Heat preservation structure of boiler membrane type water wall tube

Abstract

The utility model discloses a heat preservation structure of a boiler membrane water wall tube, and relates to the technical field of boiler heat preservation. The heat preservation structure comprises a heat preservation structure body which is fixed to the outer wall of a boiler ignition face and corresponds to a working pipe in position, the heat preservation structure body comprises a first heat preservation layer and a second heat preservation layer, the first heat preservation layer is fixedly connected to the outer wall of the boiler ignition face, and a matched groove is formed in the side, facing the boiler ignition face, of the first heat preservation layer; a second insulating layer; a high-temperature-resistant anti-radiation layer; an outer protection plate; and an anti-emission layer. According to the heat preservation structure, the matching groove matched with the outer wall of the working pipe is formed in the first heat preservation layer which is in direct contact with the ignition surface of the boiler in the heat preservation structure, so that a gap between the heat preservation structure and the working pipe is reduced, and meanwhile, a high-temperature-resistant anti-radiation layer, a second heat preservation layer, an anti-emission layer and an outer protection plate are arranged in the heat preservation layer; the heat preservation effect of the heat preservation structure on the outer wall of the working pipe on the boiler ignition face can be further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler thermal insulation, in particular to a thermal insulation structure of a boiler membrane water-cooled wall tube. Background Art

[0002] The boiler membrane water-cooled wall tube is one of the components of the boiler. It can absorb the heat in the furnace and convert it into the internal energy of the steam-water mixture, while protecting the furnace wall to prevent the furnace wall from overheating and deformation. In order to prevent heat from being lost to the surrounding environment, improve the thermal efficiency of the boiler, and reduce the impact of thermal barriers and shrinkage on the water-cooled wall tubes, and reduce fatigue damage to the pipeline, it is necessary to perform insulation treatment on the boiler membrane water-cooled wall tubes.

[0003] At present, the heating surface area of ​​the boiler membrane water-cooled wall tube accounts for 40%-45% of the entire boiler heating surface. The thermal insulation effect of the boiler body affects the thermal efficiency of the boiler. The insulation surface of the membrane water-cooled wall tube is in a "⌒" shape. Nowadays, the insulation measures for the membrane water-cooled wall tubes on the boiler are generally to use plate insulation, but this will cause a large gap between the concave surface and the water cooling, making the insulation effect of the membrane water-cooled wall tubes on the boiler poor, thereby affecting the insulation effect of the membrane water-cooled wall tubes on the boiler. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an insulation structure for a boiler membrane water-cooled wall tube, which solves the problem that when the membrane water-cooled wall tubes on a traditional boiler are insulated with plates, there is a large gap between the two, which affects the insulation effect.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a thermal insulation structure of a boiler membrane water-cooled wall tube, including a thermal insulation structure fixed to the outer wall of the boiler firing surface and corresponding to the working tube, the thermal insulation structure includes:

[0006] A first thermal insulation layer, wherein the first thermal insulation layer is fixedly connected to the outer wall of the boiler firing surface, a matching groove is provided on the side of the first thermal insulation layer facing the boiler firing surface, and the first thermal insulation layer matches with the outer wall of the working tube through the matching groove;

[0007] A second thermal insulation layer, the second thermal insulation layer is arranged on a side of the first thermal insulation layer away from the boiler firing surface;

[0008] A high temperature resistant anti-radiation layer, wherein the high temperature resistant anti-radiation layer is fixedly connected between the first thermal insulation layer and the second thermal insulation layer, and the high temperature resistant anti-radiation layer is used to reflect the temperature seeping from the side wall of the first thermal insulation layer;

[0009] An outer protective plate, the outer protective plate is located on a side of the second thermal insulation layer away from the high temperature resistant anti-radiation layer, and the outer protective plate is used to protect the outer wall of the second thermal insulation layer;

[0010] The anti-reflection layer is fixedly connected between the outer protection plate and the second thermal insulation layer.

[0011] Preferably, the first thermal insulation layer and the second thermal insulation layer are both made of high-temperature glass wool, and the thickness of the first thermal insulation layer is greater than the thickness of the second thermal insulation layer.

[0012] Preferably, a first polypropylene layer and a first glass fiber membrane layer are fixedly provided on the side of the first insulation layer facing the boiler firing surface, and the first glass fiber membrane layer is located on the side of the first polypropylene layer facing away from the first insulation layer.

[0013] Preferably, a second glass fiber membrane layer and a second polypropylene layer are fixedly provided on the side of the first thermal insulation layer facing the high temperature resistant anti-radiation layer, and the second polypropylene layer is located on the side of the second glass fiber membrane layer facing away from the first thermal insulation layer.

[0014] Preferably, the high temperature resistant anti-radiation layer is a double-layer structure, comprising an aluminum oxide reflective layer and a rock wool insulation layer, wherein the rock wool insulation layer is located on a side of the aluminum oxide reflective layer away from the first insulation layer.

[0015] Preferably, the aluminum oxide reflective layer is made of aluminum oxide, the rock wool insulation layer is made of rock wool, and the anti-reflective layer is made of stainless steel aluminum foil.

[0016] Preferably, the outer protective plate comprises an outer protective layer, a waterproof layer is fixedly provided on the side of the outer protective layer facing the anti-reflective layer, and a heat insulating layer is fixedly provided on the side of the waterproof layer facing away from the outer protective layer.

[0017] Preferably, the heat insulation layer is made of stainless steel, and a corrugated surface is provided on a side of the heat insulation layer facing away from the anti-reflective layer.

[0018] The utility model discloses a thermal insulation structure of a boiler membrane water-cooled wall tube, which has the following beneficial effects:

[0019] By configuring a matching groove that matches the outer wall of the working tube in the first insulation layer in direct contact with the boiler ignition surface in the insulation structure, the first insulation layer can fit more closely with the outer wall of the working tube on the boiler ignition surface, thereby reducing the gap between the insulation structure and the working tube, thereby making the insulation effect of the insulation structure on the working tube higher. At the same time, with the arrangement of the high-temperature resistant anti-radiation layer, the second insulation layer, the anti-emission layer and the outer protective plate in the insulation layer, the insulation effect of the insulation structure on the outer wall of the working tube on the boiler ignition surface can be further enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a front sectional structural schematic diagram of the utility model;

[0022] Figure 2 This is a front cross-sectional structural schematic diagram of the first thermal insulation layer of the utility model;

[0023] Figure 3 This is a front cross-sectional structural schematic diagram of the first reflective layer of the utility model;

[0024] Figure 4 It is a front cross-sectional structural schematic diagram of the outer protection plate of the utility model;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the outer protection plate of the utility model.

[0026] In the figure: 100, working pipe; 101, boiler firing surface; 200, first insulation layer; 201, first polypropylene layer; 202, first glass fiber membrane layer; 203, second glass fiber membrane layer; 204, second polypropylene layer; 205, matching groove; 300, high temperature resistant anti-radiation layer; 301, aluminum oxide reflective layer; 302, rock wool insulation layer; 400, second insulation layer; 500, anti-reflection layer; 600, outer protective plate; 601, outer protective layer; 602, waterproof layer; 603, thermal insulation layer; 604, corrugated surface. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The embodiment of the present application provides an insulation structure for the membrane water-cooled wall tubes of a boiler, thereby solving the problem that when the membrane water-cooled wall tubes on the traditional boiler are insulated by plate materials, there is a large gap between the two, which affects the insulation effect. The first insulation layer 200 in the insulation structure is tightly fitted with the outer wall of the working tube 100 on the side facing the boiler firing surface 101 through the configured matching groove 205, thereby reducing the gap between the outer wall of the working tube 100 and the insulation structure, so that the insulation structure has a better insulation effect on the outer wall of the working tube 100 on the boiler firing surface 101.

[0029] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] The utility model embodiment discloses a thermal insulation structure of a boiler membrane water-cooled wall tube.

[0031] According to the attached Figure 1As shown in Figure 5, the heat preservation structure includes a heat preservation structure fixed to the outer wall of the boiler firing surface 101 and corresponding to the working tube 100. The heat preservation structure includes a first heat preservation layer 200, a high temperature resistant anti-radiation layer 300, a second heat preservation layer 400, an anti-radiation layer 500 and an outer protective plate 600 which are sequentially distributed along the outer extension direction of the boiler firing surface 101. The first heat preservation layer 200 is fixedly connected to the outer wall of the boiler firing surface 101. The first heat preservation layer 200 is provided with a matching groove 205 on one side facing the boiler firing surface 101. The first heat preservation layer 200 is provided with a matching groove 205. The groove 205 matches the outer wall of the working tube 100. When the first insulation layer 200 is connected and fixed to the boiler firing surface 101, the first insulation layer 200 matches the outer wall of the working tube 100 through the matching groove 205 on its outer wall, so that the gap between the first insulation layer 200 and the outer wall of the working tube 100 can be reduced, so that heat cannot flow out from the gap, thereby improving the insulation effect of the insulation structure on the working tube 100; the second insulation layer 400 is arranged on the side of the first insulation layer 200 away from the boiler firing surface 101, and the second insulation layer 400 The thermal insulation performance of the thermal insulation structure can be further improved, the resistance to heat transfer can be increased, and the heat loss can be effectively prevented; the high temperature resistant anti-radiation layer 300 is fixedly connected between the first thermal insulation layer 200 and the second thermal insulation layer 400, and the high temperature resistant anti-radiation layer 300 is used to reflect the temperature seeping from the side wall of the first thermal insulation layer 200. Through the setting of the high temperature resistant anti-radiation layer 300, the temperature behind the first thermal insulation layer 200 can be reflected back to the working surface by utilizing its own reflection effect on heat energy, so as to reduce the heat radiation loss and thus achieve the purpose of thermal insulation; the anti-radiation layer 500 is fixedly connected between the outer protective plate 600 and the second insulation layer 400. The setting of the anti-reflection layer 500 can achieve the purpose of reducing the surface temperature of the pipeline; the outer protective plate 600 is located on the side of the second insulation layer 400 away from the high-temperature resistant anti-radiation layer 300. The outer protective plate 600 is used to protect the outer wall of the second insulation layer 400. The configuration of the outer protective plate 600 can protect the outermost position of the insulation structure (the outer position of the anti-reflection layer 500), and play a role in waterproofing, anti-collision and other safety protection, so that the insulation structure can be used for a longer period of time.

[0032] It should be noted that the first insulation layer 200 and the second insulation layer 400 are both made of high-temperature glass wool. The thickness of the first insulation layer 200 is greater than that of the second insulation layer 400. The high-temperature glass wool has excellent thermal insulation and high-temperature resistance, and can effectively prevent the transfer and loss of heat. At the same time, the high-temperature glass wool also has good sound absorption performance and reduces the propagation of noise. Therefore, using high-temperature glass wool as the manufacturing material of the first insulation layer 200 and the second insulation layer 400 can not only improve the thermal insulation performance of the insulation structure, but also reduce the noise on the boiler and improve the working environment.

[0033] In some embodiments, a first polypropylene layer 201 and a first glass fiber membrane layer 202 are fixedly provided on the side of the first thermal insulation layer 200 facing the boiler firing surface 101, and the first glass fiber membrane layer 202 is located on the side of the first polypropylene layer 201 away from the first thermal insulation layer 200; a second glass fiber membrane layer 203 and a second polypropylene layer 204 are fixedly provided on the side of the first thermal insulation layer 200 facing the high temperature resistant anti-radiation layer 300, and the second polypropylene layer 204 is located on the side of the second glass fiber membrane layer 203 away from the first thermal insulation layer 200, Assembling the first polypropylene layer 201 and the first glass fiber membrane layer 202 on one side and assembling the second polypropylene layer 204 and the second glass fiber membrane layer 203 on the other side of the first thermal insulation layer 200 can effectively protect and isolate the first thermal insulation layer 200, wherein the first polypropylene layer 201 and the second polypropylene layer 204 can improve the resistance to external moisture and enhance the thermal insulation performance of the first thermal insulation layer 200, while the first glass fiber membrane layer 202 and the second glass fiber membrane layer 203 can improve the stability and impact resistance of the first thermal insulation layer 200.

[0034] In addition, the high temperature resistant anti-radiation layer 300 has a double-layer structure, and the high temperature resistant anti-radiation layer 300 includes an aluminum oxide reflective layer 301 and a rock wool insulation layer 302, and the rock wool insulation layer 302 is located on the side of the aluminum oxide reflective layer 301 away from the first insulation layer 200; wherein, the aluminum oxide reflective layer 301 is made of aluminum oxide, the rock wool insulation layer 302 is made of rock wool, and the anti-reflection layer 500 is made of stainless steel aluminum foil. By setting the high temperature resistant anti-radiation layer 300 to a double-layer structure of an aluminum oxide reflective layer 301 and a rock wool insulation layer 302, the heat reflection performance of aluminum oxide and the insulation performance of rock wool can be utilized to make the high temperature resistant anti-radiation layer 300 have higher heat reflection performance, thereby further reducing the loss of heat radiation.

[0035] Furthermore, the outer protective plate 600 includes an outer protective layer 601, a waterproof layer 602 is fixedly provided on the side of the outer protective layer 601 facing the anti-reflective layer 500, and a heat-insulating layer 603 is fixedly provided on the side of the waterproof layer 602 facing away from the outer protective layer 601. The outer protective plate 600 composed of the heat-insulating layer 603, the waterproof layer 602 and the outer protective layer 601 enables the outer protective plate 600 to simultaneously provide the performance of spacing safety protection, waterproof protection and heat-insulating protection, thereby helping to improve the protective effect of the outer protective plate 600 on the outside of the insulation structure; moreover, the heat-insulating layer 603 is made of stainless steel, and a corrugated surface 604 is provided on the side of the heat-insulating layer 603 facing away from the anti-reflective layer 500. The provision of the corrugated surface 604 can increase the surface area of ​​the outer protective layer 601 and improve the water-retaining effect, while having a guiding effect on the water contaminated thereon, making it easier for the water flow on the outer protective layer 601 to gather and slide off.

[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A thermal insulation structure for a boiler membrane water-cooled wall tube, comprising a thermal insulation structure fixed to the outer wall of a boiler firing surface (101) and corresponding to a working tube (100), characterized in that: The thermal insulation structure comprises: A first thermal insulation layer (200), the first thermal insulation layer (200) being fixedly connected to the outer wall of the boiler ignition surface (101), a matching groove (205) being provided on a side of the first thermal insulation layer (200) facing the boiler ignition surface (101), and the first thermal insulation layer (200) being matched with the outer wall of the working tube (100) through the matching groove (205); A second thermal insulation layer (400), the second thermal insulation layer (400) being arranged on a side of the first thermal insulation layer (200) away from a boiler ignition surface (101); A high temperature resistant anti-radiation layer (300), the high temperature resistant anti-radiation layer (300) being fixedly connected between the first thermal insulation layer (200) and the second thermal insulation layer (400), the high temperature resistant anti-radiation layer (300) being used to reflect the temperature seeping from the side wall of the first thermal insulation layer (200); An outer protective plate (600), the outer protective plate (600) being located on a side of the second thermal insulation layer (400) away from the high temperature resistant anti-radiation layer (300), the outer protective plate (600) being used for protecting an outer wall of the second thermal insulation layer (400); An anti-reflection layer (500) is fixedly connected between the outer protection plate (600) and the second thermal insulation layer (400).

2. The thermal insulation structure of a boiler membrane water-cooled wall tube according to claim 1, characterized in that: The first thermal insulation layer (200) and the second thermal insulation layer (400) are both made of high-temperature glass wool, and the thickness of the first thermal insulation layer (200) is greater than the thickness of the second thermal insulation layer (400).

3. The thermal insulation structure of a boiler membrane water-cooled wall tube according to claim 2, characterized in that: A first polypropylene layer (201) and a first glass fiber membrane layer (202) are fixedly provided on the side of the first thermal insulation layer (200) facing the boiler firing surface (101), and the first glass fiber membrane layer (202) is located on the side of the first polypropylene layer (201) facing away from the first thermal insulation layer (200).

4. The thermal insulation structure of a boiler membrane water-cooled wall tube according to claim 3, characterized in that: A second glass fiber membrane layer (203) and a second polypropylene layer (204) are fixedly provided on the side of the first thermal insulation layer (200) facing the high temperature resistant anti-radiation layer (300), and the second polypropylene layer (204) is located on the side of the second glass fiber membrane layer (203) facing away from the first thermal insulation layer (200).

5. The thermal insulation structure of a boiler membrane water-cooled wall tube according to claim 1, characterized in that: The high temperature resistant anti-radiation layer (300) is a double-layer structure, comprising an aluminum oxide reflective layer (301) and a rock wool insulation layer (302), wherein the rock wool insulation layer (302) is located on a side of the aluminum oxide reflective layer (301) away from the first insulation layer (200).

6. The thermal insulation structure of a boiler membrane water-cooled wall tube according to claim 5, characterized in that: The aluminum oxide reflective layer (301) is made of aluminum oxide, the rock wool insulation layer (302) is made of rock wool, and the anti-reflective layer (500) is made of stainless steel aluminum foil.

7. The thermal insulation structure of a boiler membrane water-cooled wall tube according to claim 1, characterized in that: The outer protective plate (600) comprises an outer protective layer (601), a waterproof layer (602) is fixedly provided on the side of the outer protective layer (601) facing the anti-reflective layer (500), and a heat insulation layer (603) is fixedly provided on the side of the waterproof layer (602) facing away from the outer protective layer (601).

8. The thermal insulation structure of a boiler membrane water-cooled wall tube according to claim 7, characterized in that: The heat insulation layer (603) is made of stainless steel, and a corrugated surface (604) is provided on the side of the heat insulation layer (603) facing away from the anti-reflection layer (500).

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