A heating furnace with a low thermal conductive lining holder

Abstract

This utility model relates to the field of heating furnace technology, specifically to a heating furnace with a low thermal conductivity lining support. It includes a modular furnace wall, comprising a steel structure and an insulation lining. The insulation lining includes a backing layer fixed to the steel structure and a cast-in-place layer fixed to the inner side of the backing layer. The key feature is that a support plate is fixed to the steel structure, supporting the bottom of the backing layer; a temporary support plate is detachably connected to the support plate, supporting the bottom of the cast-in-place layer. Compared to existing technologies, this utility model uses the support plate to permanently fix the backing layer, while the temporary support plate only supports the cast-in-place layer during transportation, protecting the insulation lining from damage during transport and hoisting. The temporary support plate is removed before use, thus reducing or eliminating heat transfer between the cast-in-place layer and the support structure during use, reducing the heat transfer area and blocking heat transfer paths, reducing the total heat conduction of the support structure, and improving the heating furnace's insulation effect.

Description

Technical Field

[0001] This utility model relates to the field of heating furnace technology, specifically to a heating furnace with a low thermal conductivity lining support. Background Technology

[0002] To improve thermal efficiency and reduce energy consumption, heating furnaces typically employ insulation structures. The insulation layer is usually composed of all or part of refractory fibers, castables, and refractory bricks.

[0003] In the field of thermal systems, a large amount of insulation layer is typically laid. Its main functions include the following:

[0004] (1) Separate the hot and cold environments in the equipment to reduce heat loss. For example, an insulation layer is often laid on the outer surface of high-temperature equipment and pipelines to reduce heat loss.

[0005] (2) Separate hot and cold components in the equipment to ensure that the ambient temperature of the cold components is below their design temperature limit. For example, the insulation material filling the heat sleeve of the main steam nozzle of the gas-cooled reactor steam generator.

[0006] (3) When the temperature difference between the two sides of the same component is large, laying an insulation layer can reduce the thermal stress of the component. For example, the insulation layer laid on the outside of the main steam tube box of the gas-cooled reactor steam generator can reduce the thermal stress at the tube box flange.

[0007] In typical thermal systems, the primary function of insulation layers is most commonly to prevent heat loss from the thermal system to the atmosphere. This type of insulation layer is usually laid on the outside of the thermal equipment, and its outer surface is in contact with the atmosphere. The structure of this insulation layer is generally simple: after the insulation material is laid, a protective layer (metal or non-metallic and a mortar finish) is wrapped around it. When the ambient medium outside the protective layer has a high flow velocity, a thin metal sheet must be used as the protective layer. When the load exerted by the insulation material on the protective layer is large, a supporting or fixing structure for the protective layer is generally required. From the above description, it can be seen that the protective layer is usually located on the low-temperature side, while the structural components (mainly bearing mechanical loads) are located on the high-temperature side.

[0008] For example, Chinese patent document CN216409724U discloses a lining structure and a high-temperature bell-shaped heating furnace. This lining structure is applied to a high-temperature bell-shaped heating furnace, which includes a bell-shaped inner wall. The lining structure includes a flat layer and an alumina module layer. The flat layer is fitted to the inner wall to level it. The alumina module layer includes several alumina module bodies arranged circumferentially along the inner wall on the side of the flat layer away from the inner wall. Due to its unique high-temperature resistance, the alumina module layer of this lining structure increases heat resistance and blocks heat flow, thereby reducing heat loss, saving energy and reducing consumption. It is also simple and convenient to construct, saving investment and operating costs.

[0009] For example, Chinese patent document CN207455615U discloses a toothed lining retainer ring. This ring is annular with multiple teeth on its outer circumference and multiple expansion joints corresponding to the teeth on its inner circumference. The expansion joints coincide with the symmetrical center lines of the teeth. This toothed lining retainer ring effectively solves the problem of localized temperature rise at the pipe port interface, alleviating the resulting weakening of connection strength. The expansion joints narrow during operation to effectively absorb internal expansion, and return to their original shape when cold, releasing internal stress and achieving equilibrium without affecting the lining.

[0010] The insulation layer of the modular heating furnace is also modularized along with the heating furnace module. It needs to be assembled on site, which requires transportation and hoisting.

[0011] The insulation layer, once modularly produced, possesses sufficient strength and toughness to meet the operational requirements of the heating furnace. However, during transport and hoisting, the insulation layer must withstand additional instantaneous loads, posing a risk of damage.

[0012] like Figure 1 and Figure 3 As shown, the existing structure involves welding a continuous metal plate with an expansion joint 011 to the bottom of the steel structure 01 of the furnace wall as a support plate 03 to protect the insulation lining 02, or as... Figure 2 As shown, protective plates 03 are installed at both the top and bottom of the steel structure 01 to protect the insulation lining 02 from both above and below.

[0013] The existing support plate is permanently connected to the furnace body and has a large contact area with the insulation lining. This structure increases the heat conduction in local areas and adds a hot shear surface to the insulation structure, which is not conducive to the insulation of the heating furnace. Summary of the Invention

[0014] In view of the above-mentioned technical problems, the present invention provides a heating furnace with a low thermal conductivity lining support.

[0015] To achieve the above objectives, this utility model provides the following technical solution:

[0016] A heating furnace with a low thermal conductivity lining support is provided, comprising a modular furnace wall, the modular furnace wall comprising a steel structure and an insulation lining, the insulation lining comprising a backing layer adhered and fixed to the steel structure and a cast layer adhered and fixed to the inner side of the backing layer, characterized in that: a support plate is fixed to the steel structure, the support plate supporting the bottom of the backing layer; a temporary support plate is detachably connected to the support plate, the temporary support plate supporting the bottom of the cast layer.

[0017] Specifically, the protective support plate and the temporary support plate have through holes that are aligned with each other, and bolts are threaded into the through holes to lock the protective support plate and the temporary support plate together.

[0018] Specifically, nuts are welded to the positions of the through holes on the support plate, and the nuts are fixed in place by bolts.

[0019] Specifically, the through hole is a screw hole, and the bolt is fixed in place by fitting into the screw hole.

[0020] Specifically, the temporary support plate has countersunk holes for the through holes, and the bolt heads do not extend beyond the outer side of the temporary support plate.

[0021] Specifically, the bottom surface of the support plate is flush with the bottom surface of the poured layer, and the top surface of the temporary support plate is flush with the bottom surface of the poured layer.

[0022] Specifically, an insulation pad is provided between the support plate and the temporary support plate, and the insulation pad covers the bottom surface of the support plate.

[0023] Specifically, the steel structure is equipped with blocks that are inserted into the insulation pad to fix the insulation pad.

[0024] Specifically, the blocks are arranged horizontally continuously or intermittently on the steel structure; and / or: the blocks are a single-layer structure or arranged in two or more layers longitudinally.

[0025] Specifically, the stop and the support plate are fixed together by screws.

[0026] The beneficial effects of this utility model are:

[0027] This invention relates to a heating furnace with a low thermal conductivity lining support. Compared to existing technologies, this invention uses a support plate to permanently fix the backing layer, while the temporary support plate only supports the cast-in-place layer during transportation, protecting the insulation lining from damage during transfer and hoisting. The temporary support plate is removed before use, thus reducing or eliminating heat transfer between the cast-in-place layer and the support structure during use, reducing the heat transfer area and blocking heat transfer paths, reducing the total heat conduction of the support structure, and improving the heating furnace's insulation effect. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a furnace wall structure in the prior art, showing a support plate installed at the bottom of the insulation lining.

[0030] Figure 2 This is another schematic diagram of a furnace wall structure in the prior art, showing that the bottom and top of the insulation lining are respectively equipped with protective plates.

[0031] Figure 3 for Figure 1 The cross-sectional view with section AA conceals the thermal insulation lining.

[0032] Figure 4 This is a schematic diagram of the furnace wall of a heating furnace with a low thermal conductivity lining according to the present invention.

[0033] Figure 5 This is a schematic diagram of the furnace wall of a heating furnace with a low thermal conductivity lining according to the present invention, in embodiment two.

[0034] Figure 6 This is a schematic diagram of the furnace wall of a heating furnace with a low thermal conductivity lining according to the present invention, in embodiment three.

[0035] Figure 7 for Figure 6 A magnified view of the circled area.

[0036] Figures 1 to 3 Figure label:

[0037] Steel structure 01, thermal insulation lining 02, support plate 03, expansion joint 011.

[0038] Figures 4 to 7 Figure label:

[0039] Steel structure 1;

[0040] Thermal insulation lining 2, backing layer 21, casting layer 22;

[0041] 3. Protective support plate; 4. Temporary support plate; 5. Countersunk hole; 6. Bolt; 7. Nut; 8. Heat insulation pad; 9. Stop block; 10. Screw. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0043] This utility model discloses a heating furnace with a low thermal conductivity lining support, as shown in Embodiment 1. Figure 4 As shown, the furnace includes a modular furnace wall, comprising a steel structure 1 and an insulation lining 2. The insulation lining 2 includes a backing layer 21 fixed to the steel structure 1 and a cast-in-place layer 22 fixed to the inner side of the backing layer 21. A support plate 3 is fixed to the steel structure 1, either by welding or by locking. The support plate 3 supports the bottom of the backing layer 21 and is a permanent structure that is not removed during transportation or production. A temporary support plate 4 is detachably connected to the support plate 3. The temporary support plate 4 supports the bottom of the cast-in-place layer 22 and is only used to temporarily support the cast-in-place layer 22, primarily functioning during transportation. It is removed before production use, thus reducing or eliminating heat transfer between the cast-in-place layer 22 and the support structure during use, reducing the heat transfer area and blocking the heat transfer path, reducing the total heat conduction of the support structure, and improving the insulation effect of the furnace.

[0044] Specifically, the protective support plate 3 and the temporary support plate 4 have aligned through holes, and bolts 6 are threaded into these through holes to lock the protective support plate 3 and the temporary support plate 4 together. Nuts 7 are welded to the protective support plate 3 at the positions aligned with the through holes, and the nuts 7 cooperate with the bolts 6 for fixation. After the heating furnace module is installed in place, the bolts 6 and the temporary support plate 4 are removed, leaving only the protective support plate 3 at the insulation lining 2 to reduce the heat conduction area and reduce heat conduction.

[0045] Specifically, the bottom surface of the support plate 3 is flush with the bottom surface of the pouring layer 22, and the top surface of the temporary support plate 4 is flush with the bottom surface of the pouring layer 22.

[0046] In practice, expansion grooves can be opened in the support plate 3. Alternatively, support plate 3 and temporary support plate 4 can also be set on the top of the insulation lining 2.

[0047] Example 2 Figure 5 As shown, the main difference from Embodiment 1 is that the nut is omitted, and the through holes of the support plate 3 and / or temporary support plate 4 are threaded holes, with the bolt 6 engaging with the threaded holes for fixation. Specifically, the through hole of the temporary support plate 4 is machined with a countersunk hole 5, and the head of the bolt 6 is located in the countersunk hole 5 without extending beyond the outer side of the temporary support plate 4. This ensures that the bolt 6 does not extend beyond the outermost edge of the temporary support plate 4, thus not affecting the clearance space provided by the temporary support plate.

[0048] Example 3 Figure 6 and Figure 7 As shown, the main difference from Embodiment 1 is that a heat insulation layer 8 is provided between the support plate 3 and the temporary support plate 4, and the heat insulation layer 8 covers the bottom surface of the support plate 3.

[0049] Specifically, the steel structure 1 is equipped with a stop block 9, which is inserted into the heat insulation pad 8 to fix the heat insulation pad 8. The stop block 9 and the steel structure 1 are permanently fixed together, and the stop block 9 is used to prevent the heat insulation pad 8 from remaining in its original position after the temporary protective plate is removed. The heat insulation pad is used to block the heat transfer path of the protective plate 3, further reducing heat conduction and improving the insulation effect. Optionally, the heat insulation pad 8 is made of a non-metallic refractory material with a temperature resistance of over 500℃, which can be ceramic fiber material or nano-board, possessing sufficient strength and toughness.

[0050] Specifically, the blocks 9 are arranged horizontally in a continuous manner (e.g., a ring-shaped block) or intermittently in the steel structure 1 (e.g., multiple blocks arranged circumferentially). In the longitudinal direction, the blocks 9 are a single-layer structure or can be arranged in two or more layers, depending on the installation requirements; two layers are shown in the figure.

[0051] Specifically, similarly, the stop block 9 and the support plate 3 also have holes that align with each other, and they are fixed to each other by screws 10 to improve the fixing effect of the heat insulation pad 8.

[0052] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0053] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0054] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0055] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A heating furnace with a low thermal conductivity lining support, comprising a modular furnace wall, the modular furnace wall comprising a steel structure (1) and an insulation lining (2), the insulation lining (2) comprising a backing layer (21) adhered and fixed to the steel structure (1) and a cast-in-place layer (22) adhered and fixed to the inner side of the backing layer (21), characterized in that: The steel structure (1) is fixed with a support plate (3), which supports the bottom of the backing layer (21); the support plate (3) is detachably connected with a temporary support plate (4), which supports the bottom of the casting layer (22).

2. A furnace with low thermal conductive liner protection according to claim 1, characterized in that: The protective plate (3) and the temporary plate (4) have through holes aligned with each other, and bolts (6) are threaded into the through holes to lock the protective plate (3) and the temporary plate (4) together.

3. A furnace with low thermal conductive liner protection according to claim 2, characterized in that: Nuts (7) are welded to the position of the through hole on the support plate (3), and the nuts (7) are fixed together with the bolts (6).

4. A furnace with low thermal conductive liner protection according to claim 2, characterized in that: The through hole is a screw hole, and the bolt (6) is fixed in conjunction with the screw hole.

5. A furnace with low thermal conductive liner support according to claim 4, characterized in that the temporary The through hole of the pallet (4) is countersunk (5), and the head of the bolt (6) does not extend beyond the outer side of the temporary pallet (4).

6. A furnace with low thermal conductive liner protection according to claim 1, characterized in that: The bottom surface of the support plate (3) is flush with the bottom surface of the pouring layer (22), and the top surface of the temporary support plate (4) is flush with the bottom surface of the pouring layer (22).

7. A furnace with low thermal conductive liner protection according to claim 1, characterized in that: A heat insulation pad (8) is provided between the support plate (3) and the temporary support plate (4), and the heat insulation pad (8) covers the bottom surface of the support plate (3).

8. A furnace with low thermal conductive liner protection according to claim 7, characterized in that: The steel structure (1) is provided with a stop (9), which is inserted into the heat insulation pad (8) to fix the heat insulation pad (8).

9. A furnace with low thermal conductive liner protection according to claim 8, characterized in that: The blocks (9) are arranged horizontally continuously or intermittently on the steel structure (1); and / or: the blocks (9) are a single-layer structure or arranged in two or more layers longitudinally.

10. A furnace with low thermal conductive liner protection according to claim 8, characterized in that: The stop block (9) and the support plate (3) are fixed together by screws (10).

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