Thermal insulation structure with perforated furnace wall and boiler

Abstract

The utility model discloses a boiler wall perforated heat preservation structure and a boiler. The heat preservation structure of the furnace wall through hole is arranged on the peripheral wall of the furnace wall through hole in a surrounding mode, and a first heat preservation space formed by filling of high-aluminum refractory castable is arranged on the periphery of the peripheral wall of the heat preservation structure. According to the heat preservation structure, heat preservation on the periphery of the furnace wall perforated channel can be achieved, the possibility that heat is dissipated through air holes is reduced, the overall heat efficiency of furnace wall heat preservation is improved, and the construction difficulty is small.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal insulation of boiler furnace walls, in particular to a furnace wall perforated thermal insulation structure and a boiler. Background Art

[0002] In the production and operation of waste heat boilers, boiler wall insulation is a very important engineering content. It is not only related to the safety of the working environment of on-site equipment and on-site management personnel, but also an important measure to improve the overall thermal efficiency of the boiler, reduce heat loss, and improve economic benefits. How to improve the efficiency of furnace wall insulation and reduce the difficulty of construction is the key to increasing boiler efficiency and reducing costs. Since there is no water-cooled wall to block the flue gas from the outside world, the insulation difficulty at the perforated water-cooled wall of the boiler is higher, which is also the key difficulty of boiler insulation. Utility Model Content

[0003] In view of this, the present invention aims to solve one of the problems in the related art at least to a certain extent.

[0004] The present application provides a furnace wall perforated insulation structure. The insulation structure is arranged around the outer peripheral wall of the furnace wall perforation, and the insulation structure is provided with a first insulation space filled with high-alumina refractory castable around the outer peripheral wall.

[0005] In some embodiments, the insulation structure includes a first metal plate, a second metal plate and a water-cooled wall. The water-cooled wall is arranged at intervals around the outer peripheral wall of the furnace wall perforation. The water-cooled wall includes a water-cooled steel pipe and a water-cooled steel plate connected to the water-cooled steel pipe. The first metal plate is vertically fixed on the outer peripheral wall at the perforation of the furnace wall. The second metal plate is vertically welded to the first metal plate. The first metal plate, the second metal plate, the outer peripheral wall, the water-cooled steel plate and the outer tube wall of the water-cooled steel pipe form the first insulation space.

[0006] In certain embodiments, the first metal plate is a perforated steel plate, and the second metal plate is a comb plate.

[0007] In certain embodiments, the length of the perforated steel plate is positively correlated with the diameter of the furnace wall perforations.

[0008] In certain embodiments, an anti-corrosion material is provided at the junction of the high-alumina refractory castable and the water-cooled wall.

[0009] In certain embodiments, the anti-corrosion material is asphalt.

[0010] In some embodiments, the insulation structure further includes a second insulation space, and aluminum silicate fiber felts are staggered and bonded between the water-cooled walls outside the first insulation space to form the second insulation space.

[0011] In some embodiments, the insulation structure includes insulation hooks and an outer protective plate, the outer protective plate is vertically welded to the second metal plate, an insulation hook is provided in the second insulation space, one end of the insulation hook is welded to the water-cooled steel plate, and the other end of the insulation hook is fixed to the outer protective plate.

[0012] In some embodiments, the outer guard plate is provided with a through hole, and the thermal insulation hook nail passes through the through hole and is bent and fixed on the outer guard plate.

[0013] The present application also provides a boiler, wherein the boiler comprises a furnace wall perforation and a thermal insulation structure according to any one of the above embodiments.

[0014] In this way, the insulation structure of the furnace wall perforation of the present application is arranged around the outer peripheral wall of the furnace wall perforation, and a first insulation space filled with high-aluminum refractory castable is provided around the outer peripheral wall, which can achieve insulation around the furnace wall perforation channel, reduce the possibility of heat loss through the pores, improve the overall thermal efficiency of the furnace wall insulation, and the construction difficulty is relatively small.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 It is one of the schematic diagrams of the thermal insulation structure of the furnace wall perforation according to the embodiment of the present application;

[0018] Figure 2 This is the second schematic diagram of the thermal insulation structure of the furnace wall perforation according to the embodiment of the present application;

[0019] Figure 3 yes Figure 1 Schematic diagram of the cross section along line AA.

[0020] Main component reference numbers:

[0021] Insulation structure 100;

[0022] Furnace wall perforations 10, peripheral wall 20, high-alumina refractory castable 30, first insulation space 40, second insulation space 80, first metal plate 50, second metal plate 60, water-cooled wall 70, water-cooled steel pipe 71, water-cooled steel plate 72, outer pipe wall 711; aluminum silicate fiber felt 90, insulation hooks 110 and outer protective plate 120. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, and may refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection, or mutual communication; direct connection, indirect connection through an intermediate medium, internal connection between two elements, or interaction between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] Please also read Figure 1 , Figure 2 and Figure 3The present application provides a furnace wall perforated insulation structure 100. The insulation structure 100 is arranged around the outer peripheral wall 20 of the furnace wall perforated 10, and the insulation structure 100 is provided with a first insulation space 40 filled with high-alumina refractory castable 30 around the outer peripheral wall 20.

[0029] Specifically, the design of the furnace wall perforations 10 can prevent the hot flame and smoke from leaking out when the boiler is operated under positive pressure, protect the safety of the operating personnel, and maintain the environmental sanitation of the boiler room. The furnace wall perforations 10 can also maintain good smoke flow, help the fuel to burn fully in the furnace, reduce the loss caused by incomplete combustion, and improve the combustion efficiency of the boiler.

[0030] The boiler generates a large amount of heat energy during operation. Applying the insulation structure 100 outside the furnace wall can effectively reduce the loss of this heat energy to the external environment. In the boiler system, steam may condense into water droplets due to the influence of the external temperature. The presence of these water droplets will affect the stable operation of the boiler. The protection of the insulation structure 100 can effectively prevent steam condensation and ensure the normal and stable operation of the boiler system.

[0031] However, when the insulation structure 100 is arranged on the outer peripheral wall 20 of the furnace wall perforation 10 of the boiler furnace wall, the perforation is likely to become a potential risk point for smoke leakage. Therefore, when the insulation structure 100 is arranged on the outer peripheral wall 20 of the furnace wall perforation 10 of the boiler, in addition to requiring the insulation material to have high temperature resistance, corrosion resistance, low thermal conductivity and convenient construction, it must also have good sealing performance against gas to ensure the effectiveness and safety of the insulation structure 100.

[0032] The first insulation space 40 is filled with a high-aluminum refractory castable 30. Compared with conventional insulation materials such as aluminum silicate fiber products, since the smoke is easy to leak at the furnace wall perforation 10 and the temperature is higher, general aluminum silicate fiber products cannot withstand such high temperatures and harsh environments. The high-aluminum refractory castable 30 has an extremely high refractory temperature, which can reach above 1500°C. It can be directly cast into an integral lining or prefabricated into a refractory prefabricated block, which is convenient for construction, while also taking into account excellent volume stability, strength, thermal shock resistance, and abrasion resistance. Therefore, the high-aluminum refractory castable 30 has a better insulation effect on the furnace wall perforation 10.

[0033] In this way, a first insulation space 40 filled with high-alumina refractory castable 30 is provided around the outer wall 20 of the furnace wall perforation 10, which can achieve insulation around the furnace wall perforation 10, reduce heat loss, improve the overall thermal efficiency of the furnace wall insulation, and has less construction difficulty.

[0034] The heat preservation structure 100 includes a first metal plate 50, a second metal plate 60 and a water-cooled wall 70. The water-cooled wall 70 is arranged around the outer peripheral wall 20 of the furnace wall through hole 10. The water-cooled wall 70 includes a water-cooled steel pipe 71 and a water-cooled steel plate 72 connected to the water-cooled steel pipe 71. The first metal plate 50 is vertically fixed on the outer peripheral wall 20 of the furnace wall through hole 10. The second metal plate 60 is vertically welded to the first metal plate 50. The first metal plate 50, the second metal plate 60, the outer peripheral wall 20, the water-cooled steel plate 72 and the outer tube wall 711 of the water-cooled steel pipe 71 enclose the first heat preservation space 40. Figure 3 As shown, the outer tube wall 711 is the lower half of the outer tube wall of the water-cooled steel tube 71, and is located in the outer layer relative to the furnace wall.

[0035] Specifically, the present application can first vertically fix the first metal plate 50 on the peripheral wall 20, and then vertically weld the second metal plate 60 on the first metal plate 50. In this way, the first metal plate 50, the second metal plate 60, the peripheral wall 20, the water-cooled steel plate 72 and the outer tube wall 711 of the water-cooled steel pipe 71 relative to the outer layer of the furnace wall constitute the first insulation space 40, so that the insulation structure 100 is closely attached to the peripheral wall 20 of the furnace wall perforation 10, so that the peripheral wall 20 of the furnace wall perforation 10 is protected from corrosion by the external environment, and the life of the perforated channel 10 is extended. The welding construction process is relatively simple, and the metal plate can be modified in size and installed as needed to adapt to pipes of different shapes and sizes, so as to facilitate the formation of first insulation spaces 40 of different sizes.

[0036] In one embodiment, the first metal plate 50 is a perforated steel plate, and the second metal plate 60 is a comb-shaped plate.

[0037] Specifically, the perforated steel plate can be made of a variety of metal materials such as stainless steel plate, aluminum plate, iron plate, low carbon steel plate, copper plate, etc., and has the characteristics of corrosion resistance, firmness and durability. In the embodiment, the perforated steel plate plays a role in fixing the high-aluminum refractory castable 30 filled in the first insulation space 40.

[0038] Common materials for the comb-shaped plate include steel plates, stainless steel and copper. The comb-shaped plate can serve as a support and fixing structure between different materials in the thermal insulation structure 100. By arranging the comb-shaped plate, the present application can ensure that the thermal insulation materials in the thermal insulation structure 100 can fit together tightly, avoid gaps and looseness between the materials, and thus enhance the integrity and stability of the thermal insulation structure 100.

[0039] See also Figure 3In some embodiments, the length d of the perforated steel plate is positively correlated with the diameter D of the furnace wall perforation 10. It can be understood that the larger the diameter of the furnace wall perforation 10, the higher the insulation effect requirement for the first insulation space 40. Since the length of the perforated steel plate can determine the size of the first insulation space 40, the larger the diameter of the furnace wall perforation 10, the longer the length of the perforated steel plate, and the length d of the perforated steel plate is positively correlated with the diameter D of the furnace wall perforation 10.

[0040] For example, the diameter of the furnace wall perforation 10 may be 180 mm, and the length of the perforated steel plate may be about 300 mm, which is not limited here.

[0041] That is to say, the present application can select a suitable length of the perforated steel plate according to the diameter of the furnace wall perforation 10. For example, the diameter of the furnace wall perforation 10 can be 150 to 200 mm, and the length of the perforated steel plate can be about twice the diameter of the furnace wall perforation 10. In this way, the size of the insulation space 40 constructed is more appropriate.

[0042] In addition, the length of the perforated steel plate determines the total amount of high-aluminum refractory castables 30 filled in the first insulation space 40. The longer the length, the more high-aluminum refractory castables 30 there are, and the better the insulation effect.

[0043] In one embodiment, water-cooled walls 70 are arranged around the outer peripheral wall 20 of the furnace wall through-hole 10 , and anti-corrosion material is provided at the joint between the high-alumina refractory castable 30 and the water-cooled wall 70 .

[0044] Specifically, the water-cooled wall 70 is the main heat receiving part of the boiler and is distributed around the boiler furnace. The inside of the water-cooled wall 70 is flowing water or steam, and the outside receives the heat of the flame of the boiler furnace. The water-cooled wall 70 in the thermal insulation structure 100 of the furnace wall perforation 10 has important functions in the boiler system, such as absorbing radiant heat, cooling and protecting the furnace wall, and forming an evaporation heating surface.

[0045] It can be understood that the insulation structure 100 of the present application does not have a water-cooled wall 70 for ventilation except for the perforated channel 10, and water-cooled walls 70 are arranged at other positions of the insulation structure 100. One end of the comb plate 60 is welded to the perforated steel plate, and the other end of the comb plate 60 is welded to the water-cooled wall 70, so that a sealed first insulation space 40 is formed.

[0046] Since water vapor flows inside the water-cooled wall 70, corrosion of the high-alumina refractory castable 30 by moisture in the water-cooled wall 70 should be avoided, and anti-corrosion materials are provided at the joints.

[0047] In one embodiment, the anti-corrosion material is asphalt.

[0048] Applying asphalt at the junction of the furnace wall insulation material and the water-cooled wall 70 can form a waterproof layer, which effectively prevents moisture from penetrating into the insulation material, maintains the dryness and insulation performance of the insulation material, and indirectly plays an anti-corrosion role.

[0049] At the same time, since asphalt itself is a non-heat-conducting material, it can also reduce heat loss to a certain extent and improve the thermal insulation effect inside the furnace wall.

[0050] In the embodiment of the present application, the heat preservation structure 100 further includes a second heat preservation space 80. Aluminum silicate fiber felts 90 are staggered and bonded between the water-cooled walls 70 outside the first heat preservation space 40 to form the second heat preservation space 80.

[0051] See also Figure 3 The insulation structure 100 as a whole includes a furnace wall through hole 10, an outer peripheral wall 20, a first insulation space 40 and a second insulation space 80. The first insulation space 40 and the second insulation space 80 are separated by a water-cooled wall 70.

[0052] Except for the area around the furnace wall perforation 10, the heat preservation structure 100 at other positions of the furnace wall has a lower high temperature resistance requirement, and aluminum silicate fiber felt 90 and water-cooled wall 70 can be used to form a second heat preservation space 80. The aluminum silicate fiber felt 90 can be laid in 4 layers, and the thickness of a single layer can be 40 mm.

[0053] Specifically, the aluminum silicate fiber felt 90 is a new type of high-temperature thermal insulation material with good thermal insulation performance and high temperature resistance. The aluminum silicate fiber felt 90 has good softness and is easy to process and customize. This allows it to be cut and pasted according to the specific shape and size of the water-cooled wall 70 to form a relatively neat closed insulation layer. Through staggered gluing, the aluminum silicate fiber felt 90 can fit tightly on the water-cooled wall 70, reducing gaps and air circulation, thereby improving the sealing and thermal insulation effect of the insulation layer. The aluminum silicate fiber felt 90 has anti-aging ability, and its thermal insulation performance does not decrease over time, reducing the frequency and cost of replacing insulation materials.

[0054] In detail, the aluminum silicate fiber felt 90 is fixed with a wire mesh on the outside, and the wire mesh has a certain elasticity and flexibility, which can adapt to the slight deformation or unevenness of the aluminum silicate fiber felt 90 during the installation process. The use of the wire mesh can effectively fix the aluminum silicate fiber felt 90 to prevent it from moving or seriously deforming under the action of wind, gravity or other external factors.

[0055] See also Figure 3The insulation structure 100 further includes an insulation hook nail 110 and an outer guard plate 120. The outer guard plate 120 is vertically welded to the second metal plate 60, and the insulation hook nail 110 is arranged in the second insulation space 80, one end of the insulation hook nail 110 is welded to the water-cooled steel plate 72, and the other end of the insulation hook nail 110 is fixed to the outer guard plate 120.

[0056] The starting ends of the insulation hook nails 110 of the second insulation space 80 are fixedly welded to the water-cooled wall 70 , and the insulation hook nails 110 are used to fix the aluminum silicate fiber felt 90 .

[0057] The outer guard plate 120 can be made of, for example, a square hollow steel material. The square hollow steel has excellent fireproof performance and lightweight characteristics, which can save steel and reduce weight. The outer guard plate 120 is vertically welded to the comb plate 60, and the outer guard plate 120 is used to support and fix the aluminum silicate fiber felt 90 in the second insulation space 80.

[0058] In one embodiment, the outer guard plate 120 is provided with a through hole, and the heat preservation hook nail 110 passes through the through hole and is bent and fixed on the outer guard plate 120. In other words, the end of the heat preservation hook nail 110 can pass through the through hole of the outer guard plate 120, and the end of the heat preservation hook nail 110 is bent and fixed on the outer guard plate 120.

[0059] Specifically, the heat preservation hook nail 110 has the characteristics of good anti-corrosion performance, high compression and tensile performance, and not easy to deform. The heat preservation hook nail 110 is provided with a corrugated section in the nail rod section, which can change the expansion of the nail rod section in the length direction and reduce the expansion coefficient in the length direction. In this way, the damage of the hook nail to the heat preservation material can be reduced, and the cracking or even peeling of the heat preservation material can be avoided, thereby reducing the loss of heat, reducing the operating cost of the boiler, and extending the service life of the heat preservation layer.

[0060] The present application also provides a boiler. The boiler includes a furnace wall perforation and a thermal insulation structure as described in any of the above embodiments. Specifically, the structure of the thermal insulation structure 100 is as described above and will not be repeated here.

[0061] In this way, the boiler of the present application is provided with a first insulation space 40 filled with high-alumina refractory castable 30 around the outer wall 20 of the furnace wall perforation 10, which can achieve insulation around the furnace wall perforation 10, reduce heat loss, improve the overall thermal efficiency of the furnace wall insulation, and has less construction difficulty.

[0062] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A furnace wall perforated insulation structure, characterized in that: The insulation structure is arranged around the outer peripheral wall of the furnace wall perforation, and the insulation structure is provided with a first insulation space filled with high-alumina refractory castable around the outer peripheral wall; The insulation structure includes a first metal plate, a second metal plate and a water-cooled wall. The water-cooled wall includes a water-cooled steel pipe and a water-cooled steel plate connected to the water-cooled steel pipe. The water-cooled walls are arranged at intervals around the outer peripheral wall of the furnace wall perforation. The first metal plate is vertically fixed on the outer peripheral wall of the furnace wall perforation. The second metal plate is vertically welded to the first metal plate. The first metal plate, the second metal plate, the outer peripheral wall, the water-cooled steel plate and the outer tube wall of the water-cooled steel pipe form the first insulation space.

2. The thermal insulation structure according to claim 1, characterized in that: The first metal plate is a perforated steel plate, and the second metal plate is a comb-shaped plate.

3. The thermal insulation structure according to claim 2, characterized in that: The length of the perforated steel plate is positively correlated with the diameter of the furnace wall perforations.

4. The thermal insulation structure according to claim 1, characterized in that: An anti-corrosion material is provided at the junction of the high-alumina refractory castable and the water-cooled wall.

5. The thermal insulation structure according to claim 4, characterized in that: The anti-corrosion material is asphalt.

6. The thermal insulation structure according to claim 5, characterized in that: The thermal insulation structure also includes a second thermal insulation space, and aluminum silicate fiber felts are staggered and bonded between the water-cooled walls outside the first thermal insulation space to form the second thermal insulation space.

7. The thermal insulation structure according to claim 6, characterized in that: The insulation structure includes insulation hooks and an outer protective plate, the outer protective plate is vertically welded to the second metal plate, an insulation hook is provided in the second insulation space, one end of the insulation hook is welded to the water-cooled steel plate, and the other end of the insulation hook is fixed to the outer protective plate.

8. The thermal insulation structure according to claim 7, characterized in that: The outer guard plate is provided with a through hole, and the heat-insulating hook nail passes through the through hole and is bent and fixed on the outer guard plate.

9. A boiler, characterized in that: The boiler comprises furnace wall perforations and the thermal insulation structure according to any one of claims 1 to 8.

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