Integrally-coated boiler large screen superheater heat preservation structure

Abstract

The invention 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 in 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 invention relates to the technical field of superheater insulation, and in particular to an integrally wrapped boiler large-screen superheater insulation structure. Background Art

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

[0003] The thermal insulation of the boiler plays an extremely important role in improving the thermal efficiency of the unit, reducing heat dissipation losses, and reducing energy consumption. The boiler layout often adopts a large-screen superheater structure, which includes a header and several groups of tube panels. Several groups of tube panels will pass through the ceiling pipes of the boiler respectively. Therefore, the insulation structure will be installed on the part where the tube panel passes through the ceiling pipe. The quality of the insulation structure is directly related to whether the construction can be carried out smoothly on site and the stable operation of the boiler in the later stage. At present, the traditional insulation structure has problems such as difficulty in on-site construction and the insulation thickness in some areas does not meet the requirements. Summary of the invention

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide an integrally wrapped boiler large-screen superheater insulation structure to solve the problems of difficult on-site construction and insulation thickness in some areas not meeting the requirements.

[0005] In order to achieve the above object, the present invention is implemented by the following technical scheme: an integrally wrapped boiler large-panel superheater insulation structure, used in conjunction with a boiler and a large-panel superheater, the boiler includes a ceiling pipe, the large-panel superheater includes a plurality of tube panels, a sealing box is provided between the tube panel and the ceiling pipe, including an external insulation component, the external insulation component is provided above the ceiling pipe, and the external insulation component includes:

[0006] 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;

[0007] An aluminum silicate fiber felt layer, which is laid on the outer surface of the heat-resistant steel plate mesh frame and is connected to the boiler on all sides;

[0008] An active galvanized wire mesh is covered on the outer surface of the aluminum silicate fiber felt layer and is connected to the boiler on all sides.

[0009] Furthermore, 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.

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

[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 wool impregnated with a high-temperature adhesive.

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

[0016] Beneficial effects of the invention: The 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 difficult on-site construction and insulation thickness in some areas not meeting the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[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 present invention.

[0020] Figure numerals: 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 easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] In this application, unless otherwise clearly specified and limited, the terms "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "horizontal", "top", "bottom", "up", "down", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and 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, and therefore should not be understood as a limitation 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 technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0025] like Figure 1-Figure 3 As shown, the present invention provides an integrally wrapped boiler large-screen superheater insulation structure, which is used in conjunction with a boiler 10 and a large-screen 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-screen superheater 20 includes a header 21 and a plurality of tube panels 22. A sealing box 23 is provided between the tube panel 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. The external insulation component 70 includes a heat-resistant steel plate mesh frame 71, an aluminum silicate fiber felt layer 72, and an active 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 sides.

[0027] The aluminum silicate fiber felt layer 72 is laid on the outer surface of the heat-resistant steel plate mesh frame 71, and is connected to the ceiling insulation layer 12 and the water-cooled wall insulation layer 13 on all sides. Specifically, the front and rear sides of the aluminum silicate fiber felt layer 72 are respectively connected to the ceiling insulation layer 12, and the left and right sides of the aluminum silicate fiber felt layer 72 are respectively connected to the water-cooled wall insulation layer 13 to form a whole.

[0028] The active galvanized wire mesh 73 covers the outer surface of the aluminum silicate fiber felt layer 72, and is connected to the ceiling insulation layer 12 and the water-cooled wall insulation layer 13 on all sides. Specifically, the front and rear sides of the active galvanized wire mesh 73 are respectively connected to the ceiling insulation layer 12, and the left and right sides of the active galvanized wire mesh 73 are respectively connected to the water-cooled wall insulation layer 13 to form a whole.

[0029] The present invention arranges an external insulation component 70 composed of a heat-resistant steel plate mesh frame 71, an aluminum silicate fiber felt layer 72 and a flexible galvanized wire mesh 73 on the outside of the large-screen superheater 20. The overall structure is simple, which solves the problems of difficult on-site construction and insulation thickness in some areas not meeting the requirements.

[0030] In one embodiment, a plurality of insulation nails 30 are arranged at intervals between the heat-resistant steel plate mesh frame 71 and the flexible galvanized wire mesh 73. The first end of the insulation nail 30 is fixedly connected to the heat-resistant steel plate mesh frame 71, and the second end of the insulation nail 30 passes through the aluminum silicate fiber felt layer 72 and is connected to the flexible galvanized wire mesh 73. The insulation nail 30 can improve the overall strength of the structure.

[0031] In one embodiment, it further comprises a plurality of self-locking pressing plates 31, which correspond one to one with the plurality of heat preservation nails 30. The second end of the heat preservation nail 30 passes through the aluminum silicate fiber felt layer 72, the active galvanized wire mesh 73 and the self-locking pressing plate 31 and then bends 90 degrees.

[0032] After the aluminum silicate fiber felt layer 72 and the flexible galvanized wire mesh 73 are pressed tightly, the self-locking pressure plate 31 is installed at the second end of the insulation nail 30. After the self-locking pressure plate 31 is installed, the insulation nail 30 is bent 90° to fix the self-locking pressure plate 31 and press the aluminum silicate fiber felt layer 72 and the flexible galvanized wire mesh 73.

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

[0034] A plurality of heat-resistant round steels are wound and tightened at a certain interval on the header 21 and a plurality of groups of tube panels 22 to cover the top, front and rear sides, and left and right sides of the entire large-screen superheater 20. The heat-resistant steel plate mesh frame 71 is tied to the heat-resistant round steel by heat-resistant iron wire. The heat-resistant round steel 40 can play a supporting role in this structure to prevent the large-screen superheater 20 from collapsing due to excessive support spacing.

[0035] In one embodiment, the outer surface of the flexible galvanized wire mesh 73 is covered with a layer of color 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 component 70 of the large screen superheater 20 passing through the ceiling is laid.

[0037] In one embodiment, a slightly expanded plastic layer 60 is laid on the lower part 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 the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary 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 falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes 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, the boiler comprising a ceiling pipe, the large-panel superheater comprising a plurality of tube panels, a sealing box being arranged between the tube panel and the ceiling pipe, characterized in that: The invention comprises an external heat-insulating assembly, wherein the external heat-insulating assembly is arranged above the ceiling pipe, and the external heat-insulating assembly comprises: 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, which is laid on the outer surface of the heat-resistant steel plate mesh frame and is connected to the boiler on all sides; An active galvanized wire mesh is covered on the outer surface of the aluminum silicate fiber felt layer and is connected to the boiler on all sides.

2. The integrally wrapped boiler large-screen 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 boiler large-screen superheater insulation structure according to claim 2 is characterized by: It also includes a plurality of self-locking pressure plates, which correspond one to one with the plurality of 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 are bent at 90 degrees.

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

7. The integrally wrapped boiler large-screen superheater insulation structure according to claim 6 is characterized by: The upper surface of the micro-expandable plastic layer is filled with aluminum silicate fiber wool impregnated with a high-temperature adhesive.

8. The integrally wrapped boiler large-screen 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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