, and flushing fluid can be introduced into the connecting tube through the backflushing tube, which facilitates flushing of the inside of the superheating tube, keeps the inside of the superheating tube clean, and prevents impurities and dust from remaining inside the superheating tube due to superheated steam. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This utility model Figure 1 Enlarged view of section A.

[0020] Figure 3 This utility model Figure 1 Enlarged view of section B in the middle.

[0021] Figure 4 This is a schematic diagram of the overall right-side structure of this utility model.

[0022] The attached diagram is labeled as follows: 1 superheated pipe, 2 limiting partition plate, 3 diversion tank, 4 collection tank, 5 guide pipe, 6 dispersion pipe, 7 collection pipe, 8 external connecting pipe, 9 connecting middle pipe, 10 backflushing pipe, 11 manifold, 12 locking bolt, 13 first bend, 14 second bend, 15 concave limiting groove, 16 locking cover plate. Detailed Implementation

[0023] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0024] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more exemplary embodiments. Numerous specific details are provided in the following description to give a full understanding of exemplary embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more of the specific details omitted, or other methods, components, steps, etc., can be employed. In other instances, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0025] This utility model provides a superheater structure for boilers, such as... Figure 1 , 2As shown in Figures 3 and 4, the system includes multiple sets of superheater tubes 1. Each set of superheater tubes 1 has multiple tubes. A vertical connecting tube 9 is provided in the middle of the superheater tube 1. Multiple superheater tubes 1 are connected in series through the vertical connecting tube 9, so that multiple superheater tubes 1 can be connected.

[0026] The lower end of the connecting tube 9 is provided with a backwash pipe 10, which is connected to an external flushing device. The backwash pipe 10 can introduce flushing fluid into the interior of the connecting tube 1 through the external flushing device, thereby facilitating the flushing of impurities deposited inside the superheated tube 1. The outer side of the end face of the superheated tube 1 is provided with a limiting partition plate 2, and a locking cover plate 16 is provided on one side of the limiting partition plate 2. A plurality of concave limiting grooves 15 are opened on one side end face of the superheated tube 1, which can install the superheated tube 1 inside the concave limiting grooves 15.

[0027] The outer end face of the limiting partition plate 2 is provided with multiple locking bolts 12. The limiting partition plate 2 separates multiple superheated pipes 1. Then, the locking cover plate 16 and the concave limiting groove 15 can be locked and fixed by the multiple locking bolts 12. One end of the superheated pipe 1 is provided with a first bend 13 at the connection between it and the collection tank 4 and the diversion tank 3. The connection between one end of the adjacent superheated pipe 1 and the collection tank 4 and the diversion tank 3 is provided with a second bend 14. The first bend 13 and the second bend 14 make the welding operation between the superheated pipe 1 and the diversion tank 3 and the collection tank 4 more convenient.

[0028] One end of the superheater tube 1 is provided with a collection tank 4, and the connection between the superheater tube 1 and the collection tank 4 is made by welding. The end of the superheater tube 1 away from the collection tank 4 is provided with a diversion tank 3, and the connection between the superheater tube 1 and the diversion tank 3 is made by welding.

[0029] The upper end of the diversion tank 3 is provided with multiple guide pipes 5, the upper end of the guide pipes 5 is provided with a dispersing pipe 6, the upper end of the collection tank 4 is provided with multiple converging pipes 11, and the upper end of the converging pipes 11 is provided with a collecting pipe 7.

[0030] One end of the dispersion pipe 6 and the collection pipe 7 is provided with an external connecting pipe 8. When the external connecting pipe 8 introduces steam into the interior of the dispersion pipe 6, it can uniformly introduce steam into the interior of the distribution tank 3 through the dispersion pipe 6 and the guide pipe 5. The vertical connecting pipe 9 connects multiple superheated pipes 1 together. The upper end of the backwash pipe 10 is connected to the connecting pipe 9 by welding.

[0031] The inner end face of the concave limiting groove 15 is in contact with the outer end face of the superheated tube 1. The first bending part 13 and the second bending part 14 are set in a mirror state on both sides of the vertical central axis in the right view direction. The multiple concave limiting grooves 15 can separate the multiple superheated tubes 1, making the multiple superheated tubes 1 more stable. The steam inside the diversion tank 3 can be evenly introduced into the interior of the superheated tube 1 through the multiple first bending parts 13 and the multiple second bending parts 14.

[0032] The high temperature in the boiler heats the steam in the superheater tube 1, turning the steam inside the superheater tube 1 into superheated steam. The superheated steam then flows through the superheater tube 1 to the collection tank 4 and flows out to the outside through the manifold 11 and the collection pipe 7.

[0033] Finally, it should be noted that: the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A superheater structure for a boiler, comprising multiple sets of superheater tubes (1), characterized in that: Each group of superheated tubes (1) is provided with multiple tubes. The middle part of the superheated tube (1) is provided with a vertical connecting tube (9). The lower end of the connecting tube (9) is provided with a backflushing tube (10). The outer side of the end face of the superheated tube (1) is provided with a limiting partition plate (2). One side of the limiting partition plate (2) is provided with a locking cover plate (16). One side end face of the superheated tube (1) is provided with multiple concave limiting grooves (15). The outer end face of the limiting partition plate (2) is provided with multiple locking bolts (12), and a first bend (13) is provided at the connection between one end of the superheated pipe (1) and the collection tank (4) and the diversion tank (3), and a second bend (14) is provided at the connection between one end of the adjacent superheated pipe (1) and the collection tank (4) and the diversion tank (3).

2. The superheater structure for a boiler according to claim 1, characterized by: One end of the superheated pipe (1) is provided with a collection tank (4), and the connection between the superheated pipe (1) and the collection tank (4) is connected by welding.

3. The superheater structure for a boiler according to claim 1, characterized by: The superheated pipe (1) has a diversion tank (3) at one end away from the collection tank (4), and the connection between the superheated pipe (1) and the diversion tank (3) is connected by welding.

4. The superheater structure for a boiler according to claim 1, characterized by: The upper end of the diversion tank (3) is provided with multiple guide pipes (5), and the upper end of the guide pipes (5) is provided with a dispersion pipe (6).

5. The superheater structure for a boiler according to claim 4, characterized by: The upper end of the collection tank (4) is provided with multiple manifolds (11), and the upper end of the manifolds (11) is provided with a collection pipe (7).

6. The superheater structure for a boiler according to claim 5, characterized by: An external connecting pipe (8) is provided at one end of the dispersing pipe (6) and the collecting pipe (7).

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