Heat preservation box in waste heat boiler through-wall pipe furnace
By designing an internal insulation box for the waste heat boiler through-wall tubes, the problem of flue gas passage formation during frequent start-ups and shutdowns of the through-wall tubes was solved, achieving flue gas isolation and insulation effects, and meeting the expansion displacement requirements.
Patent Information
- Application Number
- CN202520475316.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-17
AI Technical Summary
In existing waste heat boilers, the through-wall pipes are prone to forming flue gas passages during frequent start-ups and shutdowns, and the compact internal structure increases the difficulty of insulation installation.
Design a furnace insulation box for through-wall tubes of a waste heat boiler, comprising a box body, a first insulation cotton, a sealing cover device and an anti-collision device. Through the combination of a support cylinder and a heat insulation pillow, the expansion displacement of the through-wall tube and the isolation of flue gas are realized, while providing a heat preservation effect.
It effectively prevents the leakage of flue gas and heat, meets the expansion displacement requirements of the through-wall pipe, ensures that the temperature of the furnace outer wall does not exceed the limit, and takes into account the insulation performance.
Smart Images
Figure CN223855046U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of gas turbine unit design, more particularly to a kind of waste heat boiler wall tube furnace inner insulation box. BACKGROUND
[0002] With the development of gas turbine unit, supporting waste heat boiler steam parameter is also higher and higher, and the thermal expansion of waste heat boiler also increases. At present, with the start and stop of gas turbine unit, wall tube moves frequently, which is easy to form flue gas passage, and the structure inside waste heat boiler is more compact, so the setting of inner insulation near wall tube is also increased. Therefore, a wall tube furnace inner insulation box is needed to solve the above problems. SUMMARY
[0003] The main purpose of the utility model is to provide a waste heat boiler wall tube furnace inner insulation box, which can meet the expansion displacement of wall tube, prevent internal flue gas leakage, and also consider heat preservation.
[0004] To achieve the above purpose, the technical scheme of the utility model is as follows:
[0005] A waste heat boiler wall tube furnace inner insulation box, comprising a box body through which the wall tube passes and a first insulation cotton arranged outside the box body, the box body comprises a first support cylinder fixed to the inner end face of the inner guard plate and a second support cylinder concentrically arranged with the first support cylinder, a sealing cover plate device is arranged between the first support cylinder and the second support cylinder, a first heat insulation pillow is sleeved on the outer cylindrical surface of the first support cylinder, and a second heat insulation pillow is arranged in the second support cylinder and slidably connected with the wall tube, the second heat insulation pillow and the sealing cover plate device can tightly abut against the left and right swinging of the wall tube, so that the first support cylinder and the second support cylinder always maintain a closed state.
[0006] According to the first aspect of the utility model, the sealing cover plate device comprises a second cover plate slidably connected with the wall tube and a first cover plate for connecting the first support cylinder and the second support cylinder, and a through hole is arranged in the middle of the first cover plate and the second cover plate for the wall tube to pass through.
[0007] According to the first aspect of the utility model, the first cover plate is located below the second cover plate, and the second cover plate can swing left and right with the wall tube.
[0008] According to the first aspect of the utility model, the outer diameter of the second cover plate is greater than the sum of the inner diameter of the first cover plate and the maximum displacement of the wall tube in the horizontal direction of heat state.
[0009] According to the first aspect of the utility model, the outer diameter of the second cover plate is less than the difference between the outer diameter of the first cover plate and the maximum displacement of the wall tube in the horizontal direction of heat state.
[0010] According to the first aspect of the utility model, the outer side of the box body is provided with an anti-collision device for protecting the through-wall pipe, the anti-collision device comprises an anti-collision pipe arranged perpendicularly to the inner guard plate and a second thermal insulation cotton sleeved on the anti-collision pipe.
[0011] According to the first aspect of the utility model, the upper side of the inner guard plate is provided in parallel with an inner guard plate and at least two bolt assemblies for connecting the inner guard plate, and the two bolt assemblies are arranged respectively on both sides of the through-wall pipe.
[0012] According to the first aspect of the utility model, the first support cylinder and the second support cylinder are respectively provided with a first cavity and a second cavity, the inner diameter of the first cavity is larger than the outer diameter of the through-wall pipe, and the inner diameter of the first cavity is smaller than the inner diameter of the second cavity.
[0013] According to the first aspect of the utility model, the inner diameter of the second cavity is larger than the outer diameter of the second heat insulation pillow.
[0014] According to the first aspect of the utility model, the surface of the second heat insulation pillow is sleeved with a dense steel wire mesh for ensuring smooth sliding.
[0015] The above technical solution of the utility model has at least one of the following advantages or beneficial effects:
[0016] The utility model sets the first thermal insulation cotton on the outer side of the box body, concentrically arranges the first support cylinder and the second support cylinder on the upper end surface of the inner guard plate, and arranges the sealing cover plate device between the first support cylinder and the second support cylinder, so that when the through-wall pipe expands and displaces or swings left and right, the second heat insulation pillow swings accordingly, the reserved amount between the first heat insulation pillow and the second support cylinder can be prevented from penetrating through the gap while the heat preservation is considered, so that the smoke leakage is prevented. BRIEF DESCRIPTION OF DRAWINGS
[0017] The utility model will be further described below in combination with the drawings and examples;
[0018] ATTACHED Figure 1 It is cross section schematic view of one embodiment of the utility model. DETAILED DESCRIPTION
[0019] The embodiment of the utility model will be described in detail below, and the examples of the embodiment are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiment described below by referring to the drawings is exemplary and is only used to explain the utility model, and cannot be understood as a limitation on the utility model.
[0020] In the description of the utility model, it needs to be understood that, if the direction description, such as the direction or positional relation indicated by up, down, front, back, left, right etc. based on the direction or positional relation shown in the drawing, is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as the limitation of the utility model.
[0021] In the description of the utility model, the meaning of several is one or more, and the meaning of multiple is more than two, and greater than, less than, more than etc. are not included in the number, and above, below, within etc. are included in the number. If the first and the second are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.
[0022] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features.
[0023] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection or movable connection, or detachable connection or non-detachable connection, or integrally connected, can be mechanical connection, or electrical connection or can communicate with each other, can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements, indirect communication or the interaction relationship of two elements.
[0024] The following disclosure provides many different embodiments or examples for realizing different schemes of the utility model.
[0025] Referring to the drawings Figure 1 As shown in the drawings, a heat preservation box for wall-penetrating pipe of waste heat boiler in furnace, including box body 1 for wall-penetrating pipe, first heat preservation cotton 2 set on the outside of box body 1, sealing cover plate device, heat insulation assembly and anti-collision device 7 for protecting wall-penetrating pipe.
[0026] In an embodiment of the utility model, box body 1 includes first support cylinder 11 fixed on the end face of inner guard plate 3 and second support cylinder 12 concentrically arranged with first support cylinder 11, heat insulation assembly includes first heat insulation pillow 5 sleeved on the outer circular face of first support cylinder 11 and second heat insulation pillow 6 arranged in second support cylinder 12 and slidably connected with wall-penetrating pipe, first support cylinder 11 is used to protect first heat insulation pillow 5 from being damaged when wall-penetrating pipe displaces, and plays the role of supporting second support cylinder 12 and sealing cover plate device.
[0027] In one embodiment of the utility model, sealing cover plate device is arranged between first support cylinder 11 and second support cylinder 12, and sealing cover plate device includes second cover plate 42 slidingly connected with through-wall pipe and first cover plate 41 for connecting first support cylinder 11 and second support cylinder 12, through hole for through-wall pipe to pass through is respectively arranged in first cover plate 41 and second cover plate 42, second support cylinder 12 is welded on first cover plate 41, and the role of protecting second heat insulation pillow 6 and supporting heat preservation box is played.
[0028] In one embodiment of the utility model, first cover plate 41 is arranged below second cover plate 42, second heat insulation pillow 6 and second cover plate 42 swing when through-wall pipe expands displacement, swings left and right, can consider heat preservation at the same time, prevent a small amount of flue gas and heat from penetrating between first heat insulation pillow 5 and second support cylinder 12 in the reserved amount through the gap, thereby preventing flue gas leakage.
[0029] In one embodiment of the utility model, the outer diameter of second cover plate 42 is greater than the sum of the inner diameter of first cover plate 41 and the maximum displacement of through-wall pipe in the hot state horizontal direction, and the outer diameter of second cover plate 42 is less than the difference between the outer diameter of first cover plate 41 and the maximum displacement of through-wall pipe in the hot state horizontal direction, so that the expansion displacement of through-wall pipe in the horizontal direction can be met, and effective blocking and sealing of flue gas in the waste heat boiler can be ensured, and flue gas passage is prevented when through-wall pipe frequently moves.
[0030] In one embodiment of the utility model, the surface of second heat insulation pillow 6 is sleeved with a close-mesh steel wire mesh for ensuring smooth sliding, and second heat insulation pillow 6 and sealing cover plate device can swing left and right to closely fit through-wall pipe, so that first support cylinder 11 and second support cylinder 12 always maintain a closed state, a small amount of flue gas and heat are prevented from penetrating between first heat insulation pillow 5 and second support cylinder 12 in the reserved amount through the gap, and flue gas leakage is prevented.
[0031] In one embodiment of the utility model, the anti-collision device 7 is arranged on the outside of the box body 1, and is used for protecting the through-wall pipe and isolating the heat transfer between the inside and outside of the furnace. The anti-collision device 7 includes an anti-collision pipe 71 perpendicular to the inner guard plate 3 and a second heat preservation cotton 72 sleeved on the anti-collision pipe 71. Since the positions of the anti-collision pipe 71 and the through-wall pipe are relatively close, the second heat preservation cotton 72 is sleeved on the anti-collision pipe 71 in consideration of heat insulation.
[0032] In one embodiment of the utility model, the inner guard plate 8 and two bolt assemblies 9 for connecting the inner guard plate 3 are arranged in parallel above the inner guard plate 3. The two bolt assemblies 9 are respectively arranged on the two sides of the through-wall pipe. The bolt assembly 9 includes a screw rod that can pass through the bottom edge of the first heat preservation cotton 2. One end of the screw rod is fixedly connected with the inner guard plate 3, and the other end of the screw rod is provided with a locking nut.
[0033] In one embodiment of the utility model, first support cylinder 11 and second support cylinder 12 are respectively provided with first cavity and second cavity, and the inner diameter of first cavity is greater than the outer diameter of through-wall pipe, and the inner diameter of first cavity is less than the inner diameter of second cavity, so that the through-wall pipe can smoothly pass through and leave enough expansion allowance.
[0034] In one embodiment of the utility model, the inner diameter of second cavity is greater than the outer diameter of second heat insulation pillow 6, so that when the through-wall pipe expands and displaces, left and right swings, second heat insulation pillow 6 swings at the same time, and swing space is provided.
[0035] The through-wall pipe furnace inner heat preservation box of the waste heat boiler can satisfy the expansion displacement of the through-wall pipe in the vertical direction, and the expansion displacement in the horizontal direction is up to 50mm, so that the heat preservation near the through-wall pipe can satisfy the frequent expansion action of the through-wall pipe of the daily start-stop unit, and the temperature of the furnace outer wall during operation does not exceed the temperature.
[0036] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.
Claims
1. A furnace inner heat insulating box for a waste heat boiler penetration, characterized by, The utility model provides a box body (1) and first heat preservation cotton (2) outside the box body (1) are included for the through -wall pipe passes through, the box body (1) includes the first support cylinder (11) fixed on the upper end surface of inner guard board (3) and the concentric setting of second support cylinder (12) with first support cylinder (11), the first support cylinder (11) with the second support cylinder (12) between being equipped with sealing cover plate device, the first support cylinder (11) outer circular surface is equipped with first heat insulation pillow (5), the second support cylinder (12) is equipped with the second heat insulation pillow (6) of sliding connection with through -wall pipe, the second heat insulation pillow (6) and sealing cover plate device can be close to through -wall pipe left and right swing, so that the first support cylinder (11) with second support cylinder (12) always keep closed state.
2. The waste heat boiler penetration in situ insulation box according to claim 1, characterized in that: The sealing cover plate device includes a second cover plate (42) slidingly connected with the through-wall pipe and a first cover plate (41) for connecting the first support cylinder (11) and the second support cylinder (12), wherein the first cover plate (41) and the second cover plate (42) are respectively provided with through holes for the through-wall pipe to pass through.
3. The waste heat boiler penetration in situ insulation box according to claim 2, characterized in that: The first cover plate (41) is located below the second cover plate (42), and the second cover plate (42) can swing left and right with the through-wall pipe.
4. The waste heat boiler penetration in-situ insulation box according to claim 2, characterized in that: The outer diameter of the second cover plate (42) is greater than the sum of the inner diameter of the first cover plate (41) and the maximum displacement of the through-wall pipe in the horizontal direction in the hot state.
5. The waste heat boiler penetration in-situ insulation box according to claim 2, characterized in that: The outer diameter of the second cover plate (42) is less than the difference between the outer diameter of the first cover plate (41) and the maximum displacement of the through-wall pipe in the horizontal direction in the hot state.
6. The waste heat boiler penetration in-situ insulation box of claim 1, wherein: The outer side of the box body (1) is provided with a collision protection device (7) for protecting the through-wall pipe, and the collision protection device (7) includes an anti-collision pipe (71) perpendicular to the inner guard plate (3) and a second heat preservation cotton (72) sleeved on the anti-collision pipe (71).
7. A waste heat boiler penetration in-situ insulation box according to claim 6, characterized in that: The upper side of the inner guard plate (3) is parallel to the inner guard plate and at least two bolt assemblies (9) for connecting the inner guard plate (3), and the two bolt assemblies (9) are respectively arranged on both sides of the through-wall pipe.
8. The waste heat boiler penetration in-situ insulation box of claim 1, wherein: The first support cylinder (11) and the second support cylinder (12) are respectively provided with a first cavity and a second cavity, the inner diameter of the first cavity is greater than the outer diameter of the through-wall pipe, and the inner diameter of the first cavity is less than the inner diameter of the second cavity.
9. The waste heat boiler penetration in-situ insulation box according to claim 8, characterized in that: The inner diameter of the second cavity is greater than the outer diameter of the second heat insulation pillow (6).
10. The waste heat boiler penetration in-situ insulation box according to claim 9, characterized in that: The surface of the second heat insulation pillow (6) is sleeved with a dense steel wire mesh for ensuring smooth sliding.