Heat-insulating and high-temperature-resistant boiler opening structure and pressure-bearing boiler

Abstract

The boiler opening structure comprises an opening body, a first heat insulation layer, a plurality of high-temperature-resistant layers and a back face blocking layer, the first heat insulation layer, the high-temperature-resistant layers and the back face blocking layer form a heat insulation and high-temperature-resistant structure, and the back face blocking layer is of a triangular structure. And when the number of the high-temperature-resistant layers is two or more than two, second heat insulation layers are filled among the high-temperature-resistant layers. According to the boiler opening structure, the high-temperature-resistant layers are divided into a single-layer structure or a multi-layer structure according to the size of a boiler, and the heat insulation layers are filled among the high-temperature-resistant layers, so that high-temperature flue gas or heat in the boiler body achieves a better heat insulation and high-temperature-resistant effect under the multi-layer heat insulation and high-temperature-resistant effects of high temperature resistance, heat insulation and the like; and a triangular back surface plugging layer structure is adopted, so that personnel can conveniently perform back surface pouring plugging, the construction difficulty can be greatly reduced, and the application models are wider.

Description

Technical Field

[0001] The utility model relates to the technical field of heat-insulating and high-temperature-resistant furnace openings, in particular to a heat-insulating and high-temperature-resistant boiler furnace opening structure and a pressure boiler. Background Art

[0002] A boiler is a mechanical device that uses the heat energy of fuel or other energy sources to heat water into hot water or steam. Generally, the outside or key parts of the boiler need to be insulated, especially the burner mouth. During the combustion process, the fuel will generate a lot of heat or high-temperature flue gas at the burner mouth after being ignited. If these places are not insulated, the surface temperature of the equipment will be overheated and the thermal efficiency will be insufficient. If high-temperature resistant treatment is not performed, the surface of the equipment will be burned, causing the burner mouth to overheat, making the equipment undurable.

[0003] For example, Figure 1 A furnace mouth structure filled with rock wool fiber, which only uses rock wool fiber for filling without refractory mud. Although it has a certain heat insulation effect, it is not resistant to high temperature and will cause the furnace mouth to overheat after burning. Figure 2 A furnace mouth structure filled with refractory mud, which is filled entirely with refractory mud. It can withstand high temperatures but does not insulate, which will cause the temperature to radiate from the refractory mud layer, causing the surface temperature to exceed the standard. Figure 3 A furnace mouth structure of refractory mud 1 + rock wool + refractory mud 2 is adopted. However, in the actual manufacturing process, when the square structure of refractory mud 2 is applied to a furnace with a smaller combustion head, it is difficult to construct because personnel cannot drill into the interior to cast and seal the back, thus limiting its application model. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a heat-insulating and high-temperature-resistant boiler furnace mouth structure to solve the above-mentioned traditional problems.

[0005] The second purpose of the utility model is to provide a pressure boiler adopting the heat-insulating and high-temperature resistant boiler furnace structure.

[0006] One of the purposes of the utility model is achieved by the following technical solution:

[0007] A heat-insulating and high-temperature-resistant boiler furnace mouth structure comprises a furnace mouth body, a first heat-insulating layer, a plurality of high-temperature-resistant layers and a back-sealing layer sequentially filled in the furnace mouth body from the outside to the inside, wherein the first heat-insulating layer, the high-temperature-resistant layer and the back-sealing layer form a heat-insulating and high-temperature-resistant structure, wherein the back-sealing layer is a triangular structure, and when the number of the high-temperature-resistant layers is two or more, a second heat-insulating layer is filled between each of the high-temperature-resistant layers.

[0008] Preferably, the first thermal insulation layer is composed of one or more layers of aluminum silicate fiberboard. When the number of aluminum silicate fiberboards is two or more, each layer of the aluminum silicate fiberboard is bonded with high temperature resistant glue.

[0009] Preferably, the gap between the first heat insulation layer and the flange cover of the furnace mouth body is filled with first thermal insulation cotton.

[0010] Preferably, the high temperature resistant layer is a prefabricated refractory mud ring.

[0011] Preferably, a second thermal insulation cotton is filled in the gap between the high temperature resistant layer and the cylinder of the furnace mouth body.

[0012] Preferably, the second thermal insulation layer is composed of one or more layers of aluminum silicate fiberboard. When the number of aluminum silicate fiberboards is two or more, each layer of the aluminum silicate fiberboards is bonded with high temperature resistant glue.

[0013] Preferably, the back sealing layer is cast by refractory mud.

[0014] Preferably, the thickness of the first heat insulation layer is 40-50 mm, the thickness of the second heat insulation layer is 40-50 mm, and the thickness of the high temperature resistant layer is 70-85 mm.

[0015] Preferably, the inner ring surface of the heat-insulating and high-temperature-resistant structure is coated with an inner ring layer of refractory mud.

[0016] The second purpose of the utility model is achieved by the following technical solution:

[0017] A pressure boiler comprises the above-mentioned heat-insulating and high-temperature-resistant boiler furnace mouth structure.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The boiler furnace mouth structure of the utility model divides the high-temperature resistant layer into a single-layer or multi-layer structure according to the size of the furnace type, and fills an insulating layer between each high-temperature resistant layer, so that the high-temperature flue gas or heat in the boiler body can achieve better thermal insulation and high-temperature resistance effect under the action of multiple layers of thermal insulation and high-temperature resistance such as high-temperature resistance and heat insulation. At the same time, a triangular back sealing layer structure is adopted to facilitate personnel to perform back pouring and sealing, which can greatly reduce the difficulty of construction and make its application models more extensive, and can be suitable for furnaces with smaller combustion heads. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A furnace mouth structure of prior art 1;

[0021] Figure 2 A furnace mouth structure of prior art 2;

[0022] Figure 3 A furnace mouth structure of prior art 3;

[0023] Figure 4 This is a structural schematic diagram of a heat-insulating and high-temperature-resistant boiler furnace structure according to a preferred embodiment of the utility model;

[0024] Figure 5 for Figure 4 An enlarged view of A is shown.

[0025] In the figure: 10, furnace mouth body; 20, first heat insulation layer; 30, high temperature resistant layer; 40, back sealing layer; 50, second heat insulation layer; 60, boiler body. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that the terms "first" and "second" 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the description of the present utility model, it is necessary to understand that when an element is considered to be "connected" to another element, it may be directly connected to another element or there may be intermediate elements at the same time. On the contrary, when an element is said to be "directly" connected to another element, there are no intermediate elements.

[0029] See also Figure 4 and Figure 5, which is a heat-insulating and high-temperature-resistant boiler furnace mouth structure of a preferred embodiment of the utility model, is used to be installed on a boiler and is connected to a boiler body 60 through a circular ring position. Specifically, the boiler furnace mouth structure includes a furnace mouth body 10, a first heat-insulating layer 20 filled in the furnace mouth body 10 from the outside to the inside, a plurality of high-temperature resistant layers 30 and a back sealing layer 40. The first heat-insulating layer 20, the high-temperature resistant layer 30, and the back sealing layer 40 form a heat-insulating and high-temperature-resistant structure. The back sealing layer 40 is a triangular structure. When the number of high-temperature resistant layers 30 is two or more, a second heat-insulating layer 50 is filled between each high-temperature resistant layer 30.

[0030] The above-mentioned boiler furnace mouth structure divides the high-temperature resistant layer 30 into a single-layer or multi-layer structure according to the size of the furnace, and fills an insulation layer between each layer of the high-temperature resistant layer 30, so that the high-temperature flue gas or heat in the boiler body 60 can achieve better insulation and high-temperature resistance effect under the action of multiple layers of heat insulation and high-temperature resistance such as high-temperature resistance and heat insulation. At the same time, the triangular back sealing layer 40 structure is adopted to facilitate personnel to perform back pouring and sealing, which can greatly reduce the difficulty of construction and make its application models more extensive, and can be suitable for furnaces with smaller combustion heads.

[0031] In one embodiment, the first thermal insulation layer 20 is composed of one or more layers of aluminum silicate fiberboard. When the number of aluminum silicate fiberboards is two or more, each layer of aluminum silicate fiberboard is bonded by high temperature resistant glue to facilitate splicing of each layer of aluminum silicate fiberboard and facilitate assembly. After assembly, a layer of refractory mud will be applied to the surface of the entire aluminum silicate fiberboard to shape it, and the furnace mouth flange will press the aluminum silicate fiberboard to avoid gaps in the heat-insulating and high-temperature resistant structure. Optionally, the high temperature resistant glue is HR-8767A high temperature glue. In other embodiments, the high temperature resistant glue can also be other types of high temperature resistant glue. In this embodiment, the gap between the first thermal insulation layer 20 and the flange cover of the furnace mouth body 10 is filled with a first thermal insulation cotton (not shown) to play a thermal insulation role.

[0032] In one embodiment, the high temperature resistant layer 30 is a prefabricated refractory mud ring. The refractory mud ring is made of refractory mud and is prefabricated. It is first cast into a predetermined size. After the furnace mouth is welded, the prefabricated refractory mud ring is inserted into the furnace mouth pipe and fixed. The back is sealed with a blocking layer. The refractory mud can be prefabricated and can be taken as needed. The refractory mud slices are easier to dry, and the weight of a single piece can be controlled, which is convenient for adjustment during assembly. Figure 4As shown, the number of high temperature resistant layers 30 is 2, and a second heat insulation layer 50 is filled in the middle. In this embodiment, the refractory clay material is a material of the prior art, which will not be described one by one here. Optionally, considering that the diameter of the prefabricated refractory clay ring is generally slightly smaller than the inner ring diameter of the furnace mouth pipe, the gap between the high temperature resistant layer 30 and the cylinder of the furnace mouth body 10 is filled with a second heat insulation cotton (not shown in the figure) to play a heat insulation role, to prevent the high temperature flue gas from being conducted from the gap to the surface of the furnace mouth, resulting in high temperature, and also to facilitate the installation of the refractory clay ring. Similarly, the second heat insulation cotton is also filled in the gap between the first heat insulation layer 20, the second heat insulation layer 50 and the cylinder of the furnace mouth body 10. Through its function, it is prevented from generating a gap between the cylinder of the furnace mouth body 10 and the heat-insulating and high temperature resistant structure, so that the high temperature flue gas is conducted from the gap to the surface of the furnace mouth.

[0033] In other embodiments, the second thermal insulation layer 50 is composed of one or more layers of aluminum silicate fiberboard. When the number of aluminum silicate fiberboards is two or more, each layer of aluminum silicate fiberboard is bonded by high temperature resistant glue to facilitate splicing of each layer of aluminum silicate fiberboard for easy assembly. After assembly, a layer of refractory mud will be coated on the surface of the entire aluminum silicate fiberboard to shape it. The refractory mud ring of the high temperature resistant layer 30 will press the aluminum silicate fiberboard to avoid gaps in the thermal insulation and high temperature resistant structure. The back sealing layer 40 is cast by refractory mud. After the refractory mud material is welded at the furnace mouth, the prefabricated refractory mud ring is inserted into the furnace mouth pipe and fixed, and then cast on the back of the furnace mouth to seal it. Among them, the back sealing layer 40 is a right triangle structure.

[0034] In this embodiment, the first thermal insulation wool is one or more of glass fiber, mineral wool, ceramic fiber, rock wool, basalt, and gypsum. The second thermal insulation wool is one or more of glass fiber, mineral wool, ceramic fiber, rock wool, basalt, and gypsum.

[0035] After assembly, the inner ring surface of the heat-insulating and high-temperature resistant structure is coated with a refractory mud inner ring layer (not shown), which is shaped to make the surface of each layer regular and convenient for installing the burner. In one embodiment, the thickness of the refractory mud inner ring layer is set to a specific thickness according to the diameter of the burner.

[0036] In one embodiment, the thickness of the first heat insulation layer 20 is but not limited to 40-50 mm, such as 40 mm, 42 mm, 44 mm, 45 mm, 46 mm, 48 mm, 50 mm, etc., the thickness of the second heat insulation layer 50 is but not limited to 40-50 mm, such as 40 mm, 42 mm, 44 mm, 45 mm, 46 mm, 48 mm, 50 mm, etc., and the thickness of the high temperature resistant layer 30 is but not limited to 70-85 mm, such as 70 mm, 72 mm, 74 mm, 75 mm, 76 mm, 78 mm, 80 mm, 82 mm, 84 mm, 85 mm, etc. Among the thicknesses of the above layers, the thickness of the first heat insulation layer 20 and the thickness of the second heat insulation layer 50 can be adjusted according to the actual length of the furnace mouth, and are not necessarily set according to the above dimensions.

[0037] It should be specially noted that the first thermal insulation layer 20, the high temperature resistant layer 30, the back sealing layer 40 and other structures are all arranged according to the structure of the furnace mouth. Since the structure of the furnace mouth is roughly circular, the first thermal insulation layer 20, the high temperature resistant layer 30, the back sealing layer 40 and other structures are all in the shape of a ring.

[0038] After the above structures are assembled in an integral form, they are welded to the boiler body 60 and welded together with the boiler body 60 through the circular ring of the furnace body. After the furnace mouth is welded, the prefabricated refractory mud ring, the first insulation layer 20, and the second insulation layer 50 are inserted into the furnace mouth pipe and fixed, and the back is sealed with a sealing layer. Finally, a refractory mud inner ring layer is applied on the inner ring surface, and then other equipment is installed.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it 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 heat-insulating and high-temperature-resistant boiler furnace structure, characterized in that: It includes a furnace mouth body, a first heat insulation layer filled in the furnace mouth body from the outside to the inside, a plurality of high temperature resistant layers and a back sealing layer, the first heat insulation layer, the high temperature resistant layer and the back sealing layer form a heat insulation and high temperature resistant structure, the back sealing layer is a triangular structure, when the number of high temperature resistant layers is two or more, a second heat insulation layer is filled between each high temperature resistant layer.

2. The heat-insulating and high-temperature-resistant boiler furnace structure according to claim 1, characterized in that: The first heat insulation layer is composed of one or more layers of aluminum silicate fiberboard. When the number of aluminum silicate fiberboards is two or more, each layer of the aluminum silicate fiberboard is bonded with high temperature resistant glue.

3. The heat-insulating and high-temperature-resistant boiler furnace structure according to claim 2 is characterized in that: The gap between the first heat insulation layer and the flange cover of the furnace mouth body is filled with first thermal insulation cotton.

4. The heat-insulating and high-temperature-resistant boiler furnace structure according to claim 1, characterized in that: The high temperature resistant layer is a prefabricated refractory mud ring.

5. The heat-insulating and high-temperature-resistant boiler furnace structure according to claim 4, characterized in that: The gap between the high temperature resistant layer and the cylinder of the furnace mouth body is filled with second thermal insulation cotton.

6. The heat-insulating and high-temperature-resistant boiler furnace structure according to claim 1, characterized in that: The second heat insulation layer is composed of one or more layers of aluminum silicate fiberboard. When the number of aluminum silicate fiberboards is two or more, each layer of the aluminum silicate fiberboards is bonded with high temperature resistant glue.

7. The heat-insulating and high-temperature-resistant boiler furnace structure according to claim 1, characterized in that: The back side sealing layer is cast by refractory mud.

8. The heat-insulating and high-temperature-resistant boiler furnace structure according to claim 1, characterized in that: The thickness of the first heat insulation layer is 40-50 mm, the thickness of the second heat insulation layer is 40-50 mm, and the thickness of the high temperature resistant layer is 70-85 mm.

9. The heat-insulating and high-temperature-resistant boiler furnace structure according to claim 1, characterized in that: The inner ring surface of the heat-insulating and high-temperature-resistant structure is coated with a refractory mud inner ring layer.

10. A pressure boiler, characterized in that: It comprises the heat-insulating and high-temperature-resistant boiler furnace mouth structure as described in any one of claims 1 to 9.

Images