Integrally-coated boiler large screen superheater heat preservation structure

Abstract

The utility model relates to the technical field of superheater heat preservation, and provides an integrally-coated boiler large-screen superheater heat preservation structure which is used in cooperation with a boiler and a large-screen superheater, the boiler comprises a roof pipe, the large-screen superheater comprises a plurality of sets of pipe screens, and the pipe screens are arranged on the roof pipe. A sealing box is arranged between the tube panel and the roof tube, an external heat preservation assembly is included, the external heat preservation assembly is arranged above the roof tube, the external heat preservation assembly comprises a heat-resisting steel plate screen frame, the heat-resisting steel plate screen frame covers the outer side of the large screen superheater, and the periphery of the heat-resisting steel plate screen frame is fixedly connected with the corresponding sealing box; the aluminum silicate fiber felt layer is laid on the outer surface of the heat-resistant steel plate screen frame, and the periphery of the aluminum silicate fiber felt layer is connected with the boiler; the outer surface of the aluminum silicate fiber felt layer is covered with the adjustable galvanized wire mesh, and the periphery of the adjustable galvanized wire mesh is connected with the boiler.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of superheater heat preservation, and particularly relates to a whole cladding type boiler large-screen superheater heat preservation structure. BACKGROUND

[0002] With the rapid development of economy, the demand for electricity of industry and residents is still rapidly rising. As a stable power source, the boiler still plays an important role in the industry and power industry.

[0003] The heat preservation of the boiler plays an extremely important role in improving the thermal efficiency of the unit, reducing heat loss and reducing energy consumption. The boiler arrangement mode often adopts the structure of a large-screen superheater. The large-screen superheater includes a header and a plurality of groups of tube panels. The plurality of groups of tube panels will respectively penetrate the ceiling pipe of the boiler. Therefore, the heat preservation structure will be installed on the part of the tube panel penetrating the ceiling pipe. The quality of the heat preservation structure is directly related to whether the on-site construction can be successfully carried out and the stable operation of the boiler in the later period. The current traditional heat preservation structure has the problems of difficult on-site construction and the heat preservation thickness in some areas not meeting the requirements. SUMMARY

[0004] In view of the defects in the prior art, the utility model aims to provide a whole cladding type boiler large-screen superheater heat preservation structure to solve the problems of difficult on-site construction and the heat preservation thickness in some areas not meeting the requirements.

[0005] In order to achieve the above-mentioned purpose, the utility model realizes the technical scheme as follows: a whole cladding type boiler large-screen superheater heat preservation structure is used in cooperation with a boiler and a large-screen superheater. The boiler includes a ceiling pipe. The large-screen superheater includes a plurality of groups of tube panels. A sealing box is arranged between the tube panels and the ceiling pipe. An external heat preservation assembly is arranged above the ceiling pipe. The external heat preservation assembly includes:

[0006] A heat-resistant steel plate mesh frame is arranged on the outer side of the large-screen superheater and is fixedly connected with the corresponding sealing box around.

[0007] An aluminum silicate fiber felt layer is arranged on the outer surface of the heat-resistant steel plate mesh frame and is connected with the boiler around.

[0008] A flexible galvanized iron wire mesh is arranged on the outer surface of the aluminum silicate fiber felt layer and is connected with the boiler around.

[0009] Further, a plurality of heat preservation nails are arranged between the heat-resistant steel plate mesh frame and the flexible galvanized iron wire mesh. The first end of the heat preservation nail is fixedly connected with the heat-resistant steel plate mesh frame. The second end of the heat preservation nail is fixedly connected with the flexible galvanized iron wire mesh after penetrating the aluminum silicate fiber felt layer.

[0010] Furthermore, it also includes multiple self-locking pressure plates, which correspond one-to-one to the multiple insulation nails. The second ends of the insulation nails pass through the aluminum silicate fiber felt layer, the active galvanized wire mesh and the self-locking pressure plates and are bent at 90 degrees.

[0011] Furthermore, a plurality of heat-resistant round steels are arranged between the heat-resistant steel plate mesh frame and the large-screen superheater, and the heat-resistant round steels are fixedly connected to the heat-resistant steel plate mesh frame and the large-screen superheater.

[0012] Furthermore, the outer surface of the flexible galvanized wire mesh is covered with a layer of color steel plate.

[0013] Furthermore, a slightly expandable plastic layer is laid on the lower part of the sealing box.

[0014] Furthermore, the upper surface of the slightly expandable plastic layer is filled with aluminum silicate fiber cotton impregnated with a high-temperature adhesive.

[0015] Furthermore, the outer surface of the tube panel is painted with 2mm thick asphalt paint.

[0016] The beneficial effects of the present invention are as follows: the present invention provides an integrally wrapped boiler large-screen superheater insulation structure, in which an external insulation component composed of a heat-resistant steel plate mesh frame, an aluminum silicate fiber felt layer and a flexible galvanized wire mesh is arranged on the outside of the large-screen superheater. The overall structure is simple, which solves the problems of on-site construction difficulties and the insulation thickness in some areas not meeting the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0019] Figure 3 It is a schematic diagram of the local structure of the utility model.

[0020] Figure numbers: 10-boiler, 11-ceiling pipe, 12-ceiling insulation layer, 13-water-cooled wall insulation layer, 20-large screen superheater, 21-header, 22-tube screen, 23-sealing box, 30-insulation nail, 31-self-locking pressure plate, 40-heat-resistant round steel, 50-color steel plate, 60-micro-expandable plastic layer, 61-aluminum silicate fiber cotton, 70-external insulation component, 71-heat-resistant steel plate mesh frame, 72-aluminum silicate fiber felt layer, 73-active galvanized wire mesh. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] In this application, unless otherwise specified or limited, the terms "connect" and "fix" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0023] In the description of this application, it should be understood that the terms "longitudinal", "transverse", "horizontal", "top", "bottom", "up", "down", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0025] like Figure 1-Figure 3 As shown, the present invention provides an integrally wrapped boiler large-panel superheater insulation structure for use with a boiler 10 and a large-panel superheater 20. The boiler 10 includes a ceiling pipe 11, a ceiling insulation layer 12, and a water-cooled wall insulation layer 13. The large-panel superheater 20 includes a header 21 and several groups of tube panels 22. A sealing box 23 is provided between the tube panels 22 and the ceiling pipe 11. The above contents are all prior art, and the specific structure is not repeated here. The present invention also includes an external insulation component 70, which is arranged above the ceiling pipe 11 and includes a heat-resistant steel plate mesh frame 71, an aluminum silicate fiber felt layer 72, and a flexible galvanized wire mesh 73.

[0026] The heat-resistant steel plate mesh frame 71 covers the outside of the large-screen superheater 20 and is fixedly connected to the corresponding sealing box 23 on all four sides.

[0027] The aluminum silicate fiber felt layer 72 is laid on the outer surface of the heat-resistant steel plate net frame 71 and connected with the ceiling heat preservation layer 12 and the water cooling wall heat preservation layer 13 around. Specifically, the front and rear sides of the aluminum silicate fiber felt layer 72 are connected with the ceiling heat preservation layer 12 respectively, the left and right sides of the aluminum silicate fiber felt layer 72 are connected with the water cooling wall heat preservation layer 13 respectively, and the whole is formed.

[0028] The live galvanized iron wire mesh 73 covers the outer surface of the aluminum silicate fiber felt layer 72 and is connected with the ceiling heat preservation layer 12 and the water cooling wall heat preservation layer 13 around. Specifically, the front and rear sides of the live galvanized iron wire mesh 73 are connected with the ceiling heat preservation layer 12 respectively, the left and right sides of the live galvanized iron wire mesh 73 are connected with the water cooling wall heat preservation layer 13 respectively, and the whole is formed.

[0029] The utility model discloses a heat preservation assembly 70 is set up to the outside of big screen superheater 20 by heat-resistant steel plate net frame 71, aluminum silicate fiber felt layer 72 and live galvanized iron wire mesh 73, and the whole structure is simple, solves the scene construction difficult and the partial area heat preservation thickness reaches the problem such as not meeting the requirement.

[0030] In an embodiment, a plurality of heat preservation nails 30 are arranged between the heat-resistant steel plate net frame 71 and the live galvanized iron wire mesh 73, the first end of the heat preservation nail 30 is fixedly connected with the heat-resistant steel plate net frame 71, the second end of the heat preservation nail 30 is connected with the live galvanized iron wire mesh 73 after penetrating through the aluminum silicate fiber felt layer 72, and the heat preservation nail 30 can improve the overall strength of the structure.

[0031] In an embodiment, a plurality of self-locking pressing plates 31 are further included, and the plurality of self-locking pressing plates 31 correspond to the plurality of heat preservation nails 30 one by one. The second end of the heat preservation nail 30 is bent by 90° after penetrating through the aluminum silicate fiber felt layer 72, the live galvanized iron wire mesh 73 and the self-locking pressing plate 31.

[0032] After the aluminum silicate fiber felt layer 72 and the live galvanized iron wire mesh 73 are pressed tightly, the self-locking pressing plate 31 is installed at the second end of the heat preservation nail 30, the heat preservation nail 30 is bent by 90° after the self-locking pressing plate 31 is installed, the self-locking pressing plate 31 is fixed, and the aluminum silicate fiber felt layer 72 and the live galvanized iron wire mesh 73 are pressed tightly.

[0033] In an embodiment, a plurality of heat-resistant round steels 40 are arranged between the heat-resistant steel plate net frame 71 and the big screen superheater 20, and the heat-resistant round steels 40 are connected with the heat-resistant steel plate net frame 71 and the big screen superheater 20 through heat-resistant iron wires.

[0034] The plurality of heat-resistant round steels are wound and fixed on the header 21 and the plurality of groups of tube panels 22 at a certain interval, cover the top, the front and rear sides and the left and right sides of the whole big screen superheater 20, and the heat-resistant steel plate net frame 71 is bundled on the heat-resistant round steels through the heat-resistant iron wires. The heat-resistant round steels 40 can play a supporting role of the structure to avoid collapse caused by too large supporting interval of the big screen superheater 20.

[0035] In one embodiment, the outer surface of the flexible galvanized wire mesh 73 is covered with a layer of color-coated steel plate 50 to improve the overall aesthetics.

[0036] The front and rear sides of the color steel plate 50 are respectively connected to the ceiling insulation layer 12, and the left and right sides are respectively connected to the water-cooled wall insulation layer 13 to form a whole. So far, the external insulation assembly 70 of the large screen superheater 20 through the ceiling is laid.

[0037] In one embodiment, a slightly expanded plastic layer 60 is laid on the lower portion of the sealing box 23 to increase the rigidity of the ceiling and to isolate the aluminum silicate fiber felt layer 72 from being directly eroded by the high-temperature flue gas in the boiler 10 .

[0038] In one embodiment, the upper surface of the slightly-expanded plastic layer 60 is filled with aluminum silicate fiber wool 61 impregnated with a high-temperature adhesive, and the gaps are compacted.

[0039] In one embodiment, the outer surface of the tube panel 22 is painted with 2 mm thick asphalt paint.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.

[0041] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An integrally wrapped boiler large-panel superheater insulation structure, used in conjunction with a boiler and a large-panel superheater, wherein the boiler includes a ceiling tube, and the large-panel superheater includes a plurality of tube panels, with a sealing box provided between the tube panels and the ceiling tubes, characterized in that: The external thermal insulation component is provided above the ceiling pipe and includes: A heat-resistant steel plate mesh frame, the heat-resistant steel plate mesh frame is covered on the outside of the large-screen superheater and is fixedly connected to the corresponding sealing box on all sides; an aluminum silicate fiber felt layer, the aluminum silicate fiber felt layer being laid on the outer surface of the heat-resistant steel plate mesh frame and connected to the boiler on all sides; An active galvanized wire mesh covers the outer surface of the aluminum silicate fiber felt layer and is connected to the boiler on all sides.

2. The integrally wrapped large-screen boiler superheater insulation structure according to claim 1 is characterized by: A plurality of insulation nails are arranged at intervals between the heat-resistant steel plate mesh frame and the flexible galvanized wire mesh. The first ends of the insulation nails are fixedly connected to the heat-resistant steel plate mesh frame, and the second ends of the insulation nails pass through the aluminum silicate fiber felt layer and are fixedly connected to the flexible galvanized wire mesh.

3. The integrally wrapped large-screen boiler superheater insulation structure according to claim 2 is characterized by: It also includes multiple self-locking pressure plates, which correspond one-to-one to the multiple insulation nails. The second ends of the insulation nails pass through the aluminum silicate fiber felt layer, the active galvanized wire mesh and the self-locking pressure plates and then bend 90 degrees.

4. The integrally wrapped large-screen boiler superheater insulation structure according to claim 1 is characterized by: A plurality of heat-resistant round steels are arranged between the heat-resistant steel plate mesh frame and the large-screen superheater, and the heat-resistant round steels are fixedly connected to the heat-resistant steel plate mesh frame and the large-screen superheater.

5. The integrally wrapped large-screen boiler superheater insulation structure according to claim 1 is characterized by: The outer surface of the flexible galvanized wire mesh is covered with a layer of color steel plate.

6. The integrally wrapped large-screen boiler superheater insulation structure according to claim 2, characterized in that: A slightly expandable plastic layer is laid on the lower part of the sealing box.

7. The integrally wrapped large-panel boiler superheater insulation structure according to claim 6, characterized in that: The upper surface of the slightly expandable plastic layer is filled with aluminum silicate fiber cotton impregnated with a high-temperature adhesive.

8. The integrally wrapped large-panel boiler superheater insulation structure according to claim 6 is characterized by: The outer surface of the tube panel is painted with 2mm thick asphalt paint.

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