Supporting device of coiled pipe superheater

Abstract

The utility model discloses a supporting device of a coiled pipe superheater. Comprising a superheater tube bundle arranged in a vertical flue, a superheater inlet header and a superheater outlet header, the superheater inlet header and the superheater outlet header are connected with the superheater tube bundle, the superheater tube bundle is formed by horizontally arranging a plurality of coiled tubes, hooks with downward openings are arranged at the two ends of each coiled tube, and a supporting plate is arranged on the side wall of the vertical flue. The hooks at the two ends of the coiled pipe are hung on the supporting plate, a plurality of V-shaped notches with upward openings are formed in the positions, corresponding to the hooks at the two ends of the coiled pipe, of the supporting plate, and the hooks are hung in the V-shaped notches. According to the technical scheme, a traditional overheater suspension pipe is omitted, cost is saved, and meanwhile fault points of the overheater are reduced; the coiled pipe of the superheater is not suspended by a traditional pipe hanging structure and is fixed in a two-end supporting mode, shaking of the pipe of the superheater can be effectively relieved, the stability of the superheater is improved, and vibration of a boiler is reduced; the whole supporting device is simple in structure, high in reliability and small in maintenance workload.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of boiler superheater, specifically to a kind of support structure of the pipeline of boiler superheater. BACKGROUND

[0002] Boiler is a complex structure, multiple systems combined equipment complex. As the device of producing electric energy, it should meet the requirements of safe and reliable, economic and energy saving and environment friendly. And in the convective superheater in the rear flue gas passage of boiler, it is a very important boiler component to improve steam temperature.

[0003] Superheater is usually installed in the rear flue gas passage of boiler, its role is to heat saturated steam to superheated steam with certain temperature. This process not only improves the thermal efficiency of power plant, but also reduces the steam humidity of last few stages of steam turbine, thereby preventing blade corrosion. In addition, superheater can also reduce the flue gas temperature, recover the heat in flue gas, further improve the thermal efficiency. These effects of superheater make it become an essential heat exchange component of modern boiler.

[0004] Superheater can be divided into convective, radiant and semi-radiant according to heat transfer mode, and can be divided into serpentine tube type, screen type, wall type and wall type according to structural characteristics. Serpentine tube type high temperature superheater is one of superheaters, which is generally composed of superheater inlet header, superheater outlet header and serpentine tube. The current boiler generally arranges the serpentine tube part of superheater in the tail flue of boiler, and arranges the superheater inlet header and the superheater outlet header outside the burnout chamber or the tail flue. Steam flows in the serpentine tube in the superheater, and flue gas washes the tube wall outside the tube to realize heat exchange between flue gas and feed water.

[0005] The serpentine tube part is the heaviest part in the superheater, so the fixing device of superheater is usually fixed for the serpentine tube. The traditional fixing mode is to weld support frame between the flue side wall of boiler (membrane water cooling wall or steel plate welding) and serpentine tube, but due to long-term heating of superheater, the weld between support frame, serpentine tube and water cooling wall tube is easy to crack under the effect of thermal expansion and contraction, and the tearing of weld is also easy to cause the cracking of serpentine tube and water cooling wall tube. The serpentine tube is also easy to drop after lacking support. Another support mode is that the superheater serpentine tube is suspended and fixed by vertically arranged suspended tube. At this time, when flue gas washes the tube wall, the suspended superheater tube may horizontally shake under the action of washing resistance, which affects the stability of superheater and easily causes the vibration of boiler, which has certain influence on the safe operation of boiler. SUMMARY

[0006] The utility model aims at overcoming the defects of prior art, and provides a kind of support device of serpentine tube superheater to solve the problems in the background art.

[0007] The technical scheme adopted by the utility model for realizing the above-mentioned purpose is:

[0008] A support device of a serpentine tube superheater, comprising a superheater tube bundle arranged in a vertical flue, a superheater inlet header and a superheater outlet header connected with the superheater tube bundle, and the superheater tube bundle is horizontally arranged by a plurality of serpentine tubes, characterized in that: the two ends of the serpentine tube are hung on the side wall of the vertical flue.

[0009] In the support device of the serpentine tube superheater, the two ends of the serpentine tube are provided with hooks with downward openings, and the side wall of the vertical flue is provided with a support plate, and the hooks at the two ends of the serpentine tube are hung on the support plate.

[0010] By adopting the above technical scheme, the serpentine tube of the superheater is not suspended by using the traditional pipe suspension structure, but is fixed in the form of two-end support, which can effectively reduce the shaking of the superheater tube, increase the stability of the superheater, and reduce the vibration of the boiler.

[0011] Further, a plurality of V-shaped notches with upward openings are arranged on the support plate at positions corresponding to the hooks at the two ends of the serpentine tube, the opening angle of the V-shaped notches is 30°-90°, and the hooks are hung in the V-shaped notches.

[0012] By adopting the above technical scheme, the hooks of the superheater are hung in the V-shaped notches of the support plate by gravity and finally settled at the lowest part of the V-shaped notches. The advantages of the V-shaped notches are as follows: firstly, the opening part of the V-shaped opening is large, so that the hooks of the superheater are more easily hung in; secondly, after the hooks of the superheater are hung in the V-shaped notches, even if the serpentine tube is irregular and not hung at the center of the V-shaped notches, they can be stably clamped in the V-shaped opening at last, and the realization process is as follows: the superheater serpentine tube will sag due to gravity and vibrate when there is flue gas flow, with the vibration of the superheater serpentine tube, the superheater hooks will slide along the two sides of the V-shaped notches to the bottom of the V-shaped notches, until finally sliding to the bottom of the V-shaped notches, at this time, the superheater hooks will be clamped at the bottom of the V-shaped notches and no longer shake, thereby achieving the purpose of preventing the vibration of the superheater serpentine tube.

[0013] Further, the plurality of V-shaped notches are arranged at equal intervals along the length direction of the support plate.

[0014] By adopting the above technical scheme, the serpentine tubes can be arranged in the flue.

[0015] In the support device of the serpentine tube superheater, the bottom of the V-shaped notch is provided with a circular chamfer.

[0016] By adopting the above technical scheme, the circular chamfer arranged at the bottom of the V-shaped notch of the superheater support plate can prevent stress concentration.

[0017] In the support device for the serpentine tube superheater, the vertical flue is surrounded by membrane walls, and a support plate fixing member is welded on the flat steel of the membrane wall, and the support plate is connected to the support plate fixing member.

[0018] In the support device for the serpentine tube superheater, the vertical flue is surrounded by membrane walls, and a support plate fixing member is welded on the flat steel of the membrane wall, and the support plate is connected to the support plate fixing member.

[0019] In the support device for the serpentine tube superheater, the vertical flue is surrounded by membrane walls, and a support plate fixing member is welded on the flat steel of the membrane wall, and the support plate is connected to the support plate fixing member. Beneficial effects

[0020] 1. The traditional superheater suspension tube is removed, thereby saving cost and reducing the failure points of the superheater.

[0021] 2. The serpentine tube of the superheater is not suspended by using the traditional suspension tube structure, but is fixed by using the form of two-end support, thereby effectively reducing the shaking of the superheater tube, increasing the stability of the superheater, and reducing the vibration of the boiler.

[0022] 3. The V-shaped notch is arranged, so that the superheater tube hook is more conveniently hung on the support plate.

[0023] 4. The whole support device has simple structure, high reliability, and small maintenance workload. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic view of embodiment one of the utility model.

[0025] Figure 2 is a front view schematic view of the hook in the utility model.

[0026] Figure 3 is a side view schematic view of the hook in the utility model.

[0027] Figure 4 is a front view schematic view of the support plate in embodiment one, embodiment two and embodiment three of the utility model.

[0028] Figure 5 is Figure 4 A-A sectional view in the schematic view.

[0029] Figure 6 is Figure 4 B-B sectional view in the schematic view.

[0030] Figure 7 is a front view schematic view of the support plate fixing member in embodiment one, embodiment two and embodiment three of the utility model.

[0031] Figure 8 is the side view schematic diagram of the support plate fixing member in the embodiment one, the embodiment two and the embodiment three of the utility model.

[0032] Figure 9 is the schematic diagram of the embodiment two of the utility model.

[0033] Figure 10 is the schematic diagram of the embodiment three of the utility model.

[0034] Figure 11 is the schematic diagram of the embodiment four of the utility model.

[0035] Figure 12 is the front view schematic diagram of the support plate in the embodiment four of the utility model.

[0036] Figure 13 is the side view schematic diagram of the support plate in the embodiment four of the utility model.

[0037] In the drawing: 1 serpentine pipe, 2-1, 2-2 flue side wall, 3 hook, 4 support plate, 4-1 V-shaped notch, 4-2 through hole, 5 support plate fixing member. DETAILED DESCRIPTION

[0038] The utility model will be further explained by non-restrictive examples and in conjunction with the drawings. Embodiment one:

[0039] See Figures 1 to 8 A support device of serpentine pipe superheater, including the superheater tube bundle arranged in the vertical flue and the superheater inlet header and the superheater outlet header connected with the superheater tube bundle, the superheater tube bundle is formed by the horizontal arrangement of multiple serpentine pipes 1, the superheater inlet header, the superheater outlet header and the superheater intermediate header are all arranged in the upper portion of the superheater and are located at the outside of the hearth (not shown in the drawing). The two ends of the serpentine pipe 1 are hung on the vertical flue side wall 2-1 and the flue side wall 2-2 respectively.

[0040] Specifically, the hook 3 with the opening facing down is welded at the bend of the two ends of the serpentine pipe 1, the support plate 4 is arranged on the vertical flue side wall, and the hook 3 at the two ends of the serpentine pipe 1 is hung on the support plate 4.

[0041] In the embodiment, the vertical flue is enclosed by the membrane water cooling wall, the membrane water cooling wall is the airtight tube screen formed by connecting multiple vertical pipes side by side with flat steel, the support plate fixing member 5 is welded on the flat steel of the membrane wall, the support plate fixing member 5 is in the shape of ladder, the through hole 4-2 is arranged on the support plate 4, the large end on the support plate fixing member 5 is welded and fixed with the flat steel of the membrane wall, the small end 5-1 passes through the through hole 4-2, and then the support plate 4 is fixed on the support plate fixing member 5 by welding.

[0042] The support plate 4 is provided with a plurality of upwardly open V-shaped notches 4-1 corresponding to the hooks 3 at both ends of the serpentine tube 1, the opening angle of the V-shaped notches 4-1 is 30°-90°, and 60° is taken in the embodiment; the hooks 3 are hung in the V-shaped notches. The plurality of V-shaped notches are arranged at equal intervals along the length direction of the support plate 4. The bottom of the V-shaped notch 4-1 is provided with a circular chamfer.

[0043] The serpentine tube 1 can adopt a light tube or a finned tube, and the serpentine tube 1 adopts a finned tube in the embodiment. Embodiment two:

[0044] See Figures 2 to 9 A support device of a serpentine tube superheater, comprising a superheater tube bundle arranged in a vertical flue, a superheater inlet header and a superheater outlet header connected with the superheater tube bundle, the superheater tube bundle is arranged by a plurality of serpentine tubes 1 horizontally, the superheater inlet header, the superheater outlet header and a superheater intermediate header are arranged at the upper part of the superheater and located outside the furnace (not shown in the figure). The two ends of the serpentine tube 1 are hung on the vertical flue side wall 2-1 and the flue side wall 2-2 respectively.

[0045] Specifically, hooks 3 downwardly open are welded at the bends of the two ends of the serpentine tube 1, a support plate 4 is arranged on the vertical flue side wall, and the hooks 3 at the two ends of the serpentine tube 1 are hung on the support plate 4.

[0046] In the embodiment, the vertical flue is enclosed by welding steel plates, the support plate fixing member 5 is in a stepped shape, a through hole 4-2 is arranged on the support plate 4, the large end of the support plate fixing member 5 is welded and fixed with the flat steel of the membrane wall, the small end 5-1 passes through the through hole 4-2, and then the support plate 4 is fixed on the support plate fixing member 5 by welding.

[0047] The support plate 4 is provided with a plurality of upwardly open V-shaped notches 4-1 corresponding to the hooks 3 at both ends of the serpentine tube 1, the opening angle of the V-shaped notches 4-1 is 30°-90°, and 60° is taken in the embodiment; the hooks 3 are hung in the V-shaped notches. The plurality of V-shaped notches are arranged at equal intervals along the length direction of the support plate 4. The bottom of the V-shaped notch 4-1 is provided with a circular chamfer.

[0048] The serpentine tube 1 can adopt a light tube or a finned tube, and the serpentine tube 1 adopts a finned tube in the embodiment. Embodiment three:

[0049] See Figures 2 to 8 , Figure 10A support device for a serpentine tube superheater includes a superheater tube bundle disposed within a vertical flue, and a superheater inlet header and a superheater outlet header connected to the superheater tube bundle. The superheater tube bundle is composed of multiple serpentine tubes 1 arranged horizontally. The superheater inlet header, superheater outlet header, and superheater intermediate header are all disposed on the upper part of the superheater and located outside the furnace (not shown in the figure). The two ends of the serpentine tubes 1 are suspended from the vertical flue sidewalls 2-1 and 2-2, respectively.

[0050] Specifically, hooks 3 with downward openings are welded to the bends at both ends of the serpentine pipe 1, and a support plate 4 is provided on the vertical flue sidewall. The hooks 3 at both ends of the serpentine pipe 1 are attached to the support plate 4.

[0051] In this embodiment, the vertical flue is enclosed by refractory bricks. A support plate fixing component 5 is embedded in the refractory bricks. The support plate fixing component 5 is stepped. The support plate 4 is provided with through holes 4-2. The large end of the support plate fixing component 5 is welded and fixed to the flat steel of the membrane wall. The small end 5-1 passes through the through hole 4-2 and is then fixed to the support plate fixing component 5 by welding.

[0052] Multiple upward-facing V-shaped notches 4-1 are provided on the support plate 4 at positions corresponding to the hooks 3 at both ends of the serpentine tube 1. The opening angle of the V-shaped notches 4-1 is 30° to 90°, and 90° is used in this embodiment. The hooks 3 are attached to the V-shaped notches 4-1. The multiple V-shaped notches 4-1 are arranged at equal intervals along the length of the support plate 4. The bottom of the V-shaped notches 4-1 is provided with a rounded chamfer.

[0053] The serpentine tube 1 can be a bare tube or a finned tube. In this embodiment, the serpentine tube 1 is a finned tube. Example 4:

[0054] Please see Figures 2 to 3 , Figures 11 to 13 A support device for a serpentine tube superheater, wherein the vertical flue is enclosed by a membrane water-cooled wall, the membrane water-cooled wall is an airtight tube screen formed by connecting multiple vertical tubes side by side with flat steel, the support plate 4 is L-shaped, and the lower end is directly welded to the flat steel of the membrane wall, the rest of the structure is the same as in Embodiment 1.

[0055] The embodiments listed above are for understanding this utility model only and are not intended to limit the technical solutions described in this utility model. Those skilled in the art can make various changes or modifications based on the technical solutions described in the claims, and all equivalent changes or modifications should be covered within the scope of protection of the claims of this utility model.

Claims

1. A support device for a serpentine tube superheater, comprising a superheater tube bundle disposed within a vertical flue, and a superheater inlet header and a superheater outlet header connected to the superheater tube bundle, wherein the superheater tube bundle is composed of multiple serpentine tubes arranged horizontally, characterized in that: The two ends of the serpentine tube are suspended on the side wall of the vertical flue.

2. The support device for a serpentine tube superheater according to claim 1, characterized in that: The serpentine tube has hooks with downward openings at both ends, and a support plate is provided on the side wall of the vertical flue. The hooks at both ends of the serpentine tube are attached to the support plate.

3. The support device for a serpentine tube superheater according to claim 2, characterized in that: The support plate has multiple upward-facing V-shaped notches at positions corresponding to the hooks at both ends of the serpentine tube, with the opening angle of the V-shaped notches being 30° to 90°; the hooks are attached to the V-shaped notches.

4. The support device for a serpentine tube superheater according to claim 3, characterized in that: The multiple V-shaped notches are arranged at equal intervals along the length of the support plate.

5. The support device for a serpentine tube superheater according to claim 3, characterized in that: The bottom of the V-shaped notch is provided with a rounded chamfer.

6. A support device for a serpentine tube superheater according to claim 2, 3, 4, or 5, characterized in that: The vertical flue is enclosed by a membrane wall, and a support plate fixing component is welded to the flat steel of the membrane wall. The support plate is connected to the support plate fixing component.

7. A support device for a serpentine tube superheater according to claim 2, 3, 4, or 5, characterized in that: The vertical flue is formed by welding steel plates, and a support plate fixing component is welded onto the steel plate. The support plate is connected to the support plate fixing component.

8. A support device for a serpentine tube superheater according to claim 2, 3, 4, or 5, characterized in that: The vertical flue is enclosed by refractory bricks, and a support plate fixing component is embedded in the refractory bricks. The support plate is connected to the support plate fixing component.

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